CN220016158U

CN220016158U - Electric eccentric half ball valve

Info

Publication number: CN220016158U
Application number: CN202321518959.5U
Authority: CN
Inventors: 廖锦农; 周林鹏; 洪兆东; 胡国兰; 梅响林
Original assignee: Xiamen Smk Valve Co ltd
Current assignee: Xiamen Smk Valve Co ltd
Priority date: 2023-06-14
Filing date: 2023-06-14
Publication date: 2023-11-14
Anticipated expiration: 2033-06-14

Abstract

The utility model discloses an electric eccentric half ball valve, which relates to the technical field of valves and comprises a valve body, a packing gland, a valve seat, an upper valve rod, a lower valve rod and a hemispherical eccentric valve core, wherein the upper valve rod and the lower valve rod are respectively and fixedly connected with the hemispherical eccentric valve core, the bottom surface of the lower valve rod, which is downwards contacted with a bottom cover plate of the valve body, is provided with an arc convex surface, and the outer ring of the arc convex surface is provided with a sealing gasket which is matched with the arc convex surface and is arranged in a sectional type horizontally. According to the utility model, the arc convex surface is arranged at the bottom of the lower valve rod, so that the part contacted with the bottom cover plate only has a point contact area of the top of the arc convex surface, thereby greatly reducing friction force during rotation and reducing the torque for opening the valve. The traditional sealing gasket is removed from the middle part, only the part between the cover plate and the valve body is left, the matching with the arc convex surface can be effectively realized, the medium leakage is effectively prevented, the application materials of the sealing gasket are reduced, and the manufacturing cost of the part is reduced.

Description

Electric eccentric half ball valve

Technical Field

The utility model relates to the technical field of valves, in particular to an electric eccentric half ball valve.

Background

Ball valves for cutting off media in pipes are of many kinds, including eccentric semi-ball valves, which are suitable for the control and transport of liquids, gases or deslagging media in transport pipes, mainly for cutting off, distributing and changing the flow speed and direction of the media in the pipes. The eccentric half ball valve is used as a new ball valve class, and has some advantages unique to the self structure, such as no friction of the switch, difficult abrasion of the seal and small opening and closing moment. This reduces the specification of the actuator to be fitted. The medium can be regulated and tightly cut off by being matched with a multi-rotation electric actuating mechanism. The device is widely applicable to the working conditions of petroleum, chemical industry, urban water supply and drainage and the like requiring strict cutting-off. The bottom of the lower valve rod of the traditional eccentric half ball valve is usually a plane bottom, and the lower valve rod is tightly attached to a sealing gasket to prevent medium leakage. However, when the lower valve rod rotates along with the valve core, the plane at the bottom of the lower valve rod is tightly attached to the sealing gasket, so that the valve core rotates with great friction, and the torque for opening the valve is also large enough to be opened or closed. In order to solve the problems, the utility model provides an electric eccentric half ball valve.

Disclosure of Invention

Object of the utility model

In view of the above, the present utility model aims to provide an electric eccentric half ball valve so as to solve the above technical problems.

(II) technical scheme

In order to achieve the technical aim, the utility model provides an electric eccentric half ball valve which comprises a valve body, a packing gland, a valve seat, a valve rod and a hemispherical eccentric valve core, wherein a packing gland is arranged on a sealing cover at the upper part of the valve body, a valve cavity is formed by enclosing between the packing gland and the valve body, a transverse flow channel is formed in the valve cavity, the valve rod comprises an upper valve rod and a lower valve rod, the upper valve rod and the lower valve rod are respectively fixedly connected with the upper end and the lower end of the hemispherical eccentric valve core, the hemispherical eccentric valve core is rotatably arranged in the valve cavity through the upper valve rod and the lower valve rod, the bottom surface of the lower valve rod, which is downwards contacted with a bottom cover plate of the valve body, is provided with an arc convex surface, a sealing gasket matched with the arc convex surface is arranged on the outer ring of the arc convex surface in a sectional type and horizontally arranged at the left side and the right side of the arc convex surface, and the sealing gasket is arranged between the bottom cover plate and the valve body.

