High sealing and erosion resistant slurry ball valve

Abstract

The application relates to a ball valve, in particular to a high-sealing and erosion-resistant slurry ball valve. The ball valve comprises a centering assembly, the centering assembly comprises two angle adjusting assemblies, the angle adjusting assemblies comprise positioning blocks, the two positioning blocks are symmetrically arranged on the upper and lower sides of a ball, a notch matched with a valve rod is arranged in the middle of the positioning block, and two sliding channels are arranged in the positioning block and are designed to be inclined to the center of the ball. The ball is positioned by two positioning plates, the sliding blocks gradually contact the sliding channels when a user penetrates the valve rod into the middle valve body, the ball rotates under the pressing of the sliding blocks and the sliding blocks are clamped into the sliding grooves in the positioning blocks, the ball and the valve rod do not need to be repeatedly adjusted, and the installation speed of the device is improved.

Description

Technical Field

[0001] This invention relates to a ball valve, and more specifically, to a high-sealing, erosion-resistant slurry ball valve. Background Technology

[0002] A slurry ball valve is a type of valve that controls the flow and shut-off of fluid by rotating a valve core (ball). Due to its advantages such as compact structure, good sealing performance, large flow rate, and high control accuracy, it is widely used in industries such as chemical, petroleum, metallurgy, power, light industry, and pharmaceutical.

[0003] Traditional slurry ball valves often use ceramic-lined ball valves. Ceramic-lined valves are high-strength, high-density valve products, but their material is relatively fragile and prone to wear during use, especially under complex conditions such as high temperature and high pressure. Therefore, timely maintenance and replacement are necessary. Compared to ordinary valves, ceramic-lined valves are more difficult to install due to their relatively fragile material. Special attention must be paid to protective measures during installation to avoid damage. Furthermore, the installation of ceramic-lined valves requires certain professional knowledge and skills; otherwise, improper installation can easily occur. Although ceramic-lined valves have high strength and wear resistance, their corrosion resistance is relatively poor. They are easily corroded and eroded in some acidic and alkaline media, thus failing to meet the requirements of some special operating conditions. Additionally, for large-diameter valves, the ball is heavy, making it difficult to adjust the sealing position. Repeated adjustments and repairs to the valve stem result in poor sealing performance, and the stuffing box is prone to jamming and leakage. Therefore, we propose a high-sealing, erosion-resistant slurry ball valve. Summary of the Invention

[0004] The purpose of this invention is to provide a high-sealing, erosion-resistant slurry ball valve to solve the problems mentioned in the background art. 1. Poor sealing performance makes it difficult to align the ball valve and valve seat during installation, requiring repeated adjustments and disassembly, which can easily cause scratches and dents to the sealing surface, affecting the sealing effect. 2. The ball of a large-diameter ball valve is relatively heavy and tends to sink, which requires repeated adjustment and repair of the valve stem to maintain the sealing position. 3. The stuffing box is prone to jamming and leakage; 4. The sealing surface is prone to severe wear under slurry conditions.

[0005] To achieve the above objectives, a high-sealing, erosion-resistant slurry ball valve is provided, comprising an intermediate valve body, a ball rotatably disposed inside the intermediate valve body, and a valve stem rotatably disposed inside the intermediate valve body for rotating the ball. Grooves for the valve stem to pass through are provided on both the upper and lower sides of the ball. One end of the valve stem is rotatably disposed on the upper side of the intermediate valve body. A centering assembly for positioning the ball is disposed inside the intermediate valve body. Side valve bodies are disposed at both ends of the intermediate valve body, and sealing assemblies for sealing the side valve bodies are disposed inside the side valve bodies. The centering assembly includes two angle adjustment assemblies, each including a positioning block. The two positioning blocks are symmetrically disposed on the upper and lower sides of the ball. A groove matching the valve stem is provided in the middle of each positioning block. Two slides are provided inside each positioning block, and the slides are designed to be inclined towards the center of the ball.

