Pile washing system of ocean platform

Abstract

The invention relates to a pile washing-out system of an ocean platform. The pile washing-out system comprises a water inlet header pipe, a pile washing-out pump, a pile washing-out header pipe, a control cable and a winch assembly. The water inlet header pipe is arranged on the pile leg and extends in the height direction of the pile leg, at least two water inlet branches with different water levels are arranged on the water inlet header pipe, and a water inlet valve is arranged on each water inlet branch. The pile washing pump is fixedly installed on the pile leg, and the water inlet end is connected with the water inlet header pipe. One end of the pile washing main pipe is connected with the water outlet end of the pile washing pump, and the other end of the pile washing main pipe is connected to the pile washing nozzle. The control cable is at least partially and fixedly installed on the pile leg and electrically connected with the pile washing pump, and the end, away from the pile washing pump, of the control cable is used for being connected to a control device on the platform body. The winch assembly is used for winding and unwinding a control cable. The pile washing-out system is easy to operate and high in pile washing-out efficiency, the platform pile pulling period can be greatly shortened, allocation of pile pulling workers is reduced, manpower and time cost is reduced, and the platform operation economical efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore engineering platforms, and particularly relates to a pile driving system for an offshore platform. Background Art

[0002] The platform pile driving system is applied to a jack-up offshore platform. Before pile pulling operation, it scours the seabed soil layer on the surface of the pile shoe to eliminate the adsorption resistance between the pile shoe and the soil layer, so as to facilitate pulling out the pile shoe from the seabed soil layer.

[0003] The traditional platform pile driving system is divided into two major parts: the platform body and the leg pile shoes according to different areas of pipeline layout. The traditional platform pile driving system is connected between these two parts by a pile driving hose. When the platform pile driving system is in a non-working state, the pile driving hose needs to be removed. When the platform pile driving system is performing pile driving operation, a large number of crew members are required to manually connect the pile driving hose in the pile driving areas where the four legs are located at the same time. And when the leg is lifted by a certain height, the pile driving hose needs to be disassembled and reinstalled to avoid the pile driving hose becoming non-removable after rising with the leg by a certain height. Therefore, during the pile pulling operation of the platform, a large number of operators need to be equipped and the pile pulling operation efficiency is low. The low pile pulling operation efficiency seriously affects the pile pulling operation duration of the platform. Coupled with the factor of unstable sea conditions, the pile pulling cycle will be further extended. In addition, if one of the legs of the platform is pulled out and the other legs are not pulled out, it will cause the platform to lose its center of gravity and result in catastrophic consequences. Summary of the Invention

[0004] An object of the present invention is to solve the deficiencies in the prior art, and provide a pile driving system for an offshore platform. To solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A pile driving system for an offshore platform, the offshore platform includes a platform main body, legs and pile shoes, and a pile driving nozzle is provided on the pile shoe. The pile driving system includes:

[0006] A main water inlet pipe, which is arranged on the leg and extends along the height direction of the leg. At least two water inlet branches with different water level heights are provided on the main water inlet pipe, and a water inlet valve is respectively provided on each water inlet branch;

[0007] A pile driving pump, which is fixedly installed on the leg. The water inlet end of the pile driving pump is connected to the main water inlet pipe, and the pile driving pump is used to suck seawater through each water inlet branch;

[0008] A main pile driving pipe, which is arranged on the leg. One end of the main pile driving pipe is connected to the water outlet end of the pile driving pump, and the other end of the main pile driving pipe is connected to the pile driving nozzle;

[0009] A control cable, at least part of which is fixedly installed on the leg and electrically connected to the flushing pump. The end of the control cable far from the flushing pump is used to connect to the control device on the platform main body;

[0010] A winch assembly, which is arranged on the platform main body and is used for winding and unwinding the control cable.

[0011] In one embodiment, a first detection sensor and a second detection sensor are respectively arranged at the water inlet end and the water outlet end of the flushing pump. The first detection sensor and the second detection sensor are electrically connected to the control device through the control cable. The first detection sensor is used to detect the inlet water pressure and / or flow rate of the flushing pump, and the second detection sensor is used to detect the outlet water pressure and / or flow rate of the flushing pump.

[0012] In one embodiment, the flushing system further includes a filter, which is arranged between the inlet main pipe and the flushing pump and is used for filtering the seawater entering the flushing pump.

[0013] In one embodiment, a third detection sensor is arranged on the pipeline on the water inlet side of the filter. The third detection sensor is electrically connected to the control device through the control cable, and the third detection sensor is used to detect the inlet water pressure and / or flow rate of the filter.

[0014] In one embodiment, the flushing pump adopts a submersible seawater pump.

[0015] In one embodiment, three water inlet branches are arranged at intervals along the height direction of the leg on the inlet main pipe. The three water inlet branches are respectively a high-level water inlet branch, a middle-level water inlet branch and a low-level water inlet branch with gradually decreasing heights; and / or

[0016] Water inlet gratings are respectively arranged at the water inlets of each water inlet branch.

[0017] In one embodiment, a check valve is arranged on the flushing main pipe; and / or

[0018] A stop valve is arranged on the flushing main pipe.

[0019] In one embodiment, the control cable has a first end and a second end. A guide pulley is arranged on the leg. The first end of the control cable bypasses the guide pulley and is connected to the flushing pump. The part of the control cable between the flushing pump and the guide pulley is fixedly installed on the leg;

[0020] The winch assembly includes a winch, which is rotatably arranged on the platform main body. The second end of the control cable is wound on the winch in a retractable manner and is connected to the control device.

