CN2463626Y - Double-piston switching valve - Google Patents

Abstract

The utility model discloses a novel double-piston switching valve with two pistons. The utility model is used for places that medium flows in from one inlet and flows out from two outlets or any one of outlets. An inlet is arranged under the utility model, and two outlets are arranged above the utility model. Four valve collars and three lantern sleeves with through holes separate the utility model into 5 cavities. Through the mutually non-interference axial movement of the two pistons, the utility model achieves full opening, full closing or one opening and one closing. The valve collar is made of flexible and high-elastic material and metal reinforcement flexible graphite. The surface of the piston is hard and wear-resistant. The axial force is compressed by a valve cap, a gland screw bolt and a double disc-shaped spring cushion. The axial force causes the valve rings and the piston to tightly embrace when the valve rings and the piston pass through the cylindrical surface, and thus the utility model has the sealing function.

Description

The double-piston switching valve

The utility model relates to the piston valve that a kind of function has been expanded, and is to flow into medium by same inlet to flow out simultaneously or the piston valve of the applications that arbitrary outlet is flowed out from two outlets.

Task of the present utility model is the piston valve that a kind of " uniting two into one " will be provided, and its function is equivalent to two valves, but is better than two valves.This valve has an inlet, and two outlets are by mobile its standard-sized sheet, complete shut-down or the one open-one close of making of two pistons.Be specially adapted to respectively pacify the occasion of a safety valve, can guarantee arbitrary safety valve of verification at any time like this in two outlets, also can be to the verification simultaneously of two safety valves.

Task of the present utility model thinks that mode is finished down: double-piston switching valve valve body is oval tubular, and its below is inlet, and the top is two outlets side by side.The both sides of valve body are two valve gaps.By the spacer of four road valve collars, three band through holes, an inlet, two outlets are divided into 3 chambeies in the valve body, form other 2 chambeies, amount to 5 chambeies in end and two valve gaps.This valve has two pistons, and each piston all has two positions, and two pistons all have valve collar and its sealing when arbitrary position.By axial pressure valve collar and piston are closely held tightly plays seal action, each chamber is separated by cylinder.Be equipped with special spring washer under the two valve gap stud nuts, but the influence of its tension force absorption pressure, temperature change keeps impacting force, make sealing reliable, inside and outside leakage does not take place.Drive two pistons and move around and reach the purpose of standard-sized sheet, complete shut-down and one open-one close by rotating two handwheels.Other structure of valve is that valve rod, valve gap, handwheel, middle minute nut etc. are all identical with the pot type piston valve.Valve collar is soft and highly resilient material (enhancing Expanded graphite) arranged, and piston surperficial hard and wear-resisting is long to guarantee sealing Q-percentile life.This valve can drive with modes such as manual or pneumatic, electronic, hydraulic pressure.

Below with reference to accompanying drawing the utility model is described in further detail.

Fig. 1 is the sectional drawing of double-piston switching valve.

Oval tubular valve body (12) below (A) is a valve inlet, and top (B), (C) are two outlets.Valve body (12) both sides are valve gap (4-1), (4-2), are equipped with copper nut (5-1) on valve gap (4-1), (4-2), (5-2) matches with valve rod (3-1), (3-2).Three spacers (11-1), (11-2), (11-3) by four road valve collars (10-1), (10-2), (10-3), (10-4) and band through hole in the valve body (12) will enter the mouth (A) and export (B), export (C) and be divided into three chambeies; At end valve collar (10-1) and valve gap (4-1), form two other chamber between valve collar (10-4) and valve gap (4-2).Two pistons (9-1), (9-2) all have valve collar and its sealing when being in separately in two positions arbitrary position.Keep left right both sides valve gaps (4-1), (4-2) axial pressure make valve collar and piston closely hold tightly by cylinder to play seal action, can make each chamber separately.Be equipped with disk spring washer (7) under the stud nut (8) of valve gap (4-1), (4-2), but the influence of its tension force absorption pressure, temperature change keeps impacting force, make sealing reliable, inside and outside leakage does not take place.By middle minute nut (6-1), (6-2) piston (9-1), (9-2) are connected together with valve rod (3-1), (3-2); By self-locking nut (2-1), (2-2) handwheel (1-1), (1-2) and valve rod (3-1), (3-2) are connected together.Armrest wheel (1-1), (1-2) and valve rod (3-1), (3-2) rotation drive piston (9-1), (9-2) move axially and reach switching purposes: when piston (9-1) only moves to left and valve collar (10-1) when contacting, valve is opened gradually; In piston (9-1) moves to, divide nut (6-1) and valve gap (4-1) when contacting valve opened fully, promptly open the end of valve process.When piston (9-1) when moving to right valve closed gradually, when piston (9-1) moves to handwheel (1-1) and valve gap (4-1) when contacting, valve cuts out fully, promptly closes the valve process and finishes.In like manner right hand piston (9-2) moves axially the switching process that realizes right hand valve.Therefore two outlets (B), (C) can complete shut-downs under two pistons (9-1), (9-2) mutual noninterference mobile, standard-sized sheet or one open-one close.

This figure is depicted as manually-operated gate, by handwheel (1-1), (1-2) rotation valve rod (3-1), (3-2) piston (9-1), (9-2) is moved back and forth, and makes the double-piston switching valve reach complete shut-down, standard-sized sheet and one open-one close.This valve also can be made pneumatic, electronic and hydraulic control double-piston switching valve with pneumatic, electronic and hydraulic pressure installation actuate valve stem (3-1), (3-2).

The utility model can replace two valves, can guarantee that not only any communicates in inlet and two outlets, can also reach two purposes that export complete shut-downs or standard-sized sheet.This double-piston switching valve also possesses general piston valve and leaks, leaks outside in being difficult for and all advantages such as easy to maintenance.

Claims (3)

1, a kind of double-piston switching valve, it is characterized in that: its below (A) of long-round-shape valve body (12) is the inlet of valve, top (B), (C) be two outlets, pass through four road valve collars (10-1) in the valve body (12), (10-2), (10-3), (10-4) with three lantern covers (11-1) of being with through hole, (11-2), (11-3) will enter the mouth (A) and export (B), (C) be divided into three chambeies, at two ends valve collar (10-1), (10-4) with two valve gaps (4-1), form two other chamber, two pistons (9-1) (4-2), (9-2) be in arbitrary separately position valve collar and its sealing are all arranged.

2, according to the described double-piston switching valve of claim 1, it is characterized in that: two pistons (9-1), (9-2) are arranged in the valve body (12), reach the purpose of standard-sized sheet, complete shut-down and one open-one close by moving axially of two piston mutual noninterferences.

3,, it is characterized in that valve collar is soft and highly resilient material is arranged according to the described double-piston switching valve of claim 1---metal strengthens Expanded graphite, piston surperficial hard and wear-resisting.