[0006] When the valve stem is inserted into the middle valve body, the user controls the two sliders to be parallel to the positioning plate. After one end of the valve stem enters the interior of the positioning block, the slider gradually moves to the upper side of the slide and presses the slide. When the slider is pressed, the slide and the ball rotate. A groove matching the slider is provided on one side of the slide. When the positioning block rotates, the slider slides along the slide to the groove on one side of the slide and drives the ball to rotate to adjust the angle of the ball.

[0007] As a further improvement to this technical solution, the interior of the intermediate valve body is provided with an arc-shaped groove that matches the ball. The interior of the positioning block is provided with two locking blocks. The locking blocks are located on one side of the slide rail. The upper side of the locking blocks is an inclined surface. The interior of the positioning block is provided with a sliding groove for limiting the locking blocks. The interior of the sliding groove is fixedly provided with a first compression spring for pressing the locking blocks. One end of the first compression spring is fixedly connected to the locking blocks.

[0008] As the slider is pressed, the locking block gradually slides into the groove on one side until the slider slides to the bottom of the locking block. After the slider slides to the bottom of the locking block, the first compression spring immediately pushes the locking block out of the groove and fixes the slider, preventing the slider and valve stem from sliding upward after installation, which would cause the valve stem to deviate from its position.

[0009] As a further improvement to this technical solution, positioning plates are provided at both ends of the ball. The positioning plates are fixedly installed inside the intermediate valve body. Multiple screws for fixing the positioning plates are threaded to the side of the positioning plates away from the ball. The side of the positioning plates near the ball is an arc-shaped inclined surface that matches the ball. The side of the positioning plates near the ball is in contact with the outer wall of the ball.

[0010] After placing the ball inside the intermediate valve body, the user places the positioning plate inside the intermediate valve body and aligns one side of the positioning plate with the ball. Then, the user tightens the screws on one side of the ball to fix the positioning plate and initially secure the ball.

[0011] As a further improvement to this technical solution, a second pad is provided on the lower side of the ball. The second pad is rotatably disposed inside the intermediate valve body. One end of the valve stem is inserted into the interior of the second pad. The interior of the second pad is symmetrically and fixedly provided with protrusions for positioning the valve stem.

[0012] After passing through the ball, the valve stem is inserted into the interior of the second pad. The lower side of the valve stem has small holes that match the two protrusions. After one end of the valve stem enters the interior of the second pad, the two protrusions are inserted into the small holes on the lower side of the valve stem to position the valve stem.

[0013] As a further improvement to this technical solution, a slider matching the slide rail is symmetrically fixed on one side of the valve stem. The lower side of the slider is an inclined surface. A groove matching the slider is opened inside the valve stem. A second compression spring for pressing the slider is fixedly installed inside the groove. One end of the second compression spring is fixedly connected to the slider.

[0014] As the slider passes through the stuffing box and the sealing ring, it is pressed into the inside of the valve stem. After passing through the stuffing box and the sealing ring, the No. 2 compression spring immediately ejects the slider from the groove inside the valve stem.

[0015] As a further improvement to this technical solution, the sealing assembly includes a valve seat, and the inside of the side valve body is provided with a groove that matches the valve seat. A No. 3 compression spring is fixedly installed inside the valve seat, and the No. 3 compression spring is used to press the side wall of the valve seat close to the side wall of the side valve body.

[0016] When the No. 3 compression spring is pressed, the side wall of the valve seat and the inner wall of the side valve body are tightly fitted to prevent gaps between the valve seat and the inner wall of the side valve body from causing slurry to seep into the gap between the valve seat and the side valve body.

[0017] As a further improvement to this technical solution, a pressure plate is fixedly installed on the side of the side valve body near the middle valve body. A groove matching the pressure plate is opened on one side of the valve seat. Multiple screws for fixing the pressure plate are threaded to one side of the pressure plate. A sealing ring is provided on the outer side of the pressure plate. The sealing ring is fixedly installed between the middle valve body and the side valve body. Grooves for fixing the sealing ring are opened on the sides of the middle valve body and the side valve body that are close to each other.

[0018] After placing the valve seat inside the side valve body, the user places the pressure plate on one side of the valve seat and presses it to ensure that one side of the valve seat fits tightly against the inner wall of the side valve body. This prevents the slurry inside the middle valve body from seeping into the space between the valve seat and the inner wall of the side valve body. After placing the pressure plate, the user tightens the screws on one side of the pressure plate to fix it to one side of the side valve body. The sealing ring is used to prevent the slurry from seeping out from the gap between the middle valve body and the side valve body.

