Anti-freezing and anti-blocking V-shaped high-pressure ball valve

Abstract

The utility model discloses an anti-freezing and anti-blocking V-shaped high-pressure ball valve, and relates to the technical field of ball valves. The anti-freezing and anti-blocking V-shaped high-pressure ball valve comprises a main valve body, one side of the main valve body is connected with a right valve body through a movable flange, an adjusting gasket is fixedly installed on the main valve body, and a lower valve rod sliding bearing is arranged above the adjusting gasket. On the premise that linear pressure regulation is guaranteed, the regulating face of the ball core is designed to be in a water drop shape, so that the excellent regulating performance is guaranteed, throttling of the single-valve-seat V-shaped ball valve is center throttling different from annular throttling of a needle valve, the refrigeration coefficient is effectively reduced, the throttling freezing and blocking phenomena of the single-valve-seat V-shaped ball valve are relieved, it is guaranteed that a pipeline cannot be blocked due to hydrate freezing, and the service life of the single-valve-seat V-shaped ball valve is prolonged. The problem of single-valve-seat one-way sealing of the angle type ball valve is solved, and single-valve-seat two-way sealing can be achieved in a limited space.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a V-shaped high-pressure ball valve that is anti-freezing and blocking. Background Art

[0002] With the continuous expansion of gas field development, the number of natural gas wells continues to increase. In order to ensure the efficient production and operation of gas fields, the increase in the frequency of wellhead process measures and intermittent well operations has made the "wellhead remote safety switch" a bottleneck problem in ensuring the safe production of gas wells. At present, the wellhead digitalization is equipped with a remote control shut-off valve, which can realize remote emergency shut-off in case of emergency. The existing patent, patent announcement number CN111442108B, discloses a natural gas ball valve, whose structure includes a valve, an air inlet, an air guide pipe, a valve body, and an air outlet. The valve is movably engaged with the upper end position of the valve body, the air inlet is welded to the rear end position of the air guide pipe, and the air outlet is installed at the front end position of the air guide pipe. The valve body is embedded and connected with the air guide pipe. The push rod can be driven to rotate synchronously along the sliding groove on the bottom plate by rotating the rotating rod clockwise, so as to discharge the natural gas in the ball, effectively avoiding the situation that the ball will have residual natural gas inside when it rotates and closes. Through the cooperation of the movable bead on the rotating rod and the card slot, the rotating rod can be prevented from rotating due to the push of natural gas during normal transportation of the natural gas pipeline. When the ball in the valve body is normally opened and the ball needs to be rotated to cut off the natural gas transportation, the movable bead can be separated from the movable bead by pressing down the rotating rod, so that the rotating rod can be rotated.

[0003] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: Currently, the wellhead digital system is equipped with a remote-controlled shut-off valve, which can realize remote emergency shut-off in case of emergency, but cannot perform daily remote well opening and closing operations, resulting in a large workload for daily manual operations. Since the various wellhead shut-off valves in use do not have a pressure regulating function, well opening and closing operations must rely on manual on-site operations, which are labor-intensive and have high operation and maintenance costs. Therefore, we propose a V-type high-pressure ball valve that is anti-freezing and anti-blocking to solve the above-mentioned problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a V-shaped high-pressure ball valve that is resistant to freezing and blocking, and solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a V-type high-pressure ball valve with anti-freezing and blocking, comprising a main valve body, one side of the main valve body is connected to a right valve body through a movable flange, an adjusting gasket is fixedly installed on the main valve body, a lower valve stem sliding bearing is arranged above the adjusting gasket, a ball-connected upper and lower valve stems are arranged above the lower valve stem sliding bearing, a thrust gasket is sleeved above the upper and lower valve stems of the ball-connected upper and lower valve stems, an upper valve stem sliding bearing is arranged on the thrust gasket, a stuffing box is arranged in the upper valve stem sliding bearing, an inner O-ring of a sealing piston ring, an outer O-ring of the stuffing box and an outer O-ring of the sealing piston ring are arranged on one side of the stuffing box, and a flat fireproof gasket of the stuffing box is arranged above the outer O-ring of the sealing piston ring.

