Cutting-off type hydraulic ball valve for deep sea

Abstract

The utility model relates to a cut-off type hydraulic ball valve for deep sea, which comprises a single-action hydraulic actuator and a valve, and the hydraulic actuator comprises a compact cylinder body, a piston rack, a gear transmission shaft, a pressure balancer, a spring energy storage device and a valve position feedback indicator. And the valve part comprises a valve body, a valve rod, a ball, a valve seat, a valve seat gland and a stuffing box. The deep-sea external pressure resistant ball valve has the advantages of deep-sea external pressure resistant working condition, simple structure, low cost and high stability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of actuator, concretely relates to a cut-off type hydraulic ball valve for deep sea. BACKGROUND

[0002] In deep sea, the deeper the place, the greater the pressure, at 3000 meters under water, the deep sea valve will be subjected to 300 kilograms per square centimeter pressure. The general ordinary valve will be completely extruded and broken under this working condition.

[0003] The traditional valve has unreasonable design structure, cannot satisfy the requirement of deep sea oil and gas development, is difficult to carry out corresponding valve related operation, and the overall cost control is also poor. In view of the above problems, a cut-off type hydraulic ball valve for deep sea is provided. UTILITY MODEL CONTENTS

[0004] In order to solve the problems in the background art, the utility model provides a cut-off type hydraulic ball valve for deep sea. The design concept of the deep sea valve is more reasonable, can satisfy the requirement of the development of the deep sea oil and gas field in China and scientific research. The hydraulic ball valve can satisfy the engineering working condition of 3000 meters water depth under water. It can be operated by underwater centralized controller, and the deep sea valve can also be operated by umbilical cable from water surface. The operation is convenient, the cost is low, the safety and economy are compared, and the system stable state can be reached by pressure equalizer.

[0005] The utility model provides a cut-off type hydraulic ball valve for deep sea, including actuator assembly, valve and pressure equalizer, the actuator assembly includes compact cylinder, piston rack, gear transmission shaft, spring energy storage device and actuator, the outlet of pressure equalizer is linked with the middle part of compact cylinder of actuator, the compact cylinder is equipped with actuator, and the both ends of actuator are fixedly installed with oil cylinder piston and spring piston, one end of oil cylinder piston is fixedly connected with piston rack, one end of spring piston is fixedly connected with spring energy storage device, and the bottom of gear transmission shaft is equipped with torque output hole.

[0006] Further, the valve includes valve body, left valve cover, right valve cover, valve seat, valve seat sealing ring, valve stem, ball and packing gland, the left valve cover and right valve cover are connected to the valve body by bolt, the left valve cover and right valve cover have stepped hole for installing valve seat, the bottom of valve body is opened with step, the bottom shaft is connected with the valve body below by screw thread, the packing gland is connected with the valve body by screw thread, the actuator assembly is connected by screw thread at the top of packing gland and the shaft head at valve stem, and the top of valve stem is connected with the output hole of actuator assembly.

[0007] Further, the pressure equalizer is a double opening container, a bladder is arranged in the pressure equalizer, the bladder is connected with the outlet of the pressure equalizer, the outlet of the pressure equalizer is provided with a hydraulic oil equalizing pipe, the hydraulic oil equalizing pipe is connected with the middle part of the compact cylinder, and the compact cylinder is communicated with the inner hole of the stuffing box.

[0008] Further, flange holes are formed in the left valve cover and the right valve cover, and pipelines are connected.

[0009] Further, the bottom of the gear transmission shaft is connected with a valve through a torque output hole.

[0010] Further, dovetail grooves are formed in the upper and lower sides of the ball, and the ball is connected with the valve rod and the bottom shaft through the dovetail grooves.

[0011] Further, the compact cylinder is connected with the inner hole of the stuffing box through the oil outlet.

