Multi-way valve for offshore platforms and control method

Abstract

The application discloses a multi-way valve for offshore platform and a control method. A joint groove is arranged on the inner wall of the valve body corresponding to a bowl structure, and the bowl structure is swing-connected to a side pipe. The multi-way valve for offshore platform and the control method provide a sealing force and a reset force by pressing the bowl structure to the joint groove through an elastic member. A telescopic drive, which is driven by the inner pipe and is pneumatic or hydraulic, is arranged on the plug. The working pipeline of the telescopic drive is connected to the outside of the valve body along the upper end of the plug, so that a gas source or a hydraulic source is arranged outside the valve body to control the telescopic drive and the bowl structure. In the working process, a sensing part is arranged at the position of the side pipe to test the dynamic state of the bowl structure. A rotary drive is started to work and is transferred to the side pipe part with the sensing part. The working of the telescopic drive is controlled. At this time, the synchronous performance of the pressure sensing data of the four pressure sensors directly reflects the docking state between the inner pipe of the plug and the bowl structure, and reflects the abnormality of the rotation angle or the installation angle of the side pipe part.

Description

Technical Field

[0001] This invention relates to the field of multi-way valves, and particularly to a multi-way valve and control method for offshore platforms. Background Technology

[0002] Multi-way valves, as devices used to control the direction of fluid flow or distribute fluid, fall under the category of mechanical engineering and fluid control systems. They are commonly used in hydraulic systems, pneumatic systems, and chemical equipment, enabling switching and flow distribution between multiple pipelines. A common operating mode for multi-way valves is rotary switching; these are also known as plug valves. They open or close by rotating the plug to connect or separate the passage on the valve body. The plug can be cylindrical or conical. The working principle of a plug valve is to change the size and direction of the plug passage by rotating the plug, thereby regulating and cutting off the fluid flow. Plug valves are easily adaptable to multi-channel structures; if multiple side connectors are provided on the outer circumference of the valve body, rotation of the plug allows for connection to different side connectors.

[0003] Given the need for docking between the valve plug and different side connectors, the accuracy of this docking directly affects the valve's operation. In the operating environment of offshore platforms, where pressures are high, the docking process between the valve plug and side connectors becomes even more critical. Current docking structures are complex (e.g., telescopic structures), and the docking process can easily damage the sealing surfaces. Furthermore, there is a lack of monitoring of the fit between the valve plug and the side connectors. Summary of the Invention

[0004] The main objective of this invention is to provide a multi-way valve and control method for offshore platforms, aiming to solve the problems of complex docking structures in multi-way valves, easy damage to the sealing surface during docking, and lack of monitoring of the fit between the valve plug and the side connector.

[0005] To achieve the above objectives, the present invention provides a multi-way valve for offshore platforms, comprising:

[0006] The valve body has a bottom connecting pipe and multiple side pipes arranged circumferentially. Each side pipe is axially conductive and includes a side connecting pipe, a cup structure, and an elastic element. A joint groove is provided on the inner wall of the valve body corresponding to the cup structure. The cup structure is oscillatingly connected to the side connecting pipe. The elastic element is disposed between the side connecting pipe and the cup structure to press the cup structure towards the joint groove. Four detection channels are provided on the outer wall of the valve body corresponding to the cup structure, which are evenly distributed circumferentially along the central axis of the side pipes.

[0007] A stopcock is rotatably mounted on the upper end of the lower connecting pipe and extends through the valve body. An inner connecting pipe is telescopically mounted on the outer wall of the stopcock. A telescopic drive, which is pneumatic or hydraulic, is provided on the stopcock to drive the inner connecting pipe. The working pipe of the telescopic drive extends along the upper end of the stopcock to the valve body. When the stopcock rotates, it aligns the lower connecting pipe with the side pipe. At this time, the telescopic drive drives the inner connecting pipe to engage with the side pipe, thereby connecting the lower connecting pipe with the side pipe.

[0008] At least one sensing unit is provided, which includes four pressure sensors corresponding to the side tube portion. The pressure sensors are detachably connected to the detection channel. When the pressure sensors are combined with the detection channel, the test end of the pressure sensors is in contact with and perpendicular to the bowl structure.

[0009] The rotary actuator is positioned at the upper end of the valve to drive its rotation.

