An undersea cable laying apparatus

Abstract

The application belongs to the technical field of submarine cable laying, in particular to a submarine cable laying device, which comprises a cable laying device main body, the bottom end of the cable laying device main body is fixedly connected with a first bottom plate and a second bottom plate, the first bottom plate and the second bottom plate are in contact with the seabed, a connecting frame is fixedly connected to the cable laying device main body, and a connecting rope is fixedly connected to the connecting frame; through the structural design of the paddle, in the process of moving the cable laying main body driven by the ship, the water flow passes through the water flow channel, the water flow drives the fan blade to rotate, the fan blade drives the first rotating block, the rotating column and the first bevel gear to rotate, the first bevel gear drives the second bevel gear and the first rotating shaft to rotate, the first rotating shaft drives the second rotating block and the paddle to rotate, and the paddles on both sides can throw the soil on both sides of the ditch into the ditch, which can continuously throw soil in the process and does not need a power source, thereby realizing the function of throwing soil into the ditch to bury the optical cable.

Description

TECHNICAL FIELD

[0001] The application relates to a submarine optical cable laying device. BACKGROUND

[0002] The submarine optical cable is a wire wrapped with insulating material and is laid on the seabed to set up the telecommunication transmission between countries. During the laying of the submarine optical cable, a special submarine optical cable laying device is needed to lay the cable. The submarine optical cable laying device first digs a trench on the seabed and then buries the optical cable in the trench.

[0003] The existing submarine optical cable laying device usually comprises a water spraying device and a sea plow device. The water spraying device sprays a trench on the seabed through a high-pressure water pump and a high-pressure water pipe. The sea plow device can guide the optical cable to be buried in the trench and cover the optical cable with the soil driven by the natural sea current.

[0004] However, the current submarine optical cable laying device is inconvenient to bury the dug trench, and the burying through the natural sea current has many influences and cannot effectively cover the optical cable. Moreover, the soil covered through the natural sea current is loose, and the soil can also be easily blown away by other sea currents. Therefore, the submarine optical cable laying device is proposed to solve the above problems. SUMMARY

[0005] In order to make up for the deficiencies of the prior art, the current submarine optical cable laying device is inconvenient to bury the dug trench, and the burying through the natural sea current has many influences and cannot effectively cover the optical cable. Moreover, the soil covered through the natural sea current is loose, and the soil can also be easily blown away by other sea currents. Therefore, the submarine optical cable laying device is proposed to solve the above problems.

[0006] The technical scheme adopted by the application to solve the technical problems is that the submarine optical cable laying device comprises a main body of the optical cable laying device, a first bottom plate and a second bottom plate are fixedly connected to the bottom end of the main body of the optical cable laying device, the first bottom plate and the second bottom plate are in contact with the seabed, a connecting frame is fixedly connected to the main body of the optical cable laying device, a connecting rope is fixedly connected to the connecting frame, the connecting rope is connected to a ship, an optical cable guide pipe is fixedly connected to the main body of the optical cable laying device, an optical cable is arranged in the optical cable guide pipe, the optical cable guide pipe is used for guiding the optical cable to be buried on the seabed, a high-pressure water pump is installed on the main body of the optical cable laying device, a high-pressure water pipe is installed on the high-pressure water pump, the high-pressure water pipe is perpendicular to the seabed and is located at the middle part of the main body of the optical cable laying device, the high-pressure water pump and the high-pressure water pipe are used for spraying a trench on the seabed, and a soil throwing assembly is installed on the optical cable guide pipe.

[0007] Preferably, the soil throwing assembly comprises a connecting block fixed on the optical cable guide pipe, two first boxes are fixed on the connecting block, a rotating column is rotatably connected to each of the first boxes through a bearing, a first rotating block is fixed on the surface of the rotating column and located in the first box, a plurality of fan blades are fixed on the first rotating block, a second box is fixed on the bottom of each of the first boxes, a first bevel gear is fixed on the bottom end of the rotating column, a first rotating shaft is rotatably connected to each of the second boxes through a bearing, a second bevel gear is fixed on one end of the first rotating shaft, the second bevel gear is engaged with the first bevel gear, a second rotating block is fixed on the other end of the first rotating shaft, a plurality of poking blades are fixed on the second rotating block, and the poking blades are used to throw the soil on both sides of the trench into the trench.

