Submarine cable laying device and equipment

Abstract

The invention relates to the field of submarine cable laying, in particular to a submarine cable laying device and equipment, which comprises a moving trolley, a drill bit and an embedding plough, the device further comprises a sludge suction unit, a sludge discharge unit and a collection shell; the mud suction unit is arranged at the front end of the drill bit; the two sludge discharge units are located in the moving trolley, are symmetrically arranged about the drill bit and communicate with the sludge suction unit; the collecting shell is arranged at the tail of the moving trolley, a laying groove is reserved in the seabed when the laying device lays the cable, the end, away from the moving trolley, of the collecting shell is of a conical structure, and the projection of the tip end of the conical structure in the vertical direction coincides with the laying groove all the time. The problems that an existing excavator bucket is insufficient in large stone treatment capacity, the single drill bit crushing efficiency is low, and the manual adjustment precision is poor are solved, continuous operation is guaranteed, and the extra load of the moving trolley is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of submarine cable laying, in particular to a submarine cable laying device and equipment. BACKGROUND

[0002] When laying a submarine cable, a device is needed to trench the seabed to form a laying trench, but under the influence of waves and seabed currents, a large amount of sediment will flow into the laying trench, affecting the later laying.

[0003] Chinese patent CN112103851B discloses a submarine cable laying device, which comprises a device body, a connecting rod is welded at the top end of the device body, a connecting chain is fixed on the connecting rod, a first dredging frame is arranged on one side of the connecting rod, a propeller motor is arranged on the other side of the connecting rod, a propeller is arranged on the propeller motor, track brake motors are arranged on both sides of the device body, tracks are arranged on the track brake motors, first mud guide plates are welded on both sides of one end of the device body, a second dredging frame is welded between the two first mud guide plates, a motor fixing plate is welded at the bottom of one end of the second dredging frame, a drill bit brake motor is installed on the motor fixing plate, a rotating rod is fixed to the drill bit brake motor through a shaft coupling, fixed steel plates are uniformly welded on the middle part of the rotating rod, a bucket is welded at the bottom of the motor fixing plate, a cable protection plate is fixed at the other end of the device body, second mud guide plates are welded on both sides of the cable protection plate, roller fixing frames are welded at the four corners of the device body, rollers are fixed at the bottom end of the roller fixing frames, roller shafts are installed in the middle part of the rollers, and roller brake motors are connected to one end of the roller shafts.

[0004] Since the seabed has stones and the like, the above scheme sets a bucket to deal with the stones on the seabed. During laying, the device needs to stop moving when it encounters stones in the front part, and then the stones are excavated by the bucket. However, due to the limited size of the device, the size of the bucket is limited, and it cannot deal with stones that are too large in size. Although the device is provided with a single drill bit, the processing capacity of the single drill bit for stones is limited, and the angle of the drill bit needs to be adjusted manually, which reduces the overall laying efficiency. In addition, when the stones on the seabed are broken, some stones may be buried in the lower part of the seabed sediment, which may cause a cleaning blind area, and the burying plow used for burying the cable may collide with such stones, which may damage the burying plow. In order to improve the efficiency and avoid the above situation, a row of drill bits can be used, and the drill bits need to be always inserted into the seabed sediment. However, due to the resistance of the seabed soil, the load of the device moving is large. Although the device can move while breaking the stones, the energy consumption is high. SUMMARY

[0005] In order to solve the above problems, the submarine cable laying device and equipment are provided, the suction unit with a detection rod, a corner sensor and a lifting mechanism is arranged at the front end of the drill bit, a plurality of groups of crushing assemblies with gradually increased drilling depths are arranged along the length direction, the suction unit first removes the hidden stones, reduces the resistance of the seabed silt to the drill bit, the detection rod and the corner sensor can accurately avoid the collision of the protruding stones on the suction head, and the plurality of groups of drill bits can realize the gradual crushing of the stones.

[0006] In order to solve the problems in the prior art, the submarine cable laying device is provided, which comprises a moving trolley, a drill bit and a burying plow. The device further comprises a suction unit, a silt discharging unit and a collecting shell. The suction unit is arranged at the front end of the drill bit. The silt discharging unit is arranged at the front end of the drill bit. The collecting shell is arranged at the tail of the moving trolley, the laying device leaves a laying groove on the seabed when laying the cable, one end of the collecting shell away from the moving trolley is in a conical structure, and the projection of the tip of the conical structure in the vertical direction always coincides with the laying groove.