[0021] In one embodiment, the flushing system further includes an emergency flushing pipeline, which is arranged on the leg and is used to connect the platform fire water pipeline and the flushing nozzle;

[0022] An emergency pile driving pipeline is provided with a connecting branch, which is used for detachably connecting with the platform fire water pipeline, and a control valve is arranged on the connecting branch.

[0023] In one embodiment, the emergency pile driving pipeline is vertically arranged on the leg, and there are multiple groups of connecting branches, and the multiple groups of connecting branches are arranged at intervals along the length extension direction of the emergency pile driving pipeline.

[0024] It can be seen from the above technical solutions that the present invention has at least the following advantages and positive effects:

[0025] In the present invention, the pile driving system includes a water inlet main pipe, a pile driving pump, a pile driving main pipe, a control cable and a winch assembly. The water inlet main pipe is arranged on the leg and extends along the height direction of the leg. At least two water inlet branches with different water level heights are arranged on the water inlet main pipe, and water inlet valves are respectively arranged on each water inlet branch. The pile driving pump is fixedly installed on the leg, and its water inlet end is connected to the water inlet main pipe. The pile driving main pipe is arranged on the leg, one end of the pile driving main pipe is connected to the water outlet end of the pile driving pump, and the other end of the pile driving main pipe is connected to the pile driving nozzle. The control cable is at least partially fixedly installed on the leg and is electrically connected to the pile driving pump. The end of the control cable far away from the pile driving pump is used for connecting to a control device on the platform main body. The winch assembly is used for taking in and paying out the control cable.

[0026] During the pile driving operation, the pile driving system can directly take seawater for pile driving through the water inlet main pipe, the pile driving pump and the pile driving main pipe arranged on the leg. The operator only needs to open the water inlet valves on the corresponding water inlet branches and start the pile driving pump, so that the pile driving pump can suck seawater and pump the seawater to the pile driving main pipe and the pile driving nozzle in the pile shoe, realizing the destruction of the soil adsorption force and the vacuum layer at the bottom of the pile shoe, so that the leg can be smoothly pulled out. Compared with the traditional pile pulling operation that requires manual connection of the pile driving hose by personnel, the operation of the pile driving system of the offshore platform of the present invention is simpler, the pile driving efficiency is higher, and it is not affected by sea conditions, so that the platform pile pulling cycle can be greatly shortened, the number of pile pulling operation personnel can be reduced, the labor and time costs can be reduced, and the platform operation economy can be improved.

[0027] In addition, the pile driving system connects the pile driving pump with the control device through the control cable, and the control device can centrally control the pile driving operations of multiple legs of the platform to ensure that the four legs can carry out pile driving and pile pulling synchronously. Thus, it can not only improve the operation efficiency of pile driving and pile pulling, but also help to ensure the synchronous pile pulling of the four legs, avoiding disasters and risks such as the platform losing its center of gravity caused by asynchronous pile pulling. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of a pile driving system of an offshore platform according to an embodiment of the present invention.

[0029] Figure 2 is Figure 1 A schematic diagram of the pipeline layout of the pile driving system in the structure shown.

[0030] The description of the reference numerals in the drawings is as follows:

[0031] 100 - Platform main body; 101 - Fire water pipeline; 200 - Leg; 201 - Guide plate; 300 - Shoe; 301 - Pile driving pipeline; 302 - Pile driving nozzle; 400 - Control device;

[0032] 10 - Main water inlet pipe; 11 - Water inlet branch; 111 - High - level water inlet branch; 112 - Middle - level water inlet branch; 113 - Low - level water inlet branch; 12 - Water inlet valve; 13 - Water inlet grille;

[0033] 20 - Pile driving pump; 21 - First detection sensor; 22 - Second detection sensor;

[0034] 30 - Main pile driving pipe; 31 - Check valve; 32 - Globe valve;

[0035] 40 - Control cable; 50 - Winch assembly; 51 - Winch;

[0036] 60 - Filter; 61 - Third detection sensor;

[0037] 70 - Emergency pile driving pipeline; 71 - Connecting branch; 711 - Connecting joint; 72 - Control valve; 73 - Check valve; 74 - Connecting hose. Detailed implementation manners

[0038] Typical implementation manners embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different implementation manners, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are for illustrative purposes in nature and not intended to limit the present invention.

[0039] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indication of the direction or position relationship (such as up, down, left, right, front, and back, etc.) is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. When these elements are in the positions shown in the drawings, these descriptions are appropriate. If the description of the positions of these elements changes, then the indication of these directions also changes accordingly.

[0040] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0041] Generally, when a jack-up platform reaches the working position, the legs extend down to the seabed, stand on the seabed, use the legs to lift the main hull, and keep the bottom of the main hull a certain distance away from the sea surface. After the operation of the jack-up platform is completed, the legs need to be retracted so that the platform can switch from the lifting state to the floating state and can sail to the next working position.

[0042] The pile flushing system of the offshore platform of the present invention is mainly used to flush the pile shoes inserted into the seabed of a jack-up platform after the operation is completed, so as to pull out the legs.

