An ultra-high pressure fixed orifice valve with replaceable core

Abstract

The utility model relates to a kind of ultra-high pressure fixed throttling valve with replaceable core, and it is equipped with special dismounting wrench;The main body of its valve body is four prism, and a stud head is processed on its upper end, and a cross-shaped four-way valve cavity is processed in its interior;Valve cover with elastic sealing ring, nut, shaft retaining ring and pressure relief valve are sequentially mounted in the upper of valve body and valve cavity hole;Valve core pressure cover with elastic sealing ring and throttling valve core and anti-wear sleeve made of hard alloy material are mounted in the lower valve cavity hole of valve body;The left side of valve body and valve cavity hole are inlet channel, and the right side of valve body and valve cavity hole are backflow hole, and a blind plate flange inlaid with hard alloy module is fixed at backflow hole mouth with sealing gasket ring and stud nut.Due to the adoption of four prism valve body, backflow hole and anti-wear sleeve are arranged in the valve body, pressure relief valve is arranged on valve cover, throttling valve core is convenient to dismount and has multiple aperture for selection, so that it has the advantages of simple structure, pressure and wear resistance, reliable performance, accurate measurement, easy maintenance and the like.

Description

Technical Field

[0001] This utility model relates to a "fixed throttle valve" used in industries such as petrochemical equipment. Background Technology

[0002] Fixed throttle valves are frequently seen in petrochemical equipment. These valves are characterized by their simple structure, stable flow rate, ease of maintenance, and low cost, and are often used in pipelines or equipment where frequent flow adjustments are not required. In recent years, as the focus of oil and gas drilling and production in my country has shifted to the western plateau regions, oil and gas wells are being drilled deeper and operating at increasingly higher pressures. Existing fixed throttle valves suffer from problems under the impact of ultra-high pressure sand-containing media (100MPa–210MPa), such as abnormal valve body breakdown, rapid wear of the valve core, easy damage to seals, and difficulty in supporting and fixing the heavy valves. Therefore, it is necessary to upgrade the technology of fixed throttle valves to adapt them to ultra-high pressure conditions. Summary of the Invention

[0003] The purpose of this utility model is to provide a fixed throttle valve product that is suitable for ultra-high pressure conditions, technologically advanced, and durable.

[0004] This utility model is composed of a valve body, valve cover, union nut, shaft retaining ring, pressure relief valve, elastic sealing ring, hard alloy module, blind flange, sealing gasket, stud nut, valve core cover, throttle valve core, and anti-wear sleeve, and is equipped with a special disassembly and assembly wrench. Its features are: the main body of the valve body is a quadrangular prism, with a stud head machined at the upper end of the quadrangular prism, and a cross-shaped four-way valve cavity machined inside the valve body; the valve cover with elastic sealing ring, union nut, shaft retaining ring, and pressure relief valve are sequentially installed on the upper part of the valve body and in the valve cavity hole; the valve core cover with elastic sealing ring, throttle valve core made of hard alloy material, and anti-wear sleeve are installed in the valve cavity hole at the lower part of the valve body; the left side of the valve body and the valve cavity hole are the inlet channel, and the right side of the valve body and the valve cavity hole are the reflux hole; a blind flange with a hard alloy module is fixed at the reflux hole opening with a sealing gasket and stud nut.

[0005] Furthermore, the special disassembly and assembly wrench of this utility model consists of an internal hex wrench, a round steel handle, and a plastic top cover.

[0006] Because the valve body of this invention is a quadrangular prism, it is more conducive to the support and fixation of ultra-high pressure, large-diameter, and large valves. A reflux hole is machined on the right side of the valve body. A blind flange with a hard alloy module is fixed at the reflux hole opening using a sealing gasket and stud nut. This effectively resists the impact and wear of ultra-high pressure sand-containing media, thus preventing valve body breakdown. A valve core gland with an elastic sealing ring and a throttling valve core made of hard alloy material, along with an anti-wear sleeve, are installed in the valve cavity at the bottom of the valve body, giving this invention superior wear resistance and a long service life. Placing the pressure relief valve above the valve cover and union nut effectively prevents collisions with external objects and provides a convenient reminder to operators to depressurize before opening the cover when replacing the valve core, preventing pressure burst accidents. Furthermore, the use of union nut connections and a special disassembly wrench allows for convenient and quick replacement of worn or different diameter throttling valve cores, resulting in better performance. Attached Figure Description

[0007] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0008] Figure 2 This is a top view of the overall structure of this utility model;

[0009] Figure 3 This utility model Figure 1 Enlarged cross-sectional diagram of the medium elastic sealing ring;

[0010] Figure 4 This utility model Figure 1 Enlarged schematic diagram of the valve core gland from direction A;

[0011] Figure 5 This is a schematic diagram of the overall structure of the disassembly and assembly wrench of this utility model, showing a partial cross-sectional view and an overlapping cross-section.

