A marine winch for hydrological and geological survey

Abstract

The present application relates to the field of marine winch, in particular to a marine winch for hydrology and geological survey. It comprises a lifting device, a guide wheel assembly and a limiting and cleaning mechanism. The lifting device comprises a steel rope and a winding and unwinding device. The guide wheel assembly is rotatably arranged on the top of the outer end of the winding and unwinding device. The limiting and cleaning mechanism comprises a limiting frame rotatably arranged below the guide wheel assembly and two groups of roller clamping assemblies oppositely arranged on the limiting frame. The roller clamping assembly comprises a mounting rod, a rotating shaft rotatably arranged on the mounting rod, an outer wheel coaxially arranged on the rotating shaft, a gas guide shell arranged on the mounting rod through a fixing rod, a piston cylinder arranged on the mounting rod through a connecting frame, a piston slidably arranged in the piston cylinder, a transmission assembly in transmission connection with the rotating shaft and the piston, and an air pipe communicated between the piston cylinder and the gas guide shell. The present application can reduce the abrasion between the steel rope and the guide wheel and the outer wheel, clean the water and silt attached to the steel rope, and prolong the service life of the steel rope.

Description

Technical Field

[0001] This invention relates to the field of marine winches, and in particular to a marine winch for hydrological and geological surveys. Background Technology

[0002] For hydrological and geological survey vessels, a winch can be used to lower a towed sonar from the side of the hull. The steel cable is looped around the annular groove on the outer circumference of the guide wheel at the top of the outer end of the winch, and the towed sonar installed at the movable end of the steel cable is lowered into the water. While the survey vessel is moving, the towed sonar collects underwater topographic data.

[0003] However, because the steel rope is partially submerged in water, and because it is made of multiple strands of twisted steel wire with an uneven surface, it is prone to accumulating water or mud. After prolonged use, the steel rope is prone to rusting, and the high hardness of mud and sand can easily wear down the steel rope, leading to a reduced service life. In addition, the guide wheel at the top of the winch is set in a fixed position. Under the influence of water flow on the towed sonar and the hull, the steel rope will sway irregularly, causing frequent friction between the steel rope and the edge of the annular groove on the outer periphery of the guide wheel in the fixed position. This results in faster wear of the steel rope, further reducing its service life. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a marine winch for hydrological and geological surveys. This winch can guide the steel rope through a guide wheel assembly and a limit cleaning mechanism. The guiding direction changes dynamically with the steel rope, reducing wear between the steel rope and the guide wheel and outer wheel. It can also clean the water and mud on the steel rope by blowing air, making the steel rope less prone to rust and comprehensively extending the service life of the steel rope.

[0005] The technical solution of this invention is a marine winch for hydrological and geological surveys, comprising a hoisting device, a guide wheel assembly, and a limiting and clearing mechanism; the hoisting device includes a steel rope and a winding and unwinding device for winding the steel rope; the guide wheel assembly is rotatably disposed on the top of the outer end of the winding and unwinding device for the steel rope to pass over; the limiting and clearing mechanism includes a limiting frame rotatably disposed below the guide wheel assembly and two sets of roller clamp assemblies arranged opposite to each other on the limiting frame, the roller clamp assembly including a mounting rod, a rotating shaft rotatably disposed on the mounting rod, an outer wheel coaxially disposed on the rotating shaft, an air guide shell disposed on the mounting rod via a fixing rod, a piston cylinder disposed on the mounting rod via a connecting frame, and a slidably disposed on the movable... The piston inside the piston cylinder, the transmission assembly connected to the rotating shaft and piston to drive the piston to reciprocate when the rotating shaft rotates, and the vent pipe connecting the piston cylinder and the air guide shell, the outer wheel has an installation cavity inside, the air guide shell is coaxially set in the outer wheel installation cavity and fits against the inner wall of the outer wheel, the outer circumference of the outer wheel has an annular concave groove and multiple air holes evenly distributed in the groove, the outer circumference of the air guide shell has air port one and air port two, the air port two faces the horizontal direction, the air port one and air port two alternately communicate with the air hole, when the steel rope is wound, when the air port one communicates with the air hole, air is drawn from the outside to the inside of the air guide shell, when the air port two communicates with the air hole, air is blown into the steel rope through the air hole.

