CN2409389Y - Three-position two-way piston valve - Google Patents

Abstract

The utility model discloses a three-position two-way piston valve with one inlet and two outlets. The utility model is used for the place that medium flows in from one inlet and flows out from one of two outlets. An inlet is arranged above the lower part of the utility model, and two outlets are arranged on the upper part of the utility model. Four valve rings and three partition sleeves with through holes separate the utility model into five cavities. A piston is position on the center of the utility model, and the two outlets are all closed. When the utility model lies in right stopping position, the left outlet is closed, and the right outlet is opened. When the utility model lies in left stopping position, the right outlet is closed, and the left outlet is opened. The valve ring is made of flexible and highly elastic material (reinforced flexible graphite). The surface of the piston is hard and wear-resistant. The axial force is compressed by a valve cap, a press cover 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

A kind of Three-piston two-way valves

The utility model relates to the piston valve that a kind of function has been expanded, particularly flow into medium by same inlet and must be from two outlets the piston valve of the applications of any outflow.

Existing above-mentioned occasion all is to connect two pipelines on the same storage, and valve of peace closes one of them on each pipeline, opens another, otherwise or, reach the purpose that must communicate with one of them.But be manually or automatic control all might slip up, occurs two and situation such as closes or open simultaneously simultaneously, in the industrial production application, above-mentioned error may produce significant problems such as safety, quality.

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, can avoid can not guaranteeing to have an outlet to flow out and the safety and the Accident due to quality of generation by artificial or automatic control error.This valve has an inlet, and two outlets are opened by the mobile one that makes of piston, and another is closed, otherwise or.Can prevent from like this to close, open the serious consequence that error brings, help manually or control automatically.Be specially adapted to respectively pacify the occasion of a safety valve, can guarantee that one one opens fully, be perfectly safe in two outlets; Also can be used for out one and be equipped with two pumps from production technology occasions such as same basin extraction materials.

Task of the present utility model thinks that mode is finished down: piston valve body is oval tubular, and its below is inlet, and the top is two outlets side by side.The left side of valve body is a gland, and the right side is a valve gap.By the spacers 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 in end and gland, valve gap, amount to 5 chambeies, all there were valve collar and its sealing in both sides when piston was in arbitrary position, three positions.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 valve gap and the gland stud nut, 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 piston and move around and reach three two logical purposes by rotating handwheel: when piston is in the position, middle, promptly held tightly by inlet both sides valve collar, inlet is neither logical with two outlets; When being held tightly by one of them outlet both sides valve collar, this port closing then, another port opening.Can be designed to left and right sides piston stop in design and open the position one or two for closing one, center position generally need not; If require the occasion that has two outlets to close on the production technology, can indicate relative position at this moment driving on valve rod that piston moves back and forth and the valve gap.Other structure of valve is that valve rod, valve gap, handwheel, stuffing box and stuffing box gland etc. are all identical with the pot type piston valve, only the valve rod lengthening.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 Three-piston two-way valves.

Oval tubular valve body (3) below (A) is a valve inlet, and top (B), (C) are two outlets.Valve body (3) left side is gland (2), and the right side is valve gap (19), has stuffing box (17) by stuffing box gland (18) it to be compressed on the valve gap (19); Being equipped with copper sheathing (20) on the valve gap (19) matches with valve rod (14).Three spacers (5), (7), (9) by four road valve collars (4), (6), (8), (13) and band through hole in the valve body (3) will enter the mouths (A) and export (B), export (C) and be divided into three chambeies; At end valve collar (4) and gland (2), form two other chamber between valve collar (13) and valve gap (19).All there were valve collar and its sealing in both sides when piston was in arbitrary position, three positions.Pressured lid (2), valve gap (19) axial pressure make valve collar and piston (10) closely hold tightly by cylinder and play seal action, can make each chamber separately.Be equipped with disk spring washer (15) under the stud nut (16) of valve gap (19) and gland (2) and (1), 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 opening nut (11) and not rotating disk (12) piston (10) and valve rod (14) are connected together; By nut (22) handwheel (21) and copper sheathing (20) are connected together.Drive piston (10) and move around and reach three two logical purposes by rotating handwheel (21): be spacing by the nut (23) on the valve rod (14), when piston (10) when being in left dead-centre position, piston (10) is exported (B) both sides valve collars (4) and (6) when holding tightly, then inlet (A) communicates with outlet (C), and outlet (B) is closed; When piston (10) when being in right dead-centre position, piston (10) export (C) both sides valve collars (8) and (13) when holding tightly, and then inlet (A) communicates with exporting (B), exports (C) and closes.Need be as production technology with two outlets (B) with (C) when closing simultaneously, piston (10) should be in center position, holds tightly with inlet (A) both sides valve collars (6) and (8), exports (B) at this moment and (C) closes simultaneously.

This figure is depicted as manually-operated gate, by handwheel (21) rotation valve rod (14) piston is moved back and forth, and reaches three (left stop, center, right stops) and two logical with outlet (B), logical with outlet (C) logical purposes.This valve also can be made pneumatic, electronic and the liquid Three-piston two-way valves with pneumatic, electronic and hydraulic pressure installation actuate valve stem (14).

The utility model can replace two valves, can guarantee that any communicates in entrance and two outlets, no matter be manually or from Move and can not slip up; If any specific (special) requirements, the scene 2 mouth is closed simultaneously. This Three-piston two-way valves also possesses general work All advantages such as leaking in plug valve is difficult for, leak outside and be easy to maintenance.

Claims (3)

1, a kind of Three-piston two-way valves is characterized in that: its below (A) of long-round-shape valve body (3) is the inlet of valve, and top (B), (C) are two outlets.Three spacers (5), (7), (9) by four road valve collars (4), (6), (8), (13) and band through hole in the valve body (3) will enter the mouths (A) and export (B), export (C) and be divided into three chambeies; At end valve collar (4) and gland (2), form two other chamber between valve collar (13) and valve gap (19).All there were valve collar and its sealing in both sides when piston was in arbitrary position, three positions.

2, according to the described Three-piston two-way valves of claim 1, it is characterized in that: be equipped with two disk spring washers (15) under the stud nut (16) of valve gap (19) and gland (2) and (1).

3,, it is characterized in that valve collar is soft and highly resilient material is arranged according to the described Three-piston two-way valves of claim 1---strengthen Expanded graphite, piston surperficial hard and wear-resisting.

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