A coastal tide level forecasting device

Abstract

A coastal tide level forecasting device includes a floating unit and a sinking unit. The floating unit can be connected to the sinking unit and sink to the bottom of the water following the sinking unit; then, it detaches from the sinking unit by adjusting the buoyancy of the floating unit and floats to the water surface. The floating unit and the sinking unit are connected by a measuring rope, and the water depth is measured by the length of the measuring rope pulled out. In the present invention, different from the traditional sea tide prediction structure, first, the floating unit falls to the bottom of the water following the sinking unit, and then the floating unit rises by changing its own buoyancy, reducing the influence of water flow on the device, making the displacement of the device smaller and the measurement more accurate.

Description

Technical Field

[0001] The present invention relates to the field of tidal level forecasting, and specifically to a coastal tidal level forecasting device. Background Art

[0002] Tidal level forecasting is an important element of marine security. The changes in coastal tidal levels are directly related to aspects such as the entry and exit of ships in ports, the design of marine and coastal engineering, the prediction of storm tides, and tidal power generation. It can reduce the losses caused by tidal changes to fisheries, repair the disaster prevention and mitigation environment, and ensure the safe navigation of fishing vessels. A tide gauge well is a fixed and reliable facility for providing long-term fixed-point tidal level measurement. Although tidal phenomena are basic marine dynamic phenomena in shallow sea areas, with the continuous development of science, the need for climate change and satellite data verification has put forward higher requirements for the measurement of tide gauge wells. Currently, most tidal level prediction devices are fixed on the coast. Due to the continuous impact of water energy brought by tides, there is a risk of device damage. At the same time, the oscillating energy of waves easily causes inaccurate measurement results of tidal levels.

[0003] Chinese invention with publication number CN113405633B discloses a floating-based marine tidal level forecasting electronic device, including a tidal level monitor, a floating base, and a stabilizing component. The tidal level monitor is installed on the floating base through bolts, and the stabilizing component is installed on the lower end surface of the floating base. However, in this invention, there are still problems such as the device being unstable, being greatly affected by water flow and strong winds, and its position being prone to deviation. Summary of the Invention

[0004] The purpose of the present invention is to provide a coastal tidal level forecasting device.

[0005] The purpose of the present invention is achieved through such a technical solution. It includes a floating unit and a sinking unit. The floating unit can be connected to the sinking unit and sink to the bottom of the water following the sinking unit; then, by adjusting the buoyancy of the floating unit, it can be detached from the sinking unit and float to the water surface.

[0006] The floating unit and the sinking unit are connected by a measuring rope, and the water depth is measured by the length of the measuring rope pulled out.

[0007] In the present invention, different from the traditional sea tide prediction structure, first, the floating unit sinks to the bottom of the water following the sinking unit, and then the floating unit rises by changing its own buoyancy, reducing the influence of water flow on the device, making the deviation of the device position smaller and the measurement more accurate.

[0008] Furthermore, the gravity of the sinking unit is less than the maximum buoyancy provided by the floating unit, and the sinking unit can be fixedly connected to or detached from the bottom of the water.

[0009] In the present invention, when recovery is needed, the sinking unit can rise under the drive of the driving device and the measuring rope, facilitating recovery.

[0010] Furthermore, the floating unit and the sinking unit can be magnetically connected; the force pulling down the floating unit generated by the magnetic force is less than the upward buoyancy provided by the maximum buoyancy of the floating unit.

[0011] In the present invention, during the falling process of the floating unit and the sinking unit, magnetic connection can reduce the impact of water flow and reduce the position deviation; after the floating unit needs to sink with the sinking unit, when detaching, the floating unit is adjusted to increase its buoyancy. After the buoyancy is greater than the magnetic connection force, the floating unit floats up and detaches from the sinking unit.

[0012] Furthermore, the measuring cable can pull down the floating unit floating on the water surface to straighten the measuring cable.

