RU185727U1 - Gate valve for high pressure fittings - Google Patents

Abstract

The utility model relates to mechanical engineering, namely to valve manufacturing, in particular to valves of pipeline valves, and is intended for use in high pressure pipelines for various working environments of the oil and gas refining industries. The technical result is manifested in reducing the cost of the structure while maintaining its reliability and efficiency. The specified result is achieved by the fact that in the gate valve of high pressure pipe fittings, in the bore holes of the body, on both sides of the central hole, a number of bores of different diameters are made. One of the bores is made conical, used for rolling saddles in the body. In addition, the lid is combined with a welding stand made of metal, on one end of which a mounting sleeve is welded, equipped with through holes, one of which is threaded, and on the other end, a mounting sleeve, equipped with a through central hole and mounting holes, is welded equipped with a thread, while using a mounting sleeve, the welding stand is connected to the control.

Description

The utility model relates to mechanical engineering, namely to valve manufacturing, in particular to valves of pipeline valves, and is intended for use in high pressure pipelines for various working environments of the oil and gas refining industries.

The author’s monograph by D.V. Gurevich is well-known, in which a general theoretical overview of structures and actuators of pipeline valves, materials used in valve manufacturing, the implementation of elements for assembling valve designs is presented, and a general approach to the design and construction of the main components and details of pipeline valves is investigated (DF Gurevich "Calculation and design of pipeline valves", Ed. 5th. - M.: Publishing house LKI. - 2008. - 480 p.).

Known valve containing a housing having a hollow T-shaped configuration, flanges on opposite coaxial tubular ends, a top cover with a central vertical part, seals, bolt elements for connection (US Patent No. 5878994. Publ. 03.09.1999).

Known locking fitting comprising an installation housing that forms a flow channel and a sliding chamber; a blocking element provided with an elastomeric lining; a sealing and / or installation device inside the extension of the neck of the housing, limiting the sliding chamber and rotatably connected with a threaded engagement with the nut spindle, which is connected to the blocking element. The blocking element consists of several parts, and at least one external dimension of the main body is slightly smaller than the nominal width of the flow channel. Sealing elements protrude beyond the outer dimension, are located on opposite supporting surfaces of the main body (Patent No. EP 1516138. Publ. 25.01.2006).

A wedge gate valve comprising a housing in which saddles and a locking element are placed and guides for the locking element are made in the form of protrusions with a figured section profile, the locking element being made with annular grooves for surfacing of the wear-resistant layer and longitudinal grooves for interaction with the guiding protrusions of the housing, the locking element is connected with the drive, the longitudinal grooves of the locking element are made curly with the lateral surfaces of the curved profile located equidistantly to the lateral surfaces of the upper part the guiding protrusions of the forged body, while the annular grooves for surfacing the wear-resistant layer are made by machining relative to the longitudinally shaped grooves, and the wall thickness between the bottom of the circular grooves and the side surfaces of the longitudinal shaped grooves increases in depth of the longitudinal shaped grooves (Patent No. 2243436 RU. December 27, 2004).

A wedge gate valve assembly containing a wedge, the sealing fields of which interact with the response fields of the seats, which are self-installing relative to the housing by means of deformable elements of the valve assembly, characterized in that the deforming element is gaskets installed between the seats and the housing (Patent No. 2362932 RU. Publ. 27.07. 2009).

A wedge gate valve is known, comprising a housing, an integral wedge and seats with sealing surfaces. The saddles rest on the shoulder of the body and are sealed relative to the body. The saddle surface resting on the shoulder of the housing is either conical or spherical. The center of the sphere is located inside the shutter. The housing collar surface interacting with the corresponding saddle surface is located at an angle of 90–25 ° or is made in the form of a chamfer. The method of assembly of the said shutter includes the installation of seats in the housing, followed by their fastening and sealing by welding. Before fixing the saddles in the housing, a wedge is first installed between the saddles. Then, the saddles and the wedge are self-installed relative to the body. As a result, the shutter metal consumption is reduced and the technology of its assembly is simplified (Patent No. 2151938RU. Publ. June 27, 2000).

However, in the known valve, a welding method, rather than rolling, was used to seal the seats in the housing during installation.

A wedge gate valve with self-aligning seats is known, comprising a body, a cover, and a spindle controlling a rigid wedge interacting with cylindrical step-shaped seats that are self-installing freely in the body bores and are sealed with respect to the latter from elastically deformable material, in which the cylindrical step of a smaller diameter of the seat is divided by longitudinal slots into petals, on the outer surfaces of which a shoulder or grooves are made with a profile close to the profile of a groove or drill and in the bore of the body (patent №2382923 RU. Publ. of 10.01.2010).

