SU1352138A1 - Check valve - Google Patents

Abstract

The invention relates to the field of fittings. The aim of the invention is to increase the reliability of operation by providing a non-impact valve closing. With a reverse flow of the medium, the finger 13 of the earring 14 moves into the groove of the lever 9, which with the disk 6 is held in the initial position by the damper. When the disk 5 reaches the position at which the finger, 13 moves to the extreme position along the groove, both disks 5 and 6 move together, while their movement is slowed down by the damper. 6 Il. sl sd o so s oo srig.Z

Description

This invention relates to pipe fittings.

The purpose of the invention is to increase the reliability of operation by providing a smooth, non-impact shut-off valve.

FIG. 1 shows a non-return valve, a general view in partial section; in fig. 2 is a section A-A in FIG. 1 with a shaft view, CBJJ-zanny, with a damper; on. FIG. 3-6 are a view of the check valve block in various stages of closure.

The check valve includes a housing with bushing 2 and a saddle 3.

In the housing 1 is placed the locking body 4, made in the form of disks 5 and 6.

The large-diameter disk 5 has a central passage hole 7 which is blocked by a small-diameter disk 6. The disks 5 and 6 are connected by levers 8 and 9 with a rotary shaft 10, the large diameter disk 5 being mounted on the shaft 10 freely, and the disk 6 being rigidly connected through the rotary shaft 10 to the damper 11.

The lever 9 has a longitudinal groove 12 in which it is movably placed, ei a finger 13, rigidly connected to one end of the earring 14. The other end of the earring 14 is connected by a hinge 15

lever

Reverse running c. ieji, yion.ihm way.

When the working medium flow was applied under the action of the differential pressure, the shut-off organ 4 iiCiii A ieiiUiOTCH to the open position opened the flow section 3 (. 3).

For 1; the replica of the direct and the occurrence of the reverse liOTOKa disk 5 with the lever 8 rotates around the fixed shaft 10 according to the clock 1 st, the finger 13 of the earring 14 moves in 1a 12 of the lever 9, and the lever 9 s

the disk 6 is held in the initial position by the damper I. When the disk reaches the 5 position, at which the finger 13 moves to the extreme position along the groove

(Fig. 4), the disks 5 and 6 move together under the action of reverse flow and its own weight. At the same time, their movement is slowed down by the damper 11. Such a slow movement occurs before the large disk 5 seats on the saddle 3 (Fig. 5). Wherein

The bore section of the saddle 3 is not blocked, as the central bore hole 7 in the large disk 5 remains open, preventing the reverse flow of the medium from completely stopping and protecting the system from water hammering. Subsequently (under the action of the medium) the small disk 6 is moved until the saddle 3 is completely blocked (Fig. 6).

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five

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Claims (1)

Invention Formula () a braided valve, comprising a housing with 1C) elbows, a saddle and a swivel locking body made in the form of two disks of different diameters, a larger diameter disk made with a central hole, overlapped by a smaller diameter disk, and m both disks are connected with autonomous levers shaft, disk is large; its diameter is mounted on the shaft freely, and the disk of smaller diameter is connected, -; a rotary shaft with a damper, characterized in that, in order to increase the reliability of operation, a longitudinal groove is made in one of the levers, the levers are interconnected by a link, one end of which is movably placed in said slot, and the other hinge is connected with the second lever. four figl 2 -9 t CpuS.-U Compiled by G. Ivanov Reducer D. Re Intehred I. VeresKorrektor I. Zak 526b; 31 Circulation 804Subscription E NIIPI USSR State Committee for Invention and Ot1m) Ytin 1 13035, LA, ZH-35, 1 aupolsk iab .. d. -1 a Production and Printing Enterprise, Uzhgorod, ul. Design,}