SU1610178A1 - Slide gate - Google Patents

Abstract

This invention relates to stop valves. The aim of the invention is to increase reliability by reducing the pressure of the water hammer when opening and closing the valve. When a signal is sent to close the valve, the hydrotreater 9 communicates the over-piston cavity 7 of the hydraulic cylinder 5 with the pressure pipe 1. The piston 6 moves the locking member 3 via the stem 4. working environment and the speed of movement of the valve. In the last stage of closing, the working medium is supplied only through the rigid axial channel of the elastic tube, which ensures smooth movement of the closure member. 3 il.

Description

(21) 4306892 / 30-29

(22) 16.09.87

(46) 11/30/90. Bul No. 44

(71) Volzhsky Scientific Research. Sky Institute of Hydraulic Engineering and Land Reclamation

(72), Koshkin and Vovokoshka

(53) 621.226 (088.8)

(.56) USSR Author's Certificate No. 1432304, cl. F 16 C 47/02, 1986.

(54) GATE VALVE

(57) The invention relates to stop valves. The object of the invention is to increase reliability by reducing the pressure of the surge when opening and closing the valve. When applying for closing the valve, the hydrotreater 9 communicates the over-piston cavity 7 of the hydraulic cylinder 5 with the pressure pipe 1. The piston 6 moves the locking member 3 by means of the stem 4. medium and speed of movement of the locking organ. At the last / closing stage, the working medium is supplied only through the rigid axial channel of the elastic tube, which ensures smooth movement of the closure member. 3 il.

1f

cl

about:

00

The invention relates to stop valves and can be used in heat and water supply systems.

The purpose of the invention is to increase reliability by reducing the pressure of the water hammer when opening and closing the valve.

Fig, 1 shows the valve, cut; FIG. 2 is a section A-A on 10 of FIG. one; FIG. 3 is a section BB in FIG. one .

The valve contains mounted on the pressure pipe 1 (Fig. 1) body 2 with a locking body 3, connected to the cylinder 4 of the hydraulic cylinder 5 o The piston 6 is placed in the hydraulic cylinder 5 with the formation of the over-piston 7 and sub-piston 8 cavities. The hydraulic cylinder 5 is controlled by means of the hydraulic valve 20, the throttle 10 is installed in the supply line of the working medium in the piston cavity 7 of the hydraulic cylinder 5,

The rod 4 of the hydraulic cylinder 5 is made with the rail II (FIG. 2), having 25 pro-12 threads 12c with a variable length profile. The choke 10 is made in the form of an elastic tube 13 (FIG. 3) with connecting nipples 14 and 15, having an axial rigid channel 16o ZO Elastic pipe 13 is installed .. between booster elements 17, interacting with the edges of the slot 12 of the rail 1 1.

The latch works as follows.

When a signal is applied to the closing of the valve, the hydrotreater 9 communicates the over-piston cavity of the hydraulic cylinder 5 through the throttle 10 with the pressure pipe 1, and the sub piston cavity 8 - with the drain. The piston b by means of the rod 4 moves the locking organ 3 in the direction of blocking the passage through the g section of the body 2. At the same time, the rod 4 moves the rod 11, which ensures compression of the elastic tube 13 by means of bolt-shaped elements 17 interacting with the edges of the slot 12.

The profile of the slot 12 is selected taking into account the parameters of the shut-off pressure pipe 1 to implement the required law of change in the speed of the shut-off member 3, which prevents the medium from increasing pressure above the allowable value. the cross section of which ensures smooth, unstressed movement of the locking member 3 at the moment of complete overlapping of the flow area of the housing 2.

The opening of the valve begins with the switching of the hydrorelay 9 and is carried out in reverse order. In this case, the bleeding of the working medium from the piston cavity 7 of the hydraulic cylinder 5 is carried out at the initial moment only through the hard channel 16 of the throttles 10, which ensures a smooth slow movement of the locking member 3, eliminating the shock filling of the pipeline after the valve.

Claims (1)

Invention Formula A valve containing a housing mounted on a pressure pipe with a shut-off valve connected to a hydraulic cylinder rod controlled by a hydraulic relay, a throttle installed in the supply line of the working medium into the hydraulic cylinder super-piston cavity and interacting with the latter in order to increase reliability by reducing the pressure of the surge when opening and closing, the cylinder stem is made with a rail having a slot with a variable length profile, and the throttle is made in the form of an elastic tube rigid axial channel established between the constraining elements that interact with the edges of the rail slot. sixteen 13 one 1610178 Aa FIG. 2 15