[0010] Furthermore, the number of the sensing units is the same as the number of the side tube units.

[0011] Furthermore, the four detection channels are located above, below, and to the left and right of the side tube, respectively.

[0012] Furthermore, the telescopic drive and the inner tube are respectively arranged opposite to each other in the circumferential direction of the valve, and the output end of the telescopic drive is disposed inside the valve and connected to the inner tube.

[0013] Furthermore, the telescopic drive includes an inlet pipe and an outlet pipe, which are connected to the lower ends of the inlet pipe and the outlet pipe when the telescopic drive is installed on the valve.

[0014] The present invention also provides a control method applied to the above-mentioned multi-way valve for offshore platforms, the control method comprising:

[0015] S1. Continuously receive the four pressure sensors in the sensing unit at the side tube section, and record the first stable sensing data of the four pressure sensors;

[0016] S2. Drive the stopcock to rotate to the position of the side tube section;

[0017] S3. Control the telescopic drive to connect the inner tube to the side tube and record the second stable sensing data of the four pressure sensors in the sensing unit.

[0018] S4. Calculate the difference between the second stable sensing data and the first stable sensing data corresponding to the pressure sensor to obtain four first pressure difference values;

[0019] S5. Based on the relationship between the four first pressure differences, evaluate the docking status of the side pipe and the inner pipe.

[0020] Furthermore, the number of the sensing units is the same as the number of the side tube units, and step S5 is followed by:

[0021] S6. Perform steps S1 to S5 once for each of the side tube sections.

[0022] Furthermore, step S6 is followed by:

[0023] S7. Evaluate and determine the installation status of the multi-way valve for the offshore platform based on the docking status of each side pipe section and the inner pipe section.

[0024] Furthermore, step S3 is followed by:

[0025] S301. Control the position where the stopcock rotates away from the side tube and record the third stable sensing data of the four pressure sensors in the sensing unit;

[0026] S302. Calculate the difference between the first stable sensing data and the third stable sensing data corresponding to the pressure sensor to obtain four second pressure differences;

[0027] S303. Determine the reset status of the side tube based on the magnitude of the four second pressure differences.

[0028] Furthermore, step S3 is followed by:

[0029] S311. Obtain the sensing data set during the operation of the pressure sensor described in step S3;

[0030] S311. Based on the differences in the changing trends of the four sensor datasets, a state evaluation of the bowl structure is given.

[0031] The multi-way valve and control method for marine platforms provided by this invention have a joint groove on the inner wall of the valve body corresponding to the bowl structure. The bowl structure is oscillatingly connected to the side pipe. An elastic element is set between the side pipe and the bowl structure to press the bowl structure towards the joint groove, providing sealing force and reset force. The valve body is equipped with a pneumatic or hydraulic telescopic drive for driving the inner pipe. The working pipe of the telescopic drive is led out of the valve body along the upper end of the valve body, so that an air source or hydraulic source is set outside the valve body to control the telescopic drive to dock with the bowl structure. During operation, a sensor is installed at the side pipe to test the dynamics of the bowl structure. The rotation drive is started to move to the side pipe with the sensor and control the telescopic drive to work. At this time, the synchronization performance of the pressure sensing data of the four pressure sensors directly reflects the docking status between the inner pipe and the bowl structure on the valve body, and reflects any abnormality in the rotation angle or the installation angle of the side pipe. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a multi-way valve for offshore platforms according to the first embodiment of the present invention;

[0033] Figure 2 This is a cross-sectional view of the valve body in the first embodiment of the multi-way valve for offshore platforms of the present invention;

[0034] Figure 3 This is a cross-sectional view of a multi-way valve for offshore platforms according to the first embodiment of the present invention;

[0035] Figure 4 yes Figure 3 A local magnification.

[0036] Reference numerals: 100-valve body, 110-lower pipe, 120-side pipe, 121-side pipe, 122-bowl structure, 123-elastic element, 130-joint groove, 140-detection channel, 200-stop valve, 210-inner pipe, 220-telescopic drive, 211-inlet pipe, 212-outlet pipe, 310-pressure sensor. Detailed Implementation

[0037] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any of the units and all combinations of one or more associated listed items.

