A high pressure regulating valve

Abstract

The application relates to a high-pressure regulating valve which comprises a valve body, a valve cover, a valve rod, a valve seat, a valve sleeve and a valve core; the bottom of the valve body is provided with an inlet, the side end is provided with an outlet, the inner bottom end is provided with a containing groove, the valve seat is arranged in the containing groove, and the valve seat is provided with an inlet channel communicated with the inlet; the valve sleeve is arranged on the upper end of the valve seat, the side end of the valve sleeve is provided with a plurality of outlet holes, the outlet is communicated with a cavity, and the outlet holes are communicated with the cavity; the valve core is slidably arranged in the valve sleeve; the valve cover is detachably connected to the upper end of the valve body, and the upper end of the valve rod is arranged in the valve cover; a sealing structure is arranged between the valve cover and the valve rod; the outlet hole is a special-shaped through hole, and the cross section of the outlet hole is arranged in a flared shape from the inner side to the outer side of the valve sleeve. Through the structure, a small amount of accumulated substances blocked on the outlet hole are automatically washed away by the high-temperature and high-pressure fluid pressure when the valve is opened, the normal use of the valve is restored, the normal operation of the whole process flow is ensured, the accumulated substances can be automatically cleaned, and the self-locking blockage of the outlet hole is prevented.

Description

Technical Field

[0001] This invention relates to the field of industrial valve technology, and specifically to a high-pressure regulating valve. Background Technology

[0002] High-pressure control valves are key actuators in industrial automation control systems. Among them, cage control valves (also known as sleeve control valves) are widely used in high-temperature and high-pressure fluid control applications due to their advantages such as pressure balance, low operating force, customizable flow characteristics, and convenient maintenance.

[0003] When conveying slurries containing solid particles, easily crystallizing, or easily cooling and hardening, the internal flow channels of the regulating valve are prone to blockage. This includes: when the production equipment is shut down for maintenance and the pipeline is cooled down, the slurry remaining in the valve cavity and discharge hole cools and hardens, forming hard lumps. When restarting, conventional fluid pressure alone cannot flush away these lumps, causing the valve to fail to open normally or the flow rate to be severely limited, thus affecting the entire process.

[0004] Therefore, there is an urgent need to provide a high-pressure regulating valve to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings and defects of the prior art and provide a high-pressure regulating valve that uses the high temperature and high pressure of the fluid when the valve is opened to automatically flush away a small amount of accumulated material blocking the discharge port, restore the valve to normal use, ensure the normal operation of the entire process, and can automatically clean up the accumulated material and prevent the discharge port from self-locking and blocking.

[0006] The objective of this invention is achieved through the following technical solution: A high-pressure regulating valve includes a valve body, a valve cover, a valve stem, a valve seat, a valve sleeve, and a valve core. The valve body has an inlet at its bottom and an outlet at its side end communicating with an internal cavity. An internal receiving groove is located at the bottom of the valve body, and the valve seat is situated within the receiving groove, with an inlet channel communicating with the inlet. The valve sleeve is fitted over the upper end of the valve seat, and multiple outlet holes are located at the side end of the valve sleeve. A cavity is formed between the outer side of the valve sleeve and the inner wall of the valve body, with the outlet and outlet holes communicating with the cavity. The valve core is slidably installed within the valve sleeve to block the inlet channel. The valve cover is detachably connected to the upper end of the valve body, and the upper end of the valve stem is installed within the valve cover, with its lower end threadedly connected to the valve core. A sealing structure is provided between the valve cover and the valve stem. The discharge hole is an irregularly shaped through hole with a horizontal upper wall and a downwardly sloping lower wall. The cross-section of the discharge hole is flared from the inside of the valve sleeve to the outside.

[0007] Optionally, the angle between the lower wall of the discharge hole and the horizontal direction is 15° to 45°.

[0008] Optionally, the valve cover includes an upper cover and a lower cover, the upper cover is detachably connected to the upper end of the lower cover, the sealing structure is disposed between the lower cover and the valve stem, and the valve stem passes through the upper cover and the lower cover.

[0009] Optionally, the sealing structure includes a packing assembly and an elastic assembly, a filling cavity is formed between the valve stem and the lower cover, the packing assembly is accommodated in the filling cavity, and the elastic assembly applies an axial preload to the packing assembly.

[0010] Optionally, the sealing structure further includes an annular stop, which is pressed against the lower cover by the upper cover and abuts against the upper end of the packing assembly.

