Intelligent control ball valve for offshore drilling platform

Abstract

The utility model discloses a kind of intelligence control ball valves for offshore drilling platform, it is related to valve field, it includes valve body, valve core, valve rod, valve seat and with the execution mechanism of valve rod connection, the execution mechanism includes linkage connection's worm wheel assembly and hand wheel and is arranged between worm wheel assembly and hand wheel Static torque sensor, the valve body includes left valve body, right valve body and fixedly installed in left valve body and right valve body The middle valve body, the middle valve body is equipped with pressure self-tight sealing pad between left valve body and right valve body respectively.The utility model has the advantages of good sealing, good safety.

Description

Technical Field

[0001] This utility model relates to the field of valves, specifically to a smart control ball valve for offshore drilling platforms. Background Technology

[0002] my country has a vast marine territory and extremely rich oil and gas resources. The "15th Five-Year Plan" period will be a critical stage for the country to accelerate the construction of a maritime power and achieve breakthroughs in high-end equipment manufacturing. Therefore, as the leading product in the marine equipment manufacturing field, the intelligent control ball valve for marine drilling platforms (hereinafter referred to as marine ball valve) is facing unprecedented development opportunities and challenges.

[0003] ① Marine ball valves are installed in harsh atmospheric environments with high salinity and humidity, which can cause severe corrosion to the valves. Therefore, the materials of the components need to be carefully selected, and the surfaces should be protected.

[0004] ②The oil and gas medium contains solid particles such as sand and compounds, which cause severe erosion to the sealing surfaces of the ball and valve seat under high pressure. Therefore, the surfaces of the components through which the medium flows must be reinforced and hardened.

[0005] ③Because offshore platforms are far from the mainland, the space for valve installation is small, and maintenance and replacement are inconvenient, the quality requirements for valves are very high, the quality assurance control is strict, and the service life is extended.

[0006] ④ At sea, where there is severe vibration and swaying, and even typhoon attacks, the stability and anti-loosening devices of the connectors and control systems are especially important. Utility Model Content

[0007] To overcome the shortcomings of the prior art, this utility model provides a smart control ball valve for offshore drilling platforms that has good sealing performance and high safety.

[0008] The technical solution adopted in this utility model is as follows: a smart control ball valve for offshore drilling platforms, which includes a valve body, a valve core, a valve stem, a valve seat, and an actuator connected to the valve stem. The actuator includes a worm gear assembly and a handwheel that are linked together, and a static torque sensor disposed between the worm gear assembly and the handwheel. The valve body includes a left valve body, a right valve body, and a middle valve body that is fixedly installed between the left valve body and the right valve body. Pressure self-tightening sealing gaskets are respectively provided between the middle valve body and the left valve body and the right valve body.

[0009] The cross-section of the pressure self-tightening gasket is T-shaped.

[0010] The valve seat adopts the BID-1 dual valve seat, and each valve seat adopts a bidirectional sealing structure.

[0011] The valve body is also equipped with a pressure sensor for detecting the internal pressure of the valve body.

[0012] The middle valve body is connected to the left valve body and the right valve body by bolts and wedge-type eccentric anti-rotation nuts, respectively.

[0013] It also includes a stuffing box and a stuffing gland, with a fastener connecting the stuffing gland and the middle valve body. The fastener has a resistance element, which is connected to a resistance strain gauge via a wire.

[0014] The worm gear assembly is provided with a first linkage shaft, the handwheel is provided with a second linkage shaft, and a bushing is provided between the first linkage shaft and the second linkage shaft to link the two.

[0015] The static torque sensor is mounted on the second linkage shaft. The beneficial effects of this utility model are as follows: In order to prevent media leakage at the connection surfaces between the middle valve body and the left and right valve bodies, a T-shaped pressure self-tightening sealing gasket is designed. The gasket sealing surface is pressed by the high pressure of the medium, which has a good sealing effect. In addition, a torque sensor is installed in the actuator that controls the valve opening and closing, and an early warning system is set for the maximum value of the opening and closing. Once the valve stem rotation is obstructed, the ball is blocked by solid particles or debris, the valve stem is not closed in place, and the torque exceeds the set value, the information will be transmitted to the control center via Ethernet or wirelessly to realize real-time monitoring of the valve opening and closing status, issue a shutdown warning, and protect the system safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a smart control ball valve for an offshore drilling platform according to an embodiment of this utility model.

[0017] Figure 2 A cross-sectional view of a smart control ball valve for offshore drilling platforms.

[0018] Figure 3 This is a schematic diagram of the actuator.

[0019] Figure 4 This is a schematic diagram of the packing gland and fasteners.