[0012] The component names shown in the diagram are as follows:

[0013] 1. Valve body, 2. Valve cover, 3. Union nut, 4. Shaft retaining ring, 5. Pressure relief valve, 6. Elastic sealing ring, 7. Hard alloy module, 8. Blind flange, 9. Sealing gasket ring, 10. Stud nut, 11. Valve core gland, 12. Throttling valve core, 13. Anti-wear sleeve, 14. Removal wrench. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0015] Figure 1 , Figure 2In this invention, the valve body 1, valve cover 2, union nut 3, shaft retaining ring 4, pressure relief valve 5, elastic sealing ring 6, hard alloy module 7, blind flange 8, sealing gasket ring 9, stud nut 10, valve core cover 11, throttle valve core 12, and anti-wear sleeve 13 are combined, and a special disassembly and assembly wrench 14 is provided. The main body of the valve body 1 is a quadrangular prism, with a stud head machined at the upper end of the quadrangular prism. Inside the valve body 1, there is a cross-shaped four-way valve cavity. The cross-shaped four-way valve cavity has a large cylindrical hole in the center, a cylindrical through hole of the same diameter on the left, an outer cylindrical and inner conical through hole on the right, a cylindrical through hole with a flared mouth at the top, and a stepped through hole composed of a larger cylindrical hole, a slightly smaller threaded hole, a relief groove, and a reduced cylindrical hole at the bottom. A valve cover 2 with an elastic sealing ring 6, a union nut 3, a shaft retaining ring 4, and a pressure relief valve 5 are sequentially installed on the upper part of the valve body 1 and in the valve cavity. A valve core cover 11 with an elastic sealing ring 6, a throttling valve core 12 made of hard alloy material, and an anti-wear sleeve 13 are installed in the valve cavity at the lower part of the valve body 1. The left side of the valve body 1 and the valve cavity are the inlet channels, which are connected to the outside by a sealing gasket 9 and a stud nut 10. The right side of the valve body 1 and the valve cavity are the return holes. A blind flange 8 with a hard alloy module 7 is fixed at the return hole opening by a sealing gasket 9 and a stud nut 10. When the ultra-high pressure sand-containing medium rushes into the valve cavity from the left inlet channel of the valve body 1, it rushes towards the right return hole due to inertia. After encountering resistance, it flows back and flows out from the central hole of the lower valve core cover 11, the throttling valve core 12, and the anti-wear sleeve 13. The reduced fixed-size central hole of the throttling valve core 12 plays a throttling role.

[0016] Valve cover 2 is a rotating part. The upper end consists of two cylinders of different diameters, one small and one large. A groove for mounting a retaining ring 4 is cut into the upper edge of the smaller diameter cylinder. The lower end is a smooth cylinder with a reduced diameter, and two grooves for mounting elastic sealing rings 6 are cut at intervals along its circumference. The middle section is a cone connecting the larger diameter cylinder at the upper end and the smooth cylinder with a reduced diameter at the lower end. At the center of valve cover 2, there is a very small diameter cylindrical hole at the top and a larger diameter cylindrical hole at the bottom, with a transitional conical hole at the junction of the two holes. A stepped hole with a tapered pipe thread is machined at the upper opening of the smaller diameter cylindrical hole at the top for mounting a pressure relief valve 5.

[0017] The union nut 3 is a nut part in the union joint assembly manufactured according to international standards. Its outer surface is a cylinder with three evenly distributed flanges on the top of the cylinder to facilitate hammering for disassembly and assembly. Its inner center has a stepped through hole consisting of a smaller diameter cylindrical hole, a larger diameter relief groove, and a slightly smaller diameter threaded hole, which is used to connect the valve body 1 and the pressure valve cover 2.

