CN110657258A - Improved method and structure of plug valve - Google Patents

Improved method and structure of plug valve Download PDF

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Publication number
CN110657258A
CN110657258A CN201911011632.7A CN201911011632A CN110657258A CN 110657258 A CN110657258 A CN 110657258A CN 201911011632 A CN201911011632 A CN 201911011632A CN 110657258 A CN110657258 A CN 110657258A
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CN
China
Prior art keywords
key
hole
valve body
groove
ball
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911011632.7A
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Chinese (zh)
Inventor
黄瑞海
金锋
万文财
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou Gaofeng Petroleum Machinery Co Ltd
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Guizhou Gaofeng Petroleum Machinery Co Ltd
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Filing date
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Application filed by Guizhou Gaofeng Petroleum Machinery Co Ltd filed Critical Guizhou Gaofeng Petroleum Machinery Co Ltd
Publication of CN110657258A publication Critical patent/CN110657258A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0605—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor with particular plug arrangements, e.g. particular shape or built-in means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/06—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing
    • F16K41/063—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles
    • F16K41/066—Spindle sealings with stuffing-box ; Sealing rings with at least one ring attached to both spindle and housing for spindles which only rotate, i.e. non-rising spindles for rotating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0647—Spindles or actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0689—Packings between housing and plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0663—Packings
    • F16K5/0694—Spindle sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
    • F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
    • F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/08—Details
    • F16K5/22—Features relating to lubrication
    • F16K5/227—Features relating to lubrication for plugs with spherical surfaces

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)

Abstract

The invention discloses an improved method and a structure of a plug valve, wherein a limiting boss is arranged at an orifice of an operation hole of a valve body, an arc-shaped limiting groove is arranged on an operation key, the operation key can only rotate within a range of 90 degrees through the rotation matching of the limiting boss and the arc-shaped limiting groove, and a linear convex key is arranged on the operation key and connected with a key groove on a ball core to jointly realize the opening and closing functions of the plug valve; the bottom of the operating key is provided with a limiting ring to prevent the operating key from being ejected out of the operating hole by water pressure in the water flow channel; the bottom of the operating key is connected with the key groove on the valve core through the linear convex key, so that the structure of the plug valve is simplified, and the reliability of the plug valve is improved. The operating key of the plug valve is of an integral structure, has a simple structure and fewer parts, reduces the processing difficulty, improves the strength of the valve body, effectively solves the problem of stress concentration of the plug valve caused by the underground severe working condition, and can avoid the risk of fracture of the plug valve underground. The cost performance of the product is improved.