[0006] Preferably, the steel rope drives the piston to move through the outer wheel, the rotating shaft and the transmission assembly. When the first air port is disconnected from the air hole, the second air port begins to connect with the other air hole. When the second air port is disconnected from the air hole, the first air port begins to connect with the other air hole.

[0007] Preferably, the opening sizes of the air holes, air inlet one, and air inlet two are the same, and the included angle formed by the line connecting the same end of two adjacent air holes to the center axis of the outer wheel is four times the included angle formed by the line connecting the two ends of a single air hole to the center axis of the outer wheel.

[0008] Preferably, the projected shape of the pores is rectangular.

[0009] Preferably, the limiting frame includes a rotating drum, a mounting plate, and two sets of extrusion assemblies. The top end of the mounting rod is hinged to the mounting plate, the rotating drum is located on the top of the mounting plate, and the extrusion assembly includes a threaded knob threaded to the mounting plate and a side plate located on the outer side of the mounting rod. The end of the threaded knob abuts against the side plate, and a vertical clamping channel for clamping the steel rope is formed between the two outer wheels.

[0010] Preferably, the guide wheel assembly includes a rotating column, a rotating frame disposed at the bottom of the rotating column, and two guide wheels rotatably disposed on the rotating frame. The guide wheels have annular guide grooves on their outer circumferences. The rotating drum is rotatably disposed at the bottom of the rotating frame and has a rope-passing channel for the steel rope to pass through. A vertical rope-winding channel is formed between the two guide wheels and is located directly above the roller clamp channel.

[0011] Preferably, a base frame is provided at the bottom of the piston, and a U-shaped brush plate with an opening facing the side is provided on the base frame. Brush bristles are provided on the inner side of the brush plate, and a steel rope passes through the inner side of the brush bristles.

[0012] Preferably, the take-up and unwinding device includes a mounting base, a mounting shaft rotatably mounted on the mounting base, a drum mounted on the mounting shaft, a geared motor mounted on the mounting base and driving the mounting shaft to rotate, and a guide assembly that is pulsatorically connected to the mounting shaft and mounted on the mounting base. The guide assembly includes a reciprocating screw rotatably mounted on the mounting base, a slider that forms a helical transmission pair with the reciprocating screw, a wheel frame rotatably mounted on the slider, and two rollers rotatably mounted side by side on the wheel frame.

[0013] Compared with existing technologies, the present invention has the following beneficial technical effects: The present invention guides the steel rope through a guide wheel assembly and a limiting cleaning mechanism. The guiding direction dynamically changes with the steel rope, reducing wear between the steel rope and the guide wheel and outer wheel. The limiting cleaning mechanism can also remove moisture and mud from the steel rope by blowing air, making the steel rope less prone to rust and wear from mud and sand, thus comprehensively extending the service life of the steel rope. The guiding assembly guides the winding and unwinding of the steel rope, allowing it to spirally wind onto the drum. This spiral winding method improves the utilization rate of the drum's winding area. Furthermore, the guiding assembly and the mounting shaft are linked, both using a geared motor as a power source, resulting in high energy efficiency, saving labor, and improving winding and unwinding efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure for guiding the winding of a steel rope; Figure 3 A schematic diagram of the structure for guiding the steel rope; Figure 4 A partial sectional view of the structure of the steel rope being clamped and air being blown onto it; Figure 5 A cross-sectional view of the outer wheel and air guide shell; Figure 6 This is a schematic diagram of the air guide shell structure; Figure 7 This is a schematic diagram of the outer wheel structure; Figure 8 This is a partial structural cross-sectional view of a steel rope being cleaned by brush bristles according to an embodiment of the present invention.

