V-shaped flange type ball valve

Abstract

The V-shaped flange type ball valve comprises a valve body, a support, an actuator, an upper valve rod, a lower valve rod, a ball body, a bottom cover and a valve seat, the two ends of the upper end of the ball body are in linkage connection with the upper valve rod and the lower valve rod respectively, the support is installed at the upper end of the valve body, the bottom cover is installed at the position, corresponding to the lower end of a lower shaft hole, of the valve body in a sealed mode, and the valve seat is installed in the ball body; a bottom supporting assembly is further included and comprises a supporting shaft and an adjusting nut, a cylindrical cavity is formed in the position, corresponding to the lower end of the lower shaft hole, of the valve body, the supporting shaft is arranged in the cylindrical cavity, and a first sealing ring used for being in sealing fit with the inner circle face of the cylindrical cavity is installed on the outer circle face of the supporting shaft. A screw hole is axially formed in the bottom cover in a penetrating mode, the adjusting nut is in threaded connection in the screw hole, and the upper end and the lower end of the supporting shaft abut against the lower end of the lower valve rod and the upper end of the adjusting nut respectively. The bottom support of the lower valve rod is adjustable, the lower valve rod or the bottom cover does not need to be replaced frequently, maintenance operation is convenient, and cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a V-shaped flange ball valve. Background Art

[0002] The V-shaped ball valve is a trunnion-mounted, single-seat sealed ball valve. It offers the best adjustment performance among ball valves, with an equal percentage flow characteristic and an adjustable ratio of 100:1. The shearing action between the V-shaped cutout and the metal seat makes it particularly suitable for media containing fibers, fine solid particles, and slurries.

[0003] For example, the utility model patent with patent application number CN201821663959.3 discloses an equal percentage V-type regulating ball valve, which includes a valve body, a ball, an upper valve stem rotatably connected to the top of the valve body, and a lower valve stem rotatably connected to the bottom of the valve body. The ball is fixed between the upper valve stem and the lower valve stem, and the bottom of the lower valve stem is sealed by a bottom cover. However, during long-term use of this structure, friction will occur between the lower end face of the lower valve stem and the upper end face of the bottom cover, causing a slight axial deviation of the ball, which will lead to problems such as increased local friction between other parts such as the ball and the valve seat and decreased sealing performance. Therefore, the lower valve stem or the bottom cover needs to be replaced after a period of use, which is costly and troublesome to maintain. Utility Model Content

[0004] The purpose of the utility model is to provide a V-shaped flange ball valve. The bottom support of the lower valve stem of the utility model is adjustable, and there is no need to frequently replace the lower valve stem or the bottom cover. The maintenance operation is convenient and the cost is low.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a V-shaped flange ball valve, comprising a valve body, a bracket, an actuator, an upper valve stem, a lower valve stem, a ball, a bottom cover and a valve seat, wherein the upper and lower ends of the valve body are respectively provided with an upper shaft hole and a lower shaft hole, the upper valve stem and the lower valve stem are respectively passed through the upper shaft hole and the lower shaft hole, the ball is arranged in the valve body, and the upper ends of the ball are respectively linked to the upper valve stem and the lower valve stem, the bracket is mounted on the upper end of the valve body, the actuator is mounted on the bracket, and the output end of the actuator is linked to the upper valve stem, and the bottom cover is sealed and mounted on the corresponding lower shaft of the valve body. The valve seat is installed in the sphere and is used to form a sealing fit with the sphere when the valve is closed; it also includes a bottom support assembly, the bottom support assembly includes a support shaft and an adjusting nut, the valve body is provided with a cylindrical cavity at the position corresponding to the lower end of the lower shaft hole, the support shaft is arranged in the cylindrical cavity, and a first sealing ring is installed on the outer circular surface of the support shaft for forming a sealing fit with the inner circular surface of the cylindrical cavity, a screw hole is provided axially through the bottom cover, the adjusting nut is threadedly connected to the screw hole, and the upper and lower ends of the support shaft are respectively tightly pressed against the lower end of the lower valve stem and the upper end of the adjusting nut.

[0006] By adopting the above technical solution, when the end face of the lower valve stem is worn, the adjusting nut can be rotated to drive the support shaft to move axially upward to make up for the gap between the lower valve stem and the support shaft caused by wear, thereby achieving the purpose of frequent replacement of the lower valve stem, and the maintenance operation is convenient and low-cost.

[0007] The present invention is further configured such that a hexagonal groove is provided at the center of the lower end of the adjusting nut.