Description

Improved method and structure of plug valve
Technical Field
The invention relates to an improved method and a structure of a plug valve, and belongs to the technical field of ball valve structures.
Background
The plug valve is used as an internal blowout prevention ball valve of a drilling tool, is widely applied to drilling and well repairing construction operation at home and abroad, and is used for isolating or communicating liquid in a water flow channel of a drill string. The drilling fluid of the plug valve is opened to enter the drill string in the normal drilling process, and the plug valve is closed when a single joint is connected, so that the drilling fluid can be prevented from splashing on a well platform, the waste of the drilling fluid is avoided, and the environment-friendly requirement is met; when taking place the well kick in the pit, in time close the plug valve when accidents such as blowout can prevent that combustible gas or liquid from spilling over the well head, cause casualties and loss of property, but the plug valve commonly used on the existing market receives structural constraint, often can bring new potential safety hazard, the stress concentration rupture condition of groove production in the valve body hole of plug valve now, the manipulating key is integrated configuration, upper and lower ball seat structure is non-uniform, the part is many, the structure is complicated, the dismouting is inconvenient, it is consuming time hard, the pressure testing is unstable. Therefore, the prior art has shortcomings and needs to be further improved.
Disclosure of Invention
The invention aims to provide an improved method and a structure of a plug valve, which can reduce the number of parts to the maximum extent, reduce the consumption of part materials to the maximum extent, reduce the processing difficulty to the maximum extent on the premise of improving the strength safety of the plug valve, and realize the pressure on-off and pressure on-off under certain pressure, thereby improving the reliability and safety of the plug valve and overcoming the defects existing in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to an improvement method of a plug valve, which is characterized in that a limiting boss is arranged at an orifice of an operation hole of a valve body, an arc-shaped limiting groove is arranged on an operation key, the operation key can only rotate within a range of 90 degrees through the rotation matching of the limiting boss and the arc-shaped limiting groove on the operation key, and the bottom of the operation key is connected with a key groove on a valve core through a linear convex key to jointly realize the opening and closing functions of the plug valve; in addition, the bottom of the operating key is provided with a limiting ring to prevent the operating key from being ejected out of the operating hole by water pressure in the water flow channel; the bottom of the operating key is connected with the key groove on the valve core through a straight convex key, so that the purposes of simplifying the structure of the plug valve and improving the reliability of the plug valve are achieved.
In the improved method, the upper ball seat and the lower ball seat at the upper end and the lower end of the valve core are designed into standard ball seats with the same structure, so that the processing procedure is simplified and the upper ball seat and the lower ball seat can be used interchangeably; the small hole is additionally arranged in the center of the key groove of the valve core, so that the rapid exhaust during the pressing test is facilitated, and the pressing efficiency is improved.
In the improved method, the sealing ring groove is arranged on the corresponding hole of the valve body, the O-shaped ring with a double-retainer structure is arranged, the structure of the operating key is simpler, the corresponding sealing ring is a smooth cylindrical surface, the diameter of the cylinder can be minimized when the sizes of the inner square or inner hexagonal knob holes are the same, namely, the strength of the operating key is the best, and meanwhile, the hole formed in the valve body can also be minimized, so that the strength of the valve body is improved, and the reliability of the valve body is effectively ensured. Naturally, the structure can also be easily modified, the operating hole and the sealing ring groove arranged on the operating hole at the operating key are designed and placed on the operating key, and the corresponding valve body hole is a smooth inner hole, which is also the structure modification at the operating key.
In the improved method, the standby cap positioned at the top of the standard ball seat is connected with the valve body through threads, so that the compression adjustment and positioning of the standard ball seat and the valve core are realized; to simplify the structure of the plug valve.
The improved structure of the plug valve comprises a valve body, wherein one side of the valve body is provided with an operating key; the operating key is matched and connected with the ball core in the valve body; ball seats are respectively arranged at the upper end and the lower end of the ball core; a spare cap is arranged at the top of the ball seat above the ball core; springs are arranged between the spare cap and the ball seat and between the ball seat and the valve body; the top of the equipment cap is provided with an elastic retainer ring for holes.
In the improved structure of the plug valve, the valve body is of a tubular structure; the valve body is provided with a ball seat limiting ring, an internal thread for installing a spare cap and a retainer ring groove for installing an elastic retainer ring for a hole; an operation hole is formed in one side of the valve body, a limiting boss is arranged at the orifice of the operation hole, and an operation hole sealing groove used for mounting a sealing ring of a double-check ring structure is formed in the lower portion of the operation hole.
