CN2258557Y - Double full sealing stop valve - Google Patents

Abstract

The utility model provides a double full sealing stop valve. On the basis of an original full sealing stop valve, the contact surface of the inner lower part of a valve cover with a bowl-shaped sealing ring is designed to form an arc shape which is just consistent with the bowl-shaped sealing ring; a piston block is upwards lifted to the edge of an inner cavity of a valve shell, flow quantity can be increased, and liquid pressure can be improved; in addition, a gap between a piston and the wall can be blocked by the piston, the condition that liquid pressure acts on a rubber bowl for a long time in the process that the stop valve works is cancelled, and the whole service life of the stop valve and the sealing reliability are improved; simultaneously, the sealing ring of which the cross section forms a circular shape is used, and the sealing property can be better.

Description

The sealed stop valve of enjoying a double blessing

The utility model relates to a kind of valve, especially a kind of sealed stop valve of enjoying a double blessing.

Existing stop valve sealing means normally adopts rotary screw part asbestos rope as sealing material, because asbestos rope is easy to wear, often causes seepage.And the stop valve that has can not be opened fully, has reduced the flow of valve, and is gapped between piston and wall simultaneously, causes hydrodynamic pressure often to act on rubber cup; And there is a space at the rear of rubber cup, and leather cup is heaved under pressure, and long duration of action can make the rubber cup fatigue deformation, reduces the life-span, or the breakdown seal action that loses.

It is lightly flexible that the purpose of this utility model provides a kind of switch, reliability height, hermetically sealed, as not have leakage, the long service life sealed stop valve of enjoying a double blessing.

The utility model improves on the basis of existing hermetically sealed stop valve, mainly is made up of valve body, valve gap, handle, screw rod, piston block and seal arrangement.Below in the valve gap is designed to arc with bowl seal circle surface of contact, and just consistent with the bowl seal loop-shaped, piston block is upwards carried the edge to valve shell cavity, and makes piston shut gap with wall, and adopting cross section simultaneously is circular O-ring seal.

Originally enjoy a double blessing sealed stop valve owing to removed the space at rubber cup rear, make clamping cap inwall image consistent, to transmit the leather cup pressure, the working life of improving rubber cup with the rubber cup profile.It is circular annular rubber ring that seal ring adopts the cross section, is characterized in that pressure is more closely knit, good seal performance, and adapt to the high pressure use.To carry on the piston block simultaneously, valve is opened entirely, both augmented flow, also can improve the pressure of fluid, and can shut the gap of piston and wall after opening entirely, remove from hydrodynamic pressure at stop valve duration of work long term in rubber cup, improved the reliability of stop valve bulk life time and sealing.

The utility model is applicable to chemical industry, oil, agricultural chemicals, pharmacy, sugaring, chemical fertilizer, industry-by-industry such as civilian.

Be described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural representation.

The utility model valve has a screw rod 3, but buckle is the handle 2 of a turn screw rod 3 in upper end, screw rod 3 back, and handle 2 usefulness bolts 1 compress.Screw rod 3 screws in the valve gap along valve gap 4, the seal arrangement of valve is made up of the bowl seal circle made from special rubber materials 6, O-ring seal 9, piston block 7 and seal ring hold-down bolt 5 and 10, after in seal arrangement places valve body 8, with valve gap 4 bowl seal circle 6 is pressed in valve body 8 inner chambers, because the cross section of rubber seal is circular, press down distortion at valve gap, the very closely knit gap of shutting valve body and valve gap, the liquid of stopping to have certain pressure releases from the handle of valve.The valve gap cavity shape is consistent with the profile of bowl seal circle; valve is opened and closed in the process; transfer function is in the part hydrodynamic pressure of bowl seal circle; simultaneously after valve is opened entirely; the seal ring 9 of piston can be shut liquid and enter the seal arrangement inner chamber; when removing valve open work from, the fluid pressure long duration of action is in bowl seal circle inwall, thus the life-span of protection and prolongation seal ring.

Packed-piston turns clockwise at screw rod 3 and promotes to make the seal ring 9 closely knit liquid-inlets of shutting downwards, and valve is by work.When being rotated counterclockwise handle 2, by the pressure of valve body medium and the restoring force of bowl-shape rubber seal, packed-piston 7 moves up, and valve is promptly opened.So just, realized hermetically sealed, leak free stop valve up and down.

Claims (1)

1, a kind of sealed stop valve of enjoying a double blessing, handle 2 is fixed on screw rod 3 tops, and screw rod screws in the valve gap from valve gap 4 tops, it is characterized in that:

The below is an arc with bowl seal circle 6 surface of contact in a, the valve gap 4, and is just consistent with the bowl seal loop-shaped;

B, piston block 7 are upwards carried the edge to valve shell cavity, and make piston shut gap with wall;

The cross section of c, seal ring 9 is circular.

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