[0006] A bracket is fixedly installed on the top of the main valve body, a coupling sleeve is fixedly installed on the top of the bracket, an actuator is fixedly connected to the bracket through an actuator connecting hexagonal bolt, and an actuator handle is fixedly installed on the actuator.

[0007] A valve seat sealing ring is arranged on one side of the right valve body, and an outer O-ring of the valve seat sealing ring is sleeved on the surface of the valve seat sealing ring. A spring is embedded on one side of the right valve body, and a middle flange fireproof gasket is arranged between the right valve body and the main valve body.

[0008] Preferably, the right valve body and the main valve body are connected by an inserted flange connecting bolt, and a flange connecting nut is threadedly connected to one side of the flange connecting bolt.

[0009] Preferably, a screw hole for an outlet pressure sensor is provided on one side of the main valve body.

[0010] Preferably, the interior of the main valve body is filled with middle filler, upper filler and fireproof filler respectively, and a stuffing box hexagonal bolt is arranged in the stuffing box.

[0011] Preferably, a packing gland is provided above the stuffing box, and a packing gland hexagon socket bolt is provided on the packing gland.

[0012] Preferably, a screw hole for an inlet pressure sensor is provided on the right valve body, and an outer O-ring of the right valve body is sleeved on one side of the right valve body.

[0013] Preferably, one side of the right valve body is fixedly connected by a bracket hexagonal bolt.

[0014] Beneficial Effects

[0015] The utility model provides a V-shaped high-pressure ball valve that prevents freezing and blocking. Compared with the prior art, it has the following beneficial effects:

[0016] The anti-freeze and blockage V-type high-pressure ball valve is designed by designing the valve ball core with reference to the design method of the V-type ball valve. Under the premise of ensuring linear pressure regulation, the adjusting surface of the ball core is designed to be in the shape of a water drop, so as to ensure superior adjustment performance. Different from the annular throttling of the needle valve, the throttling of our single-seat V-type ball valve is central throttling, which effectively reduces the refrigeration coefficient and alleviates the throttling and freezing phenomenon, ensuring that the pipeline will not be blocked by hydrate freezing, making it impossible for the natural gas well to produce normally, solving the one-way sealing problem of the single valve seat of the angle ball valve, and can achieve two-way sealing of the single valve seat in a limited space.

[0017] At the same time, a single-seat ball valve structure is adopted to avoid impacting the valve core sealing surface. Due to the limited valve connection size, the valve body design can only be carried out in the form of a single valve seat seal. It is known that the single valve seat of the domestic ball valve is a one-way seal and cannot perform forward and reverse bidirectional sealing. It is impossible to avoid the natural gas backflowing back to the natural gas well due to the pressure buildup in the rear-end gathering and transportation pipeline, which inhibits the normal production of the natural gas well. We start with the O-ring of the one-way seal of the valve seat. Without affecting the cavity movement of the valve seat and the valve ball core in the valve body cavity to ensure the sealing performance, the O-ring outside the valve seat performs piston movement in a limited space to ensure forward and reverse sealing when the valve is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 A schematic diagram of the structure enlargement in the middle;

[0020] Figure 3 For this utility model Figure 1 Enlarged schematic diagram of the structure at point B in the middle.