[0013] In the present invention, when the floating unit floats on the water surface and the sinking unit sinks to the bottom of the water, pulling down the measuring cable can straighten the measuring cable, which can not only reduce the influence of tides on the device, but also make the measurement result of the distance between the floating unit and the sinking unit more accurate.

[0014] Furthermore, a shaking power generator is installed on the measuring cable, and the current output end of the shaking power generator is connected to the current input end of the alarm; the alarm is installed on the floating unit to monitor the tide size and give an alarm in the straightened state of the measuring cable.

[0015] In the present invention, since the sinking unit and the floating unit are respectively located at the bottom of the water and on the water surface when working in water, the shaking power generator can be used to charge the alarm separately, which is convenient for early warning; combining the power generation of the shaking power generator and the change amount of the measuring cable within a preset time can more accurately give an early warning of the tide.

[0016] Furthermore, one end of the measuring cable is fixedly connected to a roller, and the other end is fixedly connected to the floating unit. The roller is connected to a driving structure through a transmission structure; the roller is installed in the sinking unit through a second spring and can be lifted and lowered.

[0017] In the present invention, since the floating unit is located on the water surface and the roller is located at the bottom of the water, when recovering the measuring cable, it is impossible to accurately know the water entry area of the floating unit and whether the measuring cable is straightened; therefore, the roller and the second spring are designed to cooperate, and by only controlling the deformation amount of the spring, the water entry area of the floating unit can be adjusted and the measuring cable can be ensured to be in a straightened state, making the measurement more accurate.

[0018] Furthermore, the floating unit includes an eighth mounting plate and a floating ball. A through hole for accommodating the floating ball is opened in the center of the eighth mounting plate. The floating ball is installed in the through hole through a traction rope, and the floating ball is fixedly connected to one end of the measuring cable.

[0019] Further, a fixing plate and a rotating plate are also installed on the upper surface of the eighth mounting plate. The fixing plate is hinged to the rotating plate through a first torsion spring. In the natural state of the first torsion spring, the rotating plate is located above the floating ball;

[0020] A pressing plate is installed below the floating ball in a liftable manner. The pressing plate is lifted and lowered under the drive of a drive structure, and cooperates with the rotating plate to press the floating ball;

[0021] The floating ball stores reaction water and a reaction box. The reaction box is crushed under the extrusion of the pressing plate and the rotating plate, reacts with the reaction water to generate gas, and the floating ball expands to turn the rotating plate over above the fixing plate.

[0022] In the present invention, by squeezing the reaction box in the floating ball, the reaction box reacts with the reaction water, thereby changing the buoyancy of the floating ball. The structure is simple and the cost is low.

[0023] Further, a drill bit is also installed in the sinking unit. The drill bit is conical and has threads on its outer wall. The tip of the drill bit can extend downward out of the bottom of the sinking unit, and the drill bit is driven by a drive structure.

[0024] In the present invention, by controlling the drill bit, the sinking unit can be fixed to the bottom of the water or separated from the bottom of the water. The operation is simple and the stability is strong.

[0025] Further, a first magnet is also fixedly connected to the lower surface of the eighth mounting plate. The upper end surface of the sinking unit includes a hollow mounting cylinder, and the first magnet can be adsorbed on the outer wall of the hollow mounting cylinder.

[0026] In the present invention, the hollow mounting cylinder can connect the sinking unit and the floating unit into a whole, so as to maintain integrity during the falling process.

[0027] Other advantages, objectives and features of the present invention will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings of the present invention are described as follows.

