CN2196710Y

CN2196710Y - Automatic air-intaking exhaust valve

Info

Publication number: CN2196710Y
Application number: CN 94215655
Authority: CN
Inventors: 张其武
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-30
Filing date: 1994-06-30
Publication date: 1995-05-10
Anticipated expiration: 2004-06-30

Abstract

The utility model provides an automatic air intake and exhaust valve used for a Liquid transport pipeline under the pressure of 2.5 MPa, which is composed of a valve body, a main floating ball, and a subsidiary floating ball, wherein, the main floating ball is connected with a valve shaft through a lever, the upper part of the valve shaft is sheathed in a valve plate seat, and the upper part of the valve shaft, the valve plate seat, and a valve plate jointly control that an exhaust hole is opened or closed; the piston of the lower end of the valve shaft controls that the air intake is opened or closed, and the action of the piston is synchronous with the action of the valve plate. The air in a pipeline can be exhausted at any moment by the valve under the pressure of 2.5 MPa, when a pump is opened or repaired, the exhaust and air intake can be carried out for the pipeline without the manual operation, labor is saved, and water is saved. The utility model is suitable for the situation that the water seal is formed by the undulate height of the pipeline, and the air can not be exhausted form the end of the pipeline. The utility model is arranged on the peak of each water seal.

Description

Automatic air-intaking exhaust valve

The utility model belongs to a kind of valve class of water supply-drainage discipline, the automatic air intake-exhaust valve of especially a kind of liquid conducting pipes under 2.5MPa pressure.

The larger caliber outlet valve of Shi Yonging in the past, realize exhaust when all becoming in-service pipeline (being water-filling) by vacant duct, it but can't discharge the gas collection under the pipeline working state, and this is because ducted pressure difference is withstood the ball float in the outlet valve, and it can not be fallen by deadweight.For this reason in two ball outlet valves, very little with one of them vent design (as the two ball outlet valves of φ 100mm, the aperture of small de-air hole only is φ 0.5～φ 1mm), to reduce pressure difference, ball float can be fallen by deadweight, thereby be implemented in the exhaust purpose under the certain pressure, but when working pressure is higher in the pipe, at this moment the destructiveness of gas collection is also just bigger in the pipeline, exhausting problem also just more needs to solve, and the small de-air hole of above-mentioned pair of ball outlet valve is so for a short time to be the exhaust needs that can't satisfy pipeline.

The purpose of this utility model is to provide a kind of exhaust diameter bigger, and can be under 2.5MPa pressure, at any time the automatic air intake-exhaust valve of gas collection in the discharge conduit.

The purpose of this utility model is achieved through the following technical solutions: this automatic air intake-exhaust valve is made up of valve body, main ball float, secondary ball float, main ball float is connected with valve shaft by lever, the upper end of valve shaft has a shaft shoulder to be enclosed within the valve plate seat, the shaft shoulder can slide up and down certain distance in the valve plate seat, switch with control small de-air hole d1, the valve plate seat supports valve plate, valve plate is being controlled the switch of big exhaust port, the design of valve shaft lower end has piston, piston is being controlled the switch of big inlet hole, and synchronous with the valve plate action.

The major and minor ball float of this automatic air intake-exhaust valve is formed by top layer, internal layer, counterweight, and the top layer is a rubber, and internal layer is that two hollow semicircles are bonded together, and the centre is filled out with counterweight.

Automatic air intake-exhaust valve by such scheme manufactures and designs has following characteristics:

This valve can be under the pressure of Pg≤0.25MPa, and the air in the discharge conduit at any time in case gas collection blocking-up current and make and produce significantly compression shock in the pipeline reduce pipeline breaking and damage, reduces leak; During turn on pump, need not manually go pipeline exhaust along the line, saving of labor, water saving; When service conduits needs draining, need not manually open the valve air inlet, the air inlet automatically of this valve prevents vacuum phenomenon, makes draining unobstructed; This valve is applicable to the situation that the pipeline absolute altitude rise and fall to form water seal, air can not be discharged from pipe end, and this valve is installed on the peak of each water seal.