[0007] Preferably, a plurality of drill bits are arranged along the width direction of the moving trolley and constitute a crushing assembly, a plurality of groups of crushing assemblies are distributed along the length direction of the moving trolley in the moving trolley, and the drilling depth of the crushing assembly closer to the suction unit is shallower.

[0008] Preferably, the suction unit comprises a suction head and a lifting mechanism. The suction head is horizontally arranged in the moving trolley and located at the front end of the drill bit. The lifting mechanism is arranged at one side of the suction head and used for driving the suction head to lift.

[0009] Preferably, the suction unit further comprises a detection rod and a corner sensor. The detection rod is vertically arranged at the front end of the suction unit, and a plurality of detection rods are arranged along the width direction of the moving trolley. The corner sensor is arranged at one end of the detection rod.

[0010] Preferably, the silt discharging unit comprises a filter cylinder, a silt discharging pipe, a water pumping shell and a water pump. The filter cylinder is vertically arranged in the moving trolley. The two ends of the silt discharging pipe are respectively communicated with the upper part of the filter cylinder and the suction unit. The water pumping shell is sleeved on the periphery of the filter cylinder, and a drainage cavity is formed between the inner wall of the water pumping shell and the outer wall of the filter cylinder. The water pump is arranged on the side wall of the water pumping shell and communicated with the drainage cavity.

[0011] Preferably, the water pump is arranged on the side of the moving trolley.

[0012] Preferably, a scouring plate is arranged horizontally in the filter cylinder and is located directly below the connection between the sludge discharge pipe and the filter cylinder.

[0013] Preferably, the sludge discharge unit further comprises a scraper and a driving unit. The scraper is arranged on the inner wall of the filter cylinder and rotates around the axis of the filter cylinder. The driving unit is arranged on the filter cylinder and is used to drive the rotation of the scraper.

[0014] Preferably, a discharge shell is arranged at the lower part of the filter cylinder, and the discharge shell has a funnel structure. The silt intercepted by the filter cylinder is discharged through the discharge shell.

[0015] The present application also relates to a submarine cable laying device, comprising a submarine cable laying device and a pay-off device.

[0016] The beneficial effects of the present application compared with the prior art are: 1. The suction unit with a detection rod, an angle sensor and a lifting mechanism is arranged at the front end of the drill bit, and a plurality of crushing assemblies arranged along the width direction of the moving trolley and along the length direction are arranged, and the drilling depth of the crushing assemblies is gradually increased. The suction unit first removes the hidden stones in the silt, and at the same time reduces the resistance of the silt on the drill bit. The detection rod and the angle sensor can also accurately avoid the collision of the suction head with the protruding stones. The multiple drill bits can crush the stones step by step, completely solve the problems of insufficient capacity of the existing excavator to handle large stones, low crushing efficiency of a single drill bit and poor accuracy of manual adjustment, and ensure continuous operation.

[0017] 2. The preliminary laying groove is formed in advance by the suction unit, which reduces the friction, adhesion resistance and plowing resistance of the buried plow during the operation of the drill bit. The mud-water is efficiently separated and the silt is orderly accumulated through the scouring plate, scraper and funnel-shaped discharge shell of the sludge discharge unit, which greatly reduces the additional load of the moving trolley, solves the energy consumption and rapid wear of the multi-drill bit scheme, reduces the heat dissipation and endurance pressure of the driving system, and balances the economy and practicability.

[0018] 3. The scouring plate and scraper of the sludge discharge unit avoid the flying of silt, the funnel-shaped discharge shell ensures the concentrated accumulation of silt, and the tail cone-shaped collection shell accurately backfills. At the same time, the suction unit can actively avoid stone collision through the lifting mechanism, effectively avoiding the risk of blade damage, structure deformation and cable rupture caused by the rigid collision of the buried plow and hidden stones, and significantly improving the construction safety and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a three-dimensional schematic diagram of a submarine cable laying device of the present applicationFigure 1 .