[0008] By adopting the above technical solution, the adjusting nut can be rotated by using a hexagonal wrench, and the operation is easy and convenient.

[0009] The utility model is further configured such that a locking nut is threadedly connected in the screw hole, the locking nut is tightly pressed against the lower end of the adjusting nut, and a hexagonal hole is provided at the center of the locking nut, the area of ​​the hexagonal hole being larger than the area of ​​the hexagonal groove.

[0010] By adopting the above technical solution, after the adjusting nut is rotated to the appropriate position, the anti-loosening nut is rotated to press against the adjusting nut, thereby increasing the thread friction between the adjusting nut and the screw hole, thereby preventing the adjusting nut from loosening, and the structure is more reliable. The design of the hexagonal hole area being larger than the hexagonal slot area supports the separate adjustment of the two nuts.

[0011] The utility model is further configured such that the lower end of the lower valve stem is provided with a limiting flange extending toward the outer periphery, the outer diameter of the limiting flange is smaller than the inner diameter of the cylindrical cavity, a washer is sandwiched between the upper end of the limiting flange and the upper end of the cylindrical cavity, and a gasket is provided between the limiting flange and the support shaft.

[0012] By adopting the above technical solution, the end face friction of the lower valve stem can be reduced, which plays a role in protecting the lower valve stem. It can not only reduce the number of maintenance times but also increase the service life of the lower valve stem.

[0013] The present invention is further configured such that an upper shaft sleeve for sleeved on the outer periphery of the upper valve stem is installed in the upper shaft hole, and a lower shaft sleeve for sleeved on the outer periphery of the lower valve stem is installed in the lower shaft hole.

[0014] By adopting the above technical solution, the friction on the outer periphery of the upper valve stem and the lower valve stem can be reduced, thereby further improving their service life.

[0015] The utility model is further configured such that a pressure ring is installed on the end face of the valve body through a fastener, the valve seat can be axially slidably arranged in the flow channel of the valve body, and a second sealing ring for sealing with the inner wall of the valve body is provided on the outer circular surface of the valve seat, a plurality of spring grooves are provided on one end of the valve seat close to the pressure ring, a pre-tightening spring is provided in the spring groove, the outer end of the pre-tightening spring is tightly pressed against the end of the pressure ring close to the valve seat, so that the end of the valve seat close to the sphere is tightly pressed against the surface of the sphere.

[0016] By adopting the above technical solution and designing a floating valve seat structure, the valve seat can always be pressed against the ball, so that the valve seat will not be separated from the ball, and the sealing is more reliable.

[0017] The utility model is further configured as follows: a plurality of guide holes are circumferentially provided on the pressure ring, the number of which is equivalent to the spring groove; a threaded groove is provided on the outer end of the guide hole, a hexagonal stud is threadedly connected to the inner thread of the threaded groove, an adjusting column is axially slidably provided in the guide hole, a third sealing ring is installed on the outer circular surface of the adjusting column for forming a sealing fit with the inner circular surface of the guide hole, one end of the adjusting column extends into the corresponding spring groove and is tightly pressed against the preloaded spring, and the other end of the adjusting column extends into the corresponding threaded groove and is tightly pressed against the inner end of the hexagonal stud.

[0018] By adopting the above technical solution, the axial position of the adjustment column is changed by rotating the hexagonal screw, thereby changing the compression amount of the preload spring, thereby facilitating the adjustment of the initial preload force of the preload spring.

[0019] The utility model is further configured such that a plurality of pressure-stabilizing grooves extending in the axial direction are provided on the outer circular surface of the regulating column, a floating gap is provided between the pressure ring and the valve seat, and the pressure-stabilizing grooves connect the floating gap with the corresponding spring grooves.

[0020] By adopting the above technical solution, when the adjusting column moves axially, the pressure in the spring groove can be kept stable through the pressure stabilizing groove, thereby ensuring that the adjusting column can move smoothly in the axial direction.

[0021] The utility model is further configured such that a sealing gasket is sandwiched between the pressure ring and the valve body, and the inner circumferential surface of the sealing gasket is in contact with the outer circumferential surface of the valve seat.

[0022] By adopting the above technical solution, the sealing between the pressure ring and the valve body and between the valve seat and the inner wall of the valve body can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0025] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part B in the middle.