[0008] Preferably, a second rotating shaft is rotatably connected to one of the second boxes through a bearing, a third bevel gear is fixed on one end of the second rotating shaft, a fourth bevel gear is fixed on the surface of one of the rotating columns and engaged with the third bevel gear, a first rotating plate is fixed on the other end of the second rotating shaft, a connecting column is fixed on the first rotating plate, a limiting block is slidably connected to the connecting block, the connecting column is slidably connected in the limiting block, a connecting rod is rotatably connected to one end of the limiting block through a pin shaft, a supporting plate is fixed on the bottom of each of the first boxes, the connecting rod is rotatably connected to the two supporting plates through pin shafts, a pressing plate is fixed on one end of the connecting rod, and the pressing plate is used to compact the thrown soil.

[0009] Preferably, a third rotating shaft is rotatably connected to the other second box through a bearing, a fifth bevel gear is fixed on one end of the third rotating shaft, a sixth bevel gear is fixed on the surface of the other rotating column and engaged with the fifth bevel gear, a second rotating plate is fixed on the other end of the third rotating shaft, a connecting rod is rotatably connected to the second rotating plate through a pin shaft, a horizontal plate is rotatably connected to the top end of the connecting rod through a pin shaft, a vertical column is fixed on one end of the horizontal plate, a piston block is fixed on the bottom end of the vertical column, a piston cylinder is arranged directly below the piston block, the piston block is slidably inserted in the piston cylinder, a through hole is formed in the piston cylinder, a horizontal block is fixed on the bottom of the piston cylinder, and a vertical pipe is fixed on the bottom of the horizontal block.

[0010] Preferably, an insertion plate is fixed on the optical cable guide pipe, the bottom end of the insertion plate is tapered, and the tapered insertion plate is used to facilitate insertion into the seabed.

[0011] Preferably, a water flow channel is formed in each of the first boxes, the water flow channel is used for seawater to flow through, and three of the fan blades are located in the water flow channel.

[0012] Preferably, two baffle plates are fixed on each of the second boxes, the baffle plates are used to block the seawater in front from affecting the poking blades, and the baffle plates are arc-shaped.

[0013] Preferably, two fixing plates are fixedly connected on the connecting block, a guide column is fixedly connected between the two fixing plates, a lifting block is slidably connected on the guide column, a rectangular opening is formed in the lifting block, and the guide column slidably penetrates through the rectangular opening.

[0014] Preferably, a limiting opening is formed in the limiting block, and the connecting column is slidably connected in the limiting opening.

[0015] Preferably, a circular hole is formed in the top end of the piston cylinder, the piston block slidably penetrates through the circular hole, a cavity is formed in the cross block, and the cross block is in communication with the piston cylinder and the vertical pipe.

[0016] The present application has the advantages of:

[0017] 1. In the process of moving the ship to drive the optical cable laying main body, the water flow passes through the water flow channel, the water flow drives the fan blade to rotate, the fan blade drives the first rotating block, the rotating column and the first bevel gear to rotate, the first bevel gear drives the second bevel gear and the first rotating shaft to rotate, the first rotating shaft drives the second rotating block and the driving blade to rotate, and the driving blades on both sides can throw the soil on both sides of the ditch into the ditch, which realizes the function of throwing the soil into the ditch to bury the optical cable, and solves the problem that the current submarine optical cable laying device is not convenient to bury the dug ditch.

