An in-pile jet dredging equipment for the sea

Abstract

The present invention provides a jet mud discharging device inside an offshore pile, comprising: a jet system, a flushing water system, a standby system, a mud discharging system, a control system and a structural framework. The jet system, the flushing water system, the standby system and the mud discharging system are arranged in the structural framework, and the control system is electrically connected to the jet system, the flushing water system and the standby system. The present invention mainly utilizes an integrated monitoring system and the function of scouring the inner wall of the pile, and there is a standby pump for replacement, so as to achieve the effect of completing the mud discharging inside the pile and the cleaning of the inner wall of the steel pile through one system and improving the offshore operation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore underwater mud discharging, and particularly to an offshore in-pile jet mud discharging device. Background Art

[0002] Underwater steel pile cutting is a common process in the construction of offshore engineering and offshore wind power projects, and often appears in operation links such as platform demolition, jacket repair, booster station foundation construction, and single pile construction of wind turbines. In underwater steel pile cutting operations, due to construction process requirements, mud discharging operations inside or outside the steel pile to be cut are often accompanied. For platform demolition, the tangent position is 4m below the mud line; for single pile foundation of wind turbines, the requirement for mud discharging is that the mud surface heights inside and outside the pile are the same; for the construction processes of platform jackets and offshore wind farm booster station foundations, it often involves high-strength concrete grouting construction after mud discharging. The requirement for the depth of mud discharging inside the foundation steel pile is according to the design requirements, and it is required to wash the inner wall surface of the steel pile at the mud discharging position so that there is no hanging mud on the inner wall surface.

[0003] Currently, there are two main principles for in-pile mud discharging equipment on the market: air-lift mud discharging equipment and slurry pump suction mud discharging. The air-lift mud discharging equipment requires high-pressure water / reamer and air compressor assistance, and requires many auxiliary equipment, and the matching system is complex; the slurry pump suction cannot carry out mud discharging operations for seabed mud containing gravel, and the currently used pump suction mud discharging equipment on the market is all single-pump operation without an integrated standby pump. If the slurry pump is damaged, the equipment needs to be lifted out of the water for repair, reducing the offshore operation efficiency; the existing jet mud discharging equipment belongs to niche equipment and is very simple, with a small mud discharging capacity. In addition, the above three visible mud discharging equipment cannot clean the inner wall of the steel pile to meet the grouting requirements of the platform foundation steel pile, and there is no underwater monitoring system to master the operation of the equipment.

[0004] Therefore, it is necessary to design an offshore in-pile jet mud discharging device. Summary of the Invention

[0005] In view of the above-mentioned technical problems existing in the existing offshore underwater mud discharging equipment, such as the need for a large number of auxiliary equipment and low working efficiency, an offshore in-pile jet mud discharging device is provided. The present invention mainly utilizes an integrated monitoring system and the function of flushing the inner wall of the pile, and has a standby pump for replacement, so as to achieve the effect of completing the mud discharging inside the pile and cleaning the inner wall of the steel pile through one system and improving the offshore operation efficiency.

[0006] The technical means adopted by the present invention are as follows:

[0007] An in-pile jet dredging equipment for the sea, characterized in that it includes: a jet system, a flushing system, a standby system, a dredging system, a control system and a structural framework. The jet system, the flushing system, the standby system and the dredging system are arranged in the structural framework, and the control system is electrically connected to the jet system, the flushing system and the standby system; the jet system includes a jet pump, a jet connection control pipeline and a U-shaped jet pipe, and the jet pump and the U-shaped jet pipe are connected through the jet connection control pipeline; the flushing system includes a flush pump, a flushing connection control pipeline and a flushing coil, and the flush pump and the flushing coil are connected through the flushing connection control pipeline; the standby system includes a standby pump and a standby pump pipeline; the dredging system includes a conical dredging pipe and a straight section of the dredging pipe, the conical dredging pipe is fixedly connected above the flushing coil, and the straight section of the dredging pipe is arranged at the upper end of the conical dredging pipe.

[0008] Further, the jet connection control pipeline includes a first one-way valve, a first tee and a first flow meter, and the flushing connection control pipeline includes a second one-way valve, a second flow meter and a flushing pipeline.

