RU35402U1 - Parallel valve - Google Patents

Description

LATERAL PARALLEL

The utility model relates to the mechanical engineering sub-branch of valve manufacturing, to the gate valves installed on the pipeline for transporting oil and oil products.

Known gate valve (SU, AS No. 748075, class F16K3 / 316, 1978), in the housing of which a shutter is mounted and a spring-loaded clip interacting with it located between the sealing surfaces of the seats and the limit stops fixed above it, equipped with plates, interacting with the bracket. This design prevents staple skew, as well as the formation of sediment in stagnant zones.

The disadvantage of the valve is its unsatisfactory maintainability, which is due to the complexity of removing the staples from the body.

Another valve is known (RU, application No. 2002123718, class F16K3 / 316, 2002) in which each of the limit stops for the end ends of the bracket is made collapsible, containing the actual limit stop with a shield attached to it, and the stop is attached to the housing gate valves rigidly through the base.

The disadvantage of the valve is the difficulty of disassembling the thrust elements that occurs due to the impact of the transported medium on them, which leads to clogging and jamming of the fasteners.

The objective of the utility model is to create a reliable design that eliminates the disadvantages of known analogues.

The technical result is achieved by the fact that in the known valve, restrictive stops are not used, and when opening the passage channel instead of the spring, the return movement of the bracket is provided by the action of the shutter on each of its end ends by means of a thrust in the form

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Parallel valve

studs located in the coaxial holes of the shutter eye and the end end of the bracket, with the possibility of sliding the shutter eye on it. The rod at one end is rigidly fixed relative to the bracket by means of a fixing screw, and a nut is screwed onto the other end, forming a stop for the shutter eye.

To protect against the penetration of mechanical impurities of the transported medium under the protective bracket and to prevent the formation of sediment in the stagnant zones, the bracket is sealed relative to the housing from each end in the cavity between the seats with a spring-loaded shield fixed at one end to the housing wall in the direction of the cover.

In FIG. 1 - combined image of the valve in the context of the longitudinal axes of the main pipes; the passage in the housing is open on the left and closed on the right.

In FIG. 2 - combined image of the valve in the cross section across the axis of the main pipes; the passage in the enclosure is closed on the left and open on the right.

In FIG. 3 is a fragmentary view of the connection rod with the bracket and the eye of the shutter

The valve includes a cover 13, the housing 1 (see Fig. 1) in the internal cavity of which is installed a parallel double-disk shutter 2 connected to the spindle 3 by means of a sleeve 12. The shutter 2 and the bracket 4 are installed between the sealing surfaces of the seats 5 in the passage of the housing 1.

Each of the end ends of the bracket 4 (see Fig. 2) is provided with a threaded hole 8, into which one end of the rod 10 is screwed, which, in turn, is located in the hole 7 of the shutter eye 6, coaxial with the hole of the bracket 8, with the possibility of sliding the eye 6 along the draft 10, while mixing the shutter 2. The bracket 4 from each side end is sealed relative to the housing 1 in the cavity between the seats 5 using

Parallel valve

spring-loaded flap 9 with one end fixed to the housing 1 in the direction of the cover 13.

A nut 14 with a larger diameter is screwed onto one end end of the link 10 (see FIG. 3) than in the holes 7, thereby forming a stop for the eye 6 of the shutter 2, raising the bracket 4, when opening the passage channel. At the other end, the rod 10 is rigidly connected to the bracket 4 by means of a locking screw 11.

The valve operates as follows. When the passage is blocked in the housing 1, the shutter 2 moves to the position between the saddles 5 and acting on the bracket 4, pushes it below the level of the main pipes, thereby eliminating possible gaps in the passage channel.

When opening the passage in the housing 1, the shutter 5 moves to the backup part of the housing 1 and the cover 13. The bracket returns to its initial position when the passage channel is fully opened, when the shutter eye reaches the stop nut 14 on the link 10 and continues to move under the action of the spindle bracket 4 to the level of the trunk pipes. The bracket 4, when moving, acts on. the sealing flap 9 compressing the spring element under it. The latter provides a tight connection of the adjacent surfaces of the bracket 4 and the shield 9, thereby preventing the penetration of large particles of the medium under the bracket 4.

This design allowed to increase the maintainability of the valve, as well as to provide higher reliability of the product in operation.

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Parallel valve

Claims (4)

1. A valve containing a housing, in the inner cavity of which a shutter with a spindle is installed and a protective bracket between the sealing surfaces of the housing seats, mounted for translational movement under the action of the shutter, characterized in that the shutter interacts with the bracket by means of rods when opening the passage channel, each which is located in the coaxial holes of the bracket and the eye of the shutter with the possibility of sliding of the latter along the rod. 2. The valve according to claim 1, characterized in that the thrust is made in the form of a stud, on the ends of which nuts are screwed. 3. The valve according to claims 1 and 2, characterized in that one end of the stud located in the hole of the bracket makes a threaded pair with it and is rigidly fixed by means of a stopper. 4. The valve according to claim 1, characterized in that the bracket on each side end is sealed relative to the body in the cavity between the seats with a spring-loaded flap, one end of which is rigidly fixed to the body in the direction of the cover.