阅读说明：本技术 一种具有活动密封环的阀球及球阀 (Valve ball with movable sealing ring and ball valve ) 是由 谢正泽 *** 吴平 叶友海 黄亚光 陈浩 李增有 张炎 于 2020-06-29 设计创作，主要内容包括：本发明提供一种具有活动密封环的阀球及球阀,其中阀球包括：球体；活动密封环,可转动地安装在球体上,具有环形密封面；环形密封面为偏心密封面；活动密封环具有固定状态和可转动状态,活动密封环处于固定状态时,活动密封环和球体固定为一体；活动密封环处于可转动状态时,在外力作用下,环形密封面能够相对阀座密封面转动。本发明的阀球,当装配时发生阀座密封面与环形密封面不能紧密接触实现密封时,可将活动密封环调松至可转动状态,逐渐转动活动密封环,直至环形密封面与阀座密封面紧密接触密封,此时再将活动密封环固定在球体上,即实现了阀球的精密装配。(The invention provides a valve ball with a movable sealing ring and a ball valve, wherein the valve ball comprises: a sphere; the movable sealing ring is rotatably arranged on the ball body and is provided with an annular sealing surface; the annular sealing surface is an eccentric sealing surface; the movable sealing ring has a fixed state and a rotatable state, and when the movable sealing ring is in the fixed state, the movable sealing ring and the ball body are fixed into a whole; when the movable sealing ring is in a rotatable state, the annular sealing surface can rotate relative to the sealing surface of the valve seat under the action of external force. When the valve ball is assembled, the sealing surface of the valve seat and the annular sealing surface can not be in close contact to realize sealing, the movable sealing ring can be loosened to be in a rotatable state, the movable sealing ring is gradually rotated until the annular sealing surface and the sealing surface of the valve seat are in close contact to realize sealing, and at the moment, the movable sealing ring is fixed on the ball body, so that the precise assembly of the valve ball is realized.)

1. A valve ball having a movable sealing ring, characterized by: the method comprises the following steps:

a sphere (1);

a movable sealing ring (2) rotatably mounted on the ball (1) and having an annular sealing surface (21); the annular sealing surface (21) is an eccentric sealing surface;

the movable sealing ring (2) has a fixed state and a rotatable state, and when the movable sealing ring (2) is in the fixed state, the movable sealing ring (2) and the ball body (1) are fixed into a whole; when the movable sealing ring (2) is in a rotatable state, the annular sealing surface (21) can rotate relative to the valve seat sealing surface (31) under the action of external force.

2. The valve ball of claim 1, wherein: the movable sealing ring (2) comprises an annular main body (22), a rotating hole (20) is formed in the middle of the annular main body (22), and the annular sealing surface (21) is arranged on the periphery of the annular main body (22).

3. The valve ball of claim 2, wherein: the rotating hole (20) is a through hole.

4. The valve ball of claim 3, wherein: the ball body (1) is provided with:

a first plane (11) formed at one end of the ball (1) for sealing;

a first step pillar (12) formed on the first plane (11) and perpendicular to the first plane (11); the first step column (12) is suitable for the rotating hole (20) to be rotatably sleeved, and the height of the first step column (12) is less than or equal to the thickness of the movable sealing ring (2);

and the gland (4) is detachably and fixedly arranged on the ball body (1) and is used for fixing the movable sealing ring (2) sleeved on the first step column (12).

5. The valve ball of claim 4, wherein: be equipped with second plane (13) on first step post (12) top surface, the shaping has second step post (14) on second plane (13), gland (4) cover is established back on second step post (14), through bolt (5) fixed mounting in on second plane (13).

6. The valve ball of claim 5, wherein: and the first plane (11) opposite to the movable sealing ring (2) is provided with a sealing ring mounting groove (6), and a sealing ring is arranged in the sealing ring mounting groove (6).

7. The valve ball of claim 5, wherein: and a bolt groove (41) is formed in one end, far away from the ball body (1), of the gland (4), and after the gland (4) is fixedly installed on the second plane (13) through the bolt (5), the head of the bolt (5) is immersed into the bolt groove (41).