[0021] In the figure: 1. movable flange; 2. right valve body; 3. flange connection nut; 4. flange connection bolt; 5. screw hole of outlet pressure sensor; 6. main valve body; 7. adjustment gasket; 8. lower valve stem sliding bearing; 9. ball connecting upper and lower valve stems; 10. thrust gasket; 11. upper valve stem sliding bearing; 12. stuffing box; 13. O-ring inside the sealing piston ring; 14. O-ring outside the stuffing box; 15. O-ring outside the sealing piston ring; 16. flat fireproof gasket of the stuffing box; 17. middle stuffing; 1 8. Upper packing; 19. Fireproof packing; 20. Hexagon socket bolt of packing box; 21. Packing gland; 22. Hexagon socket bolt of packing gland; 23. Bracket; 24. Coupling sleeve; 25. Screw hole of inlet pressure sensor; 26. Valve seat seal ring; 27. O-ring outside valve seat seal ring; 28. Spring; 29. ​​Fireproof gasket of middle flange; 30. O-ring outside right valve body; 31. Hexagon socket bolt of bracket; 32. Hexagon socket bolt of actuator connection; 33. Actuator; 34. Actuator handle. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The utility model provides a technical solution: a V-type high-pressure ball valve with anti-freezing and blocking, comprising a main valve body 6, one side of the main valve body 6 is connected with a right valve body 2 through a movable flange 1, an adjusting gasket 7 is fixedly installed on the main valve body 6, a lower valve stem sliding bearing 8 is arranged above the adjusting gasket 7, a ball-connected upper and lower valve stems 9 are arranged above the lower valve stem sliding bearing 8, a thrust gasket 10 is sleeved above the upper and lower valve stems 9 of the ball-connected upper and lower valve stems 9, an upper valve stem sliding bearing 11 is arranged on the thrust gasket 10, a stuffing box 12 is arranged in the upper valve stem sliding bearing 11, a sealing piston ring inner O-ring 13, a stuffing box outer O-ring 14 and a sealing piston ring outer O-ring 15 are arranged on one side of the stuffing box 12, and a stuffing box flat fireproof gasket 16 is arranged above the sealing piston ring outer O-ring 15.

[0024] A bracket 23 is fixedly mounted on the top of the main valve body 6 , a coupling sleeve 24 is fixedly mounted on the top of the bracket 23 , an actuator 33 is fixedly connected to the bracket 23 via an actuator connecting hexagonal bolt 32 , and an actuator handle 34 is fixedly mounted on the actuator 33 .

[0025] A valve seat sealing ring 26 is provided on one side of the right valve body 2, and a valve seat sealing ring outer O-ring 27 is sleeved on the surface of the valve seat sealing ring 26. A spring 28 is embedded on one side of the right valve body 2, and a middle flange fireproof gasket 29 is provided between the right valve body 2 and the main valve body 6.

[0026] Preferably, the right valve body 2 and the main valve body 6 are connected by an inserted flange connection bolt 4, and a flange connection nut 3 is threadedly connected to one side of the flange connection bolt 4.

[0027] The valve ball core is designed with reference to the design method of V-type ball valve. Under the premise of ensuring linear pressure regulation, the adjusting surface of the ball core is designed to be in the shape of a water drop, so as to ensure superior adjustment performance. Different from the annular throttling of the needle valve, the throttling of our single-seat V-type ball valve is central throttling, which effectively reduces the refrigeration coefficient and alleviates the phenomenon of throttling freezing and blocking, ensuring that the pipeline will not be blocked by hydrate freezing, making it impossible for the natural gas well to produce normally, and solving the problem of one-way sealing of single-seat angle ball valves. Single-seat two-way sealing can be achieved in a limited space.

[0028] Preferably, an outlet pressure sensor screw hole 5 is provided on one side of the main valve body 6 .

[0029] Preferably, the interior of the main valve body 6 is filled with a middle filler 17 , an upper filler 18 and a fireproof filler 19 , respectively, and a stuffing box hexagonal bolt 20 is provided in the stuffing box 12 .

[0030] Preferably, a packing gland 21 is disposed above the stuffing box 12 , and a packing gland hexagon socket bolt 22 is disposed on the packing gland 21 .

[0031] Preferably, an inlet pressure sensor screw hole 25 is provided on the right valve body 2 , and a right valve body outer O-ring 30 is sleeved on one side of the right valve body 2 .

[0032] Preferably, one side of the right valve body 2 is fixedly connected by a bracket hexagon socket bolt 31 .

[0033] Effectively alleviate the phenomenon of pipeline throttling and freezing caused by unstable pipeline pressure regulation of the regulating valve.