A wedge gate valve assembly is known, comprising a wedge, the sealing fields of which interact with the response fields of the seats that are self-aligning and fixed in the housing, in which bores are made in the housing coaxially to the passage channel, the end surface of which is either straight or with the cone in contact with the counter surface or conical, or the straight ends of the saddles placed in the bore of the body, and between these end surfaces there is a gasket made of an elastically deformable material, for example, polyurethane (Patent No. 2382923 RU. Publ. February 27, 2010).

A valve for high pressure media, comprising a housing with welded main flanges and a cover, a locking element associated with the actuator, in which the central flange of the forged housing is provided with recesses made in the same plane as the end surfaces of the housing, and is as close as possible to the axis of the main passage of the valve, and the forged cover is made dome-shaped, while the internal cavity of the cover copies the cross-sectional shape of the locking body, and the flange of the cover is removed from the central flange of the housing by an amount that provides the placement of fasteners of the cover without increasing the dimensions of its flange in the diametrical direction (Patent No. 2211391 RU. Publ. 27.08.2003).

However, the known valve has a high cost due to the use of a one-piece, made of steel, in one piece with a resistant bulky cover design, simple installation of seats in the body without rolling, which reduces tightness, can cause jamming of the working body and reduce its effectiveness.

The objective of this utility model is to expand the arsenal of pipe fittings used at high pressure.

The technical result is manifested in increasing the reliability of the valve during operation.

The problem is solved in that in the valve of the high pressure pipe fittings containing a housing connected by a weld to the main flanges, while the housing is equipped with coaxially located through holes and a central vertical hole in which one of the ends of the rod is located, with a wedge fixed to it, with the possibility of contact with the saddles, an actuator including a cover connected to the housing and located in it with a yoke node and a control element in the through holes of the housing, on both sides of the central hole, a series of bores of various diameters are made, one of which is conical, by means of which the seats are rolled, the lid is made separately with a welding stand made of metal, at one end of which a fixing sleeve is welded, equipped with through holes, one of which is equipped with a thread, and at the other end a mounting sleeve is welded, equipped with a through central hole and mounting holes, while the holes are equipped with a thread, except for second, with the retaining hub strut is connected to the welding control authority.

To increase the construction length of the valve, it is advisable to fix the mating flanges to the main flanges by means of ring gaskets.

The present utility model is explained in a detailed description, schemes in which:

FIG. 1 - shows an assembly drawing of a valve of high pressure pipe fittings, with a cut in a vertical plane, according to a utility model;

FIG. 2 is a main sectional view of the housing, the same as in FIG. one;

FIG. 3 - view A on a 2: 1 scale of a row of bores of different diameters of the inner surface of the body with one conical surface under the bore;

FIG. 4 - body in a perspective view, the same as in FIG. one;

FIG. 5 is a main view of a welding sleeve with a vertical plane cut, the same as in FIG. one;

FIG. 6 is a photograph of an assembled gate valve in a perspective view;

FIG. 7 - photo of the assembly of the welding sleeve;

FIG. 8 - assembly assembly with mating flanges.

The valve of the high pressure pipe fittings (hereinafter the valve) comprises a housing 1 (Fig. 1). The housing 1 is connected by a welding seam to the main flanges, respectively 2 and 3. Housing 1 is equipped with coaxially located through holes 4, 5 and a central vertical hole 6. The latter has one of the ends of the rod 7. At the end of the rod 7, a wedge 8 is fixed, which has the ability to contact with saddles 9 and 10. The actuator 11 is made of a cover 12, mounted on the housing 1 by means of pairs of connecting elements hairpin - nut. In the lid 12 is located the yoke 13, which is made of stuffing box seals and the pressure sleeve. The cover 12 is made separately with the actuator 11.

In the through holes 4 and 5 of the housing 1, on both sides of the central hole 6, a series of bores of different diameters are made (Figs. 2, 3, 4). Closer to the ends of the housing 1, in each of the passage openings 4, 5, respectively, cylindrical bores 14 and then conical bores 15 are made. Due to the connection of the seats 9, 10 by means of a flaring method, a tight connection is obtained while maintaining mechanical properties, increasing the reliability of the valve during operation, preventing jamming of the working body.

By means of the conical bores 15, the saddles 9 and 10 are sealed in the housing 1 (Fig. 1).

