A multi-stage pressure-reducing granular operating ball valve

Abstract

The present application relates to a kind of multistage pressure reducing particle operating ball valve, can be used in petrochemical, power field blowdown, drainage system. By valve body, ball valve, valve seat, valve stem, bolt, nut, packing gland, packing is composed. Valve seat is arranged in valve body, ball valve is closely combined with valve seat, keeps the sealing of valve closed state;Valve stem can drive ball valve 90 degrees rotation, realizes valve opening, closing. Part of the flow channel of ball valve is set to V shape, another part of flow channel is set to semicircle, the inner hole of ball valve flow channel is provided with multiple orifice plates, multiple through holes are provided on the orifice plate, realize the multistage pressure reduction of valve small opening degree operating condition medium, avoid sealing surface erosion, while avoiding impurities to press the sealing surface, improve valve sealing and service life.

Description

Technical Field

[0001] This invention relates to a multi-stage pressure-reducing ball valve for particle operation, which can be used in sewage and drainage systems in the petrochemical and power industries. Background Technology

[0002] In the petrochemical and power industries, the sewage and drainage systems of equipment are prone to damage to the sealing surfaces of valves such as ball valves and gate valves due to the large pressure difference of the medium and the presence of solid particles and other impurities. This is especially true under small opening conditions, where the medium's erosion of the sealing surface is particularly severe, greatly affecting the valve's sealing performance and service life.

[0003] This invention provides a multi-stage pressure-reducing ball valve for particle operation. Part of the flow channel of the ball disc is set in a V shape, and another part of the flow channel is set in a semi-circular shape. Multiple throttling orifice plates are set in the inner hole of the flow channel of the ball disc, and multiple through holes are set on the throttling orifice plates. This enables multi-stage pressure reduction of the medium under small valve opening conditions, avoids erosion of the sealing surface, and avoids impurities damaging the sealing surface, thus greatly improving the valve's sealing performance and service life. Summary of the Invention

[0004] This invention provides a multi-stage pressure-reducing ball valve for particle operation, comprising a valve body, a ball disc, a valve seat, a valve stem, bolts, nuts, a packing gland, and packing. The valve seat is located within the valve body, and the ball disc fits tightly against the valve seat to maintain a seal when the valve is closed. The valve stem is connected to the ball disc via a valve stem groove, and the valve stem drives the ball disc to rotate 90 degrees, realizing the opening and closing of the valve. Bolts and nuts tighten the packing gland, further compressing the packing and ensuring a seal at the valve stem.

[0005] One part of the flow channel of the spherical disc is V-shaped, and the other part is semi-circular. The V-shaped flow channel and the semi-circular flow channel transition naturally with a circle R. Multiple throttling orifice plates are set in the inner hole of the spherical disc flow channel. Each throttling orifice plate has multiple through holes, and the through holes of each throttling orifice plate are staggered. A circular through hole is set on the outlet side of the spherical disc in the vertical direction of the spherical disc flow channel. A valve stem groove is set at the upper end of the spherical disc. The valve stem groove is matched and used with the lower end of the valve stem. The valve stem groove can be set as a square, rectangle, or regular hexagon.

[0006] When the valve is closed, the ball disc and valve seat sealing surface are tightly fitted, blocking the valve flow path and maintaining a valve seal. When the valve is opened, the valve stem drives the ball disc to rotate, gradually opening the valve. During the opening process, the V-shaped flow path gradually opens from small to large, allowing the high-pressure medium to flow through the V-shaped flow path for the first stage of pressure reduction. Further pressure reduction is achieved through the through-holes of each throttling orifice plate, effectively controlling the medium flow rate and preventing high-speed medium from eroding the valve internals and the inner wall of the cavity. Simultaneously, impurities can flow out smoothly through each through-hole.

[0007] When the valve is fully open, both the V-shaped and semi-circular flow channels are open, and the orifice plate is parallel to the direction of medium flow, allowing impurities to pass smoothly and preventing blockage. At the same time, the ball disc fits tightly against the valve seat sealing surface, protecting the sealing surface from erosion.

[0008] The beneficial effects of this invention are that the multi-stage pressure reducing ball valve for particle operation effectively controls the medium flow rate through the V-shaped flow channel of the ball disc and the multi-stage pressure reduction of multiple throttling orifice plates, avoiding the scouring of the valve internals and inner wall of the cavity by the high-speed medium when the opening is small; at the same time, it can allow impurities to pass through smoothly, avoid blockage, and greatly improve the service life of the valve. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a multi-stage pressure-reducing ball valve for particle operation. Figure 2 This is a cross-sectional view of the valve in the closed state; Figure 3 This is a cross-sectional view of the valve when it is initially opened; Figure 4 This is a cross-sectional view of the valve in its fully open state; Figure 5 It is a cross-sectional view of the spherical lobe; Figure 6 This is a CC cross-sectional view of the spherical lobe; Figure 7 This is the A-direction view of the spherical lobe; Figure 8 This is the B-direction view of the spherical lobe.

