摘要:
A butterfly valve of the type in which a valve stem is prevented from slide engagement with a valve seat is disclosed which assures more complete shaft sealing without causing any inconvenience to the controllability of the valve body and valve stem and can thus advantageously prevent fluid from leaking outwardly of a valve casing. A drive shaft rotatable and reciprocatable in longitudunal directions of the valve stem is connected to an outer end of the valve stem. The valve casing extends so as to cover the drive shaft, and a packing member is disposed between the valve casing and the drive shaft to provide a shaft seal for the drive shaft. The rotation of and reciprocating movement of the drive shaft connected to the butterfly valve are performed by a simple drive mechanism. That is, the rotation of and the reciprocarion of the drive shaft are accomplished only through rotation of a control shaft.
摘要:
Bei einem Absperrorgan mit einem in einer Rohrleitung einbaubaren Rohrgehäuse und einer Drehklappe, für die eine das Gehäuse durchsetzende Antriebswelle und ein Sitz im Gehäuse vorgesehen ist, wobei auf der Antriebswelle (10) eine Ringscheibe (11) mit Loslagern (7, 8) angeordnet und die Ventilklappe (3) in der Ringscheibe (4) geführt, sowie mit der Antriebswelle durch ein Getriebe (22, 23) verbunden ist, welches beim Einschwenken der Ventilklappe (3) gehemmt ist und zum Anpressen der Ventilklappe (3) auf ihren Sitz (32) dient, ist erfindungsgemäß vorgesehen, daß das Getriebe (22, 23) bei Rückdrehung der Antriebswelle (10) die Ventilklappe (3) axial vom Sitz (2) abhebt, bis diese auf der Ringscheibe (4) abgestützt ist, und daß das Getriebe (22, 23) die Verbindung der Ventilklappe (3) mit der Antriebswellebildet, wobei sich die Ventilklappe (3) auf der Ringscheibe (11) abstützt.
摘要:
A frictionless rotary valve comprising: a valve body to be connected within a gas meter, the valve body comprising: a seal, fixedly attached near an outlet of the valve body; and a valve disc, having a ball bearing attached to the valve body; and a gear mechanism comprising: a worm wheel engaged with a worm, wherein the worm wheel is attached to a second end of the valve disc; a drive gear connected to the worm, wherein a rotation of the drive gear in a clockwise direction rotates the worm wheel in an anti-clockwise and moves the valve disc in a closed position; a worm wheel stop, for restricting a movement of the worm wheel in the anti-clockwise direction and driving the worm wheel in a vertically upward direction; and a linear guide attached to the worm wheel.
摘要:
A production method is a method for producing trichlorosilane, the method including opening and closing, with use of a non-sliding valve (b1 to b4), an entry channel (f1), an exit channel (f2), a discharge channel (f31), and a discharge channel (f32) through each of which metallurgical grade silicon powder flows in a system for producing the trichlorosilane, the non-sliding valve including a valve body capable of being rotated without coming into contact with a valve seat.
摘要:
The present application discloses a valve comprising: a housing; at least one valve body disposed in the housing, the at least one valve body being rotatable in the housing; and at least one sealing element provided between the housing and the at least one valve body; at least one lifting structure configured to move the at least one sealing element upward and downward relative to the housing or the at least one valve body to adjust the relative distance between the at least one sealing element and the housing/the at least one valve body; wherein when the at least one valve body rotates, the at least one sealing element at least partially leaves the housing or the at least one valve body, so that the driving force required to rotate the valve body can be reduced.