摘要:
The present invention provides a slurry-transporting facility equipped with a plurality of pump-equipment circuits, whereby a stop of slurry supply to a transport destination at the time of switchover between the pump-equipment circuits for use is prevented to make an efficient operation possible. The slurry-transporting facility includes: pipe arrangements 11 which branch out from a feed tank into the plurality of circuits; a transport pump 12 provided in each of the pipe arrangements 11; a first valve 13 provided upstream from the transport pump 12; a second valve 14 provided downstream from the transport pump 12; and a uniting pipe arrangement 16 formed by joining of the pipe arrangements 11 at a predetermined position and connected to a LT heater 2. The uniting pipe arrangement 16 is provided with a third valve 17 configured to control the transportation of ore slurry to the LT heater 2 and a pressure gauge 18 configured to measure a pressure in the uniting pipe arrangement 16. Furthermore, the pipe arrangement 11 in each of the circuits is provided with a pressure gauge 20 at a position downstream from the transport pump 12 and upstream from the second valve 14.
摘要:
A micromechanical pressure relief valve arrangement (10) comprises a stack of wafers (13). An active pressure relief valve (20) is realized within the stack of wafers (13). A passive pressure relief valve (30) is also realized within said stack of wafers (13), arranged in parallel to the active pressure relief valve (20). A check valve (50), also realized within the stack of wafers (13), is arranged in series with both the active pressure relief valve (20) and the passive pressure relief valve (30).
摘要:
A system for protecting piping downstream of a wellhead includes an inlet connected to the wellhead and an outlet connected to downstream piping. Two sets of series-connected surface safety valves are in a parallel fluid flow relation to each other and in fluid communication with the inlet. Two vent control valves, which are in fluid communication with each other, each of the two series-connected safety valves and the inlet and outlet of the system, are intermediately connected to the safety valves. Each vent control valve is in fluid communication with a vent line for venting process pressure between surface safety valves through the outlet control valve based on a signal-generating safety logic solver having preprogrammed safety and operational protocols and pressure sensing transmitters attached upstream of the outlet control valve Independent, tight shut-off tests of each series-connected surface safety valve set closes all valves upon electrical or hydraulic failure.
摘要:
An air intake device for an engine is provided in which a bypass valve (V) is formed from a tubular valve chamber (15) having its interior opening on the upstream side of a bypass (20) and having an inner face with a metering hole (16) opening toward the downstream side of the bypass (20), and a valve body (25) that is slidably but non-rotatably fitted into the valve chamber (15) and that opens and closes the metering hole (16), wherein the valve chamber (15) and the metering hole (16) are formed in a bypass valve holder (10) provided so as to be connected to a throttle body (1), and a dividing wall (17) that divides the metering hole (16) into a plurality of small metering holes (16a, 16b) arranged in the peripheral direction of the valve chamber (15) is formed in the bypass valve holder (10) so as to be continuous with an inner peripheral face of the valve chamber (15). This can prevent any hindrance to the closing movement of the valve body of the bypass valve even when a large metering hole is employed.
摘要:
The aim of the invention is to provide a gas pressure regulator which functions with repetitive accuracy even with the smallest possible throughputs and which simultaneously maintains a zero cut-off. In addition, the invention should allow gas burners which are operated within a wide modulation range to be ignited, while keeping the internal pressure loss as minimal as possible. The production costs and the number of sealing points should also be as low as possible. To achieve these aims, the chamber (19) on the inlet side and the chamber on the outlet side (22) of the gas pressure regulator, together with the passage that is available for regulating the pressure, are also connected by one or several separate openings (34) which respectively form a seat (35) for a closure body (33) that is allocated to said openings and that is displaced in an axial direction against the seat. Said closure body is, in turn, connected to an armature (31) of a solenoid valve. The gas pressure regulator, which regulates the initial pressure in a gas line that supplies a gas burner, can also feed the gas burner the required initial quantity of gas for ignition.
摘要:
The invention relates to an electromagnetic valve, comprising a valve housing (9) in which a valve tappet (8) is arranged in such a way that it is axially mobile, a magnet armature (11) to which said valve tappet (8) is fixed and a valve piston (7) which can also move axially in the valve housing (9). An orifice-shaped passage (3) which is opened and closed by the valve tappet (8) is provided in the valve piston (7) for pressure media. Another, throttle-free pressure media passage (4) which is opened and closed by the valve piston (7) is located between the valve piston (7) and the valve housing (9). Pressure media channels (1, 2) run into the valve housing (9) on both sides of the valve piston (7). Both pressure media passages (1, 2) are closed in the basic position of the electromagnetic valve. The valve piston (7) only opens up the other, throttle-free pressure media passage (4) when the hydraulic pressure acting on the valve piston (7) in the valve closing direction is less than the pressure of a spring (10) mounted on the valve piston (7), said spring acting in the opening direction of the valve, and when the pressure media passage (3) in the valve piston (7) is opened up as a result of the electromagnetic excitation of the valve by the valve tappet (8).
摘要:
A directional flow control valve (12) is provided which achieves the function of a two-position, three-way directional control valve and functions at high pressures with low leakage rates. In addition, the valve provides a cost effective and simplified configuration to additionally achieve the functions of a free-flowing forward check valve (38) and a high pressure relief valve (19,50) integrated with the directional control valve. The invention is directed towards providing a valve with low cost and a minimum penalty with regards to electrical power consumption.
摘要:
Improved idle purging is obtained in a regulated canister purge solenoid valve (36) by communicating the atmospheric chamber space of the regulator mechanism to atmosphere through the canister (16) and providing in the movable wall (92) of the regulator mechanism an orifice (88) which is closed by abutment of a surrounding portion (94) of the movable wall (92) with an internal surface of the atmospheric chamber space when the engine is off, but is opened when that surrounding portion of the movable wall leaves that internal surface of the atmospheric chamber space upon engine running.
摘要:
On obtient une meilleure purge au ralenti dans une électrovanne (36) de purge de boîte métallique régulée par mise en communication de l'espace de la chambre atmosphérique du mécanisme régulateur avec l'atmosphère par l'intermédiaire de la boîte métallique (16), et par disposition dans la paroi mobile (92) du mécanisme régulateur d'un orifice (88) fermé par aboutement d'une partie périphérique (94) de la paroi mobile (92) avec une surface interne de l'espace de la chambre atmosphérique lorsque le moteur est coupé, mais ouvert lorsque cette partie périphérique de la paroi mobile quitte cette surface interne de l'espace de la chambre atmosphérique lorsque le moteur tourne.