[0010] In the diagram, 1. Valve body, 2. Ball disc, 3. Valve seat, 4. Valve stem, 5. Bolt, 6. Nut, 7. Packing gland, 8. Packing, 9. Orifice plate, 10. Through hole, 11. Impurity, 12. Circular through hole, 13. Valve stem groove, 14. Semi-circular flow channel, 15. V-shaped flow channel Detailed Implementation exist Figure 1 In the embodiment shown, the present invention provides a multi-stage pressure-reducing ball valve for particle operation, which consists of a valve body (1), a ball disc (2), a valve seat (3), a valve stem (4), bolts (5), nuts (6), a packing gland (7), and packing (8). The valve seat (3) is located inside the valve body (1), and the ball disc (2) fits tightly against the valve seat (3) to maintain the valve in a closed state. The valve stem (4) is connected to the ball disc (2) through the valve stem groove (13), and the valve stem (4) drives the ball disc (2) to rotate 90 degrees to realize the opening and closing of the valve. The bolts (5) and nuts (6) press the packing gland (7) to further press the packing (8) to ensure the sealing at the valve stem (4).

[0011] exist Figure 2 , Figure 3In the embodiment shown, when the valve is closed, the ball disc (2) and the valve seat (3) sealing surface are tightly fitted to block the valve flow channel and keep the valve sealed; when the valve is opened, the valve stem (4) drives the ball disc (2) to rotate so that the valve gradually opens. During the valve opening process, the V-shaped flow channel (15) of the ball disc (2) gradually opens from small to large. The high-pressure medium achieves the first stage of pressure reduction through the V-shaped flow channel (15), and then achieves the second, third and even more stages of pressure reduction through the through holes (10) of each throttling orifice plate (9), effectively controlling the medium flow rate and avoiding the high-speed medium from scouring the valve internals and the inner wall of the cavity.

[0012] exist Figure 4 In the illustrated embodiment, when the valve is fully open, the V-shaped flow channel (15) and the semi-circular flow channel (14) of the ball valve (2) are fully open, and the throttling orifice plate (9) is parallel to the direction of medium flow, allowing impurities (11) to pass smoothly and avoiding blockage of the flow channel. At the same time, the ball valve (2) and the valve seat (3) sealing surface are tightly fitted, protecting the sealing surface from medium erosion.

[0013] exist Figure 5 , Figure 6 , Figure 7 , Figure 8 In the illustrated embodiment, one part of the flow channel of the spherical petal (2) is set as V-shaped, and the other part of the flow channel is set as semi-circular. The V-shaped flow channel (15) and the semi-circular flow channel (14) are naturally transitioned by a circle R. Multiple throttling orifice plates (9) are set in the inner hole of the flow channel of the spherical petal (2). Each throttling orifice plate (9) is arranged parallel to the flow channel. Multiple through holes (10) are set on the throttling orifice plate (9). The through holes (10) of each throttling orifice plate (9) are staggered. A circular through hole (12) is set on the outlet side of the spherical petal (2) in the vertical direction of the flow channel of the spherical petal (2). A valve stem groove (13) is set at the upper end of the spherical petal (2). The valve stem groove (13) is matched and used with the lower end of the valve stem (4). The valve stem groove (13) can be set as a square, rectangle or regular hexagon.

[0014] The multi-stage pressure reducing ball valve for particle operation provided by the present invention achieves multi-stage pressure reduction through the V-shaped flow channel (15) of the ball disc (2) and multiple throttling orifice plates (9), effectively controlling the medium flow rate and avoiding the scouring of the valve internals and inner wall of the cavity by the high-speed medium; at the same time, it allows impurities to pass through smoothly, avoids blockage, and greatly improves the service life of the valve.

Claims

1. A multi-stage pressure-reducing ball valve for particle operation, comprising a valve body (1), a ball disc (2), a valve seat (3), a valve stem (4), a bolt (5), a nut (6), a packing gland (7), and packing (8), characterized in that: The valve seat (3) is set inside the valve body (1), and the ball valve (2) fits tightly with the valve seat (3); part of the flow channel of the ball valve (2) is set as V-shaped, and the other part of the flow channel is set as semi-circular. The V-shaped flow channel (15) and the semi-circular flow channel (14) are naturally transitioned by a circle R. Multiple throttling orifice plates (9) are set in the inner hole of the flow channel of the ball valve (2). Each throttling orifice plate (9) is arranged parallel to the flow channel. A circular through hole (12) is set on the outlet side of the ball valve (2) in the vertical direction of the flow channel of the ball valve (2). The valve stem (4) and the valve body (1) are sealed with packing (8). Bolts (5) and nuts (6) are used to tighten the packing gland (7) and simultaneously tighten the packing (8).

2. The multi-stage pressure-reducing ball valve for particle operation according to claim 1, characterized in that: Multiple through holes (10) are provided on each throttling orifice plate (9) in the flow channel of the spherical lobe (2), and the through holes (10) of each throttling orifice plate (9) are staggered.

3. The multi-stage pressure-reducing ball valve for particle operation according to claim 1, characterized in that: The upper end of the ball valve (2) is provided with a valve stem groove (13), which is square, rectangular or regular hexagonal; the valve stem groove (13) is matched with the lower end of the valve stem (4).

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