[0018] 2. In the process of rotating the fan blade and the driving blade, the rotating column drives the fourth bevel gear and the third bevel gear to rotate, the third bevel gear drives the second rotating shaft and the first rotating plate to rotate, the first rotating plate drives the connecting column to rotate, the connecting column drives the limiting block to make reciprocating motion in the vertical direction through the limiting opening, the limiting block drives one end of the connecting rod to make reciprocating motion in the vertical direction, so that the other end of the connecting rod drives the pressing plate to reciprocate around the pin shaft, the pressing plate can compact the ditch where the soil is just thrown, and prevent the soil from being blown away by the sea current, thereby solving the problem that the soil covered by the natural sea current is relatively loose. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0021] Figure 2It is a partial perspective view of the present application;

[0022] Figure 3 It is a second partial perspective view of the present application;

[0023] Figure 4 It is a third partial perspective view of the present application;

[0024] Figure 5 It is a cross-section view of the present application;

[0025] Figure 6 It is a fourth partial perspective view of the present application;

[0026] Figure 7 It is a first box cross-section view of the present application.

[0027] In the figure: 1, optical cable laying device main body; 2, first bottom plate; 3, second bottom plate; 4, connecting frame; 5, connecting rope; 6, optical cable guide pipe; 7, high-pressure water pump; 8, connecting block; 9, first box; 10, rotating column; 11, first rotating block; 12, fan blade; 13, second box; 14, first bevel gear; 15, first rotating shaft; 16, second bevel gear; 17, second rotating block; 18, push blade; 19, second rotating shaft; 20, third bevel gear; 21, fourth bevel gear; 22, first rotating plate; 23, connecting column; 24, limiting block; 25, connecting rod; 26, support plate; 27, pressing plate; 28, third rotating shaft; 29, fifth bevel gear; 30, sixth bevel gear; 31, second rotating plate; 32, connecting rod; 33, cross plate; 34, vertical column; 35, piston block; 36, piston cylinder; 37, through hole; 38, cross block; 39, vertical pipe; 40, insertion plate; 41, water flow channel; 42, baffle; 43, fixed plate; 44, guide column; 45, lifting block; 46, rectangular port; 47, limiting port; 48, round hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0029] Please refer to Figures 1-7As shown, a submarine optical cable laying device, including optical cable laying device body 1, first bottom plate 2, second bottom plate 3, optical cable guide pipe 6 and high pressure water pump 7, the bottom end of the optical cable laying device body 1 is fixedly connected with the first bottom plate 2 and the second bottom plate 3, the first bottom plate 2 and the second bottom plate 3 are in contact with the seabed, the optical cable laying device body 1 is fixedly connected with the connecting frame 4, the connecting frame 4 is fixedly connected with the connecting rope 5, the connecting rope 5 is connected with the ship, the optical cable laying device body 1 is connected on the ship through the connecting rope 5, the optical cable laying device body 1 is put into the sea and sinks to the seabed, the ship pulls the optical cable laying device body 1 to move, the optical cable laying device body 1 is fixedly connected with the optical cable guide pipe 6, the optical cable guide pipe 6 is provided with an optical cable, the optical cable guide pipe 6 is used for guiding the optical cable to the seabed for burying, the optical cable on the ship passes through the optical cable guide pipe 6, the optical cable laying device body 1 is provided with the high pressure water pump 7, the high pressure water pump 7 is provided with the high pressure water pipe, the high pressure water pipe is opposite to the seabed and is located in the middle of the optical cable laying device body 1, the high pressure water pump 7 and the high pressure water pipe are used for jetting a trench on the seabed, the high pressure water pump 7 is started, the high pressure water pump 7 flushes out a trench on the seabed through the high pressure water pipe, the optical cable guide pipe 6 guides the optical cable into the trench, the optical cable guide pipe 6 is provided with the soil throwing assembly.

