A choke regulating valve with a flow guide

Abstract

The utility model discloses a cutoff throttling regulating valve door with fairlead, it relates to valve technical field, aims at solving the problem that the existing cutoff, throttling, regulating valve door has the internal valve clack sealing surface easy to be high pressure medium erosion damage, causes the short service life of valve condition, its technical scheme main points include the valve body and support, the inside of valve body is provided with lower valve rod, the inboard of support is provided with upper valve rod, the valve body and support are fixedly connected through connecting nut, connecting bolt, the inboard of support is installed with valve rod nut, the valve rod is in the middle position place of valve rod nut and is penetrated, one end of lower valve rod is provided with valve clack, and the one end rim of valve clack is provided with the inclined sealing surface, and one end of upper valve rod is fixedly installed with handle through lock nut. Reach the effect that can high pressure medium carries out the operation of guiding, avoids high pressure medium to valve clack sealing surface and causes the erosion damage, improves the service life of valve whole, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a shut-off throttling regulating valve with a flow guide cover. Background Technology

[0002] In existing pipelines used in petroleum, chemical, power, and military industries, valves such as gate valves, throttle valves, and regulating valves are mostly structured by bolts and nuts connecting the valve body, support, stuffing box, and spiral wound gasket into one unit. The lower valve stem passes through the stuffing box and packing, and is connected to the upper valve stem via a coupling. Pressure plate bolts and nuts tighten the pressure plate, pressure sleeve, and packing assembly, achieving a seal between the lower valve stem and the stuffing box orifice. The upper valve stem passes through its own thread through a valve stem nut mounted on the top of the support. The upper end of the upper valve stem is tapered and square, engaging with a handle (or handwheel) mounted on it, and is secured with a nut. Rotating the handle (handwheel) achieves valve opening / closing, throttling, and regulation.

[0003] Existing shut-off, throttling, and regulating valves suffer from a short service life due to the internal valve disc sealing surface being easily eroded and damaged by high-pressure media. Utility Model Content

[0004] The purpose of this invention is to provide a shut-off throttling regulating valve with a flow guide cover that can guide high-pressure media, avoid erosion damage to the valve disc sealing surface caused by high-pressure media, improve the overall service life of the valve, and is highly practical.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A shut-off valve with a flow guide includes a valve body and a bracket. A lower valve stem is disposed inside the valve body, and an upper valve stem is disposed inside the bracket. The valve body and the bracket are fixedly connected by a connecting nut and connecting bolts. A valve stem nut is installed inside the bracket, and the valve stem passes through the middle of the valve stem nut. A valve disc is disposed at one end of the lower valve stem, and an inclined sealing surface is disposed at one edge of the valve disc. A handle is fixedly installed at one end of the upper valve stem by a locking nut. A lower valve stem concave surface is disposed on the end face of the lower valve stem, and an upper valve stem convex surface is disposed on the end face of the upper valve stem, with the convex surface of the upper valve stem engaging with the concave surface of the lower valve stem. A flow guide is disposed on the end face of the valve disc, and multiple conical diversion holes with larger inner diameters and smaller outer diameters are disposed on the side surface of the flow guide.

[0006] By adopting the above technical solution, the high-pressure medium flowing inside the gate valve can be effectively guided, avoiding erosion damage to the valve disc sealing surface inside the gate valve caused by the high-pressure medium, and improving the service life of the gate valve.

[0007] Furthermore, a stuffing box is provided inside the valve body, and the stuffing box is filled with combined packing. A sealing groove is provided on the end face of the valve body, and a sealing gasket is installed inside the sealing groove. One end of the stuffing box is inserted into the lower valve stem mounting hole of the valve body. A packing pressure plate is provided inside the bracket, and the packing pressure plate is fixedly connected by pressure plate bolts and nuts. A packing sleeve is sleeved on the outside of the lower valve stem. One end of the packing sleeve abuts against the outer surface of the stuffing box, and the other end of the packing sleeve abuts against the outer surface of the packing pressure plate.

