CN110939753A - Hard sealing ball valve - Google Patents
Hard sealing ball valve Download PDFInfo
- Publication number
- CN110939753A CN110939753A CN201811118733.XA CN201811118733A CN110939753A CN 110939753 A CN110939753 A CN 110939753A CN 201811118733 A CN201811118733 A CN 201811118733A CN 110939753 A CN110939753 A CN 110939753A
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- Prior art keywords
- valve
- ball
- valve seat
- seat
- flower
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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
- F16K5/08—Details
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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
- F16K5/0663—Packings
- F16K5/0684—Packings on the plug
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention discloses a hard sealing ball valve which comprises a valve body, a valve cover, a valve seat, a valve rod gland, a valve seat gland and a ball body, wherein the valve cover is arranged on the valve body; a transverse cavity is arranged in the valve body, the upper part of the cavity of the valve body is of an opening structure, and the diameter of the opening is larger than that of the ball body; the two valve seats are respectively arranged on the left side and the right side of the transverse cavity of the valve body, the two valve seat pressing covers are respectively positioned on the outer sides of the two valve seats and are fixed with the transverse cavity of the valve body through threads, and springs are arranged between the valve seat pressing covers and the valve seats; the ball body penetrates through the opening structure at the upper part of the valve body, is arranged between the two valve seats and is contacted with the valve seats; the end of the valve seat close to the ball body is in a step shape, the upper end and the lower end of the ball body are provided with flower-shaped discs, and the flower-shaped discs are meshed with the valve seat and rotate together with the ball body to drive the valve seat to move along the transverse cavity. The invention provides the hard sealing ball valve which is simple in structure, the valve seat is not in contact with the ball body when the ball valve is opened and closed, and the abrasion of the ball body is reduced.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a hard seal ball valve.
Background
The ball valve has the characteristics of small flow resistance, high opening and closing speed, simplicity in operation and the like, so that the ball valve is widely used in petroleum, chemical engineering, power stations, petroleum and natural gas long-distance pipelines and the like. The sealing of a ball valve is formed by a pre-set pre-tightening force between a valve body and a valve seat, which is called a specific sealing pressure, and the specific sealing pressure of a general ball valve is formed by an elastic element arranged between the matching parts of the valve seat and the valve body, such as a belleville spring, a columnar spring and the like. In the opening and closing process of the ball valve, the pretightening force always acts on the surface of the sealing pair, so that the opening and closing torque of the ball valve is larger than that of other valves. Meanwhile, the pretightening force also increases the abrasion of the surface of the ball body, and the service life of the ball body is directly related to the service life of the whole ball valve because the ball body is difficult to manufacture and replace.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defects in the prior art, the invention aims to provide the hard sealing ball valve which is simple in structure, does not contact a valve seat with a ball body when being opened and closed and reduces the abrasion of the ball body.
The technical scheme is as follows: in order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a hard ball valve comprises a valve body, a valve cover, a valve seat, a valve rod gland, a valve seat gland and a ball body; a transverse cavity is arranged in the valve body, the upper part of the cavity of the valve body is of an opening structure, and the diameter of the opening is larger than that of the ball body; the two valve seats are respectively arranged on the left side and the right side of the transverse cavity of the valve body, the two valve seat pressing covers are respectively positioned on the outer sides of the two valve seats and are fixed with the transverse cavity of the valve body through threads, and springs are arranged between the valve seat pressing covers and the valve seats; the ball body penetrates through the opening structure at the upper part of the valve body, is arranged between the two valve seats and is contacted with the valve seats; the valve cover is arranged at the upper end of the opening structure of the valve body and is connected with the valve body through a bolt, and the valve rod penetrates through the valve cover and is connected with the ball body; the valve rod gland penetrates through the valve rod and is connected with the valve cover; the disk seat is close to spheroidal one end and is the ladder shape, spheroidal upper and lower both ends are provided with the flower type disc, and the flower type disc meshes with the disk seat mutually and rotates along with the spheroid and drives the motion of disk seat along horizontal cavity.
Preferably, the flower-shaped disc is in the shape of four arc bulges which are separated by 90 degrees, one end of the valve seat close to the ball body is in a step shape, the upper part of the step shape is a convex end, and the transverse section of the convex end is in the shape of the arc bulge corresponding to the flower-shaped disc and is meshed with the arc bulge of the flower-shaped disc; the stepped lower part of the valve seat is contacted with the ball body; the length of the spring between the valve seat and the valve seat gland is not less than the radius of the arc bulge of the flower-shaped disc.
