SU756120A1 - Valve arrangement - Google Patents

Description

The invention relates to pipeline fittings and can be used to control the flow of the medium in systems operating under the pressure of a wet gas.

A valve is known, in the case of which there is a heating element with a coolant passing through it [1].

Also known valve, in the case of which is located heating element of the heater [2].

The closest technical solution is a valve device comprising a housing with cavities of high and low pressure, a saddle, a closing member cooperating with it, and a device for heating [3].

A disadvantage of the known devices is the need for an external source of energy (heating and moving the coolant), complication and cost of maintenance.

The aim of the present invention is to increase the efficiency of operation due to the conversion of the kinetic energy of the working environment into heat.

This goal is achieved by the fact that the device for heating is made in the form of

placed in the heating zone of the valve, for example, a valve with a valve in the form of a spring-loaded glass, the cavity of which communicates with the cavities of high and low pressure of the valve device.

₅ In FIG. 1 shows a longitudinal section of a valve device with non-return valves located in a housing around the nozzle; in fig. 2 - section A — A in FIG. one; in fig. 3 is a longitudinal section of the valve device with a check valve located in the valve block valve.

devices.

Valve device (see. Fig. 1) consists of a body 1 with reinforced therein seat 2 cooperating with it the locking body 3, devices for heating, you are ¹⁵ complements a few, e.g., check valves disposed in the housing 1 from the inlet pressure (high pressure cavity a). The check valves contain shut-off members 4 with openings 5 for the passage of the medium, loaded with springs 6. The internal cavities b of the check valves are communicated through the holes 7 with a narrow cross section in the valve device, the place of origin

3

756120

four

reduced pressure when the medium flows from the high-pressure cavity a into the low-pressure cavity c.

Valve device (Fig. 1) works

in the following way..

The direction of medium flow is indicated by an arrow. In the closed position of the locking member 3, the pressure in the cavity a is equal to the pressure in the cavities b, the locking members 4 of the check valve, under the action of the springs 6 are in the closed position.

In the open position of the locking organ, <0 for 3 valve devices, the medium flows from cavity a to cavity c. Due to throttling, the temperature decreases with freezing of condensable moisture. In a narrow section of the valve device, formed by the locking member 3 and the housing 1, due to high velocities of the medium, the pressure decreases and the medium from the cavity b is ejected into the cavity c. The pressure in the cavity b drops, the locking bodies 4 of the check valves under pressure 20 in the cavity a rise, cover the openings 7 and the working medium through the openings 5 fills the cavity b. The pressure in the cavities b and a is equalized and the locking bodies 4 of the revolving valves are closed by the action of the springs 6, opening the openings 7. The medium from the cavities b is removed into the cavity c, the pressure in the cavity b decreases, and the cycle repeats. This ensures a pulsating flow of the medium in cavity b with a maximum kinetic energy determined by the pressure difference in cavities a and b. When the medium interacts with the walls of cavity b, the flow is braked and the kinetic energy is transferred to heat, perceived by body 1 in the area of the seat 2 of the valve device - ¹⁵ elements most prone to frosting when the working medium is throttled from cavity a to cavity c.

Placing a check valve in the valve body 3 (Fig. 3) is rational if it is necessary to warm up the valve device in the closed position. Such a need may occur in the winter when installing the valve device outdoors.

The possibility of heating the valve device in the closed position is ensured by the fact that the rod 8, before opening the shut-off body 3, has to move b, ensuring the supply of the working medium to the shut-off organ 4 of the check valve and then into the cavity b, where it is braked. The removal of the medium from the cavity b is carried out through the channels 7 directly into the low pressure cavity c.

Claims (1)

Claim Valve device containing a housing with cavities of high and low pressure, a saddle, a valve body that interacts with it, and a heating device, characterized in that, in order to increase the operating efficiency by converting the kinetic energy of the working medium into heat, the heating device is made as located in the heating zone of the valve, for example, the return valve with a valve in the form of a spring-loaded glass, the cavity of which communicates with the cavities of high and low pressure of the valve device.