Novel underwater hydraulic gate valve driver

Abstract

The utility model discloses a novel underwater hydraulic gate valve driver which comprises a cylinder body, a piston is arranged in the cylinder body, a piston rod is arranged on the piston, an upper cylinder cover is arranged at the top of the piston, the upper end of the piston rod axially penetrates through the upper cylinder cover, a lower cylinder cover is arranged at the bottom of the cylinder body, and the lower cylinder cover is arranged on the cylinder body. A piston is arranged in the cylinder body, a plurality of layers of disc springs are arranged in the cylinder body and located between the upper cylinder cover and the lower cylinder cover, a cavity is formed in the upper cylinder cover, the cavity is communicated with the interior of the piston, a driving opening is formed in the top of the upper cylinder cover, the driving opening is a through hole, and the driving opening is communicated with the cavity. The novel underwater hydraulic gate valve driver is large in driving force, small in size and short in acting time, the valve can be flexibly opened and closed underwater when the novel underwater hydraulic gate valve driver is connected with the valve, and the safety of oil and gas development is greatly guaranteed.

Description

Technical Field

[0001] The utility model relates to a novel underwater hydraulic gate valve driver, belonging to the technical field of valve driving devices used in underwater environments. Background Art

[0002] The underwater hydraulic gate valve actuator is a driving device installed on the underwater gate valve to control the opening and closing of the valve. The hydraulic oil is injected into the actuator through the driving port to pressurize the piston connected to the valve stem to move down to open or close the valve, and the piston is moved up by the force of the spring to close or open the valve. The quality of the actuator is mainly considered from the aspects of service life, reliability, efficiency and anti-corrosion effect.

[0003] Traditional underwater actuators use cylindrical springs, which have the disadvantages of small force, large size, and low reliability. At the same time, the design of most underwater actuators cannot avoid seawater corrosion of key components in the actuator cavity, which affects the service life of the actuator and has poor reliability. Utility Model Content

[0004] The utility model aims to provide a novel underwater hydraulic gate valve driver, which has large driving force, small size, short action time, and is connected with a valve so that the valve can be flexibly opened and closed underwater, greatly ensuring the safety of oil and gas development.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a new type of underwater hydraulic gate valve driver for driving the opening or closing of the underwater hydraulic gate valve, which includes a cylinder body, a piston is arranged in the cylinder body, a piston rod is arranged on the piston, an upper cylinder cover is arranged on the top of the piston, the upper end of the piston rod axially passes through the upper cylinder cover, a lower cylinder cover is arranged at the bottom of the cylinder body, a multi-layer disc spring is arranged in the cylinder body, the multi-layer disc spring is located between the upper cylinder cover and the lower cylinder cover, a cavity is provided in the upper cylinder cover, the cavity is connected with the interior of the piston, a driving port is provided on the top of the upper cylinder cover, the driving port is a through hole, and the driving port is connected with the cavity.

[0006] Preferably, the piston rod is coaxial with the piston, and the disc spring is coaxial with the cylinder body.

[0007] Preferably, a portion of the multi-layer disc spring is sleeved on the piston.

[0008] Preferably, the underwater hydraulic gate valve includes a valve stem for opening or closing the valve, and the upper end of the valve stem is fixedly connected to the bottom of the piston.

[0009] Preferably, a pressure cover is provided above the topmost layer of disc springs in the multi-layer disc springs, the pressure cover is located between the cylinder body and the piston, and the pressure cover is located below the upper cylinder cover.

[0010] Preferably, a compensation port is provided at the top of the upper cylinder cover, a gap is provided between the bottom of the upper cylinder cover and the top of the piston, a gap is provided between the side wall of the upper cylinder cover and the side wall of the piston, and the compensation port is communicated with the gap.

[0011] Preferably, an upper locking ring is provided on the top of the cylinder body, and the upper locking ring is located above the upper cylinder cover. A lower locking ring is provided on the bottom of the cylinder body, and the lower locking ring is located below the lower cylinder cover.

[0012] Preferably, a first sealing ring is provided between the side wall of the upper cylinder cover and the side wall of the piston, a sleeve portion extending axially downward is provided in the middle of the upper cylinder cover, the piston rod passes through the sleeve portion, and a second sealing ring is provided between the piston rod and the sleeve portion.

[0013] Preferably, a fixing ring is sleeved on the lower end of the piston rod.