Preferably, the upper valve rod extends out of the valve body in a sealing way and is connected with an electric actuator for driving the upper valve rod to rotate, wherein the electric actuator is an existing actuator.

Preferably, the upper valve rod is fixed with the upper end of the hemispherical eccentric valve core through an internal thread taper pin, and an eccentric sleeve is further arranged between the upper valve rod and the hemispherical eccentric valve core so as to achieve the effect of fixing the upper valve rod and the hemispherical eccentric valve core.

Preferably, the lower valve rod is fixed with the lower end of the hemispherical eccentric valve core through an internal thread taper pin, and an eccentric sleeve is further arranged between the lower valve rod and the hemispherical eccentric valve core so as to achieve the effect of fixing the lower valve rod and the hemispherical eccentric valve core.

Preferably, the surface of the hemispherical eccentric valve core is sequentially divided into a connecting section and a sealing section from the valve rod to the valve seat, and the surface of the sealing section is of a semi-elliptic structure.

Preferably, a valve seat pressing ring and an elastic buffer cushion are arranged on the outer side of the valve seat, the elastic buffer cushion is arranged between the valve seat and the valve seat pressing ring, a through adjusting hole is formed in a valve body corresponding to the valve seat pressing ring, and an adjusting screw capable of adjusting the horizontal position is screwed in the adjusting hole through internal threads.

Preferably, the end face of the packing gland, which is contacted with the valve body, is provided with a sealing ring, and the sealing ring is clamped between the supporting ring and the pressing ring, so that the sealing effect between the packing gland and the valve body is effectively realized.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the arc convex surface is arranged at the bottom of the lower valve rod, so that the part contacted with the bottom cover plate only has a point contact area of the top of the arc convex surface, thereby greatly reducing friction force during rotation and reducing the torque for opening the valve. The traditional sealing gasket is removed from the middle part, only the part between the cover plate and the valve body is left, the matching with the arc convex surface can be effectively realized, the medium leakage is effectively prevented, the application materials of the sealing gasket are reduced, and the manufacturing cost of the part is reduced. In addition, the utility model automatically centers in a common track when in rotary motion, can achieve good sealing effect in the closing process of the valve body, and eliminates the abrasion condition of the traditional ball valve seat and the ball sealing surface.

In conclusion, the improved scheme effectively reduces the torque for opening the valve, so that the valve is easier to open and close, and the leakage of the medium is effectively prevented, so that the valve has better applicability.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a cross-sectional view of the internal structure of the present utility model;

fig. 2 is an enlarged view at a in fig. 1.

Description of the drawings: 1. a valve body; 2. a packing gland; 3. a valve seat; 31. valve seat pressing ring, 32 and spring buffer cushion; 4. an upper valve rod; 5. an electric actuator; 6. hemispherical eccentric valve core; 61. a connection section; 62. a sealing section; 7. a lower valve rod; 71. a circular arc convex surface; 8. a sealing gasket; 9. a seal ring; 10. the bottom cover plate, 11, internal thread taper pin.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, the same or similar reference numerals indicate the same or similar parts and features. The drawings merely schematically illustrate the concepts and principles of embodiments of the disclosure and do not necessarily illustrate the specific dimensions and proportions of the various embodiments of the disclosure. Specific details or structures may be shown in exaggerated form in particular figures to illustrate related details or structures of embodiments of the present disclosure.