[0043] Please refer to Figure 1 As shown, for the pile flushing system of the offshore platform according to an embodiment of the present invention, wherein the offshore platform may be an offshore jack-up gas compression platform, a jack-up drilling platform and other jack-up offshore engineering platforms. Exemplarily, the offshore platform includes a platform body 100, legs 200 and pile shoes 300, and a pile flushing nozzle 302 is provided on the pile shoe 300. Among them, the platform body 100 may be provided with four legs 200. The platform body 100 can climb and descend along each leg 200 under the action of a lifting system. A pile shoe 300 is provided at the bottom of each leg 200.

[0044] A pile flushing pipeline 301 is arranged in each pile shoe 300, and a pile flushing nozzle 302 is provided at each outlet of the pile flushing pipeline 301.

[0045] Refer to Figure 1 and Figure 2As shown in the figure, the pile washing system includes a main water inlet pipe 10, a pile washing pump 20, a main pile washing pipe 30, a control cable 40, and a winch assembly 50. Among them, the main water inlet pipe 10 is arranged on the leg 200 and extends along the height direction of the leg 200. At least two water inlet branches 11 with different water level heights are provided on the main water inlet pipe 10, and water inlet valves 12 are respectively provided on each water inlet branch 11. The pile washing pump 20 is fixedly installed on the leg 200, the water inlet end of the pile washing pump 20 is connected to the main water inlet pipe 10, and the pile washing pump 20 is used to suck seawater through each water inlet branch 11. The main pile washing pipe 30 is arranged on the leg 200, one end of the main pile washing pipe 30 is connected to the water outlet end of the pile washing pump 20, and the other end of the main pile washing pipe 30 is connected to the pile washing nozzle 302. The control cable 40 is at least partially fixedly installed on the leg 200 and is electrically connected to the pile washing pump 20. The end of the control cable 40 far from the pile washing pump 20 is used to connect to the control device 400 on the platform main body 100. The winch assembly 50 is arranged on the platform main body 100 and is used to wind and unwind the control cable 40.

[0046] In the pile washing system of the embodiment of the present invention, during pile washing operation, seawater can be directly taken through the main water inlet pipe 10, the pile washing pump 20, and the main pile washing pipe 30 arranged on the leg 200 for pile washing. The operator only needs to open the water inlet valve 12 on the corresponding water inlet branch 11 and start the pile washing pump 20, so that the pile washing pump 20 can suck seawater and pump the seawater to the pile washing nozzle 302 in the main pile washing pipe 30 and the pile shoe 300, realizing the destruction of the soil adsorption force and the vacuum layer at the bottom of the pile shoe 300, so that the leg 200 can be smoothly pulled out. The pile washing system is more simple to operate, has higher pile washing efficiency, and can be not affected by sea conditions, thereby greatly shortening the platform pile pulling cycle, reducing the allocation of pile pulling operation personnel, reducing labor and time costs, and improving the platform operation economy.

[0047] In addition, the pile washing system connects the pile washing pump 20 with the control device 400 through the control cable 40. The control device 400 can centrally control the pile washing operations of multiple legs 200 of the platform to ensure that the four legs 200 can carry out pile washing and pile pulling synchronously. Thereby, not only can the operation efficiency of pile washing and pile pulling be improved, but also it is beneficial to ensure the synchronous pile pulling of the four legs 200 and avoid disasters and risks such as the platform losing its center of gravity caused by asynchronous pile pulling.

[0048] As Figure 1 shown, the main water inlet pipe 10 can be fixedly installed on the leg 200 vertically. That is, the length extension direction of the main water inlet pipe 10 is consistent with the height direction of the leg 200. When the leg 200 extends into the seawater and stands stably, the main water inlet pipe 10 stands vertically in the seawater.

[0049] It can be understood that in other embodiments, the main water inlet pipe 10 can also be arranged on the leg 200 inclined relative to the vertical direction, which can be determined according to the specific situation.

[0050] As Figure 1 shown, there are at least two water inlet branches 11 with different water level heights on the main water inlet pipe 10. That is to say, there are at least two water inlet branches 11 with relatively higher and relatively lower heights on the main water inlet pipe 10. When the leg 200 extends into the sea water and stands stably, at least the water inlet branch 11 with the lowest height on the main water inlet pipe 10 can be immersed in the sea water so as to suck in sea water through this water inlet branch 11.

[0051] Of course, according to the different working water depths of the jack-up platform, the height of the leg 200 extending into the sea water is also different, then each water inlet branch 11 on the main water inlet pipe 10 can also be all immersed in the sea water, or several water inlet branches 11 with relatively lower heights can be immersed in the sea water, or the water inlet branch 11 with the lowest height can be immersed in the sea water to meet the water intake requirements of different working water depths.

[0052] At the same time, there are at least two water inlet branches 11 with relatively higher and relatively lower heights on the main water inlet pipe 10. Therefore, when one of the water inlet branches 11 cannot be used, water can be taken through the other water inlet branch 11, so as to ensure that the pile flushing system can smoothly take water. For example, when the platform is operating in deep water, due to the deeper insertion of the leg 200, the water inlet branch 11 at the lower position on the main water inlet pipe 10 is buried by the seabed sediment and cannot take water, the pile flushing system can take water through the water inlet branch 11 at the higher position. Or, when the platform is operating in shallow water and the water inlet branch 11 at the higher position cannot take water, the pile flushing system can take water through the water inlet branch 11 at the lower position. Thus, multiple water inlet branches 11 with different heights can complement each other to meet the water intake requirements of different working water depths.

[0053] See Figure 2 , in one embodiment, three water inlet branches 11 are arranged on the main water inlet pipe 10 at intervals along the height direction of the leg 200. The three water inlet branches 11 are a high-position water inlet branch 111, a middle-position water inlet branch 112 and a low-position water inlet branch 113 with gradually decreasing heights in sequence.

