Slurry service ball valve

Abstract

A kind of ore pulp working condition ball valve, including valve body, the valve body is equipped with valve seat, valve stem, valve core, water inlet channel and water outlet channel, the valve seat includes sealing ring, the sealing ring end is embedded with sealing block connected with valve core sealing, the sealing ring is also equipped with flow channel, the flow channel is below sealing block, and it is L type and extends to the rear end of sealing ring, for pushing sealing ring to form tight fit connection to valve body, the multistage sealing structure of valve seat, including sealing ring, first sealing ring and second sealing ring, so that valve can keep stable and reliable sealing performance under different medium pressure and flow conditions, effectively reduce the risk of leakage, flow channel and its first flow channel and second flow channel separately arranged make the flow of medium more stable and smooth in the valve body, reduce flow resistance and impact, improve the flow capacity of valve.

Description

Technical Field

[0001] This utility model relates to a ball valve for slurry operation, belonging to the field of ball valves. Background Technology

[0002] Slurry conveying systems are widely used in mineral processing, metallurgy, chemical industry, and environmental protection. In these applications, the fluid flowing through the pipeline is a high-concentration slurry containing a large number of solid particles, exhibiting significant abrasiveness and impact. To control and regulate the slurry flow rate, ball valves are widely used as control elements in pipelines due to their relatively compact structure, low flow resistance, and low opening and closing torque. A typical ball valve consists of a valve body, valve seat assembly, valve core, valve stem, and drive mechanism. The sealing fit between the valve seat (or the seal within the valve seat) and the valve core is crucial for ensuring valve performance.

[0003] Existing ball valves for slurry applications largely follow the structural approach of ball valves for general applications. This involves placing a valve seat and sealing ring within the valve body, with the front end of the sealing ring fitting against the spherical surface of the valve core to achieve a seal when closed. The sealing ring typically uses elastic materials or a metal-plus-soft-seal structure, generally relying on the static fit between the valve body and seat, the pre-tightening force of fasteners, or local elastic elements to provide the contact pressure. In clean fluids or media with low solids content, this structure can generally meet the requirements. However, slurries contain a wide range of solid particles with high hardness and large flow velocity variations. The sealing parts are subjected to high-frequency erosion and repeated differential pressure over long periods, making it difficult to guarantee the reliability and lifespan of traditional structures. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings and deficiencies of the existing technology and to provide a ball valve for slurry operation.

[0005] A ball valve for slurry operation includes a valve body, which contains a valve seat, a valve stem, a valve core, an inlet channel, and an outlet channel. The valve seat includes a sealing ring, and a sealing block that is fitted into the end of the sealing ring and is sealed to the valve core. The sealing ring also has a flow channel located below the sealing block and extending in an L-shape to the rear end of the sealing ring, which is used to push the sealing ring toward the valve body to form a tight fit connection.

[0006] Furthermore, the flow channel includes a first flow channel arranged horizontally and a second flow channel arranged vertically in communication with the first flow channel, wherein the width of the first flow channel is greater than that of the second flow channel.

[0007] Furthermore, the sealing ring has a mounting groove on its rear side, a limiting ring is provided in the mounting groove, and a limiting groove with a flow channel connected to the bottom of the limiting ring is provided.

[0008] Furthermore, the top of the limiting ring is provided with a connecting groove facing the valve body.

[0009] Furthermore, the mounting groove is provided with a first sealing ring located in front of the limiting ring.

[0010] Furthermore, the limiting ring is made of an elastic material.

[0011] Furthermore, the valve body is provided with a push groove, and an elastic element is provided in the push groove. The other end of the elastic element abuts against the sealing ring and is used to push the sealing ring to move towards the valve core.

[0012] Furthermore, the sealing ring is also provided with a sealing groove located in front of the mounting groove, and a second sealing ring is provided in the sealing groove.

[0013] Furthermore, the valve stem is provided with a handwheel for driving the valve core to rotate.