[0020] Figure 2 is a perspective view of a submarine cable laying device according to the present application Figure 2 .

[0021] Figure 3 is a perspective view of a submarine cable laying device according to the present application Figure 2 is a partial enlarged view of part A in the figure

[0022] Figure 4 is a sectional perspective view of a submarine cable laying device according to the present application Figure 1 .

[0023] Figure 5 is a perspective view of a submarine cable laying device according to the present application Figure 4 is a partial enlarged view of part B in the figure

[0024] Figure 6 is a sectional perspective view of a submarine cable laying device according to the present application Figure 2 .

[0025] Figure 7 is a sectional perspective view of a submarine cable laying device according to the present application with a moving trolley removed Figure 1 .

[0026] Figure 8 is a sectional perspective view of a submarine cable laying device according to the present application with a moving trolley removed Figure 2 .

[0027] Figure 9 is a partial enlarged view of part C in the figure Figure 8 .

[0028] Reference signs in the figure: 1, moving trolley; 11, drill bit; 12, burying plough; 13, collecting shell; 2, suction unit; 21, suction head; 22, lifting mechanism; 23, detection rod; 24, corner sensor; 25, suction pipe; 3, discharge unit; 31, filter cylinder; 32, discharge pipe; 33, water pumping shell; 34, water pump; 35, anti-impact plate; 36, scraper; 37, driving unit; 371, tooth ring; 372, gear wheel; 373, rotary driver; 38, discharge shell; 4, cable. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means and specific purposes and functions of the present application, the present application is described in further detail below in combination with the drawings and specific embodiments.

[0030] Reference is made to Figure 1 and Figure 2A submarine cable laying device, comprising a moving trolley 1, a drill bit 11 and a burying plow 12; Further comprising a suction unit 2, a discharge unit 3 and a collection shell 13; The suction unit 2 is arranged at the front end of the drill bit 11; The discharge unit 3 is arranged in two and both are arranged in the moving trolley 1, the two discharge units 3 are symmetrically arranged about the drill bit 11, and the two discharge units 3 are both in communication with the suction unit 2; The collection shell 13 is arranged at the tail of the moving trolley 1, and the laying device leaves a laying groove on the seabed when laying the cable 4, the end of the collection shell 13 away from the moving trolley 1 is a tapered structure, and the projection of the tip of the tapered structure in the vertical direction always coincides with the laying groove.

[0031] In the scene of laying the submarine cable 4, the seabed terrain is complex and diverse, and there are various sizes of stone blocks, reefs and other obstacles widely distributed, which become the key restricting factors affecting the laying efficiency and equipment safety. To solve this problem, the existing laying scheme is designed with a bucket structure, and the design logic is that when the current part detection system identifies a stone block obstacle during the forward laying process of the device, the device immediately triggers the stop program, suspends movement, and then starts the bucket to remove the stone block by mechanical excavation, thereby opening a channel for the subsequent burying plow 12 operation.

[0032] However, due to the severe restrictions on the overall size of the seabed operation device, both the lifting and launching space of the mother ship and the passing requirements of the complex seabed terrain are met, and the design size of the bucket is forced to be compressed. This limitation directly leads to a significant limitation of the effective operation volume and excavation force of the bucket. For large stone blocks with a diameter exceeding the opening size of the bucket or a weight exceeding the upper limit of the carrying capacity, the bucket cannot effectively grasp and remove them, and can only rely on subsequent manual assistance, which seriously disrupts the operation process.

[0033] At the same time, although the existing device is equipped with a single drill bit 11 as a supplementary means for breaking stones, this design also has significant defects. On the one hand, the breaking range and impact energy of the single drill bit 11 are limited, and for large or high-hardness stone blocks, multiple repeated operations are often required to complete the breaking, resulting in extremely low processing efficiency. On the other hand, the operation angle of the drill bit 11 is completely dependent on manual remote control, and the operator needs to judge the position and shape of the stone block through the blurred picture returned by the underwater camera, and then manually adjust the attitude of the drill bit 11. This process not only takes a long time, but also the angle control accuracy is difficult to guarantee, and it is easy to cause incomplete breaking, further reducing the operation efficiency.

