Switch type hydraulic ball valve for deep sea

Abstract

The utility model relates to the technical field of hydraulic ball valves, in particular to a switch type hydraulic ball valve for deep sea, which comprises a valve and a hydraulic actuator. When the valve is placed in a deep sea, seawater enters the pressure balancer through the seawater inlet, the leather bag is pressed, pressure is conducted to all positions inside the pressure balancer through conductivity, the oil outlet is formed in the middle cavity of the cylinder body, and pressure oil enters the hole in the middle of the stuffing box through the oil outlet, so that the inner cavity of the stuffing box is filled with pressure stuffing, and the stuffing box is filled with the pressure stuffing. An inner hole in the middle of the stuffing box is pressed, so that the stuffing box is prevented from being in a vacuum state under water pressure, the stuffing box is filled with hydraulic oil, the stuffing can be always pressed, the hydraulic ball valve meets the engineering working condition that the water depth is three kilometers underwater, operation can be conducted through an underwater integrated controller, and the working efficiency is improved. The deep sea valve can be controlled from water by adopting an umbilical cable, the operation is convenient, the cost is low, the safety and the economical efficiency are relatively high, and the stable state of the system can be achieved through the pressure balancer.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic ball valves, in particular to a switch-type hydraulic ball valve for deep sea use. Background Art

[0002] Marine oil and gas resources are abundant, and the ability to develop deep-sea oil and gas resources is a reflection of national strength. With the gradual implementation of the country's call to explore the deep sea this year, domestic demand for valves for deep-sea pipelines is also increasing. In the deep sea, the deeper the pressure, the greater it is. At 3,000 meters underwater, deep-sea valves are subjected to 300 kilograms of pressure per square centimeter. Ordinary valves would be completely crushed under such conditions. To this end, we have proposed a deep-sea on-off hydraulic ball valve to solve the above problem. Utility Model Content

[0003] The purpose of the utility model is to provide a deep-sea on-off hydraulic ball valve to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a deep-sea switch-type hydraulic ball valve, comprising a valve and a hydraulic actuator, the hydraulic actuator comprising a cylinder body, a piston rack being slidably connected to the cylinder body, the bottom of the piston rack engaging a gear transmission shaft, the bottom of the cylinder body being connected to and fixed with a pressure balancer, the central cavity of the cylinder body and the pressure balancer being filled with hydraulic oil, hydraulic pipelines being connected on both sides of the cylinder body, the valve comprising a valve body, a valve stem, a ball and a stuffing box, valve covers being threadedly mounted on both sides of the valve body by bolts, valve seats being mounted on the two valve covers, a step being formed at the bottom of the valve body, a threaded hole being formed on the step, a bottom shaft being mounted on the valve body through the threaded hole, a stepped hole being formed at the top of the valve body, a thread being formed on the stepped hole, the stuffing box being connected to the valve body through the threaded hole, and a threaded hole being formed on the top of the stuffing box.

[0005] Further preferably, a sealing ring is installed between the valve seat and the ball.

[0006] Further preferably, an oil outlet is provided in the central cavity of the cylinder body, and the pressure oil enters the hole in the middle of the stuffing box through the oil outlet.

[0007] Further preferably, the dovetail groove is connected to the valve stem and the bottom shaft, and the top of the valve stem is connected to the output hole of the hydraulic actuator, so that the valve can quickly cut off the pipeline through the hydraulic actuator.

[0008] Further preferably, the hydraulic actuator is fixed by means of a threaded hole at the top of the stuffing box and a shaft head at the valve stem, and dovetail grooves are provided on the upper and lower parts of the sphere.

[0009] Compared with the prior art, the beneficial effects of the present invention are as follows: when the valve is placed in the deep sea, the seawater inlet enters the pressure balancer, and the bladder is compressed at this time. Since the bladder and the middle cavity of the cylinder are filled with hydraulic oil, the internal pressure is the same as that of seawater, and the pressure is transmitted to various parts of the interior through conductivity. Since an oil outlet is provided in the middle cavity of the cylinder, the pressure oil enters the hole in the middle of the stuffing box through the oil outlet, so that the inner cavity of the stuffing box is filled with pressure packing. The inner hole in the middle of the stuffing box is pressurized to avoid the stuffing box being in a vacuum state under water pressure, causing the stuffing box to deform and when the bolts are loose or a gap appears at the bottom of the hydraulic actuator, the stuffing gland is not compressed. The stuffing box is filled with hydraulic oil, so that the packing is always compressed. The hydraulic ball valve meets the engineering working conditions of three thousand meters underwater, and can be operated by an underwater centralized controller. The deep-sea valve can also be controlled from the water using an umbilical cable. It is easy to operate, low cost, safe and economical, and can achieve a stable system state through a pressure balancer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0012] Figure 3 This is a schematic diagram of a top-view cross-sectional structure of the present utility model;

[0013] Figure 4 for Figure 2 Schematic diagram of the enlarged structure of area A in the middle.