8. The valve ball of claim 1, wherein: the sphere is a C-shaped sphere.

9. A ball valve comprises a valve body (71), a valve ball arranged in the valve body (71) through a valve rod (72), a valve cover (73) arranged on the valve body (71), and a valve seat (3) arranged on the inner side of the valve cover (73), wherein a valve seat sealing surface (31) is arranged on the valve seat (3);

the method is characterized in that: the valve ball is as defined in any one of claims 1 to 8, and the annular sealing surface (21) and the valve seat sealing surface (31) are both eccentric sealing surfaces.

10. The ball valve according to claim 9, wherein: the annular sealing surface (21) of the movable sealing ring (2) extends out of the sphere (1) for a certain distance.

Technical Field

The invention relates to the technical field of ball valves, in particular to a valve ball with a movable sealing ring and a ball valve.

Background

The ball valve is one of valves widely used, has simple structure, reliable sealing and convenient maintenance, and is widely applied to the fields of petroleum, chemical engineering, metallurgy, light spinning, food, atomic energy, aviation and the like. The ball valve has 90 deg rotation action, and the cock body is one ball with circular through hole or passage in the axis and is used mainly in pipeline to cut off, distribute and change the flow direction of medium and may be closed tightly only through 90 deg rotation and small rotation moment.

The sealing of the conventional ball valve depends on the precise extrusion sealing of the valve seat sealing surface and the ball sealing surface, the requirements on the machining precision and the installation precision of the valve seat sealing surface and the ball sealing surface are very high, once slight deviation occurs in machining or installation, bias voltage is likely to occur, the sealing effect is influenced, and the sealing can be failed in a severe case. The valve seat in the prior art is usually fixedly arranged on the valve cover, and when the ball valve is closed, the spherical surface of the valve ball is in extrusion contact with the valve seat sealing surface of the valve seat to realize sealing; the requirement on the installation accuracy of the valve seat is high, multiple fine adjustment processes are usually involved, even if the installation accuracy is achieved at the beginning, bias abrasion can occur after a certain period of time of subsequent use, the sealing pressure between the sealing surface of the valve seat and the spherical surface is uneven, the sealing strength is further reduced, and serious sealing failure can even be caused.

Chinese patent document CN108980400B discloses an eccentric ball valve, in which a valve seat is installed on a valve cover in a micro-movable manner by an adjustable installation structure, and a gap is formed between the outer circumferential surface of the valve seat and the valve cover; under the drive of the operating mechanism, when the valve ball rotates to enable the valve ball sealing surface to be gradually in extrusion contact with the valve seat sealing surface, the valve seat can make micro movement along the circumferential direction of the valve ball sealing surface, so that the valve ball sealing surface and the valve seat sealing surface are automatically adjusted and centered, and uniform pressure sealing is further realized. The technical solutions in the above patent documents can solve the problem of fine mounting deviation, but have high requirements for production accuracy.

Therefore, how to design a valve ball which is more convenient to process and use and can solve the technical problem that the installation process needs to be fine-tuned for many times is a technical problem to be solved urgently in the prior art.

Disclosure of Invention

Therefore, the invention aims to solve the technical problem of overcoming the technical defect that the ball valve in the prior art is easy to have slight deviation during installation and does not need to be adjusted for many times, but has high requirement on production precision, thereby providing the ball valve which is more convenient to produce and use.

The invention also provides a ball valve with the valve ball.

To this end, the invention provides a valve ball with a movable sealing ring, comprising:

a sphere;

a movable sealing ring rotatably mounted on the ball body and having an annular sealing surface; the annular sealing surface is an eccentric sealing surface;

the movable sealing ring has a fixed state and a rotatable state, and when the movable sealing ring is in the fixed state, the movable sealing ring and the ball body are fixed into a whole; when the movable sealing ring is in a rotatable state, the annular sealing surface can rotate relative to the sealing surface of the valve seat under the action of external force.

Preferably, the movable sealing ring comprises an annular main body, a rotating hole is formed in the middle of the annular main body, and the annular sealing surface is formed on the periphery of the annular main body.

Preferably, the rotation hole is a through hole.

As a preferable scheme, the ball body is provided with:

a first plane formed at one end of the ball for sealing;

the first step column is formed on the first plane and is perpendicular to the first plane; the first step column is suitable for the rotary hole to be rotatably sleeved, and the height of the first step column is less than or equal to the thickness of the movable sealing ring;

the gland is detachably and fixedly installed on the ball body and used for fixing the movable sealing ring sleeved on the first step column.

As a preferred scheme, a second plane is arranged on the top surface of the first step column, a second step column is formed on the second plane, and the pressing cover is fixedly installed on the second plane through bolts after being sleeved on the second step column.

