SU1314173A1 - Valve unit - Google Patents

Abstract

The invention relates to the field of pipeline valves and can be used for the operation of wells in the extraction of fluid. The purpose of the invention is to increase reliability by preventing seizure and reducing wear of the closure member and damper valve assembly. The locking body 3 is made in the form of folding half-disks 11 mounted on a common axis 10, pivotally connected by means of t g 12 to a deaf bottom 5 of the cylinder (C) 4. Nadvorshchnev 8/5 chamber (L

Description

is connected to the cavity 2 of the housing 1 by means of the holes 13. In such an execution, the movement of the C 4 occurs smoothly without water hammer, and the Invention relates to pipeline fittings and can be used for the operation of wells during fluid production or reclamation.

The aim of the invention is to increase reliability by preventing seizure and reduction of wear of the locking valve opfaHa and damper of the valve assembly.

Figure 1 is a diagram of the valve assembly, a longitudinal section; figure 2 - section A. A. fig.K

The valve assembly comprises a housing 1, in the cavity 2 of which there are: a locking member 3 and a hydraulic damper including a cylinder 4 with a deaf bottom 5 and a spring-loaded piston 6 equipped with a throttling channel 7 and installed in the cylinder 4 with the formation of a piston 8 and sub piston 9 chambers. The piston 6 is fixedly mounted in the housing 1, the locking member 3 is made in the form of folding half-disks 11 mounted on a common axis 10, hinged 12 via 12 to the deaf bottom 5 of the cylinder 4, with holes 13 in the upper part of the latter The chamber 8 is connected to the cavity 2 of the housing 1 by means of the said openings 13. The piston 6 is preloaded by the spring 14. The valve assembly is installed at the outlet of the pump, for example, a well (not shown), in the column 15 of the lifting pipes.

Valve node works as follows.

Before starting the pump half discs; 11 open and overlap the flow area of the housing 1 of the valve assembly. When the pump starts operating, the pressure under the locking organ increases, which leads to the fact that the half disks 11 begin to open, creating a lifting force acting through the pulls 12 on the cylinder 4 of the hydraulic damper. Fluid located in the piston

however, particles and sand are prevented from entering the gap between the C 4 and the piston 6 of the hydraulic damper. 2 Il.

0 5

0 5

five

chamber 9 through the throttling channel

7 is preempted into the super-piston chamber

8 and out of it through the holes 13 into the cavity 2 of the housing 1. As a result, the cylinder 4 of the hydraulic damper moves forward smoothly, overcoming the resistance of the fluid and the springs 14. As the half-discs 11 of the locking member 3 converge, the flow rate of the liquid supplied to the column 15 increases, resulting in an increase in the flow rate and a decrease in pressure in the annular gap between the housing 1 and the cylinder 4 of the damper. As a result, the liquid from the over-piston chamber 8 will be sucked off, ensuring the cylinder 4 moves to the upper position and the half-disks 11 are fully folded, thereby causing the valve body 3 to provide minimal resistance to the movement of the fluid during pump operation. The ejection effect at the same time allows to prevent particles of mechanical impurities and sand from entering the gap between the cylinder 4 and the gearbox 6 of the hydraulic damper.

When the pump stops under the action of the spring 14 and the liquid column in the column 15, the cylinder 4 moves downwards, the thrust 12 separates the half-discs 11 of the locking member 3. The valve section flow area is gradually closed due to throttling of the liquid entering the sub-piston chamber 9 in channel 7, thus preventing the occurrence of a water hammer.

When the valve assembly is in operation, sand is prevented from escaping when the well is started, due to which no blockage and wear of the closure member and damper occur.

Claims (1)

Invention Formula Valve Assembly, comprising a housing, in the cavity of which are located 3131 a shut-off valve and a hydraulic damper, including a blind bottom cylinder and a spring-loaded piston, equipped with a throttling channel and installed in the cylinder to form a chuck and sub-piston chambers, characterized in that, with the aim of increasing reliability by preventing jamming and reducing wear of the block and 41734 the damper, the piston is fixedly mounted in the housing, the locking member is made in the form of folding half-discs mounted on a common axis, a ball5 is connected to the deaf bottom of the cylinder through the blind bottom, while in the upper part of the latter there are holes K to the piston chamber connected holes. Editor E. Sligan Compiled by G. Bogomolny Tehred A. Kravchuk Proofreader A. Vorovich Order 2199/41 Circulation 812 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 (Pus. 2