DE2047815A1 - Vent valve - Google Patents

Description

The invention relates to vent valves used for this purpose remove air from lines that carry liquids such as water, chemicals or cigl., and hereinafter referred to as water pipes.

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Air in water pipes can cause water hammer and is a major hazard because if the air collects and is compressed by the water, it can reach a pressure high enough to burst a pipe. Since such air is usually present in pipelines , it is the job of a vent valve to release this air without allowing water to escape. Furthermore, such valves have the task of filling the pipelines with air when the water

SADOfflötNAL

2098U / 0751

should be evacuated from them in order to prevent a vacuum from being created in them, which would cause the Can result in lines.

There are two types of vent valves, ciie common drawn as "kinetic" and as "automatic" and used to fulfill «these tasks. The kinetic valve is actuated when water first is fed into the pipes and releases large amounts of air in a short period of time, and then remains closed as long as the tube is filled with rfasser remain. The automatic valve is always operated when "the pipe is filled with water and sets in at one." certain air pressure releases small amounts of air that has accumulated, whereupon it closes again automatically. The automatic valve is a safety valve to ensure the release of air when the kinetic Valve is closed and always comes into action when there is pressure in the lines.

Both the kinetic and the automatic valves use floats in the form of large nonles Metal balls, in particular aluminum balls, covered by a layer "of rubber or a similar material and form the closure member, the kinetic valve having a valve opening and a valve seat of large diameter, while the automatic valve has only one small opening and one small one Has seat.

Both valves have large dimensions in order to be able to use large ball floats which are necessary for proper buoyancy, and both valves are necessary because each of them has a different function for releasing air from a pipe

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2098U / 07S1

Has. She. are built as a separate valve unit and are either switched separately to the di · = · line or they are installed in series in such a way that the automatic valve is on upper end of the kinetic valve is located, or they are arranged in parallel, at v / elcher both valves are built into a large housing adjacent to one another.

The construction of both valves and especially the cost of making the rubber coated metal balls are very high.

The object of the invention is to provide a vent valve which is at a lower cost than before valves in use can be built, and that due to its design, if desired, enables the float of the kinetic valve forms the housing for the automatic valve.

The invention consists in a vent valve and differs from the known valves in that the float is bell-shaped.

The invention is illustrated, for example, in the accompanying drawings, namely show:

1 shows a view in vertical section of a kinetic vent valve according to the invention;

2 is a view in vertical section of a combined kinetic and automatic vent valve according to the invention;

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291/70 M-

Fig. 3 is a view in vertical section of an automatic vent valve when this as separate unit is used.

The kinetic vent valve shown in FIG has_a bell-shaped float 1, which runs lengthways, a number of vertical ribs 2 is vertically movable, which at equal radial distances to the walls of a cup-shaped cage's 3 are formed, the lower one End 4 is pointed. On the walls of the cage 3 is a number of webs 5 formed with equal radial distances, which are firmly held in the valve housing, which is formed by a lower part 6 and an upper part 7. The lower part 6 is funnel-shaped and has an axially extending shaft 8 which has an external thread 8 'for installation in the water pipe (not shown) is provided.

The upper end of the lower part 6 is provided with an internal thread 9 through which it can be screwed to the lower part of the upper part 7, a sealing ring 9 'being arranged in an annular groove in the lower edge of the upper part 7 to ensure a balanced seal . A large, axially arranged outlet opening 10 is provided at the upper end of the Oosparts 7 and a seal, 11 od rubber Seat for the float 1 can serve, where the seal 11 is held by a screw-in ^{ring II 1} '..' ird. If desired, the seal 11 can be attached to the top of the float la so that the wall around the opening 10 forms the valve seat. The üff-

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Nung 10 is resistant to large objects and dirt an umbrella-like cover 12 'protected with a downwardly directed annular inner flange 13 is formed, through which the cover with the upper End of the upper part 7 'can be screwed and which has several cutouts 14 at equal radial distances so that the air can escape. .A nut attached to the top "of the cover 12 makes it easier the attachment to the valve housing.

When the symmetrical valve described above is not in use, the float 1 rests on ribs 16, which are provided on the inside of the cage 3. If the pipeline is now filled with water, Large amounts of air flow at the tip H of the cage 3, which is provided to prevent the float from being carried along by the air flow, and the valve

- is closed prematurely, furthermore via the vertical walls of the latter in order to exit through the opening 10. After all the air has escaped, water flows. at cage 3 past its outer side as well as through the. Opening 25, which is provided in the cage, and fills its interior, with the result that the float ¹ 1 a buoyancy is effective, and this is pressed against the seal 11 to close the opening 10 'and the outflow of Prevent water. The closer the pressure of the water in the line, the greater the pressure of the float against the seal. Only when the line is empty of water, the valve opens again. *

In Fig. 2 a combined kinetic and automatic valve is shown, the parts which are the same as in Fig. 1 are denoted by the same reference numerals and no additional description is required.