[0026] In the figure: 1. Valve body; 2. Bracket; 3. Actuator; 4. Upper valve stem; 5. Lower valve stem; 6. Ball; 7. Bottom cover; 8. Valve seat; 9. Upper shaft hole; 10. Lower shaft hole; 11. Bottom support assembly; 12. Support shaft; 13. Adjusting nut; 14. Cylindrical cavity; 15. First sealing ring; 16. Screw hole; 17. Hexagon socket groove; 18. Lock nut; 19. Limiting flange; 20. Washer; 21. Gasket; 22. Upper sleeve; 23. Lower sleeve; 24. Pressing ring; 25. Second sealing ring; 26. Spring groove; 27. Preload spring; 28. Guide hole; 29. ​​Threaded groove; 30. Hexagon socket stud; 31. Adjusting column; 32. Third sealing ring; 33. Pressure stabilizing groove; 34. Floating gap; 35. Sealing gasket; 36. Hexagon socket hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: As shown in the attached Figures 1 to 3The V-shaped flange ball valve shown includes a valve body 1, a bracket 2, an actuator 3, an upper valve stem 4, a lower valve stem 5, a ball 6, a bottom cover 7 and a valve seat 8. The upper and lower ends of the valve body 1 are respectively provided with an upper shaft hole 9 and a lower shaft hole 10. The upper valve stem 4 and the lower valve stem 5 are respectively penetrated into the upper shaft hole 9 and the lower shaft hole 10. The ball 6 is arranged in the valve body 1, and the upper ends of the ball 6 are respectively linked to the upper valve stem 4 and the lower valve stem 5. Specifically, the upper and lower ends of the ball 6 are respectively provided with sockets for inserting the lower end of the upper valve stem 4 and the upper end of the lower valve stem 5, and the upper valve stem 4 is fixed by a pin after being inserted into the socket, and the lower valve stem 5 is fixed by a pin after being inserted into the socket. The bracket 2 is mounted on the upper end of the valve body 1 by screws, the actuator 3 is mounted on the bracket 2, and the output end of the actuator 3 is linked to the upper valve stem 4. The bottom cover 7 is installed in the position of the lower end of the lower shaft hole 10 of the valve body 1 through a screw seal, and the valve seat 8 is installed in the ball 6 to form a sealing fit with the ball 6 when the valve is closed; the V-shaped flange ball valve also includes a bottom support assembly 11, the bottom support assembly 11 includes a support shaft 12 and an adjusting nut 13, a cylindrical cavity 14 is provided at the position of the lower end of the lower shaft hole 10 of the valve body 1, the support shaft 12 is arranged in the cylindrical cavity 14, and a first sealing ring 15 is installed on the outer circumferential surface of the support shaft 12 to form a sealing fit with the inner circumferential surface of the cylindrical cavity 14, a screw hole 16 is axially penetrated on the bottom cover 7, the adjusting nut 13 is threadedly connected to the screw hole 16, and the upper and lower ends of the support shaft 12 are respectively tightly pressed against the lower end of the lower valve stem 5 and the upper end of the adjusting nut 13. When the end face of the lower valve stem 5 is worn, the adjusting nut 13 can be rotated to drive the support shaft 12 to move axially upward to make up for the gap between the lower valve stem 5 and the support shaft 12 caused by wear, thereby achieving the purpose of frequently replacing the lower valve stem 5, and the maintenance operation is convenient and low-cost.

[0029] As attached Figure 2 As shown, the lower center of the adjusting nut 13 is provided with an inner hexagonal groove 17. The adjusting nut 13 can be rotated by an inner hexagonal wrench, and the operation is easy and convenient.

[0030] As attached Figure 2 As shown, a lock nut 18 is threadedly connected to the screw hole 16, and the lock nut 18 is tightly abutted against the lower end of the adjusting nut 13. A hexagonal hole 36 is formed at the center of the lock nut 18, and the area of ​​the hexagonal hole 36 is larger than the area of ​​the hexagonal slot 17. After the adjusting nut 13 is rotated to the appropriate position, the lock nut 18 is rotated to press against the adjusting nut 13, thereby increasing the thread friction between the adjusting nut 13 and the screw hole 16, thereby preventing the adjusting nut 13 from loosening, making the structure more reliable. The design of the hexagonal hole 36 having a larger area than the hexagonal slot 17 supports the independent adjustment of the two nuts.

[0031] As attached Figure 2 As shown, the lower end of the lower valve stem 5 is provided with a limiting flange 19 extending toward the outer circumference. The outer diameter of the limiting flange 19 is smaller than the inner diameter of the cylindrical cavity 14. A washer 20 is sandwiched between the upper end of the limiting flange 19 and the upper end of the cylindrical cavity 14. A gasket 21 is provided between the limiting flange 19 and the support shaft 12. This design can reduce end face friction of the lower valve stem 5 and protect the lower valve stem 5, thereby reducing maintenance frequency and increasing the service life of the lower valve stem 5.