[0009] Further, the flushing coil includes an inner flushing coil, an outer flushing coil and a flushing coil connecting pipe; the inner flushing coil and the outer flushing coil are connected through the flushing coil connecting pipe, and vertical flushing nozzles for downward flushing are evenly distributed at the bottoms of the inner flushing coil and the outer flushing coil, and lateral flushing nozzles are arranged on the side surface of the outer flushing coil; the top of the inner flushing coil is welded to the bottom of the conical dredging pipe as a whole, and the inner side wall of the inner flushing coil serves as the suction port of the dredging pipe.

[0010] Further, the drainage port of the jet pump is flange-connected to the first one-way valve; the first one-way valve is flange-connected to the first passage of the first tee; the second passage of the first tee is flange-connected to the first flow meter; the first flow meter is flange-connected to the U-shaped jet pipe; the U-shaped jet pipe is embedded and fixed on the conical dredging pipe, the water outlet of the U-shaped jet pipe is located below the straight section of the dredging pipe, and the vertical pipe section of the U-shaped jet pipe embedded inside the conical dredging pipe is coaxial with the straight section of the dredging pipe.

[0011] Further, the drainage port of the flush pump is flange-connected to the second one-way valve; the second one-way valve is flange-connected to the second flow meter; the second flow meter is flange-connected to the flushing pipeline; the flushing pipeline is welded and fixed to the top of the inner flushing coil and is connected to the inner flushing coil.

[0012] Further, the drain outlet of the standby pump is flange-connected to the first passage of the second three-way; the second passage of the second three-way is flange-connected to the second ball valve; the second ball valve is flange-connected to the third flowmeter; the third flowmeter is flange-connected to the standby pump pipeline; the standby pump pipeline is welded and fixed at the top of the inner ring of the flushing coil and is communicated with the inner ring of the flushing coil; the third passage of the second three-way is flange-connected to the first ball valve, and the first ball valve is flange-connected to the third passage of the first three-way; both the first ball valve and the second ball valve are electro-hydraulic remote control ball valves.

[0013] Further, the structural frame includes a frame body, a top platform of the frame body and a middle platform of the frame body. The frame body is composed of six square steel pipes which are evenly distributed and welded at the upper end of the outer ring of the flushing coil at the bottom. The top of the frame body is connected to the top platform of the frame body, and the middle part of the frame body is connected to the middle platform of the frame body; the top platform of the frame body is welded and fixed to the straight section of the sludge discharge pipe; the middle platform of the frame body is welded and fixed to the straight section of the sludge discharge pipe, and three water pumps are fixed on the middle platform of the frame body and water pump inlets are opened at the positions corresponding to the suction ports of the water pumps; sliding shoes are arranged on the outer end faces of the frame body.

[0014] Further, the control system includes water pump cables, a control umbilical cable and an on-water control cabinet. The number of the water pump cables is three, which are respectively connected to the jet pump, the flushing water pump and the standby pump; the control umbilical cable integrates the power supply and control cables of the first ball valve and the second ball valve and the control and signal cables of the first flowmeter, the second flowmeter and the third flowmeter; an inverter, a ball valve controller and a flowmeter display are arranged on the on-water control cabinet; the number of the inverters is four, three are in use and one is in standby; the number of the ball valve controllers is two, which are used for mutual standby when the two ball valves do not act simultaneously; the opening and closing of the inverter and the ball valve controller are both carried out on the on-water control cabinet.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. An in-sea pile jet sludge discharge device provided by the present invention realizes the standby and conversion of using a single water pump as a jet pump and a flushing water pump through two groups of three-ways and ball valves, with a simple structure and convenient control, making it easier to ensure the sludge discharge and flushing functions.

[0017] 2. An in-sea pile jet sludge discharge device provided by the present invention realizes the functions of jet sludge discharge, high-pressure water flushing of sludge and standby with three water pumps. The system is simple, and the on-water control equipment can effectively monitor the underwater operation conditions, with high operation efficiency and can adapt to different waters and seabed geology operations.

[0018] 3. The jet mud discharging equipment inside the offshore pile provided by the present invention uses a lateral water flushing nozzle to clean the inner wall of the steel pile to be mud discharged, ensuring the grouting quality inside the underwater steel pile.

[0019] For the above reasons, the present invention can be widely promoted in the fields of offshore underwater mud discharging technology and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a system diagram of a jet mud discharging equipment inside an offshore pile of the present invention.

