Hard sealing eccentric half ball valve

Abstract

The utility model provides a hard sealing eccentric semi-ball valve which comprises a valve body, a ball body is arranged in the valve body, the ball body is rotationally connected to the valve body through a valve rod, the two ends of the valve body are connected with an upstream pipeline and a downstream pipeline respectively, the rotating ball body is used for connecting and disconnecting passages of the upstream pipeline and the downstream pipeline in the valve body, and the ball body is a semi-ball valve clack. The valve seat is detachably installed at one end of the valve body and is of an annular structure, surfacing seal is arranged on the inner edge of one end of the valve seat, the arc-shaped periphery of the semi-spherical valve clack can be connected to the surfacing seal in a sealed mode, and the periphery of the valve seat is connected to the inner ring of the valve body in a sealed mode through a sealing ring. According to the hard sealing eccentric half ball valve, surfacing sealing is hard sealing of the valve seat and the ball body, the sealing performance of the part can be improved, the service life is prolonged, the valve seat is detachably connected to the valve body, maintenance of the part is facilitated, the valve seat is connected to the valve body in a sealed mode through the sealing ring, and the sealing performance of assembly of the part is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of hemispherical valves, in particular to a hard-sealed eccentric hemispherical valve. Background Art

[0002] The eccentric semi-ball valve is a relatively new type of ball valve. It has some advantages unique to its own structure, such as small opening and closing torque. 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 petroleum, chemical industry, urban water supply and drainage and other working conditions that require strict shutoff. The eccentric semi-ball valve of the prior art usually sets a rubber ring for sealing between the valve disc and the valve seat. When the valve is frequently opened and closed, the valve disc or the valve seat will frequently squeeze the rubber ring, and the presence of foreign matter on the valve disc or the valve seat will also cause the rubber ring to be damaged, resulting in insufficient sealing performance. In addition, when the machine is shut down for maintenance, the rubber ring is between the valve disc and the valve seat and is not easy to replace. Utility Model Content

[0003] In view of this, the utility model aims to provide a hard-sealed eccentric hemispherical valve to solve the problem that the rubber seal of the eccentric hemispherical valve in the prior art has a short service life and is inconvenient to replace and clean.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A hard-sealed eccentric hemispherical valve comprises a valve body, a sphere is arranged in the valve body, and the sphere is rotatably connected to the valve body through a valve stem, two ends of the valve body are respectively connected to an upstream pipeline and a downstream pipeline, and the rotating sphere is used to open and close the passages of the upstream pipeline and the downstream pipeline in the valve body, the sphere is a hemispherical valve disc, a valve seat is detachably mounted at one end of the valve body, and the valve seat is an annular structure, a surfacing seal is arranged on the inner edge of one end of the valve seat, the arc-shaped periphery of the hemispherical valve disc can be sealed and connected to the surfacing seal, and the periphery of the valve seat is sealed and connected to the inner ring of the valve body through a sealing ring.

[0006] Furthermore, the valve seat includes a first structural ring, a second structural ring and a third structural ring which are arranged in sequence along the flow direction of the medium, a limit ring is arranged inside the valve body, the periphery of the first structural ring is sealed and connected to the inner ring of the limit ring by a first O-ring, a sealing surfacing is arranged on the inner ring of the first structural ring, the periphery of the second structural ring is sealed and connected to the inner ring of the valve body by a second O-ring, and the second structural ring is located on one side of the first structural ring, the ball is located on the other side of the first structural ring, and the third structural ring is detachably connected to one end of the valve body.

[0007] Furthermore, the first structural ring, the second structural ring and the third structural ring are an integral structure.

[0008] Furthermore, the second structural ring can abut against one end of the limiting ring.

[0009] Furthermore, the upper side wall of the third structural ring is circumferentially provided with a plurality of first through holes, one end of the valve body is circumferentially provided with a plurality of threaded holes, and the fixing bolts are respectively located in a first through hole and a threaded hole, for positioning the relative positions of the third structural ring and the valve body.

[0010] Furthermore, the fixing bolt is a T-shaped structure, one end of the fixing bolt can be snapped into the first through hole, the other end of the fixing bolt passes through the first through hole and is threadedly connected to the threaded hole, and a gasket is arranged in the first through hole, and the gasket is used to adjust the relative position of the end of the fixing bolt in the first through hole.

[0011] Furthermore, the valve stem includes an upper valve stem and a lower valve stem which are coaxially arranged, one end of the sphere is fixedly mounted on the lower valve stem, and the lower valve stem is rotatably sleeved to the inner ring of the valve body through a first bearing, the other end of the sphere is fixedly sleeved to the upper valve stem, the upper valve stem is rotatably sleeved to the side wall of the valve body through a second bearing, and the upper end of the upper valve stem is connected to the actuator.