[0018] The shaft retaining ring 4 is a standard part manufactured according to national standards. It is an open elastic steel ring with a rectangular radial cross-section, used to prevent axial movement of parts. The pressure relief valve 5 is a small valve component commonly used in oil drilling and production equipment, which serves to seal or release container pressure.

[0019] Figure 1 , Figure 3 In the middle, the elastic sealing ring 6 used for the valve cover 2 and the valve core gland 11 has parallel straight sides on the radial section, an arc-shaped groove on the inner side and an arc-shaped protrusion on the outer side. The material is "FKM fluororubber" or "HNBR high-saturation hydrogenated nitrile rubber". At the two shoulders of the arc-shaped protrusion, a spring ring made of stainless steel wire is inlaid to effectively prevent leakage of ultra-high pressure fluid medium.

[0020] The hard alloy module 7 consists of two flat cylinders of different diameters. The larger diameter end is inserted into the central blind hole of the blind flange 8, and the smaller diameter end is inserted into the reflux hole on the right side of the valve body 1 to resist the impact of ultra-high pressure sand-containing media.

[0021] The blind flange 8, sealing gasket 9, and stud nut 10 are all general and standard parts in oil drilling and production equipment. They are installed at the reflux hole on the right side of the valve body 1, carrying the hard alloy module 7. Under the compression of the evenly distributed stud nuts 10, the steel sealing gasket 9 in the corresponding gasket groove of the valve body 1 and the blind flange 8 can ensure the sealing of ultra-high pressure fluid media above 100MPa.

[0022] Figure 1 , Figure 4 In the valve core cover 11, a hollow cylindrical part is made of medium carbon alloy steel and quenched. The upper part of the outer periphery is the thickest cylinder, on which two grooves for installing elastic sealing rings 6 are cut at intervals. The lower part of the outer periphery is a slightly smaller diameter stud, and a relief groove is cut at the junction of the cylinder and the stud. The center of the valve core 11 has a stepped through hole from top to bottom, consisting of a large-diameter internal hexagonal hole, a reduced-diameter cylindrical hole, and a larger-diameter cylindrical hole. The upper internal hexagonal hole is used for disassembly and assembly, the middle cylindrical hole is used for flow guidance, and the lower cylindrical hole is used to install the throttle valve core 12. When the valve core cover 11 and the two elastic sealing rings 6 are screwed into the threaded holes in the valve cavity of the valve body 1 using the disassembly and assembly wrench 14, the throttle valve core 12 is pressed into the larger-diameter cylindrical hole below the valve core cover 11.

[0023] The throttle valve core 12 is a flat, hollow cylindrical part made of tungsten-cobalt hard alloy YG8 material. Its outer periphery is a smooth cylinder, and its center is a cylindrical through hole that serves as the throttle valve's throttling channel. The cylindrical through hole can be machined into various different throttling orifice diameters for customers to choose from, or it can be sent as an accessory.

[0024] The wear-resistant sleeve 13 is a hollow cylindrical part with a smooth outer surface and a smooth cylindrical through hole in the center. It is made of tungsten cobalt hard alloy YG8 material and is installed at the outlet below the valve body 1 to withstand the impact and wear of high-speed sand-containing media after throttling. For throttling valves with a diameter ≥65mm, the wear-resistant sleeve 13 can be integrated by welding hard alloy material at the outlet of the valve body 1.

[0025] Figure 5 In this invention, the disassembly and assembly wrench 14 is a crucial component. The disassembly and assembly wrench 14 consists of an internal hexagonal wrench, a round steel handle, and a plastic cap. The lower end of the internal hexagonal wrench has a hexagonal head that mates with the internal hexagonal hole of the valve core cover 11. The remaining part is a steel tube welded to the hexagonal head and with a radial through hole drilled at its upper end. The upper end of the internal hexagonal wrench is sealed with a plastic cap, and a round steel handle is inserted through the radial through hole of the steel tube for disassembling and assembling the valve core cover 11 and the throttle valve core 12 in the valve body 1. The round steel handle used in the disassembly and assembly wrench 14 has a recessed notch on one side, used to insert into the center hole of the valve core cover 11 and the throttle valve core 12, hooking its lower edge to remove it from the valve body 1. The round steel handle can be placed inside the steel tube of the internal hexagonal wrench and sealed with the plastic cap for easy carrying and storage.

