707 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 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 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.

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.

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 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 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.

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.

The invention relates to a train braking system and method. The train braking system comprises a controller, an auxiliary air cylinder, a braking cylinder, a pneumatic control valve and an electric pneumatic control valve. The electric pneumatic control valve comprises a switching valve and an isolating valve; the pneumatic control valve comprises a main valve and a local reduction chamber, the local reduction chamber is connected with the main valve through a local reduction chamber air path, and the isolating valve is arranged on the local reduction chamber air path; the auxiliary air cylinder is connected with the switching valve through a first auxiliary air cylinder air channel and a second auxiliary air cylinder air channel. The brake cylinder is connected with the switching valve through a brake cylinder gas circuit; the controller controls the opening and closing of the isolating valve and the switching valve to switch the gas path; the electric pneumatic control valve and the main valve are arranged on the first auxiliary air cylinder air channel and the second auxiliary air cylinder air channel respectively, and the switching valve is used for conducting exclusive switching on the conduction state between the first auxiliary air cylinder air channel and the brake cylinder air channel and the conduction state between the second auxiliary air cylinder air channel and the brake cylinder air channel. The electric control and gas circuit switching strategy and the dynamic isolation protection strategy are additionally arranged, so that the electro-pneumatic hybrid braking system is quick in response, and active fault tolerance of system faults is achieved.

The invention discloses a combinable multi-way valve adopting a double-valve-element structure, and relates to the technical field of new energy automobile heat pump heat management systems, the combinable multi-way valve comprises a valve body, a first valve element, a second valve element, a valve element driving unit and a plurality of water pipe connectors; according to the combinable multi-way valve adopting the double-valve-element structure, the two independent valve cavities are formed in the single valve body, and the first valve element and the second valve element which are controlled by the valve element driving unit through a synchronous and asynchronous gear system are arranged; through cooperation of a middle sealing ring used for isolating a valve cavity and a connector sealing ring used for guaranteeing external sealing, cooperative and non-cooperative accurate rotation control over the two cylindrical valve elements can be achieved through a single motor driving system, and therefore the purpose that the two cylindrical valve elements can be accurately rotated and controlled on the premise that reliable sealing and independent action of the valve elements are guaranteed is achieved. The complexity of a mechanical structure and an electric control system controlled by multiple channels is remarkably simplified, and a solid structural foundation is laid for further realizing multifunctional integration.

A vacuum interconnection system for sample exchange between MOCVD and MBE comprising an MOCVD growth chamber (1), an MOCVD transition chamber (2), a flip chamber (3), an MBE transition chamber (4) and an MBE growth chamber (5) which are connected in sequence, wherein adjacent chambers are isolated from each other by an isolation valve; an MOCVD transition chamber manipulator (21) is provided in the MOCVD transition chamber (2); a transfer plate (31), a filtration plate (32), a liftable and rotatable transfer component (33), a first lifting assembly (34) and a second lifting assembly (35) are provided in the flip chamber (3), a plurality of wafer carrier slots (311) being provided on the transfer plate (31), a plurality of wafer filtration through holes (321) being provided on the filtration plate (32), the diameter of each of the wafer filtration through holes (321) being greater than the diameter of a wafer (100) and smaller than the diameter of a wafer carrier (101), and a placement portion (322) being provided on an upper surface and a lower surface of the filtration plate (32); a manipulator box (6) is connected to one side of the flip chamber (3), and a flipping manipulator (61) is provided in the manipulator box (6); and an MBE transition chamber manipulator (41) is provided in the MBE transition chamber (4). According to the present invention, the need for contact with a wafer growth surface is eliminated, thereby lowering the risk of wafer surface damage and contact-induced contamination; and the need for clamping a wafer peripheral region is eliminated, thereby lowering the risk of chipping caused by a compressive stress.

