Ball valve

Abstract

The utility model discloses a ball valve which comprises a valve body, a ball body, a valve rod and a sealing ring. A cavity is formed in the valve body, the top end of the cavity communicates with a receding groove, and a sealing groove is formed in the receding groove. The ball body is rotationally arranged in the cavity in a sleeving manner; one end of the valve rod is connected with the top end of the ball body, the other end of the valve rod extends into the receding groove and extends out of the valve body, and at least two limiting grooves are formed in the outer wall of the valve rod; the sealing ring is correspondingly embedded in the limiting groove and generates extrusion deformation in the sealing groove along with rotation of the valve rod. According to the utility model, the sealing groove, the limiting groove and the sealing ring are arranged to form a sealing structure; and the sealing ring is further embedded in the limiting groove, so that when the valve rod rotates, the sealing ring is extruded more sufficiently and deforms, and the sealing effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a ball valve. Background Art

[0002] A ball valve is a one-way valve widely used in the petroleum, chemical, papermaking, and other industries. It primarily consists of a valve body, ball, valve seat, valve stem, bracket, and drive mechanism. Utility model patent number CN221300173U discloses a full-bore ball valve with excellent sealing performance. This valve utilizes a sealing ring and a sealing assembly crimped onto the top of the ring to create a secondary seal, enhancing the sealing effect. In particular, the shaft seal is sleeved onto the top of the rotating shaft, providing a secondary seal for the rotating shaft and reducing friction between the shaft and the sealing assembly. This improves sealing performance and extends the life of the ball valve.

[0003] However, during long-term use, the full-bore ball valve with good sealing performance is less subject to extrusion deformation due to the sealing ring being sleeved in the groove, that is, the primary sealing effect corresponding to the sealing ring is weak; furthermore, the sealing component is partially located outside, and there is a possibility of sealing failure during long-term use, that is, the overall sealing effect of the above-mentioned sealing structure is relatively limited. Utility Model Content

[0004] The purpose of the present invention is to overcome the above technical deficiencies and to provide a ball valve to solve the technical problem in the prior art of limited overall sealing effect due to aging and small extrusion deformation.

[0005] In order to achieve the above technical purpose, the present invention adopts the following technical solutions:

[0006] The utility model provides a ball valve, comprising a valve body, a sphere, a valve stem and a sealing ring; a cavity is provided in the valve body, the top end of the cavity is connected to a give way groove, and a sealing groove is provided in the give way groove; the sphere is rotatably sleeved in the cavity; one end of the valve stem is connected to the top end of the sphere, and the other end of the valve stem extends into the give way groove and out of the valve body, and the outer wall of the valve stem is provided with at least two limiting grooves; the sealing ring is correspondingly embedded in the limiting groove, and generates extrusion deformation in the sealing groove as the valve stem rotates.

[0007] In some embodiments, a guide angle is provided on the bottom edge of the sealing ring.

[0008] In some embodiments, the height dimension of the sealing ring is equal to the height dimension of the sealing groove.

[0009] In some embodiments, the sealing ring is an O-ring.

[0010] In some embodiments, the bottom end of the clearance groove is tapered, and the narrow end is close to one side of the sphere.

[0011] In some embodiments, the sphere is a floating sphere, and a medium channel is opened on the outer wall of the sphere.

[0012] In some embodiments, the sphere is a full-bore sphere.

[0013] In some embodiments, an external connection hole is provided on one side of the valve body, and the external connection hole is used to connect accessories.

[0014] In some embodiments, the other end of the valve stem is connected to a handle.

[0015] In some embodiments, the handle is crank-shaped.