[0015] Reference numerals: 1. Base; 2. Outer shell one; 3. Outer shell two; 4. Gear motor; 5. Mounting shaft; 6. Drum; 7. Chain; 8. Reciprocating screw; 9. Slider; 10. Wheel frame; 11. Roller; 12. Steel rope; 13. Support frame; 14. Top plate; 15. Rotating column; 16. Rotating frame; 17. Guide wheel; 18. Rotating drum; 19. Mounting plate; 20. Mounting rod; 21. Side plate; 2 2. Threaded knob; 23. Shaft; 24. Outer wheel; 241. Groove; 242. Air hole; 25. Air guide shell; 251. Air port one; 252. Air port two; 26. Fixed rod; 27. Rotating rod; 28. Connecting rod; 29. ​​Sliding rod; 30. Piston; 31. Piston cylinder; 32. Connecting frame; 33. Vent pipe; 34. Base frame; 35. Brush plate; 36. Brush bristles; 37. Towed sonar. Detailed Implementation

[0016] Example 1: As Figures 1-7 As shown in the figure, this embodiment proposes a marine winch for hydrological and geological surveys, which includes a hoisting device, a guide wheel assembly, and a limiting and cleaning mechanism.

[0017] like Figure 1 and Figure 2 As shown, the hoisting device includes a steel rope 12 and a winding and unwinding device for the steel rope 12. The winding and unwinding device includes a mounting base, a mounting shaft 5 rotatably mounted on the mounting base, a drum 6 mounted on the mounting shaft 5, a reduction motor 4 mounted on the mounting base and driving the mounting shaft 5 to rotate, and a guide assembly that is connected to the mounting shaft 5 and mounted on the mounting base. The mounting base includes a base 1, a first outer shell 2, a second outer shell 3, a support frame 13, and a top plate 14. The first outer shell 2, the second outer shell 3, and the support frame 13 are all mounted on the base 1, and the reduction motor 4 is located inside the first outer shell 2. The support frame 13 is inclined upwards, and the top plate 14 is located at the top of the support frame 13. The mounting shaft 5 is rotatably mounted on the first outer shell 2 and the second outer shell 3. The reduction motor 4 can drive the mounting shaft 5 to rotate forward and backward, thereby driving the drum 6 to rotate forward and backward, thus winding and unwinding the steel rope 12. One end of the steel rope 12 is connected to the drum 6, and then passes through the guide assembly, the guide wheel assembly, and the limiting and cleaning mechanism in sequence, extending to the other end (movable end), where a towed sonar 37 is installed. Once the towed sonar 37 is lowered into the water, it can collect underwater topographic data as the survey vessel moves through the water, facilitating topographic surveying.

[0018] like Figure 1 and Figure 2 As shown, the guiding assembly includes a reciprocating screw 8 rotatably mounted on housing 2 and housing 3, a slider 9 forming a helical transmission pair with the reciprocating screw 8, a wheel frame 10 rotatably mounted on the slider 9, and two rollers 11 rotatably mounted side-by-side on the wheel frame 10. The rollers 11 have annular grooves on their outer circumferences. A steel rope 12 passes through a channel between the two rollers 11, the channel being adapted to the size of the steel rope 12. The rollers 11 guide the winding and unwinding of the steel rope 12, allowing it to spirally wind or release on the drum 6. Because the steel rope 12 passes through the channel between the two rollers 11, when a towed sonar 37 is installed at the movable end of the steel rope 12, the towed sonar 37 acts as a counterweight, keeping the steel rope 12 taut. The steel rope 12 itself also provides a certain degree of restraint to the rollers 11, wheel frame 10, and slider 9, enabling the slider 9 to reciprocate on the reciprocating screw 8. To ensure the slider 9 moves more accurately along a straight line, a guide rod parallel to the reciprocating screw 8 can be installed between the outer casing 2 and the second outer casing 3. The slider 9 is then slidably mounted on the guide rod. A chain drive connects the mounting shaft 5 and the reciprocating screw 8. This chain drive structure is located inside the second outer casing 3. A sprocket is mounted on the mounting shaft 5, and a sprocket is mounted on the reciprocating screw 8. A chain 7 meshes between the sprockets. The mounting shaft 5 drives the reciprocating screw 8 to rotate via the chain drive. The reciprocating screw 8 drives the slider 9 to move back and forth, which in turn drives the wheel frame 10 to move back and forth. Two rollers 11 then reciprocate to guide the steel rope 12 for winding or releasing.

