Three-piece fixed ball valve for ultra-high pressure working condition

Abstract

The present invention provides a three-piece fixed ball valve for an ultra-high pressure working condition, comprising a valve body, a valve cover, a ball body, a valve stem, and a valve seat retainer. A support plate is provided on an upper end surface of the ball body; four annular slots are machined on an outer circumferential surface of the valve seat retainer abutting against an inner hole of the valve cover; an O-shaped ring is built in a slot I; a grease injection hole is machined on an outer circumferential surface of a slot II; an O-shaped ring and a retaining ring are built in a slot III; a fire-resistant graphite packing is built in a slot V; a sealed pipe threaded hole for mounting a damping valve and a grease injection valve is formed on an outer circumferential surface of a flange in the valve cover; a sealing sleeve is provided on an upper end surface of the valve body; a threaded hole for mounting the grease injection valve is provided in front of a large cylindrical surface of the sealing sleeve; and a grease injection through hole is machined at the bottom of the threaded hole. Support plates arranged above and below the ball body can absorb the acting force of a medium on the ball body, thereby reducing an opening / closing torque of the valve. The design of the valve grease injection hole can prolong the service life of the valve.

Description

An ultra-high pressure three-section fixed ball valve TECHNICAL FIELD

[0001] The present application relates to the technical field of ball valves, in particular to an ultra-high pressure three-section fixed ball valve. BACKGROUND

[0002] Ball valves are divided into upper-mounted integrated ball valves and side-mounted split ball valves according to the structure of the valve body. Due to the structural limitations of the ball valve itself, the assembly of the internal components (such as the ball, the sealing ring, the valve seat, etc.) of the upper-mounted ball valve needs to be made with special tooling, and the assembly method is relatively cumbersome; and the forming method of the integrated valve body is mostly casting forming, so it is generally only used for low pressure working conditions. The overall performance of the side-mounted ball valve currently applied to ultra-high pressure working conditions is unstable, such as low safety and poor sealing. TECHNICAL PROBLEM

[0003] In view of the deficiencies of the prior art, the present application provides an ultra-high pressure three-section fixed ball valve. SOLUTION

[0004] An ultra-high pressure three-section fixed ball valve, comprising a valve body, a valve cover, a ball, a valve stem, and a valve seat fixator, the valve seat fixator is provided with an annular groove for mounting a sealing ring, the outer circle of the sealing ring is provided with evenly distributed semicircular exhaust holes, the upper end face of the ball is provided with a support plate, the center positions of the left and right end faces of the support plate are provided with blind holes for mounting positioning pins, the front and back of the support plate are provided with inclined surfaces, the outer circular surface of the valve seat fixator abutting against the inner hole of the valve cover is processed with four annular grooves, groove I is provided with an O-ring, the outer circular surface of groove II is processed with a grease injection hole, groove III is provided with an O-ring and a check ring, groove V is provided with a fireproof graphite packing, the outer circular surface of the flange in the valve cover is provided with sealing tube threaded holes for mounting a damping valve and a grease injection valve, the front section of the threaded hole is processed with a through hole equal in size to the grease injection hole on the valve seat fixator, the upper end face of the valve body is provided with a sealing sleeve, the large circular surface of the sealing sleeve is provided with a screw hole for mounting a grease injection valve in front, and the bottom of the screw hole is processed with a grease injection through hole.

[0005] Preferably, a circular truncated cone is processed on the upper and lower ends of the ball, the outer circular surface of the circular truncated cone abuts against the center inner hole of the support plate through a sliding bearing, and the annular flat surfaces at the lower ends of the circular truncated cones are respectively provided with thrust bearings.

[0006] Preferably, a rectangular recess and a process threaded hole are processed on the upper end circular truncated plane of the ball and abut against the bottom of the valve stem.

[0007] Preferably, evenly distributed pin holes are processed on the upper end plane of the ball, and evenly distributed threaded connection holes are processed on the left and right side end faces. ADVANTAGEOUS EFFECTS

[0008] The support plates arranged above and below the ball can absorb the force from the medium to the ball, thereby reducing the opening and closing torque of the valve. If the medium leaks due to aging of the sealing element after the valve runs online for a period of time, the design of the grease injection hole can prolong the service life. The design of the fireproof graphite packing makes the internal leakage of the valve not exceed the provisions of API6FA and API607 in the case of fire. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a schematic diagram of the overall structure;

[0010] Fig. 2 is an enlarged view of part A in Fig. 1;

[0011] Fig. 3 is a schematic diagram of the support plate structure;

[0012] Fig. 4 is a schematic diagram of the partial structure of the valve seat;

[0013] Fig. 5 is a schematic diagram of the sealing sleeve structure;

[0014] Fig. 6 is a schematic diagram of the ball structure

[0015] Fig. 7 is a schematic diagram of the valve body structure.