[0054] Among them, the high-position water inlet branch 111 can be used for pile flushing water intake when the platform needs to pull out the pile after operating at a deep water level. In other words, when the platform is operating at a deep water level, the height of the leg 200 extending into the sea water is relatively high, and the high-position water inlet branch 111, the middle-position water inlet branch 112 and the low-position water inlet branch 113 arranged on the main water inlet pipe 10 can all be immersed in the sea water and can all be used for pile flushing water intake. It can be understood that when the platform needs to take pile flushing water after operating at a deep water level, water can be taken through at least one of the high-position water inlet branch 111, the middle-position water inlet branch 112 and the low-position water inlet branch 113.

[0055] AsFigure 2 As shown, the middle-position water inlet branch 112 can be used for flushing the pile and taking water when the platform needs to pull out the pile after operating at the middle water level. For example, when the platform is operating at the middle water level, both the middle-position water inlet branch 112 and the low-position water inlet branch 113 on the water inlet main pipe 10 are submerged in seawater. When the platform needs to flush the pile and take water after the operation is completed, water can be taken through at least one of the middle-position water inlet branch 112 and the low-position water inlet branch 113.

[0056] As Figure 2 shown, the low-position water inlet branch 113 can be used for flushing the pile and taking water when the platform needs to pull out the pile after operating in shallow water. For example, when the platform is operating in shallow water, the low-position water inlet branch 113 on the water inlet main pipe 10 is submerged in seawater. When the platform needs to flush the pile and take water after the operation is completed, water can be taken through the low-position water inlet branch 113.

[0057] It can be understood that in other embodiments, two water inlet branches 11 can also be provided on the water inlet main pipe 10 at intervals, or four or more water inlet branches 11, which can be determined according to specific situations.

[0058] As Figure 1 shown, water inlet valves 12 are respectively provided on each water inlet branch 11. Thus, when the platform needs to flush the pile and take water after the operation is completed, the operator can open the water inlet valves 12 on the corresponding water inlet branches 11 as needed to ensure the normal operation of the pile flushing system. After the pile flushing is completed, the operator can close the water inlet valves 12 to prevent seawater from entering. Among them, the water inlet valves 12 can be manual switch valves, for example, ball valves, gate valves, butterfly valves or globe valves, etc. Of course, the water inlet valves 12 can also be remote control valves, which can be determined according to specific situations.

[0059] As Figure 1 shown, in one embodiment, water inlet grilles 13 are respectively provided at the water inlets of each water inlet branch 11. By setting the water inlet grilles 13, large debris in seawater can be initially blocked, playing a role of initial filtration. For example, the water inlet grilles 13 can prevent marine organisms from entering the pipeline or block garbage and debris in seawater from entering the pipeline, thereby ensuring the smoothness of the water inlet branch 11 and the water inlet main pipe 10 and ensuring the stable operation of the pile flushing system.

[0060] Refer to Figure 1 shown, in the embodiment of the present invention, the pile flushing pump 20 is fixedly installed on the pile leg 200. Among them, the pile flushing pump 20 can adopt a seawater submersible pump, and the seawater submersible pump is suitable for use in a seawater environment. Therefore, by adopting the seawater submersible pump, when the pile leg 200 extends into the seawater and stands stably, the seawater submersible pump is submerged in the seawater and can stably pump seawater.

[0061] As Figure 1As shown, the water inlet end of the pile flushing pump 20 is connected to the main water inlet pipe 10. The pile flushing pump 20 is used to suck seawater through each water inlet branch 11. When the pile flushing pump 20 is started, seawater can enter the main water inlet pipe 10 through at least one water inlet branch 11, then enter the pile flushing pump 20, and then the pile flushing pump 20 pressurizes and pumps the seawater into the main pile flushing pipe 30.

[0062] See Figure 1 , in one embodiment, the pile flushing system further includes a filter 60 provided between the main water inlet pipe 10 and the pile flushing pump 20. Exemplarily, the filter 60 may include a filter cartridge, and high-quality quartz sand particles or filter elements may be filled inside the filter cartridge to effectively intercept particulate matter and minute impurities in seawater. By providing the filter 60, impurities in the seawater entering the pile flushing pump 20 can be filtered out, ensuring the reliable operation of the pile flushing pump 20, which is conducive to the stable operation of the pile flushing system.

[0063] See Figure 1 As shown, in the embodiment of the present invention, the main pile flushing pipe 30 is arranged on the pile leg 200. Exemplarily, the main pile flushing pipe 30 can be fixedly installed vertically on the pile leg 200, so as to facilitate the seawater to flow downward under the action of gravity into the pile shoe 300 at the bottom of the pile leg 200, and further enable the pile flushing pump 20 to adopt a pump with a smaller power. Of course, in other embodiments, the main pile flushing pipe 30 can also be arranged obliquely relative to the vertical direction on the pile leg 200, which can be determined according to specific circumstances.

[0064] As Figure 1 shown, the upper end of the main pile flushing pipe 30 is connected to the water outlet end of the pile flushing pump 20, and the lower end of the main pile flushing pipe 30 is communicated with the inlet of the pile flushing pipeline 301 in the pile shoe 300. Thus, after the pile flushing pump 20 pressurizes and pumps the seawater into the main pile flushing pipe 30, the seawater in the main pile flushing pipe 30 can flow downward into the pile flushing pipeline 301 in the pile shoe 300 and then be ejected through each pile flushing nozzle 302.