[0019] As a further improvement to this technical solution, a stuffing box is provided inside the intermediate valve body, and the stuffing box is filled with filler material. Flexible graphite gaskets and O-rings are provided on both the upper and lower sides of the filler material. The flexible graphite gasket is located in the middle of the filler material and the O-ring. The flexible graphite gasket and the O-ring are fixedly installed inside the stuffing box. The valve stem rotates and passes through the middle of the flexible graphite gasket and the O-ring. A handle for driving the valve stem to rotate is fixedly provided at one end of the valve stem located on the upper side of the intermediate valve body.

[0020] Flexible graphite gaskets and O-rings provide multiple seals for the inside of the stuffing box, preventing slurry from seeping into the stuffing box from the intermediate valve body. After the device is installed, the user can rotate the ball by turning the handle to control the flow of slurry inside the intermediate valve body.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this high-sealing, erosion-resistant slurry ball valve, the ball is positioned by two positioning plates. When the user inserts the valve stem into the middle valve body, the slider gradually contacts the slide rail. Under the pressure of the slider, the ball rotates and the slider is locked into the slide groove inside the positioning block. When one end of the valve stem slides into the interior of the second pad, the valve stem is positioned by two protrusions. There is no need to repeatedly adjust the ball and valve stem, which improves the installation speed of the device.

[0022] 2. In this high-sealing, erosion-resistant slurry ball valve, after the valve seat is placed inside the side valve body, the No. 3 compression spring presses the side wall of the valve seat to fit against the inside of the side valve body. At the same time, the pressure plate presses and fixes the valve seat inside the side valve body. During the installation of the side valve body, the side valve body and the sealing assembly are connected to the middle valve body as a whole. The installation is convenient, the sealing surface is easy to center, and the sealing performance of the device is improved.

[0023] 3. In this high-sealing and erosion-resistant slurry ball valve, the inner cavity flow surfaces of the intermediate valve body, ball, side valve body and valve seat are all sprayed with hard material, and the mating sealing surfaces are overlaid with hard material with a hardness of not less than HRC68 and a friction stroke of more than 200,000 kilometers, which greatly improves the wear resistance of the device.

[0024] 4. In this high-sealing, erosion-resistant slurry ball valve, flexible graphite gaskets and O-rings are installed on both the upper and lower sides of the packing material to provide multiple seals inside the stuffing box, ensuring the high-temperature and low-temperature performance of the device and preventing jamming or leakage in the stuffing box. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the intermediate valve body structure of the present invention; Figure 3 This is an exploded view of the sphere and positioning plate structure of the present invention; Figure 4 This is a cross-sectional view of the positioning block structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is an exploded view of the valve stem and the second pad block structure of the present invention; Figure 7 This is a schematic diagram of the side valve body and sealing assembly structure of the present invention; Figure 8 This is an exploded view of the side valve body and sealing assembly structure of the present invention.

[0026] The meanings of the labels in the diagram are as follows: 1. Intermediate valve body; 2. Ball; 3. Valve stem; 4. Centering assembly; 41. Angle adjustment assembly; 411. Positioning block; 412. Slide rail; 413. Locking block; 414. No. 1 compression spring; 42. Positioning plate; 43. First pad; 44. Sealing ring; 45. Second pad; 46. Protrusion; 47. Slider; 48. Second compression spring; 5. Side valve body; 6. Sealing assembly; 61. Valve seat; 62. No. 3 compression spring; 63. Pressure plate; 64. Sealing ring; 7. Filler; 8. Flexible graphite washer; 9. O-ring; 10. Throttle; 11. Connecting rod; 12. Nut. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, counterclockwise, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] Example 1 Please see Figures 1-2 As shown, the purpose of this embodiment is to provide a high-sealing, erosion-resistant slurry ball valve, including an intermediate valve body 1. The intermediate valve body 1 is detachable, and a ball 2 is rotatably disposed inside the intermediate valve body 1. When using the device, the user first disassembles the intermediate valve body 1 and places the ball 2 inside the intermediate valve body 1. The intermediate valve body 1 has an arc-shaped groove that matches the ball 2. After the user places the ball 2 inside the intermediate valve body 1, the side wall of the ball 2 fits against the arc-shaped groove inside the intermediate valve body 1, preventing the slurry inside the intermediate valve body 1 from seeping into the gap between the ball 2 and the inner wall of the intermediate valve body 1, which would cause slurry leakage inside the intermediate valve body 1.