The invention provides a ball valve body rotation stopping method and system of a two-way stratum isolation valve, and belongs to the field of oil and gas wells, and the method comprises the steps that environment data of a ball valve body and sensors around the ball valve body are obtained, all the environment data are preprocessed, and an environment state data set is generated; according to the position finding requirement of the ball valve body, a reinforcement learning model is constructed, the environment state data set serves as input, and optimal position finding parameters of the ball valve body are output; current underground working condition characteristics of the environment state data set are extracted, self-adaptive adjustment is conducted on the optimal position finding parameters based on the current underground working condition characteristics, and the optimal rotation stopping torque is generated; constructing a sealing state prediction model according to the optimal rotation stopping torque and the sealing monitoring key variables of the environment state data set, evaluating the sealing quality and predicting the leakage trend, detecting abnormal conditions, performing intelligent fine adjustment, and generating optimal rotation stopping parameters; and generating an optimal position finding parameter corresponding to the adjustment target based on the optimal rotation stopping torque and the rotation stopping torque adjustment amount.

The invention provides a hydraulic system structure capable of detecting internal leakage of an isolating valve and an internal leakage detection method, relates to the technical field of mechanical design of hydraulic systems, and solves the limitation problem that an existing detection mode is time-consuming and labor-consuming. The hydraulic system structure is sequentially connected with an isolating valve, a main distributing system oil source pipeline and a main distributing valve from a pressure oil tank; the main distributing valve is connected with a first servomotor and a second servomotor, the first servomotor and the second servomotor are both connected to the control ring, and the main distributing valve is further connected to the oil collecting tank through a cavity closing oil return pipeline. The isolating valve is further connected with a control valve, the control valve is provided with an oil supply port P, an oil return port T, a first working port A and a second working port B, the oil return port T is connected to the oil collecting groove through an oil discharge main pipeline, the first working port A is communicated with a closed piston cavity of the isolating valve, and the second working port B is communicated with an open piston cavity of the isolating valve; whether the isolating valve has an inner leakage fault or not can be quickly and conveniently determined by detecting whether the oil discharge main pipeline leaks oil or not.

A method includes opening a flow path from a gas stick through a variable orifice, a chamber, and an outlet isolation valve of the chamber. The method further includes causing a gas to flow through the flow path at a flow rate setpoint. The method further includes actuating an opening of the variable orifice to establish a choked pressure regime within the chamber, the choked pressure regime being achieved by causing a first pressure upstream of the variable orifice to be at least two times a second pressure downstream of the variable orifice. The method further includes closing the outlet isolation valve to cause the chamber to be filled with the gas from the gas stick. The method further includes measuring a pressure rate-of-rise within the chamber. The method further includes determining one or more flow measurements based at least in part on the pressure rate-of-rise.

The invention relates to the technical field of monocrystalline silicon manufacturing, in particular to a method for reducing crystal pulling power consumption of a single crystal furnace, which comprises the following steps: filling a cavity of the single crystal furnace with oxygen; an evacuating device at the bottom of the single crystal furnace is used for evacuating a cavity of the single crystal furnace, and a negative pressure state is formed in the cavity; after the single crystal furnace reaches vacuum, stopping the vacuumizing process, and performing leak detection on the cavity of the single crystal furnace by using an isolating valve; after leakage detection is completed, the single crystal furnace is filled with heat preservation gas; the heat preservation gas flows out through the gas guide hole 1 after passing through the heat preservation part in the circulation process. The cavity is formed in the furnace bottom and filled with the heat preservation gas, the filling gas replaces a traditional curing felt to serve as a heat preservation material, the heat preservation effect is better, pulverization is avoided, and the service life is longer. The bottom supporting point of the furnace bottom supporting device is made of a ceramic material, the strength of the ceramic supporting material is higher, and the problem that the crystal pulling quality is affected due to the fact that the strength of a traditional curing felt is reduced and the device cover distance is reduced in the high-temperature operation process of the single crystal furnace can be solved.

