RU1809901C - Safety valve - Google Patents

Abstract

Use: in thermal and nuclear power plants. SUMMARY OF THE INVENTION: A membrane sensing element is installed in a housing with input and output channels, and a support disk interacts with the Crimea. An emphasis is placed on the housing cover, interacting with the support disk. The disk is made of composite ring elements with stepped mating surfaces. Mounted with the possibility of axial movement relative to each other. A guide disc with radial grooves and a rotary disc with a spiral groove are fixed in the lid. Each emphasis is placed with one end in the radial groove, the other in the groove. 1 s.p. f-ly, 5 ill.

Description

The invention relates to valve engineering and can be used in safety valves of thermal and nuclear plants.

An object of the invention is to expand the functionality of a valve by expanding its pressure application range.

Figure 1 shows a valve with a fixed stop; figure 2 - valve with a fixed focus in operation; Fig. 3 shows a valve with a movable stop; figure 4 is a section aa in fig.Z; Fig. 5 shows a valve with a movable stop in operation (arrows indicate the direction of flow and the effect of the pressure of the medium).

The safety valve (Fig. 1) contains a housing 1 with a cover 2, in which a membrane sensing element 3 is placed, which interacts with the stop 4 by means of a support disk 5. A force spring 6 is attached to the cover, pressing

using rod 7, spool 8 to the valve seat.

The support disk 5, which selects the membrane 3, is made of constituent elements (1.1, etc.) with stepped mating surfaces with the possibility of axial movement relative to each other.

The emphasis 4 can be made stationary, in the form of a ring (as shown in Fig. 2) or movable in the form of ring segments (Fig.Z).

In the latter embodiment, the valve comprises an abutment movement mechanism which. includes a spiral 9 and a guide 10 discs, fixed in the cover with a nut 11.

The spiral disk is made with spiral grooves and with which the stop 4 engages.

Closer to the center, the disk goes into the sleeve 12, covering the rod) 7 using

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which can rotate the spiral disk around the vertical axis of the valve.

The guide disc serves (Fig. 4) to guide the holding of the stop 4, more precisely its annular segments 13.

Segments (at least three) are located in the radial grooves b and have the ability to move along the groove from the center to the periphery and vice versa. Moreover, if the spiral disk has freedom of movement (rotation), then the guide is fixed against rotation, for example by a key (not shown).

During rotation, the spiral disk acts on the segments 13, moving them in the grooves of the guide disk. Moreover, all segments synchronously move in radius and can thus be mounted above any of the constituent elements (l, ll, etc.) of the support disk, becoming for it (the element) a fixed support, and excluding its movement in the vertical direction.

When a support disk is mounted above the annular recess in (Fig. 3), the segments do not prevent the latter from being displaced upward by pressure. In this case, the entire area of the sensing element 3 is included in the operation.

When installing segments 13 above the element II of the support disk (Fig. 5), the elements I and I are fixed due to their power closure on the housing cover. At the same time, they are shut down from work

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him 8 spool, the area of the membrane resting on these fixed elements.

When the pressure in the valve rises, it acts on the membrane, which is supported by non-fixed elements III, IV, V, compresses (through the stem 7) the spring 6 balancing them, opens the spool 8 from the seat, turning the valve on.

The proposed design makes it possible to significantly expand the functionality of the valve using it in a wide pressure range (with a single spring).

Claims (2)

SUMMARY OF THE INVENTION 1. The safety valve, in the case with the input and output channels of which a membrane sensing element is installed, a supporting disk interacting with it, a spring-loaded spool and at least one stop acting on the housing cover interacting with the supporting disk, characterized in that the supporting disk is made of integral ring elements with stepped mating surfaces mounted axially movable relative to each other, 2. The valve according to claim 1, characterized in that a guide disc with radial grooves and a revolving disc with a spiral groove are fixed in the cover, each stop being placed with one end in the radial groove and the other in the spiral-1 groove .. Thebes. 2 X 5E eleven 7 Fig.Z