SU625081A1 - Sliding gate - Google Patents

Description

The invention relates to pipe fittings and can be used in pipelines operating on any media, in particular contaminated, containing, for example, abrasive materials.

The spherical gate valve is known, in the guides of the casing of which a spindle interacts with elastic sealing rings placed in the slots of the casing 1.

Also known is a spigot gate valve with wedge-shaped elastic seal spikes, the vertices of which face the spline and are displaced to the center of the ring, and the bases are placed in grooves made concentrically with the bore 2 on the sides.

These valves are not reliable and durable (wear resistant), especially when working on polluted media and at high pressures.

The aim of the invention is to increase the durability of the valve.

This is achieved in that the mating surfaces of the bases of the sealing rings

and the corresponding grooves of the body are made toroidal.

FIG. 1 shows the proposed flap, side view; in fig. 2 - the same, front view.

Grooves 2 and 3 are made in the housing 1 of the gate valve, concentrically located through the bore 4 on both sides of the plane of movement of the gate 5.

In slots 2 and 3, the bases 6 and 7 of the elastic rings 8, 9 are wedge-shaped, sealing the gate 5, the vertices 10 and 11 of the rings face the gate 5 and are displaced to the center of the rings 8 and 9. The adjacent surfaces of the bases 6 and 7 of the rings and corresponding their slots 2 and 3 are made toroidal. When the spline 5 moves in the guides 12 and 13 of the housing 1 during closing, the elastic rings 8 and 9 are somewhat unfolded in the slots 2 and 3, thanks to the toroidal mating surfaces of the bases 6 and 7 of the rings and the corresponding grooves 2 and 3, and occupy a position in which vertices 10 and 11 of rings 8 and 9 are pressed against the lateral surface of gate 5. In this case, rings 8 and 9 unfold in grooves 2 and 3 so that between the flat and l. The I gate is formed by the ijrel f S bone, the wedge gap due to the projections 12 and 13 of the housing 1. The magnitude of the deformation of the rings 8 and 9 is negligible. To keep the rings 8 and 9 from bending into the grooves 2 and 3 of a rather small protrusion 14 of the housing 1. The pressure of the medium through the valve presses the tops 10 and 11 of the rings 8 and 9 to each other in the open position and to the gate valve 5 in the closed position, joint density. The pointed edges of the rings 8 and 9, abutting one another, create a density between the passage part of the valve body 1 and the cavity 15, in which the gate 5 is inserted when the valve is in the open position. The cavity 15 is flushed from accidental contamination through the openings in the upper and lower parts of the valve body 1. Solid cast rings 8 and 9, made of rubber or polymeric materials. V-shaped section, due to small leformations do not create large loads when closing - .. d 1bera 5. Formula of the invention Shibern valve with elastic compacting slide gate rings wedge-shaped, the top of which is obrashed, extended to the gate and displaced to the center of the ring, and the bases are placed in grooves made concentrically to the through hole on both sides of the mixing plane of the gate, characterized in that, in order to increase durability, the mating overhnosti bases rings and corresponding grooves formed torus-shaped. Sources of information taken into account in the examination: 1.UK patent number 1260114, cl. F 2 V, 1972. 2. US Patent No. 3350056, cl. 251-100, 1967.

3ffflfjtmo

FIG. I

/ t

FIG. g