In the improved structure of the plug valve, the operating key is of a cylindrical structure; a knob hole is formed in the center of the top end of the operating key, the opening of the knob hole of the operating key is square or hexagonal, and a threaded blind hole is formed in the bottom of the knob hole of the operating key; the edge of the top end of the operating key is provided with an arc-shaped limiting groove, the arc-shaped limiting groove on the operating key is in rotary fit with a limiting boss at an operating hole at one side of the valve body, so that the operating key can only rotate within a range of 90 degrees, and meanwhile, the bottom of the operating key is connected with a key groove on the valve core through a linear convex key to jointly realize the opening and closing functions of the plug valve structure; the number of the limiting bosses and the number of the arc-shaped limiting grooves of the operating key are 1-3; the bottom end of the operating key is provided with a linear convex key, and a cylindrical excircle above the linear convex key of the operating key is provided with a limiting ring; the top surface of the limit ring is provided with an oil groove, and the oil groove on the top surface of the limit ring is provided with a soft metal sealing gasket.
In the improved structure of the plug valve, the ball core is provided with a smooth through hole, and the central axis of the smooth through hole is superposed with the central axis of the valve body; an operation plane parallel to the central axis of the smooth through hole is arranged on the ball core, and a key groove perpendicular to the central axis of the smooth through hole is arranged on the operation plane; the key groove is matched and connected with a linear convex key at the bottom end of the operation key; the center of the key groove is provided with a small hole.
In the improved structure of the plug valve, the ball seat structures at the upper end and the lower end of the ball core are the same and are both convex circular tube structures; the matching surface of the large-end pipe orifice of the ball seat and the ball body of the ball core is a concave spherical surface, the outer diameter of the small-end pipe end of the ball seat is provided with a ball seat sealing groove, a sealing ring with a double-retainer structure is arranged in the ball seat sealing groove, and the large-end surface of the ball seat is a full flat surface, so that interference and shielding cannot occur when an operating key is disassembled; the bottom of the operation hole of the operation key is provided with a threaded blind hole, and the hole can be easily pulled in place by using a tool when the operation key is assembled, so that the assembling efficiency is improved.
In the improved structure of the plug valve, the spare cap is of a circular tube structure; the outer circle of the spare cap is provided with an external thread, and the external thread is matched and connected with the internal thread in the valve body; a group of screwing grooves for screwing the spare cap are arranged at the pipe orifice at the top of the spare cap; the spring is a corrugated spring or a group of uniformly distributed cylindrical springs.
In the improved structure of the plug valve, the water flow channel of the valve body, the water flow channel of the ball core and the ball seats at the upper end and the lower end of the ball core, and the water flow channel formed by the spare cap and the inner hole of the valve body are smooth drift diameters with the same diameter.
Due to the adoption of the technical scheme, compared with the prior art, the operating key of the plug valve is of an integral structure, and an upper splicing ring, a lower splicing ring, a supporting sleeve, a cross joint and an operating key sleeve in the existing structure are eliminated, so that the plug valve is fewer in parts and simpler in structure; the deep ring grooves for installing the upper splicing ring, the lower splicing ring and the operation key sleeve are not required to be processed in the valve body, so that the strength of the valve body is improved, the problem of stress concentration of the plug valve caused by the underground severe working condition is effectively solved, and the risk of fracture of the plug valve in the pit can be avoided. The upper ball seat and the lower ball seat in the prior plug valve have different structures and can not be interchanged. The invention unifies the upper and lower ball seat structure, the upper and lower ball seats can be completely exchanged, and the standardization of parts is realized; because the reduction of part quantity for ball core subassembly overall height shortens, does benefit to sealed setting and the sealed face's of valve body finish machining processing control, greatly reduced the processing degree of difficulty. Meanwhile, the sealing and the organization production and the batch production are facilitated. The small hole and the whole structure added on the ball core are beneficial to fast exhausting when the upper end, the lower end and the valve body of the plug valve are sealed and pressed for testing, the pressing time is saved, the efficiency is improved, and high-pressure and low-pressure sealing is easily realized. The oil storage tank is arranged on the operating key limiting ring instead of the end face of one side of the metal sealing gasket, so that the assembly is convenient, and the reverse assembly of the soft metal sealing gasket can be avoided. The lower ends of the valve body operation hole, the ball seat and the spare