[0039] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0040] Reference Figures 1 to 4 In one embodiment of the present invention, a multi-way valve for an offshore platform includes:

[0041] A valve body 100 has a lower connecting pipe 110 at the bottom. The valve body 100 has multiple side pipe sections 120 arranged circumferentially. Each side pipe section 120 is axially conductive and includes a side connecting pipe 121, a bowl structure 122, and an elastic element 123. The inner wall of the valve body 100 has a joint groove 130 corresponding to the bowl structure 122. The bowl structure 122 is oscillatingly connected to the side connecting pipe 121. The elastic element 123 is disposed between the side connecting pipe 121 and the bowl structure 122 to press the bowl structure 122 toward the joint groove 130. The outer wall of the valve body 100 has four detection channels 140 that are evenly distributed circumferentially along the central axis of the side pipe section 120, corresponding to the bowl structure 122.

[0042] A stopcock 200 is rotatably mounted on the upper end of the lower connecting pipe 110 and extends through the valve body 100. An inner connecting pipe 210 is telescopically mounted on the outer wall of the stopcock 200. A telescopic drive 220, which is pneumatic or hydraulic, is provided on the stopcock 200 to drive the inner connecting pipe 210. The working pipe of the telescopic drive 220 extends along the upper end of the stopcock 200 to the outside of the valve body 100. When the stopcock 200 rotates, it aligns the lower connecting pipe 110 with the side pipe 120. At this time, the telescopic drive 220 drives the inner connecting pipe 210 to engage with the side pipe 120, thereby connecting the lower connecting pipe 110 with the side pipe 120.

[0043] At least one sensing unit is provided corresponding to the side tube 120 and includes four pressure sensors 310. The pressure sensors 310 are detachably connected to the detection channel 140. When the pressure sensors 310 are combined with the detection channel 140, the test end of the pressure sensors 310 is in contact with and perpendicular to the bowl structure 122.

[0044] The rotating driver is driven to rotate, corresponding to the upper end of the valve 200.

[0045] In the existing technology, the docking structure used in multi-way valves is relatively complex. At the same time, the docking process is prone to damage to the sealing surface, and there is a lack of monitoring of the fit between the valve plug and the side connector.

[0046] The multi-way valve for marine platforms provided by the present invention includes a valve body 100, a plug 200, a sensing unit, and a rotary actuator.

[0047] A lower connecting pipe 110 is provided at the bottom of the valve body 100, and the lower connecting pipe 110 leads into the valve body 100. Multiple side pipe sections 120 are mounted circumferentially on the valve body 100. The side pipe sections 120 are axially connected, allowing fluid to pass through the central axis. It should be noted that the connection is not limited to the physical central axis, but rather can be formed within a range of the central axis position. The side pipe section 120 includes a side connecting pipe 121, a cup structure 122, and an elastic element 123. A joint groove 130 is provided on the inner wall of the valve body 100 corresponding to the cup structure 122. The cup structure 122 is oscillatingly connected to the side connecting pipe 121, and the oscillation range of the cup structure 122 forms a cone. The elastic element 123 is disposed between the side connecting pipe 121 and the cup structure 122, pressing the cup structure 122 towards the joint groove 130. For example, a fixing bracket is provided on the side pipe 121, and a fixing shaft extending towards the bowl structure 122 is mounted on the fixing bracket. An elastic element 123 is disposed between the fixing shaft and the fixing bracket, so that the bowl structure 122 is pressed against the joint groove 130 under the elastic force of the elastic element 123, providing sealing force and reset force. Four detection channels 140 are provided on the outer wall of the valve body 100 corresponding to the bowl structure 122, which are evenly distributed circumferentially along the central axis of the side pipe 120. Fixing bolts are detachably installed on the detection channels 140, and a seal is formed after the fixing bolts are installed.