[0030] Please see Figures 2-3 As shown, the intermediate valve body 1 is equipped with a centering component 4 for positioning the ball 2. Positioning plates 42 are provided at both ends of the ball 2. The positioning plates 42 are fixedly installed inside the intermediate valve body 1. The two positioning plates 42 are used for initial positioning of the ball 2. Multiple screws are threaded onto the side of the positioning plate 42 away from the ball 2 for fixing the positioning plate 42. To ensure a tight fit between one side of the positioning plate 42 and the ball 2, preventing the slurry inside the intermediate valve body 1 from flowing through the gap between the ball 2 and the positioning plate 42, the side of the positioning plate 42 near the ball 2 has an arc-shaped bevel that matches the ball 2. The side of the positioning plate 42 near the ball 2 is in contact with the outer wall of the ball 2. After placing the ball 2 inside the intermediate valve body 1, the user places the positioning plate 42 inside the intermediate valve body 1 and fits one side of the positioning plate 42 against the ball 2. The user then tightens the screws on one side of the ball 2 to fix the positioning plate 42 and initially fix the ball 2.

[0031] Please see Figures 2-5As shown, the intermediate valve body 1 has a valve stem 3 rotatably mounted inside to drive the ball 2 to rotate. The ball 2 has slots on both the upper and lower sides for the valve stem 3 to pass through. One end of the valve stem 3 is rotatably mounted on the upper side of the intermediate valve body 1. After the ball 2 is initially fixed, the user inserts the valve stem 3 into the interior of the intermediate valve body 1 from the upper side. After entering the interior of the intermediate valve body 1, one end of the valve stem 3 gradually approaches the slot on the upper side of the intermediate valve body 1. The centering assembly 4 includes two angle adjustment assemblies 41. The angle adjustment assembly 41 includes a positioning block 411. The two positioning blocks 411 are symmetrically arranged on the upper and lower sides of the ball 2. The positioning block 411 has a slot in the middle that matches the valve stem 3. The positioning block 411 is used to position the valve stem 3. After entering the interior of the intermediate valve body 1, the valve stem 3 gradually slides into the slot in the middle of the positioning block 411.

[0032] Please see Figures 2-6 As shown, the positioning block 411 has two slides 412 inside. The slides 412 are designed to be inclined towards the center of the ball 2. The two slides 412 are symmetrical about the axis of the positioning block 411. The valve stem 3 is symmetrically fixed with sliders 47 that match the slides 412 on one side. The lower side of the sliders 47 is inclined. When the valve stem 3 is inserted into the middle valve body 1, the user controls the two sliders 47 to be parallel to the positioning plate 42. After one end of the valve stem 3 enters the interior of the positioning block 411, the sliders 47 gradually move to the upper side of the slides 412 and press the slides 412. When the sliders 47 are pressed, the slides 412 and the ball 2 rotate. A groove matching the sliders 47 is opened on one side of the slides 412. When the positioning block 411 rotates, the sliders 47 slide along the slides 412 into the groove on one side of the slides 412 and drive the ball 2 to rotate to adjust the angle of the ball 2.

[0033] Please see Figures 2-6 As shown, the positioning block 411 has two sliding blocks 413 inside. The blocks 413 are located on one side of the slide rail 412. The upper side of the blocks 413 is an inclined surface. After the slider 47 contacts the inclined surface on the upper side of the blocks 413, it presses the blocks 413. The positioning block 411 has a groove inside for limiting the blocks 413. Under the pressure of the slider 47, the blocks 413 gradually slide into the groove on one side until the slider 47 slides to the lower side of the blocks 413. The groove is fixedly provided with a first compression spring 414 for pressing the blocks 413. One end of the first compression spring 414 is fixedly connected to the blocks 413. After the slider 47 slides to the lower side of the blocks 413, the first compression spring 414 immediately pushes the blocks 413 out of the groove and fixes the slider 47 to prevent the slider 47 and the valve stem 3 from sliding upward after installation, which would cause the position of the valve stem 3 to deviate.