[0022] Figure 2 It is for the Figure 1 underwater mud discharging equipment of a jet mud discharging equipment inside an offshore pile of the present invention.

[0023] Figure 3 It is for the Figure 2 front view of a jet mud discharging equipment inside an offshore pile of the present invention.

[0024] Figure 4 It is for the Figure 2 side view of a jet mud discharging equipment inside an offshore pile of the present invention.

[0025] Figure 5 It is for the Figure 2 bottom view of a jet mud discharging equipment inside an offshore pile of the present invention.

[0026] Figure 6 It is for the Figure 2 A - A sectional view of a jet mud discharging equipment inside an offshore pile of the present invention.

[0027] Figure 7 It is for the Figure 2 B - B sectional view of a jet mud discharging equipment inside an offshore pile of the present invention.

[0028] Figure 8 It is a structural sectional view of the jet pipe embedded in the conical mud discharging pipe of a jet mud discharging equipment inside an offshore pile of the present invention.

[0029] Figure 9 It is a schematic diagram of the pipe system of the underwater mud discharging equipment of a jet mud discharging equipment inside an offshore pile of the present invention.

[0030] Figure 10 It is a schematic diagram of the on - water control cabinet of a jet mud discharging equipment inside an offshore pile of the present invention.

[0031] In the figure: 1. Flushing coil pipe; 1.1 Inner ring of the flushing coil pipe; 1.2 Outer ring of the flushing coil pipe; 1.3 Connecting pipe of the flushing coil pipe; 2. Vertical flushing nozzle; 2.1 Horizontal flushing nozzle; 3. Conical sludge discharge pipe; 3.1 Suction opening of the sludge discharge pipe; 3.2 Straight section of the sludge discharge pipe; 3.3 Elbow section of the sludge discharge pipe; 3.4 Sludge discharge outlet; 4. U-shaped jet pipe; 5. Jet pump; 6. Flushing water pump; 6.1 Flushing water pipeline; 7. Standby pump; 7.1 Standby pump pipeline; 8. First check valve; 9. Second check valve; 10. First tee; 11. Second tee; 12. First ball valve; 13. Second ball valve; 14. First flowmeter; 15. Second flowmeter; 16. Third flowmeter; 17. Frame; 17.1 Top platform of the frame; 17.2 Middle platform of the frame; 18. Slide shoe; 19. Water pump cable; 20. Control umbilical cable; 21. Above-water control cabinet; 22. Frequency converter; 23. Ball valve controller; 24. Flowmeter display. Specific implementation mode

[0032] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0034] It should be noted that the terms used herein are only for describing the specific implementation mode and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0035] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present invention: the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0037] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. can be used here to describe the spatial positional relationships between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0038] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as limiting the protection scope of the present invention.