[0048] A stopcock 200 is rotatably mounted on the upper end of the lower connecting pipe 110, with its upper end extending out of the valve body 100. An inner connecting pipe 210 is telescopically mounted on the outer wall of the stopcock 200. A telescopic actuator 220, which drives the inner connecting pipe 210, is provided on the stopcock 200 and is pneumatically or hydraulically actuated. For example, the stopcock 200 has a horizontal pipe in the radial direction, the inner connecting pipe 210 is slidably mounted on one end of the horizontal pipe, and the telescopic actuator 220 is mounted on the other end of the horizontal pipe; a vertical pipe is provided at the bottom of the stopcock 200, which connects to the lower connecting pipe 110, forming a communication between the vertical pipe and the horizontal pipe. The working pipe of the telescopic actuator 220 extends along the upper end of the stopcock 200 to the outside of the valve body 100, thereby allowing a pneumatic or hydraulic source to be provided outside the valve body 100 to control the operation of the telescopic actuator 220. Rotating the stopcock 200 aligns the lower pipe 110 with the side pipe 120. At this time, the telescopic drive 220 drives the inner pipe 210 to dock with the side pipe 120, thus connecting the lower pipe 110 and the side pipe 120.

[0049] At least one sensing unit is used to monitor the installation and operation of the multi-way valve for offshore platforms. One sensing unit can be installed for each side pipe section 120, or one sensing unit can be installed for each of the side pipe sections 120, thus achieving real-time and comprehensive monitoring. The sensing unit, corresponding to each side pipe section 120, includes four pressure sensors 310. The pressure sensors 310 are detachably connected to the detection channel 140. When the detection channel 140 is not equipped with pressure sensors 310, it is sealed by mounting bolts. When the pressure sensors 310 are connected to the detection channel 140, the test end of the pressure sensor 310 contacts the bowl structure 122. It should be noted that the test end of the pressure sensor 310 is not limited to making exact contact or contact with a specific pressure with the bowl structure 122. After the pressure sensor 310 contacts the bowl structure 122, the sensing data of the pressure sensor 310 can be calibrated to zero, thus providing a basis for operation.

[0050] The rotary driver is positioned at the upper end of the rotary valve 200 to drive its rotation. The type of rotary driver is not limited, as long as it can perform accurate rotation angle output; for example, it can be a servo motor equipped with a circular grating.

[0051] Considering that the rotation angle of the cock 200 may not be perfectly aligned with the side tube 120, especially during initial installation or after prolonged use, the possibility of the cock 200 deviating from the correct angle increases. Therefore, during operation, a sensing unit can be installed on the side tube 120, and the initial data of the pressure sensor 310 in the sensing unit can be zeroed. At this time, the rotation drive is activated and moved to the side tube 120 with the sensing unit, controlling the telescopic drive 220 to operate. The synchronization performance of the pressure sensing data of the four pressure sensors 310 directly reflects the docking status between the inner tube 210 and the cup structure 122 on the cock 200. It should be noted that, due to the presence of the working pipe of the telescopic drive 220, the rotation mode and range of the cock 200 need to be limited during operation to avoid excessive twisting of the external connecting pipe.

[0052] In summary, a joint groove 130 is provided on the inner wall of the valve body 100 corresponding to the bowl structure 122. The bowl structure 122 is oscillatingly connected to the side pipe 121. An elastic element 123 is disposed between the side pipe 121 and the bowl structure 122 to press the bowl structure 122 toward the joint groove 130, providing sealing force and reset force. A telescopic drive 220, which is pneumatic or hydraulic, is provided on the stopcock 200 to drive the inner pipe 210. The working pipe of the telescopic drive 220 is led along the upper end of the stopcock 200 to the outside of the valve body 100, thereby providing a telescopic drive 220 on the outside of the valve body 100. An air or hydraulic source controls the telescopic drive 220 to dock with the bowl structure 122. During operation, a sensor is installed at the side tube 120 to test the dynamics of the bowl structure 122. The rotation drive is started to move to the side tube 120 with the sensor, and the telescopic drive 220 is controlled to work. At this time, the synchronization performance of the pressure sensing data of the four pressure sensors 310 directly reflects the docking status between the inner tube 210 on the valve 200 and the bowl structure 122, and reflects any abnormality in the rotation angle or the installation angle of the side tube 120.

[0053] In one embodiment, the number of the sensing units is the same as the number of the side tubes 120.

[0054] In this embodiment, a sensor is provided at the position of each side pipe section 120, so as to determine the installation status and working status of the entire multi-way valve through the sensing data of each sensor.

[0055] Reference Figure 1 In one embodiment, the four detection channels 140 are located above, below, and to the left and right of the side tube portion 120, respectively.