[0034] Please see Figures 2-6As shown, to prevent the slurry inside the intermediate valve body 1 from leaking to the upper side of the ball 2, a first pad 43 is provided on the upper side of the ball 2. A sealing ring 44 is fixedly installed on the upper side of the first pad 43. Both the first pad 43 and the sealing ring 44 are fixedly installed inside the intermediate valve body 1. The valve stem 3 rotates and passes between the first pad 43 and the sealing ring 44. To facilitate the sliding block 47 passing through the first pad 43 and the sealing ring 44, the upper side of the sealing ring 44 has an inclined surface that matches the sliding block 47. The valve stem 3 has a groove inside that matches the slider 47. When the lower side of the slider 47 contacts the inclined surface on the upper side of the sealing ring 44, the slider 47 is pressed into the groove inside the valve stem 3. Then the slider 47 passes through the middle of the sealing ring 44 and the first pad 43. The groove is fixedly provided with a second compression spring 48 for pressing the slider 47. One end of the second compression spring 48 is fixedly connected to the slider 47. When the slider 47 passes through the first pad 43, the second compression spring 48 immediately pops the slider 47 out.

[0035] Please see Figures 2-5 As shown, in order to facilitate the positioning of the valve stem 3, a second pad 45 is provided on the lower side of the ball 2. The second pad 45 is rotatably set inside the middle valve body 1. One end of the valve stem 3 is inserted into the interior of the second pad 45. After passing through the ball 2, the valve stem 3 is inserted into the interior of the second pad 45. The interior of the second pad 45 is symmetrically fixed with protrusions 46 for positioning the valve stem 3. The lower side of the valve stem 3 has small holes that match the two protrusions 46. After one end of the valve stem 3 enters the interior of the second pad 45, the two protrusions 46 are inserted into the small holes on the lower side of the valve stem 3 to position the valve stem 3.

[0036] Please see Figures 2-6 As shown, a stuffing box is provided inside the intermediate valve body 1, and the stuffing box is filled with filler material 7. In order to prevent leakage inside the stuffing box, flexible graphite gaskets 8 and O-rings 9 are provided on both the upper and lower sides of the filler material 7. The flexible graphite gasket 8 is located in the middle of the filler material 7 and the O-ring 9. Both the flexible graphite gasket 8 and the O-ring 9 are fixed inside the stuffing box. The flexible graphite gasket 8 and the O-ring 9 provide multiple seals for the inside of the stuffing box, preventing the slurry inside the intermediate valve body 1 from seeping into the stuffing box. The valve stem 3 rotates and passes between the flexible graphite gasket 8 and the O-ring 9. The upper side of the upper O-ring 9 has an inclined surface that matches the slider 47. When the slider 47 passes through the inclined surface on the upper side of the O-ring 9, the slider 47 is pressed into the groove inside the valve stem 3. After the slider 47 passes through the stuffing box, the second compression spring 48 immediately pops the slider 47 out.

[0037] Please see Figures 1-8As shown, side valve bodies 5 are provided at both ends of the intermediate valve body 1. To prevent leakage inside the side valve bodies 5, a sealing assembly 6 is provided inside the side valve bodies 5 for sealing the side valve bodies 5. The sealing assembly 6 includes a valve seat 61. The flow surfaces of the inner cavities of the intermediate valve body 1, ball 2, side valve bodies 5, and valve seat 61 are all sprayed with hard material, and the mating sealing surfaces are overlaid with hard material with a hardness of not less than HRC68 and a friction stroke of more than 200,000 kilometers, which greatly improves the wear resistance of the device. The side valve bodies 5 have internal openings There is a groove that matches the valve seat 61. When installing the sealing assembly 6, the user first inserts the valve seat 61 into the groove inside the side valve body 5. A third compression spring 62 is fixedly installed inside the valve seat 61. The third compression spring 62 is used to press the side wall of the valve seat 61 close to the inner wall of the side valve body 5. Under the pressure of the third compression spring 62, the side wall of the valve seat 61 and the inner wall of the side valve body 5 are tightly fitted to prevent gaps between the valve seat 61 and the inner wall of the side valve body 5 from causing slurry to seep into the gap between the valve seat 61 and the side valve body 5.