Thermogravimetric Reactor (TGR) and process to study weight change behavior of carbonaceous solids / catalysts during thermo-chemical reactions in gaseous environment up to the maximum operating temperature of 1000° C. and at atmospheric pressure are disclosed. The device includes a vertical tube reactor, digital weighing balance, gas feeding system equipped with volumetric flow controllers, rotameters, isolation valves and non-return valves to introduce inert and reactive gases and their mixtures to the reactor. It also has a movable electrical furnace heater for sudden heating / cooling of sample as per requirement. It also has sample feeding / loading system comprising containers of different sizes and shapes with a hanging arrangement There is arrangement to test the product gas composition with on line gas analyzer in the exit line or collecting the outgoing gas from the sampling port for off line gas analysis. The system also has control panel to store and display data including process parameters.

The invention belongs to the technical field of hydraulic systems, and particularly relates to an inner leakage diagnosis system and method based on a hydraulic system accident pressure distributing device. Based on a hydraulic system accident pressure distributing device inner leakage diagnosis system, a pressure oil tank is connected with a main pressure distributing system oil source pipeline, the main pressure distributing system oil source pipeline is sequentially connected with a main oil supply source valve, an isolation valve, a speed regulating system main distribution service valve and a main pressure distributing valve, and the main pressure distributing valve is connected with a first accident pressure distributing valve and a second accident pressure distributing valve through pipelines. The first emergency distributing valve is connected with a segmented closing valve through a pipeline; the device further comprises a first servomotor, a second servomotor and a control ring. The accident pressure distribution oil source pipeline is connected with a speed regulator accident oil source valve; the speed regulator control pipeline is connected with a speed regulator control oil source valve; the mechanical over-speed oil return pipe is connected with a sectional closing lock ingot over-speed oil return valve; and the mechanical over-speed oil supply pipe is connected with a sectional closing lock ingot over-speed control oil source valve. The invention provides a rapid inner leakage diagnosis system and method based on a hydraulic system accident pressure distribution device.

The utility model provides an ion implanter and a semiconductor processing system, and relates to the technical field of ion implanters. The ion implanter comprises a cavity, an exhaust pipeline, a one-way valve, an isolating valve and a tail gas treatment device, the cavity is communicated with the tail gas treatment device through the exhaust pipeline, and the one-way valve and the isolating valve are installed on the exhaust pipeline; wherein when the ion implanter is in an exhaust state, the isolation valve is conducted; when the suction force of the tail gas treatment device is greater than or equal to a threshold value, the one-way valve is switched on; when the suction force of the tail gas treatment device is smaller than a threshold value, the one-way valve is switched off; and when the ion implanter is in a non-exhaust state, the isolating valve is switched off. The ion implanter and the semiconductor processing system provided by the utility model have the advantage of being capable of effectively preventing waste gas from flowing back into the cavity.

The present invention discloses a main feedwater system for improving the water supply reliability of a high-temperature gas-cooled reactor steam generator, comprising a main feedwater pump and a high-pressure heater. The main feedwater pump comprises a first main feedwater pump, a second main feedwater pump, and a third main feedwater pump. The first main feedwater pump, the second main feedwater pump, and the third main feedwater pump supply water to two steam generators through a main pipe, and the feedwater flow rate of the steam generators is regulated by a main feedwater flow regulating valve of the steam generator. The present invention regulates the feedwater flow rate of the steam generator through the main feedwater flow regulating valve of the steam generator, and the speed of the main feedwater pump is only used as an auxiliary regulation method, so that no isolation valve and check valve are required between the outlet main pipe of the standby main feedwater pump and the operating main feedwater pump, thereby achieving the simultaneous connection of three main feedwater pumps to the outlet main pipe. When any two main feedwater pumps are in operation, the remaining main feedwater pump is on standby, thereby improving the water supply reliability of the main feedwater system and reducing unplanned reactor shutdowns.