[0056] In this embodiment, the positions of the four detection channels 140 are defined to more appropriately monitor the connection status of the inner tube 210 and the bowl structure 122. For example, the pressure sensors 310 in the two detection channels 140 on the left and right sides of the side tube 120 can monitor the connection status of the inner tube 210 and the bowl structure 122 in the circumferential (horizontal) direction, while the pressure sensors 310 in the two detection channels 140 on the upper and lower sides of the side tube 120 can monitor the connection status of the inner tube 210 and the bowl structure 122 in the height direction.

[0057] Reference Figures 3 to 4 In one embodiment, the telescopic drive 220 and the inner tube 210 are respectively arranged opposite to each other in the circumferential direction of the valve 200, and the output end of the telescopic drive 220 is disposed inside the valve 200 and connected to the inner tube 210.

[0058] In this embodiment, the installation positions of the telescopic drive 220 and the inner tube 210 are defined. Both the telescopic drive 220 and the inner tube 210 are arranged radially on the valve 200. The output end of the telescopic drive 220 is connected to the inner tube 210, so that the inner tube 210 can perform telescopic actions during the operation of the telescopic drive 220.

[0059] Reference Figures 3 to 4 In one embodiment, the telescopic drive 220 includes an inlet pipe 211 and an outlet pipe 212, which are connected to the lower ends of the inlet pipe 211 and the outlet pipe 212 when the telescopic drive 220 is installed on the valve 200.

[0060] In this embodiment, the telescopic drive 220 is installed in a specific manner. The inlet pipe 211 and outlet pipe 212 extend upwards from the middle of the rotary valve 200 in the height direction to the outside of the valve body 100. When the telescopic drive 220 is connected to the rotary valve 200, it is naturally connected to the lower ends of the inlet pipe 211 and outlet pipe 212, while the upper ends of the inlet pipe 211 and outlet pipe 212 are connected to an external working source (providing working air pressure or working hydraulic pressure).

[0061] The present invention also provides a control method applied to the above-mentioned multi-way valve for offshore platforms, the control method comprising:

[0062] S1. Continuously receive the four pressure sensors 310 in the sensing unit at the side tube 120, and record the first stable sensing data of the four pressure sensors 310.

[0063] S2. Drive the stopcock 200 to rotate to the position of the side tube 120;

[0064] S3. Control the telescopic drive 220 to work, connect the inner tube 210 to the side tube 120, and record the second stable sensing data of the four pressure sensors 310 in the sensing unit.

[0065] S4. Calculate the difference between the second stable sensing data and the first stable sensing data corresponding to the pressure sensor 310 to obtain four first pressure difference values;

[0066] S5. Based on the relationship between the four first pressure differences, evaluate the docking status of the side pipe 120 and the inner pipe 210.

[0067] In this embodiment, in step S1, the four pressure sensors 310 in the sensing section of the side tube 120 are continuously received, and the first stable sensing data of the four pressure sensors 310 is recorded. In the above steps, the sensing data of the pressure sensors 310 are continuously received, and when not connected, the data should be stable, specifically the first stable sensing data. The first stable sensing data of the four pressure sensors 310 are likely to differ due to the installation characteristics of the pressure sensors 310 or the positional characteristics of the bowl structure 122; in some embodiments, the first stable sensing data can be reset to zero for easier management and analysis. In this state, under the action of the elastic member 123, the bowl structure 122 and the side tube 121 should be axially aligned.

[0068] In step S2, the cock 200 is driven to rotate to the position of the side tube 120, at which point the inner tube 210 and the side tube 120 have not yet been fully connected. The precise control of the cock 200's rotation angle can be achieved in various ways, such as using a servo motor or configuring a circular grating.

[0069] In step S3, the telescopic drive 220 is controlled to operate, completing the docking of the inner tube 210 and the side tube 120. A buffer can be set during the docking process to minimize docking damage. The second stable sensing data from the four pressure sensors 310 in the sensing unit is recorded. Since docking is complete at this point, the pressure sensor data should stabilize again.

[0070] In step S4, the difference between the second stable sensing data and the first stable sensing data corresponding to the pressure sensor 310 is calculated to obtain four first pressure difference values.