[0034] The teardrop-shaped V-shaped throttle hole ensures the regulating valve, adjusts the pressure linearity, ensures pipeline safety, and meets the production needs of diversified natural gas wells.

[0035] A single-seat ball valve structure is used to avoid impacting the valve core sealing surface. Due to the limited valve connection size, only a single-seat sealing form can be used for valve body design. It is known that the single-seat of domestic ball valves is a one-way seal and cannot perform forward and reverse bidirectional sealing. It is impossible to avoid the natural gas backflowing back to the natural gas well due to the pressure buildup in the rear-end gathering and transportation pipeline, which inhibits the normal production of the natural gas well. We start with the O-ring of the one-way seal of the valve seat. Without affecting the cavity movement of the valve seat and the valve ball core in the valve body cavity to ensure the sealing performance, the O-ring outside the valve seat performs piston movement in a limited space to ensure forward and reverse sealing when the valve is closed.

[0036] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A V-shaped high-pressure ball valve for preventing freezing and blocking, comprising a main valve body (6), characterized in that: One side of the main valve body (6) is connected to the right valve body (2) via a movable flange (1); an adjusting gasket (7) is fixedly mounted on the main valve body (6); a lower valve stem sliding bearing (8) is arranged above the adjusting gasket (7); a ball-connected upper and lower valve stems (9) are arranged above the lower valve stem sliding bearing (8); a thrust gasket (10) is sleeved above the upper and lower valve stems (9); an upper valve stem sliding bearing (11) is arranged on the thrust gasket (10); a stuffing box (12) is arranged inside the upper valve stem sliding bearing (11); a sealing piston ring inner O-ring (13), a stuffing box outer O-ring (14) and a sealing piston ring outer O-ring (15) are arranged on one side of the stuffing box (12); a stuffing box flat fireproof gasket (16) is arranged above the sealing piston ring outer O-ring (15); A bracket (23) is fixedly mounted on the top of the main valve body (6), a coupling sleeve (24) is fixedly mounted on the top of the bracket (23), an actuator (33) is fixedly connected to the bracket (23) via an actuator connecting hexagonal bolt (32), and an actuator handle (34) is fixedly mounted on the actuator (33); A valve seat sealing ring (26) is arranged on one side of the right valve body (2), a valve seat sealing ring outer O-ring (27) is sleeved on the surface of the valve seat sealing ring (26), a spring (28) is embedded on one side of the right valve body (2), and a middle flange fireproof gasket (29) is arranged between the right valve body (2) and the main valve body (6).

2. The V-shaped high-pressure ball valve for preventing freezing and blocking according to claim 1, characterized in that: The right valve body (2) and the main valve body (6) are connected via an inserted flange connection bolt (4), and a flange connection nut (3) is threadedly connected to one side of the flange connection bolt (4).

3. The V-shaped high-pressure ball valve for preventing freezing and blocking according to claim 1, characterized in that: An outlet pressure sensor screw hole (5) is provided on one side of the main valve body (6).

4. The V-shaped high-pressure ball valve for preventing freezing and blocking according to claim 1, characterized in that: The interior of the main valve body (6) is respectively filled with a middle filler (17), an upper filler (18) and a fireproof filler (19), and a stuffing box hexagonal bolt (20) is arranged in the stuffing box (12).

5. The V-shaped high-pressure ball valve for preventing freezing and blocking according to claim 1, characterized in that: A packing gland (21) is arranged above the packing box (12), and a packing gland hexagon socket bolt (22) is arranged on the packing gland (21).

6. The V-shaped high-pressure ball valve for preventing freezing and blocking according to claim 1, characterized in that: The right valve body (2) is provided with an inlet pressure sensor screw hole (25), and one side of the right valve body (2) is sleeved with a right valve body outer O-ring (30).

7. The V-shaped high-pressure ball valve for preventing freezing and blocking according to claim 1, characterized in that: One side of the right valve body (2) is fixedly connected via a bracket hexagon socket bolt (31).

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