[0032] As attached Figure 1 As shown, an upper shaft sleeve 22 for sleeved around the outer periphery of the upper valve stem 4 is installed in the upper shaft hole 9. Specifically, a first limiting step is provided in the upper shaft hole 9. The upper end of the upper shaft sleeve 22 abuts against the packing provided on the upper part of the valve body 1, and the lower end of the upper shaft sleeve 22 abuts against the first limiting step. A lower shaft sleeve 23 for sleeved around the outer periphery of the lower valve stem 5 is installed in the lower shaft hole 10. Specifically, a second limiting step is provided in the lower shaft hole 10. The upper end of the lower shaft sleeve 23 abuts against the second limiting step, and the lower end of the lower shaft sleeve 23 abuts against the washer 20. This design can reduce friction on the outer periphery of the upper valve stem 4 and the lower valve stem 5, thereby further improving their service life.

[0033] As attached Figure 3 As shown, a pressing ring 24 is mounted on the end face of the valve body 1 via fasteners (screws). The valve seat 8 is axially slidably disposed within the flow passage of the valve body 1 , and a second sealing ring 25 is provided on the outer circumferential surface of the valve seat 8 for sealing against the inner wall of the valve body 1 . Multiple spring slots 26 are defined on the end of the valve seat 8 near the pressing ring 24 . Preload springs 27 are disposed within the spring slots 26 . The outer ends of the preload springs 27 abut against the end of the pressing ring 24 near the valve seat 8 , causing the end of the valve seat 8 near the ball 6 to abut against the surface of the ball 6 . The design of a floating valve seat 8 structure ensures that the valve seat 8 always abuts against the ball 6 , preventing the valve seat 8 from separating from the ball 6 and providing a more reliable seal.

[0034] As attached Figure 3 As shown, the pressure ring 24 is circumferentially provided with a plurality of guide holes 28, the number of which is equivalent to the number of the spring slots 26. The outer ends of the guide holes 28 are provided with threaded grooves 29, and a hexagonal screw 30 is threadedly connected to the inner surface of the threaded grooves 29. An adjustment column 31 is axially slidably provided in the guide holes 28. The outer surface of the adjustment column 31 is mounted with a third sealing ring 32 for forming a sealing fit with the inner surface of the guide hole 28. One end of the adjustment column 31 extends into the corresponding spring slot 26 and abuts against the preload spring 27, while the other end of the adjustment column 31 extends into the corresponding threaded groove 29 and abuts against the inner end of the hexagonal screw 30. By rotating the hexagonal screw 30, the axial position of the adjustment column 31 is changed, thereby changing the compression of the preload spring 27, thereby facilitating adjustment of the initial preload force of the preload spring 27.

[0035] As attached Figure 3 As shown, the outer circumference of the adjusting post 31 is provided with a plurality of axially extending pressure-stabilizing grooves 33. A floating gap 34 is provided between the pressure ring 24 and the valve seat 8. The pressure-stabilizing grooves 33 connect the floating gap 34 with the corresponding spring grooves 26. When the adjusting post 31 moves axially, the pressure-stabilizing grooves 33 maintain a stable internal pressure in the spring grooves 26, thereby ensuring smooth axial movement of the adjusting post 31.

[0036] As attached Figure 3 As shown, a sealing gasket 35 is sandwiched between the pressing ring 24 and the valve body 1, and the inner circumference of the sealing gasket 35 fits the outer circumference of the valve seat 8. This design can further improve the sealing between the pressing ring 24 and the valve body 1 and between the valve seat 8 and the inner wall of the valve body 1.