[0016] Compared with the prior art, the utility model provides a ball valve, which constructs a sealing structure by arranging a sealing groove, a limiting groove and a sealing ring; specifically, the sealing ring is embedded in the limiting groove and produces extrusion deformation in the sealing groove as the valve stem rotates, so that the sealing ring and the sealing groove have a closer surface contact, thereby enhancing the sealing effect; further, since the sealing ring is arranged between the sealing groove and the limiting groove, the internal sealing effect is better than the external unilateral sealing effect, and is not easy to age and reduce the sealing performance, thereby improving the overall sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a ball valve provided by an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 Right view;

[0019] Figure 3 yes Figure 2 Cross-sectional view of AA;

[0020] Figure 4 yes Figure 3 A magnified schematic diagram of point A in the middle;

[0021] Figure 5 yes Figure 3 The enlarged diagram of point A in the middle (when the sealing ring is squeezed);

[0022] Figure 6 yes Figure 5 A schematic diagram of the enlarged structure of the middle sealing ring;

[0023] Figure 7 yes Figure 1 Cross-sectional view of the internal structure of the middle valve body;

[0024] Description of reference numerals:

[0025] 100, valve body; 110, cavity; 120, give way groove; 130, sealing groove; 140, external hole; 200, sphere; 210, medium channel; 300, valve stem; 310, limit groove; 400, sealing ring; 410, guide angle; 500, handle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] In order to solve the technical problem that the overall sealing effect is limited due to aging and small extrusion deformation, the utility model provides a ball valve that can improve the overall sealing effect.

[0028] It should be noted that the ball valve described in the present invention is used for but not limited to petroleum equipment, etc. For the sake of convenience, in the present invention, only a ball valve applied to petroleum equipment is used as an example for explanation. The principle of applying a ball valve to other types of equipment is essentially the same as that applied to petroleum equipment, and will not be described in detail here.

[0029] See also Figure 1 - Figure 7 ,in Figure 1 This is a structural schematic diagram of a ball valve in an embodiment of the present invention, which includes a valve body 100, a ball 200, a valve stem 300 and a sealing ring 400; a cavity 110 is provided in the valve body 100, and the top of the cavity 110 is connected to a makeshift groove 120, and a sealing groove 130 is provided in the makeshift groove 120; the ball 200 is rotatably sleeved in the cavity 110; one end of the valve stem 300 is connected to the top of the ball 200, and the other end of the valve stem 300 extends into the makeshift groove 120 and out of the valve body 100, and the outer wall of the valve stem 300 is provided with at least two limit grooves 310; the sealing ring 400 is correspondingly embedded in the limit groove 310, and is extruded and deformed in the sealing groove 130 as the valve stem 300 rotates.

[0030] In this embodiment, a sealing structure is constructed by arranging a sealing ring 400, a sealing groove 130 and a limiting groove 310; specifically, the sealing ring 400 is embedded in the limiting groove 310, and extrusion deformation is generated in the sealing groove 130 as the valve stem 300 rotates, thereby increasing the extrusion deformation between the sealing ring 400 and the sealing groove 130, and effectively improving the sealing effect of the sealing ring 400; in particular, at least two limiting grooves 310 are provided, which constructs a double sealing structure, which can effectively improve the sealing effect of the upper inner part of the valve body 100; in addition, since the sealing ring 400 is provided between the sealing groove 130 and the limiting groove 310, the internal sealing effect is better than the external unilateral sealing effect, and is not easy to age and reduce the sealing performance, that is, the overall sealing effect is improved.

[0031] In one embodiment, see Figure 4 、 Figure 6 The bottom edge of the sealing ring 400 is provided with a guide angle 410 .

[0032] In this embodiment, the design of the guide angle 410 allows the sealing ring 400 to enter the clearance groove 120 more smoothly during the installation process, and finally fall into the sealing groove 130 to form a sealing relationship.

[0033] In one embodiment, see Figure 4 , the height dimension of the sealing ring 400 is equal to the height dimension of the sealing groove 130 .

[0034] In this embodiment, the height of the sealing ring 400 is equal to the height of the sealing groove 130 , which can ensure more complete surface contact between the sealing ring 400 and the sealing groove 130 , thereby improving the sealing effect.

[0035] In one embodiment, see Figure 6 , the sealing ring 400 is an O-type sealing ring.

[0036] In this embodiment, the sealing ring 400 is an O-ring, which has a simpler and more durable structure.