[0071] In step S5, if the bowl structure 122 does not change angle throughout the docking process, then the differences between the four first pressure differences should be the same. If the inner tube 210 and the side tube 120 are not angularly aligned (horizontally or vertically), then the bowl structure 122 will deflect after docking, and the bowl structure 122 and the side tube 121 will no longer be axially aligned. At this time, the pressure state of the four pressure sensors 310 will differ, resulting in differences between the four first pressure differences. Based on the four first pressure differences, the docking status evaluation of the side tube 120 and the inner tube 210 can be determined in reverse. In a typical implementation, the four pressure sensors 310 are divided into an upper pressure sensor 310, a lower pressure sensor 310, a left pressure sensor 310, and a right pressure sensor 310. If there is a large difference in the first pressure difference between the upper pressure sensor 310 and the lower pressure sensor 310, it is determined that there is a problem with the horizontal alignment of the valve 200. If there is a large difference in the first pressure difference between the left pressure sensor 310 and the right pressure sensor 310, it is determined that there is a problem with the vertical alignment of the valve 200.

[0072] In fact, even if the four detection channels 140 are not located on the top, bottom and left and right sides of the side tube 120 respectively, the control calculation method can still be set, but this increases the complexity and calculation difficulty.

[0073] In one embodiment, the number of sensing units is the same as the number of side tube sections 120, and step S5 is followed by:

[0074] S6. Perform steps S1 to S5 once for each of the side tube sections 120.

[0075] In this embodiment, sensors are installed on all side tube sections 120 in some key application scenarios to monitor the entire working process. Specifically, the docking process between each side tube section 120 and the inner tube section 210 is monitored to provide multiple docking status evaluations. Based on the differences between the multiple docking status evaluations, a further comprehensive evaluation can be given.

[0076] In one embodiment, step S6 is followed by:

[0077] S7. Evaluate and determine the installation status of the multi-way valve for the offshore platform based on the docking status of each side pipe section 120 and the inner pipe section 210.

[0078] In this embodiment, if all docking status evaluations show abnormalities, it indicates that there is a problem with the installation or use of the plug 200. If only a few abnormal data are found in all docking status evaluations, it indicates that there is a problem with the installation or use of the side tube 120.

[0079] In one embodiment, step S3 is followed by:

[0080] S301. Control the stopcock 200 to rotate away from the side tube 120 and record the third stable sensing data of the four pressure sensors 310 in the sensing unit;

[0081] S302. Calculate the difference between the first stable sensing data and the third stable sensing data corresponding to the pressure sensor 310 to obtain four second pressure differences.

[0082] S303. Determine the reset status of the side tube 120 based on the magnitude of the four second pressure differences.

[0083] In this embodiment, considering that the first stable sensing data is the data from the pre-drilled sensing unit and the third stable sensing data is the data from the post-drilled sensing unit, the difference between the two should be very small under normal circumstances. If any of the four second pressure differences becomes too large, it indicates that there is a problem with the resetting of the upper bowl structure 122 of the side tube 120, and maintenance is required.

[0084] In one embodiment, step S3 is followed by:

[0085] S311. Obtain the sensing data set during the operation of the pressure sensor 310 described in step S3;

[0086] S311. Based on the differences in the changing trends of the four sensor datasets, a state evaluation of the bowl structure 122 is given.

[0087] In this embodiment, if the bowl structure 122 remains axially aligned with the side pipe 121 during the docking process, the changing trends of the four sensor data sets should be consistent; however, if the bowl structure 122 deflects during the docking process, the changing trends of the four sensor data sets should exhibit certain differences. Based on the four sensor data sets and the differences between them, the swing state of the bowl structure 122 during the docking process can be analyzed and determined.

[0088] In summary, the multi-way valve and control method for marine platforms provided by this invention have a joint groove 130 on the inner wall of the valve body 100 corresponding to the bowl structure 122. The bowl structure 122 is oscillatingly connected to the side pipe 121. An elastic element 123 is disposed between the side pipe 121 and the bowl structure 122 to press the bowl structure 122 towards the joint groove 130, providing sealing force and reset force. The stopcock 200 is provided with a pneumatic or hydraulic telescopic drive 220 that drives the inner pipe 210. The working pipe of the telescopic drive 220 extends along the upper end of the stopcock 200 to the outside of the valve body 100. Thus, an air source or hydraulic source is set outside the valve body 100 to control the telescopic drive 220 to dock with the bowl structure 122. During operation, a sensor is installed at the side tube 120 to test the dynamics of the bowl structure 122. The rotary drive is started to move to the side tube 120 with the sensor and control the telescopic drive 220 to work. At this time, the synchronization performance of the pressure sensing data of the four pressure sensors 310 directly reflects the docking status between the inner tube 210 on the valve 200 and the bowl structure 122, and reflects any abnormality in the rotation angle or the installation angle of the side tube 120.