[0011] Optionally, the packing assembly includes a first packing and a second packing; the elastic component includes a movable ring and a spring, the movable ring being sleeved on the outside of the valve stem and abutting against the lower end of the second packing, one end of the spring abutting against the movable ring, and the other end abutting against the support surface of the valve sleeve.

[0012] Optionally, a pressure balancing hole is provided on the valve sleeve above the valve core to balance the pressure on the inner and outer sides of the valve sleeve.

[0013] Optionally, the upper end of the valve seat is provided with a protrusion, and the lower end of the valve sleeve is provided with a groove corresponding to the protrusion. The protrusion and the groove are coaxially arranged with the feed channel.

[0014] Optionally, a first sealing gasket is provided between the valve seat and the receiving groove, a second sealing gasket is provided between the annular block and the lower cover, and a third sealing gasket is provided between the annular block and the upper cover.

[0015] Optionally, the feed channel is funnel-shaped, with the opening on the side near the feed inlet being larger than the opening on the other side; the valve core includes a blocking section, a connecting section, and a sliding section, the blocking section being used for sealing cooperation with the feed channel, the sliding section being slidably connected to the inner wall of the valve sleeve, and the connecting section being connected between the blocking section and the sliding section.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The active anti-deposition effect is significant: the horizontal upper part and the downward inclined irregular structure of the discharge hole give the medium a downward velocity component when it flows out, directly flushing the bottom of the cavity and eliminating the flow dead zone, thus preventing particles from depositing and hardening at the bottom from the source. At the same time, the flared structure with a larger outer part and a smaller inner part avoids the self-locking effect of blockages, and even if there is a small amount of deposit, it is easily washed away by the subsequent fluid.

[0017] High sealing reliability and adaptive compensation: The sealing structure combines a packing assembly with an elastic component. The spring always applies axial preload to the packing, automatically compensating for the volume shrinkage caused by packing wear, thermal aging, and plastic deformation. This maintains stable sealing force over the long term, eliminating the need for frequent manual adjustments. The split valve cover (upper and lower covers) and annular stop design make packing replacement and maintenance more convenient.

[0018] Strong anti-clogging capability of pressure balance hole: The pressure balance hole is set on the valve sleeve to ensure the long-term effectiveness of valve core pressure balance. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0020] Figure 2 for Figure 1 A magnified view of a section AA in the middle.

[0021] Figure 3 for Figure 1 A magnified view of the area at point BB.

[0022] The above figures include the following reference numerals: 1. Valve body; 11. Inlet; 12. Outlet; 13. Receiving groove; 14. Cavity; 21. Upper cover; 22. Lower cover; 221. Filling cavity; 23. Valve stem; 4. Valve seat; 41. Feed channel; 42. Protrusion; 5. Valve sleeve; 51. Outlet hole; 52. Support surface; 53. Pressure balance hole; 54. Groove; 6. Valve core; 61. Sealing section; 62. Connecting section; 63. Sliding section; 71. First packing; 72. Second packing; 73. Annular stop; 74. Moving ring; 75. Spring; 81. First sealing gasket; 82. Second sealing gasket; 83. Third sealing gasket. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0024] The present invention provides a high-pressure regulating valve.

[0025] Reference Figures 1 to 3In this embodiment, the valve body includes: a valve body 1, a valve cover, a valve stem 23, a valve seat 4, a valve sleeve 5, and a valve core 6. The valve body 1 has an inlet 11 at its bottom and an outlet 12 communicating with the internal cavity at its side. The valve body 1 has a receiving groove 13 at its bottom interior. The valve seat 4 is located within the receiving groove 13, and the valve seat 4 has an inlet channel 41 communicating with the inlet 11. The valve sleeve 5 is fitted onto the upper end of the valve seat 4. The valve sleeve 5 has multiple outlet holes 51 at its side. A cavity 14 is formed between the outer side of the valve sleeve 5 and the inner wall of the valve body 1. The outlet 12 communicates with the cavity 14, and the outlet holes 51 communicate with the cavity 14. The valve core 6 is slidably installed within the valve sleeve 5 to block the inlet channel 41. The valve cover is detachably connected to the upper end of the valve body 1. The upper end of the valve stem 23 is installed within the valve cover, and the lower end is threadedly connected to the valve core 6. A sealing structure is provided between the valve cover and the valve stem 23. The discharge hole 51 is an irregularly shaped through hole with a horizontal upper wall and a downwardly sloping lower wall. The cross-section of the discharge hole 51 is flared from the inside to the outside of the valve sleeve 5.