[0065] As Figure 1 shown, in one embodiment, a check valve 31 is provided on the main pile flushing pipe 30. Exemplarily, the check valve 31 can be arranged at a position on the main pile flushing pipe 30 close to the water outlet end of the pile flushing pump 20. By providing the check valve 31, the seawater in the main pile flushing pipe 30 can be effectively prevented from flowing back, effectively ensuring the normal operation of the pile flushing pump 20.

[0066] As Figure 1 shown, in one embodiment, a stop valve 32 is provided on the main pile flushing pipe 30. Among them, the stop valve 32 can be a manual stop valve. Of course, the stop valve 32 can also adopt an electric or pneumatic stop valve.

[0067] In the present invention, the stop valve 32 can be set to the normally open state. Therefore, when the pile driving system drives a pile, only the corresponding water inlet valve 12 and the pile driving pump 20 need to be opened to achieve pile driving. However, in case of an emergency where it is necessary to cut off the conduction of the main pile driving pipe 30, the main pile driving pipe 30 can be shut off by closing the stop valve 32, which is beneficial to improving the safety of the system.

[0068] See Figure 1 As shown, in an embodiment of the present invention, the control cable 40 is used to connect the pile driving pump 20 and the control device 400. Among them, the control device 400 includes, but is not limited to, a power supply unit and a control unit. The power supply unit can supply power to the pile driving pump 20, and the control unit is used to control the start or stop of the pile driving pump 20 and receive the feedback signal of the pile driving pump 20, etc. The control cable 40 is used to realize the transmission of electrical signals, control signals and feedback signals between the control device 400 and the pile driving pump 20.

[0069] As Figure 2 shown, in some embodiments, a first detection sensor 21 and a second detection sensor 22 are respectively provided at the water inlet end and the water outlet end of the pile driving pump 20. The first detection sensor 21 is used to detect the inlet pressure and / or flow rate of the pile driving pump 20, and the second detection sensor 22 is used to detect the outlet pressure and / or flow rate of the pile driving pump 20.

[0070] Specifically, the first detection sensor 21 can be a pressure sensor, which is used to detect the inlet pressure of the pile driving pump 20. Or, the first detection sensor 21 can be a flow sensor, which is used to detect the inlet flow rate of the pile driving pump 20. Or, the first detection sensor 21 can include a pressure sensor and a flow sensor, which are used to detect the inlet pressure and flow rate of the pile driving pump 20.

[0071] The second detection sensor 22 can be a pressure sensor, which is used to detect the outlet pressure of the pile driving pump 20. Or, the second detection sensor 22 can be a flow sensor, which is used to detect the outlet flow rate of the pile driving pump 20. Or, the second detection sensor 22 can include a pressure sensor and a flow sensor, which are used to detect the outlet pressure and flow rate of the pile driving pump 20.

[0072] Among them, the first detection sensor 21 and the second detection sensor 22 can be electrically connected to the control device 400 through the control cable 40 respectively. Thus, the control device 400 can receive the detection signals of the first detection sensor 21 and the second detection sensor 22, and can control the operation of the pile driving pump 20 according to the detection signals.

[0073] In this embodiment, by providing the first detection sensor 21 and the second detection sensor 22, the control device 400 can achieve real-time monitoring of the water inlet and outlet conditions of the impact pile pump 20. That is, the control device 400 can perform real-time monitoring of the operating state of the impact pile pump 20, thereby ensuring the stable operation of the impact pile system. Moreover, when the impact pile pump 20 fails, it can be detected in time to avoid further damage to the impact pile pump 20.

[0074] As Figure 2 shown, in some embodiments, a third detection sensor 61 is provided on the water inlet side pipeline of the filter 60. The third detection sensor 61 is used to detect the water inlet pressure and / or flow rate of the filter 60. Specifically, the third detection sensor 61 can be a pressure sensor, which is used to detect the water inlet pressure of the filter 60. Alternatively, the third detection sensor 61 can be a flow sensor, which is used to detect the water inlet flow rate of the filter 60. Or, the third detection sensor 61 can include a pressure sensor and a flow sensor, which are used to detect the water inlet pressure and flow rate of the filter 60.

[0075] Among them, the third detection sensor 61 can be electrically connected to the control device 400 through the control cable 40. Thus, the control device 400 can receive the detection signal of the third detection sensor 61 and can control the operation of the impact pile pump 20 according to this detection signal.

[0076] In this embodiment, by providing the third detection sensor 61, the control device 400 can achieve real-time monitoring of the water inlet condition on the water inlet side of the filter 60. Thus, the control device 400 can timely detect whether there are water inlet problems in the water inlet main pipe 10 and each water inlet branch 11, and then the control device 400 can control the impact pile pump 20 to start or stop to ensure the stable operation of the impact pile system.

[0077] See Figure 1 shown, the control cable 40 has a first end and a second end. The first end of the control cable 40 is used to connect to the impact pile pump 20, and the second end is used to connect to the control device 400. Among them, the cable part of the control cable 40 near the first end can be fixedly installed on the pile leg 200 to facilitate the reliable connection between the first end of the control cable 40 and the impact pile pump 20.

[0078] Exemplarily, as Figure 1 shown, a guide disc 201 is provided on the pile leg 200. The first end of the control cable 40 bypasses the guide disc 201 and is connected to the impact pile pump 20. The part of the control cable 40 between the impact pile pump 20 and the guide disc 201 is fixedly installed on the pile leg 200.