[0039] As Figure 1-10As shown in the figure, the present invention provides a jet dredging equipment inside an offshore pile, including: a jet system, a flushing system, a standby system, a dredging system, a control system and a structural framework. The jet system, the flushing system, the standby system and the dredging system are arranged in the structural framework, and the control system is electrically connected to the jet system, the flushing system and the standby system; the jet system includes a jet pump 5, a jet connection control pipeline and a U-shaped jet pipe 4, and the jet pump 5 and the U-shaped jet pipe 4 are connected through the jet connection control pipeline; the flushing system includes a flush pump 6, a flushing connection control pipeline and a flushing coil 1, and the flush pump 6 and the flushing coil 1 are connected through the flushing connection control pipeline; the standby system includes a standby pump 7 and a standby pump pipeline 7.1; the dredging system includes a conical dredging pipe 3 and a straight section of the dredging pipe 3.2, the conical dredging pipe 3 is fixedly connected above the flushing coil 1, and the straight section of the dredging pipe 3.2 is arranged at the upper end of the conical dredging pipe 3; the jet connection control pipeline includes a first check valve 8, a first tee 10 and a first flowmeter 14, and the flushing connection control pipeline includes a second check valve 9, a second flowmeter 15 and a flushing pipeline 6.1; the flushing coil 1 includes an inner circle 1.1 of the flushing coil, an outer circle 1.2 of the flushing coil and a connecting pipe 1.3 of the flushing coil; the inner circle 1.1 of the flushing coil and the outer circle 1.2 of the flushing coil are connected through the connecting pipe 1.3 of the flushing coil, and vertical flushing nozzles 2 for flushing downward are uniformly distributed at the bottoms of the inner circle 1.1 of the flushing coil and the outer circle 1.2 of the flushing coil, and a lateral flushing nozzle 2.1 is arranged on the side surface of the outer circle 1.2 of the flushing coil; the top of the inner circle 1.1 of the flushing coil is welded integrally with the bottom of the conical dredging pipe 3, and the inner side wall of the inner circle 1.1 of the flushing coil serves as a suction port 3.1 of the dredging pipe; the drain port of the jet pump 5 is flange-connected to the first check valve 8; the first check valve 8 is flange-connected to the first passage of the first tee 10; the second passage of the first tee 10 is flange-connected to the first flowmeter 14; the first flowmeter 14 is flange-connected to the U-shaped jet pipe 4; the U-shaped jet pipe 4 is embedded and fixed on the conical dredging pipe 3, the water outlet of the U-shaped jet pipe 4 is located below the straight section 3.2 of the dredging pipe, and the vertical pipe section of the U-shaped jet pipe 4 embedded inside the conical dredging pipe 3 is coaxial with the straight section 3.2 of the dredging pipe; the drain port of the flush pump 6 is flange-connected to the second check valve 9; the second check valve 9 is flange-connected to the second flowmeter 15; the second flowmeter 15 is flange-connected to the flushing pipeline 6.1; the flushing pipeline 6.1 is welded and fixed on the top of the inner circle 1.1 of the flushing coil and is connected to the inner circle 1.1 of the flushing coil...1. Connected; the drain outlet of the standby pump 7 is flange-connected to the first passage of the second three-way joint 11; the second passage of the second three-way joint 11 is flange-connected to the flange of the second ball valve 13; the second ball valve 13 is flange-connected to the flange of the third flowmeter 16; the third flowmeter 16 is flange-connected to the standby pump pipeline 7.1; the standby pump pipeline 7.1 is welded and fixed at the top of the inner ring 1.1 of the flushing coil and is connected to the inner ring 1.1 of the flushing coil; the third passage of the second three-way joint 11 is flange-connected to the flange of the first ball valve 12, and the first ball valve 12 is flange-connected to the third passage of the first three-way joint 10; both the first ball valve 12 and the second ball valve 13 are electro-hydraulic remotely controlled ball valves; the structural frame includes a frame body 17, a top platform 17.1 of the frame body and a middle platform 17.2 of the frame body. The frame body 17 is composed of six square steel pipes, which are evenly distributed and welded at the upper end of the outer ring 1.2 of the flushing coil at the bottom. The top of the frame body 17 is connected to the top platform 17.1 of the frame body, and the middle part of the frame body 17 is connected to the middle platform 17.2 of the frame body; the top platform 17.1 of the frame body is welded and fixed to the straight section 3.2 of the sludge discharge pipe; the middle platform 17.2 of the frame body is welded and fixed to the straight section 3.2 of the sludge discharge pipe. Three water pumps are fixed on the middle platform 17.2 of the frame body, and water pump inlets are opened at the positions corresponding to the suction ports of the water pumps; sliding shoes 18 are arranged on the outer end faces of the frame body 17; the control system includes a water pump cable 19, a control umbilical cable 20 and an on-water control cabinet 21. The number of the water pump cables 19 is three, which are respectively connected to the jet pump 5, the flushing water pump 6 and the standby pump 7; the control umbilical cable 20 integrates the power supply and control cables of the first ball valve 12 and the second ball valve 13 and the control and signal cables of the first flowmeter 14, the second flowmeter 15 and the third flowmeter 16; an inverter 22, a ball valve controller 23 and a flowmeter display 24 are arranged on the on-water control cabinet 21; the number of the inverters 22 is four, three are in use and one is in standby; the number of the ball valve controllers 23 is two, which are used for mutual standby when the two ball valves do not act simultaneously; the opening and closing of the inverter 22 and the ball valve controller 23 are both carried out on the on-water control cabinet 21..