[0012] The utility model has the advantages of the following:

[0013] The utility model discloses a single-acting hydraulic actuator and a valve, the hydraulic actuator comprises a compact cylinder, a piston rack, a gear transmission shaft, a pressure equalizer, a spring energy storage device and a valve position feedback indicator, and the valve part comprises a valve body, a valve rod, a ball, a valve seat, a valve seat gland and a stuffing box. DRAWINGS

[0014] Figure 1 It is an underwater overall assembly schematic view of the utility model of a deep-sea cut-off type hydraulic ball valve.

[0015] Figure 2 It is an underwater assembly sectional view of the utility model of a deep-sea cut-off type hydraulic ball valve.

[0016] Figure 3 It is a schematic view of area A of the utility model of a deep-sea cut-off type hydraulic ball valve.

[0017] Figure 4 It is a structural schematic view of the pressure equalizer of the utility model of a deep-sea cut-off type hydraulic ball valve.

[0018] As shown in the drawings:

[0019] 1 compact cylinder, 2 piston rack, 3 gear transmission shaft, 4 spring accumulator, 5 actuator, 6 oil cylinder piston, 7 spring piston, 8 valve body, 9 left valve cover, 10 right valve cover, 11 valve seat, 12 valve seat sealing ring, 13 valve stem, 14 ball, 15 stuffing box, 16 oil outlet, 17 pressure equalizer, 18 hydraulic oil equalizing pipe, 19 torque output hole, 20 bottom shaft. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0021] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0022] Please refer to all the drawings of the specification:

[0023] A deep-sea cut-off type hydraulic ball valve, the actuator assembly comprises a compact cylinder 1, a piston rack 2, a gear transmission shaft 3, a spring accumulator 4 and an actuator 5.

[0024] The oil cylinder piston 6 and the spring piston 7 are respectively arranged on the two sides of the actuator, when the oil cylinder is filled with oil, the piston is pushed to move, the piston rack 2 parts on the oil cylinder piston 6 and the spring piston 7 are engaged with the gear transmission shaft 3, the piston rack 2 and the gear transmission shaft 3 convert the straight stroke into angular stroke movement. The bottom of the gear transmission shaft 3 has a torque output hole 19 for connecting the valve 22, the middle of the compact cylinder 1 is provided with an oil outlet 16 for connecting with the inner hole of the stuffing box 15.

[0025] At the same time, the spring piston 7 also pushes the spring accumulator 4 to move in the compression direction to store energy. When the oil in the oil cylinder is discharged, the spring accumulator 4 pushes the spring piston 7 to move reversely and makes the output shaft move reversely.

[0026] The valve part includes valve body 8, left valve cover 9, right valve cover 10, valve seat 11, valve seat sealing ring 12, valve stem 13, ball 14 and stuffing box 15. The left valve cover 9 and the right valve cover 10 are connected to the valve body 8 by bolts, flange holes are opened on the left valve cover 9 and the right valve cover 10 to connect with the pipelines outside, the left valve cover 9 and the right valve cover 10 have stepped holes for installing the valve seat 11, the bottom of the valve body 8 is stepped, the stepped part has screw holes, the bottom shaft 20 is connected to the valve body 8 through the screw holes, the top of the valve body 8 has a stepped hole, the stepped hole has screw holes, the stuffing box 15 is connected to the valve body 8 through the screw holes, the top of the stuffing box 15 has screw holes, the actuator assembly is fixed through the screw holes on the top of the stuffing box 15 and the shaft head of the valve stem 13, the upper and lower sides of the ball 14 have dovetail grooves, the dovetail grooves are connected to the valve stem 13 and the bottom shaft 20, the top of the valve stem 13 is connected to the output hole of the actuator assembly, so that the valve can be quickly cut off through the actuator assembly.

[0027] The pressure equalizer 17 is a double-opening container with a built-in bladder connected to the outlet.

[0028] The upper part of the pressure equalizer 17 has an inlet that can directly introduce seawater into the interior when immersed in the seabed. In use, the outlet of the pressure equalizer 17 is connected to the middle part of the compact cylinder 1 of the actuator assembly, and at the same time, it is also connected to the cylinder of the spring accumulator 4 through an external hydraulic oil equalization pipe 18, and the middle part of the cylinder of the spring accumulator 4 has an oil outlet communicating with the inner hole of the stuffing box 15.