[0030] The soil throwing assembly includes a connecting block 8 fixedly connected to the optical cable guide pipe 6, two first box bodies 9 fixedly connected to the connecting block 8, rotating columns 10 rotatably connected to the first box bodies 9 through bearings, first rotating blocks 11 fixedly connected to the surfaces of the rotating columns 10 and located in the first box bodies 9, a plurality of fan blades 12 fixedly connected to the first rotating blocks 11, in the process of moving forward of the optical cable laying device body 1, seawater passes through the first box bodies 9, the seawater passing through can drive the fan blades 12 to rotate, the fan blades 12 can drive the first rotating blocks 11 to rotate, the bottoms of the first box bodies 9 are fixedly connected with second box bodies 13, the bottom ends of the rotating columns 10 are fixedly connected with first bevel gears 14, the first rotating blocks 11 drive the rotating columns 10 to rotate, the rotating columns 10 drive the first bevel gears 14 to rotate, the second box bodies 13 are rotatably connected with first rotating shafts 15 through bearings, the first rotating shafts 15 are fixedly connected with second bevel gears 16 at one end, the second bevel gears 16 are engaged with the first bevel gears 14, the first bevel gears 14 drive the second bevel gears 16 to rotate, the second bevel gears 16 drive the first rotating shafts 15 to rotate, the other ends of the first rotating shafts 15 are fixedly connected with second rotating blocks 17, the first rotating shafts 15 drive the second rotating blocks 17 to rotate, a plurality of poking blades 18 are fixedly connected to the second rotating blocks 17, the poking blades 18 are used for throwing the soil on both sides of the trench to the trench, the second rotating blocks 17 drive the poking blades 18 to rotate, the poking blades 18 can throw the soil on both sides of the trench to the trench, achieving the purpose of burying the buried optical cable by using the potential energy of the water flow without power source.

[0031] One of the second box 13 is rotatably connected with a second shaft 19 through the bearing, one end of the second shaft 19 is fixedly connected with a third bevel gear 20, one surface of the rotating column 10 is fixedly connected with a fourth bevel gear 21, the fourth bevel gear 21 is engaged with the third bevel gear 20, at the same time the rotating column 10 can drive the fourth bevel gear 21 to rotate, the fourth bevel gear 21 drives the third bevel gear 20 to rotate, the third bevel gear 20 drives the second shaft 19 to rotate, the other end of the second shaft 19 is fixedly connected with a first rotating plate 22, the second shaft 19 drives the first rotating plate 22 to rotate, the first rotating plate 22 is fixedly connected with a connecting column 23, the connecting block 8 is slidably connected with a limiting block 24, the connecting column 23 is slidably connected in the limiting block 24, the first rotating plate 22 drives the limiting block 24 to do reciprocating motion in the vertical direction through the connecting column 23, one end of the limiting block 24 is rotatably connected with a connecting rod 25 through the pin shaft, the bottom of the two first boxes 9 is fixedly connected with a support plate 26, the connecting rod 25 is rotatably connected on the two support plates 26 through the pin shaft, one end of the connecting rod 25 is driven by the limiting block 24 to reciprocate around the pin shaft, one end of the connecting rod 25 is fixedly connected with a pressing plate 27, the pressing plate 27 is used for compacting the thrown soil, the other end of the connecting rod 25 drives the pressing plate 27 to reciprocate, the pressing plate 27 can compact the soil on the ditch, prevent the soil from being washed away by the sea current.

[0032] Another said second box 13 is rotatably connected with a third rotating shaft 28 through a bearing, one end of the third rotating shaft 28 is fixedly connected with a fifth bevel gear 29, the surface of another said rotating column 10 is fixedly connected with a sixth bevel gear 30, the sixth bevel gear 30 is engaged with the fifth bevel gear 29, while throwing soil, one of the rotating column 10 drives the sixth bevel gear 30, the sixth bevel gear 30 drives the fifth bevel gear 29 to rotate, the fifth bevel gear 29 drives the third rotating shaft 28 to rotate, the other end of the third rotating shaft 28 is fixedly connected with a second rotating plate 31, the third rotating shaft 28 drives the second rotating plate 31 to rotate, the second rotating plate 31 is rotatably connected with a connecting rod 32 through a pin shaft, the second rotating plate 31 drives the connecting rod 32 to move, the top end of the connecting rod 32 is rotatably connected with a horizontal plate 33 through a pin shaft, the connecting rod 32 drives the horizontal plate 33 to do reciprocating motion in the vertical direction, one end of the horizontal plate 33 is fixedly connected with a vertical column 34, the bottom end of the vertical column 34 is fixedly connected with a piston block 35, the horizontal plate 33 drives the vertical column 34 and the piston block 35 to do reciprocating motion in the vertical direction, the piston block 35 is slidably inserted into a piston cylinder 36 below, the piston block 35 moves back and forth in the piston cylinder 36, a through hole 37 is formed in the piston cylinder 36, the bottom of the piston cylinder 36 is fixedly connected with a horizontal block 38, the bottom of the horizontal block 38 is fixedly connected with a vertical pipe 39, when the piston block 35 is higher than the through hole 37, seawater is sucked into the piston cylinder 36, when the piston block 35 moves downward, the piston block 35 can spray seawater from the vertical pipe 39 through the piston cylinder 36 and the horizontal block 38 to the lower side, the sprayed water can throw the pushing blade 18 to blow the soil of the ditch downward, so that the soil quickly falls into the ditch.