[0012] Compared with the prior art, the hard-sealed eccentric hemispherical valve described in the utility model has the following beneficial effects:

[0013] (1) The hard-sealed eccentric hemispherical valve described in the utility model has a hard seal between the valve seat and the ball, which can increase the sealing performance of this part and prolong its service life. The valve seat can be detachably connected to the valve body to facilitate maintenance of this part. The valve seat is sealed to the valve body through a sealing ring to ensure the sealing performance of this part.

[0014] (2) The utility model discloses a hard-sealed eccentric hemispherical valve, wherein the hemispherical valve disc is adapted to the arc-shaped structure of the inner cavity of the valve body, and the valve disc can scrape away foreign matter at the corresponding position of the inner wall of the valve body.

[0015] (3) The hard-sealed eccentric hemispherical valve described in the utility model adjusts the depth of the first structural ring protruding into the valve body by adding or adjusting gaskets of different thicknesses, so as to ensure that the cladding seal can be sealed and connected with the ball body, and at the same time adjusts the eccentricity of the valve seat, so as to facilitate the adjustment and maintenance of the sealing performance between the cladding seal and the ball body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 It is a cross-sectional schematic diagram of a hard-sealed eccentric hemispherical valve according to an embodiment of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the valve body according to an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the valve seat described in an embodiment of the utility model.

[0020] Description of reference numerals:

[0021] 1-valve body; 11-limiting ring; 2-ball; 3-upper valve stem; 4-lower valve stem; 5-valve seat; 51-surfacing seal; 52-fixing bolt; 53-first structural ring; 54-second structural ring; 55-third structural ring; 6-first O-ring; 7-second O-ring; 8-first bearing; 9-second bearing; 10-handwheel; 11-bottom cover; 12-packing; 13-pressure plate. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] like Figure 1-Figure 3As shown, a hard-sealed eccentric hemispherical valve comprises a valve body, a ball 2 is arranged in the valve body 1, and the ball 2 is rotatably connected to the valve body 1 through a valve stem, the two ends of the valve body 1 are respectively connected to an upstream pipeline and a downstream pipeline, and the rotating ball 2 is used to open and close the passage of the upstream pipeline and the downstream pipeline in the valve body 1, the ball 2 is a hemispherical valve disc, one end of the valve body 1 can be detachably mounted with a valve seat 5, and the valve seat 5 is an annular structure, an inner edge of one end of the valve seat 5 is provided with a surfacing seal 51, and the arc-shaped periphery of the hemispherical valve disc can be sealed and connected to The cladding seal 51, the periphery of the valve seat 5 is sealed and connected to the inner ring of the valve body 1 through a sealing ring, the hemispherical valve disc is adapted to the arc structure of the inner cavity of the valve body 1, the valve disc can scrape foreign matter from the corresponding position of the inner wall of the valve body 1, the cladding seal 51 is a hard seal between the valve seat 5 and the sphere 2, which can increase the sealing performance of this part and improve the service life, the valve seat 5 can be detachably connected to the valve body 1, which is convenient for maintenance of this part, the valve seat 5 is sealed and connected to the valve body 1 through a sealing ring, ensuring the sealing performance of this part of the assembly.

[0027] The valve seat 5 includes a first structural ring 53, a second structural ring 54 and a third structural ring 55 arranged in sequence along the flow direction of the medium. A limit ring 11 is arranged inside the valve body 1. The periphery of the first structural ring 53 is sealed and connected to the inner ring of the limit ring 11 through a first O-ring 6. The inner ring of the first structural ring 53 is provided with a sealing surfacing. The periphery of the second structural ring 54 is sealed and connected to the inner ring of the valve body 1 through a second O-ring 7. The second structural ring 54 is located on one side of the first structural ring 53, and the ball 2 is located on the other side of the first structural ring 53. The third structural ring 55 is detachably connected to one end of the valve body 1. In order to facilitate The installation of the first structure ring 53, the second structure ring 54 and the third structure ring 55. In this embodiment, the first structure ring 53, the second structure ring 54 and the third structure ring 55 are an integrated structure. During installation, the second structure ring 54 can abut against one end of the limit ring 11, and when the second structure ring 54 abuts against the limit ring 11, it means that the second structure ring 54 and the first structure ring 53 have penetrated into the interior of the valve body 1 to the maximum extent, that is, the limit ring 11 is the limiting structure of the first structure ring 53 and the second structure ring 54, which prevents the second structure ring 54 from penetrating too deep and interfering with the opening and closing of the ball 2.

[0028] A plurality of first through holes are circumferentially provided on the upper side wall of the third structural ring 55, and a plurality of threaded holes are circumferentially provided at one end of the valve body 1. The fixing bolt 52 is respectively located in a first through hole and a threaded hole, and is used to locate the relative position of the third structural ring 55 and the valve body 1. The fixing bolt 52 is a T-shaped structure, and one end of the fixing bolt 52 can be snapped into the first through hole, and the other end of the fixing bolt 52 is threadedly connected to the threaded hole after passing through the first through hole, and a gasket is arranged in the first through hole, and the gasket is used to adjust the relative position of the end of the fixing bolt 52 in the first through hole. By adding or adjusting gaskets of different thicknesses, the depth of the first structural ring 53 penetrating into the interior of the valve body 1 can be adjusted to ensure that the surfacing seal 51 can be sealed and connected to the ball 2. At the same time, the eccentricity of the valve seat 5 is adjusted to facilitate the adjustment and maintenance of the sealing performance between the surfacing seal 51 and the ball 2.