cap are respectively provided with a sealing structure of double retaining rings and O-shaped rings, so that the valve body operation hole, the ball seat and the spare cap are convenient to assemble, the reverse installation of the retaining rings can be avoided, and the valve body operation hole, the ball seat and the lower end of the spare cap have the performances of bidirectional high-pressure sealing and guiding support. The double-wave-spring structure is beneficial to sealing and pressurizing the upper end and the lower end of the plug valve, sealing is carried out at high pressure and low pressure, and the pressurizing qualification rate is improved. Can be according to the on-the-spot needs, only need to change the structure that a set of spring was easily realized to the valve body, for example can subtract one spring realization conventional structure on the ball seat excircle step at upper and lower both ends, reduce the production stock when being favorable to batch production equally. In addition, the water flow channel in the improved structure of the invention has no groove, namely the water flow channel consisting of the ball core, the water flow channel of the ball seats at the upper and lower ends of the ball core, the water flow channel consisting of the spare cap and the inner hole of the valve body are smooth and have the same diameter, and no groove exists, thus turbulence can not be caused, and the inner hole of a workpiece can not be eroded.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic structural view of a valve body;
FIG. 4 is a schematic view of the structure of the operation keys;
FIG. 5 is a schematic view of the valve cartridge;
FIG. 6 is a schematic view of a tee construction;
FIG. 7 is a schematic view of the structure of the cap;
FIG. 8 is a schematic diagram of a prior art configuration;
fig. 9 is a sectional view B-B of fig. 8.
The labels in the figures are: 1-valve body, 1.1-ball seat limit ring, 1.2-internal thread, 1.3-retainer ring groove, 1.4-operation hole, 1.5-limit boss, 1.6-seal groove, 2-operation key, 2.1-turn-knob hole, 2.2-arc limit groove, 2.3-I-shaped convex key, 2.4-oil groove, 2.5-limit ring, 2.6-soft metal seal gasket, 2.7-thread blind hole, 3-ball core, 3.1-smooth through hole, 3.2-operation plane, 3.3-key groove, 3.4-small hole, 4-ball seat, 4.1-concave spherical surface, 4.2-ball seat seal groove, 4.3-double retainer ring structure seal ring, 4.4-smooth internal hole, 4.5-full flat surface, 5-spare cap, 5.1-external thread, 5.2-turn-screw groove, 6-spring, 7-elastic retainer ring for hole, 8-operation key sleeve, 9-cross joint, 10-upper splicing ring, 11-lower splicing ring, 12-support sleeve, 13-upper ball seat and 14-lower ball seat.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention discloses an improvement method of a plug valve, which is characterized in that a limiting boss is arranged at an orifice of an operation hole of a valve body, an arc-shaped limiting groove is arranged on an operation key, the operation key can only rotate within a range of 90 degrees through the rotation matching of the limiting boss of the operation orifice on the valve body and the arc-shaped limiting groove on the operation key, and the bottom of the operation key is connected with a key groove on a valve core through a linear convex key to jointly realize the opening and closing functions of the plug valve structure, as shown in figures 1 and 2; the number of the limiting bosses at the operating hole on the valve body and the number of the limiting grooves of the operating keys are 1-3; in addition, the bottom of the operating key is provided with a limiting ring to prevent the operating key from being ejected out of the operating hole by water pressure in the water flow channel; the bottom of the operating key is connected with the key groove on the valve core through a straight convex key, so that the purposes of simplifying the structure of the plug valve and improving the reliability of the plug valve are achieved. The upper ball seat and the lower ball seat at the upper end and the lower end of the valve core are designed into standard ball seats with the same structure, so that the processing procedure is simplified and the upper ball seat and the lower ball seat can be used interchangeably; the small hole is additionally arranged in the center of the key groove of the valve core, so that the rapid exhaust during the pressing test is facilitated, and the pressing efficiency is improved. Connecting a standby cap positioned at the top of the standard ball seat with the valve body through threads to realize the adjustment and positioning of the standard ball seat and the valve core in a pressing manner; to simplify the structure of the plug valve.
The improved structure of the plug valve of the invention formed by the improved method comprises a valve body 1, wherein an operating key 2 is arranged on one side of the valve body 1, as shown in figures 1 and 2; the operating key 2 is matched and connected with the ball core 3 in the valve body 1; ball seats 4 are respectively arranged at the upper end and the lower end of the ball core 3; a spare cap 5 is arranged at the top of the ball seat 4 above the ball core 3; springs 6 are arranged between the spare cap 5 and the ball seat 4 and between the ball seat 4 and the valve body 1; the top of the spare cap 5 is provided with a circlip 7 for holes.
As shown in fig. 3: the valve body 1 is of a tubular structure; the valve body 1 is provided with a ball seat limiting ring 1.1, an internal thread 1.2 for installing a spare cap 5 and a retainer groove 1.3 for installing a circlip 7 for a hole; one side of the valve body 1 is provided with an operation hole 1.4, the orifice of the operation hole 1.4 is provided with a limit boss 1.5, and the lower part of the operation hole 1.4 is provided with an operation hole sealing groove 1.6 for installing a sealing ring with a double check ring structure.