[0037] In one embodiment, see Figure 3 、 Figure 7 The bottom end of the clearance groove 120 is tapered, and the narrow end is close to one side of the sphere 200.

[0038] In this embodiment, the bottom end of the clearance groove 120 is tapered, which can help the valve stem 300 to have more extrusion contact with the inner wall of the clearance groove 120 through the taper.

[0039] In one embodiment, see Figure 3 The sphere 200 is a floating sphere, and a medium channel 210 is opened on the outer wall of the sphere 200.

[0040] In this embodiment, the medium channel 210 opens and closes the ball valve as the ball 200 rotates. The ball 200 is a floating ball, which can increase its service life.

[0041] In one embodiment, see Figure 3 , the sphere 200 is a full-diameter sphere.

[0042] In this embodiment, the sphere 200 is a full-diameter sphere that can increase the flow rate per unit time.

[0043] In one embodiment, see Figure 1 An external connection hole 140 is provided on one side of the valve body 100, and the external connection hole 140 is used to connect accessories.

[0044] In this embodiment, the external connection hole 140 can be used to connect accessories such as an external pressure gauge to achieve functional expansion. The external connection hole 140 needs to be sealed with a plug when not in use, or can be removed according to actual needs.

[0045] In one embodiment, see Figure 1 The other end of the valve stem 300 is connected to a handle 500 .

[0046] In one embodiment, see Figure 1 , the handle 500 is crank-shaped.

[0047] In this embodiment, the handle 500 is crank-shaped and can be used conveniently by the operator.

[0048] In order to better understand the present invention, the following Figures 1 to 7 The technical solution of the utility model is described in detail:

[0049] First, turn the handle 500 and drive the valve stem 300 to rotate. At this time, the medium channel 210 rotates accordingly and opens and closes the interior of the ball valve and can be used normally. During the process of turning the handle 500, the valve stem 300 moves either upward or downward. During the above movement, the end face of the sealing ring 400 is squeezed toward the side of the sealing groove 130 by the limiting groove 310, resulting in a more complete extrusion deformation, thereby making the surface contact between the sealing ring 400 and the sealing groove 130 closer, enhancing the sealing effect. Furthermore, because the sealing rings 400 are arranged in pairs in the clearance groove 120 and are subjected to internal extrusion, they have a longer service life and a tighter sealing effect than the unidirectional extrusion of a single sealing ring, that is, the overall sealing effect is effectively improved.

[0050] The above specific embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A ball valve, characterized in that: include: A valve body, wherein a cavity is provided in the valve body, a top end of the cavity is connected to a clearance groove, and a sealing groove is provided in the clearance groove; a sphere, the sphere being rotatably sleeved in the cavity; a valve stem, one end of which is connected to the top of the sphere, the other end of which extends into the clearance groove and out of the valve body, and an outer wall of the valve stem is provided with at least two limiting grooves; and The sealing ring is correspondingly embedded in the limiting groove and generates extrusion deformation in the sealing groove as the valve stem rotates.

2. A ball valve according to claim 1, characterized in that: The bottom edge of the sealing ring is provided with a guide angle.

3. A ball valve according to claim 1, characterized in that: The height dimension of the sealing ring is equal to the height dimension of the sealing groove.

4. A ball valve according to claim 1, characterized in that: The sealing ring is an O-type sealing ring.

5. A ball valve according to claim 1, characterized in that: The bottom end of the clearance groove is provided with a taper, and the narrow end is close to one side of the sphere.

6. A ball valve according to claim 1, characterized in that: The sphere is a floating sphere, and a medium channel is opened on the outer wall of the sphere.

7. A ball valve according to claim 1, characterized in that: The sphere is a full-diameter sphere.

8. A ball valve according to claim 1, characterized in that: An external connection hole is provided on one side of the valve body, and the external connection hole is used to connect accessories.

9. The ball valve according to claim 1, characterized in that: The other end of the valve stem is connected with a handle.

10. A ball valve according to claim 9, characterized in that: The handle is crank-shaped.

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