[0014] In the figure: 1. Valve; 2. Hydraulic actuator; 3. Cylinder; 4. Piston rack; 5. Gear drive shaft; 6. Pressure balancer; 7. Hydraulic oil; 8. Hydraulic pipeline; 9. Valve body; 10. Valve stem; 11. Ball; 12. Bottom shaft; 13. Valve seat; 14. Sealing ring; 15. Valve cover; 16. Oil outlet; 17. Stuffing box. DETAILED DESCRIPTION

[0015] 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.

[0016] Example

[0017] See also Figure 1-4The utility model provides a technical solution: a deep-sea switch-type hydraulic ball valve, including a valve 1 and a hydraulic actuator 2, the hydraulic actuator 2 includes a cylinder 3, a piston rack 4 is slidably connected in the cylinder 3, the bottom of the piston rack 4 is engaged with a gear transmission shaft 5, the bottom of the cylinder 3 is connected and fixed with a pressure balancer 6, the middle cavity of the cylinder 3 and the pressure balancer 6 are filled with hydraulic oil 7, both sides of the cylinder 3 are connected with hydraulic pipelines 8, the valve 1 includes a valve body 9, a valve stem 10, The ball 11 and the stuffing box 17 are connected to the valve body 9 by screw threads. The valve covers 15 are installed on both sides of the valve cover 15. The valve seat 13 is installed on the two valve covers 15. The bottom of the valve body 9 is provided with a step, and a threaded hole is provided on the step. The valve body 9 is provided with a bottom shaft 12 through the threaded hole. The top of the valve body 9 is provided with a stepped hole, and a thread is provided on the stepped hole. The stuffing box 17 is connected to the valve body 9 through the threaded hole. The top of the stuffing box 17 has a threaded hole. When the valve 1 is placed in the deep sea, the seawater enters the pressure balancer 6 through the inlet. At this time, the bladder is compressed. Since the bladder and the middle cavity of the cylinder body 3 are filled with hydraulic oil 7, the internal pressure is the same as seawater. The pressure is transmitted to various parts of the interior through conductivity. Since the middle cavity of the cylinder body 3 is provided with an oil outlet 16, the pressure oil enters the hole in the middle of the stuffing box 17 through the oil outlet 16, so that the inner cavity of the stuffing box 17 is filled with pressure filler. The inner hole in the middle of the stuffing box 17 is pressurized to avoid the stuffing box 17 being in a vacuum state under water pressure, causing the stuffing box 17 to deform and when the bolts are loose or a gap appears at the bottom of the hydraulic actuator 2, the stuffing gland is not compressed. The stuffing box 17 is filled with hydraulic oil 7, which can keep the packing compressed. The hydraulic ball valve meets the engineering conditions of three thousand meters underwater. It can be operated by an underwater centralized controller or by an umbilical cable from the water to control the deep-sea valve 1. It is easy to operate, low cost, safe and economical. The system can reach a stable state through the pressure balancer 6.

[0018] In this embodiment, specifically: a sealing ring 14 is installed between the valve seat 13 and the ball 11;

[0019] In this embodiment, specifically: an oil outlet 16 is opened in the middle cavity of the cylinder 3, and the pressure oil enters the hole in the middle of the stuffing box 17 through the oil outlet 16;

[0020] In this embodiment, specifically: the dovetail groove is connected to the valve stem 10 and the bottom shaft 12, and the top of the valve stem 10 is connected to the output hole of the hydraulic actuator 2, so that the valve 1 can quickly cut off the pipeline through the hydraulic actuator 2;

[0021] In this embodiment, specifically: the hydraulic actuator 2 is fixed through the threaded hole at the top of the stuffing box 17 and the shaft head at the valve stem 10, and the ball 11 has dovetail grooves on the top and bottom.