As shown in fig. 4: the operating key 2 is of a cylindrical structure; a knob hole 2.1 is arranged in the center of the top end of the operating key 2, the opening of the knob hole 2.1 is an inner square or an inner hexagonal, and a threaded blind hole 2.7 is arranged at the bottom of the knob hole 2.1; the edge of the top end of the operating key 2 is provided with an arc-shaped limiting groove 2.2, and the arc-shaped limiting groove 2.2 is in rotating fit with a limiting boss 1.5 at the orifice of an operating hole 1.4 at one side of the valve body 1; the bottom end of the operating key 2 is provided with a linear convex key 2.3, and the cylindrical excircle above the linear convex key 2.3 is provided with a limiting ring 2.5; the top surface of the limiting ring 2.5 is provided with an oil groove 2.4, the oil groove 2.4 on the top surface of the limiting ring 2.5 is provided with a soft metal sealing gasket 2.6, a sealing ring structure between the operating key 2 and the valve body 1 is provided with a sealing ring groove 1.6 on a corresponding hole of the valve body, an O-shaped ring with a double-retainer structure is arranged, and the sealing part corresponding to the operating key 2 is a smooth cylindrical surface.
As shown in fig. 5: a smooth through hole 3.1 is arranged on the ball core 3, and the central axis of the smooth through hole 3.1 is superposed with the central axis of the valve body 1; an operation plane 3.2 parallel to the central axis of the smooth through hole 3.1 is arranged on the ball core 3, and a key groove 3.3 vertical to the central axis of the smooth through hole 3.1 is arranged on the operation plane 3.2; the key groove 3.3 is matched and connected with the linear convex key 2.3; the center of the key groove 3.3 is provided with a small hole 3.4.
As shown in fig. 6: the ball seats 4 at the upper and lower ends of the ball core 3 have the same structure and are all in a convex circular tube structure; the big-end mouth of pipe of ball seat 4 and the spheroid fitting surface of ball core 3 are interior concave spherical surface 4.1, are equipped with ball seat seal groove 4.2 on the little head pipe end external diameter of ball seat 4, are equipped with two retainer ring structure sealing washers 4.3 in the ball seat seal groove 4.2.
As shown in fig. 7: the spare cap 5 is a circular tube structure; the outer circle of the spare cap 5 is provided with an external thread 5.1, and the external thread 5.1 is matched and connected with an internal thread 1.1 in the valve body 1; a group of screwing grooves 5.2 for screwing the spare cap 5 are arranged at the pipe orifice at the top of the spare cap 5.
The spring 6 is a corrugated spring or a group of uniformly distributed cylindrical springs.
During manufacturing, the water flow channel of the valve body 1, the water flow channel of the ball core 3 and the ball seats 4 at the upper and lower ends thereof, and the water flow channel formed by the spare cap 5 and the inner hole of the valve body 1 are all manufactured into smooth drift diameters with the same diameter.
The drift diameter water flow channel formed by the valve body 1, the ball core 3, the ball seat 4 and the inner hole of the spare cap 5 is smooth and has no groove, thus no turbulent flow is caused and the inner hole of a workpiece is eroded. Therefore, the structure is safe and reliable, and the service life is prolonged.
The invention is further illustrated as follows:
the invention relates to an improvement of the existing plug valve, which comprises an operation key sleeve 8, a cross joint 9, an upper splicing ring 10, a lower splicing ring 11, a support sleeve 12, an upper ball seat 13, a lower ball seat 14 and other parts as shown in figures 8 and 9, wherein the number of the parts is large, and the valve body is also provided with corresponding mounting grooves with deep grooves due to more parts forming the existing plug valve. These deep grooves affect the strength of the valve body. Meanwhile, stress concentration is easily generated at the deep grooves, the existing plug valve has the risk of underground fracture, and the reliability is low. Improvements are therefore needed.
The improved structure of the plug valve can be used as a standardized reliable plug valve product, and as shown in fig. 1 and fig. 2, the improved structure comprises a valve body 1, wherein an operating key 2 is arranged on one side of the valve body 1; the operating key 2 is matched and connected with the ball core 3 in the valve body 1; ball seats 4 are respectively arranged at the upper end and the lower end of the ball core 3; a spare cap 5 is arranged at the top of the ball seat 4 above the ball core 3; springs 6 are arranged between the spare cap 5 and the ball seat 4 and between the ball seat 4 and the valve body 1; an elastic check ring 7 for holes is arranged between the top of the spare cap 5 and the valve body 1, and a check ring groove 1.3 of the elastic check ring 7 for holes is arranged on the valve body 1. All be equipped with seal groove 1.6 in the handle hole 1.4 of valve body 1 and on the ball seat 4, be equipped with two ring structure sealing washers 4.3 in the seal groove 1.6, under the feasible prerequisite of assurance intensity and processing, do not establish the seal groove on the handle key 2, but set up in handle key 2 hole department of valve body 1, thereby the diameter minimum can be done to handle key 2, the handle hole 1.4 of opening on the valve body 1 also can accomplish minimumly simultaneously, the intensity of valve body 1 has effectively been improved. The valve body 1 is of a tubular structure; the valve body 1 is provided with a ball seat limiting ring 1.1, an internal thread 