The actuator is made of a welding stand 16 made of metal, namely from a part of a steel pipe (Fig. 5). A fastening sleeve 17 is welded at one end of the welding stand 16, equipped with a through center hole and mounting holes. While the through central hole of the mounting sleeve 17 is equipped with a thread. At the second end of the welding stand 16, a mounting sleeve 18 is welded, equipped with stepped through holes, one of which is equipped with a thread. Such separate execution of the cover 12 and the welding stand 16, with the ends fixed to it by welding the fixing sleeve 17 and the mounting sleeve 18, increases the reliability of the valve during operation, reduces the cost of machining the welding rack 16 and, accordingly, the cost of the valve as a whole. Improving reliability is due to the prevention of skew due to the integrity of the welding sleeve 16, with the mounting sleeve 17 and the mounting sleeve 18 and, as a result, the prevention of jamming of the rod 7 in the process of using the valve.

Using the installation sleeve 18, the welding stand 16 is indirectly connected to the control (Fig. 1, 6). In addition, between each of the seats 9, 10 and the housing 1 is a gasket 19 of elastic material.

If necessary, to the main flanges 2 and 3, by means of connecting elements (stud-nut) and gaskets of oval section 20, mating flanges are fixed, respectively 21 and 22.

Pre-made of steel using the casting method, or hot stamping method, body 1, cover 12, main flanges 4, 5, counterflanges 21, 22 of the gate valve of high pressure valves, which are then machined to bring to the required size and frequency of the surface .

At the same time, a number of bores of various diameters are bored in the through holes 4, 5. The connection of the bore 14 with the previous bores of a smaller diameter is performed with a radius of 1 mm, and the conical bores 15, with respect to the through holes 4, 5, are made at an angle of 20 ° and connected with the bore 14 with a radius of 10 mm. In the through holes 4, 5 of the housing 1, gaskets 19 of elastic material are placed, then the saddles 9, 10 are installed. Then, using the rolling method, the saddles 9 and 10 are fixed in the landing holes of the housing 1. Connect the main flanges 2 to the housing 1 by welding 3, combining the central axis of the through holes 4 and 5 with the axes of the openings of the main flanges 2 and 3. Then they place the rod 7 in the central vertical hole 6 of the housing 1 with the end on which the wedge 8 is installed, before contacting the seats 9 and 10. At the second end stock 7 place covers at 12 and fix it to the housing 1. Install the yoke 13 in the cover 1, including the stuffing box seal and the pressure sleeve. A welding sleeve 16 is placed on the rod 7, the latter is fixed by means of a fixing sleeve 17 with a cover 12. By means of the installation sleeve 18, the rod 7 is indirectly connected to the control element, which is designed as a flywheel.

If necessary, mating flanges 21 and 22 are connected to the main flanges 2 and 3, respectively, using oval gaskets 20, which are located in the corresponding grooves made at the ends of the main and mating flanges. The gate flanges 21 and 22 and additional fasteners are equipped with a gate valve upon request. The counter flanges 21 and 22 are used to connect the valve to the main pipeline.

In terms of connections of structural elements, connecting pairs in the form of a stud-nut or in the form of a bolt-nut are used. The use of welding when connecting the main flanges 2, 3 to the housing 1, as well as the connection of the welding stand 16 with the mounting sleeve 17 and the mounting sleeve 18, avoids the machining of the joints, which also reduces the cost of the valve as a whole and reduces the complexity of its assembly. In addition, the above connection of the welding stand 16 with the mounting sleeve 17 and the mounting sleeve 18 can improve the reliability of the valve during operation and prevent jamming of the rod 7 with a wedge 8 installed at its end.

The integrated valve is ready for use for pumping: water, liquid and gaseous oil products, gas-oil mixtures, oil, associated and natural gas. The valve has a diameter of DN 50 and is used in performance with strength classes of working pressure: PN (Ru) 250, 160, and 100 kgf / cm ² .

The proposed valve expands the arsenal of pipe fittings used at high pressure.

In addition, it allows to reduce the cost of construction while maintaining its reliability, strength and efficiency during use.

The proposed valve increases the efficiency of the working body, preventing the possibility of jamming.

Claims (2)

1. The valve of high pressure pipe fittings, comprising a housing connected by a weld to the main flanges, the housing is equipped with coaxially arranged passage openings and a central vertical hole in which one of the ends of the rod is located, with a wedge fixed to it having contact with saddles , an actuator including a cover connected to the housing and the yoke assembly located therein, and a control element, characterized in that in the passage openings of the housing, with both sides from the central hole, a series of bores of various diameters is made, one of them is tapered, by means of which the seats are rolled, the cover is made separately with a welding stand made of metal, at one end of which a fixing sleeve equipped with through holes is welded, one of which is equipped with a thread, and at the second end, a mounting sleeve is welded, equipped with a through central hole and mounting holes, while the holes are threaded, in addition, with the welding sleeve is connected to the control body. 2. The valve according to claim 1, characterized in that the response flanges are fixed to the main flanges by means of annular gaskets.

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