Preferably, a bearing and a seal ring are provided between the valve stem and the bonnet.
Preferably, the upper end of the valve rod is connected with a handle, and a protective sleeve is arranged on the handle.
Preferably, the upper end of the valve rod is connected with a handle, and a protective sleeve is arranged on the handle.
Preferably, the spring between the valve seat and the valve seat gland is an annular spring or a wave spring.
Has the advantages that: compared with the prior art, the invention has the following advantages: the valve has compact and simple structure; the valve seat is not contacted with the ball body in the opening and closing process, no friction exists, and the service lives of the ball body and the whole valve are prolonged.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a transverse cross-sectional view of the flower-shaped disc engaging the nipple of the valve seat;
fig. 3 is a transverse cross-sectional view of the flower disc of fig. 2 shown engaged with the raised end of the valve seat during a 45 ° movement.
Detailed Description
The invention will be further elucidated with reference to the drawing.
As shown in fig. 1, a hard seal ball valve comprises a valve body 1, a valve cover 2, a valve seat 3, a valve rod 4, a valve rod gland 5, a valve seat gland 6 and a ball body 7; a transverse cavity is arranged in the valve body 1, the upper part of the cavity of the valve body 1 is of an opening structure, and the diameter of the opening is larger than that of the ball body 7; the two valve seats 3 are respectively arranged at the left side and the right side of the transverse cavity of the valve body 1, the two valve seat pressing covers 6 are respectively positioned at the outer sides of the two valve seats 3 and are fixed with the transverse cavity of the valve body 1 through threads, and a spring 8 is arranged between the valve seat pressing covers 6 and the valve seats 3; the ball 7 is arranged between the two valve seats 3 through the opening structure at the upper part of the valve body 1 and is contacted with the valve seats 3; the valve cover 2 is arranged at the upper end of the opening structure of the valve body 1 and is connected with the valve body 1 through a bolt, and the valve rod 4 penetrates through the valve cover 2 and is connected with the ball body 7; the valve rod gland 5 passes through the valve rod 4 and is connected with the valve cover 2; the end of the valve seat 3 close to the ball body 7 is in a step shape, the upper end and the lower end of the ball body 7 are provided with flower-shaped discs 9, and the flower-shaped discs 9 are meshed with the valve seat 3 and rotate together with the ball body 7 to drive the valve seat 3 to move along a transverse cavity.
As shown in fig. 2-3, the flower-shaped disc 9 is in the shape of four arc protrusions spaced at 90 degrees, one end of the valve seat 3 close to the ball 7 is in a step shape, wherein the upper part of the step shape is a protruding end, and the transverse section of the protruding end is in the shape of the arc protrusion corresponding to the flower-shaped disc 9 and is meshed with the arc protrusion of the flower-shaped disc 9; the stepped lower part of the valve seat 3 is contacted with the ball body 7; the length of the spring 8 between the valve seat 3 and the valve seat gland 6 is not less than the radius of the circular arc bulge of the flower-shaped disc 9. The valve seat 3 is arranged close to the ball body and is provided with a step shape with the upper part protruding, so that the contact surface of the valve seat 3 and the flower-shaped disc 9 is staggered with the contact surface of the valve seat 3 and the ball body 7, the sealing of the valve seat 3 and the ball body 7 is facilitated, and the processing and the manufacturing of the arc bulge of the protruding end of the valve seat are facilitated.
The working principle of the invention is as follows: when the valve is closed, the ball body 7 and the flower-shaped disc 9 rotate 90 degrees clockwise, when the arc bulge of the flower-shaped disc 9 rotates, the arc concave part of the convex end of the valve seat 3 passes through the arc bulge, so that climbing movement to downhill movement is formed, because the flower-shaped disc 9 is fixed, the valve seat 3 must move transversely outwards to enable the arc bulge of the flower-shaped disc 9 to pass through the arc bulge of the convex end of the valve seat 3, in the process, the valve seat 3 and the ball body 7 are separated for a short time, when the flower-shaped disc 9 rotates 90 degrees, the flower-shaped disc 9 is meshed with the convex end of the valve seat 3 again, the valve seat 3 is contacted with the ball body 7 again, and the. When the valve needs to be opened again, the flower-shaped disc 9 and the ball body 7 rotate 90 degrees anticlockwise, the process is repeated, the valve is opened, the ball body 7 and the valve seat 3 are separated in the opening and closing process of the valve, friction is avoided between the valve seat 3 and the ball body 7, the service life of the ball body 7 is prolonged, and the service life of the whole valve is prolonged.