1.2 for installing a spare cap 5 and a retainer groove 1.3 for installing a circlip 7 for a hole; the lower part of the operation hole 1.4 is provided with a sealing groove 1.6 for installing a sealing ring 4.3 with a double-retainer structure. The internal thread 1.2 in the inner hole of the valve body 1 is connected with the external thread 5.1 of the spare cap 5, so that the compression adjustment of the ball seat 4 and the ball core 3 is realized, and the device is particularly suitable for adjusting the situation that the combined height of the ball core 3 and the ball seat 4 is shortened after the plug valve is used in a well for a period of time after the plug valve is worn; so as to simplify the structure of the plug valve and improve the repeated use times of the ball core 3 component. An operation hole 1.4 is formed in one side of the valve body 1, a limiting boss 1.5 is arranged at the orifice of the operation hole 1.4, an arc-shaped limiting groove 2.2 is formed in the operation key 2, the operation key 2 can only rotate within 90 degrees through the rotation matching of the limiting boss 1.5 and the arc-shaped limiting groove 2.2, the bottom of the operation key 2 is connected with a key groove 3.3 in the valve core 3 through a linear convex key 2.3 to jointly realize the opening and closing functions of the cock valve, and the number of the limiting bosses 1.5 and the number of the arc-shaped limiting grooves 2.2 of the operation key 2 can be 1, 2 or 3; in addition, the bottom of the operating key 2 is provided with a limiting ring 2.5, the limiting ring 2.5 is provided with a soft metal sealing gasket 2.6, and the soft metal sealing gasket 2.6 is made of soft metal materials with sealing and self-lubricating functions, so that the operating key 2 is prevented from being ejected out of the operating hole 1.4 by water pressure in a water flow channel, meanwhile, the sealing function is achieved, and the rotating torque can be reduced when a pressure switch is operated; the bottom of the operating key 2 is connected with a key groove 3.3 on the ball core 3 through a linear convex key 2.3, so that the purposes of simplifying the structure of the plug valve and improving the reliability of the plug valve are achieved. The operating key 2 is of a cylindrical structure; a knob hole 2.1 is arranged in the center of the top end of the operating key 2, and the knob hole 2.1 can be an inner hexagonal hole or an inner square hole; the edge of the top end of the operating key 2 is provided with an arc-shaped limiting groove 2.2, and the limiting boss 1.5 is positioned in the arc-shaped limiting groove 2.2; the bottom end of the operating key 2 is provided with a linear convex key 2.3, and the cylindrical excircle above the linear convex key 2.3 is provided with a limiting ring 2.5; the top surface of the limiting ring 2.5 is provided with an oil groove 2.4. The ball core 3 is of a spherical structure, a smooth through hole 3.1 with the roughness not less than 3.2 is arranged on the ball core 3, and the central axis of the smooth through hole 3.1 is superposed with the central axis of the valve body 1; an operation plane 3.2 parallel to the central axis of the smooth through hole 3.1 is arranged on the ball core 3, and a key groove 3.3 vertical to the central axis of the smooth through hole 3.1 is arranged on the operation plane 3.2; the key groove 3.3 is matched and connected with the linear convex key 2.3; the center of the key groove 3.3 is provided with a small hole 3.4. The ball seats 4 at the upper and lower ends of the ball core 3 have the same structure and are all in a convex circular tube structure; the inner hole of the round tube of the ball seat 4 is a smooth inner hole 4.4 with the roughness not less than 3.2, and the matching surface of the large-head end tube orifice of the ball seat 4 and the ball body of the ball core 3 is an inner concave spherical surface 4.1. The spare cap 5 is a circular tube structure, and the inner hole of the circular tube is a smooth inner hole with the roughness not less than 3.2; the outer circle of the spare cap 5 is provided with an external thread 5.1, and the external thread 5.1 is matched and connected with an internal thread 1.2 in the valve body 1; a group of screwing grooves 5.2 for screwing the spare cap 5 are arranged at the pipe orifice at the top of the spare cap 5. The springs 6 are respectively arranged on the steps of the excircle of the ball seat 4 at the upper end and the lower end, and the springs 6 are corrugated springs or a group of uniformly distributed cylindrical springs.
The structure is attached, and as can be seen from fig. 3, a limiting boss 1.5 is arranged at the orifice of an operation hole 1.4 of the valve body 1; fig. 4 shows that the operating key 2 is provided with an arc-shaped limiting groove 2.2; the operating key 2 can only rotate within a range of 90 degrees through the rotating matching of the limiting lug bosses 1.5 and the arc-shaped limiting grooves 2.2, meanwhile, the bottom of the operating key 2 is connected with the key groove 3.3 on the ball core 3 through the linear convex key 2.3 to jointly realize the opening and closing functions of the cock valve, and the number of the limiting lug bosses 1.5 and the number of the arc-shaped limiting grooves 2.2 of the operating key 2 can be 1, 2 or 3; in addition, the bottom of the operating key 2 is provided with a limiting ring 2.4 to prevent the operating key 2 from being ejected out of the operating hole 1.4 by water pressure in the water flow channel; the bottom of the operating key 2 is connected with a key groove 3.3 on the ball core 3 through a linear convex key 2.3, so that the purposes of simplifying the structure of the plug valve and improving the reliability of the plug valve are achieved. The upper ball seat 13 and the lower ball seat 14 with different structures at the upper end and the lower end of the ball core 3 are standardized and designed into the ball seat 4 with a unified structure, so that the upper ball seat and the lower ball seat can be interchanged, and the processing procedure is simplified. The spare cap 5 positioned above the ball seat 4 is connected with the valve body 1 through threads, so that the ball seat 4 and the ball core 3 are tightly pressed and adjusted; to simplify the structure of the plug valve.