[0034] More attention is worth noting that the distribution of the seabed stones is not a single exposed state, and part of the stones is in a semi-buried or fully buried state under the seabed silt due to long-term erosion by sea currents and sediment deposition. The identification range of the existing detection system is mainly concentrated above the water-silt interface, and it is difficult to effectively perceive the stones with a buried depth exceeding the detection threshold, forming a clear cleaning blind area. When the burying plow 12 is moving along the preset path with the cable 4, it is easy to collide with these hidden stones, which may cause the blade of the burying plow 12 to break and deform, or even cause the cable 4 to be scratched or broken, resulting in serious equipment damage and economic loss.

[0035] In order to overcome the above situation in the prior art, a single drill bit 11 is arranged as a plurality of drill bits 11 in array, and the head of the drill bit 11 is always at a certain depth below the seabed silt during the movement of the moving trolley 1. By expanding the breaking range and cleaning hidden stones in advance, a continuous operation mode of "breaking while moving" is realized, thereby improving the efficiency and eliminating the cleaning blind area. However, this optimization scheme immediately faces a new technical dilemma: when the drill bit 11 continuously works deep into the silt, it will be subjected to the combined action of frictional resistance, cohesive resistance and lateral pressure of the soil. These resistances will directly translate into additional load for the device movement, resulting in the need for the driving system to output more power to maintain normal travel speed. Although this scheme can achieve the goal of continuous breaking operation, the device energy consumption is significantly increased and the drill bit 11 wears out faster, which not only greatly increases the operation cost, but also puts higher requirements on the heat dissipation and endurance of the driving system, making it difficult to balance the economy and practicality in actual operation.

[0036] In order to avoid the above situation, the existing cable 4 laying device is optimized and designed, so that the cable 4 laying device of the present application can first remove the seabed silt and then discharge the silt to both sides of the laying groove. The drill bits 11 are arranged in an array and extend below the seabed surface. If there is no stone, the seabed silt in front of the drill bits 11 will not cause wear and obstruction to the drill bits 11 due to being removed in advance. If there is a stone in front of the drill bits 11, the drill bits 11 will break the stone. The broken stones are pushed to both sides by the burying plow 12 and collected by the collection shell 13 arranged at the tail of the moving trolley 1, and the silt and broken stones are filled back into the laying groove where the cable 4 is buried. The specific structure and working process of the present application are as follows: The burying plow 12 is also arranged in the moving trolley 1. When the moving trolley 1 starts to work, the lower part of the burying plow 12 extends into the lower part of the seabed silt, and a wire conveying groove is arranged in the middle of the burying plow 12. The cable 4 is output through the wire conveying groove. The burying plow 12 forms a laying groove in the seabed when it moves with the moving trolley 1, and the cable 4 output from the burying groove is arranged in the laying groove.

[0037] When the submarine cable 4 laying operation is carried out, the mobile trolley 1 travels along the preset route, and the suction unit 2 first suctions the silt on the seabed. Under the action of the suction unit 2, the silt at the lower part of the mobile trolley 1 is sucked away and a laying groove is preliminarily formed. At this time, the stones buried in the silt can be exposed, and the end of the drill bit 11 can not be blocked by a large amount of silt when it extends below the seabed ground. The resistance of the mobile trolley 1 during movement is reduced. Since the silt discharge unit 3 is also provided, the silt sucked by the suction unit 2 is discharged into the silt discharge unit 3. The silt discharge unit 3 can separate the silt and seawater, and the two silt discharge units 3 discharge the silt to the two sides of the drill bit 11, so that the silt is accumulated on the two sides of the drill bit 11. When the drill bit 11 contacts the stone, the stone is broken by the drill bit 11. The burying plow 12 moves along the extension direction of the preliminarily formed laying groove and pushes the broken stones and silt to the two sides. The silt and broken stones pushed to the two sides by the burying plow 12 are combined with the silt accumulation discharged by the two silt discharge units 3. At this time, the laying groove is completely formed, and the burying plow 12 delivers the cable 4 into the laying groove. In addition, since the suction unit 2 can preliminarily form the laying groove after suction, the resistance of the burying plow 12 to the seabed ground when plowing is also reduced, further reducing the load of the mobile trolley 1 and the energy consumption. As the mobile trolley 1 continues to move, the accumulation shell 13 provided at the tail of the mobile trolley 1 accumulates the silt accumulated on the two sides of the laying groove, so that the accumulated silt is combined into the upper part of the laying groove, thereby realizing the effect of automatically backfilling the silt by the accumulation shell 13 after the cable 4 is placed in the laying groove.