[0040] Embodiment 1

[0041] As Figure 1-10 shown, the present invention provides a jet sludge discharge device in an offshore pile, as Figure 1-8As shown in the figure: It includes a flushing coil pipe 1 with a rectangular cross-section. The flushing coil pipe 1 is composed of an inner flushing coil 1.1 with vertical flushing nozzles 2 installed at the bottom and an outer flushing coil 1.2. The inner flushing coil 1.1 and the outer flushing coil 1.2 are connected by a flushing coil connecting pipe 1.3. In addition, the outer flushing coil 1.2 is equipped with transverse flushing nozzles 2.1. The top of the inner flushing coil 1.1 is connected and welded with a conical sludge discharge pipe 3, a flushing water pipeline 6.1, and a standby pipeline 7.1. Among them, the bottom of the conical sludge discharge pipe 3 is welded integrally with the inner wall of the inner flushing coil 1.1, and the inner flushing coil 1.1 also serves as the sludge discharge pipe suction port 3.1 of the conical sludge discharge pipe 3. The flushing water pipeline 6.1 is welded and fixed on the top of the inner flushing coil 1.1 with a rectangular cross-section, beside the conical sludge discharge pipe 3, and the flushing water pipeline 6.1 is connected to the inner flushing coil 1.1; the top of the flushing water pipeline 6.1 is flange-connected to the second flowmeter 15, the second flowmeter 15 is flange-connected to the second one-way valve 9, and the second one-way valve 9 is flange-connected to the drainage port of the flushing pump 6. The standby pump pipeline 7.1 is welded and fixed on the top of the inner flushing coil 1.1 with a rectangular cross-section, beside the conical sludge discharge pipe 3, and the standby pump pipeline 7.1 is connected to the inner flushing coil 1.1; the top of the standby pump pipeline 7.1 is flange-connected to the third flowmeter 16, the third flowmeter 16 is flange-connected to the second ball valve 13, and the second ball valve 13 is flange-connected to the second passage of the second three-way joint 11. The first passage of the second three-way joint 11 is flange-connected to the drainage port of the standby pump 7. The U-shaped jet pipe 4 penetrates and is fixed on the conical sludge discharge pipe 3. The water outlet of the U-shaped jet pipe 4 is located below the straight section 3.2 of the sludge discharge pipe, and the vertical pipe section of the U-shaped jet pipe 4 embedded inside the conical sludge discharge pipe 3 is coaxial with the straight section 3.2 of the sludge discharge pipe; the water inlet of the U-shaped jet pipe 4 is flange-connected to the first flowmeter 14, the first flowmeter 14 is flange-connected to the second passage of the first three-way joint 10, the first passage of the first three-way joint 10 is flange-connected to the first one-way valve 8, and the first one-way valve 8 is flange-connected to the drainage port of the jet pump 5.

[0042] The two flanges of the first ball valve 12 are respectively connected to the third passage of the first three-way joint 10 and the third passage of the second three-way joint 11, connecting the standby pipeline and the jet pipeline.

[0043] As Figure 9 shown in the pipeline diagram, when starting the jet pump 5, it is necessary to ensure that the jet pipeline is unobstructed: jet pump 5 → first one-way valve 8 → first three-way joint 10 (first passage) → first flowmeter 14 → U-shaped jet pipe 4. At this time, the first ball valve 12 is in the closed state, and the high-speed water flow rushes out from the outlet of the U-shaped jet pipe 4 and enters the straight section 3.2 of the sludge discharge pipe, forming a jet flow field. The first flowmeter 14 remotely displays the flow rate of this pipeline to determine whether the jet pump 5 is working and whether this pipeline is a closed passage.

[0044] As Figure 9As shown in the pipeline diagram, when starting the flushing water pump 6, it is necessary to ensure the smoothness of the flushing pipeline: flushing water pump 6 → second check valve 9 → second flowmeter 15 → flushing coil 1. At this time, the second ball valve 13 is in the closed state, and high-speed and large-flow water enters the flushing coil and sprays out from the vertical flushing nozzle 2 and the horizontal flushing nozzle 2.1, forming high-pressure water spraying. The second flowmeter 15 displays the pipeline flow rate on the flowmeter display 24 through data transmission to determine whether the flushing water pump 6 is working and whether the pipeline is a closed passage.