Claims

1. A V-shaped flanged ball valve, comprising a valve body (1), a bracket (2), an actuator (3), an upper valve stem (4), a lower valve stem (5), a ball (6), a bottom cover (7) and a valve seat (8), wherein the valve body (1) is provided with an upper shaft hole (9) and a lower shaft hole (10) at the upper and lower ends respectively, the upper valve stem (4) and the lower valve stem (5) are respectively passed through the upper shaft hole (9) and the lower shaft hole (10), the ball (6) is arranged in the valve body (1), and the two upper ends of the ball (6) are provided with The ends are respectively linked to the upper valve stem (4) and the lower valve stem (5), the bracket (2) is mounted on the upper end of the valve body (1), the actuator (3) is mounted on the bracket (2), and the output end of the actuator (3) is linked to the upper valve stem (4), the bottom cover (7) is sealingly mounted at a position corresponding to the lower end of the lower shaft hole (10) of the valve body (1), and the valve seat (8) is mounted in the ball (6) to form a sealing fit with the ball (6) when the valve is closed; it is characterized in that: The valve body (1) further comprises a bottom support assembly (11), wherein the bottom support assembly (11) comprises a support shaft (12) and an adjusting nut (13); a cylindrical cavity (14) is provided at a position corresponding to the lower end of the lower shaft hole (10) of the valve body (1); the support shaft (12) is arranged in the cylindrical cavity (14); and a first sealing ring (15) is installed on the outer circumferential surface of the support shaft (12) for forming a sealing fit with the inner circumferential surface of the cylindrical cavity (14); a screw hole (16) is provided axially through the bottom cover (7); the adjusting nut (13) is threadedly connected to the screw hole (16); and the upper and lower ends of the support shaft (12) are respectively tightly pressed against the lower end of the lower valve stem (5) and the upper end of the adjusting nut (13).

2. The V-shaped flanged ball valve according to claim 1, characterized in that: A hexagonal groove (17) is provided at the center of the lower end of the adjusting nut (13).

3. The V-shaped flanged ball valve according to claim 2, characterized in that: A locking nut (18) is threadedly connected to the screw hole (16), and the locking nut (18) is tightly abutted against the lower end of the adjusting nut (13). A hexagonal hole (36) is provided at the center of the locking nut (18), and the area of ​​the hexagonal hole (36) is larger than the area of ​​the hexagonal groove (17).

4. The V-shaped flanged ball valve according to claim 1, characterized in that: The lower end of the lower valve stem (5) is provided with a limiting flange (19) extending toward the periphery, the outer diameter of the limiting flange (19) is smaller than the inner diameter of the cylindrical cavity (14), a washer (20) is sandwiched between the upper end of the limiting flange (19) and the upper end of the cylindrical cavity (14), and a gasket (21) is provided between the limiting flange (19) and the support shaft (12).

5. The V-shaped flanged ball valve according to claim 4, characterized in that: An upper shaft sleeve (22) for sleeved on the outer periphery of the upper valve stem (4) is installed in the upper shaft hole (9), and a lower shaft sleeve (23) for sleeved on the outer periphery of the lower valve stem (5) is installed in the lower shaft hole (10).

6. The V-shaped flanged ball valve according to claim 1, characterized in that: The end face of the valve body (1) is mounted with a pressing ring (24) via a fastener, the valve seat (8) can be axially slidably arranged in the flow channel of the valve body (1), and a second sealing ring (25) for forming a sealing fit with the inner wall of the valve body (1) is provided on the outer circumferential surface of the valve seat (8), a plurality of spring grooves (26) are provided at one end of the valve seat (8) close to the pressing ring (24), a preload spring (27) is provided in the spring groove (26), the outer end of the preload spring (27) is pressed against one end of the pressing ring (24) close to the valve seat (8), so that the end of the valve seat (8) close to the sphere (6) is pressed against the surface of the sphere (6).

7. The V-shaped flanged ball valve according to claim 6, characterized in that: The pressure ring (24) is provided with a plurality of guide holes (28) whose number is equal to the spring groove (26) along the circumferential direction, the outer end of the guide hole (28) is provided with a thread groove (29), the inner thread of the thread groove (29) is connected with a hexagonal screw (30), an adjusting column (31) is provided in the guide hole (28) for axial sliding, the outer circular surface of the adjusting column (31) is provided with a third sealing ring (32) for forming a sealing fit with the inner circular surface of the guide hole (28), one end of the adjusting column (31) extends into the corresponding spring groove (26) and is tightly pressed against the preload spring (27), and the other end of the adjusting column (31) extends into the corresponding thread groove (29) and is tightly pressed against the inner end of the hexagonal screw (30).

8. The V-shaped flanged ball valve according to claim 7, characterized in that: A plurality of axially extending pressure-stabilizing grooves (33) are provided on the outer circular surface of the regulating column (31), a floating gap (34) is provided between the pressure ring (24) and the valve seat (8), and the pressure-stabilizing grooves (33) connect the floating gap (34) with the corresponding spring grooves (26).

9. The V-shaped flanged ball valve according to claim 6, characterized in that: A sealing gasket (35) is sandwiched between the pressure ring (24) and the valve body (1), and the inner circular surface of the sealing gasket (35) is in contact with the outer circular surface of the valve seat (8).

Images