[0038] With reference to Figures 1-9 The drill bits 11 are transversely arranged in the width direction of the mobile trolley 1, and collectively constitute a breaking assembly. In the mobile trolley 1, multiple breaking assemblies are distributed in the length direction of the mobile trolley 1. The deeper the breaking assembly is, the shallower the drilling depth of the breaking assembly closer to the suction unit 2 is. According to the laying needs, multiple breaking assemblies can be arranged in the length direction of the mobile trolley 1. Each breaking assembly is provided with multiple drill bits 11 moving in the width direction of the mobile trolley 1. The drilling depths of the drill bits 11 in different groups of breaking assemblies are different. The deeper the breaking assembly is, the shallower the drilling depth of the breaking assembly closer to the suction unit 2 is. By arranging multiple breaking assemblies, the stones on the path of the mobile trolley 1 are broken step by step. At the same time, multiple drill bits 11 in each breaking assembly break the stones at the same time, which improves the breaking efficiency of the stones and avoids the damage of the drill bits 11 due to the too deep drilling depth when using a single breaking assembly.

[0039] With reference to Figure 4 The suction unit 2 includes a suction head 21 and a lifting mechanism 22. The suction head 21 is horizontally arranged in the mobile trolley 1 and located at the front end of the drill bit 11. The lifting mechanism 22 is arranged at one side of the suction head 21 and is used to drive the lifting of the suction head 21.

[0040] When the suction head 21 sucks the seabed silt, the closer the suction head 21 is to the seabed, the greater the suction amount of the silt is, so the suction head 21 should be as close to the ground as possible when performing the suction operation. However, the moving trolley 1 will not always be in a horizontal state on the moving path, so in order to avoid the suction head 21 from being in contact with the seabed ground or colliding with the stones left on the seabed ground, the lifting mechanism 22 is arranged at one side of the suction head 21, and the lifting mechanism 22 drives the lifting of the suction head 21 in the vertical direction, so as to ensure that the suction head 21 can move in the vertical direction when moving with the moving trolley 1, thereby avoiding the friction between the suction head 21 and the seabed ground or the collision between the suction head 21 and the seabed stones. Since the lifting mechanism 22 is a prior art and has various types, it will not be described here.

[0041] With reference to Figure 3 The suction unit 2 further comprises a detection rod 23 and a rotation angle sensor 24. The detection rod 23 is vertically arranged at the front end of the suction unit 2, and a plurality of detection rods 23 are arranged along the width direction of the moving trolley 1. A rotation angle sensor 24 is arranged at one end of the detection rod 23.

[0042] When the moving trolley 1 moves, if the front end of the moving trolley 1 has a protruding stone, at this time the detection rod 23 will first come into contact with the protruding stone, and the stone will push the detection rod 23 to tilt, and the rotation angle sensor 24 arranged at one side of the detection rod 23 can detect the rotation angle change of the detection rod 23. A processor is arranged on the moving trolley 1, and the processor can calculate the angle detected by the rotation angle sensor 24, so as to determine the lifting height of the lower end of the detection rod 23, that is, the protruding height of the actual seabed stone. At this time, the lifting mechanism 22 drives the lifting of the suction head 21, so as to avoid the collision between the suction head 21 and the protruding stone. When the lifting height of the lower end of the detection rod 23 gradually decreases, the protruding height of the seabed stone also gradually decreases, and at this time the lifting mechanism 22 drives the lowering of the suction head 21. It is worth noting that the straight-line distance between the suction head 21 and the upper surface of the seabed in the vertical direction needs to be pre-set, so that a fixed distance is always left between the lower part of the suction unit 2 and the upper surface of the seabed, thereby realizing that when the suction head 21 is lifted by the lifting mechanism 22, it not only has a good suction effect on the seabed silt, but also avoids the collision between the suction head 21 and the protruding stone.