[0079] In this embodiment, the guiding disk 201 is the connection point of the cable part of the control cable 40 inside the leg 200 and the cable part outside the leg 200. The guiding disk 201 can not only support the control cable 40, but also play a guiding role.

[0080] As Figure 1 shown, the guiding disk 201 may include a bracket and a guiding wheel. The bracket may be fixedly arranged at the top of the leg 200, and the guiding wheel is arranged on the bracket. The control cable 40 is wound around the outer periphery of the guiding wheel, and the cable parts of the control cable 40 on both sides of the guiding wheel may be respectively connected to the flushing pump 20 and the control device 400.

[0081] As Figure 1 shown, the cable part of the control cable 40 between the flushing pump 20 and the guiding disk 201 may be fixedly installed inside the leg 200 and equipped with a cable protection pipe for physical protection. The cable protection pipe can effectively protect the control cable 40 and prevent its physical damage.

[0082] In this embodiment, the control cable 40 may be a waterproof cable with an IP rating of IPX-8, which can meet the requirement of not being damaged after being immersed in seawater for a long time.

[0083] As Figure 1 shown, the cable part of the control cable 40 between the guiding disk 201 and the control device 400 may be retracted and released through the winch assembly 50. Among them, the winch assembly 50 is arranged on the platform main body 100. Specifically, the winch assembly 50 may be arranged on the fixed armor plate of the platform main body 100.

[0084] Refer to Figure 1 , in one embodiment, the winch assembly 50 includes a winch 51, and the winch 51 is rotatably arranged on the platform main body 100. Specifically, the winch 51 is rotatably arranged on the fixed armor plate. The winch 51 may be an electric winch 51, which can rotate forward or backward under the drive of a motor.

[0085] As Figure 1 shown, the second end of the control cable 40 is retractably wound on the winch 51 and connected to the control device 400. Among them, the control device 400 may be arranged in a cabin below the fixed armor plate and above the main deck. The cable part of the control cable 40 near the second end is wound on the winch 51, and its end extends downward and passes through the fixed armor plate to be connected to the control device 400.

[0086] In this embodiment, when the leg 200 is lifted or lowered relative to the platform main body 100, the winch 51 can rotate accordingly to wind the control cable 40 onto the winch 51 or release it from the winch 51. Thereby, the control cable 40 can be adaptively wound and unwound when the leg 200 is lifted or lowered relative to the platform main body 100, maintaining its own tension state, and avoiding the control cable 40 from being long and knotted or being pulled and damaged.

[0087] See Figure 1 As shown, in an embodiment of the present invention, the impact piling system further includes an emergency impact piling pipeline 70 provided on the leg 200. The emergency impact piling pipeline 70 is used to connect the platform fire water pipeline 101 and the impact piling nozzle 302.

[0088] As described above, when the control device 400 receives the detection signals of the first detection sensor 21 and the second detection sensor 22, indicating that the impact piling pump 20 cannot operate normally, or when the control device 400 receives the detection signal of the third detection sensor 61, indicating that seawater cannot enter the filter 60 normally, the control device 400 can stop the operation of the impact piling pump 20, then the impact piling system cannot take water for impact piling through the water inlet main pipe 10, the impact piling pump 20, and the impact piling main pipe 30. At this time, the impact piling system can connect the platform fire water through the emergency impact piling pipeline 70 for impact piling operation.

[0089] As Figure 1 shown, the emergency impact piling pipeline 70 can be fixedly installed vertically on the leg 200. Of course, in other embodiments, the emergency impact piling pipeline 70 can also be arranged obliquely relative to the vertical direction on the leg 200, which can be determined according to the specific situation.

[0090] See Figure 1 and Figure 2 , a connection branch 71 is provided on the emergency impact piling pipeline 70. The connection branch 71 is used for detachable connection with the platform fire water pipeline 101. Specifically, a connection joint 711 is provided at the port of the connection branch 71 away from the emergency impact piling pipeline 70, and a connection joint can also be provided at the water outlet port of the platform fire water pipeline 101. When it is necessary to use the platform fire water for impact piling, the operator can use the connection hose 74 to connect the connection joint 711 of the connection branch 71 and the connection joint of the platform fire water pipeline 101 respectively, so as to realize the supply of the platform fire water to the impact piling nozzle 302 in the pile shoe 300 through the emergency impact piling pipeline 70 for impact piling.

[0091] See Figure 1, in one embodiment, there are multiple groups of connecting branches 71 provided, and the multiple groups of connecting branches 71 are arranged at intervals along the length extension direction of the emergency pile driving pipeline 70. When the platform operates in different water depth areas, the relative positions of the leg 200 and the main deck of the platform body 100 are also different. When it is necessary to use the platform fire water for pile driving, the operator can connect the group of connecting branches 71 closest to the main deck on the emergency pile driving pipeline 70 to the fire water pipeline 101 of the platform, making the operation more convenient.

[0092] Among them, each group of connecting branches 71 may include one or more than two connecting branches 71. As Figure 1 shown in the example, there are 6 groups of connecting branches 71 arranged at intervals on the emergency pile driving pipeline 70, and each group includes 2 connecting branches 71. Each connecting branch 71 is provided with a connection joint 711 and can be respectively connected to the fire water pipeline 101 of the platform. Of course, in other embodiments, the connecting branches 71 on the emergency pile driving pipeline 70 may also have other arrangement methods.