Referring to fig. 1-2 in detail, the utility model provides an electric eccentric semi-ball valve, which specifically comprises a valve body 1, a packing gland 2, a valve seat 3, a valve rod and a hemispherical eccentric valve core 6, wherein the packing gland 2 is arranged on a sealing cover on the upper part of the valve body 1, the sealing mode is that a sealing ring 9 is arranged between the valve body 1 and the packing gland 2, in order to achieve a limiting effect, the sealing ring 9 is arranged between a supporting ring and a pressing ring, the supporting ring is sleeved on one side close to the valve body, the pressing ring is sleeved on one side close to the packing gland 2, a valve cavity is formed by surrounding between the packing gland 2 and the valve body 1, and a transverse flow passage is formed in the valve cavity.

By controlling the valve, the liquid medium can flow through the lateral flow channels, which are shown in the figure as left and right. The surface of the hemispherical eccentric valve core 6 is sequentially divided into a connecting section 61 and a sealing section 62 from the valve rod to the valve seat 3, and the surface of the sealing section 62 is of a semi-elliptic structure and is matched with the valve seat 3 for use.

Traditional valve rod is integral type, and in eccentric hemisphere valve, in order to match with eccentric hemisphere valve's structure, often set up the valve rod into split type, and the valve rod includes valve rod 4 and lower valve rod 7 promptly, and upper valve rod 4, lower valve rod 7 all are fixed with the upper end and the lower extreme fixed connection of hemisphere eccentric valve core 6 respectively, and specific fixed mode can be through internal thread taper pin 11, and upper and lower valve rod all can be fixed through this kind of form to in order to improve stable rotation, still install eccentric sleeve between upper and lower valve rod and hemisphere eccentric valve core 6.

The hemispherical eccentric valve core 6 is rotatably arranged in the valve cavity through the upper valve rod 4 and the lower valve rod 7, the bottom surface of the lower valve rod 7, which is downwards contacted with the bottom cover plate 10 of the valve body 1, is provided with an arc convex surface 71, the original plane contact surface is changed, the contact part of the lower valve rod 7 and the bottom cover plate 10 is only slightly provided with a head part, the friction force in the rotation process is reduced, and the torque required by opening and closing the valve is effectively reduced; meanwhile, the sealing gasket 8 matched with the lower part of the circular arc convex surface 71 is required to be arranged, the sealing gasket 8 is arranged horizontally in a sectional mode and is respectively arranged on the left side and the right side of the circular arc convex surface 71 horizontally, the sealing gasket 8 is arranged between the bottom cover plate 10 and the valve body 1, and thus the medium leakage can be effectively prevented through the arrangement.

The outside of disk seat 3 installs elasticity blotter 32 and disk seat clamping ring 31 in proper order, and elasticity blotter 32 can make disk seat 3 have certain axial float, and the advantage is self-adaptation pipeline pressure variation, reduces the moment of opening and close, reduces wearing and tearing, improves life. Because of the existence of the eccentricity, the eccentric half ball valve has good self-sealing performance, the sealing effect is better when the pressure is larger, but the opening and closing moment is larger when the pressure is high, the elastic buffer cushion 32 can be compressed and contracted when the pressure is high, the valve seat 3 slightly moves towards the rear direction of the valve, the yield deformation of the eccentric hemisphere is counteracted, and the opening and closing moment is reduced; when the front pressure of the valve is low, the buffer cushion elasticity pushes the valve seat 3 to restore (move towards the water inlet direction), and meanwhile, the sealing specific pressure is provided, so that the low-pressure sealing is ensured. And the valve body 1 corresponding to the valve seat pressing ring 31 is provided with a through adjusting hole, the adjusting hole is internally threaded with an adjusting screw which can adjust the horizontal position, and the valve seat 3 is pushed to the spherical crown surface of the hemispherical eccentric valve core by the adjusting screw along the horizontal direction until the main seal is watertight. The improved scheme is especially suitable for the mediums such as steel industry, aluminum industry, fiber, tiny solid particles, paper pulp, coal ash, petroleum gas and the like, and has strong applicability and good economic effect.

The upper valve rod 4 extends out of the valve body 1 in a sealing way and is connected with an electric actuator 5 for driving the valve body to rotate, and the electric actuator 5 is an existing electric actuator. Specifically, a 220V or 380V power supply is utilized, and the electric actuator 5 drives the valve rod to rotate so as to synchronously drive the hemispherical eccentric valve core 6 to rotate by 90 degrees. When the rotary motion is performed, the common track is automatically centered, and when the valve body is closed, the hemispherical eccentric valve core 6 and the valve seat 3 are completely separated, so that the problem that the traditional spherical valve seat and the spherical sealing surface are always worn is solved. On this basis, it is also conceivable to embed a nonmetallic elastic material in the valve seat 3, so that the metallic surface of the valve seat 3 is well protected.

The exemplary implementation of the solution proposed by the present disclosure has been described in detail hereinabove with reference to the preferred embodiments, however, it will be understood by those skilled in the art that various modifications and adaptations can be made to the specific embodiments described above and that various combinations of the technical features, structures proposed by the present disclosure can be made without departing from the scope of the present disclosure, which is defined by the appended claims.

Claims

1. The utility model provides an electronic eccentric half ball valve, includes valve body (1), gland (2), disk seat (3), valve rod and hemisphere eccentric spool (6), the sealed lid in upper portion of valve body (1) is equipped with gland (2), encloses between gland (2) and valve body (1) and constitutes the valve pocket, is formed with horizontal runner, its characterized in that in the valve pocket: the valve rod includes valve rod (4) and lower valve rod (7), upper valve rod (4), lower valve rod (7) all with the upper end and the lower extreme fixed connection of hemisphere eccentric valve core (6) respectively, hemisphere eccentric valve core (6) are rotationally located in the valve pocket through upper valve rod (4) and lower valve rod (7), the bottom surface that lower valve rod (7) downwards contacted with bottom apron (10) of valve body (1) is established to circular arc convex surface (71), the outer lane of circular arc convex surface (71) is equipped with sealed pad (8) rather than complex, sealed pad (8) are sectional type level setting, respectively the level setting in the left and right sides of circular arc convex surface (71), sealed pad (8) are installed between bottom apron (10) and valve body (1).

2. An electric eccentric half ball valve according to claim 1, characterized in that the upper valve rod (4) extends out of the valve body (1) in a sealing manner and is connected with an electric actuator (5) for driving the valve body in rotation.

3. The electric eccentric half ball valve according to claim 1, wherein the upper ends of the upper valve rod (4) and the hemispherical eccentric valve core (6) are fixed through an internal thread taper pin (11), and an eccentric sleeve is further arranged between the upper valve rod (4) and the hemispherical eccentric valve core (6).

4. The electric eccentric half ball valve according to claim 1, wherein the lower end of the lower valve rod (7) and the lower end of the hemispherical eccentric valve core (6) are fixed through an internal thread taper pin (11), and an eccentric sleeve is further arranged between the lower valve rod (7) and the hemispherical eccentric valve core (6).

5. An electric eccentric half ball valve according to claim 1, characterized in that the surface of the hemispherical eccentric valve core (6) is divided into a connecting section (61) and a sealing section (62) in sequence from the valve rod to the valve seat (3), and the surface of the sealing section (62) is of a semi-elliptic structure.

6. The electric eccentric half ball valve according to claim 1, wherein a valve seat pressing ring (31) and an elastic buffer pad (32) are installed on the outer side of the valve seat (3), the elastic buffer pad (32) is arranged between the valve seat (3) and the valve seat pressing ring (31), a through adjusting hole is formed in a valve body (1) corresponding to the valve seat pressing ring (31), and an adjusting screw capable of adjusting the horizontal position is screwed in through the adjusting hole.

7. An electric eccentric half ball valve according to claim 1, characterized in that the end face of the packing gland (2) contacting the valve body (1) is provided with a sealing ring (9), the sealing ring (9) being clamped between the support ring and the pressure ring.