RU2259465C1 - Choke and gate valve - Google Patents

Abstract

FIELD: oil production industry, particularly for sealing pipelines in well-control equipment.

SUBSTANCE: valve has body with central orifice located in upper part thereof, elongated rectangular cavity, coaxial channels for liquid and annular depressions formed in seat areas located in bores of coaxial channels and pressed with resilient members to gate. Valve also has drive with handwheel, axle box, spindle passing through central orifice of upper body part and sealing member embedded in body cavity. Gate is composed of two body halves and body with grooves for receiving sealing member formed of elastic material made on side surfaces around the full perimeter thereof. The rectangular cavity is through. Cavity for sealing member receiving created in the body has conical inner surface. Lower parts of body halves are provided with threaded orifices with caps defining coaxial channels. Transversal orifice with choke is formed in lower gate part and longitudinal threaded orifice for spindle engagement is made in upper choke part.

EFFECT: extended range of valve application.

1 dwg

Description

The invention relates to the oil industry and is intended for sealing pipelines in gushing and other equipment of the wellhead and for regulating the flow of the working medium into the reservoirs or reservoir.

As a locking and regulating device, a ball valve with replaceable chokes is known as KShD 65 × 21, developed by AK Corvet, Kurgan [1].

The ball valve consists of a housing connected to the cover by screws, a ball is placed inside with a side hole for a replaceable fitting. Movable saddles are installed on two supports in the annular bores of the body, the saddles are pressed with disk springs to the ball. To replace the fitting in the presence of pressure in the pipe in the housing 1, side holes are made. Manual control of the crane by turning the handle 90 °. The disadvantage is the difficulty in manufacturing.

Known valve butterfly valve ZDSH 65-210 with interchangeable throttles, developed by PKF "Tekhnovek", Votkinsk [2].

The disk valve consists of a body, two half-bodies joined together by studs, spring-loaded saddles are installed in the annular bores of the half-bodies, a disk-gate with an opening for interchangeable fittings is located in the cavity between the half-bodies and saddles. To replace the nozzle in the presence of pressure in the pipe in the half-shells, openings are made, closed with threaded plugs. Manual control of the valve, turning the handle 540 °. The disadvantages of the valve are its large size and complexity in manufacturing.

Known as the closest analogue gate full bore valve. [3]

This valve contains a one-piece molded case with a central hole in the upper part, an elongated rectangular cavity, holes that form coaxial channels for fluid flow, and annular recesses in the area of the seats located in the bores of the coaxial channels and pressed by elastic elements to the gate, a drive with a steering wheel, and a groovebox , a spindle passing through a central hole in the upper part of the housing, a seal folded into the cavity of the housing.

The disadvantage of the closest analogue is the complicated design of the spindle seal, and when the valve opens and closes, the housing is under high fluid pressure. Maintainability of a valve of this design is low, i.e. have to reject saddles and gates.

The technical result of the invention is the expansion of the technological functions of the valve, simplifying the sealing of the spindle, improving the maintainability of the valve and the safety of work during its maintenance.

The specified technical result is achieved in that the valve comprising a housing with a central hole in the upper part, grooves on the lateral surfaces around the perimeter for seals of elastic material and an elongated rectangular cavity made through, two half-bodies with holes forming coaxial flow channels combined into the composite housing with studs and nuts, a gate having a transverse hole with a fitting at the bottom and a longitudinal threaded hole at the top for connecting to a spindle passing through Res central opening in the top of the housing, a seal attached to the body cavity which has an internal conical surface, and the packing follower with the drive wheel, is provided with seats arranged in coaxial bores channel half-shells and is pressed by the elastic members to the slide. The half-bodies have threaded holes with plugs at the bottom, forming coaxial channels for removing and installing fittings with the transverse bore of the gate, and the gates and seats have geometrical dimensions, in which, during the opening and closing of the valve, high-pressure fluid in the cavity of the composite housing misses.

(L NS - d VS) / 2-dш ≥ 6 mm,

where D n.s. - outer diameter of the saddle;

d c.c. - inner diameter of the saddle;

d W - diameter of the fitting.

The combination of these features ensures the achievement of the goal. The composite body provides high maintainability of the valve - the seat, gate and body can be polished several times.

The cavity of the housing for the spindle seal has an internal conical surface, which simplifies the seal design - in the context of a rectangle.

The holes in the lower zone of the half-shells and the gate form coaxial channels for removing and installing the fittings at high pressure in the line - this extends the technological functions of the valve.

Due to the design features of the seats, the gate and the body, there is no high-pressure fluid in the cavity of the composite body - this makes the work of replacing the fittings safe.