[0019] like Figure 3 As shown, the guide wheel assembly is rotatably mounted on the top of the outer end of the winding and unwinding device, allowing the steel rope 12 to pass through. The guide wheel assembly includes a rotating column 15 rotatably mounted on the top plate 14, a rotating frame 16 mounted at the bottom of the rotating column 15, and two guide wheels 17 rotatably mounted on the rotating frame 16. The guide wheels 17 have annular guide grooves on their outer circumferences, with rounded edges. A rotating drum 18 is rotatably mounted at the bottom of the rotating frame 16, and the rotating drum 18 has a rope-passing channel for the steel rope 12 to pass through. A vertical rope-winding channel is formed between the two guide wheels 17. As the steel rope 12 passes around the guide wheels 17 and through the rope-winding channel, the rotating column 15 also rotates on the top plate 14 as the position of the steel rope 12 changes on the drum 6, causing the orientation of the guide wheels 17 to change accordingly. The steel rope 12 can be aligned with the annular guide groove on the guide wheel 17 and led out vertically downwards. The steel rope 12 will not frequently rub against the edge of the guide groove on the outer circumference of the guide wheel 17, thereby reducing wear between the steel rope 12 and the guide wheel 17.

[0020] like Figures 3-7 As shown, the limiting cleaning mechanism includes a limiting frame rotatably mounted below the guide wheel assembly and two sets of roller clamp assemblies arranged opposite each other on the limiting frame. The roller clamp assemblies include a mounting rod 20, a rotating shaft 23 rotatably mounted on the mounting rod 20, an outer wheel 24 coaxially mounted on the rotating shaft 23, a vent housing 25 mounted on the mounting rod 20 via a fixing rod 26, a piston cylinder 31 mounted on the mounting rod 20 via a connecting frame 32, a piston 30 slidably mounted inside the piston cylinder 31, a transmission assembly connected to the rotating shaft 23 and the piston 30 to drive the piston 30 to reciprocate when the rotating shaft 23 rotates, and a vent pipe 33 connecting the piston cylinder 31 and the vent housing 25. The transmission assembly includes a rotating rod 27, a connecting rod 28, and a sliding rod 29 rotatably connected in sequence. The rotating rod 27 is mounted on the rotating shaft 23, and the sliding rod 29 is mounted on the piston 30. The sliding rod 29 slides through the top of the piston cylinder 31, which is vertically distributed. The outer wheel 24 has an internal mounting cavity with one side open. The air guide shell 25 is coaxially mounted inside the mounting cavity of the outer wheel 24 and fits against the inner wall of the outer wheel 24. The outer circumference of the outer wheel 24 has an annular concave groove 241 and multiple air holes 242 evenly distributed in the groove 241. The edges of the groove 241 are rounded to prevent wear on the steel rope 12. The outer circumference of the air guide shell 25 has an air port 1 251 and an air port 252. The air port 252 faces horizontally, and the height of the air port 1 251 is lower than the height of the air port 252.

[0021] Air inlet 251 and air inlet 252 are alternately connected to air hole 242. When the steel rope 12 is wound up, when air inlet 251 is connected to air hole 242, air is drawn from the outside to the inside of air shell 25. When air inlet 252 is connected to air hole 242, air is blown onto the steel rope 12 through air hole 242 to clean the water and mud adhering to the surface of the steel rope 12.