[0033] The optical cable guide pipe 6 is fixedly connected with an insertion plate 40, the bottom end of the insertion plate 40 is tapered, the tapered insertion plate 40 is used for facilitating insertion into the seabed, by arranging the insertion plate 40, the insertion plate 40 is inserted into the ditch, and the buried optical cable is opened.

[0034] The two said first boxes 9 are provided with water flow channels 41, the water flow channels 41 are used for seawater to flow through, and three said fan blades 12 are located in the water flow channels 41, during the forward movement of the optical cable laying device main body 1, seawater passes through the water flow channels 41 of the first boxes 9, and the seawater passing through drives the fan blades 12 to rotate.

[0035] Two said second boxes 13 are fixedly connected with two baffles 42, the baffles 42 are used for blocking seawater in front from affecting the pushing blade 18, the baffles 42 are arc-shaped, by arranging the baffles 42, the impact of seawater in front on the pushing blade 18 can be blocked, and the rotation of the pushing blade 18 is prevented from being affected.

[0036] The connecting block 8 is fixed with two fixed plates 43, the two fixed plates 43 are fixed with a guide column 44, the guide column 44 is slidably connected with a lifting block 45, the lifting block 45 is provided with a rectangular opening 46, the guide column 44 slidably penetrates the rectangular opening 46, and the lifting block 45 slides on the guide column 44 through the rectangular opening 46 to limit the limiting block 24 in the vertical direction.

[0037] The limiting block 24 is provided with a limiting opening 47, and the connecting column 23 is slidably connected in the limiting opening 47. When the connecting column 23 slides in the limiting opening 47, the connecting column 23 can drive the limiting opening 47 and the limiting block 24 to move in the vertical direction.

[0038] The top end of the piston cylinder 36 is provided with a circular hole 48, and the piston block 35 slidably penetrates the circular hole 48. When the piston block 35 and the horizontal plate 33 move, the piston block 35 slides in the circular hole 48 of the piston cylinder 36 to limit the piston block 35 and the horizontal plate 33 in the vertical direction. The horizontal block 38 is provided with a cavity, and the horizontal block 38 communicates with the piston cylinder 36 and the vertical pipe 39. The seawater entering from the through hole 37 is sprayed downward from the horizontal block 38 and the vertical pipe 39.

