17 results about "Zone valve" patented technology

The invention discloses a converter short-circuit fault positioning method and device based on a valve conduction state and a medium, and relates to the technical field of direct-current power grid control and protection. The method determines that a fault occurs in an alternating current side area, a valve body area or a direct current side area of the converter according to action conditions of valve short circuit protection and thyristor protection at different fault positions and three-phase current characteristics of the alternating current side of the converter, and determines whether the fault occurs or not according to a fault occurrence moment and a protection action moment. According to the method, the conduction state of the converter valve at the fault occurrence moment is determined, and the short-circuit fault of each converter valve in the converter valve body area is accurately positioned according to the conduction state of the converter valve at the fault occurrence moment, so that the positioning precision and the positioning feasibility of the short-circuit fault of the converter are improved based on the existing hardware.

The application discloses a hot-rolled strip coiling temperature control method and related equipment, and relates to the technical field of hot rolling. The method comprises the following steps: acquiring temperature data in the width direction of the strip; normalizing and polynomial fitting the temperature data to calculate a center point temperature value of the width of the strip; and adjusting the opening and closing state of a cooling zone valve based on the center point temperature value to control the coiling temperature of the strip. The application can more accurately reflect the actual temperature condition of the strip, effectively overcomes the problem that the traditional point-type pyrometer measurement is easily affected by the shape and surface of the strip and is distorted, and thus improves the mechanical properties and organizational properties of the strip and guarantees the product quality.

A gas and vacuum system is disclosed, and, in particular, an area valve service unit configured to provide local isolation of individual parts of a gas and vacuum system that may be required for installation, maintenance, or in the event of an emergency. The area valve service unit can have one or more shutoff valves, each of which has an associated access panel with a movable access panel door.

The solenoid valve has a sealing engagement portion having a first projection region (Q1) on a reference projection plane, a valve plug hole (521) having a second projection region (Q2) on a reference projection plane, and a portion of the valve plug (52) located between the sealing engagement portion and the valve plug hole (521) having a third projection region (Q3) on the reference projection plane, the third projection region (Q3) being located between the first projection region (Q1) and the second projection region (Q2), and when the movable core (51) and the valve plug (52) are sealed-engaged, the sealing engagement portion avoids the position of the valve plug hole (521) and relatively ensures the sealed engagement between the movable core (51) and the valve plug (52).

Valve train (10) for an internal combustion engine, comprising a first gas exchange valve (18), a second gas exchange valve (20), a first rocker arm (32) and a common valve bridge (42) for the gas exchange valves (18, 20), via which the gas exchange valves (18, 20) can be actuated by means of the first rocker arm (32) and thereby moved translationally in a first direction of movement (22), wherein the valve bridge (42) comprises: - a bridge actuation area (44) via which the valve bridge (42) can be actuated by means of the first rocker arm (32) and thereby moved translationally parallel to the first direction of movement (22), - a first valve actuation area (46) via which the first gas exchange valve (18) can be actuated by means of the valve bridge (42) by actuating the valve bridge (42), - a second valve actuation area (48) via which the second gas exchange valve (20) can be actuated by means of the valve bridge (42) by actuating the valve bridge (42), wherein the first valve actuation area (46) has a through-opening (56) which is continuous along the first actuation direction (22), - has a first length section (L1) in which the passage opening (56) is completely closed along its circumferential direction (58), and - has a second length section (L2) directly adjoining the first length section (L1) in the first actuation direction (22), in which the through-hole (56) is open at a first location (S1) along its circumferential direction (58) in a first opening direction (60) perpendicular to the actuation direction (22), wherein the second valve actuation area (48) has a groove (63) which is open at a second location (S2) in a second opening direction (64) perpendicular to the first actuation direction (22) and opposite to the first opening direction, wherein the groove (63) is completely closed in a second actuation direction (28) opposite to the first actuation direction (22), characterized in that a valve cap (68) is provided which is formed separately from the gas exchange valves (18, 20), from the rocker arm (32) and from the valve bridge (42),via which the first gas exchange valve (18) can be actuated by means of a second rocker arm (70) of the valve train (10), wherein: , - the valve bridge (42) and the valve cap (68) form a self-contained assembly (74) that can be mounted as a whole, in which the valve cap (68) is held on the valve bridge (42) independently of the gas exchange valves (18, 20) and independently of the rocker arms (32, 70); and / or - the open area (S1) in a second actuation direction (28) opposite to the first actuation direction (22) is covered by a collar (62) of the valve bridge (42) arranged in the first length region (L1), wherein the collar (62) has an extension (X1) extending along the first actuation direction (22), and wherein the valve bridge (42) is displaceable in the second direction of movement (28) opposite to the first actuation direction (22) relative to the gas exchange valves (18, 20), the valve cap (68) and the rocker arms (32, 70) into a disassembly position (D) in which, in the unactuated state, the rocker arms (32, 70) and the gas exchange valves (18, 20) are: ◯ the second gas exchange valve (20) is arranged completely outside the second valve actuation range (48), and ◯ a distance (X2) running along the first direction of actuation (22) between the second rocker arm (70) and the valve cap (68) remaining on the first gas exchange valve (18) when the valve bridge (42) is moved is greater than the extent (X1) of the collar (62).