[0008] By adopting the above technical solution, the erosion damage to the inner circle of the gasket caused by the high-pressure medium can be avoided, thereby improving the service life of the gasket and thus the service life of the valve.

[0009] Furthermore, two mating anti-rotation coupling blocks are installed at the connection between the upper valve stem and the lower valve stem. Multiple anti-rotation coupling fastening screw holes are provided on the outer surface of the anti-rotation coupling block. An upper valve stem spherical protrusion is provided on the outer surface of the convex surface of the upper valve stem, and a lower valve stem annular groove is provided on the inner wall of the concave surface of the lower valve stem.

[0010] By adopting the above technical solution, the rotation of the lower valve stem can be avoided when the upper and lower valve stems are linked inside the valve, thereby preventing the valve disc from rotating, avoiding wear on the sealing surface, and improving the service life of the valve.

[0011] A throttling valve with a flow guide includes a valve body, a lower valve stem, and a valve disc. A flow guide is provided on the end face of the valve disc, and a plurality of throttling and diverting holes are provided on the outer surface of the flow guide.

[0012] By adopting the above technical solution, the high-pressure medium inside the throttling valve can be guided, avoiding the high-pressure medium from eroding and damaging the sealing surface of the valve disc inside the throttling valve, thus improving the service life of the throttling valve.

[0013] A regulating valve with a flow guide includes a valve disc, on the end face of which a primary flow guide and a secondary flow guide are provided. The primary flow guide is sleeved on the outside of the secondary flow guide. The outer surface of the primary flow guide is provided with a plurality of primary throttling adjustment holes, and the outer surface of the secondary flow guide is provided with a plurality of secondary throttling adjustment holes.

[0014] By adopting the above technical solution, the high-pressure medium flowing inside the regulating valve is prevented from eroding and damaging the sealing surface of the valve disc, thereby improving the service life of the regulating valve.

[0015] Furthermore, multiple annular throttling holes are provided between the primary flow guide and the secondary flow guide.

[0016] By adopting the above technical solution, it is possible to effectively guide the high-pressure medium flowing inside the regulating valve.

[0017] In summary, the beneficial technical effects of this utility model are as follows: This invention provides a flow guide shroud on the end face of the valve disc inside a stop valve, a flow guide shroud on the end face of the valve disc inside a throttle valve, and a first-stage and a second-stage flow guide shroud on the end face of the valve disc inside a regulating valve. A flow diversion hole is provided on the flow guide shroud. This allows for the guidance of the internal flowing medium during valve operation, preventing high-pressure media and media containing small particles from impacting the sealing surface during valve opening and closing, thus avoiding erosion and damage to the valve disc's sealing surface and effectively improving the valve's service life. This utility model provides a sealing groove on the end face of the valve body, installs a sealing gasket inside the sealing groove, and inserts one end of the stuffing box into the mounting hole of the valve body. The inner circle of the sealing gasket does not come into contact with the medium. This prevents the medium from filling and damaging the sealing gasket during valve use, thereby preventing damage to the sealing structure and effectively improving the sealing performance and service life of the valve during operation. This utility model, by adjusting the existing coupling body, coupling collar, and coupling anti-loosening spring structure to an anti-rotation coupling half-piece, upper valve stem spherical protrusion, and lower valve stem annular groove structure, can prevent the lower valve stem from rotating with the upper valve stem when the valve disc sealing surface contacts the valve seat sealing surface due to excessive closing force or inflexible rotation of the upper valve stem convex surface and lower valve stem concave surface. This avoids damage to the valve disc sealing surface, valve failure, increased labor intensity for maintenance personnel, and economic losses for the enterprise. Attached Figure Description