[0029] When the cut-off type hydraulic ball valve is placed in the deep sea and the middle part of the compact cylinder 1 is filled with water-based hydraulic oil to expand the bladder to half the volume, the bladder is filled with hydraulic oil, seawater enters the pressure equalizer 17, and the bladder is compressed, so that the pressure inside the compact cylinder 1 is the same as the external pressure. At the same time, when the oil cylinder is filled with oil, the oil filled in the cylinder of the spring accumulator 4 enters the bladder through the external hydraulic oil equalization pipe 18 due to the entry of the oil cylinder piston 6 and the spring piston 7, ensuring that the pressure in the cylinder of the spring accumulator 4 is the same as the seawater pressure and is not affected by the pressure difference. When in the deep sea, the compact cylinder 1 and the gear box are filled with pressure, at this time the hydraulic oil will follow the oil outlet and enter the inner hole of the stuffing box 15, the gland in the inner hole is compressed, so that the packing is not loose and is always in a compressed state, thereby avoiding the oil in the pipeline from flowing out of the valve stem when the gland is loose.

[0030] The above has described the utility model and its implementation mode, and this description is not restrictive, and the specific implementation mode shown is only one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. A deep-sea cut-off hydraulic ball valve comprising an actuator assembly, a valve and a pressure equalizer, characterized in that: The actuator assembly comprises a compact cylinder, a piston rack, a gear transmission shaft, a spring accumulator and an actuator; the outlet of the pressure equalizer is connected with the middle part of the actuator, the compact cylinder is provided with the actuator, the actuator is fixedly provided with an oil cylinder piston and a spring piston at two ends respectively, the oil cylinder piston is fixedly connected with the piston rack at one end, the spring piston is fixedly connected with the spring accumulator at one end, and the bottom of the gear transmission shaft is provided with a torque output hole.

2. The deep-sea use cut-off type hydraulic ball valve according to claim 1, characterized in that: The valve comprises a valve body, a left valve cover, a right valve cover, a valve seat, a valve seat sealing ring, a valve rod, a ball and a stuffing box; the left valve cover and the right valve cover are connected to the valve body by bolts, the left valve cover and the right valve cover have stepped holes for installing the valve seat, the bottom of the valve body is provided with a step, the bottom shaft is threadedly connected below the valve body, the stuffing box is threadedly connected with the valve body, the actuator assembly is threadedly connected through the top of the stuffing box and the shaft head at the valve rod, and the top of the valve rod is connected with the output hole of the actuator assembly.

3. The deep-sea use cut-off type hydraulic ball valve according to claim 2, characterized in that: The pressure equalizer is a double-opening container, the pressure equalizer is provided with a bladder, the bladder is connected with the outlet of the pressure equalizer, the outlet of the pressure equalizer is provided with a hydraulic oil balance pipe, the hydraulic oil balance pipe is connected with the middle part of the compact cylinder, and the compact cylinder is communicated with the inner hole of the stuffing box.

4. The deep-sea use cut-off type hydrodynamic ball valve according to claim 3, characterized in that: The left valve cover and the right valve cover are provided with flange holes and connected with pipelines.

5. The shear-type hydraulic ball valve for deep sea use according to claim 4, characterized in that: The bottom of the gear transmission shaft is connected with the valve through a torque output hole.

6. The deep-sea cut-off hydrodynamic ball valve according to claim 5, characterized in that: The upper and lower sides of the ball are provided with dovetail grooves, and the ball is connected with the valve rod and the bottom shaft through the dovetail grooves.

7. The shear-type hydraulic ball valve for deep sea use according to claim 6, characterized in that: The compact cylinder is provided with an oil outlet, and the compact cylinder is connected with the inner hole of the stuffing box through the oil outlet.

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