[0022] Specifically, the steel rope 12 is rolled between two outer wheels 24. When the steel rope 12 is wound up, it drives the two outer wheels 24 to rotate. The steel rope 12 drives the piston 30 to move back and forth through the outer wheels 24, the rotating shaft 23 and the transmission assembly. When the piston 30 moves upward, the first air port 251 begins to disconnect from the connection with an air hole 242. That is, the first air port 251 is subsequently blocked by the outer wheel 24. The second air port 252 begins to connect with another air hole 242. The piston 30 forces the gas in the piston cylinder 31 into the air guide shell 25 through the vent pipe 33 and discharges it through the connected second air port 252 and air hole 242. The gas is blown toward the surface of the steel rope 12 rolled by the outer wheels 24, which to some extent blows away the moisture, mud and other debris attached to the surface of the steel rope 12. As piston 30 moves downward, port 252 begins to disconnect from one of the air holes 242, meaning port 252 is subsequently blocked by outer wheel 24. Port 251 then connects to another air hole 242, drawing gas from the outside into the air guide housing 25, preparing for the next exhaust cycle. For the above extraction and exhaust processes, the positional changes of outer wheel 24 and air guide housing 25 themselves act as one-way valves, enabling unidirectional extraction and exhaust.

[0023] The opening sizes of vent 242, air inlet 1 251, and air inlet 252 are the same, and the projected shape of vent 242 is rectangular. The included angle formed by the line connecting the same end of two adjacent vents 242 to the central axis of the outer wheel 24 is four times the included angle formed by the line connecting the two ends of a single vent 242 to the central axis of the outer wheel 24. That is, the angle of the fan-shaped area formed by two adjacent vents 242 and the central axis of the outer wheel 24 is four times the angle of the fan-shaped area formed by the two ends of a single vent 242 and the central axis of the outer wheel 24, so that air inlet 1 251 and air inlet 252 can alternately connect with two vents 242 in different directions, and the alternation process is seamless. For example, eight vents 242 are evenly arranged, the angle of the fan-shaped area formed by two adjacent vents 242 and the central axis of the outer wheel 24 is 45 degrees, and the angle of the fan-shaped area formed by the two ends of the circumference of a single vent 242 and the central axis of the outer wheel 24 is 11.25 degrees. The following example illustrates the reason for setting the two angles to a four-fold relationship: When air port 1 251 begins to disconnect from one air hole 242, air port 252 begins to prepare to connect with another air hole 242. As the outer wheel 24 rotates, during the process of rotating 11.25 degrees (twice the angle, i.e., 22.5 degrees), air port 252 remains connected to air hole 242, and the degree of connection first increases and then decreases. Air port 1 251 remains blocked by the outer wheel 24. After the outer wheel 24 rotates 22.5 degrees, air port 1 251 is in a state of preparing to connect with the next air hole 242, and air port 252 is in a state of preparing to disconnect from the previous air hole 242.

[0024] like Figures 3-5As shown, the limiting frame includes a rotating drum 18, a mounting plate 19, and two sets of extrusion assemblies. The top end of the mounting rod 20 is hinged to the mounting plate 19, and the rotating drum 18 is located on the top of the mounting plate 19. The extrusion assembly includes a threaded knob 22 threadedly connected to the mounting plate 19 and a side plate 21 located on the outer surface of the mounting rod 20. The end of the threaded knob 22 abuts against the side plate 21. By rotating the threaded knob 22, the side plate 21 can be pushed downwards, causing the mounting rod 20 to rotate. The mounting rod 20 drives the outer wheel 24 to rotate via the rotating shaft 23, clamping the steel rope 12 between the grooves 241 of the two outer wheels 24, ensuring that the outer wheels 24 can rotate when the steel rope 12 moves. A vertical clamping channel for the steel rope 12 is formed between the two outer wheels 24. The rope winding channel is located directly above the clamping channel. Since the steel rope 12 passes through the rope winding channel and the rope threading channel and continues to pass through the clamping channel, when the part of the steel rope 12 that extends downward out of the clamping channel tilts and wobbles, it will drive the rotating drum 18 to rotate on the rotating frame 16, so that the orientation of the two outer wheels 24 changes accordingly. The steel rope 12 will not rub frequently against the edge of the groove 241, thereby reducing the wear between the steel rope 12 and the outer wheels 24.

