PL160681B1 - Universal aerating-deaerating valve - Google Patents

Abstract

1. A universal vent valve composed of a container (9) fixed in the armoured casing, a body (5) inside which, there is a float (7) with a variable weight depending on the pressure in the container, characterised in that the part of the body (5) inside the container, has openings (12) which cut off the air cushion in the container, which takes over the kinetic energy of a hydraulic ram at the time of closing the valve.<IMAGE>

Description

The subject of the invention is a venting-venting valve, intended for venting or venting and aerating closed reservoirs with retention nature, as well as industrial installations or other installations.

There are airing valves with catalog no. 919 SWW 0615-142 and venting valves with catalog no. 917 or 918 SWW 0615-142, which must be used simultaneously.

The previously known valves have the following disadvantages:

- the aeration function is separated from the venting function, as a result of which both valves should be used simultaneously,

- the valve, which cuts off the gas flow, takes the impact of the rushing column of liquid supplying the tank to itself and the tank,

- the valve does not open under pressure, although the tank is full of gas,

- the valve float is exposed to static or dynamic pressure and is often damaged,

- the valve body is made of cast and is very heavy and massive.

The object of the invention is to provide a new valve design that will enable

- combination of venting and aeration functions in one valve

- limiting the speed of the supply liquid stream at the moment of cutting off the gas flow to such an amount that the kinetic energy of the dispersed liquid will not damage the valve or the tank,

- cut-off in the reservoir of the airbag, which will take over the kinetic energy of the supply liquid stream, not exceeding the critical parameters of the reservoir,

- venting the tank under pressure,

- protection of the float against damage due to static or dynamic pressures.

In the valve according to the invention, these aims are achieved by:

- the diameter of the venting nozzle was selected so that the gas outflow was not free, so that when filling the tank with liquid, the gas pressure under the valve increased, which at the end of filling reduces the speed of the liquid stream supplying the tank to a safe value that eliminates the action of the water ram,

- the float is open at the bottom, so the pressure in and outside the float is the same, without damaging it,

- as the pressure increases, the float fills with liquid, increasing its weight. The weight of the float in the operating pressure range of the valve is to some extent proportional to the force that the pressure in the tank closes the valve. If the liquid level in the valve body drops, it opens and the tank is vented,

160 681

- the valve in the part inside the tank has openings which cut off an air cushion in the tank, selected so as to absorb the kinetic energy of the feed liquid stream without exceeding the critical parameters of the tank.

The specificity of media cooperating with the valve shows that this valve can be universal for many tanks and installations. In order to restrict the valve's function to venting only, install a non-return gas valve on the venting nozzle.

The subject of the invention is shown in an embodiment in the drawing, in a longitudinal half-section and a half-view. The valve consists of a body (5) closed with a cover (2) in which a venting nozzle (1) is mounted. These elements were sealed with gaskets. A part of the body (5) is outside the tank (9), hereinafter referred to as the outer body part, and a part inside the tank (9) called the inner body part (5). Between the external and internal parts of the body (5) there is a generally used thread, with which the valve is mounted in the armor (9) of the tank. In the inner part of the body (5), holes (12) and (14) are made, through which the media flows into or out of the valve. The holes (12) are positioned so as to shut off the air cushion (10) in the reservoir (9). The holes (14) allow the liquid to be emptied from the float. The float (7) is equipped with a gasket (3) from the top, which closes the flow of gas from the tank through the venting nozzle (1), and from the bottom into a tube (13) through which the liquid flows into the float as pressure increases, increasing the weight of the float .

The operation of the valve is based on the fact that after reaching the liquid level (11) in the tank (9), the upper edge of the openings (12), the valve cuts off the air cushion (10) in the tank, and the liquid flows into the valve body (5), which fills the body and swimmer. After the liquid reaches the float level (4) in the body (5), the liquid raises it and cuts off the flow of gas from the venting nozzle (1). The level of the liquid in the float (7) depends on the pressure in the tank, so its weight is a function of the pressure of the media in the tank. When the liquid level (11) in the tank drops below the holes (12), liquid will flow out of the valve. If the liquid level in the body (5) drops below the opening level (8) of the valve, the weight of the float (7) will be greater than the force pressing the float together with the gasket (3) to the venting nozzle (1), which will open the valve and outflow from the body (5) of the air valve until reaching the level of buoyancy (4) of the float (7), which the liquid will raise, closing the valve.

Publishing Department of the UP RP. Circulation of 90 copies

Price: PLN 10,000

Claims (2)

Patent claims 1. A universal venting and venting valve made of a body (5) permanently embedded in the tank's shell (9), inside which there is a float (7) of variable weight, depending on the pressure in the tank, characterized in that part of the body (5) ) inside the tank is equipped with openings (12), which cut off the air cushion in the tank, which absorbs the kinetic energy of the water ram when the valve is closed. 2. The valve according to claim The valve according to claim 1, characterized in that the valve float (7) is open at the bottom and, due to the pressure increase, it fills with liquid, changing its weight.