RU2353842C1 - Regulator - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: regulator includes body with inlet and outlet channels. Flat slide gate with hole and insert are installed in seat. Slide gate is connected with actuator rod. Unloading rod is located at side opposite to actuator rod. The latter is connected with flat slide gate. Unloading rod diametre is equal to actuator rod diametre. Its lower part is located outside body. It is made as toothed rack. In the body behind the seat and in axial alignment with it, identical seat with installed in it flat slide gate having hole and insert is located. The latter are turned by 180 degrees and installed being able to move in direction opposite to flat slide gate shift under action of actuator rod. Flat slide gate at unloading rod side is connected with identical unloading rod, and at actuator side it is connected with additional unloading rod. Additional unloading rod diametre is also equal to actuator rod diametre. Toothed racks of both unloading rods are simultaneously engaged with gear wheel. The latter is freely mounted on axis.

EFFECT: reliability improvement and increase in durability of regulator operation.

1 dwg

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 oil and gas condensate fields in wells to control the flow rate of the transported medium.

Known straight-through adjustable nozzle designed primarily for installation on the mouth of oil and gas wells, consisting of two flat gates with holes located in a common housing having coaxial bore holes, while the gate drive is made in the form of one spindle, on which there are two threaded sections with a left-hand thread in the upper section and a right-hand thread in the lower one, the right-hand thread pitch being twice as large as the left-hand thread, and both threaded sections are connected with mating threads providing simultaneous ix both the vanes in the opposite direction (AS № 438,826, F16K 3/34, 31/50, 04.05.73).

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 F16K 3/00, priority from 10/17/75) .

The closest set of essential features selected as a prototype is a regulating device, in the housing of which with an inlet and outlet channels and a through hole in the saddle there is a flat gate with an opening connected to the actuator stem and an insert, while in the housing behind the saddle it is aligned the passage hole is a locking body, made in the form of a stepped sleeve with a sealing surface mounted with the possibility of axial movement and fixing it in extreme positions, and the holes I in the housing are made mating with the surfaces of the stepped sleeve with the formation of a cavity communicating with the inlet channel by an opening in the housing, while an additional seat is made in the outlet channel of the housing towards the closure body with the possibility of interaction with the sealing surface of the closure body, the inlet and outlet channels communicating with each other through the holes in the housing (patent No. 2240460, 7 IPC F16K 3/02, 04/02/2003).

Known devices can be used in oil and gas condensate fields with a nominal pressure of up to PN 32 MPa as gas flow control devices by changing the flow area (i.e. local hydraulic resistance). As a rule, the cross-sectional area of the device is much smaller than the cross-sectional area of the process pipeline on which it is installed, about 4-10 times, and the pressure drop on the regulatory body reaches a large value of up to 10 MPa, so that the device provides the maximum possible gas flow rate from the well . The reduction of the passage section is due to the need to lower the gas temperature during throttling, which is required by the gas preparation technology. The discovery of new oil and gas condensate fields (for example, Achimovskoye) with a nominal pressure of up to PN 50 MPa required the use of special control devices to ensure stable operation when the pressure drop across the regulatory body is up to 20 MPa. The use of known devices in such difficult conditions will lead to a decrease in the reliability of their operation, increased wear and, consequently, a reduction in the service life, which is a drawback of these devices.

The problem achieved by the invention is to create such a technical solution, by using which increased reliability and increased durability of the device.

To achieve the named technical result, a flat gate with a hole connected to the actuator rod and an insert are installed in the saddle of the control device with an input and output channels and a through hole in the saddle.

The inventive control device differs from the prototype in that on the side opposite to the actuator rod there is an unloading rod connected to a flat gate, the diameter of which is equal to the diameter of the actuator rod, and its lower part located outside the housing is made in the form of a gear rack, while the body behind the saddle, coaxial to it, has an identical saddle with a flat gate installed in it with an opening and an insert, the latter being rotated 180 degrees and installed with the ability to move to the side, against opposite to the movement of the flat gate by the drive rod, while the flat gate from the side of the unloading rod is connected to an identical unloading rod, and from the side of the drive to an additional unloading rod, the diameter of which is also equal to the diameter of the actuator rod, and the gear racks of both unloading rods are simultaneously engaged a gear wheel freely mounted on the axle.

The invention is shown in the drawing, which shows a longitudinal section of the device in the closed position.

The device comprises a housing 1 with an input 2 and an output 3 channels and a through hole 4. A saddle 5 with an opening 6 is located inside the housing. A flat slide 8 with an opening 9, a liner 10 and a sealing element 11 sealing the sealing surfaces of the liner and saddles over the entire range of regulation. The flat gate is connected to the rod 12 of the drive 13. From the side opposite the stem of the drive, the flat gate is connected to the unloading rod 14, the diameter of which is equal to the diameter of the actuator rod, and its lower part 15, located outside the housing, is made in the form of a gear rack 16.

In the housing behind the saddle, it is aligned with the identical saddle 5 with the hole 6, in which there is a flat gate 8 with the hole 9, the liner 10 and the sealing element 11, which seals the sealing surfaces of the liner and saddles over the entire control range, which are the second stage of regulation. The flat gate with the hole and the liner are rotated 180 degrees and installed with the possibility of movement in the direction opposite to the movement of the flat gate with the actuator rod. The flat gate on the side of the unloading rod is connected to an identical unloading rod 14, and on the side of the drive, to an additional unloading rod 17, the diameter of which is also equal to the diameter of the actuator rod. The gear racks of both unloading rods are simultaneously engaged with a gear wheel 18 freely mounted on the axis 19. The unloading rods and an additional unloading rod are installed, like the drive rod, in the T-shaped grooves of the flat gates.

The device operates as follows. If it is necessary to control (increase) the flow rate of the transported medium, a corresponding signal is supplied to the actuator 13, the rod 12 of which moves the flat gate 8 with the liner 10 and the unloading rod 14 downward relative to the saddle 5 and the gear rack 16 rotates the gear wheel 18 freely mounted on the axis 19. At the same time with this, the gear wheel 18, turning on the axis 19, moves the gear rack 16 of the unloading rod 14, a flat gate 8 with a liner 10 (second stage of regulation) and an additional unloading rod 17 up. As a result of this, the openings 6 in the saddles 5 are partially partially synchronously opened by the sliders 8 with inserts 10 and a two-stage regulation (increase) of gas flow occurs, in which the total pressure drop across the control device is evenly distributed between the two control stages.

Thanks to this design, reliability is increased and the durability of the control device is increased.

Claims (1)

A regulating device, in the housing of which with an inlet and outlet channels and a bore in the saddle there is a flat gate with an opening connected to the actuator rod, and an insert, characterized in that on the side opposite to the actuator rod there is a discharge rod connected to a flat gate, the diameter of which is equal to the diameter of the actuator stem, and its lower part, located outside the housing, is made in the form of a gear rack, while in the housing behind the saddle, aligned with it, there is an identical saddle with installed in it an outer gate with an opening and an insert, the latter being rotated 180 ° and mounted to move in the opposite direction to the movement of the flat gate by the actuator rod, while the flat gate on the side of the unloading rod is connected to an identical unloading rod, and on the side of the drive, with an additional unloading a rod, the diameter of which is also equal to the diameter of the actuator rod, and the gear racks of both unloading rods are simultaneously engaged with a gear wheel freely mounted on the axis.