SU1464144A1 - Three-way non-mixing flow control valve - Google Patents

Abstract

The invention relates to the field of mechanical engineering, namely, devices for not: interfering with the regulation of the flow rate of two liquids, for example, in thermostatic systems, as well as for controlling the flow rate of two gaseous media. The purpose of the invention is to simplify the design, increase the control accuracy and reduce the size. In the valve, the regulator is made in the form of a plunger 7, the stem 15 of which is connected to the membranes 10 and 11, which form intermediate cavities 12 and 13 with the plunger ends. In the plunger there is a groove with a constant cross section and two grooves with a variable cross section. The valve provides smooth adjustment of the flow rate of two fluids with minimal Q drive force and simplicity of design. 2 Il. (/)

Description

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The invention relates to mechanical engineering, namely, devices for unmixing control of the flow of two liquids, for example, in thermostatic systems, as well as for control of the flow of two gaseous media.

 The purpose of the invention is to simplify the design, improve the accuracy of regulation and reduce the size, as well as reduce the effort to move the regulator by balancing it against the pressure of the working environment.

FIG. 1 shows a valve in section; FIG. 2 shows a section A-A in FIG.

The valve includes a housing 1 with two inlet ports 2 and 3 and an outlet 4 with nozzles and caps 5 and 6. In the housing, a plunger 7 is placed with grooves 8 and 9 of variable rectangular cross section. Plunger 7 is fastened to housing 1 by two flexible elements 10 and 11, forming intermediate cavities 12 and 13, which are interconnected through each other through channel 14. Plunger 7 is rigidly connected to rod 15.

Valve works in 1 SHCHIM way.

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In the middle position of the plunger 7, the inlet nozzles 2 and 3 overlap the middle portion of the plunger, and no media flow occurs. When the plunger 7 is moved to the right of its middle position, the flow rate of the first medium, which comes from the inlet nozzle 2 through the groove 8 into the cavity 12 and through the groove 14 into the cavity 13 and the outlet nozzle 4 4, gradually increases. When the plunger 7 moves to the left of the middle position smoothly increases the flow rate of the second medium, which comes from the inlet 3 through

the bore 9 into the cavity 13 and the measure of the bore 14 into the cavity 12 and the outlet 4. When each of the working medium flows, the plunger 7 is balanced by the pressure of the medium on its ends and flexible elements of equal effective areas, which also provide a reliable sealing of the valve cavity .

The three-way non-mixing control valve provides smooth adjustment of the flow rate of two media with minimal drive force and simplicity of design.

Claims (1)

Invention Formula A three-way non-mixing control valve, containing the 1st body with two inlet and one outlet branch pipes and an adjustable movable member connected to the stem, about one and the other. By the fact that, in order to simplify the design, to increase the regulation accuracy and to reduce the size, the regulating body is made in the form of a plunger, the rod of which is rigidly connected with flexible elements, fixed on the casing and forming intermediate cavities in the plunger ends a through groove, which permanently interconnects the intermediate cavities and the outlet, and in the plane of the inlet pipes on the opposite ends of the plunger facing towards the intermediate cavities, grooves with a cross section are made} reducing from the ends of the plunger in the direction of the inlet nozzles, and the length of each of the grooves is selected from the condition that the inlet nozzles overlap with the surface of the plunger in its neutral position. srig.2