[0022] The utility model is at work: the oil cylinder is processed on a cast cylinder body 3, the structure is more compact, and the welding or bolt connection in the installation process is reduced, so that the cylinder body 3 can reduce the leakage point as much as possible, ensuring that the internal hydraulic oil 7 will not overflow or the external seawater will not flow in. At the same time, an oil outlet 16 is opened in the middle of the cylinder body 3, which is connected to the inner hole of the stuffing box 17 on the valve body 9. The oil can enter the inner hole of the stuffing box 17 along the oil outlet 16. The piston rack 4 is a structure with pistons on both sides and a rack in the middle. This overall structure can withstand a large thrust. The part is meshed with the gear transmission shaft 5. When the piston is running, the gear set converts the linear motion into angular motion. There is a torque output hole at the bottom of the gear transmission shaft 5 for connecting the valve 1. The top of the valve stem 10 is connected to the output hole of the hydraulic actuator 2, so that the valve 1 can quickly cut off the pipeline through the hydraulic actuator 2. The pressure balancer 6 is a double-opening type. The outlet is connected to the bladder and the inlet can introduce seawater into the interior. The outlet of the pressure balancer 6 is connected to the middle cavity of the cylinder 3. The middle of the cylinder 3 must be filled with hydraulic oil 7, and the hydraulic oil 7 must also make the bladder expand to half ( At this time, there is no pressure. When the valve 1 is placed in the deep sea, the seawater enters the pressure balancer 6 through the inlet. At this time, the bladder is compressed. Since the bladder and the middle cavity of the cylinder 3 are filled with hydraulic oil 7, the internal pressure is the same as that of seawater. The pressure is transmitted to various parts of the interior through conductivity. Since the middle cavity of the cylinder 3 is provided with an oil outlet 16, the pressure oil enters the hole in the middle of the stuffing box 17 through the oil outlet 16, so that the inner cavity of the stuffing box 17 is filled with pressure filler. The inner hole in the middle of the stuffing box 17 is pressurized to avoid the inside of the stuffing box 17 being in a vacuum state under water pressure. The state causes the stuffing box 17 to deform and when the bolts are loose or a gap appears at the bottom of the hydraulic actuator 2, the stuffing cover is not compressed. The stuffing box 17 is filled with hydraulic oil 7, which can keep the stuffing compressed, thereby forming a deep-sea switch-type hydraulic ball valve. The hydraulic ball valve meets the engineering working conditions of three thousand meters underwater. It can be operated by an underwater centralized controller or by an umbilical cable from the water. The deep-sea valve 1 is easy to operate, low in cost, safe and economical, and can achieve a stable system state through the pressure balancer 6.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A deep-sea on / off hydraulic ball valve, comprising a valve (1) and a hydraulic actuator (2), characterized in that: The hydraulic actuator (2) includes a cylinder (3), a piston rack (4) is slidably connected in the cylinder (3), the bottom of the piston rack (4) is engaged with a gear transmission shaft (5), the bottom of the cylinder (3) is connected to and fixed with a pressure balancer (6), the middle cavity of the cylinder (3) and the pressure balancer (6) are filled with hydraulic oil (7), both sides of the cylinder (3) are connected with hydraulic pipelines (8), the valve (1) includes a valve body (9), a valve stem (10), A ball (11) and a stuffing box (17) are provided. Valve covers (15) are installed on both sides of the valve body (9) through bolt threads. Valve seats (13) are installed on the two valve covers (15). A step is provided at the bottom of the valve body (9), and a threaded hole is provided on the step. A bottom shaft (12) is installed on the valve body (9) through the threaded hole. A stepped hole is provided at the top of the valve body (9), and a thread is provided on the stepped hole. The stuffing box (17) is connected to the valve body (9) through the threaded hole, and the top of the stuffing box (17) has a threaded hole.

2. A deep-sea on / off hydraulic ball valve according to claim 1, characterized in that: A sealing ring (14) is installed between the valve seat (13) and the sphere (11).

3. A deep-sea on / off hydraulic ball valve according to claim 2, characterized in that: An oil outlet (16) is provided in the middle cavity of the cylinder body (3), and pressure oil enters the hole in the middle of the stuffing box (17) through the oil outlet (16).

4. A deep-sea on / off hydraulic ball valve according to claim 3, characterized in that: The dovetail groove is connected to the valve stem (10) and the bottom shaft (12), and the top of the valve stem (10) is connected to the output hole of the hydraulic actuator (2), thereby achieving the purpose of the valve (1) quickly cutting off the pipeline through the hydraulic actuator (2).

5. The deep-sea on / off hydraulic ball valve according to claim 4, characterized in that: The hydraulic actuator (2) is fixed via the threaded hole at the top of the stuffing box (17) and the shaft head at the valve stem (10), and the sphere (11) is provided with dovetail grooves at the top and bottom.

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