[0026] Optionally, in this embodiment, the high-pressure regulating valve includes a valve body 1, a valve cover, a valve stem 23, a valve seat 4, a valve sleeve 5, and a valve core 6. The valve body 1 has an inlet 11 at its bottom and an outlet 12 at its side end. The outlet 12 communicates with the internal cavity of the valve body 1. The valve body 1 has a receiving groove 13 at its bottom interior end, and the valve seat 4 is disposed within the receiving groove 13. The valve seat 4 has an inlet channel 41 communicating with the inlet 11. The inlet channel 41 is preferably funnel-shaped, with a larger opening on the side near the inlet 11 and a smaller opening on the other side to facilitate stable feeding. The valve sleeve 5 is fitted onto the upper end of the valve seat 4. The side wall of the valve sleeve 5 has multiple outlet holes 51. A cavity 14 is formed between the outer side wall of the valve sleeve 5 and the inner wall of the valve body 1. The outlet 12 communicates with the cavity 14, and each outlet hole 51 communicates with the valve body 1. The cavity 14 is connected, and the valve core 6 is slidably installed inside the valve sleeve 5. The lower end of the valve core 6 is used to block the feed channel 41. The valve cover is detachably connected to the upper end of the valve body 1. The upper end of the valve stem 23 is installed inside the valve cover. The lower end of the valve stem 23 is connected to the valve core 6 by a thread. A sealing structure is provided between the valve cover and the valve stem 23 to prevent the slurry from being exposed from the valve stem 23. The discharge hole 51 is an irregular through hole. Its upper wall is a horizontal plane, that is, the top edge of the discharge hole 51 is perpendicular to the axis of the valve sleeve 5 and is in a horizontal straight line. The lower wall is a downward sloping plane. The bottom edge of the discharge hole 51 gradually slopes downward from the inside to the outside of the valve sleeve 5 to form a slope. The cross-section of the discharge hole 51 gradually increases from the inner wall to the outer wall of the valve sleeve 5, that is, the area of ​​the outer opening is larger than the area of ​​the inner opening. When the valve is opened, liquid slurry is introduced through the inlet 11. The valve stem 23 gradually moves upward, causing the valve core 6 to move upward, opening the feed channel 41. High-pressure slurry enters through the inlet 11, and the degree of lifting and lowering of the valve core 6 determines the opening size of the feed channel 41. After the slurry impacts the bottom of the valve core 6, it turns and enters the valve sleeve 5. The pressure inside the valve sleeve 5 increases. After the valve sleeve 5 is filled with slurry, the slurry flows into the cavity 14 through the outlet 51 and is finally discharged from the outlet 12. During the flow through the outlet 51, due to the downward inclination of the lower wall, the slurry is subjected to a downward force. The force generated by the valve produces a downward velocity component, preventing a large amount of undischarged slurry from accumulating in the discharge hole 51. As the temperature decreases, the slurry hardens and causes blockage in the discharge hole 51. The flared structure makes it difficult for the blockage to form a self-locking blockage in the hole. Even if there is a small amount of hardened clumps, when the device is reused after cooling, the high temperature and high pressure fluid pressure when the valve is opened will automatically flush away and clear the small amount of accumulated material blocking the cavity 14 or the discharge hole 51, thereby restoring the normal use of the valve and ensuring the normal operation of the entire process. It can automatically clean up the accumulated material and prevent the self-locking blockage of the discharge hole 51.

[0027] Optionally, in this embodiment, the angle between the lower wall of the discharge hole 51 and the horizontal direction is 15° to 45°. When the angle is less than 15°, the downward velocity component is too small, and the bottom scouring effect is not obvious, failing to effectively cover the large area at the bottom of the cavity 14. If the angle is greater than 45°, the downward component is too large, which will cause direct impact on a certain area at the bottom of the valve body 1, resulting in severe local erosion. Controlling the angle between 15° and 45° can complete the scouring of the bottom area of ​​the cavity 14, effectively reducing the accumulation and blockage of slurry during cooling.