[0025] In addition, a turntable can be installed between the base 1 and the hull. The turntable is rotated and installed on the hull, which makes it convenient to rotate the outer end of the winch (outer end of the support frame 13) out to the outside of the hull or into the inside of the hull. The hull is equipped with an existing locking structure that can lock the turntable. For example, when the outer circumference of the turntable has a toothed groove, the locking structure is a structure in which the front end can extend forward to engage with the toothed groove, so that the turntable is maintained in the adjusted position.

[0026] This embodiment is installed on a hydrological and geological survey vessel. The support frame 13 can extend from the side of the hull to the outside of the hull. The steel cable 12 is unwound via a winding and unwinding device, and the towed sonar 37 installed at the movable end of the steel cable 12 is lowered into the water. When the survey vessel is moving, the towed sonar 37 is used to collect underwater topographic data. This embodiment can guide the steel cable 12 through a guide wheel assembly and a limiting and cleaning mechanism. The guiding direction changes dynamically with the steel cable 12, reducing wear between the steel cable 12 and the guide wheel 17 and the outer wheel 24. The limiting and cleaning mechanism can also remove moisture and silt from the steel cable by blowing air, making the steel cable less prone to rust and wear from silt, thus extending the service life of the steel cable 12. Meanwhile, the guide component guides the winding and unwinding of the steel rope 12, enabling the steel rope 12 to spirally wind onto the drum 6 or spirally unwind. The spiral winding method can improve the utilization rate of the winding area of ​​the drum 6. Furthermore, the guide component and the mounting shaft 5 are linked and both use the geared motor 4 as the power source, which is highly energy efficient. There is no need to arrange separate personnel to assist in winding the steel rope 12, saving labor and improving the winding and unwinding efficiency.

[0027] Example 2: This example proposes a ship winch for hydrological and geological surveys. The difference between this example and Example 1 is as follows: Figure 8As shown, a base frame 34 is provided at the bottom of the piston 30. A U-shaped brush plate 35 with an opening facing the side is provided on the base frame 34. Brush bristles 36 are provided on the inner side of the brush plate 35, and the brush bristles 36 are made of plastic. The steel cable 12 passes through the inner side of the brush bristles 36. When the piston 30 moves up and down reciprocally inside the piston cylinder 31, it can drive the brush plate 35 to move up and down reciprocally through the base frame 34, thereby using the reciprocating brush bristles 36 to clean the steel cable 12. The cleaning range of the brush bristles 36 effectively covers the circumference of the steel cable 12.

[0028] This embodiment can remove moisture, mud, and other debris adhering to the steel rope 12 to a certain extent by reciprocating the movement of the bristles 36. In conjunction with air cleaning, it improves the cleaning effect on the steel rope 12, making the steel rope 12 less prone to rust, effectively extending the life of the steel rope 12, and is more energy-efficient and environmentally friendly.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A marine winch for hydrological and geological surveys, characterized in that, include: The hoisting device includes a steel rope (12) and a winding device for winding and unwinding the steel rope (12); The guide wheel assembly is rotatably mounted on the top of the outer end of the take-up and unwinding device; The limiting cleaning mechanism includes a limiting frame rotatably mounted below the guide wheel assembly and two sets of roller clamp assemblies arranged opposite each other on the limiting frame. The roller clamp assembly includes a mounting rod (20), a rotating shaft (23) rotatably mounted on the mounting rod (20), an outer wheel (24) coaxially mounted on the rotating shaft (23), a guide air housing (25) mounted on the mounting rod (20) via a fixing rod (26), a piston cylinder (31) mounted on the mounting rod (20) via a connecting frame (32), a piston (30) slidably mounted in the piston cylinder (31), a transmission assembly that is drively connected to the rotating shaft (23) and the piston (30), and a vent pipe connecting the piston cylinder (31) and the guide air housing (25). (33) The outer wheel (24) has an installation cavity inside. The air guide shell (25) is coaxially arranged in the installation cavity of the outer wheel (24) and fits against the inner wall of the outer wheel (24). The outer circumference of the outer wheel (24) has an annular concave groove (241) and multiple air holes (242) evenly distributed in the groove (241). The outer circumference of the air guide shell (25) has an air port one (251) and an air port two (252). The air port two (252) faces the horizontal direction. The air port one (251) and the air port two (252) alternately communicate with the air hole (242). When the steel rope (12) is wound up, when the air port two (252) communicates with the air hole (242), air is blown into the steel rope (12) through the air hole (242).