[0016] Fig. 1-Valve body; 2-Valve cover; 3-Ball; 301-Circular table; 302-Rectangular groove; 303-Process thread hole; 4-Valve stem; 5-Valve seat holder; 501-Slot I; 502-Slot II; 503-Slot III; 504-Slot V; 505-Slot V; 6-Sealing ring; 7-Support plate; 701-Blind hole; 702-Inclined surface; 8-Fireproof graphite packing; 9-Check ring; 10-0-shaped ring; 11-Sealing tube threaded hole; 12-Sealing sleeve; 1201-Screw hole; 1202-Grease injection through hole. Best mode of the present application

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0018] Please refer to Figs. 1-7, a kind of superhigh pressure three-section fixed ball valve, including valve body, valve cover, ball, valve stem, valve seat holder, valve seat holder is provided with the annular groove of installation sealing ring, sealing ring outer circle is provided with the evenly distributed semicircle exhaust hole, it is convenient to press into the annular groove of valve seat holder by sealing ring.

[0019] The upper and lower of the sphere are symmetrically processed into conical frustums, the outer circle surface of the conical frustums abuts against the center inner hole of the support plate through sliding bearing, the annular plane of the upper and lower root of the conical frustums is respectively provided with a thrust bearing at the lower end plane of the support plate.

[0020] The upper end surface of the sphere is provided with a support plate, the center position of the left and right end surface of the support plate is provided with a blind hole for installing a positioning pin, the front and back of the support plate is provided with an inclined surface, the outer circle surface of the valve seat fixer abutting against the inner hole of the valve cover is processed into four annular grooves, the groove I is provided with an O-shaped ring, the outer circle surface of the groove II is processed into a grease injection hole, the groove III is provided with an O-shaped ring and a check ring, the groove V is provided with a fireproof graphite packing, the outer circle surface of the flange of the valve cover is provided with a sealing pipe threaded hole for installing a damping valve and a grease injection valve, the front section of the threaded hole is processed into a through hole with the same size as the grease injection hole of the valve seat fixer.

[0021] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions.

Claims

1. A three-section fixed ball valve with ultra-high pressure, comprising a valve body, a valve cover, a ball, a valve stem, and a valve seat retainer, wherein the valve seat retainer is provided with an annular groove for installing a sealing ring, characterized in that, The outer circumference of the sealing ring is provided with evenly distributed semi-circular vent holes. The upper end face of the sphere is provided with a support plate. The center of the left and right end faces of the support plate is provided with blind holes for installing positioning pins. The front and rear of the support plate are provided with inclined surfaces. The outer circumference of the valve seat retainer that abuts against the inner hole of the valve cover is machined with four annular grooves. Groove I is equipped with an O-ring. Groove II is machined with a grease injection hole on its outer circumference. Groove III is equipped with an O-ring and a retaining ring. Groove V is equipped with a fireproof graphite packing. The outer circumference of the flange in the valve cover is provided with a sealing pipe thread hole for installing a damping valve and a grease injection valve. The front section of the thread hole is machined with a through hole of the same size as the grease injection hole on the valve seat retainer. The upper end face of the valve body is provided with a sealing sleeve. The front of the large cylindrical surface of the sealing sleeve is provided with a threaded hole for installing a grease injection valve. The bottom of the threaded hole is machined with a grease injection through hole.

2. The ultra-high pressure three-section fixed ball valve according to claim 1, characterized in that, The sphere is machined into symmetrical frustums on its upper and lower sides. The outer surface of the frustum abuts against the inner hole of the support plate through a sliding bearing. Thrust bearings are respectively provided at the annular planes at the upper and lower roots of the frustum and at the lower end plane of the support plate.

3. The ultra-high pressure three-section fixed ball valve according to claim 2, characterized in that, The upper frustum of the sphere is machined with a rectangular groove and a process thread hole that abut against the bottom of the valve stem.

4. The ultra-high pressure three-section fixed ball valve according to claim 1, characterized in that, The valve body has evenly distributed pin holes machined on its upper surface and evenly distributed threaded connection holes machined on its left and right side surfaces.

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