[0043] With reference to Figures 5-9 The discharge unit 3 comprises a filter cylinder 31, a discharge pipe 32, a water pumping shell 33 and a water pump 34. The filter cylinder 31 is vertically and rotatably arranged in the moving trolley 1. Two ends of the sludge discharge pipe 32 are communicated with the upper part of the filter cylinder 31 and the sludge suction unit 2 respectively; The water suction shell 33 is sleeved on the periphery of the filter cylinder 31, and a water discharge cavity is formed between the inner wall of the water suction shell 33 and the outer wall of the filter cylinder 31. The water pump 34 is arranged on the side wall of the water suction shell 33 and communicated with the water discharge cavity.

[0044] The sludge suction pipe 25 is arranged on the upper part of the sludge suction head 21, the upper end of the sludge suction pipe 25 is connected with the sludge discharge pipe 32, the sludge discharge pipe 32 is communicated with the sludge suction head 21 through the sludge suction pipe 25, the sludge suction head 21 sucks the seabed silt and discharges into the sludge suction pipe 25 and the sludge discharge pipe 32, and the sludge is discharged into the filter cylinder 31 through the sludge discharge pipe 32. Since the sludge suction head 21 can be freely lifted under the drive of the lifting mechanism 22, the smooth communication between the sludge suction head 21 and the sludge discharge pipe 32 can be ensured by arranging the sludge suction pipe 25. At the same time, the water pump 34 discharges the water flow in the water discharge cavity, and the ratio of the water suction amount of the water pump 34 to the sludge suction amount of the sludge suction head 21 is 3:4. Therefore, although the lower part of the filter cylinder 31 is provided with an opening, under the action of the water pump 34, a one-way suction force from inside to outside is generated at the filter cylinder 31, so that the seawater discharged into the filter cylinder 31 is sucked into the water discharge cavity, and the silt is intercepted on the inner wall of the filter cylinder 31, the silt is discharged from the bottom of the filter cylinder 31 under the action of its own gravity, avoiding the impact of the water flow discharged from the lower opening of the filter cylinder 31 on the settled silt, so that the silt is scattered everywhere. It ensures that the collection shell 13 can push a sufficient amount of silt into the laying groove.

[0045] Referring to Figure 7 : The water discharge end of the water pump 34 is located on the side of the moving trolley 1.

[0046] The water discharge end of the water pump 34 is arranged on the side of the moving trolley 1, so that the seawater filtered through the filter cylinder 31 enters the water discharge cavity and is discharged by the water pump 34, and the discharged water flow will not impact the silt accumulated on both sides of the laying groove, avoiding the phenomenon that the silt is lifted up under the impact of the water flow.

[0047] Referring to Figure 5 and Figure 9 : The anti-impact plate 35 is arranged horizontally in the filter cylinder 31, and the anti-impact plate 35 is located directly below the connection between the sludge discharge pipe 32 and the filter cylinder 31.

[0048] By arranging the anti-impact plate 35, the sludge-water mixture discharged from the sludge discharge pipe 32 can be intercepted, and the flow direction of the sludge-water flow can be changed, so that the sludge-water contacts the anti-impact plate 35 and flows towards the inner wall of the filter cylinder 31, which can guide the sludge-water mixture to flow towards the side wall of the filter cylinder 31, and avoid the sludge-water mixture discharged into the filter cylinder 31 directly from the bottom of the filter cylinder 31 and affect the accumulation of seabed silt.

[0049] Referring toFigure 8 and Figure 9 The sludge discharging unit 3 further comprises a scraper 36 and a driving unit 37. The scraper 36 is arranged on the inner wall of the filter cylinder 31 and rotates around the axis of the filter cylinder 31. The driving unit 37 is arranged on the filter cylinder 31 and is used to drive the scraper 36 to rotate.