[0018] Figure 1 This is a diagram showing the internal structure of the shut-off valve and throttle valve of this utility model. Figure 2 This is a diagram showing the internal structure of the regulating valve of this utility model; Figure 3 This is a structural diagram of the prior art of the shut-off valve of this utility model; Figure 4 This utility model Figure 1 Enlarged view of point A1 on the shut-off valve; Figure 5 This is a structural diagram of the prior art throttle valve of this utility model; Figure 6 This utility model Figure 1 Enlarged view of section A1 of the throttle valve; In the diagram: 1. Valve body; 2. Valve disc; 3. Lower valve stem; 4. Flow guide; 5. Diverter orifice; 6. Packing box; 7. Packing sleeve; 8. Connecting nut; 9. Connecting bolt; 10. Bracket; 11. Upper valve stem; 12. Valve stem nut; 13. Handle; 14. Anti-rotation coupling block; 15. Anti-rotation coupling fastening screw hole; 16. Throttling fluid; 17. Sealing gasket; 18. Sealing groove; 19. Primary throttling adjustment orifice; 20. Packing pressure plate; 21. Pressure plate bolt and nut; 2. Secondary flow guide; 23. Secondary throttling adjustment hole; 24. Annular throttling hole; 25. Lower valve stem concave surface; 26. Upper valve stem convex surface; 27. Coupling body; 28. Coupling collar; 29. ​​Coupling anti-loosening snap ring; 30. Upper valve stem spherical protrusion; 31. Lower valve stem annular groove; 32. Sealing surface; 33. Anti-rotation coupling half piece; 34. Coupling fastening screw hole; 35. Locking nut; 36. Combined packing; 37. Throttling and diverting hole; 38. Primary flow guide. Detailed Implementation

[0019] The method of this utility model will be further described in detail below with reference to the accompanying drawings. Example

[0020] Reference Figure 1 , Figure 3 , Figure 4 A shut-off valve with a flow guide includes a valve body 1 and a bracket 10. A lower valve stem 3 is disposed inside the valve body 1, and an upper valve stem 11 is disposed inside the bracket 10. The valve body 1 and the bracket 10 are fixedly connected by a connecting nut 8 and a connecting bolt 9. A valve stem nut 12 is installed inside the bracket 10, and the valve stem 11 passes through the middle of the valve stem nut 12. A valve disc 2 is disposed at one end of the lower valve stem 3, and an inclined sealing surface 32 is disposed at one edge of the valve disc 2. A handle 13 is fixedly installed at one end of the upper valve stem 11 by a locking nut 35. A lower valve stem concave surface is disposed on the end face of the lower valve stem 3. 25. An upper valve stem convex surface 26 is provided on the end face of the upper valve stem 11. The upper valve stem convex surface 26 and the lower valve stem concave surface 25 are engaged. A flow guide shroud 4 is provided on the end face of the valve disc 2. Multiple conical diversion holes 5 with larger inner diameters and smaller outer diameters are provided on the side surface of the flow guide shroud 4. The flow guide holes 5 on the flow guide shroud 4 can be used to guide the high-pressure medium flowing inside the valve body 1 and some media containing small particles. This prevents the high-pressure medium from eroding and damaging the sealing surface 32 of the valve disc 2 during the opening and closing of the valve. This effectively protects the valve disc 2 and thus effectively improves the service life of the entire valve.

[0021] Reference Figure 1A stuffing box 6 is provided inside the valve body 1, and the stuffing box 6 is filled with combined packing 36. A sealing groove 18 is provided on the end face of the valve body 1, and a sealing gasket 17 is installed inside the sealing groove 18. One end of the stuffing box 6 is inserted into the mounting hole of the lower valve stem 3 of the valve body 1. A packing pressure plate 20 is provided inside the bracket 10, and the packing pressure plate 20 is fixedly connected by pressure plate bolts and nuts 21. A packing sleeve 7 is sleeved on the outside of the lower valve stem 3. One end of the packing sleeve 7 abuts against the outer surface of the stuffing box 6, and the other end of the packing sleeve 7 abuts against the outer surface of the packing pressure plate 20. In the prior art, the high-pressure medium flowing inside the valve body 1 directly contacts the inner circle of the sealing gasket 17. The high-pressure medium is prone to erosion damage to the inner circle surface of the sealing gasket 17, which damages the overall structure of the sealing gasket 17 and causes the valve to no longer seal. By improving the stuffing box 6, one end of the stuffing box 6 can be placed in the through hole of the valve body 1, avoiding contact between the medium and the sealing gasket 17, thereby preventing the sealing gasket 17 from being eroded and damaged.