The application provides a high-pressure compressed air foam fire extinguishing system for super high-rise buildings and an application method, wherein a high-pressure compressed air foam generating device is communicated with a high-pressure fire vertical pipe; the high-pressure fire vertical pipe is vertically arranged on an outer wall of the super high-rise building or in the super high-rise building, and is divided into a plurality of fire extinguishing sub-zones by setting sub-zone valves; a set of combined compressed air foam releasing device is arranged in each floor; a system controller is arranged in a fire control center of the super high-rise building, and remotely controls opening and closing of each sub-zone valve, opening and closing and opening degree of a foam flow distribution valve; the high-pressure compressed air foam generating device is provided with a central controller, and the central controller controls the air-liquid ratio of the foam to gradually increase with foam supply time; and the application can realize fire extinguishing and rescue for super high-rise buildings with a height of more than 200 m, building outer facades, curtain walls and other large fires, has high foam supply height, large flow, rapid response, strong fire extinguishing capacity, simple operation, safety and reliability.

The application relates to the field of valve boxes, in particular to a medical gas area valve box which comprises a first box body, a second box body, a window breaking mechanism and a collecting mechanism, a gas pipeline assembly is arranged on the first box body; the second box body is arranged on the first box body, a second box door, a side plate and a top plate are arranged on the second box body, the side plate is arranged on the two sides of the first box body, the top plate is arranged on the top of the first box body, the second box door is rotationally connected with the side plate, and the collecting mechanism is arranged at the bottom of the second box body; a second observation window, a second transparent panel and a second handle are arranged on the second box door, the second observation window is arranged in front of the corresponding gas pipeline assembly, the second transparent panel has three, and the second handle is arranged on one side of the second box door; a connecting arm and a rotating groove are arranged on the side plate, the rotating groove is arranged on the connecting arm, and the window breaking mechanism is rotationally connected with the rotating groove. The window breaking mechanism solves the problem that the staff finds hard objects and drags the emergency operation speed.

This utility model relates to the field of valve technology and provides a valve linkage device, including: a valve and a linkage mechanism. The valve is suitable for installation in a pipeline and is located in a first working chamber. The linkage mechanism includes a drive component and a linkage component. The drive component is installed in a second working chamber and includes a housing, a worm gear, and a worm wheel. The housing has an installation space and a first opening communicating with the installation space. The worm gear and the worm wheel are meshed and both are installed in the installation space. The first end of the worm gear passes through the first opening and is adapted to be connected to the valve stem of the valve via the linkage component. When the worm gear or the worm wheel is driven, the valve is opened or closed. Thus, by combining spatial isolation with mechanical transmission, both operator safety and reliable control of valves across different areas are ensured.

