RU2696517C1 - Water-moving column with pressure valve - Google Patents

Abstract

FIELD: water supply devices.

SUBSTANCE: invention relates to water supply devices, and more specifically to devices for shutoff of a drain pipe of a water intake column. Water-moving column with pressure valve comprises housing with water-supplying and pouring pipe arranged inside it, having pressure valve at its end, which includes a return spring support connected to the water supply pipe, resting on the valve plate connected to the pouring pipe, the seat body with the internal saddle tangential surface, between which and the valve plate the toroidal resilient seal ring is located, and between the seat housing, the pouring pipe and the spring support there are movable seals, characterized in that the inner saddle tangential surface is inclined at angle of 60–80° to the plane perpendicular to the direction of translational movement of the valve plate. Said technical result is achieved by increasing wear resistance of toroidal sealing ring located between spindle and cover by its axial rotation.

EFFECT: improved reliability of the known device.

1 cl, 3 dwg

Description

The invention relates to water supply devices, and more particularly, to devices for shutting off a discharge pipe of a water intake column.

A seal for the valve stem [1] is known, in which the valve comprises a housing with a bore, with a stem located therein with a shut-off element that allows or prevents flow through the outlet.

Known shut-off valve [2], comprising a housing with a through channel, which can be closed by a shut-off element in the form of a spool piston. Outer rings are provided for the outer seal, mounted on the side of the housing and in tight contact with both the opening of the housing and the locking element.

The disadvantage of these devices is that the o-rings are subjected to pressure loads in one direction - along the movement of the rod, which leads to the destruction of the structure of the material of the ring and, as a consequence, the occurrence of leaks, which reduces the reliability of the device.

A valve [3] is also known, comprising a body with a through hole, a cover with a seal fixed with a threaded connection in the upper part of the body, a spindle placed on the thread in the cylindrical hole of the cover with axial movement, a shut-off element made in the form of a spool mounted on the end of the spindle and overlapping the bore in the housing, and two o-rings, the first of which is installed in the spool groove above the protrusion made above the bore of the housing, and in ond sealing ring disposed in the annular groove between the spindle and the cover. In it, additional means are needed to install the sealing rings, which complicates the valve design and reduces the reliability of the seal.

Closest to the proposed device (prototype) is a valve according to the patent of the Russian Federation for the invention [4] which contains a housing with a through hole in which the lid with a seal is fixed using a threaded connection in the upper part of the housing. The spindle is placed on the thread in the cylindrical hole of the cover with the possibility of movement in the axial direction. The locking body is made in the form of a spool. The spool is mounted on the end of the spindle and overlaps the bore in the housing. There are two o-rings. The first of the o-rings is installed in the groove of the spool above the protrusion. The latter is made over the through hole of the housing. The second sealing toroidal ring is located in the annular groove between the spindle and the cover. The protrusion is made with a bevel at an angle of 20 ° ... 30 ° towards the passage opening of the housing. The section of the groove under the second o-ring is made in the form of a groove with a conical narrowing in the direction opposite to the pressure.

The present invention is aimed at improving the reliability of the known device. The specified technical result is achieved by increasing the wear resistance of the toroidal sealing ring located between the spindle and the cover by axial rotation.

The invention is illustrated by drawings, where figure 1 shows a tangential pressure valve for a water column, where the section shows the position: a) the valve is closed; b) - the valve is open and the composition of the product: 1– spring support; 2- the seal is stationary; 3- seat body with an internal saddle tangential surface; 4- valve plate; 5- toroidal elastic seal ring; 6-saddle tangential surface; 7- the seal is movable; 8- spout pipe; 9 - return spring; 10- column housing.

Figure 2 shows a diagram showing an increase in the pressing force with a tangential contact of the plate seal and the surface of the seat when the valve is in the closed position, where ∑ _pr is the total pressing force; P _post - translational effort; P _side - lateral force, P _cr - the force that creates the torsion of the toroidal seal, equal in magnitude P _post and directed in the opposite direction.

Figure 3 shows the rotation pattern of the sealing toroidal ring around the generatrix of the torus when closing the valve.

The technical solution is achieved by the fact that the sealing toroidal ring (5) sits on a solid saddle (6) tangential surface located at an angle of 60 ° ... 80 ° to the direction of translational movement of the valve disc (4). In this case, due to the addition of forces, the sealing ring rotates at an angle relative to the round generatrix of the torus (Fig. 3). As a result, no permanent deformation zone is formed on the sealing toroidal ring, which worsens the reliability of valve closure.

Thus, the present invention differs from the prototype in that the valve disc sits on a tangential conical surface having an inclination of 60 ° ... 80 °, by means of an elastic sealing toroidal ring, and the ring sits on the conical surface semi-movably with some displacement and scrolling for some the angle relative to the axis of the section of the circle forming the torus (Fig. 3). The slope of 60 ° ... 80 ° is established experimentally.

The column works as follows: When you press down on the handle of the water supply column (not shown in the figures), the discharge pipe (8) moves down and the valve disc (4) moves down, compressing the return spring (9). In this case, a gap (6) is formed between the toroidal elastic seal of the valve plate and the saddle tangential surface, through which water from the water supply (not shown in the figures) enters the discharge pipe (8). When you stop pressing the discharge pipe, the return spring raises the valve disc. In this case, the toroidal elastic seal is pressed against the saddle tangential surface, with the result that the circumference of the annular contact line of the toroidal seal and the tangential surface of the saddle as a result of tangential deformation during the pressing is not constant with each new opening-closing, which reduces the plastic deformation of the toroidal elastic seal and the loss of its geometric shape.

Sources containing prior art:

1. US4531711 Valve and stem seal therefore. F16K41 / 04

2. DE3628736C1 Shut-off valve. F 16 K 41/02

3. Aronovich VV and others. "Regulating and locking fittings", Moscow, Mashgiz, 1954, p.20

4. RF №2262629 Valve. F 16 K 1/02 and F 16 K 41/04

Claims (1)

A standpipe with a pressure valve, comprising a housing with a water supply and discharge pipe located inside it, containing a pressure valve at the end, which includes a return spring support connected to the water supply pipe, resting on a valve disc connected to the discharge pipe, a seat body with an internal saddle a tangential surface between which and the valve disc is located a toroidal elastic seal ring, and between the saddle body, the discharge pipe and the spring support are movable sealing, characterized in that the inner seat tangential surface is made with an inclination at an angle of 60-80 ° to a plane perpendicular to the direction of translational movement of the valve disc

Images