As shown in fig. 1, 2 and 3, the improved structure of the plug valve of the present embodiment is that, for the sealing ring structure between the operation key 2 and the valve body 1, the solution of the present embodiment is preferably that a sealing ring groove 1.6 is arranged on the valve body 1 corresponding to the operation hole 1.4, and a sealing ring with a 4.3 double-retainer structure is arranged, so that the advantages are that: 1. the reverse installation of the double check rings is avoided; 2. the check ring can be installed without cutting a groove opening and cannot be cut when an operation key is installed; 3. the structure of the operating key 2 is simpler, the corresponding sealing surface is a smooth cylindrical surface, the diameter of the cylinder can be minimized when the same internal square or internal hexagonal size exists in the knob hole 2.1, namely the strength of the operating key is the best, and meanwhile, the hole formed in the valve body can also be minimized, so that the strength of the valve body is improved, and the reliability of the valve body is effectively ensured. Naturally, the structure can also be easily modified, the operating hole and the sealing ring groove arranged on the operating hole at the operating key are designed and placed on the operating key, and the corresponding valve body hole is a smooth inner hole, which is also the structure modification at the operating key. As shown in fig. 1 and 2, the improved structure of the plug valve of this embodiment is mainly composed of a valve body 1, an operation key 2, a ball core 3, a ball seat 4, a backup cap 5, a spring 6, a circlip for hole 7, a double-circlip structure seal 8, and the like. As shown in fig. 3, the operation hole 1.4 of the valve body 1 is a sealing hole with steps, and a limit boss 1.5 is arranged outside the orifice of the operation hole 1.4, the limit boss 1.5 is matched with an arc limit groove 2.2 on the operation key 2 in a rotating way to limit the operation key to rotate only within 90 degrees, and is matched with a linear convex key 2.3 at the bottom of the operation key 2 and a key groove 3.3 on the ball core 3 in a connecting way to jointly operate to open and close the sealed ball core 3; as shown in FIG. 4, the top center of the operation key 2 is provided with a hexagonal or square inner turning hole 2.1 for turning the operation key 2 by a hexagonal or square wrench. A threaded blind hole 2.7 is arranged at the bottom of the knob hole 2.1; when the operation key 2 is assembled, the operation key 2 can be easily pulled to be in place through the tool connecting thread blind hole 2.7, and the assembling efficiency is improved. When being equipped with spacing ring 2.5 on the operating key 2 and avoiding the rivers passageway internal pressure, operating key 2 is ejecting from operation hole 1.4, and the in-line convex key 2.3 embedding of operating key 2 bottom is in the keyway 3.3 of ball core 3, realizes the rotatory linkage of operating key 2 and ball core 3 two. As shown in fig. 5, the ball core 3 is provided with a smooth through hole 3.1, and the central axis of the smooth through hole 3.1 is coincided with the central axis of the valve body 1 in the open state of the plug valve; the central axis of the smooth through hole 3.1 in the closed state of the plug valve is vertical to the central axis of the valve body 1. The spring 6 is installed on the step outside the ball seat 4 to prevent corrosive liquid such as mud from being deposited in the pit from soaking the spring, thereby prolonging the service life of the spring. The spring is preferably a wave spring; a ring of cylindrical springs may be arranged along the circumference of the outer step of the ball seat 4. The external screw thread 5.1 of the spare cap 5 cooperates with the internal screw thread 1.2 in the valve body 1, can adjust the compression of spring, is particularly suitable for the maintenance condition that the ball core subassembly overall height reduces after using, a set of keyway 3.3 of the spare cap 5 upper end is used for revolving 2.5 top surfaces of spacing ring on the 5 manipulating keys 2 of the spare cap and is equipped with 1 ~ 2 circles of arcuation oil groove 2.4, the oil groove 2.4 bottom is the circular arc bottom, the oil groove 2.4 upper end and the sealed 2.6 cooperation of soft metal pad. The oil groove 2.4 can be used for storing oil and lubricating, can also avoid the situation that the sealing gasket is not sealed after being reversely arranged, and greatly reduces the friction resistance when the pressure switch is operated. In the embodiment, the valve body 1, the operation key 2, the ball seat 4 and the spare cap 5 are all provided with the sealing grooves 1.6, the sealing rings are arranged in the sealing grooves 1.6, the sealing rings are all of sealing structures of double check rings and O-shaped rings, so that the assembly is convenient, the condition that the unidirectional sealing structure is assembled reversely and is not sealed can be avoided, and the bidirectional high-pressure sealing and guiding support performance is realized.
The plug valve of the embodiment can be used for high-pressure plug valves with double operating keys, drill rod plug valves, top drive plug valves, full open type safety valves or tubing plug valves.