[0029] The valve stem includes an upper valve stem 3 and a lower valve stem 4 which are coaxially arranged. The lower valve stem 4 is fixedly mounted on one end of the ball body 2, and the lower valve stem 4 is rotatably sleeved to the inner ring of the valve body 1 through a first bearing 8. The other end of the ball body 2 is fixedly sleeved to the upper valve stem 3, and the upper valve stem 3 is rotatably sleeved to the side wall of the valve body 1 through a second bearing 9, and the upper end of the upper valve stem 3 is connected to the actuator, such as Figure 1 As shown, in order to facilitate the installation of the lower valve stem 4, a hole for installing the lower valve stem 4 is opened on the valve body 1, and the lower valve stem 4 is sealed into the hole through the second bearing 9, and the bottom of the lower valve stem 4 is sealed with the valve body 1 through the bottom cover 11. The upper valve stem 3 needs to protrude from the valve body 1 to connect with the actuator, so a packing 12 is arranged between the upper valve stem 3 and the valve body 1, and the relative position of the packing 12 is fixed by a pressure plate 13, and the actuator of this embodiment is a hand wheel 10.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hard-sealed eccentric hemispherical valve, comprising a valve body (1), a ball (2) disposed inside the valve body (1), and the ball (2) rotatably connected to the valve body (1) via a valve stem, the two ends of the valve body (1) being respectively connected to an upstream pipeline and a downstream pipeline, and the rotating ball (2) being used to open and close passages of the upstream pipeline and the downstream pipeline in the valve body (1), characterized in that: The ball (2) is a hemispherical valve disc, and a valve seat (5) is detachably mounted on one end of the valve body (1), and the valve seat (5) is an annular structure. A welded seal (51) is arranged on the inner edge of one end of the valve seat (5), and the arc-shaped periphery of the hemispherical valve disc can be sealed to the welded seal (51), and the periphery of the valve seat (5) is sealed to the inner ring of the valve body (1) via a sealing ring.

2. A hard-sealed eccentric hemispherical valve according to claim 1, characterized in that: The valve seat (5) comprises a first structural ring (53), a second structural ring (54) and a third structural ring (55) which are arranged in sequence along the flow direction of the medium; a limit ring (11) is arranged inside the valve body (1); the periphery of the first structural ring (53) is sealedly connected to the inner ring of the limit ring (11) via a first O-ring (6); a sealing overlay is arranged on the inner ring of the first structural ring (53); the periphery of the second structural ring (54) is sealedly connected to the inner ring of the valve body (1) via a second O-ring (7); the second structural ring (54) is located on one side of the first structural ring (53); the ball (2) is located on the other side of the first structural ring (53); and the third structural ring (55) is detachably connected to one end of the valve body (1).

3. A hard-sealed eccentric hemispherical valve according to claim 2, characterized in that: The first structural ring (53), the second structural ring (54) and the third structural ring (55) are an integral structure.

4. A hard-sealed eccentric hemispherical valve according to claim 2, characterized in that: The second structural ring (54) can abut against one end of the limiting ring (11).

5. The hard-sealed eccentric hemispherical valve according to claim 2, characterized in that: The upper side wall of the third structural ring (55) is provided with a plurality of first through holes along the circumferential direction, one end of the valve body (1) is provided with a plurality of threaded holes along the circumferential direction, and the fixing bolts (52) are respectively located in a first through hole and a threaded hole, and are used to locate the relative positions of the third structural ring (55) and the valve body (1).

6. A hard-sealed eccentric hemispherical valve according to claim 5, characterized in that: The fixing bolt (52) is a T-shaped structure, one end of the fixing bolt (52) can be snapped into the first through hole, the other end of the fixing bolt (52) passes through the first through hole and is threadedly connected to the threaded hole, and a gasket is arranged in the first through hole, and the gasket is used to adjust the relative position of the end of the fixing bolt (52) in the first through hole.

7. The hard-sealed eccentric hemispherical valve according to claim 1, characterized in that: The valve stem comprises an upper valve stem (3) and a lower valve stem (4) which are coaxially arranged, one end of the ball (2) is fixedly mounted with the lower valve stem (4), and the lower valve stem (4) is rotatably sleeved to the inner ring of the valve body (1) via a first bearing (8), the other end of the ball (2) is fixedly sleeved to the upper valve stem (3), the upper valve stem (3) is rotatably sleeved to the side wall of the valve body (1) via a second bearing (9), and the upper end of the upper valve stem (3) is connected to an actuator.

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