[0093] See Figure 1 , a control valve 72 is provided on the connecting branch 71. When it is necessary to use the platform fire water for pile driving, the operator can open the control valve 72, so as to realize the supply of the platform fire water to the pile driving nozzle 302 in the pile shoe 300 through the emergency pile driving pipeline 70 for pile driving. After the pile driving is completed, the operator can close the control valve 72. Among them, the control valve 72 can be a manual switch valve, for example, a ball valve, a gate valve, a butterfly valve or a globe valve, etc. Of course, the control valve 72 can also be a remote control valve, which can be determined according to the specific situation.

[0094] See Figure 1 , in one embodiment, a check valve 73 is provided on the emergency pile driving pipeline 70. By setting the check valve 73, the backflow of water in the emergency pile driving pipeline 70 can be effectively prevented.

[0095] It should be noted that in the pile driving system of the present invention, each pipeline, including the water inlet main pipe 10, the water inlet branch 11, the pile driving main pipe 30, the emergency pile driving pipeline 70 and the connecting branch 71, can be made of anti-corrosion pipe materials such as stainless steel pipes or steel pipes treated with anti-corrosion. Among them, the water inlet main pipe 10, the pile driving main pipe 30 and the emergency pile driving pipeline 70 can be fixedly installed on the leg 200 by using pipe clamps or hose clamps, etc. Each water inlet branch 11 can be welded and fixed on the side wall of the water inlet main pipe 10. Each connecting branch 71 can be welded and fixed on the side wall of the emergency pile driving pipeline 70.

[0096] When the pile driving system of the present invention performs pile driving operations:

[0097] First, the platform main body 100 can be lowered to the sea surface through the lifting system, and then pile ramming is carried out. To prevent the pile shoe 300 from shifting during pile ramming, the leg 200 is stopped from being lifted during pile ramming.

[0098] During pile ramming, assuming that the platform operation sea area is a deep sea area, the operator can manually open the inlet valve 12 on the high-level inlet branch 111 of the inlet main pipe 10 and close the inlet valves 12 on the middle-level inlet branch 112 and the low-level inlet branch 113. The control device 400 supplies power to the pile ramming pump 20 through the control cable 40 and controls the pile ramming pump 20 to start. After the pile ramming pump 20 starts, seawater will be sucked into the pile ramming pump 20 through the high-level inlet branch 111 and the filter 60, and after being pressurized by the pile ramming pump 20, it will be injected into the pile ramming pipeline 301 inside the pile shoe 300 through the pile ramming main pipe 30. Finally, the seawater is ejected through each pile ramming nozzle 302, so as to destroy the vacuum adsorption force at the bottom of the pile shoe 300, enabling the leg 200 to be smoothly pulled out.

[0099] It can be understood that to ensure the synchronous pulling out of the 4 legs 200 of the platform, when the pile ramming of each leg 200 reaches a certain degree, the lifting system can be used to try to drive each leg 200 to lift and lower. If all 4 legs 200 can be smoothly pulled out, then continue to drive each leg 200 to lift until all legs 200 are smoothly pulled out. If any one of the legs 200 is difficult to pull out, then continuous pile ramming can be carried out on this leg 200 and the lifting of the other legs 200 is stopped until all legs 200 can be smoothly pulled out.

[0100] In addition, when the pile ramming pump 20 of the pile ramming system cannot be used, or seawater cannot enter normally, the pile ramming system can stop pile ramming through the inlet main pipe 10, the pile ramming pump 20 and the pile ramming main pipe 30, and switch to using the emergency pile ramming pipeline 70 for pile ramming. At this time, only need to connect the connection joint 711 of the connection branch 71 and the connection joint of the platform fire water pipeline 101 through the connection hose 74, and open the control valve 72 on the connection branch 71 and the valve of the platform fire water pipeline 101, then the purpose of using the internal fire water of the ship to carry out pile ramming on the pile shoe 300 can be achieved.

[0101] For the pile driving system of the offshore platform according to the embodiment of the present invention, during the pile driving operation, only the water inlet valve on the corresponding water inlet branch needs to be opened, and the pile driving pump is started. Thus, the pile driving pump can suck seawater and pump the seawater to the pile driving main pipe and the pile driving nozzle in the pile shoe, realizing the destruction of the soil adsorption force and the vacuum layer at the bottom of the pile shoe, so that the pile leg can be smoothly pulled out. Compared with the traditional pile pulling operation that requires manual connection of the pile driving hose by personnel, the operation of the pile driving system of the offshore platform according to the embodiment of the present invention is simpler, the pile driving efficiency is higher, and it is not affected by sea conditions, so that the platform pile pulling cycle can be greatly shortened, the allocation of pile pulling operation personnel can be reduced, and the labor and time costs can be reduced. Therefore, the pile driving system of the present invention can effectively solve the problem that a large number of crew members are required for the traditional pile pulling operation, greatly improve the efficiency of the platform pile pulling operation, and improve the economic efficiency of the platform operation.

[0102] For the pile driving system of the offshore platform according to the embodiment of the present invention, the pile driving pump is connected to the control device through a control cable, and the control device can centrally control the pile driving operations of multiple pile legs of the platform to ensure that the four pile legs can perform pile driving and pile pulling synchronously. Thus, not only can the operation efficiency of pile driving and pile pulling be improved, but also it is beneficial to ensure the synchronous pile pulling of the four pile legs and avoid disasters and risks such as the platform losing its center of gravity caused by asynchronous pile pulling.