[0038] Please see Figures 7-8 As shown, a pressure plate 63 is fixedly installed on the side of the side valve body 5 near the middle valve body 1. A groove matching the pressure plate 63 is opened on one side of the valve seat 61. After the valve seat 61 is placed inside the side valve body 5, the user places the pressure plate 63 on one side of the valve seat 61 and presses it to make one side of the valve seat 61 fit tightly against the inner wall of the side valve body 5, preventing the slurry inside the middle valve body 1 from seeping from one side of the valve seat 61 into the space between the valve seat 61 and the inner wall of the side valve body 5. Multiple screws for fixing the pressure plate 63 are threaded on one side of the pressure plate 63. After the pressure plate 63 is placed, the user tightens the screws on one side of the pressure plate 63 to fix the pressure plate 63 to one side of the side valve body 5.

[0039] Please see Figures 1-8 As shown, after installing the valve seat 61 and the pressure plate 63, the user places the two side valve bodies 5 on both sides of the middle valve body 1. To prevent the slurry from seeping out from the gap between the middle valve body 1 and the side valve bodies 5, a sealing ring 64 is provided on the outer side of the pressure plate 63. The sealing ring 64 is fixedly set between the middle valve body 1 and the side valve bodies 5. The middle valve body 1 and the side valve bodies 5 are provided with slots for fixing the sealing ring 64 on the side that is close to each other. When connecting the middle valve body 1 and the side valve bodies 5, the user places the sealing ring 64 in the slot between the middle valve body 1 and the side valve bodies 5 to seal the gap between the middle valve body 1 and the side valve bodies 5.

[0040] Please see Figures 1-2As shown, multiple connection holes are provided on one side of the side valve body 5. A connecting rod 11 is slidably inserted between the connection holes of the two side valve bodies 5. Nuts 12 for fixing the connecting rod 11 are threaded to both ends of the connecting rod 11. After the two side valve bodies 5 are connected to the middle valve body 1, the user inserts the connecting rod 11 into the connection holes on one side of the two side valve bodies 5 respectively and tightens the multiple nuts 12 on both ends of the connecting rod 11 to fix the connecting rod 11 and connect the middle valve body 1 and the two side valve bodies 5. A threaded hole for connecting to the pipeline is provided at the end of the side valve body 5 away from the middle valve body 1. After the device is installed, the user connects the pipeline for conveying slurry to the threaded hole on one side of the two side valve bodies 5. A handle 10 for driving the valve rod 3 to rotate is fixed at the end of the valve rod 3 located on the upper side of the middle valve body 1. After the device is installed on the pipeline for conveying slurry, the user drives the ball 2 to rotate by rotating the handle 10 and controls the flow of slurry inside the middle valve body 1.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-sealing, erosion-resistant slurry ball valve, comprising an intermediate valve body (1), wherein a ball (2) is rotatably disposed inside the intermediate valve body (1), characterized in that: The intermediate valve body (1) is internally equipped with a valve stem (3) for rotating the ball (2). The ball (2) has slots on both its upper and lower sides for the valve stem (3) to pass through. One end of the valve stem (3) is rotatably positioned on the upper side of the intermediate valve body (1). The intermediate valve body (1) is internally equipped with a centering assembly (4) for positioning the ball (2). Side valve bodies (5) are located at both ends of the intermediate valve body (1). The side valve bodies (5) are internally equipped with components for positioning the side valve bodies. (5) A sealing assembly (6) for sealing, wherein the centering assembly (4) includes two angle adjustment assemblies (41), wherein the angle adjustment assembly (41) includes a positioning block (411), wherein the two positioning blocks (411) are symmetrically arranged on the upper and lower sides of the ball (2), wherein the positioning block (411) has a slot in the middle that matches the valve stem (3), wherein the positioning block (411) has two slides (412) inside, wherein the slides (412) are designed to be inclined toward the center of the ball (2).

2. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: The intermediate valve body (1) has an arc-shaped groove inside that matches the ball (2). The positioning block (411) has two sliding blocks (413) inside. The blocks (413) are located on one side of the slide rail (412). The upper side of the blocks (413) is an inclined surface. The positioning block (411) has a sliding groove inside for limiting the blocks (413). A first compression spring (414) for pressing the blocks (413) is fixedly installed inside the sliding groove. One end of the first compression spring (414) is fixedly connected to the blocks (413).

3. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: Both ends of the ball (2) are provided with positioning plates (42). The positioning plates (42) are fixedly installed inside the intermediate valve body (1). The side of the positioning plate (42) away from the ball (2) is threaded with multiple screws for fixing the positioning plate (42). The side of the positioning plate (42) close to the ball (2) is an arc-shaped inclined surface that matches the ball (2). The side of the positioning plate (42) close to the ball (2) is in contact with the outer wall of the ball (2).

4. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: A first pad (43) is provided on the upper side of the ball (2), and a sealing ring (44) is fixedly provided on the upper side of the first pad (43). The first pad (43) and the sealing ring (44) are both fixedly provided inside the intermediate valve body (1), and the valve stem (3) rotates and passes between the first pad (43) and the sealing ring (44).

5. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: The ball (2) is provided with a second pad (45) on its lower side. The second pad (45) is rotatably disposed inside the intermediate valve body (1). One end of the valve stem (3) is inserted into the inside of the second pad (45). The second pad (45) is symmetrically fixed with protrusions (46) for positioning the valve stem (3) on the left and right sides.

6. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: The valve stem (3) is symmetrically fixed with sliders (47) that match the slide rail (412) on one side. The lower side of the slider (47) is an inclined surface. The valve stem (3) has a groove that matches the slider (47) inside. A second compression spring (48) for pressing the slider (47) is fixedly installed inside the groove. One end of the second compression spring (48) is fixedly connected to the slider (47).

7. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: The sealing assembly (6) includes a valve seat (61). The inside of the side valve body (5) is provided with a groove that matches the valve seat (61). A third compression spring (62) is fixedly installed inside the valve seat (61). The third compression spring (62) is used to press the side wall of the valve seat (61) close to the inner wall of the side valve body (5).

8. The high-sealing, erosion-resistant slurry ball valve according to claim 7, characterized in that: A pressure plate (63) is fixedly installed on the side of the side valve body (5) near the middle valve body (1). A groove matching the pressure plate (63) is opened on one side of the valve seat (61). A plurality of screws for fixing the pressure plate (63) are threadedly connected on one side of the pressure plate (63). A sealing ring (64) is provided on the outer side of the pressure plate (63). The sealing ring (64) is fixedly installed between the middle valve body (1) and the side valve body (5). A groove for fixing the sealing ring (64) is opened on the side of the middle valve body (1) and the side valve body (5) that are close to each other.

9. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: The intermediate valve body (1) has a stuffing box inside, and the stuffing box is filled with filler material (7). Flexible graphite gaskets (8) and O-rings (9) are provided on both the upper and lower sides of the filler material (7). The flexible graphite gasket (8) is located in the middle of the filler material (7) and the O-ring (9). The flexible graphite gasket (8) and the O-ring (9) are fixedly located inside the stuffing box. The valve stem (3) rotates through the middle of the flexible graphite gasket (8) and the O-ring (9). A handle (10) for driving the valve stem (3) to rotate is fixedly provided at one end of the valve stem (3) located on the upper side of the intermediate valve body (1).

10. The high-sealing, erosion-resistant slurry ball valve according to claim 1, characterized in that: The side valve body (5) has a threaded hole for connecting to the pipe at one end away from the middle valve body (1). The side valve body (5) has multiple connection holes on one side. A connecting rod (11) is slidably inserted between the two connection holes of the side valve body (5). Both ends of the connecting rod (11) are threaded with nuts (12) for fixing the connecting rod (11).

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