[0089] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A multi-way valve for offshore platform, comprising: a valve body, a lower end of which is provided with a lower connector, and a plurality of side pipe sections are circumferentially arranged on the valve body, the side pipe sections are axially communicated and comprise a side connector, a bowl structure and an elastic member, a joint groove is arranged on an inner wall of the valve body corresponding to the bowl structure, the bowl structure is swingably connected to the side connector, the elastic member is arranged between the side connector and the bowl structure to press the bowl structure towards the joint groove, and four detection channels are arranged on an outer wall of the valve body corresponding to the bowl structure and uniformly distributed in a circumferential direction of a central axis of the side pipe sections; a plug, which is rotatably arranged on an upper end of the lower connector and protrudes out of the valve body, an inner connector is telescopically arranged on an outer wall of the plug, a telescopic drive is arranged on the plug and driven by gas or liquid, and a working pipeline of the telescopic drive is communicated to an outside of the valve body along an upper end of the plug, wherein the plug is rotated to align the lower connector with the side pipe sections, and the telescopic drive drives the inner connector to be connected with the side pipe sections to communicate the lower connector with the side pipe sections; at least one sensing section, which comprises four pressure sensors arranged corresponding to the side pipe sections, the pressure sensors are detachably connected with the detection channels, and when the pressure sensors are combined with the detection channels, test ends of the pressure sensors are in contact with and perpendicular to the bowl structure; a rotary drive, which is arranged corresponding to the upper end of the plug to drive rotation.

2. The multiplex valve for an offshore platform according to claim 1, characterized by The number of the sensing sections is consistent with the number of the side pipe sections.

3. The multiplex valve for an offshore platform according to claim 1, wherein The four detection channels are respectively arranged above and below and left and right of the side pipe sections.

4. The multiplex valve for an offshore platform according to claim 1, wherein The telescopic drive and the inner connector are oppositely arranged in a circumferential direction of the plug, an output end of the telescopic drive is arranged in the plug and connected to the inner connector.

5. The multiplex valve for an offshore platform according to claim 4, wherein The telescopic drive comprises an inlet pipeline and an outlet pipeline, and the lower ends of the inlet pipeline and the outlet pipeline are connected when the telescopic drive is installed on the plug.

6. A control method applied to the multiplex valve for offshore platforms according to claim 3, characterized in that, The control method comprises: S1, continuously receiving four pressure sensors in the sensing section at the side pipe section and recording first stable sensing data of the four pressure sensors; S2, driving the plug to rotate to a position of the side pipe section; S3, controlling the telescopic drive to work, completing connection of the inner connector with the side pipe section, and recording second stable sensing data of the four pressure sensors in the sensing section; S4, calculating a difference between the second stable sensing data and the first stable sensing data corresponding to the pressure sensors to obtain four first pressure differences; S5, judging and giving an evaluation of a connection state of the side pipe section and the inner connector according to a relationship between the four first pressure differences.

7. The control method according to claim 6, characterized by The number of the sensing sections is consistent with the number of the side pipe sections, and the step S5 comprises: S6, performing the steps S1 to S5 once for each side pipe section.

8. The control method according to claim 7, characterized by, The step S6 comprises: S7, judging an installation state of the multi-way valve for offshore platform according to the evaluation of the connection state of each side pipe section and the inner connector.

9. The control method according to claim 6, characterized by, The step S3 comprises: S301. Control the position where the stopcock rotates away from the side tube and record the third stable sensing data of the four pressure sensors in the sensing unit; S302. Calculate the difference between the first stable sensing data and the third stable sensing data corresponding to the pressure sensor to obtain four second pressure differences; S303. Determine the reset status of the side tube based on the magnitude of the four second pressure differences.

10. The control method according to claim 6, characterized by, The step S3 is followed by: S311. Obtain the sensing data set during the operation of the pressure sensor described in step S3; S311. Based on the differences in the changing trends of the four sensor datasets, a state evaluation of the bowl structure is given.

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