[0022] Reference Figure 1 In the prior art, the connection between the upper valve stem 11 and the lower valve stem 3 relies on two mating semi-cylindrical coupling bodies 27. A coupling collar 28 is sleeved on the outside of the two mating semi-cylindrical coupling bodies 27. To prevent loosening, a coupling release spring 29 is engaged at one end of the coupling collar 28. When the valve is closed, due to excessive closing force or inflexible rotation of the upper valve stem convex surface 26 and the lower valve stem concave surface 25, the lower valve stem 3 will rotate with the upper valve stem 11 when the sealing surface 32 of the valve disc 2 contacts the sealing surface of the valve seat 1. This causes damage to the sealing surface 32 of the valve disc 2, resulting in valve failure. It also increases the labor intensity of maintenance personnel and causes economic losses to the enterprise.

[0023] Reference Figure 1 Two mating anti-rotation coupling blocks 14 are installed at the connection between the upper valve stem 11 and the lower valve stem 3. Multiple anti-rotation coupling fastening screw holes 15 are provided on the outer surface of the anti-rotation coupling block 14. The upper valve stem spherical protrusion 30 is provided on the outer surface of the upper valve stem convex surface 26, and the lower valve stem annular groove 31 is provided on the inner wall of the lower valve stem concave surface 25. The anti-rotation coupling block 14, the upper valve stem spherical protrusion 30, and the lower valve stem annular groove 31 replace the existing coupling body 27 and coupling collar 28 structure. When the valve is closed, the upper valve stem 11 is prevented from driving the lower valve stem 3 to rotate, thereby preventing the valve disc 2 from rotating. This effectively improves the overall sealing performance and service life. Example

[0024] Reference Figure 1 , Figure 6A throttling valve with a flow guide shroud includes a valve body 1, a lower valve stem 3, and a valve disc 2. A flow guide shroud 4 is provided on the end face of the valve disc 2, and multiple throttling and diverting holes 37 are provided on the outer surface of the flow guide shroud 4. The high-pressure medium flowing inside the valve body 1 is guided through the throttling and diverting holes 37, which prevents the high-pressure medium inside the throttling valve from causing erosion damage to the sealing surface 32 of the valve disc 2 inside the throttling valve, and effectively improves the service life of the throttling valve.

[0025] Reference Figure 5 The existing throttling valve has a throttling fluid 16 on the end face of the valve disc 2. The throttling fluid 16 is conical. During throttling, the flow gap between the throttling fluid 16 and the valve body 1 will cause the medium to erode and damage the sealing surface 32 of the valve disc 2 at a higher flow rate.

[0026] Reference Figure 1 The internal sealing structure of the throttle valve is the same as that of the shut-off valve.

[0027] Reference Figure 1 The stem coupling structure inside the throttle valve is the same as that inside the stop valve. Example

[0028] Reference Figure 2 A regulating valve with a flow guide shroud includes a valve disc 2. A primary flow guide shroud 38 and a secondary flow guide shroud 22 are provided on the end face of the valve disc 2. The primary flow guide shroud 38 is sleeved on the outside of the secondary flow guide shroud 22. Multiple primary throttling adjustment holes 19 are provided on the outer surface of the primary flow guide shroud 38, and multiple secondary throttling adjustment holes 23 are provided on the outer surface of the secondary flow guide shroud 22. Multiple annular throttling holes 24 are provided between the primary flow guide shroud 38 and the secondary flow guide shroud 22. Through the arrangement of the primary flow guide shroud 38 and the secondary flow guide shroud 22, the high-pressure medium can first pass through the secondary throttling adjustment holes 23 of the secondary flow guide shroud 22 and then enter the interior of the annular throttling holes 24. Under the guidance of the annular throttling holes 24, the high-pressure medium flows out from the primary throttling adjustment holes 19 on the primary flow guide shroud 4, avoiding the erosion and damage of the sealing surface 32 on the valve disc 2 inside the regulating valve by the high-pressure medium, which can effectively improve the sealing performance and service life of the regulating valve.