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require, while the parts that have the same function as those in Fig. 1, but slightly different formed sine, with the same reference number, however with the addition of the letter "a".

The float la of the kinetic valve sits in Fig. 2 shows the valve opening 17 of the automatic valve. The opening 17 has a very small diameter and extends axially through a nipple Ib, egg on the Inside of the float la is formed and the valve seat for a plug 19 'made of rubber od. Like. which is inserted into the top of a bell-shaped "float 19 of the automatic valve. On the inside of the shimmer la is a number of vertical ribs 20 with the same radial distances to Guide the vertical movement of the float 19 molded, while the upper end of the float la with a, upwardly extending annular flange 21 of smaller outer diameter than the opening 10 is formed. The inside of the flange 21 is covered by a screw cap 22 inserted therein, with a space 2 3 is left between the upper end of the opening 17 and the cap 2 2 and a laterally extending narrow Bore 24 the connection between the space 2 3 and the Creates atmosphere.

The combined kinetic and automatic valve shown in FIG. 2 and described above operates as follows: when water begins to fill the main line (not shown), air immediately flows to the vertical one Walls of the cage'3 and through the opening 10. If now water begins to enter the valve, · it flows through the openings 25 into the cage 3 and divides the float 19 with a buoyancy, whereby the uff-

2098U / 0751 8ADOR ₁ QtNAL

tion 17 is closed. At the same time the "buoyancy of the float la begins, so that this cit opening 10 closes. When air in the water begins to flow into the valve, it displaces the water, " so that the float 19 is in an air pocket and falls down so that the air through the opening 17 can escape.

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When all "this air through the opening 17, the room 2 3 and the hole 24 has escaped, the float becomes 19-again a buoyancy communicated by the inflowing water, with the result that the plug 19 'against the seat 18 is pressed on in order to close the opening 17.

The float la is only lifted from its seat 10 during the automatic operation of the float 19, when the water pipe is emptied, since it is in its closed position either through the water or is kept within the same by the air pressure.

The \ & itil shown in Fig. 3 is only an automatic one Valve and differs from the automatic valve described in connection with FIG in that the float Ib now serves as the upper part of the housing and with a funnel-shaped lower part 27 is screwed, which can be connected to the water pipe. How this automatic valve works is analogous to that of the valve according to FIG. 2.

The parts of the valves described above can be made of a suitable plastic or metal will. Since most parts are suitable for mass production, the costs of the Gesantventils are senr

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low. '

If desired, you can add to the combined valve Fig. 2, the bell-shaped float 19 can be replaced by the known hollow ball float.

~ ^b "SADORtQrNAL 2.0 98 U / 075 1

Claims (1)

91/70 3 September 29, 1970 Patent claims before: 1.) Vent valve, characterized in that the float is bell-shaped. 2. vent valve according to claim 1, if this forms a kinetic valve of the type characterized above, characterized in that the Swimmer moving vertically through ribs is carried out, which is attached to a cup-shaped Xäfig are formed, which is inserted into a housing, which at its lower end with the liquid line can be connected and has a large outlet opening at its upper end, with a Ring made of rubber or the like surrounds the inside of this opening and protrudes from it so that it acts as a seat can serve for the swimmer. 3. Vent valve according to claim 2, characterized in that that the ring made of rubber or the like on Scnwinuner is attached and protrudes from this, so that the wall surrounding the opening is the seat for the swimmer forms. . Vent valve according to claim 2 or 3, if this is a combined kinetic and automatic ■ t-λ ■■ ■ ·: '·;'. ■■ "^ ~ - ' ^: - 209814/0751 "BAUORlQtNAL 291/70 JtO Valve forms, characterized, üaii cer Float is provided with an axially extending outlet opening of small diameter, which extends through a nipple which is formed on the float and protrudes from it, where a well-known ball flop as The float for the automatic valve must be closed off the aforementioned small outlet opening can. 5. Vent valve according to claim 1, if this is an automatic valve of the above marked Type, characterized in that the float is vertically movable along ribs, which are formed on the upper bell-shaped part of a housing, which is axially extending outlet opening of small diameter, which extends through an on the inside of the upper end of the housing integrally formed by this protruding nipple extends, the float with a plug made of rubber or the like. Verr.eaen which closes the mentioned opening can that it is pressed against the nipple. 6. Vent valve according to claim 1, if this one combined kinetic and automatic valve, characterized in that the upper part of the Housing according to claim 5 forming the float according to claim 2 or 3. - 10 - 2098U / 0751 8AD ORiGfNAi