[0039] Working principle: when in use, the optical cable on the ship is passed through the optical cable guide pipe 6, the optical cable laying device main body 1 is connected to the ship through the connecting rope 5, the optical cable laying device main body 1 is put into the sea and sinks to the seabed, the ship pulls the optical cable laying device main body 1 to move, the high-pressure water pump 7 is started, the high-pressure water pump 7 flushes out a trench on the seabed through the high-pressure water pipe, the optical cable guide pipe 6 guides the optical cable into the trench, the plug-in plate 40 is inserted into the trench to open the road for the laying of the optical cable, in the process of the forward movement of the optical cable laying device main body 1, the seawater will pass through the water flow channel 41 of the first box body 9, the seawater passing through can drive the fan blade 12 to rotate, the fan blade 12 can drive the first rotating block 11 to rotate, the first rotating block 11 drives the rotating column 10 to rotate, the rotating column 10 drives the first bevel gear 14 to rotate, the first bevel gear 14 drives the second bevel gear 16 to rotate, the second bevel gear 16 drives the first rotating shaft 15 to rotate, the first rotating shaft 15 drives the second rotating block 17 to rotate, the second rotating block 17 drives the poking blade 18 to rotate, the poking blade 18 can throw the soil on both sides of the trench into the trench, realizing the purpose of burying the laid optical cable by using the potential energy of the water flow without power source, while throwing the soil, one of the rotating columns 10 will drive the sixth bevel gear 30, the sixth bevel gear 30 drives the fifth bevel gear 29 to rotate, the fifth bevel gear 29 drives the third rotating shaft 28 to rotate, the third rotating shaft 28 drives the second rotating plate 31 to rotate, the second rotating plate 31 drives the connecting rod 32 to move, the connecting rod 32 drives the horizontal plate 33 to do reciprocating motion in the vertical direction, the horizontal plate 33 drives the vertical column 34 and the piston block 35 to do reciprocating motion in the vertical direction, the piston block 35 moves back and forth in the piston cylinder 36, when the piston block 35 is higher than the through hole 37, the seawater will be sucked into the piston cylinder 36, when the piston block 35 moves downward, the piston block 35 can spray the seawater from the vertical pipe 39 through the piston cylinder 36 and the horizontal block 38 downward, the sprayed water can blow the soil thrown by the poking blade 18 downward, so that the soil quickly falls into the trench, at the same time, the other rotating column 10 can drive the fourth bevel gear 21 to rotate, the fourth bevel gear 21 drives the third bevel gear 20 to rotate, the third bevel gear 20 drives the second rotating shaft 19 to rotate, the second rotating shaft 19 drives the first rotating plate 22 to rotate, the first rotating plate 22 drives the limiting block 24 to do reciprocating motion in the vertical direction through the connecting column 23, the limiting block 24 drives one end of the connecting rod 25 to rotate reciprocatingly around the pin shaft, the other end of the connecting rod 25 will drive the pressing plate 27 to rotate reciprocatingly, the pressing plate 27 can compact the soil on the trench, preventing the soil from being scattered by the sea current.

[0040] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, the above embodiments and descriptions in the specification are only to illustrate the principle of the present application, various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A submarine optical cable laying device, comprising an optical cable laying device body (1), a first bottom plate (2) and a second bottom plate (3) are fixedly connected to the bottom end of the optical cable laying device body (1), the first bottom plate (2) and the second bottom plate (3) are in contact with the seabed, a connecting frame (4) is fixedly connected to the optical cable laying device body (1), characterized in that: The connecting frame (4) is fixedly connected with a connecting rope (5), the connecting rope (5) is connected with a ship, the optical cable laying device body (1) is fixedly connected with an optical cable guide pipe (6), the optical cable guide pipe (6) is provided with an optical cable, the optical cable guide pipe (6) is used for guiding the optical cable to the seabed for burying, the optical cable laying device body (1) is provided with a high-pressure water pump (7), the high-pressure water pump (7) is provided with a high-pressure water pipe, the high-pressure water pipe is opposite to the seabed and located at the middle of the optical cable laying device body (1), the high-pressure water pump (7) and the high-pressure water pipe are used for spraying a trench on the seabed, and the optical cable guide pipe (6) is provided with a soil throwing assembly. The soil throwing assembly comprises a connecting block (8) fixedly connected with the optical cable guide pipe (6), two first box bodies (9) fixedly connected with the connecting block (8), rotating columns (10) rotatably connected with the first box bodies (9) through bearings, first rotating blocks (11) fixedly connected with the surfaces of the rotating columns (10) and located in the first box bodies (9), a plurality of fan blades (12) fixedly connected with the first rotating blocks (11), second box bodies (13) fixedly connected with the bottoms of the first box bodies (9), first bevel gears (14) fixedly connected with the bottom ends of the rotating columns (10), first rotating shafts (15) rotatably connected with the second box bodies (13) through bearings, second bevel gears (16) fixedly connected with one ends of the first rotating shafts (15), the second bevel gears (16) meshing with the first bevel gears (14), second rotating blocks (17) fixedly connected with the other ends of the first rotating shafts (15), and a plurality of poking blades (18) fixedly connected with the second rotating blocks (17), wherein the poking blades (18) are used for throwing the soil on both sides of the trench to the trench. One of the second box bodies (13) is rotatably connected with a second rotating shaft (19) through a bearing, a third bevel gear (20) is fixedly connected with one end of the second rotating shaft (19), a fourth bevel gear (21) is fixedly connected with the surface of one of the rotating columns (10), the fourth bevel gear (21) meshes with the third bevel gear (20), a first rotating plate (22) is fixedly connected with the other end of the second rotating shaft (19), a connecting column (23) is fixedly connected with the first rotating plate (22), a limiting block (24) is slidably connected with the connecting block (8), the connecting column (23) is slidably connected in the limiting block (24), a connecting rod (25) is rotatably connected with one end of the limiting block (24) through a pin shaft, two branch plates (26) are fixedly connected with the bottoms of the two first box bodies (9), the connecting rod (25) is rotatably connected with the two branch plates (26) through pin shafts, a pressing plate (27) is fixedly connected with one end of the connecting rod (25), and the pressing plate (27) is used for compacting the thrown soil.