The sealing of valve rod 4 and valve gap 2 has two kinds of modes, and the first is that the packing is sealed, is equipped with the packing box between valve rod 4 and valve gap 2, is equipped with the packing in the packing box, realizes valve rod 4's sealed from this. The second is to arrange a bearing and a sealing ring between the valve rod 4 and the valve cover 2 to realize the rotation and sealing of the valve rod 4.
The upper end of the valve rod 4 is connected with a handle 10, and a protective sleeve is arranged on the handle.
The spring 8 between the valve seat 3 and the valve seat gland 6 is a ring spring or a wave spring.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A hard seal ball valve, its characterized in that: comprises a valve body (1), a valve cover (2), a valve seat (3), a valve rod (4), a valve rod gland (5), a valve seat gland (6) and a ball body (7); a transverse cavity is arranged in the valve body (1), the upper part of the cavity of the valve body (1) is of an opening structure, and the diameter of the opening is larger than that of the ball body (7); the two valve seats (3) are respectively arranged at the left side and the right side of the transverse cavity of the valve body (1), the two valve seat pressing covers (6) are respectively positioned at the outer sides of the two valve seats (3) and are fixed with the transverse cavity of the valve body (1) through threads, and springs (8) are arranged between the valve seat pressing covers (6) and the valve seats (3); the ball body (7) penetrates through the opening structure at the upper part of the valve body (1) and is arranged between the two valve seats (3) and is contacted with the valve seats (3); the valve cover (2) is arranged at the upper end of the opening structure of the valve body (1) and is connected with the valve body (1) through a bolt, and the valve rod (4) penetrates through the valve cover (2) and is connected with the ball body (7); the valve rod gland (5) penetrates through the valve rod (4) and is connected with the valve cover (2); the one end that disk seat (3) are close to spheroid (7) is the ladder shape, the upper and lower both ends of spheroid (7) are provided with flower type disc (9), and flower type disc (9) and disk seat (3) mesh mutually and rotate together along with spheroid (7) and drive disk seat (3) along horizontal cavity motion.
2. The hard-seal ball valve of claim 1, wherein: the flower-shaped disc (9) is in the shape of four arc bulges which are separated by 90 degrees, one end of the valve seat (3) close to the ball body (7) is in a step shape, the upper part of the step shape is a protruding end, and the transverse section of the protruding end is in the shape of the arc bulge corresponding to the flower-shaped disc (9) and is meshed with the arc bulge of the flower-shaped disc (9); the stepped lower part of the valve seat (3) is contacted with the ball body (7); the length of the spring (8) between the valve seat (3) and the valve seat gland (6) is not less than the radius of the circular arc bulge of the flower-shaped disc (9).
3. The hard-seal ball valve of claim 1, wherein: a stuffing box is arranged between the valve rod (4) and the valve cover (2), and stuffing is arranged in the stuffing box.
4. The hard-seal ball valve of claim 1, wherein: and a bearing and a sealing ring are arranged between the valve rod (4) and the valve cover (2).
5. The hard-seal ball valve of claim 1, wherein: the upper end of the valve rod (4) is connected with a handle (10), and a protective sleeve is arranged on the handle.
6. The hard-seal ball valve of claim 1, wherein: and a spring (8) between the valve seat (3) and the valve seat gland (6) is an annular spring or a wave spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118733.XA CN110939753A (en) | 2018-09-25 | 2018-09-25 | Hard sealing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811118733.XA CN110939753A (en) | 2018-09-25 | 2018-09-25 | Hard sealing ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110939753A true CN110939753A (en) | 2020-03-31 |
Family
ID=69905201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811118733.XA Pending CN110939753A (en) | 2018-09-25 | 2018-09-25 | Hard sealing ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110939753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404876A (en) * | 2021-07-06 | 2021-09-17 | 王春红 | Butterfly valve |
-
2018
- 2018-09-25 CN CN201811118733.XA patent/CN110939753A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404876A (en) * | 2021-07-06 | 2021-09-17 | 王春红 | Butterfly valve |
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