[0028] Optionally, in this embodiment, the valve cover includes an upper cover 21 and a lower cover 22. The upper cover 21 is detachably connected to the upper end of the lower cover 22 by bolts. The valve stem 23 passes through the upper cover 21 and the lower cover 22. A sealing structure is disposed between the lower cover 22 and the valve stem 23. The split valve cover facilitates inspection and replacement. When maintenance or packing replacement is required, only the upper cover 21 needs to be removed, simplifying maintenance operations. Further, in this embodiment, the sealing structure includes a packing assembly and an elastic assembly. A filling cavity 221 is formed between the valve stem 23 and the lower cover 22. The packing assembly is accommodated in the filling cavity 221. The elastic assembly applies an axial preload to the packing assembly, making the packing assembly tightly fit with the valve stem 23 and the lower cover 22 to form a radial seal. The preload of the elastic assembly can compensate for the volume shrinkage of the packing assembly due to wear, plastic deformation, or thermal aging during long-term use, thereby maintaining stable sealing force. During valve assembly, the elastic component is pre-compressed to apply initial clamping force to the packing assembly, creating an initial seal. During long-term operation, the packing assembly gradually shrinks due to friction, wear, high-temperature aging, and plastic deformation, leading to a decrease in sealing force. At this point, the elastic component automatically releases its stored elastic potential energy, pushing the packing assembly to further compress, compensating for the shrinkage and preventing damage from overpressure or leakage due to loosening.

[0029] Optionally, in this embodiment, the sealing structure further includes an annular stop 73, which is pressed against the upper end face of the lower cover 22 by the upper cover 21, and the lower end of the annular stop 73 abuts against the upper end of the packing assembly; when the upper cover 21 is fastened to the lower cover 22 by bolts, the upper cover 21 presses down on the annular stop 73, and the annular stop 73 then transmits the pressure to the packing assembly. At the same time, the annular stop 73 can also distribute the pressure evenly. Furthermore, in this embodiment, the packing assembly includes a first packing 71 and a second packing 72, where the second packing 72 is the lower packing and the first packing 71 is the upper packing. The first packing 71 and the second packing 72 can be made of different materials; for example, the first packing 71 can be made of flexible graphite, and the second packing 72 can be made of reinforced PTFE, achieving a soft-hard composite seal. The elastic component includes a moving ring 74 and a spring 75. The moving ring 74 is sleeved on the outside of the valve stem 23 and abuts against the lower end of the second packing 72. One end of the spring 75 abuts against the moving ring 74, and the other end abuts against the support surface 52 of the valve sleeve 5. The spring 75 is preferably a cylindrical helical compression spring. Since the spring 75 is in a compressed state, it always pushes the moving ring 74 upward, thereby applying a continuous axial preload to the packing assembly, thus maintaining the sealing effect of the packing assembly. At the same time, the sliding fit between the moving ring 74 and the filling cavity 221 plays an auxiliary guiding role for the valve stem 23, reducing the uneven wear of the packing assembly caused by the swaying of the valve stem 23.

[0030] Optionally, in this embodiment, a pressure balancing hole 53 is provided on the valve sleeve 5 above the valve core 6. The pressure balancing hole 53 connects the inside of the valve sleeve 5 with the cavity 14 and is used to balance the pressure on the upper and lower sides of the valve core 6, thereby reducing the operating force of the valve stem 23. Since the slurry is discharged from the discharge hole 51 into the cavity 14 after the valve core 6 rises, the pressure in the cavity 14 will increase as the discharge port 12 fails to discharge the slurry in time. The pressure balancing hole 53 can balance the pressure in the cavity 14 and the valve sleeve 5, thus ensuring the stability of the feeding.

[0031] Optionally, in this embodiment, the upper end of the valve seat 4 is provided with a protrusion 42, and the lower end of the valve sleeve 5 is provided with a groove 54 corresponding to the protrusion 42. The protrusion 42 and the groove 54 are coaxially arranged with the feed channel 41. This structure can be quickly positioned during assembly, ensuring the coaxiality of the valve core 6 and the feed channel 41, and improving sealing reliability. First, the valve seat 4 is placed into the receiving groove 13 of the valve body 1, and then the valve sleeve 5 is put on from top to bottom, so that the groove 54 is aligned with the protrusion 42 and embedded therein. Due to the cooperation between the protrusion 42 and the groove 54, the valve sleeve 5 is accurately positioned on the valve seat 4, ensuring that the valve sleeve 5 and the feed channel 41 of the valve seat 4 are coaxial. Subsequently, the top of the valve sleeve 5 is pressed by the lower cover 22 to complete the fixation.

[0032] Optionally, in this embodiment, a first sealing gasket 81 is provided between the valve seat 4 and the receiving groove 13 to prevent the medium from leaking from the bottom of the valve seat 4; a second sealing gasket 82 is provided between the annular block 73 and the lower cover 22 to prevent the medium from leaking upward along the valve stem 23 to the mating surface of the upper cover 21 and the lower cover 22. A third sealing gasket 83 is provided between the annular block 73 and the upper cover 21, forming a double seal with the second sealing gasket 82, further improving safety. When the second sealing gasket 82 fails, the third sealing gasket 83 can still play a sealing role; all the above sealing gaskets are made of high temperature and corrosion resistant materials, such as flexible graphite composite gaskets or metal spiral wound gaskets, and are not limited here.