The utility model relates to vehicle technical field discloses integrated valve block and vehicle. Integrated valve block includes: valve block body, valve block body has first area, second area and third area, valve block body has high temperature flow path, high temperature valve interface, medium temperature flow path, medium temperature valve interface, low temperature flow path and low temperature valve interface, high temperature flow path and high temperature valve interface intercommunication and set up in first area, medium temperature flow path and medium temperature valve interface set up in third area, medium temperature valve interface and medium temperature flow path intercommunication, low temperature flow path and low temperature valve interface set up in second area, low temperature valve interface and low temperature flow path intercommunication. Will high temperature flow path and high temperature valve interface set up in integrated valve block's first area, will low temperature flow path and low temperature valve interface set up in second area, will medium temperature flow path and medium temperature valve interface set up in third area, carry out the district layout to different temperature's flow path and valve interface, reduce the heat transfer loss of fluid on the current -collecting valve block, and further improve the refrigeration heating efficiency of heat pump system.

The application discloses a trolley furnace cooling rate control device and a use method thereof, relates to the technical field of trolley heat treatment furnaces, and comprises a cooling air duct, a cooling air pipe, a controllable cooling zone valve, a cooling fan, a frequency converter and a thermocouple. The stable control of the cooling rate of the trolley furnace is realized by detecting the temperature through the thermocouple, obtaining the actual temperature difference with the trolley furnace temperature, and controlling the opening of the controllable cooling zone valve and the rotating speed of the cooling fan of the frequency converter in real time. Different cooling measures are taken for different temperature differences, the stable control of the cooling rate of the trolley furnace is ensured, the problem of uneven rate in the cooling process of the trolley furnace is solved, and the rate in the cooling process of the trolley furnace can be effectively controlled.

An in-floor pool cleaning system for controllably directing pressurized water from a pump to surface regions of a pool or spa. The system comprises a plurality of zone outlets each terminating at a nozzle disposed in a surface of the pool or spa and each controlled to an opened condition responsive to a control signal supplied to an associated zone valve. A controller supplying the control signals to each valve according to a schedule that sets forth the opened-state time, the closed-state time, and the opened state duration for each zone valve. The valves are individually controllable. A normally-opened bypass outlet is controllable to a closed state when one or more of the zone valves is in an opened state, and controllable to an opened state to supply water to the pool responsive to detection of a system over-pressurization or a system loss of power.

The invention discloses a mist zoning control valve box with an automatic drainage function, and belongs to the technical field related to fire fighting, the mist zoning control valve box comprises a valve box body, the interior of the valve box body is of a hollow structure, a control system comprises a zone valve box controller, a middle pipeline, a water inlet and outlet unit and a control unit, and the zone valve box controller is used for controlling the control unit. The control unit is installed outside the middle pipeline, and the bottom of the middle pipeline is connected with the water inlet and outlet unit. When an electric valve or an electromagnetic valve in the valve box breaks down to cause water flow leakage, low-pressure water flow can be drained through the high-low pressure automatic drainage assembly; the water is not sprayed from the water mist spray head, so that the protection area is prevented from being submerged by water due to wrong spraying, and the damage to equipment, personnel and property in the protection area is reduced. And low-pressure water flow is drained through the drainage device, so that the water loss can be effectively reduced, and equipment and facilities in the area are protected.

The utility model belongs to valve technical field, specifically is a kind of pipeline ball valve, including valve body, valve cover, valve rod, valve core and the connecting flange being arranged at the inlet and outlet of valve body, valve core top and valve rod are connected and both coaxial, valve rod is connected with external handle after passing through valve cover, cooling cavity is also equipped in valve body, cooling cavity covers the area where valve rod and valve core are located, cooling liquid inlet and cooling liquid outlet that communicate with cooling cavity are set up on valve body, the pipe diameter of cooling liquid inlet is greater than cooling liquid outlet, and the setting position of cooling liquid inlet is higher than cooling liquid outlet, the side close to valve core and valve rod in cooling cavity is equipped with fin, the inlet and outlet of valve body are all equipped with sealing ring extending into cooling cavity, disc spring that can push sealing ring against valve core is also terminated between connecting flange and sealing ring, the utility model realizes the synergistic effect of cooling and sealing function, adapts high temperature and high pressure working condition, effectively improves the working condition adaptability and service life of pipeline ball valve.

