Three-way reversing ball valve

Abstract

The invention provides a three-way reversing ball valve which comprises a valve body, a ball body, a seat ring, an upper valve cover and a valve rod, wedge surfaces are machined on the front side face, the rear side face and the right side face of the ball body, included angles alpha are formed between the wedge surfaces and the vertical central axis, and gaps are reserved between the center lines of channels I, II and III and the center line of the spherical surfaces. The face, abutting against the sealing ring assembly, of the seat ring and the vertical central axis form an included angle alpha. Installation is more convenient through the inclined wedge face with the included angle alpha formed between the ball body and the seat ring, the distance is reserved between the center lines of the channels I, II and III and the center line of the spherical face, the size of the outer circle of the ball body is more compact, cost is reduced, and sealing is more reliable through the arranged sealing assembly.

Description

Technical Field

[0001] This invention patent relates to the field of ball valve technology, specifically a three-way reversing ball valve. Background Technology

[0002] Three-way ball valves are mainly used for diverting or merging fluids in pipelines. They are used to cut off, distribute, and change the flow direction of media in pipelines. Their main function is to connect or close different pipelines by changing the direction of the flow channel orifice in the ball. Because a single valve can change the flow direction of media in different pipelines, they are widely used in various industries. Existing three-way ball valves are mainly divided into T-type and L-type three-way valves based on their ball structure. Both T-type and L-type three-way ball valves suffer from inconvenient installation, high cost, and unreliable sealing. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a three-way reversing ball valve, comprising a valve body, a ball, and a seat ring. The front, rear, and right sides of the ball are each machined with a wedge-shaped surface forming an angle α with the vertical central axis. The front and rear wedge-shaped surfaces have through channels I and II, and the right wedge-shaped surface has a channel III connecting to the front and rear channels I and II. A gap is left between the center lines of channels I, II, and III and the center line of the ball. A flat surface is machined on the lower part of the ball, with a channel IV communicating with channels I, II, and III. Sealing ring assemblies are provided on the left and right sides of the valve body. The surface of the seat ring that abuts against the sealing ring assembly forms an angle α with the vertical central axis. A groove for installing an O-ring is provided at the channel mating point between the seat ring and the valve body. The cylindrical surface at the tail of the seat ring is machined with a lead angle for easy installation. A groove is provided on the end face of the tail of the seat ring, abutting against the boss of a positioning block. The positioning block is fixedly connected to the valve body. The valve body is a one-piece design, and the valve body is butt-welded to the pipeline.

[0004] Preferably, the sealing ring assembly includes a main sealing ring, an inner sealing ring, and an outer sealing ring. Positioning steps are machined on the inner and outer sides of the main sealing ring near the seat ring, and the inner and outer positioning steps cooperate with the inner and outer sealing rings.

[0005] Preferably, the inner and outer sealing rings are rigid metal bodies.

[0006] Preferably, the spherical openings of channels I, II, III, and IV are machined with rounded corners that intersect with the spherical surface, so that the rounded corners are tangent to the spherical surface.

[0007] Preferably, the groove is two symmetrical grooves. Beneficial effects

[0008] The installation is made easier by the wedge-shaped surface with an angle of α between the sphere and the seat ring. The gap between the center lines of channels I, II, and III and the center line of the sphere makes the outer diameter of the sphere more compact, reducing costs. The sealing components make the seal more reliable. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 2 This is a schematic diagram of the sealing ring assembly structure; Figure 3 Schematic diagram of the main sealing ring structure; Figure 4 This is a schematic diagram of a sphere structure; Figure 5 for Figure 4 Cross-sectional view of AA in the middle; Figure 6 This is a schematic diagram of the seat ring structure; Figure 7 This is a cross-sectional view of the seat ring.

[0010] In the diagram: 1. Ball; 2. Valve body; 3. Seat ring; 4. Positioning block; 5. O-ring; 6. Sealing ring assembly; 601. Main sealing ring; 602. Inner sealing ring; 603. Outer sealing ring; 7. Center line of the spherical surface; 8. Center line of channel III; 9. Wedge surface; 10. Center lines of channels I and II; 11. Groove; 12. Recess. Detailed Implementation

[0011] The technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0012] See Figure 1-7 A three-way reversing ball valve includes a valve body, a ball, and a seat ring. The front, rear, and right sides of the ball are each machined with a wedge-shaped surface forming an angle α with the vertical central axis. The front and rear wedge-shaped surfaces have through-passage channels I and II, and the right wedge-shaped surface has a channel III connecting to the front and rear channels I and II. A gap is left between the center lines of channels I, II, and III and the center line of the ball surface. A flat plane is machined on the lower part of the ball, and a channel IV communicating with channels I, II, and III is provided on this plane. The ball openings of channels I, II, III, and IV are machined with rounded corners intersecting the ball surface, ensuring the rounded corners are tangent to the ball surface. The valve body is a one-piece design, and the valve body is butt-welded to the pipeline, which avoids leakage of the medium from the gasket caused by flange connections.

[0013] The valve body has sealing ring assemblies on both sides. These assemblies include a main sealing ring, an inner sealing ring, and an outer sealing ring. Positioning steps are machined on the inner and outer sides of the main sealing ring near the seat ring. These positioning steps mate with the inner and outer sealing rings, which are rigid metal bodies that provide excellent support for the main sealing ring. The surface of the seat ring that abuts against the sealing ring assembly forms an angle α with the vertical central axis. A groove for installing an O-ring is provided at the mating point between the seat ring and the valve body channel. The cylindrical surface at the tail of the seat ring is machined with a lead angle for easy installation. Two symmetrical grooves are located on the tail end face of the seat ring. These grooves abut against the boss of the positioning block, which is fixedly connected to the valve body, ensuring that the seat ring does not rotate circumferentially.

[0014] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A three-way reversing ball valve, comprising a valve body, a ball, and a seat ring, characterized in that, The front, rear, and right sides of the sphere are each machined with a wedge-shaped surface forming an angle α with the vertical central axis. The front and rear wedge-shaped surfaces have through channels I and II, and the right wedge-shaped surface has a channel III that connects to the front and rear channels I and II. A gap is left between the center lines of channels I, II, and III and the center line of the sphere. A plane is machined on the lower part of the sphere, and a channel IV that connects to channels I, II, and III is provided on the plane. Sealing ring assemblies are provided on the left and right sides of the valve body. The surface of the seat ring that abuts against the sealing ring assembly forms an angle α with the vertical central axis. The channel mating point of the seat ring and the valve body has a groove for installing O-rings. The cylindrical surface of the tail of the seat ring is machined with a lead angle for easy installation. A groove is provided on the end face of the tail of the seat ring, and the groove abuts against the boss of the positioning block. The positioning block is fixedly connected to the valve body. The valve body is an integral design, and the valve body and the pipeline are connected by butt welding.

2. The three-way reversing ball valve according to claim 1, characterized in that... The sealing ring assembly includes a main sealing ring, an inner sealing ring, and an outer sealing ring. Positioning steps are machined on the inner and outer sides of the main sealing ring near the seat ring, and the inner and outer positioning steps cooperate with the inner and outer sealing rings.

3. The three-way reversing ball valve according to claim 2, characterized in that... The inner and outer sealing rings are rigid metal bodies.

4. The three-way reversing ball valve according to claim 1, characterized in that... The spherical openings of channels I, II, III, and IV are machined with rounded corners that intersect the spherical surface, so that the rounded corners are tangent to the spherical surface.

5. The three-way reversing ball valve according to claim 1, characterized in that... The groove consists of two symmetrical grooves.

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