A cryogenic liquid storage system comprising an outer tank 22, and an inner tank 24 configured to hold cryogenic liquid, an isolation valve 40, and a collection chamber 26, outside the outer tank, and

The utility model provides a steam turbine online cleaning system which comprises a main steam pipeline, a steam turbine, a condenser and a water spraying cooling device, a first isolation valve and a second isolation valve are sequentially arranged on the main steam pipeline in the steam flowing direction, the first isolation valve is connected with a first bypass pipeline in parallel, and a first bypass valve is arranged on the first bypass pipeline; the second isolating valve is connected with a second bypass pipeline in parallel, and a second bypass valve is arranged on the second bypass pipeline. The main steam pipeline is further provided with a first warm pipe emptying valve and a second warm pipe emptying valve. A heat preservation dismantling section is arranged on the portion, between the second isolating valve and the second warm pipe emptying valve, of the main steam pipeline, a water spraying opening of the water spraying cooling device is located over the heat preservation dismantling section, and a pipe wall remote transmission temperature measuring point and a main pipeline pressure sensor are arranged at the position behind the heat preservation dismantling section. Efficient online cleaning of the steam turbine is achieved.

The utility model discloses an isolating valve of a passive ventilation system of a nuclear power station, and belongs to the field of isolating valves. Comprising a valve body of a tubular structure; the valve plate is arranged in the valve body and used for opening and closing the valve body; the sealing piece is arranged at one end of the valve body and used for sealing the valve body and the valve plate; the valve rod is used for driving movement; the three-section type eccentric connecting rod structure is used for enabling the valve rod to drive the valve plate to translate along the center line of the valve body when the valve plate is opened and to turn to be parallel to the center line of the valve body after a certain distance is reached. The nuclear power station passive ventilation system isolation valve has the beneficial effect that the nuclear power station passive ventilation system isolation valve is provided.

This invention discloses an energy-saving and high-efficiency seawater flue gas desulfurization system and intelligent control method. The system includes a seawater supply unit, a desulfurization reaction unit, and an intelligent control unit. The seawater supply unit includes a seawater pool, a fixed-frequency pump, and a variable-frequency pump. Electric isolation valves are installed on the outlet pipes of the fixed-frequency pump and the variable-frequency pump. The desulfurization reaction unit includes an absorption tower with a single-layer spray layer inside, and the main outlet pipe is connected to the single-layer spray layer. The intelligent control unit is electrically connected to the fixed-frequency pump, the variable-frequency pump, and the electric isolation valve. It is used to monitor flue gas parameters and actual flow rate in real time, and dynamically adjust the frequency of the variable-frequency pump, the start and stop of the fixed-frequency pump, and the opening and closing of the electric isolation valve to match the water supply with the desulfurization load. This invention achieves continuous and precise flow rate regulation, significantly reducing energy consumption and investment costs.

The application belongs to the technical field of reactor thermal-hydraulic, and particularly relates to a test system for simulating passive safety injection pipeline rupture. The system comprises a full-pressure water replenishing tank simulation body and a break pipeline. The top of the full-pressure water replenishing tank simulation body is connected with a cold pipeline section of a pressure vessel simulation body through a balance pipeline, and the bottom of the full-pressure water replenishing tank simulation body is communicated with a descending ring cavity of the pressure vessel simulation body through a DVI main pipe. A first isolation valve is arranged on the balance pipeline. Both ends of the break pipeline are connected to both ends of the first isolation valve through a second isolation valve and a third isolation valve. A fourth isolation valve is arranged on the DVI main pipe. Both ends of the break pipeline are connected to both ends of the fourth isolation valve through a fifth isolation valve and a sixth isolation valve. At least one break simulation piece is connected in series on the break pipeline. The embodiment of the application can be used to carry out passive safety injection system response characteristic tests under the conditions of small break and double-end break in the balance pipe and the DVI pipe.