The drawing shows a General view of the proposed slide gate valve.

The valve comprises a housing 1 and two half-bodies 2 with openings forming coaxial flow channels 3, having through holes at the edges, in which studs 4 with nuts 5 are installed, in the central part of the housing 1 there is a through elongated rectangular cavity 6 in which the gate 7 is inserted, in the upper part, a hole 8 for the spindle 9 and a cavity with an inner conical surface 10 for seals 11, on the side surfaces 12 around the entire perimeter of the groove for the seal 13 of elastic material, and in the area of the seats 14 ring recesses 15. The gate 7 has a lower parts of the transverse hole 16 with the fitting 17, and in the upper part of the longitudinal threaded hole 18 for connection with the spindle 9.

In the annular bores of the coaxial channels of the half-shells 2, saddles 14 are inserted 14. preloaded by the elastic elements 19 to the gate 7. In the half-shells 2 in the lower part there are threaded holes 20 that form the coaxial channels 21, plugs 22 are installed in them. The spindle 9 is rotated by the actuator 25 with the helm 26.

The valve is assembled as follows. The drive 25 with the spindle 9 and the steering wheel 26 is assembled separately. A slide 7 is inserted into the cavity 6 of the housing 1, seals 11 are inserted into the cavity with the inner conical surface 10. A packing follower is put on the spindle 9. The threaded end of the spindle 9 is inserted through the seals 11, the hole 8 in cavity 6 of the housing 1 and wrap it in the gate 7. Fasten the actuator 25 with bolts to the upper part of the housing 1. In the annular bores of the half-shells 2, elastic elements 19 and seats 14 are inserted. Seals 13 are inserted in the grooves on the side surfaces 12 of the housing 1. Half-shells 2 in with the nut is applied to the lateral surfaces 12 of the housing 1 assembly, studs 4 are inserted into the through coaxial holes along the edges of the half-shells 2 and the housing 1 and the nuts 5 are tightened, while due to the presence of annular recesses 15 in the housing 1, the seats 14 are pressed against the gate 7. Grundbuks 23 press against the seals 11 with bolts 24. Rotating the steering wheel 26, move the gate 7 to the lower position. A plug 22 is screwed into one threaded hole 20 in the lower part of the half-shell 2, a fitting 17 is inserted into another hole 16 of the gate 7 and the second plug 22 is wrapped in another half-shell 2.

The proposed valve design, having a composite housing, provides high maintainability of the product due to the ability to grind the seats 14, gate 7 and the housing 1.

The cavity of the housing 1 under the seal 11 has an inner conical surface 10. This simplifies the design of the seal 11.

The threaded holes 20 in the lower zone of the half-shells 2 and the opening 16 of the gate 7 form coaxial channels 21 for removing and installing the fittings 17 at high pressure in the line. This extends the technological functions of the valves.

The design features of the seats 14, the gate 7 and the housing 1 prevent the ingress of high pressure fluid into the cavity 6 of the composite housing, which makes the replacement of fittings 17 safe.

The proposed design of the valve can be manufactured and mounted in the fountain fittings by the same means as the well-known designs of choke valves and valves. This, together with a positive effect, indicates the industrial suitability of the invention.

Sources of information

1. Ball valve with replaceable chokes DN 2 ... 18; En21 Operating Instructions. 7 AN.08.000 RE.

2. Latch steel disk ZD 65-210 RE; ZDSh 65-210 RE; ZD 65-80 RE, Operation manual.

3. RU 2047732 C1 (Andrianov S.V.), 11/10/1995.

Claims (1)

A valve containing a housing with a central hole in the upper part, an elongated rectangular cavity, coaxial channels for fluid flow and annular recesses in the area of the seats, located in the bores of the coaxial channels and drawn by elastic elements to the gate, a drive with a steering wheel, a packing follower, a spindle passing through the central a hole in the upper part of the body, a seal embedded in the body cavity, characterized in that the valve is made up of two half-bodies and a body with grooves for elastic sealing material on the lateral surfaces around the entire perimeter, an elongated rectangular cavity is made through, the housing cavity into which the seal is embedded - with an internal conical surface, threaded holes with plugs forming coaxial channels are made in the lower part of the half-cases, the gate has a transverse hole in the lower part with a fitting and in the upper part there is a longitudinal threaded hole for connection to the spindle, and the geometric dimensions of the saddle and gate are in the following relationship:

where D _ns - the outer diameter of the saddle; d _v.s - the inner diameter of the saddle; d _W - diameter of the fitting.