Claims

1. A fixed throttle valve with a replaceable core under ultra-high pressure, which is composed of a valve body, a valve cover, a union nut, a shaft retaining ring, a pressure relief valve, an elastic sealing ring, a cemented carbide module, a blind flange, a gasket ring, stud nuts, a valve core gland, a throttle valve core and an anti-wear sleeve, and is equipped with a special disassembly and assembly wrench. Its characteristics are as follows: The main body of the valve body is a quadrangular prism. A screw head is machined at the upper end of the quadrangular prism, and a cross-shaped four-way valve cavity is machined inside the valve body; above the valve body and in the valve cavity hole, a valve cover with an elastic sealing ring, a union nut, a shaft retaining ring and a pressure relief valve are successively installed. In the valve cavity hole at the lower part of the valve body, a valve core gland with an elastic sealing ring, a throttle valve core made of hard alloy material and an anti-wear sleeve are installed. The left side of the valve body and the valve cavity hole are the inlet channels, and the right side of the valve body and the valve cavity hole are the return holes. At the return hole opening, a blind flange with a hard alloy module inserted is fixed with a gasket ring and stud nuts.

2. The fixed throttle valve with a replaceable core under ultra-high pressure according to claim 1, wherein: The cross-shaped four-way valve cavity inside the valve body has a chamber with a large cylindrical hole in the center, a cylindrical through hole with the same diameter on the left side, an outer cylindrical and inner conical through hole on the right side, a cylindrical through hole with a flared mouth on the upper side, and a stepped through hole composed of a larger cylindrical hole, a slightly smaller threaded hole, a relief groove and a reduced cylindrical hole on the lower side.

3. The fixed throttle valve with a replaceable core under ultra-high pressure according to claim 1, characterized in that: The elastic sealing rings used for the valve cover and the valve core gland have parallel straight edges at the upper and lower parts of their radial cross-sections. There is an arc-shaped groove on the inner side and an arc-shaped protrusion on the outer side. The material is "FKM fluororubber" or "HNBR highly saturated hydrogenated nitrile rubber"; at the two shoulders of the arc-shaped protrusion end, a spring ring made of stainless steel wire is inserted on each.

4. The fixed throttle valve with a replaceable core under ultra-high pressure according to claim 1, characterized in that: The valve core gland is a hollow cylindrical part, quenched with medium carbon alloy steel material. The upper part of its periphery is the thickest cylinder, and two grooves for installing elastic sealing rings are cut at intervals on the cylinder. The lower part of its periphery is a slightly smaller stud cylinder, and a relief groove is cut at the junction of the cylinder and the stud cylinder; in the center of the valve core, from top to bottom, there is a stepped through hole composed of a section of inner hexagonal hole with a large diameter, a section of cylindrical hole with a reduced diameter and a section of cylindrical hole with a larger diameter.

5. The fixed throttle valve with a replaceable core under ultra-high pressure according to claim 1, characterized in that: The throttle valve core is a flat hollow cylindrical part, made of tungsten carbide cobalt hard alloy YG8 material. Its periphery is a smooth cylinder, and its center is a cylindrical through hole serving as the throttle channel of the throttle valve. The cylindrical through hole can be machined into various different throttle hole diameters.

6. The fixed throttle valve with a replaceable core under ultra-high pressure according to claim 1, wherein: The anti-wear sleeve is a hollow cylindrical part, with a smooth cylinder on the outside and a smooth cylindrical through hole in the center, made of tungsten carbide cobalt hard alloy YG8 material; for throttle valves with a nominal diameter ≥ 65mm, the anti-wear sleeve can be integrated by surfacing hard alloy material at the outlet of the valve body.

7. The fixed throttle valve with a replaceable core under ultra-high pressure according to claim 1, characterized in that: The disassembly and assembly wrench consists of an inner hexagonal wrench, a round steel handle and a plastic top cover. The lower end of the inner hexagonal wrench is a hexagonal head that fits the inner hexagonal hole of the valve core gland, and the rest is a steel pipe welded to the hexagonal head and drilled with a radial through hole at the upper end; the upper end of the inner hexagonal wrench is sealed with a plastic top cover, and a round steel handle is inserted into the radial through hole of the steel pipe.

8. The fixed throttle valve with ultra-high pressure and replaceable core according to claim 7, characterized in that: The round steel handle used for the disassembly and assembly wrench has a recessed notch machined on one side of one end; the round steel handle can be placed inside the steel pipe of the inner hexagonal wrench and sealed with a plastic top cover.

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