SU1760224A1 - Compressed medium ball cock - Google Patents

Abstract

The invention relates to a valve. The aim of the invention is to increase the reliability of operation by eliminating friction of the cork on the saddle at the time of the turn. When the ball valve is closed, the control unit 25 is transferred to a position that allows the cavities D and D to communicate through the pipeline 27 with the low pressure area through the drain pipeline. At the same time, the cavities B and E communicate through the pipelines 21, 26 and 22 and the non-return valves 23 and 24 with internal valves. the cavities of the pipes 8 and 9. The pistons 2 and 3 move in the direction of the plug 14. Due to the coupling of the ferromagnetic intermediate elements 10 and 11 with the magnets 4 and 5, the levers 12 and 13 move the plug 14 to the closed position. After turning the plug 14 at 90 °, due to the action of the stops 16, the rotation of the plug 14 stops. In this case, the magnets 4 and 5 are separated from the intermediate elements 10 and 11 and the seats 6 and 7 are pressed against the plug 14. In the event of a pressure drop in any of the pipes 8 and 9, the pressure in the cavities B and E is maintained through non-return valves 23 and 24 depending on which of the nozzles 8 and 9 will remain under pressure. In the case of a pressure drop in both the nozzles 8 and 9, the valve will be kept closed with magnetic locks containing magnets 17 and 18 and ferromagnetic rings 19 and 20. 4 silt (Ls

Description

The invention relates to reinforcement, designed for nuclear power plants and can be used in hazardous and potentially safe industries.

The aim of the invention is to increase the reliability of operation by eliminating friction of the cork on the saddle at the time of the turn.

FIG. 1 shows a ball valve, a section in the open position, FIG. 2 - section A-A in FIG. 1 (positions 21, 22, 23, 24, 25, 26, 27 are not indicated); in fig. 3 - the same. that in fig. 1, in the closed position, in FIG. 4 shows a section BB in FIG. 3 (position 21, 22, 23, 24, 25, 26 and 27 are not listed).

The ball valve includes a housing 1, which is cylinders in which double-acting pistons 2 and 3 are placed, connected to permanent magnets 4 and 5 and cylindrical seats 6 and 7. Pistons 2 and 3 and saddles 6 and 7 are made coaxially and axially movably relative to the pipes 8 and 9.

Between pistons 2 and 3 and permanent magnets 4 and 5, intermediate elements 10 and 11 made of a ferromagnetic material are movable relative to the pistons. Intermediate elements 10 and 11 with the help of levers 12 and 13 of the hinged-lever mechanism kinevj о о

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magically connected to the cork 14, which has a spherical surface.

The plug 14 is provided with trunnions 15 and stops against the stops 16 of its rotation. Pistons 2 and 3 are equipped with magnetic locks, which consist of permanent magnets 17 and 18 and coils of ferromagnetic material 19 and 20, mounted on the housing.

The ball valve is provided with pipes 21 and 22, by means of which, through non-return valves 23 and 24, the internal cavities of the pipes 8 and 9 communicate with the governing body 25.

The control member 25 communicates via conduit 26 through cavities B and E, via conduit 27 from cavities D and D, and through the conduit drain to the low-pressure area transported through the ball valve medium.

Works ball valve as follows.

In the open position of the ball valve, the transported fluid through pipelines 21 and 22 (Fig. 1.2) through the non-return valves 23 and 24 and through the secondary body 25 through the pipeline 27 communicates with the cavities D and D of the pistons 2 and 3, holding them through the surfaces of the seats 6 and 7 and the plug 14 in the open position. The cavities B and E through the pipe 26 and the control member 25 communicate with the low pressure area through the drain pipe.

In the open position due to the fact that the openings of the nozzles 8 and 9 of the tube 14 are equal and coaxial, the hydraulic resistance of the ball valve is almost equal to the hydraulic resistance of the pipeline section of similar length and diameter.

When the ball valve is closed, the control unit 25 (FIG. 3) is switched to a position that allows the cavities D and D to flow through the pipeline 27 to the low pressure area through the drainage pipeline.

At the same time, cavities B and E communicate through pipes 21, 26 and 22 and non-return valves 23 and 24 to the internal cavities of the pipes 8 and 9. Pistons 2 and 3 move towards the plug 14. By adhering the ferromagnetic intermediate elements 10 and 11 to the magnets 4 and 5 levers 12 and 13, the stopper 14 is moved to the closed position.

At the same time due to peretechek in the gaps between the tube 14 and the ends of the nozzles 8 and

9 provides unloading of the plug from the pressure drop.

After turning the cork 14 by 90 °, due to the action of the stops 16, the rotation

plug 14 is terminated. In this case, the magnets 4 and 5 are separated from the intermediate elements 10 and 11, and the seats 6 and 7 are pressed against the plug 14 by locking the valve. In the event of a pressure drop in any of

pipes 8 and 9, cavity pressure B and E is maintained through non-return valves 23 and 24, depending on which of the pipes 8 and 9 remain under pressure. In the case of a pressure drop in both

The pipes 8 and 9 will hold the valve in the closed state with the help of magnetic locks. The opening of the valve takes place when the control member 25 is moved to the position shown in FIG. one .

In this case, the cavities D and D communicate with the high-pressure area of the medium through the non-return valves 23 and 24, depending on which of the pipes 8 or 9 maintains a high pressure.

First, before the magnets touch

4 and 5 with movable intermediate elements 10 and 11, the plug 14 does not unfold, and due to the forming gap between the plug 14 and the seats b and 7, the plug is unloaded from the forces caused by the differential pressure,

After contact of the magnets 4 and 5 with the moving intermediate elements 10 and 11, the plug turns in

open position.

Claims (1)

Claims of invention The ball valve for pressurized media, comprising a housing in which a rotatable plug is installed, a hinged lever a mechanism and a cylindrical seat progressively moved in the axial direction, characterized in that, in order to increase reliability in operation, it is provided with an additional seat, stopper stops-stops, double-acting pistons with magnetic locks mounted on them, permanent magnets, intermediate elements moving relative to the pistons, two non-return valves and a governing body, the seats are rigidly connected to the specified pistons and permanent magnets and, via moving intermediate elements, to pivot-lever levers mechanism, and the seat bearing surfaces are opposed to each other, and the intermediate elements are made of ferromagnetic material, H PJ CN O CD GGT ). &five B. 21719 g S 4 6 12 M ff 16 13 7 5 11 9 20 S j L one 24 TT1 G 27 12 fS25 I fie.Z TT a & g  { ff-6 U 4% ft ft -K / ff .... A rr-rv B 8 D 17 five // 203 I I 18 g in 9