Accompanying drawing is a structural representation of the present utility model.

The utility model is described in further detail below in conjunction with drawings and Examples:

Be opening state for automatic air intake-exhaust valve small de-air hole d1 shown in the figure.

This embodiment is made up of valve body 1, main ball float 13, secondary ball float 15, main ball float 13 is connected with valve shaft 8 by lever 4, the upper end of valve shaft 8 has a shaft shoulder to be enclosed within the valve plate seat 9, the shaft shoulder can slide up and down certain distance in valve plate seat 9, with the switch of control small de-air hole d1, valve plate seat 9 is supporting valve plate 10, valve plate 10 is being controlled the switch of big exhaust port 12, the lower end design of valve shaft 8 has piston 2, piston 2 controlling the switch of big inlet hole 16, and synchronous with the action of valve plate 10.Wherein valve body 1 is welded into by steel pipe, side cover 7, two outlet pipes, and top cover all use bolt on valve body 1, be added with rubber seal 11 under the big outlet pipe; Piston chamber 3 in the valve body 1 is welded into by stainless steel, and with the contraposition of standard mandrel, makes it be welded on the appropriate location of valve body 1; Lever 4 is connected with valve shaft 8 usefulness Xiao Zi 5, Xiao's axle 6, piston 2, valve plate 10, valve plate seat 9 are all made with corrosion-resistant and antirust material, valve shaft 8 usefulness stainless steels are made, valve shaft 8 usefulness stainless steels are made, and big exhaust port 12, valve plate 10, valve plate seat 9, valve shaft 8, piston 2, big inlet hole 16 are all on an axisymmetric line; Major and

minor ball float

13,15 is formed by top layer, internal layer, counterweight, and the top layer is a rubber, and internal layer is that two hollow semicircles are bonded together, and the centre is filled out with counterweight, and the unit weight of whole ball is remained between the 0.85-0.90kg, for keeping little inlet hole d.Unobstructed, the corresponding section is provided with screw, can disclose out the obstruction of d. after dismantling; D1 area among the figure〉Σ d. area, purpose is in order to reduce the pressure of main float chamber 14, to guarantee the unlatching of valve plate 10.

The working procedure of this valve: this valve is before exhaust not, and main float chamber 14 has only aperture d.Air inlet; When air accumulates in main float chamber 14, main ball float 13 falls, driving valve shaft 8 by lever 4 moves downward, open d1 hole exhaust earlier, the pressure of main float chamber 14 is reduced, and then overcoming 10 exhausts of pressure reduction unlatching valve plate, valve shaft 8 drives pistons 2 and moves down and open air inlet macropore 16 simultaneously, thereby forms the exhaust passage greatly under the 2.5MPa pressure.

When being less than or equal to a standard atmospheric pressure, build up as air is arranged in the pipeline, main ball float 13, secondary ball float 15 fall, and realize automatic air intake-exhaust.

Claims

1, a kind of by valve body (1), main ball float (13), the automatic air intake-exhaust valve that secondary ball float (15) is formed, it is characterized in that main ball float (13) also is connected with valve shaft (8) by lever (4), the upper end of valve shaft (8) has a shaft shoulder to be enclosed within the valve plate seat (9), the shaft shoulder can slide up and down certain distance in valve plate seat (9), switch with control small de-air hole d1, valve plate seat (9) is supporting valve plate (10), valve plate (10) is being controlled the switch of big exhaust port (12), the lower end design of valve shaft (8) has piston (2), piston (2) is being controlled the switch of big inlet hole (16), and synchronous with the action of valve plate (10).

2, automatic air intake-exhaust valve according to claim 1 is characterized in that major and minor ball float (13), (15) by top layer, internal layer, counterweight composition, and the top layer is a rubber, and internal layer is that two hollow semicircles are bonded together, and the centre is filled out with counterweight.

3, automatic air intake-exhaust valve according to claim 1 is characterized in that big exhaust port (12), valve plate seat (9), valve plate (10), valve shaft (8), piston (2), big inlet hole (16) are all on an axisymmetric line.