[0033] Optionally, in this embodiment, the feed channel 41 is funnel-shaped, with the opening on the side near the feed inlet 11 being larger than the opening on the other side. When the valve core 6 is opened, the slurry first enters the large-diameter section and then the small-diameter section, ensuring a stable flow rate. The valve core 6 includes a blocking section 61, a connecting section 62, and a sliding section 63. The blocking section 61 is located at the bottom of the valve core 6, and its shape matches the outlet of the feed channel 41 to achieve a sealing fit. The sliding section 63 slides against the inner wall of the valve sleeve 5 for guidance. The connecting section 62 connects the blocking section 61 and the sliding section 63, and its outer diameter is smaller than that of the sliding section 63 to reduce fluid resistance.

[0034] The embodiments described above merely illustrate implementation methods of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A high-pressure regulating valve, characterized in that, The valve includes a valve body, a valve cover, a valve stem, a valve seat, a valve sleeve, and a valve core. The valve body has an inlet at its bottom and an outlet on its side that communicates with an internal cavity. An internal groove is located at the bottom of the valve body, and the valve seat is situated within this groove, with an inlet channel communicating with the inlet. The valve sleeve is fitted over the upper end of the valve seat, and its side has multiple outlet holes. A cavity is formed between the outer side of the valve sleeve and the inner wall of the valve body, with the outlet and outlet holes communicating with the cavity. The valve core is slidably installed within the valve sleeve to block the inlet channel. The valve cover is detachably connected to the upper end of the valve body, and the upper end of the valve stem is installed within the valve cover, while its lower end is threadedly connected to the valve core. A sealing structure is provided between the valve cover and the valve stem. The discharge hole is an irregularly shaped through hole with a horizontal upper wall and a downwardly sloping lower wall. The cross-section of the discharge hole is flared from the inside of the valve sleeve to the outside.

2. A high-pressure regulating valve according to claim 1, characterized in that, The angle between the lower wall of the discharge hole and the horizontal direction is 15°~45°.

3. A high-pressure regulating valve according to claim 1, characterized in that, The valve cover includes an upper cover and a lower cover. The upper cover is detachably connected to the upper end of the lower cover. The sealing structure is located between the lower cover and the valve stem, and the valve stem passes through the upper cover and the lower cover.

4. A high-pressure regulating valve according to claim 3, characterized in that, The sealing structure includes a packing assembly and an elastic assembly. A filling cavity is formed between the valve stem and the lower cover. The packing assembly is accommodated in the filling cavity. The elastic assembly applies an axial preload to the packing assembly.

5. A high-pressure regulating valve according to claim 4, characterized in that, The sealing structure also includes an annular stop, which is pressed against the lower cover by the upper cover and abuts against the upper end of the packing assembly.

6. A high-pressure regulating valve according to claim 5, characterized in that, The packing assembly includes a first packing and a second packing; the elastic component includes a movable ring and a spring, the movable ring is sleeved on the outside of the valve stem and abuts against the lower end of the second packing, one end of the spring abuts against the movable ring and the other end abuts against the support surface of the valve sleeve.

7. A high-pressure regulating valve according to claim 1, characterized in that, A pressure balancing hole is provided on the valve sleeve above the valve core to balance the pressure on the inside and outside of the valve sleeve.

8. A high-pressure regulating valve according to claim 1, characterized in that, The valve seat has a protrusion at its upper end and a groove at its lower end that corresponds to the protrusion. The protrusion and the groove are coaxially arranged with the feed channel.

9. A high-pressure regulating valve according to claim 5, characterized in that, A first sealing gasket is provided between the valve seat and the receiving groove, a second sealing gasket is provided between the annular block and the lower cover, and a third sealing gasket is provided between the annular block and the upper cover.

10. A high-pressure regulating valve according to claim 1, characterized in that, The feed channel is funnel-shaped, with the opening on the side near the feed inlet being larger than the opening on the other side; the valve core includes a blocking section, a connecting section, and a sliding section. The blocking section is used to seal with the feed channel, the sliding section is slidably connected to the inner wall of the valve sleeve, and the connecting section is connected between the blocking section and the sliding section.

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