2. A submarine cable laying apparatus according to claim 1, characterised in that: Another said second box (13) is rotatably connected with a third rotating shaft (28) through a bearing, one end of the third rotating shaft (28) is fixedly connected with a fifth bevel gear (29), the surface of the other said rotating column (10) is fixedly connected with a sixth bevel gear (30), the sixth bevel gear (30) is engaged with the fifth bevel gear (29), the other end of the third rotating shaft (28) is fixedly connected with a second rotating plate (31), the second rotating plate (31) is rotatably connected with a connecting rod (32) through a pin shaft, the top end of the connecting rod (32) is rotatably connected with a horizontal plate (33), one end of the horizontal plate (33) is fixedly connected with a vertical column (34), the bottom end of the vertical column (34) is fixedly connected with a piston block (35), the piston block (35) is slidably inserted into a piston cylinder (36) below, a through hole (37) is formed in the piston cylinder (36), the bottom of the piston cylinder (36) is fixedly connected with a horizontal block (38), the bottom of the horizontal block (38) is fixedly connected with a vertical pipe (39).

3. A submarine cable laying apparatus according to claim 2, characterised in that: The plug-in plate (40) is fixedly connected to the optical cable guide pipe (6), the bottom end of the plug-in plate (40) is tapered, and the tapered plug-in plate (40) is used for facilitating insertion into the seabed.

4. An undersea cable laying apparatus according to claim 3, wherein: Two said first box (9) is provided with water flow channel (41), the water flow channel (41) is used for sea water flow, wherein three said fan blade (12) is located in the water flow channel (41).

5. An undersea cable laying apparatus according to claim 4, wherein: Two said second box (13) is fixedly connected with two baffles (42), the baffle (42) is used for blocking the front sea water to affect the actuating vane (18), the baffle (42) is arc-shaped.

6. An undersea cable laying apparatus according to claim 5, wherein: The connecting block (8) is fixedly connected with two fixed plates (43), two said fixed plate (43) is fixedly connected with a guide column (44), the guide column (44) is slidably connected with a lifting block (45), the lifting block (45) is provided with a rectangular opening (46), the guide column (44) slidably penetrates the rectangular opening (46).

7. A submarine cable laying apparatus according to claim 6, characterised in that: The limiting block (24) is provided with a limiting opening (47), and the connecting column (23) is slidably connected in the limiting opening (47).

8. An undersea cable laying apparatus according to claim 7, wherein: The top end of the piston cylinder (36) is provided with a circular hole (48), the piston block (35) slidably penetrates the circular hole (48), the horizontal block (38) is provided with a cavity, and the horizontal block (38) is in communication with the piston cylinder (36) and the vertical pipe (39).

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