[0029] Reference Figure 2 The internal sealing structure of the regulating valve is the same as that of the shut-off valve.

[0030] Reference Figure 2 The stem coupling structure inside the regulating valve is the same as that inside the shut-off valve.

[0031] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A shut-off throttling valve with a flow guide, comprising a valve body (1) and a bracket (10), wherein a lower valve stem (3) is disposed inside the valve body (1), and an upper valve stem (11) is disposed inside the bracket (10), the valve body (1) and the bracket (10) are fixedly connected by a connecting nut (8) and a connecting bolt (9), a valve stem nut (12) is installed inside the bracket (10), and the valve stem (11) passes through the middle position of the valve stem nut (12). A valve disc (2) is provided at one end of the lower valve stem (3), and an inclined sealing surface (32) is provided at one edge of the valve disc (2). A handle (13) is fixedly installed at one end of the upper valve stem (11) by a locking nut (35). A lower valve stem concave surface (25) is provided on the end face of the lower valve stem (3), and an upper valve stem convex surface (26) is provided on the end face of the upper valve stem (11). The upper valve stem convex surface (26) and the lower valve stem concave surface (25) are aligned. The feature is that: A flow guide shroud (4) is provided on the end face of the valve disc (2), and a plurality of cone-shaped diversion holes (5) with larger inner diameter and smaller outer diameter are provided on the side surface of the flow guide shroud (4).

2. A shut-off throttling valve with a flow guide according to claim 1, characterized in that: A stuffing box (6) is provided on the inner side of the valve body (1). The stuffing box (6) is filled with combined packing (36). A sealing groove (18) is provided on the end face of the valve body (1). A sealing gasket (17) is installed inside the sealing groove (18). One end of the stuffing box (6) is inserted into the mounting hole of the lower valve stem (3) of the valve body (1). A packing pressure plate (20) is provided inside the bracket (10). The packing pressure plate (20) is fixedly connected by a pressure plate bolt and nut (21). A packing sleeve (7) is sleeved on the outside of the lower valve stem (3). One end of the packing sleeve (7) abuts against the outer surface of the stuffing box (6), and the other end of the packing sleeve (7) abuts against the outer surface of the packing pressure plate (20).

3. A shut-off throttling valve with a flow guide according to claim 1, characterized in that: Two mating anti-rotation coupling blocks (14) are installed at the connection between the upper valve stem (11) and the lower valve stem (3). Multiple anti-rotation coupling fastening screw holes (15) are provided on the outer surface of the anti-rotation coupling block (14). An upper valve stem spherical protrusion (30) is provided on the outer surface of the upper valve stem convex surface (26). A lower valve stem annular groove (31) is provided on the inner wall of the lower valve stem concave surface (25).

4. A shut-off throttling valve with a flow guide according to claim 1, characterized in that: A flow guide shroud (4) is provided on the end face of the valve disc (2), and a plurality of throttling and diversion holes (37) are provided on the outer surface of the flow guide shroud (4).

5. A regulating valve with a flow guide, comprising a valve disc (2), characterized in that: The valve disc (2) is provided with a primary flow guide (38) and a secondary flow guide (22) on its end face. The primary flow guide (38) is sleeved on the outside of the secondary flow guide (22). The outer surface of the primary flow guide (38) is provided with a plurality of primary throttling adjustment holes (19), and the outer surface of the secondary flow guide (22) is provided with a plurality of secondary throttling adjustment holes (23).

6. A regulating valve with a flow guide according to claim 5, characterized in that: Multiple annular throttling holes (24) are provided between the primary flow guide (38) and the secondary flow guide (22).

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