[0045] As Figure 9 As shown in the pipeline diagram, when the jet pump 5 fails to work due to factors such as malfunctions, the standby pipeline is enabled: standby pump 7 → the first passage of the second three-way valve 11 → the third passage of the second three-way valve → first ball valve 12 → the third passage of the first three-way valve 10 → the second passage of the first three-way valve 10 → first flowmeter 14 → U-shaped jet pipe 4. At this time, the second ball valve 13 is in the closed state and the first check valve 8 stops water to prevent water from discharging from the jet pump 5, ensuring that high-speed water rushes out from the outlet of the U-shaped jet pipe 4 and enters the straight section 3.2 of the mud discharge steel pipe, forming a jet flow field. The first flowmeter 14 displays the pipeline flow rate on the flowmeter display 24 through data transmission to determine whether the standby pump 7 is working and whether the pipeline is a closed passage.

[0046] As Figure 9 As shown in the pipeline diagram, when the flushing water pump 6 fails to work due to factors such as malfunctions, the standby pipeline is enabled: standby pump 7 → the first passage of the second three-way valve 11 → the second passage of the second three-way valve → second ball valve 13 → third flowmeter 16 → flushing coil 1. At this time, the first ball valve 12 is in the closed state and the second check valve 9 stops water to prevent water from discharging from the flushing water pump 6, and high-speed and large-flow water sprays out from the vertical flushing nozzle 2 and the horizontal flushing nozzle 2.1, forming high-pressure water spraying. The third flowmeter 16 displays the pipeline flow rate on the flowmeter display 24 through data transmission to determine whether the standby pump 7 is working and whether the pipeline is a closed passage.

[0047] As Figure 9 As shown in the pipeline diagram, high-speed and large-flow water enters the flushing coil and sprays out from the vertical flushing nozzle 2 and the horizontal flushing nozzle 2.1, forming high-pressure water spraying to disperse the bottom mud in the offshore pile, forming a mud-water mixture.

[0048] As Figure 9In the shown pipeline diagram, when high-speed water flow rushes out from the outlet of the U-shaped jet pipe 4 and enters the straight section 3.2 of the sludge discharge pipe, forming a jet flow field, due to the high-speed and large-flow water flushing into the straight section 3.2 of the sludge discharge pipe and finally discharging from the elbow section 3.3 of the sludge discharge pipe, a negative pressure will be formed at the sludge discharge pipe suction port 3.1 at the bottom of the conical sludge discharge pipe 3. Under the action of the negative pressure, the mud dispersed by the vertical flushing nozzle 2 and the horizontal flushing nozzle 2.1 together with seawater form a mud-water mixture and enter the sludge discharge pipe, and finally discharge from the sludge discharge outlet 3.4 through the elbow section 3.3 of the sludge discharge pipe.

[0049] Both the first ball valve 12 and the second ball valve 13 are equipped with electro-hydraulic controllers, and the opening and closing of the first ball valve 12 and the second ball valve 13 can be remotely controlled.

[0050] The electro-hydraulic controller is connected to the on-water control cabinet 21 through the umbilical cable 20, and the umbilical cable 20 also integrates the power supply and signal transmission lines of the first flowmeter 14, the second flowmeter 15, and the third flowmeter 16. The jet pump 5, the flushing pump 6, and the standby pump 7 are respectively connected to the frequency converter 22 of the on-water control cabinet 21 through three cables.

[0051] The on-water control cabinet 21 integrates a frequency converter 22, a ball valve controller 23, and a flowmeter display 24. There are a total of 4 frequency converters 22, three for use and one for standby. While controlling the operation of the water pump, the working condition of the water pump can be determined through the water pump load displayed by the frequency converter; there are two ball valve controllers 23, which respectively control the opening and closing of the first ball valve 12 and the second ball valve 13; the flowmeter display 24 is a single display screen, which respectively displays the flow data of the first flowmeter 14, the second flowmeter 15, and the third flowmeter 16.

[0052] The frame 17 is formed by welding six square steel pipes at the top of the outer ring 1.2 of the flushing coil. The top of the frame 17 is connected to the top platform 17.1 of the frame, and the middle part of the frame 17 is connected to the middle platform 17.2 of the frame; three water pumps are fixed on the middle platform 17.2 of the frame, and water pump inlets are opened at positions corresponding to the water pump suction ports. The six square steel pipes of the frame 17 are evenly arranged.

[0053] The frame, butt flange, tee, pipeline, flowmeter, ball valve, and check valve are all made of steel structure.