[0050] When the filter cylinder 31 filters the sludge and seawater, the scraper 36 rotates in the filter cylinder 31 in real time, and the scraper 36 scrapes the sludge attached to the inner wall of the filter cylinder 31, so that the sludge is discharged from the bottom of the filter cylinder 31. The driving unit 37 comprises a gear ring 371, a gear 372 and a rotary driver 373, the gear ring 371 is arranged at the upper part of the filter cylinder 31, the scraper 36 is vertically arranged at the lower part of the gear ring 371, the scraper 36 rotates synchronously with the gear ring 371, the gear 372 is arranged at one side of the gear ring 371 and is engaged with the gear ring 371, and the rotary driver 373 is arranged at the end of the gear 372 and is used to drive the gear 372 to rotate. The rotary driver 373 is preferably a waterproof motor.

[0051] With reference to Figure 5 A discharging shell 38 is arranged at the lower part of the filter cylinder 31, the discharging shell 38 has a funnel structure, and the sludge intercepted by the filter cylinder 31 is discharged through the discharging shell 38.

[0052] The structure that the upper part of the discharging shell 38 is large in opening and the lower part is small in opening can avoid the influence of the sea bottom water flow disturbance on the sludge filtration, so that the filter cylinder 31 has better filtering property for the sludge, and the amount of the external water flow flowing back into the filter cylinder 31 through the discharging shell 38 is reduced, and the sludge discharged through the discharging shell 38 can be more orderly accumulated at one place and is not easy to be scattered everywhere.

[0053] With reference to Figures 1-9 The application further relates to a submarine cable laying device, which comprises a submarine cable laying device and a pay-off device.

[0054] The cable 4 is stored on the pay-off device, one end of the cable 4 is pulled to the submarine cable laying device, the cable 4 is laid by the submarine cable laying device, and the pay-off device performs real-time pay-off operation.

[0055] Working principle: in the submarine cable 4 laying operation, the equipment equipped with the pay-off device starts according to the preset route, one end of the cable 4 stored in the pay-off device is pulled to the laying device and is paid off synchronously with the movement of the trolley 1. At the beginning of the operation, the suction unit 2 located in front of the drill bit 11 starts first, the suction head 21 of the suction unit 2 is always kept at a preset fixed distance from the seabed surface under the drive of the lifting mechanism 22, and the multiple detection rods 23 distributed along the width direction of the front end of the suction unit 2 will contact the protruding stones on the path before the suction head 21. When the stones push the detection rods 23 to tilt, the corner sensor 24 will send a signal to the processor, accurately judge the protruding height of the stones, and then control the lifting mechanism 22 to adjust the height of the suction head 21, so as to avoid collision and also ensure the suction effect.

[0056] The suction head 21 is communicated with the mud discharge unit 3 through the suction pipe 25 and the mud discharge pipe 32, and the silt under the trolley is sucked into the two filter cartridges 31 symmetrically arranged in the trolley 1 through the mud discharge pipe 32. When the mixture of mud and water enters the filter cartridge 31, it is first intercepted and guided by the anti-collision plate 35 below the mud discharge pipe 32 and flows downward along the wall of the filter cartridge 31; at the same time, the water pump 34 starts to pump out the seawater in the drainage cavity formed by the peripheral water suction shell 33 of the filter cartridge 31, and the pumping amount and the suction amount maintain a ratio of 3:4, so that a one-way suction force from the inside to the outside is generated at the side wall of the filter cartridge 31, the seawater penetrates into the drainage cavity through the cartridge wall and is discharged from the side of the trolley, avoiding the impact on the silt on both sides. During the filtering process, the driving unit 37 drives the scraper 36 to rotate along the inner wall of the filter cartridge 31, and the silt adhered is scraped off, and the silt is discharged through the lower funnel-shaped discharge shell 38 under the action of gravity and is accumulated on both sides of the drill bit 11.

[0057] At this time, the multiple groups of crushing assemblies arranged along the width direction of the trolley and distributed in the length direction start to work, and the closer to the suction unit 2, the shallower the drilling depth of the assemblies, so that the crushing is realized in stages. Because the suction unit 2 has sucked away the silt in advance, the drill bit 11 can smoothly extend below the seabed, without being hindered by a large amount of silt, and the stones buried in the silt can be exposed, the drill bit 11 can directly crush the stones when encountering the stones, and can avoid the abrasion and resistance of the silt on the drill bit 11 when there is no stone, greatly reducing the moving load of the trolley.