The invention relates to the technical field of fire fighting equipment, in particular to a safety strengthening type partition valve box for an offshore booster station. Comprising a box; a pipeline and an electric control box are arranged in the box body; a manual ball valve, a maintenance ball valve, a pressure gauge and an electric ball valve are sequentially arranged on the pipeline; the manual ball valve, the maintenance ball valve, the pressure gauge and the electric ball valve are all communicated with the pipeline; the electric ball valve, the manual ball valve and the maintenance ball valve are all connected with the electric control box; a mechanical emergency operation device communicated with the pipeline is arranged on the pipeline; the pressure gauge is connected with the electric control box through a pressure switch; a water drain valve is arranged on the pipeline; one end of the water drain valve is communicated with the pipeline, and the other end extends out of the box body; the manual ball valve, the maintenance ball valve and the electric ball valve are all connected with the test device; the fault rate of the system can be reduced, the overall safety and reliability of the system are improved, and stable operation of the offshore booster station pipeline system and safety of personnel and equipment are ensured.

A gas valve that includes a valve body that extends along an axis of the valve. The body has an internal valve seat. An outer surface of the body includes a break-away reduced diameter region that is located axially downstream of the seat. A valve shutter is movable along the axis within the body between a valve open position and a valve closed position. The valve shutter includes a central fluid channel extending along the axis and having a varying diameter along the axis. A sealing surface is located radially outward of the central fluid channel and engages the seat when the valve shutter is in the valve closed position. A radially-extending duct extends from a fluid inlet on an outer surface of the valve shutter to a fluid outlet to the central fluid channel. The valve shutter includes a further break-away reduced diameter region that is located axially downstream of the sealing surface.

The invention relates to a patient support (101), preferably a seat cushion, comprising a support area (1) with a base (2), a plurality of fluid cells (3) arranged on a seat side of the base (2), a pump (4), and a control unit (5), wherein one or more fluid cells (3) each define a pressure zone (6) and each pressure zone (6) is connected to the pump (4) by at least one zone valve (7), wherein each zone valve (7) can be actuated by the control unit (5), so that a pressure in each pressure zone (6) can be set by the control unit (5), characterized in that the patient support (101) comprises at least one pressure sensor (8) for measuring the pressure in at least one pressure zone (6), preferably at least one pressure sensor (8) per pressure zone (6).

The invention discloses a control method of a self-circulation drip irrigation system for indoor landscapes, which relates to the technical field of indoor irrigation control, and comprises the following steps of: executing active integrity self-inspection before irrigation: opening a normally-closed failure safety valve of a main pipe in a short time when a partition valve is closed, and driving a circulating pump to perform micro-pulse; collecting flow attenuation of the main pipe and liquid level stability of the main circulating box after the pump is stopped, and locking the machine if abnormal; irrigation is conducted after self-inspection is passed, the liquid supply volume is obtained according to the flow of a main pipe, the liquid level of a main circulation box is converted into box body volume change, the consistency difference value is calculated and compared with the short-time retention upper bound, and hard cutting is conducted if the consistency difference value exceeds the limit; during operation, a secondary safe liquid collecting cavity is triggered, conservation verification failure and flow abnormity are treated in a grading manner, and soft stop rechecking and locking are supported; and after locking, manual resetting is carried out, and fault positioning and learning mode updating are carried out, and a short-time retention upper bound and a partition flow window are output. According to the method, the water running stop loss certainty is improved, the false alarm and operation and maintenance cost is reduced, and maintenance is more convenient.