RU2246063C1 - Control device - Google Patents

Abstract

FIELD: valving.

SUBSTANCE: control device comprises flat gate with holes and sealing member arranged in the housing. The flat gate is mounted on the rod of the drive for permitting simultaneous rotation about it and movement along the seat when in it rotates.

EFFECT: simplified design and enhanced reliability of the device.

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Description

The invention relates to pipe fittings, and in particular to disconnecting devices with a locking element that makes a sliding movement along the saddle surface between the inlet and outlet channels, and can be used for installing underground gas storage stations (LNG) in gas wells to control the flow of natural gas during sampling and for pumping gas with minimal hydraulic resistance.

Known regulating fitting containing a housing with inlet and outlet openings, coaxially with which with the possibility of translational movement along the guide surfaces installed flat gates associated with the drive and having coaxial holes. (A.S. No. 438826, class F 16 K 3/34, 1973)

Known locking and regulating device, in the housing of which with a through hole in the saddle there is a flat gate with an opening connected to the actuator stem and a liner (AS No. 785579, 4 IPC F 16 K 3/00, 17.10.75).

At an underground gas storage facility, gas production from a well alternates with gas injection into the well by compressor units. Known devices can be used at an LNG plant to control the gas flow rate when it is taken from the wells, and, as a rule, the area of the flow cross section of the devices is much smaller than the cross-sectional area of the pipelines on which they are installed, but they are a significant obstacle when injecting gas into the wells, which creates a loss pressure.

A disadvantage of the known devices is their low reliability and efficiency, due to the fact that when injecting gas into the well, additional energy costs of compressor units are required to overcome the significant local hydraulic resistance created by the device.

The closest set of essential features selected as a prototype is a shut-off and control device comprising a housing with coaxial inlet and outlet nozzles, with a saddle and a flat gate with an opening and a sealing element mounted therein that can be moved by means of a rod drive along the guides made in the saddle, while the saddle is mounted on the axis with the possibility of rotation on it (AS No. 1587301, 4 IPC F 16 K 3/00, priority from 05.26.88).

The disadvantage of this device is the design complexity, due to the fact that when the gas is taken from the well, the rod is fixed in a flat gate, and when gas is injected into the well, it is released with a flat gate.

The problem achieved by the invention is to create such a technical solution, using which would simplify the design of the device and ensure its reliability.

To achieve the named technical result, a saddle and a flat gate with a hole and a sealing element are mounted in the housing of the regulating device with input and output channels, which are mounted with the possibility of movement by means of the actuator rod along the guides made in the saddle mounted on the axis with the possibility of rotation on it.

The claimed control device differs from the prototype in that the flat gate is mounted on the actuator stem on an axis with the possibility of simultaneous rotation on it and movement along the saddle when it is rotated.

The invention is shown in the drawing, where in Fig.1 shows

longitudinal section of the device in the open position when taking gas from the well, figure 2 is a view a in figure 1 (cover removed), figure 3 is a longitudinal section of the device when injected into the well.

The device comprises a housing 1 with input 2, output 3 channels and a sealing element 4. Inside the housing on the axis 5 there is a saddle 6 with a hole 7, a fixed liner 8, a sealing element 9 and rails 10. In the saddle between the rails there is a flat gate 11 with a hole 12 , liner 13 and sealing element 14, sealing the sealing surfaces of the gate and the stationary liner over the entire control range. The housing is closed by a cover 15 with an emphasis 16. A flat gate is mounted on the stem 17 of the actuator 18 on the axis 19.

The device operates as follows. When taking gas from the well, the saddle 6 and the flat gate 11 under the action of high-speed pressure and pressure drop of the gas are pressed against the sealing element 4 of the housing 1.

If it is necessary to control the flow rate when taking gas from the well, a corresponding signal is supplied to the actuator 18, the rod 17 of which moves the gate 11 with the liner 13 and the sealing element 14 relative to the stationary liner 8 down, as a result of which the hole in the stationary liner 8 is partially closed by the gate 11 with the liner 13 and there is a regulation (reduction) of gas flow.

If necessary, the gas is injected into the well, the corresponding signal is supplied to the actuator 18, the rod 17 of which moves the gate 11 with the liner 13 and the sealing element 14 relative to the stationary liner 8 upwards, to the highest position corresponding to the maximum gas flow rate during sampling.

Subsequently, when gas is injected into the well, the saddle 6 with the fixed liner 8, the sealing element 9 and the guides 10 under the action of high-speed pressure and pressure drop on the fixed liner 8 is rotated on the axis 5, which is why at the same time the flat gate 11 with the liner 13 and the sealing element 14 moves along the guides 10 along the stationary liner 8 down and rotates on the axis 19 until it reaches the stop 16, opening the gas passage from the outlet 3 to the inlet 2 channel with significantly lower hydraulic resistance m To fully open the passage when injecting gas into the well, the angle of rotation of the saddle 6 will be ~ 15-20 degrees. The simultaneous rotation of the saddle 6 and the gate 11 is provided due to the oval holes made in them under the axes 5 and 19, respectively.

Thanks to the installation of the gate on the actuator stem on the axis, the design is simplified and the reliability of the device is ensured.

Claims (1)

A control device comprising a housing with input and output channels, with a saddle and a flat gate located in it with an opening and a sealing element mounted to move by means of the actuator rod along guides made in the saddle mounted on the axis with the possibility of rotation on it, characterized in that a flat gate is mounted on the actuator stem on an axis with the possibility of simultaneous rotation on it and movement along the saddle when it is rotated.

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