RU2371621C1 - Gate of wedge valve with self-aligned seats - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: gate of wedge valve with self-aligned seats comprises body, cover, rigid wedge and cylindrical seats that interact with it and are self-aligned with gap in body bore by means of stops. Seats are sealed with ring relative to body. Ring is made of elastomer material, for instance polyurethane. Stops are made in the form of bending tabs. At least one of tabs is placed in deepening arranged in groove. Stops may be made in the form of screws.

EFFECT: preservation of locking unit serviceability in process of valve operation at high parameters with a simultaneous increase of repairability extent.

2 cl, 2 dwg

Description

The invention relates to the field of mechanics, namely to pipeline valves, in particular to wedge gate valves, and can be used in the oil and gas industry.

A wedge gate valve with a self-locking shutter is known (see RU 2227854 C2, F16K 3/14), comprising a housing, the sealing fields of which, when closing the valve, interact with the response fields of two disks, the central bosses of which are contacted by spherical surfaces and placed in a cage controlled by a spindle .

The disadvantages of this valve include the intensive wear of the spherical surfaces of the bosses when the valve operates at high pressures of the medium due to the occurrence of large contact stresses in the zone of interaction of the bosses, leading to plastic deformation, i.e. to crumple metal. In addition, the wedge lock consists of two disks, a cracker and a holder controlled by a spindle, which is quite metal-intensive.

A wedge gate valve with self-adjusting seats is also known (see RU 2153115 C2, F16K 3/12, prototype), comprising a body, a cover, a hard wedge interacting with its sealing fields with the response fields of cylindrical seats, which are sealed relative to the body by rings of plastic material, such as graphlex , and installed in the bores of the body with a gap by means of spikes obtained by extrusion.

The disadvantages of the known solution include a low degree of maintainability of the valve due to the difficult dismantling of worn seats from the body, due to the presence of convex spikes, as well as the low efficiency of the valve assembly of the valve due to the implementation of the sealing rings of plastic material, because when the valve operates at high parameters of the conducted medium, they are crushed due to the occurrence of large specific pressures exceeding the yield strength of the material of the sealing rings. At the same time, the deformed ring does not perform the functions of returning to the initial state, and hence the self-installation of the seats, and with the valve open, they can rotate from the medium flow around its axis, because the latter are installed with a gap, which violates the primary mutual arrangement of the wedge and saddles.

The technical problem to be solved is the preservation of the gate valve's operability when the valve operates at high parameters while increasing the degree of maintainability.

The stated technical problem is solved in that the wedge gate valve with self-adjusting seats contains a housing, a cover, a rigid wedge and a cylindrical self-aligning cylinder with a gap in the bore of the body by means of seat stoppers, sealed relative to the latter by a ring, the ring being made of an elastomeric material, for example polyurethane and the stopper is made in the form of folding legs, and at least one of the legs is placed in a recess made in the groove, and the stopper can be ying in the form of screws.

The proposed wedge gate valve with self-adjusting seats is illustrated by drawings:

figure 1 shows the wedge gate valve;

figure 2 is a view of I in figure 1.

The wedge gate valve consists of a housing 1, controlled by a spindle 2 of a solid wedge 3, interacting with freely installed in the housing 1 through rings 4 made of elastomeric material, such as polyurethane, by saddles 5 fixed in the housing by folding legs 6 into the annular grooves 7 of the housing 1, having recesses 8.

Wedge 3 and saddles 5 are made with a plane of sealing fields, ensuring their full fit to each other.

Alternatively, instead of the tabs 6 can be installed in the grooves 7 and the recesses 8 screws 9.

When the gate valve is closed, a wedge 3 enters between the seats 5 and, when fully engaged, the shutter is sealed and the seats 5 self-install in relation to the body 1, which is facilitated by the free installation of the seats in the body and fixing them by folding them into the groove 7 and the recess 8 of the legs 6. When this ring 4, made of elastomeric material, provides a seal between the seats 5 and the housing 1.

Claims (2)

1. A wedge gate valve with self-adjusting seats, comprising a housing, a cover, a rigid wedge and cylindrical interacting with it with a gap in the bore of the body by means of seat stoppers, sealed with respect to the latter by a ring, characterized in that the ring is made of an elastomeric material, such as polyurethane, and the stoppers are made in the form of folding legs, and at least one of the legs is placed in a recess made in the groove. 2. The wedge gate valve according to claim 1, characterized in that the stopper is made in the form of screws installed in the groove and in the recesses.

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