[0054] The jet pump 5, the flushing pump 6, and the standby pump 7 are water pumps of the same model. In order to distinguish their functions, they have different names, and they are all large-flow and high-lift water pumps to increase the jet flow rate and flushing pressure.

[0055] When performing the operation of discharging sludge inside the underwater pile pipe at sea, it is necessary to use a marine crane to assist in placing the underwater sludge discharge equipment into the underwater pile pipe, and the frame 17 is the load-bearing structure for hoisting.

[0056] Embodiment 2

[0057] As shown Figure 1-10 in the figure, the present invention provides a jet dredging equipment in an offshore pile. During on-site operation, the underwater dredging equipment shown Figure 2 is assisted by divers and placed into the dredging pile pipe. The outer diameter of the dredging equipment can be designed according to the inner diameter of the dredging pile pipe, with a margin of 100 mm to 200 mm reserved to ensure that the equipment can be conveniently placed into the steel pile. After the dredging equipment is placed in the pile pipe, the sliding shoes 18 will support on the inner wall of the steel pile to prevent the equipment from getting stuck in the steel pile or being damaged by collision. After the dredging equipment falls onto the mud surface in the steel pile, start the frequency converter connected to the flush water pump 6 from the onshore control cabinet 21. The data of the second flowmeter 15 corresponding to the flowmeter display 24 screen will show the flow rate of the flush water pump 6. High-speed and large-flow water jets out from the vertical flush nozzles 2 and the horizontal flush nozzles 2.1 to form high-pressure water jets to scour the mud in the pile, dispersing the mud to form a mud-water mixture. After about 5 to 10 minutes, start the frequency converter connected to the jet pump 5. The data of the first flowmeter 14 corresponding to the flowmeter display 24 screen will show the flow rate of the jet pump 5. High-speed and large-flow water jets out from the outlet of the U-shaped jet pipe 4 and enters the straight section 3.2 of the dredging pipe. When the high-speed water jets out from the outlet of the U-shaped jet pipe 4 and enters the straight section 3.2 of the dredging pipe to form a jet flow field, due to the high-speed and large-flow water flushing into the straight section 3.2 of the dredging pipe and finally discharging from the bent section 3.3 of the dredging steel pipe, a negative pressure will be formed at the suction port 3.1 of the dredging pipe at the bottom of the conical dredging pipe 3. Under the action of the negative pressure, the mud dispersed by the vertical flush nozzles 2 and the horizontal flush nozzles 2.1 together with seawater forms a mud-water mixture and enters the dredging pipe, and finally discharges from the dredging outlet 3.4.

[0058] When the frequency converter shows that the water pump has no load but the corresponding flowmeter has flow data, it indicates that the water pump is still working. Similarly, when the frequency converter shows that the water pump has a load but the corresponding flowmeter has no data feedback, it also indicates that the water pump is still working. The two can be mutually checked and monitored.

