CN2095974U

CN2095974U - Two-position valve

Info

Publication number: CN2095974U
Application number: CN 90223106
Authority: CN
Inventors: 黄书彬
Original assignee: WUHU FIRE-EXTINGUISHING APPARATUS FACTORY
Current assignee: WUHU FIRE-EXTINGUISHING APPARATUS FACTORY
Priority date: 1990-11-02
Filing date: 1990-11-02
Publication date: 1992-02-12

Abstract

The utility model discloses a two-position valve device comprising a valve seat provided with pressurization holes, decompression holes and guiding holes, a valve guiding rod which is in the sliding assembly with the valve seat and common key switches, wherein, the valve guiding rod can satisfy two operating statuses by utilizing the self geometrical structure, and the key switches drive the valve guiding rod to change the position. The decompression holes and the guiding holes are opened simultaneously with the closing of the pressurization holes, or the decompression holes are closed simultaneously with the conduction of the pressurization holes and the guiding holes; the two-position operating status can be quickly and effectively switched by opening and closing through the pressure difference of the inner cavity and the outer cavity of the valve body, and the common phenomenon of the corrosion of the valve body and the easy ' seizure' of the mechanism can be completely overcome. The utility model which is easy to manufacture has the advantages that the requirement to the process precision is low; the processing cost which is 20% to 30% lower than the processing cost of a common ball valve and a stop valve is 40% to 50% lower than the processing cost of an electromagnetic reversing valve.

Description

Two-position valve

The utility model relates to a kind of various working mediums that can form certain working pressure that are applicable to, as vapour, water, oil or other equivalents, can open and close the valve means of two operating movements quickly and efficiently.

Various working mediums, as vapour, water, oil or other equivalents, under the certain working pressure state, need finish the valve means that opens and closes two operating movements, all be to realize its work purpose with those skilled in the art were familiar with in the art all kinds of stop valves, ball valve, solenoid directional control valve.And for using up in the short time, realize conversion of operation state effectively, more than common valve body then tend to since work parts oxidation corrosion, parts use wearing and tearing and assemble perfect not to the utmost, structure is too complicated and have or occur the phenomenon that mechanism " kills " and the working state conversion is relatively more difficult, is difficult to satisfy the real work needs.

The purpose of this utility model is at above-mentioned deficiency, proposes pressure reduction principle in a kind of utilization, realizes opening and closing the valve means of two operating movements fast, effectively and deftly.

The purpose of this utility model is achieved in that in a two-position valve body, is furnished with a special-purpose cylinder body that is slidingly matched with valve body, a kind of relief hole that communicates with the valve body exocoel that has, the valve seat of pressurized hole and the pilot hole that communicates with the valve body inner chamber connects with valve body is fastening, and be equipped with the pilot stem that can satisfy the function needs, by general common key switch, drive the evolution of pilot stem, change the working state of pressurized hole and relief hole, under certain working pressure effect, utilize the inside and outside cavity pressure of valve body poor, driven plunger formula main valve opens effectively, two motions of valve, the conducting of the medium of finishing the work and ending.

Compared with prior art, the utlity model has following advantage: (1) this valve body can be changed effectively in 1 second in less than and open and close two working staties, and common, but needs long conversion time as lead screw type stop valve, ball valve; (2) this valve body only needs a light finger to press, execution conversion exactly, and common need the big strength of human to finish conversion by handle with sleeve as lead screw type stop valve, ball valve; (3) this valve body can not occur because the parts corrosion, wearing and tearing and phenomenon " is killed " by the mechanism that causes; (4) this valve body is made easyly, and requirement on machining accuracy is low, and manufacture cost will reduce by 20～30% than common stop valve, ball valve.Reduce by 40～50% than solenoid directional control valve.

Fig. 1, Fig. 2 are according to the Two-position valve section of structure that the utility model proposes.

Concrete structure and working condition that fire-fighting water knockout drum embodiment explanation in conjunction with the accompanying drawings the utility model proposes.

This valve body mainly comprises common key switch 1, button 2, button 3, pilot stem 4, the valve seat 8 that has pressurized hole 5, relief hole 6, pilot hole 7, two-position valve body 9, piston type main valve 10, special-purpose cylinder body 11, main spring 12.

Press knob down 2, in the pressurized hole 5 of pilot stem 4 on closing valve seat 8, relief hole 6 is opened, the beginning pressure release also communicates with pilot hole 7, at this moment, the import medium is closed owing to pressurized hole 5, no longer the valve body inner chamber there is pressure, and there is working medium pressure all the time in the valve body exocoel, and under the pressure difference effect in the inside and outside chamber of valve body, actuating valve body 9 left end piston type main valves 10 move to right, synchronous therewith, the former working medium of depositing of valve body inner chamber is drained by the relief hole 6 and the pilot hole 7 that communicate with the valve body exocoel, and two-position valve body 9 port openings are realized conducting.Main spring 12 plays the effect of the mobile main valve 10 of steady buffering.

Press knob down 3, pilot stem 4 is when opening pressurized hole 5, the group's of closing relief hole 6, the working medium that pressure is arranged is by pressurized hole 5, pilot hole 7, flow in the special-purpose cylinder body 11 of valve body inner chamber, this moment, piston type main valve 10 inner cavity surface were born pressure and its external cavity surface pressure, also had valve body 9 inlet's pressure all to equate.Because piston type main valve 10 inner face bearing areas are more significantly greater than the outside bearing area, thus interior surface pressure obviously greater than outer surface pressure, 10 of piston type main valves close tightly two-position valve body 9 outlet steps 13, realize the blocking-up of working medium.

The Two-position valve that the utility model proposes can also carry out multiple commutation, shunting combination, forms the two combined type operation mechanisms that pass to.

Claims

1, a kind of valve means that is applicable to two operating movements of the various working mediums that can form working pressure.This device by pilot stem 4, have pressurized hole 5, the valve seat 8 of relief hole 6, pilot hole 7, two-position valve body 9, piston type main valve 10, the special-purpose body of rod 11 and common key switch 1 are formed, it is characterized in that: with the two-position valve body 9 fastening valve seats that connect 8, be processed with three not pressurized hole 5, relief hole 6, the pilot holes 7 of same-action, pressurized hole 5 and relief hole 6 communicate with the valve body exocoel, and pilot hole 7 communicates with the valve body inner chamber.

2, it is characterized in that according to the described valve means of claim 1: pilot stem 4 and valve seat 8 slidable fit.

3, according to the described valve means of claim 1, it is characterized in that: special-purpose cylinder body 11 is slidingly matched with valve body 9.