[0058] With the advance of the trolley, the buried plow 12 extending into the silt moves along the laying groove preliminarily formed by the suction unit 2, pushes the crushed stones and silt to the side of the laying groove and combines with the accumulated material discharged by the mud discharge unit 3, so that the laying groove is completely formed. At the same time, the cable 4 is transported into the laying groove through the wire trough in the middle of the buried plow 12. When the collection shell 13 at the tail of the trolley passes above the cable 4, the tip of the conical structure of the collection shell 13 is always projected to coincide with the laying groove, the silt and crushed stones accumulated on both sides of the laying groove are collected, and the whole laying process is completed.

[0059] The above embodiments only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the protection scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A submarine cable laying device, comprising a mobile trolley (1), a drill bit (11), and a laying plow (12). Its features are, It also includes a sludge suction unit (2), a sludge discharge unit (3), and a collection shell (13); The mud suction unit (2) is located at the front end of the drill bit (11); There are two mud removal units (3) and both are located inside the moving trolley (1). The two mud removal units (3) are symmetrically arranged about the drill bit (11). Both mud removal units (3) are connected to the mud suction unit (2). The collection shell (13) is located at the rear of the mobile trolley (1). When the laying device lays the cable (4), it leaves a laying groove on the seabed. The end of the collection shell (13) away from the mobile trolley (1) is a conical structure, and the projection of the tip of the conical structure in the vertical direction always coincides with the laying groove.

2. The submarine cable laying device according to claim 1, characterized in that, The drill bit (11) is arranged in multiple ways along the width direction of the moving trolley (1) and forms a crushing component. Multiple sets of crushing components are distributed along the length direction of the moving trolley (1). The closer the crushing component is to the mud suction unit (2), the shallower its drilling depth.

3. The submarine cable laying device according to claim 1, characterized in that, The sludge suction unit (2) includes a sludge suction head (21) and a lifting mechanism (22); The suction head (21) is horizontally positioned in the moving trolley (1) and located at the front end of the drill bit (11); The lifting mechanism (22) is located on one side of the suction head (21) and is used to drive the suction head (21) to lift.

4. The submarine cable laying device according to claim 3, characterized in that, The suction unit (2) also includes a probe (23) and a rotation sensor (24); The probe rod (23) is vertically set at the front end of the sludge suction unit (2), and multiple probe rods (23) are set along the width direction of the moving trolley (1); An angle sensor (24) is installed at one end of the probe (23).

5. The submarine cable laying device according to claim 1, characterized in that, The sludge discharge unit (3) includes a filter cylinder (31), a sludge discharge pipe (32), a water pump shell (33), and a water pump (34). The filter cartridge (31) is vertically rotated and set in the moving trolley (1); The two ends of the sludge discharge pipe (32) are connected to the upper part of the filter cylinder (31) and the sludge suction unit (2), respectively; The water suction shell (33) is fitted around the filter cylinder (31), and a drainage cavity is formed between the inner wall of the water suction shell (33) and the outer wall of the filter cylinder (31). The water pump (34) is installed on the side wall of the pumping shell (33) and communicates with the drainage chamber.

6. The submarine cable laying device according to claim 5, characterized in that, The drain end of the water pump (34) is located on the side of the mobile trolley (1).

7. A submarine cable laying device according to claim 5, characterized in that, An anti-surge plate (35) is horizontally installed in the filter cylinder (31), and the anti-surge plate (35) is located directly below the connection between the sludge discharge pipe (32) and the filter cylinder (31).

8. A submarine cable laying device according to claim 5, characterized in that, The sludge removal unit (3) also includes a scraper (36) and a drive unit (37); The scraper (36) is rotatably mounted on the inner wall of the filter cylinder (31) around the axis of the filter cylinder (31); The drive unit (37) is mounted on the filter cartridge (31) and is used to drive the scraper (36) to rotate.

9. A submarine cable laying device according to claim 5, characterized in that, A discharge shell (38) is provided at the bottom of the filter cylinder (31). The discharge shell (38) has a funnel-shaped structure, and the mud and sand intercepted by the filter cylinder (31) are discharged through the discharge shell (38).

10. A submarine cable laying device, characterized in that, Includes a submarine cable laying device and a cable laying device as described in any one of claims 1-9.

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