2. The marine winch for hydrological and geological surveys according to claim 1, characterized in that, The steel rope (12) drives the piston (30) to move through the outer wheel (24), the rotating shaft (23) and the transmission assembly. When the first air port (251) is disconnected from the connection with one air hole (242), the second air port (252) begins to connect with another air hole (242). When the second air port (252) is disconnected from the connection with one air hole (242), the first air port (251) begins to connect with another air hole (242).

3. A marine winch for hydrological and geological surveys according to claim 2, characterized in that, The opening sizes of the air holes (242), air inlet one (251) and air inlet two (252) are the same. The included angle formed by the line connecting the same end of two adjacent air holes (242) to the central axis of the outer wheel (24) is four times the included angle formed by the line connecting the two ends of a single air hole (242) to the central axis of the outer wheel (24).

4. A marine winch for hydrological and geological surveys according to claim 3, characterized in that, The projected shape of the pore (242) is rectangular.

5. A marine winch for hydrological and geological surveys according to claim 1, characterized in that, The limiting frame includes a rotating drum (18), a mounting plate (19), and two sets of extrusion assemblies. The top end of the mounting rod (20) is hinged to the mounting plate (19). The rotating drum (18) is set on the top of the mounting plate (19). The extrusion assembly includes a threaded knob (22) threaded to the mounting plate (19) and a side plate (21) set on the outer side of the mounting rod (20). The end of the threaded knob (22) abuts against the side plate (21). A vertical roller clamping channel for the roller clamping steel rope (12) is formed between the two outer wheels (24).

6. A marine winch for hydrological and geological surveys according to claim 5, characterized in that, The guide wheel assembly includes a rotating column (15), a rotating frame (16) set at the bottom of the rotating column (15), and two guide wheels (17) rotatably set on the rotating frame (16). The guide wheels (17) have annular guide grooves on their outer circumference. A rotating drum (18) is rotatably set at the bottom of the rotating frame (16). The rotating drum (18) has a rope-passing channel for the steel rope (12) to pass through. A vertical rope-winding channel is formed between the two guide wheels (17). The rope-winding channel is located directly above the roller clamp channel.

7. A marine winch for hydrological and geological surveys according to claim 1, characterized in that, A base frame (34) is provided at the bottom of the piston (30), and a U-shaped brush plate (35) with an opening facing the side is provided on the base frame (34). Brush bristles (36) are provided on the inner side of the brush plate (35), and a steel rope (12) passes through the inner side of the brush bristles (36).

8. A marine winch for hydrological and geological surveys according to claim 1, characterized in that, The winding and unwinding device includes a mounting base, a mounting shaft (5) rotatably mounted on the mounting base, a drum (6) mounted on the mounting shaft (5), a geared motor (4) mounted on the mounting base and driving the mounting shaft (5) to rotate, and a guide assembly that is connected to the mounting shaft (5) and mounted on the mounting base. The guide assembly includes a reciprocating screw (8) rotatably mounted on the mounting base, a slider (9) that forms a helical transmission pair with the reciprocating screw (8), a wheel frame (10) rotatably mounted on the slider (9), and two rollers (11) rotatably mounted side by side on the wheel frame (10).

Images