[0059] During the dredging process, when one of the jet pump 5 or the flush water pump 6 fails, that is, when there is no data feedback from the frequency converter or the flowmeter corresponding to the water pump, it can be determined that the water pump is not working. At this time, the standby pump 7 needs to be started, and at the same time, the on / off of the first ball valve 12 and the second ball valve 13 are adjusted from the ball valve controller 23 on the onshore control cabinet 21 to replace the jet or flush water pipeline. It should be noted that when the flush water pump 6 fails, the third flowmeter 16 monitors the flow rate of the standby pump 7 performing the function of the flush water pump and mutually checks and monitors with the frequency converter corresponding to the standby pump 7; when the jet pump 5 fails, it is still the first flowmeter 14 that monitors the flow rate of the standby pump 7 performing the function of the jet pump and mutually checks and monitors with the frequency converter corresponding to the standby pump 7.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An in-pile jet dredging equipment for the sea, characterized in that Comprising: A jet system, a flushing system, a standby system, a sludge discharging system, a control system and a structural framework. The jet system, the flushing system, the standby system and the sludge discharging system are arranged in the structural framework, and the control system is electrically connected to the jet system, the flushing system and the standby system; The jet system includes a jet pump, a jet connection control pipeline and a U-shaped jet pipe, and the jet pump and the U-shaped jet pipe are connected through the jet connection control pipeline; The flushing system includes a flush pump, a flushing connection control pipeline and a flushing coil, and the flush pump and the flushing coil are connected through the flushing connection control pipeline; The standby system includes a standby pump and a standby pump pipeline; The sludge discharging system includes a conical sludge discharging pipe and a straight section of the sludge discharging pipe. The conical sludge discharging pipe is fixedly connected above the flushing coil, and the straight section of the sludge discharging pipe is arranged at the upper end of the conical sludge discharging pipe; The jet connection control pipeline includes a first one-way valve, a first tee and a first flowmeter, and the flushing connection control pipeline includes a second one-way valve, a second flowmeter and a flushing pipeline; The flushing coil includes an inner flushing coil, an outer flushing coil and a flushing coil connecting pipe; The inner flushing coil and the outer flushing coil are connected through the flushing coil connecting pipe. Vertically downward flushing nozzles for flushing are evenly distributed at the bottom of the inner flushing coil and the outer flushing coil, and horizontally flushing nozzles are arranged on the side surface of the outer flushing coil; The top of the inner flushing coil is integrally welded to the bottom of the conical sludge discharging pipe, and the inner side wall of the inner flushing coil serves as the sludge suction port of the sludge discharging pipe; The drain port of the jet pump is flange-connected to the first one-way valve; The first one-way valve is flange-connected to the first passage of the first tee; The second passage of the first tee is flange-connected to the first flowmeter; The first flowmeter is flange-connected to the U-shaped jet pipe; The U-shaped jet pipe is embedded and fixed on the conical sludge discharging pipe, and the water outlet of the U-shaped jet pipe is located below the straight section of the sludge discharging pipe. The vertical pipe section of the U-shaped jet pipe embedded inside the conical sludge discharging pipe is coaxial with the straight section of the sludge discharging pipe.

2. The jet mud discharging device in the offshore pile according to claim 1, wherein, The drain port of the flush pump is flange-connected to the second one-way valve; The second one-way valve is flange-connected to the second flowmeter; The second flowmeter is flange-connected to the flushing pipeline; The flushing pipeline is welded and fixed to the top of the inner flushing coil and is communicated with the inner flushing coil.

3. The jet mud discharging device inside the offshore pile according to claim 2, characterized in that, The drain port of the standby pump is flange-connected to the first passage of the second tee; The second passage of the second tee is flange-connected to the second ball valve; The second ball valve is flange-connected to the third flowmeter; The third flowmeter is flange-connected to the standby pump pipeline; The standby pump pipeline is welded and fixed to the top of the inner flushing coil and is communicated with the inner flushing coil; The third passage of the second tee is flange-connected to the first ball valve, and the first ball valve is flange-connected to the third passage of the first tee; Both the first ball valve and the second ball valve are electro-hydraulic remote control ball valves.

4. The jet dredging equipment in the offshore pile according to claim 3, characterized in that The structural framework includes a frame body, a top platform of the frame body, and a middle platform of the frame body. The frame body consists of six square steel pipes, which are evenly distributed and welded to the upper end of the outer ring of the flushing coil pipe at the bottom. The top of the frame body is connected to the top platform of the frame body, and the middle part of the frame body is connected to the middle platform of the frame body. The top platform of the frame body is fixedly welded to the straight section of the sludge discharge pipe. The middle platform of the frame body is fixedly welded to the straight section of the sludge discharge pipe. Three water pumps are fixed on the middle platform of the frame body, and water pump inlets are opened at positions corresponding to the suction ports of the water pumps. Slide shoes are provided on the outer end faces of the frame body.

5. The jet dredging equipment in the offshore pile according to claim 4, characterized in that, The control system includes water pump cables, a control umbilical cable, and an on-water control cabinet. The number of water pump cables is three, which are respectively connected to the jet pump, the flushing water pump, and the standby pump. The control umbilical cable integrates the power supply and control cables of the first ball valve and the second ball valve and the control and signal cables of the first flowmeter, the second flowmeter, and the third flowmeter. An inverter, a ball valve controller, and a flowmeter display are provided on the on-water control cabinet. The number of inverters is four, three are in use and one is in standby. The number of ball valve controllers is two, which can be used as mutual backups for the two ball valves not to act simultaneously. The opening and closing of the inverter and the ball valve controller are both carried out on the on-water control cabinet.

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