[0014] The beneficial effects of this utility model are as follows: The multi-stage sealing structure on the valve seat, including a sealing ring, a first sealing ring, and a second sealing ring, enables the valve to maintain stable and reliable sealing performance under different media pressures and flow conditions, effectively reducing the risk of leakage. The flow channel and its separate first and second flow channels make the flow of the medium inside the valve body smoother and more stable, reducing flow resistance and impact, and improving the valve's flow capacity. The cooperation between the valve core, the push groove, and the elastic element allows the valve to automatically reset and provide buffering during opening and closing, reducing impact wear between structural components, thereby extending the valve's service life. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 for Figure 1 Enlarged detail view of point A in the middle; In the diagram, 1. Valve body; 2. Valve seat; 21. Sealing ring; 22. Sealing block; 23. Flow channel; 231. First flow channel; 232. Second flow channel; 24. Mounting groove; 25. Limiting ring; 251. Limiting groove; 252. Connecting groove; 26. First sealing ring; 27. Pushing groove; 28. Elastic element; 29. ​​Sealing groove; 291. Second sealing ring; 3. Valve stem; 31. Handwheel; 4. Valve core; 5. Inlet channel; 6. Outlet channel. Detailed Implementation

[0017] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0018] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0019] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0020] like Figure 1-2 The diagram illustrates an embodiment of a ball valve for slurry operation according to this invention. It includes a valve body 1, a valve seat 2, a valve stem 3, a valve core 4, an inlet channel 5, and an outlet channel 6. A sealing ring 21 is installed inside the valve seat 2. A sealing block 22, which fits against the valve core 4, is embedded at the front end of the sealing ring 21 to maintain a stable sealing surface during valve core rotation. A flow channel 23 is located below the sealing ring 21, extending from below the sealing block 22 and turning to the rear end of the sealing ring 21. This allows slurry or working medium to flow into the rear of the sealing ring along the channel, creating a localized thrust that causes the sealing ring 21 to tighten towards the inner wall of the valve body. This structure utilizes the fluid's own pressure for assisted positioning, achieving a relatively stable sealing state under high scouring and high pressure differential environments.

[0021] In actual operation, the valve core 4 is driven to rotate by the valve stem 3, enabling it to switch between opening and closing with the sealing block 22. When the slurry passes through the flow area inside the valve body 1, some of the fluid enters the space behind the sealing ring 21 along the flow channel 23, thereby enhancing the fit stability between the sealing ring 21 and the valve body 1. Unlike traditional rigid fit methods, this structure utilizes the fluid medium to create adaptive pressure, ensuring that the sealing stability remains within a reasonable range under different pressure conditions.

[0022] The overall technical effect of this embodiment is reflected in the following: the sealing ring 21 has the ability to automatically compensate for changes in medium pressure, reducing the loosening of the sealing fit caused by particle erosion; at the same time, it maintains a stable fit in the long-term vibration and flow field fluctuation environment of the valve body, thereby reducing the risk of uneven wear and leakage during opening and closing.

[0023] Optionally, in some embodiments, the flow channel 23 includes a horizontally extending first flow channel 231 and a vertically arranged second flow channel 232, which are interconnected. The width of the first flow channel 231 is significantly larger than that of the second flow channel 232. The extended inlet of the first flow channel 231 can slow down the flow velocity of the medium from the flow area, allowing the fluid entering the second flow channel 232 to act on the rear of the sealing ring at a relatively stable flow velocity, thereby avoiding the impact of violent pressure fluctuations on the sealing ring 21.

[0024] This flow channel structure can form a more stable pressure transmission mode in high-speed particulate media, so that the sealing ring 21 can obtain a more balanced stress state, thereby enhancing the long-term sealing reliability of the valve and reducing opening and closing wear.

[0025] Optionally, in some embodiments, a mounting groove 24 is formed on the rear side of the sealing ring 21, and a limiting ring 25 is disposed in the groove. A limiting groove 251 communicating with the flow channel 23 is formed at the bottom of the limiting ring 25, allowing the fluid entering through the second flow channel 232 to further act on the limiting ring 25, thus providing auxiliary support in the axial direction. In this structure, the limiting ring 25 stabilizes the posture of the sealing ring 21 and can adjust minute displacements under the propulsion of the fluid for adaptive compensation.

[0026] This structure makes the pressure regulation space behind the sealing ring more stable, which can reduce the displacement of the sealing ring under long-term scouring. At the same time, the limiting ring 25 can maintain the posture of the sealing ring 21, making the fit between the sealing block 22 and the valve core 4 more durable.

[0027] In some embodiments, the top of the limiting ring 25 is provided with a connecting groove 252 facing the valve body 1. The connecting groove 252 can correspond to the inner wall protrusion or fastening ring of the valve body 1, so that the limiting ring 25 can be reliably locked after installation, while allowing it to achieve axial elastic displacement within a very small range for use in conjunction with the pressure compensation function.