[0014] Preferably, the piston rod is made of beryllium copper material.

[0015] The beneficial effects of the utility model are as follows: the new underwater hydraulic gate valve driver of the utility model has a large driving force, a small size, a short action time, and is connected to a valve so that the valve can be flexibly opened and closed underwater, which can reduce the accident rate caused by long closing or opening time in sudden emergencies such as blowouts and overflows during underwater oil exploitation, greatly reducing the risk of exploitation, and providing a reliable guarantee for safe underwater oil and gas resource exploitation. It has high reliability, good anti-corrosion effect, and long service life, and is suitable for the needs of underwater oil and natural gas exploitation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a cross-sectional view of the structure schematic diagram of the novel underwater hydraulic gate valve actuator of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the novel underwater hydraulic gate valve driver of the utility model in an embodiment. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiments of the utility model:

[0021] The utility model provides a new underwater hydraulic gate valve driver, please refer to Figure 1 and Figure 2 , including a cylinder body 5, a piston 4 is arranged in the cylinder body 5, a piston rod 1 is arranged on the piston 4, an upper cylinder cover 3 is arranged on the top of the piston 4, the upper end of the piston rod 1 axially passes through the upper cylinder cover 3, a lower cylinder cover 10 is arranged at the bottom of the cylinder body 5, a multi-layer disc spring 6 is arranged in the cylinder body 5, and the multi-layer disc spring 6 is located between the upper cylinder cover 3 and the lower cylinder cover 10, and a cavity 15 is provided in the upper cylinder cover 3, and the cavity 15 is communicated with the interior of the piston 4, and a driving port 12 is arranged on the top of the upper cylinder cover 3, and the driving port 12 is a through hole, and the driving port 12 is communicated with the cavity 15. The disc spring 6 design is adopted instead of the traditional cylindrical spring design, which reduces the overall size and makes the structure compact. The disc spring design is adopted instead of the traditional cylindrical spring design, which can reduce the overall size of the driver, make the structure of the driver compact, and save space for the originally compact underwater equipment system. The mechanical properties of disc springs are better than those of cylindrical springs, which reduces the time to close or open the valve, shortens the operation time in emergency situations, and reduces the probability of accidents expanding.

[0022] Preferably, the piston rod 1 is coaxial with the piston 4 , and the disc spring 6 is coaxial with the cylinder body 5 .

[0023] Preferably, a portion of the multi-layer disc spring 6 is sleeved on the piston 4 , that is, an upper portion of the multi-layer disc spring 6 is sleeved on the piston 4 .

[0024] Preferably, the underwater hydraulic gate valve includes a valve stem 18 for opening or closing the valve, and the upper end of the valve stem 18 is fixedly connected to the bottom of the piston 4.

[0025] Preferably, a pressure cover 14 is provided above the topmost layer of disc springs in the multi-layer disc springs 6 , the pressure cover 14 is located between the cylinder body 5 and the piston 4 , and the pressure cover 14 is located below the upper cylinder cover 3 .

[0026] Preferably, a compensation port 13 is provided at the top of the upper cylinder cover 3 , a gap is provided between the bottom of the upper cylinder cover 3 and the top of the piston 4 , a gap 16 is provided between the side wall of the upper cylinder cover 3 and the side wall of the piston 4 , and the compensation port 13 is connected to the gap 16 .

[0027] Preferably, an upper locking ring 2 is provided on the top of the cylinder body 5, and the upper locking ring 2 is located above the upper cylinder cover 3. A lower locking ring 11 is provided on the bottom of the cylinder body 5, and the lower locking ring 11 is located below the lower cylinder cover 10. The surfaces of the piston rod 1, the upper locking ring 2, the upper cylinder cover 3, the piston 4, the cylinder body 5, the lower cylinder cover 10 and the lower locking ring 11 are treated with Teflon material, which not only improves the electrical conductivity of the material and reduces the rate of electrical corrosion while playing a role in seawater chemical corrosion, but also is suitable for underwater use. The upper locking ring 2 fixes the upper cylinder cover 3, and the lower locking ring 11 fixes the lower cylinder cover 10.