As a preferred scheme, a sealing ring mounting groove is formed in the first plane opposite to the movable sealing ring, and a sealing ring is mounted in the sealing ring mounting groove.

As a preferable scheme, one end of the gland, which is far away from the ball body, is provided with a bolt groove, and after the gland is fixedly installed on the second plane by the bolt, the head of the bolt is immersed in the bolt groove.

Preferably, the sphere is a C-shaped sphere.

The invention also provides a ball valve which comprises a valve body, a valve ball arranged in the valve body through a valve rod, a valve cover arranged on the valve body and a valve seat arranged on the inner side of the valve cover, wherein the valve seat is provided with a valve seat sealing surface;

the valve ball is the valve ball described in any one of the above, and the annular sealing surface and the valve seat sealing surface are both eccentric sealing surfaces.

Preferably, the annular sealing surface of the movable sealing ring extends out of the ball body for a certain distance.

The technical scheme provided by the invention has the following advantages:

1. the valve ball comprises a ball body and a movable sealing ring which is rotatably arranged on the ball body, wherein the movable sealing ring is provided with an eccentric sealing surface; when the movable sealing ring is in a fixed state, the movable sealing ring and the ball body are fixed into a whole, and the movable sealing ring rotates along with the ball body to realize the opening or the cutting of the flow channel; when the movable sealing ring is in a rotatable state, the annular sealing surface can rotate relative to the sealing surface of the valve seat under the action of external force; when the valve ball is assembled, the sealing surface of the valve seat and the annular sealing surface can not be in close contact to realize sealing, the movable sealing ring can be loosened to be in a rotatable state, the movable sealing ring is gradually rotated until the annular sealing surface and the sealing surface of the valve seat are in close contact to realize sealing, and at the moment, the movable sealing ring is fixed on the ball body, so that the precise assembly of the valve ball is realized. The valve ball can solve the technical problem that fine deviation is easy to occur during installation and multiple times of fine adjustment are needed.

2. The movable sealing ring of the valve ball comprises an annular main body, wherein a rotating hole is formed in the middle of the annular main body, and an annular sealing surface is formed on the periphery of the annular main body; the movable sealing ring is arranged on the ball body through the rotating hole, and when the movable sealing ring needs to be adjusted, the movable sealing ring rotates through the position of the rotating hole.

3. According to the valve ball, the first plane and the first step column are arranged on the ball body, the movable sealing ring is sleeved on the first step column and fixedly arranged on the ball body by using the gland, and the movable sealing ring sleeved on the first step column is extruded and fixed.

4. According to the valve ball, the second plane is arranged on the top surface of the first step column, the second step column is formed on the second plane, and the pressing cover is arranged on the second plane through bolt regulation after being sleeved on the second step column; the second step column and the second plane are designed to facilitate fixation of the gland more conveniently.

5. According to the valve ball, the first plane opposite to the movable sealing ring is provided with the sealing ring installation groove, the sealing ring is installed in the sealing ring installation groove, and sealing is facilitated after the movable sealing ring is installed.

6. The invention also provides a ball valve, which comprises a valve body, a valve rod, a valve ball, a valve seat, a valve cover and the like, wherein the valve ball is the valve ball, and the structure of the valve ball is adopted, so that all advantages brought by the adoption of the structure of the valve ball are naturally realized.

7. According to the ball valve, the annular sealing surface of the movable sealing ring extends out of the periphery for a certain distance, the ball valve is not in contact with the valve seat, and when the ball valve is worn and cannot realize good sealing after being used for a long time, the movable sealing ring can be replaced, so that the equipment elimination cost is reduced.

Drawings

To more clearly illustrate the technical solutions in the prior art or the embodiments of the present invention, the drawings used in the description of the prior art or the embodiments are briefly introduced below.

Fig. 1 is a schematic view of the overall structure of the valve ball of the present invention.

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Reference numerals: 1. a sphere; 11. a first plane; 12. a first step column; 13. a second plane; 14. a second step post; 2. a movable sealing ring; 20. rotating the hole; 21. an annular sealing surface; 22. an annular body; 3. a valve seat; 31. a valve seat sealing surface; 4. a gland; 41. a bolt groove; 5. a bolt; 6. a sealing ring mounting groove; 71. a valve body; 72. a valve stem; 73. and a valve cover.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings.