Full-bore horizontal flat-bottom eccentric semi-ball valve

Abstract

The utility model discloses a full-bore horizontal flat-bottom eccentric semi-ball valve which is characterized in that a semi-ball valve clack is movably arranged in a valve body and divides the valve body into an inlet flow channel and an outlet flow channel, the inner end of a valve rod is in transmission connection with the semi-ball valve clack, and the outer end of the valve rod extends out of the valve body; the outer end of the valve rod is in transmission connection with a driving device arranged outside the valve body, a valve cover is arranged on the valve body, the end, away from the valve rod, of the hemispherical valve clack is rotationally connected with the valve body through a valve shaft, and a stabilizing device and a sealing device are arranged on the valve shaft. The stabilizing device comprises a valve shaft main body, an outer cover covering the valve body and an inner cover arranged in the valve body, through the arrangement, a shaft hole is formed in the position, corresponding to the connecting position of the semi-ball valve clack, of the valve body, and the semi-ball valve clack and the valve shaft are installed through the stabilizing device with the anti-bending function; good structural rigidity can be kept when the semi-ball valve clack receives longitudinal pressure of a medium, the overall stability performance is improved, and the overall sealing performance of the valve is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a full-diameter horizontal flat-bottom eccentric hemispherical valve. Background Art

[0002] The eccentric hemispherical valve is a relatively new type of ball valve. It has some advantages unique to its structure, such as no friction when opening and closing, the seal is not easy to wear, and the opening and closing torque is small. This can reduce the specifications of the actuator. Equipped with a multi-turn electric actuator, it can achieve the adjustment and strict shutoff of the medium. It is widely used in working conditions that require strict shutoff, such as petroleum, chemical industry, and urban water supply and drainage. The eccentric hemispherical valve mainly relies on the offset of the central axis to achieve the seal between the hemispherical valve disc and the valve seat, so its valve stem needs to have good structural rigidity.

[0003] In the prior art, a full-diameter horizontal flat-bottom eccentric hemispherical valve is designed, which is usually used in liquid transfer pipelines such as tap water transportation. The pressure of the medium on the hemispherical valve disc is directly borne by the valve stem that fixes the hemispherical valve disc. Therefore, the valve stem is often subjected to a large force and is prone to bending, deformation, or even breakage, thereby affecting the sealing performance between the hemispherical valve plate and the valve seat. Therefore, there is room for improvement. Summary of the invention

[0004] In view of the above problems, the present application proposes a full-diameter horizontal flat-bottom eccentric hemispherical valve, by providing an axial hole on the valve body corresponding to the connecting part of the hemispherical valve disc, and installing the hemispherical valve disc and the valve shaft through a stabilizing device with an anti-bending function, so that the hemispherical valve disc can maintain good structural rigidity when receiving the longitudinal pressure of the medium, improve the overall stability performance, and ensure the overall sealing performance of the valve; the full-diameter horizontal flat-bottom eccentric hemispherical valve is specifically implemented by the following technical solutions:

[0005] A full-diameter horizontal flat-bottom eccentric hemispherical valve, comprising: a valve body, a valve stem and a hemispherical valve disc, wherein a flow channel for medium circulation is arranged in the valve body, the hemispherical valve disc is movably arranged inside the valve body and separates the valve body into an inlet flow channel and an outlet flow channel, the inner end of the valve stem is transmission-connected to the hemispherical valve disc, the outer end of the valve stem extends out of the valve body, and the outer end of the valve stem is transmission-connected to a driving device arranged outside the valve body, a valve cover is arranged on the valve body, an end of the hemispherical valve disc away from the valve stem is rotationally connected to the valve body by a valve shaft, a stabilizing device and a sealing device are arranged on the valve shaft, the stabilizing device comprises a valve shaft body, an outer cover arranged outside the valve body and an inner cover arranged in the valve body, and the sealing device comprises a sealing ring, a first sealing gasket and a second sealing gasket.

[0006] It is further configured that the valve body is provided with a first axial hole corresponding to the valve shaft setting position, and the hemispherical valve flap is provided with a second axial hole corresponding to the first axial hole position, the valve shaft passes through the first axial hole and extends into the interior of the valve body and passes through the second axial hole again to be connected with the hemispherical valve flap. Through this configuration, the hemispherical valve flap is connected to the valve body in an interlaced manner and is convenient to rotate, thereby realizing the basic opening and closing function of the hemispherical valve flap.

[0007] It is further configured that the outer cover is arranged at a position corresponding to the first axial hole, and the outer cover is connected to the valve body and the valve shaft at the same time through fasteners, and the inner cover is arranged at a position corresponding to the second axial hole, and the second axial hole is fastened to the hemispherical valve disc through fasteners. Through this configuration, the whole is made more stable.

[0008] It is further configured that a limiting protrusion is provided on the inner wall of the outer cover, and a limiting groove is provided on the valve shaft corresponding to the position of the limiting protrusion. When the outer cover is tightly connected to the valve shaft, the limiting protrusion is clamped in the limiting groove. Through this configuration, the installation of the outer cover is facilitated, loosening is effectively prevented, and the overall structure is more stable.

[0009] It is further configured that the surface of the valve shaft is provided with an annular limiting groove coaxial with the first shaft hole and the second shaft hole, and a sealing ring is provided in the annular limiting groove. Through this configuration, the sealing performance between the valve shaft and the valve body is enhanced.

[0010] It is further arranged that a first sealing gasket is arranged at the position where the hemispherical valve flap and the valve body meet. Through this arrangement, the sealing performance between the hemispherical valve flap and the valve body is enhanced.

[0011] It is further arranged that a second sealing gasket is arranged between the inner cover and the hemispherical valve disc. Through this arrangement, the sealing performance between the inner cover and the hemispherical valve disc is enhanced.

[0012] It is further configured that a rotating bearing is provided on the inner wall of the second axial hole, the inner wall of the rotating bearing is tightly pressed against the valve shaft, and the outer wall of the rotating bearing is tightly pressed against the inner wall of the second axial hole on the hemispherical valve flap. Through this configuration, friction is reduced and the hemispherical valve flap can be opened and closed more conveniently.

[0013] It is further arranged that the extension direction of the valve shaft is the same as and coaxial with the extension direction of the valve stem. Through this arrangement, the whole is more stable.

[0014] In summary, the full-diameter horizontal flat-bottom eccentric hemispherical valve is configured with an axial hole on the valve body corresponding to the connecting portion of the hemispherical valve disc, and the hemispherical valve disc and the valve shaft are installed by a stabilizing device with an anti-bending function, so that the hemispherical valve disc can maintain good structural rigidity when receiving the longitudinal pressure of the medium, thereby improving the overall stability and ensuring the overall sealing performance of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A cross-sectional view of a full-diameter horizontal flat-bottom eccentric hemispherical valve provided in an embodiment of the present application Figure 1 ;

[0017] Figure 2 A cross-sectional view of a full-diameter horizontal flat-bottom eccentric hemispherical valve provided in an embodiment of the present application Figure 2 ;

[0018] Figure 3 The full-diameter horizontal flat-bottom eccentric hemispherical valve provided in the embodiment of the present application Figure 1 Enlarged view of part A in the middle.

[0019] Among them, the reference numerals in the figure are:

[0020] 1. Valve body; 2. Valve stem; 3. Hemispherical valve disc; 4. Flow channel; 5. Inlet flow channel; 6. Outlet flow channel; 7. Driving device; 8. Valve cover; 9. Valve shaft; 10. Stabilizing device; 11. Sealing device; 12. Outer cover; 13. Inner cover; 14. Sealing ring; 15. First sealing gasket; 16. Second sealing gasket; 17. First axial hole; 18. Second axial hole; 19. Limiting protrusion; 20. Limiting groove; 21. Annular limiting groove; 22. Rotating bearing. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] The present application is now further described with reference to the accompanying drawings and specific implementation methods:

[0024] Please also read Figures 1 to 3 , a full-diameter horizontal flat-bottom eccentric hemispherical valve, comprising: a valve body, a valve stem and a hemispherical valve disc, the valve body is provided with a flow channel for medium circulation, the hemispherical valve disc is movably arranged inside the valve body and divides the valve body into an inlet flow channel and an outlet flow channel, the inner end of the valve stem is transmission connected with the hemispherical valve disc, the outer end of the valve stem extends out of the valve body, and the outer end of the valve stem is transmission connected with a driving device arranged outside the valve body, the valve body is provided with a valve cover, the end of the hemispherical valve disc away from the valve stem is rotatably connected to the valve body by a valve shaft, the valve shaft is provided with a stabilizing device and a sealing device, the stabilizing device comprises a valve shaft main body, an outer cover arranged outside the valve body and an inner cover arranged inside the valve body, the sealing device comprises a sealing ring, a first sealing gasket and a second sealing gasket.

[0025] See also Figures 1 to 3In this embodiment, the valve body is provided with a first axial hole corresponding to the valve shaft setting position, and the hemispherical valve disc is provided with a second axial hole corresponding to the first axial hole position. The valve shaft penetrates the first axial hole and extends into the interior of the valve body and penetrates the second axial hole again to be connected with the hemispherical valve disc. In this way, the hemispherical valve disc is connected to the valve body in a manner similar to a latch, and the axis of the valve shaft and the axis of the valve stem are on the same extension line, ensuring that when the valve stem is rotated, the hemispherical valve disc can be coaxially driven to rotate along the axis of the valve shaft to achieve the basic function of opening and closing the valve. The outer cover is arranged at a position corresponding to the first shaft hole, and the outer cover is connected to the valve body and the valve shaft at the same time through fasteners, the inner cover is arranged at a position corresponding to the second shaft hole, and the second shaft hole is fastened to the hemispherical valve disc through fasteners. In this way, after the shaft hole is inserted into the valve shaft, the front and rear ends are sealed by the outer cover and the inner cover respectively, so as to prevent leakage caused by the decline of the sealing performance of the valve, and the opening of the shaft hole facilitates the removal of the hemispherical valve disc inside the valve during later maintenance; the inner wall of the outer cover is provided with a limiting protrusion, and the valve shaft corresponds to the A limiting groove is provided at the position of the limiting protrusion, and when the outer cover is tightly connected to the valve shaft, the limiting protrusion is clamped in the limiting groove; the surface of the valve shaft is provided with an annular limiting groove coaxial with the first shaft hole and the second shaft hole, and a sealing ring is provided in the annular limiting groove; a first sealing gasket is provided at the junction of the hemispherical valve disc and the valve body; a second sealing gasket is provided between the inner cover and the hemispherical valve disc; a rotating bearing is provided on the inner wall of the second shaft hole, the inner wall of the rotating bearing is tightly against the valve shaft, and the outer wall of the rotating bearing is in contact with the first sealing gasket on the hemispherical valve disc The inner walls of the two shaft holes are tightly against each other; a rotating bearing is arranged on the inner wall of the second shaft hole, and the inner wall of the rotating bearing is tightly against the valve shaft, and the outer wall of the rotating bearing is tightly against the inner wall of the second shaft hole on the hemispherical valve disc. The setting of the rotating bearing requires consideration of the erosion of the medium, so a material that will not be eroded by the medium is used, and the reaction between different media and different materials needs to be considered. In order to ensure good sealing performance, the hemispherical valve disc and the valve shaft are closely matched, but the setting of the rotating bearing can greatly reduce the friction between the valve shaft and the upper end of the hemispherical valve disc, thereby saving effort.

[0026] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A full-diameter horizontal flat-bottom eccentric hemispherical valve, comprising: A valve body, a valve stem and a hemispherical valve disc, wherein a flow channel for medium circulation is arranged in the valve body, the hemispherical valve disc is movably arranged inside the valve body and divides the valve body into an inlet flow channel and an outlet flow channel, the inner end of the valve stem is transmission-connected with the hemispherical valve disc, the outer end of the valve stem extends out of the valve body, and the outer end of the valve stem is transmission-connected with a driving device arranged outside the valve body, and a valve cover is arranged on the valve body, characterized in that: an end of the hemispherical valve disc away from the valve stem is rotationally connected with the valve body through a valve shaft, a stabilizing device and a sealing device are arranged on the valve shaft, the stabilizing device comprises a main body of the valve shaft, an outer cover arranged outside the valve body and an inner cover arranged inside the valve body, the sealing device comprises a sealing ring, a first sealing gasket and a second sealing gasket; the valve body is provided with a first axial hole corresponding to the setting position of the valve shaft, the hemispherical valve disc is provided with a second axial hole corresponding to the position of the first axial hole, the valve shaft penetrates the first axial hole and extends into the interior of the valve body and penetrates the second axial hole again to be connected with the hemispherical valve disc.

2. A full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that : The outer cover is arranged at a position corresponding to the first axial hole, and the outer cover is connected to the valve body and the valve shaft at the same time through fasteners; the inner cover is arranged at a position corresponding to the second axial hole, and the second axial hole is fastened to the hemispherical valve disc through fasteners.

3. A full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that A limiting protrusion is arranged on the inner wall of the outer cover, and a limiting groove is arranged on the valve shaft corresponding to the position of the limiting protrusion. When the outer cover is tightly connected to the valve shaft, the limiting protrusion is clamped in the limiting groove.

4. A full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that The surface of the valve shaft is provided with an annular limiting groove coaxial with the first shaft hole and the second shaft hole, and a sealing ring is provided in the annular limiting groove.

5. The full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that A first sealing gasket is provided at the junction of the hemispherical valve disc and the valve body.

6. A full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that A second sealing gasket is provided between the inner cover and the hemispherical valve disc.

7. A full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that A rotating bearing is arranged on the inner wall of the second shaft hole, the inner wall of the rotating bearing is pressed tightly against the valve shaft, and the outer wall of the rotating bearing is pressed tightly against the inner wall of the second shaft hole on the hemispherical valve disc.

8. The full-diameter horizontal flat-bottom eccentric hemispherical valve according to claim 1, characterized in that :The extension direction of the valve shaft is the same as and coaxial with the extension direction of the valve stem.

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