RU1796045C - Valve - Google Patents

Abstract

The invention relates to pipeline valves and can be used in the chemical, medical and food industries to control the flow of liquids and gases. The purpose of the invention is the expansion of functionality and increase of technical and economic indicators, reducing the size and weight. During operation of the valve, its operability is ensured in forward and reverse flows due to the installation of a sleeve with a cylindrical collar in the cavity under the membrane, which enters the corrugation of the membrane in the closed position of the valve. 3 ill.

Description

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The invention relates to pipeline valves and can be used in the chemical, medical and food industry to control the flow of liquids and gases.

Membrane valves are known in which the flow of the working fluid flowing through the valve is separated from the surrounding space or the control working fluid by means of a flexible membrane. Flat and corrugated membranes are used for this purpose. The use of such membranes in valves leads to an increase in size and, consequently, weight due to an increase in the diameter of the valve body at the site of sealing of the membrane.

The use of membranes with corrugation formed during assembly (cup, cylindrical, conical) in valves where the membrane is subjected to pressure both on one and the other hand is complicated

the need to install two membranes, which also increases the size and weight of the valve.

The closest technical solution may be a device.

The aim of the proposed technical solution is to expand the functionality and increase technical and economic indicators, i.e. creating a design with one membrane operable with a wider pressure range of the working fluid, a two-sided pressure drop with a decrease in size and weight,

The indicated goal is achieved by that. that in a valve containing a housing, a sensing element in the form of a membrane with a corrugation, a locking member connected to the rigid center of the membrane, the membrane being loaded with a spring, a sleeve with a cylindrical sleeve is installed in the cavity under the membrane

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a collar entering the corrugation of the membrane in the closed position of the valve.

The essence of the proposed technical solution is: the relationship of the dimensions, parameters of the membrane and the sleeve with a cylindrical shoulder; the location of the membrane, the sleeve and the bore of the valve, which makes up distinctive features from the prototype and ensures the operation of the membrane, and hence the valve as a whole, as in the presence of pressure in the supra-membrane and its absence in the submembrane cavities, and in the opposite case, i.e. with a bilateral difference.

Figure 1 shows the design of a valve controlled by the pressure of the control body in the open state; Fig. 2 shows the design of the same valve in the closed state; Fig. 3 shows a design of a valve controlled by an electromagnet in a closed state.

The invention is illustrated by the following examples.

The working fluid is pressurized into the housing 1, for example, as shown by the arrow in Fig. 1. Under pressure, the membrane 4 with the locking member 3, combined with its rigid center, lifts the spring upward. 5. At the same time, the corrugation of the membrane is pressed against the inner surface of the lid 7 and repeat its profile, and to the outer surface of the glass b. The working fluid through the seat 2 is directed to the exit. The valve is open.

Under the action of the control pressure applied to the supramembrane cavity A in the direction of arrow in Fig. 2 and the spring force, the shut-off element sits on the seat, interrupting the passage of the working fluid through the valve, and the membrane corrugation tightly fits the cylindrical collar of the sleeve 8 of the valve.

In the case of the supply of the working fluid under pressure from the opposite side, into the cavity B, the valve works similarly.

Claims (1)

SUMMARY OF THE INVENTION A valve comprising a housing, a sensing element in the form of a membrane with a corrugation, a locking member connected to the rigid center of the membrane, the membrane being connected to the locking member fixed to the rigid center of the membrane when the working fluid is pressurized in the direction shown in FIG. , striving to open the valve and at the same time through the channel Г through the hole D enters the supramembrane cavity, creating a force tending to close the valve. Under the action of pressure in the supmembrane cavity of the corrugation of the membrane as in the previous case, the cylindrical collar of the sleeve fits tightly. The spring is closed by the force of the spring. When the working fluid is supplied under pressure into the cavity B, the generated force simultaneously presses the locking member against the seat and wringes it away, acting on the membrane. Now the corrugation of the membrane fits the inner surface of the lid and the outer glass. The spring is also closed by the spring force. By the force created by the electromagnet when voltage is applied to it, the core 10 is drawn in, compressing the spring and opening the valve. in the open position of the valve, the membrane is unloaded, since the pressure of the working body acts on both sides of its entire area. In the example shown in FIG. 3, from the ratio of the valve seat area to the membrane area efficiency depends on the force created by the pressure of the working medium, which the power drive must overcome - in this case, an electromagnet. In particular, when the areas are equal, the force on the spool from the pressure of the working medium is balanced by the force on the diaphragm and the force required from the actuator to open the valve is independent of pressure working medium. For such a valve, the direction of flow of the working medium and the inlet and outlet cavities during operation are indifferent - you can swap places. loaded with a spring, characterized in that a sleeve with a cylindrical collar is inserted in the cavity below the membrane, which enters the corrugation of the membrane in the closed position of the valve. figure 2 Editor FIG. 3 Compiled by V. Pogrebinsky Tehred M. Morgenthal Corrector S. Patrusheva