Claims (10)

1. An improvement method of a plug valve, characterized in that: the method is characterized in that a limiting boss is arranged at an orifice of an operation hole of a valve body, an arc-shaped limiting groove is arranged on an operation key, and the operation key can only rotate within a 90-degree range through the matching of the limiting boss and the arc-shaped limiting groove; in addition, the bottom of the operating key is provided with a limiting ring to prevent the operating key from being ejected out of the operating hole by water pressure in the water flow channel; the bottom of the operating key is connected with the key groove on the valve core through a straight convex key, so that the purposes of simplifying the structure of the plug valve and improving the reliability of the plug valve are achieved.
2. The improvement of the stopcock of claim 1, wherein: the upper ball seat and the lower ball seat at the upper end and the lower end of the valve core are designed into standard ball seats with the same structure, so that the processing procedure is simplified and the upper ball seat and the lower ball seat can be used interchangeably; the small hole is additionally arranged in the center of the key groove of the valve core, so that the rapid exhaust during the pressing test is facilitated, and the pressing efficiency is improved.
3. The improvement of the stopcock of claim 1, wherein: connecting a standby cap positioned at the top of the standard ball seat with the valve body through threads to realize the adjustment and positioning of the standard ball seat and the valve core in a pressing manner; to simplify the structure of the plug valve.
4. An improved structure of a plug valve formed by any one of the improved methods of claims 1 to 3, comprising a valve body (1), wherein: an operating key (2) is arranged on one side of the valve body (1); the operating key (2) is matched and connected with the ball core (3) in the valve body (1); ball seats (4) are respectively arranged at the upper end and the lower end of the ball core (3); a spare cap (5) is arranged at the top of the ball seat (4) above the ball core (3); a spring (6) is arranged between the spare cap (5) and the ball seat (4) and between the ball seat (4) and the valve body (1); the top of the equipment cap (5) is provided with an elastic retainer ring (7) for holes.
5. The improved structure of the plug valve according to claim 4, characterized in that: the valve body (1) is of a tubular structure; the valve body (1) is provided with a ball seat limiting ring (1.1), an internal thread (1.2) for installing a spare cap (5) and a retainer ring groove (1.3) for installing a circlip (7) for a hole; one side of the valve body (1) is provided with an operation hole (1.4), the orifice of the operation hole (1.4) is provided with a limiting boss (1.5), and the lower part of the operation hole (1.4) is provided with an operation hole sealing groove (1.6) for installing a sealing ring with a double check ring structure.
6. The improved structure of the plug valve according to claim 4, characterized in that: the operating key (2) is of a cylindrical structure; a knob hole (2.1) is arranged in the center of the top end of the operating key (2), and a threaded blind hole (2.7) is arranged at the bottom of the knob hole (2.1); the edge of the top end of the operating key (2) is provided with an arc-shaped limiting groove (2.2), the arc-shaped limiting groove (2.2) is rotationally matched with a limiting boss (1.5) at the orifice of an operating hole (1.4) on one side of the valve body (1), and the number of the limiting bosses (1.5) and the number of the arc-shaped limiting grooves (2.2) of the operating key (2) are 1-3; the bottom end of the operating key (2) is provided with a linear convex key (2.3), and the cylindrical excircle above the linear convex key (2.3) is provided with a limit ring (2.5); an oil groove (2.4) is arranged on the top surface of the limiting ring (2.5), and a soft metal sealing gasket (2.6) is arranged on the oil groove (2.4) on the top surface of the limiting ring (2.5).
7. The improved structure of the plug valve according to claim 4, characterized in that: a smooth through hole (3.1) is formed in the ball core (3), and the central axis of the smooth through hole (3.1) is superposed with the central axis of the valve body (1); an operation plane (3.2) parallel to the central axis of the smooth through hole (3.1) is arranged on the ball core (3), and a key slot (3.3) vertical to the central axis of the smooth through hole (3.1) is arranged on the operation plane (3.2); the key groove (3.3) is matched and connected with the linear convex key (2.3) at the bottom end of the operation key (2); the center of the key groove (3.3) is provided with a small hole (3.4).
8. The improved structure of the plug valve according to claim 4, characterized in that: the ball seats (4) at the upper end and the lower end of the ball core (3) have the same structure and are all of convex circular tube structures; the large-head end pipe orifice of the ball seat (4) and the ball matching surface of the ball core (3) are concave spherical surfaces (4.1), the outer diameter of the small-head pipe end of the ball seat (4) is provided with a ball seat sealing groove (4.2), a sealing ring (4.3) with a double-retainer ring structure is arranged in the ball seat sealing groove (4.2), and the large-head end surface of the ball seat (4) is a full flat surface (4.5).
9. The improved structure of the plug valve according to claim 4, characterized in that: the spare cap (5) is of a circular tube structure; an external thread (5.1) is arranged on the outer circle of the spare cap (5), and the external thread (5.1) is matched and connected with an internal thread (1.1) in the valve body (1); a group of screwing grooves (5.2) for screwing the spare cap (5) are arranged at the pipe orifice at the top of the spare cap (5); the spring (6) is a corrugated spring or a group of uniformly distributed cylindrical springs.
10. The improved structure of the plug valve according to claim 9, characterized in that: the water flow channel of the valve body (1), the water flow channel of the ball core (3) and the ball seats (4) at the upper and lower ends thereof, and the water flow channel formed by the spare cap (5) and the inner hole of the valve body (1) are smooth drift diameters with the same diameter.
CN201911011632.7A 2019-09-30 2019-10-23 Improved method and structure of plug valve Pending CN110657258A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910945352 2019-09-30
CN2019109453527 2019-09-30

Publications (1)

Publication Number Publication Date
CN110657258A true CN110657258A (en) 2020-01-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911011632.7A Pending CN110657258A (en) 2019-09-30 2019-10-23 Improved method and structure of plug valve

Country Status (1)

Country Link
CN (1) CN110657258A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111637242A (en) * 2020-06-05 2020-09-08 康健 Heating and ventilation heat supply core-replaceable cock quick-opening valve
CN112943963A (en) * 2021-02-09 2021-06-11 贵州高峰石油机械股份有限公司 Integral safety valve
CN113883296A (en) * 2020-07-03 2022-01-04 包头北方创业有限责任公司 Plug valve for asphalt tank truck

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111637242A (en) * 2020-06-05 2020-09-08 康健 Heating and ventilation heat supply core-replaceable cock quick-opening valve
CN113883296A (en) * 2020-07-03 2022-01-04 包头北方创业有限责任公司 Plug valve for asphalt tank truck
CN112943963A (en) * 2021-02-09 2021-06-11 贵州高峰石油机械股份有限公司 Integral safety valve
CN112943963B (en) * 2021-02-09 2024-05-28 贵州高峰石油机械股份有限公司 Integral relief valve

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