SU512328A1 - Bellows valve - Google Patents

Description

one

The invention relates to stop valves and is intended to shut off pipelines with liquid metal media.

Valves are known in which reliable tightness is achieved by creating a layer of frozen metal between the valve body and the saddle when pumping through the hollow valve body or the hollow saddle of the coolant.

However, in these valves, scale is deposited on the walls of the cavities, which is periodically removed by washing with a solution of nitric acid. At the same time, the flow of water through a crack in the gate can cause an explosion or fire.

The purpose of the invention is to increase the reliability of the valve.

This is achieved by the fact that the heat pipe is installed directly in the valve assembly, for example, embedded in the spool, or in the body in the seat area, and separated from the body by a cavity insulated from the process fluid.

FIG. 1 shows the proposed bellows valve with a heat pipe embedded in a hollow closure member; in fig. 2 - valve with heat pipe embedded in the housing

in the seat area; in fig. 3 is a section along A-A in FIG. 2

The valve body 2 and the bellows 3 connecting them are located in the valve body 1. Reliable sealing is achieved by creating a layer 4 of the metal to be frozen between the valve body 2 and the saddle 5. The inner surface of the walls of the hollow valve body 2 (see Fig. 1) and the seat 5 ( see Fig. 2) has a capillary structure 6 impregnated with a heat-transfer fluid. The lower cooled portion of the hollow closure member 2 (€ M. Fig. 1) and the saddle 5 (see Fig. 2) are connected by a capillary structure 6 to a condenser 7. From the cavity

5, valve body 2, seat 5 and condenser 7, air and impurities of non-condensable gases are removed. The container of the closure member 2 containing the capillary structure 6 is separated from the body 1 by a cavity 8 formed by

0 walls of the valve body 2 and isolated from the working environment.

The device works as follows. The coolant evaporates on the surface of the walls of the closure member 2 and the saddle 5;

5 heat from the frozen metal layer 4. The vapor fills the cavity and condenses with heat on the walls of the condenser 7. The condensed coolant returns to the evaporation zone through the capillary structure 6.

Claims (1)

1. Bellows valve for high-temperature environments with a cooling device in the form of a heat pipe and a slide valve and seat assembly located in the housing and a screw actuator, characterized in that, in order to increase reliability, the heat pipe is installed directly in the valve assembly, for example, embedded in the slide valve . Valve io p. 1, different 2 that the heat pipe is built into the housing in the location of the saddle. Valve on PP. 1-2, wherein the heat pipe is separated from the body by a cavity insulated from the process fluid.  S