[0020] Figure 5 This is a schematic diagram of the structure of a pressure self-tightening gasket. Detailed Implementation

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings: As shown in the figure, a smart control ball valve for an offshore drilling platform includes a valve body, a valve core 1, a valve stem 2, a valve seat 10, and an actuator connected to the valve stem 2. The actuator includes a worm gear assembly 3 and a handwheel 4 that are linked together, and a static torque sensor 5 disposed between the worm gear assembly 3 and the handwheel 4. The worm gear assembly 3 is provided with a first linkage shaft 19, and the handwheel 4 is provided with a second linkage shaft 20. A bushing 21 is provided between the first linkage shaft 19 and the second linkage shaft 20 to link the two. The static torque sensor 5 is mounted on the second linkage shaft 20. The valve body includes a left valve body 6, a right valve body 7, and an actuator fixedly mounted between the left valve body 6 and the right valve body 7. The middle valve body 8 is provided with pressure self-tightening sealing gaskets 9 between the middle valve body 8 and the left valve body 6 and the right valve body 7 respectively. In order to prevent the medium from leaking out at the connection surface between the middle valve body and the left and right valve bodies, a T-shaped pressure self-tightening sealing gasket is designed. The gasket sealing surface is pressed by the high pressure of the medium, which has a good sealing effect. In addition, a torque sensor is installed in the actuator that controls the valve opening and closing, and an early warning system is set for the maximum opening value. Once the valve stem rotation is obstructed, the ball is blocked by solid particles or debris, the valve stem is not closed in place, and the torque exceeds the set value, it will be transmitted to the control center via Ethernet or wirelessly to realize real-time monitoring of the valve opening and closing status, issue a shutdown warning, and protect the system safety.

[0022] The cross-section of the pressure self-tightening gasket 9 is T-shaped. The pressure of the medium acts on the inner circumferential surface of the pressure self-tightening gasket 9, so that the two sides of the outer ring of the gasket are firmly embedded between the two valve bodies. The greater the medium pressure, the better the sealing effect.

[0023] The valve body 8 is also equipped with a pressure sensor 11 for detecting the internal pressure of the valve body; the valve seat 10 adopts a BID-1 double valve seat, and each valve seat adopts a bidirectional sealing structure; when the pressure in the middle cavity rises abnormally to 1.33 times PN (design pressure), the pressure sensor will automatically alarm to ensure system safety.

[0024] The middle valve body 8 is connected to the left valve body 6 and the right valve body 7 by bolts 12 and wedge-type eccentric anti-rotation nuts 13, as shown in the figure. The wedge-type eccentric anti-rotation nuts are divided into an eccentric upper nut and a lower nut, which have a good loosening effect and ensure the stability of the structure. The wedge-type eccentric anti-rotation nuts are purchased parts, and their specific working principle will not be elaborated here.

[0025] It also includes a stuffing box 14 and a stuffing gland 15. A fastener 16 is provided between the stuffing gland 15 and the middle valve body 8 to connect the two. A resistance element 17 is provided on the fastener. The resistance element 17 is connected to a resistance strain gauge (not shown) through a wire. The fastener is a clamping stud. A resistance element is attached to the outer circle of the clamping stud of the stuffing gland and connected to the resistance strain gauge. Once the stuffing box is damaged, the clamping tightness of the stuffing gland decreases, and the tensile stress of the clamping stud will decrease. When it decreases to a set value, an alarm will be triggered, and the stuffing box needs to be replenished.

[0026] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] Please note to all technical personnel: Although this utility model has been described according to the specific embodiments above, the inventive concept of this utility model is not limited to this utility model. Any modifications that utilize the inventive concept will be included within the scope of protection of this patent.

Claims

1. A smart control ball valve for offshore drilling platforms, comprising a valve body, a valve core (1), a valve stem (2), a valve seat (10), and an actuator connected to the valve stem (2), characterized in that: The actuator includes a worm gear assembly (3) and a handwheel (4) that are linked together, and a static torque sensor (5) disposed between the worm gear assembly (3) and the handwheel (4). The valve body includes a left valve body (6), a right valve body (7), and a middle valve body (8) that is fixedly installed between the left valve body (6) and the right valve body (7). Pressure self-tightening sealing gaskets (9) are respectively provided between the middle valve body (8) and the left valve body (6) and the right valve body (7).

2. The intelligent control ball valve for offshore drilling platforms according to claim 1, characterized in that: The cross-section of the pressure self-tightening gasket (9) is T-shaped.

3. The intelligent control ball valve for offshore drilling platforms according to claim 1, characterized in that: The valve seat (10) adopts a BID-1 double valve seat, and each valve seat adopts a bidirectional sealing structure.

4. The intelligent control ball valve for offshore drilling platforms according to claim 1, characterized in that: The valve body (8) is also equipped with a pressure sensor (11) for detecting the internal pressure of the valve body.

5. The intelligent control ball valve for offshore drilling platforms according to claim 1, characterized in that: The middle valve body (8) is connected to the left valve body (6) and the right valve body (7) by bolts (12) and wedge-type eccentric anti-rotation nuts (13).

6. The intelligent control ball valve for offshore drilling platforms according to claim 1, characterized in that: It also includes a stuffing box (14) and a stuffing gland (15). A fastener (16) is provided between the stuffing gland (15) and the middle valve body (8) to connect the two. A resistance element (17) is provided on the fastener. The resistance element (17) is connected to a resistance strain gauge through a wire.

7. The intelligent control ball valve for offshore drilling platforms according to claim 1, characterized in that: The worm gear assembly (3) is provided with a first linkage shaft (19), the handwheel (4) is provided with a second linkage shaft (20), and a bushing (21) is provided between the first linkage shaft (19) and the second linkage shaft (20) to link the two.

8. The intelligent control ball valve for offshore drilling platforms according to claim 7, characterized in that: The static torque sensor (5) is mounted on the second linkage shaft (20).

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