[0028] The position of the limiting ring 25 is more stable, which can effectively prevent displacement under high frequency vibration or high pressure differential conditions, and keep the compression compensation space behind the sealing ring 21 stable for a long time.

[0029] Optionally, in some embodiments, a first sealing ring 26 is provided in the mounting groove 24 in front of the limiting ring 25 to form a primary seal between the sealing ring 21 and the valve body 1.

[0030] This further ensures that the working space behind the sealing ring 21 is not disturbed by slurry particles, making the pressure compensation channel more stable and extending the overall life of the valve.

[0031] In some embodiments, the limiting ring 25 is made of a material with good elasticity, such as corrosion-resistant rubber or reinforced elastomer, which allows it to undergo micro-elastic deformation under pressure, thereby cooperating with the attitude adjustment of the sealing ring 21 and maintaining structural stability. This ensures that the sealing ring 21 maintains its cushioning properties in a vibration environment, reducing losses caused by rigid collisions between metals.

[0032] Optionally, in some embodiments, a push groove 27 is provided on the valve body 1, and an elastic element 28 (such as a spring or elastic gasket) is installed in the groove. One end of the elastic element 28 is fixed to the inner wall of the push groove 27, and the other end abuts against the sealing ring 21, providing a continuous thrust to the sealing ring 21 in the direction of the valve core, so that it remains in a fitted state during the rotation of the valve core 4.

[0033] A sealing groove 29 is provided on the sealing ring 21 in front of the mounting groove 24 to accommodate the second sealing ring 291. The sealing ring 291 and the first sealing ring 26 together form a double-layer sealing structure, making it difficult for slurry particles to enter the internal space of the sealing ring 21.

[0034] A handwheel 31 is provided on the valve stem 3. By manually rotating the handwheel 31, the valve stem 3 is driven to rotate, so that the valve core 4 can complete the opening or closing operation.

[0035] Working principle: During valve operation, the fluid medium enters the flow area of ​​the valve body and partially flows into the flow channel 23. This flow channel transmits the fluid to the space behind the sealing ring 21, creating pressure that pushes the sealing ring 21 towards the valve body for a tight fit. Simultaneously, the elastic element 28 continuously pushes the sealing ring towards the valve core, ensuring stable contact between the sealing surfaces over a long period. The limiting ring 25 stabilizes the sealing ring's position under the combined pressure of the medium and the structural design, allowing for minor displacement to compensate for wear. This double-sealing structure prevents slurry particles from entering the sealing ring, ensuring long-term stability of the pressure compensation and support structure.

[0036] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

[0037] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A ball valve for slurry operation, characterized in that: The valve includes a valve body, which contains a valve seat, a valve stem, a valve core, an inlet channel, and an outlet channel. The valve seat includes a sealing ring, and a sealing block that is fitted into the end of the sealing ring to form a tight fit with the valve core. The sealing ring also has a flow channel located below the sealing block and extending in an L-shape to the rear end of the sealing ring, which is used to push the sealing ring toward the valve body to form a tight fit connection.

2. The ball valve for slurry operation as described in claim 1, characterized in that: The flow channel includes a horizontally arranged first flow channel and a vertically arranged second flow channel connected to the first flow channel, wherein the width of the first flow channel is greater than that of the second flow channel.

3. The ball valve for slurry operation as described in claim 1, characterized in that: The sealing ring has a mounting groove on its rear side, a limiting ring is provided in the mounting groove, and a limiting groove with a flow channel is provided at the bottom of the limiting ring.

4. The ball valve for slurry operation as described in claim 3, characterized in that: The top of the limiting ring is provided with a connecting groove facing the valve body.

5. The ball valve for slurry operation as described in claim 3, characterized in that: The mounting groove is provided with a first sealing ring located in front of the limiting ring.

6. The ball valve for slurry operation as described in claim 5, characterized in that: The limiting ring is made of an elastic material.

7. The ball valve for slurry operation as described in claim 1, characterized in that: The valve body is provided with a push groove, and an elastic element is provided in the push groove. The other end of the elastic element abuts against the sealing ring and is used to push the sealing ring to move towards the valve core.

8. The ball valve for slurry operation as described in claim 7, characterized in that: The sealing ring is also provided with a sealing groove located in front of the mounting groove, and a second sealing ring is provided in the sealing groove.

9. The ball valve for slurry operation as described in claim 1, characterized in that: The valve stem is equipped with a handwheel for driving the valve core to rotate.

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