[0028] Preferably, a first sealing ring 7 is provided between the side wall of the upper cylinder cover 3 and the side wall of the piston 4, a sleeve portion 17 extending axially downward is provided in the middle of the upper cylinder cover 3, the piston rod 1 passes through the sleeve portion 17, and a second sealing ring 8 is provided between the piston rod 1 and the sleeve portion 17. The first sealing ring 7 and the second sealing ring 8 adopt a combined sealing form of PTFE polytetrafluoroethylene and HNBR hydrogenated nitrile rubber material, have good oil resistance, and extend the service life of the seal.

[0029] Preferably, a fixing ring 9 is sleeved on the lower end of the piston rod 1 .

[0030] Preferably, the piston rod 1 is made of beryllium copper, which abandons the traditional low-alloy steel. This material is corrosion-resistant, has high fatigue strength, is non-magnetic, and does not generate sparks when impacted, thereby improving the safety of oil extraction.

[0031] When the new underwater hydraulic gate valve driver of the utility model is in use, hydraulic oil is injected from the driving port 12 and pressure is pumped in to move the piston 4, the fixing ring 9, and the piston rod 1 downward, driving the gland 14 downward, compressing the disc spring 6, and connecting the piston 4 with the valve stem 18 of the valve to open or close the valve. The driving port unloads the pressure to make the pressure 1% or less of the rated pressure, and the disc spring 6 automatically stretches to drive the gland 14 and the piston 4 upward, and the piston 4 is connected with the valve stem 18 of the valve to close or open the valve. During the whole process, the compensation port 13 injects hydraulic oil and pumps in a pressure equal to the water depth to realize the pressure compensation function.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A novel underwater hydraulic gate valve driver, used to drive the underwater hydraulic gate valve to open or close, comprising a cylinder body, a piston is arranged in the cylinder body, and a piston rod is arranged on the piston, characterized in that: An upper cylinder cover is provided on the top of the piston, and the upper end of the piston rod axially passes through the upper cylinder cover. A lower cylinder cover is provided at the bottom of the cylinder body, and a multi-layer disc spring is provided in the cylinder body. The multi-layer disc spring is located between the upper cylinder cover and the lower cylinder cover. A cavity is provided in the upper cylinder cover, and the cavity is connected with the interior of the piston. A drive port is provided on the top of the upper cylinder cover, and the drive port is a through hole, and the drive port is connected with the cavity.

2. The novel underwater hydraulic gate valve actuator according to claim 1 is characterized in that: The piston rod is coaxial with the piston, and the disc spring is coaxial with the cylinder body.

3. The novel underwater hydraulic gate valve actuator according to claim 2 is characterized in that: A portion of the multi-layer disc spring is sleeved on the piston.

4. The novel underwater hydraulic gate valve actuator according to claim 3 is characterized in that: The underwater hydraulic gate valve comprises a valve stem for opening or closing the valve, and the upper end of the valve stem is fixedly connected to the bottom of the piston.

5. The novel underwater hydraulic gate valve actuator according to claim 4 is characterized in that: A pressure cover is arranged above the topmost disc spring in the multi-layer disc spring, the pressure cover is located between the cylinder body and the piston, and the pressure cover is located below the upper cylinder cover.

6. The novel underwater hydraulic gate valve actuator according to claim 5 is characterized in that: A compensation port is provided on the top of the upper cylinder cover, a gap is provided between the bottom of the upper cylinder cover and the top of the piston, a gap is provided between the side wall of the upper cylinder cover and the side wall of the piston, and the compensation port is communicated with the gap.

7. The novel underwater hydraulic gate valve actuator according to claim 6 is characterized in that: An upper locking ring is arranged on the top of the cylinder body, and the upper locking ring is located above the upper cylinder cover. A lower locking ring is arranged on the bottom of the cylinder body, and the lower locking ring is located below the lower cylinder cover.

8. The novel underwater hydraulic gate valve actuator according to claim 7 is characterized in that: A first sealing ring is arranged between the side wall of the upper cylinder cover and the side wall of the piston, a sleeve portion extending axially downward is arranged in the middle of the upper cylinder cover, the piston rod passes through the sleeve portion, and a second sealing ring is arranged between the piston rod and the sleeve portion.

9. The novel underwater hydraulic gate valve actuator according to claim 8 is characterized in that: The lower end of the piston rod is sleeved with a fixing ring.

10. The novel underwater hydraulic gate valve actuator according to claim 9 is characterized in that: The piston rod is made of beryllium copper material.

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