[0103] For the pile driving system of the offshore platform according to the embodiment of the present invention, since it directly takes seawater by using the pile driving pump and the water inlet branch, the continuous supply of pile driving water can be ensured. In addition, the pile driving system is also equipped with an emergency pile driving pipeline, and the emergency pile driving pipeline can connect the platform fire water for pile driving operations, so that pile driving operations can be carried out even in emergency situations, improving the practicability of the pile driving system.

[0104] For the pile driving system of the offshore platform according to the embodiment of the present invention, the pile driving pump, the water inlet main pipe, and the pile driving main pipe are all fixedly arranged on the pile leg, and the pile driving pump, the water inlet main pipe, and the pile driving main pipe can be lifted or lowered together with the pile leg. Thus, the pile driving operation steps can be simplified, and no matter what the sea conditions are, it will not affect the water intake and pile driving operations of the pile driving pump, the water inlet main pipe, and the pile driving main pipe. Therefore, the smooth progress of the pile driving operation can be ensured, and it is beneficial to shorten the platform pile pulling cycle.

[0105] For the pile driving system of the offshore platform according to the embodiment of the present invention, a plurality of water inlet branches with different water level heights are provided on the water inlet main pipe, so that the pile driving system can adapt to the direct intake of seawater in various medium-depth and shallow waters, thus greatly reducing the limitation of the pile driving operation area and ensuring that the pile driving operation can be smoothly carried out in different-depth waters.

[0106] The above embodiments are only illustrative examples of the structure. The structures in each embodiment are not fixedly combined structures. Without structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0107] While the invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary rather than restrictive. Since the invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but rather should be construed broadly within the spirit and scope defined by the appended claims, and accordingly all variations and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A pile driving system for an offshore platform, the offshore platform comprising a platform body, pile legs and pile shoes, the pile shoes being provided with a pile driving nozzle, characterized in that: include: A water inlet main pipe, which is arranged on the pile legs and extends along the height direction of the pile legs. The water inlet main pipe is provided with at least two water inlet branches with different water levels, and each of the water inlet branches is provided with a water inlet valve; A pile pump, the pile pump is fixedly mounted on the pile leg, the water inlet end of the pile pump is connected to the water inlet main pipe, and the pile pump is used to suck seawater through each of the water inlet branches; A pile-driving main pipe, which is arranged on the pile leg, one end of which is connected to the water outlet of the pile-driving pump, and the other end of which is connected to the pile-driving nozzle; A control cable, wherein the control cable is at least partially fixedly mounted on the pile leg and electrically connected to the pile pump, and an end of the control cable away from the pile pump is used to be connected to a control device on the platform body; A winch assembly is arranged on the platform body, and the winch assembly is used to retract and release the control cable.

2. The offshore platform pile driving system according to claim 1, characterized in that: A first detection sensor and a second detection sensor are respectively provided at the water inlet and the water outlet of the pile driving pump, and the first detection sensor and the second detection sensor are electrically connected to the control device through the control cable. The first detection sensor is used to detect the water inlet pressure and / or flow of the pile driving pump, and the second detection sensor is used to detect the water outlet pressure and / or flow of the pile driving pump.

3. The offshore platform pile driving system according to claim 1, characterized in that: It also includes a filter, which is arranged between the water inlet main pipe and the pile driving pump and is used to filter the seawater entering the pile driving pump.

4. The offshore platform pile driving system according to claim 3, characterized in that: A third detection sensor is provided on the water inlet side pipeline of the filter. The third detection sensor is electrically connected to the control device through the control cable. The third detection sensor is used to detect the water inlet pressure and / or flow of the filter.

5. The offshore platform pile driving system according to claim 1, characterized in that: The pile driving pump adopts a seawater submersible pump.

6. The offshore platform pile driving system according to claim 1, characterized in that: The water inlet main pipe is provided with three water inlet branches at intervals along the height direction of the pile legs, wherein the three water inlet branches are a high-position water inlet branch, a middle-position water inlet branch and a low-position water inlet branch with successively decreasing heights; and / or A water inlet grille is provided at the water inlet of each of the water inlet branches.

7. The offshore platform pile driving system according to claim 1, characterized in that: The pile driving main pipe is provided with a check valve; and / or A stop valve is arranged on the pile driving main pipe.

8. The offshore platform pile driving system according to claim 1, characterized in that: The control cable has a first end and a second end, a guide plate is provided on the pile leg, the first end of the control cable passes around the guide plate and is connected to the pile pump, and the portion of the control cable between the pile pump and the guide plate is fixedly mounted on the pile leg; The winch assembly comprises a winch, and the winch is rotatably arranged on the platform body. The second end of the control cable is retractably wound on the winch and connected to the control device.

9. The offshore platform pile driving system according to any one of claims 1 to 8, characterized in that: It also includes an emergency pile flushing pipeline, which is arranged on the pile leg and is used to connect the platform fire water pipeline and the pile flushing nozzle; The emergency pile flushing pipeline is provided with a connecting branch, the connecting branch is used to be detachably connected to the platform fire water pipeline, and the connecting branch is provided with a control valve.

10. The offshore platform pile driving system according to claim 9, characterized in that: The emergency pile-punching pipeline is vertically arranged on the pile leg, and a plurality of connecting branches are provided. The plurality of connecting branches are arranged at intervals along the length extension direction of the emergency pile-punching pipeline.

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