[0029] Figure 1 is a schematic structural diagram of the present invention;

[0030] Figure 2 is a schematic structural diagram inside the mounting base;

[0031] Figure 3 is an exploded schematic diagram of the fifth connecting rod and the sixth lifting rod;

[0032] Figure 4Schematic connection diagram of a floating ball, a swaying generator and a measuring rope

[0033] Figure 5 Schematic diagram of the transmission structure when the floating unit is separated from the sinking unit

[0034] Figure 6 Schematic diagram of the transmission structure during the preparation work of the drill bit

[0035] Figure 7 Schematic diagram of the transmission structure when the measuring rope is lengthened or shortened

[0036] Figure 8 Schematic diagram of the transmission structure when preparing to extrude the floating ball

[0037] In the figure: 1. Floating unit; 2. Sinking unit; 3. Measuring rope; 4. Drill bit; 5. Eighth mounting plate; 6. Floating ball; 7. Fixed plate; 8. Rotating plate; 9. First torsion spring; 10. Alarm; 11. First magnet; 12. Connecting rope; 13. Swaying generator; 15. Mounting base; 16. Hollow mounting cylinder; 17. Balancing plate; 18. First mounting plate; 19. Second spring; 20. Support plate; 21. Roller; 22. First screw; 23. First cylinder; 24. First gear; 25. Second mounting rod; 26. Third mounting rod; 27. Second gear; 28. First sprocket; 29. Second sprocket; 31. Fourth mounting rod; 32. Third gear; 33. Second screw; 34. Fifth connecting rod; 35. Sixth lifting rod; 36. Sliding block; 37. Seventh mounting block; 38. First chute; 39. Extrusion block; 40. Fourth gear; 41. First motor; 42. Third screw; 45. Second motor; 49. Electric wire; 50. Chain disc. Detailed implementation manners

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0040] As Figure 1 shown, a coastal tide level forecasting device, the coastal tide level forecasting device includes a floating unit 1 and a sinking unit 2 that can change their own buoyancy;

[0041] The floating unit 1 is located above the sinking unit 2 and is connected to the sinking unit 2 through a measuring rope 3. The floating unit 1 can sink into the water following the sinking unit 2, or can change its buoyancy to float to the water surface. The floating unit 1 can control the volume exposed above the water surface through the measuring rope 3 and the sinking unit 2;

[0042] The sinking unit 2 can sink to the bottom of the water and be fixed on the sediment at the bottom of the water through a drill bit 4. And when the drill bit 4 is retracted, it can also be pulled below the floating unit 1 through the measuring rope 3.

[0043] In this example, the device is placed in a pre-set water area. The floating unit sinks into the water together with the sinking unit. Subsequently, the drill bit in the sinking unit drills into the sediment at the bottom of the water for fixation. Subsequently, the floating unit changes its buoyancy and rises to the water surface. The measuring rope can control the volume of the floating unit exposed above the water surface.

[0044] As Figure 1 、 Figure 4 shown, the floating unit 1 includes an eighth mounting plate 5. A through hole for accommodating a floating ball 6 is provided at the center of the eighth mounting plate 5. The floating ball 6 is suspended in the through hole by a plurality of traction ropes. A reaction reagent capable of generating a large amount of gas is contained in the floating ball 6;

[0045] The upper surface of the eighth mounting plate 5 is also provided with a fixing plate 7. One end of the fixing plate 7 close to the through hole is also hinged with a rotating plate 8. The rotating plate 8 is located above the floating ball 6 and can block the floating ball 6 when no gas is generated in the floating ball 6. A first torsion spring 9 is also fixedly connected between the fixing plate 7 and the rotating plate 8. The upper surface of the eighth mounting plate 5 is also provided with a plurality of alarms 10.

[0046] The lower surface of the eighth mounting plate 5 is also fixedly connected with a first magnet 11. The first magnet 11 is in the shape of a circular ring with a hollow interior. The lower part of the floating ball 6 is connected to one end of a connecting rope 12. The other end of the connecting rope 12 is connected to one end of a shaking generator 13. The other end of the shaking generator 13 is connected to one end of a measuring pulling rope 3. The other end of the measuring pulling rope 3 is connected to the sinking unit 2. The current output end of the shaking generator 13 is connected to the alarm 10 through a wire 49.

[0047] In this example, when the floating ball located in the eighth mounting plate falls into the water, it follows the sinking unit to descend. When the sinking unit is at the bottom of the water, the drill bit works to drill into the bottom for fixation. Subsequently, the floating ball undergoes a reaction after being squeezed, and the ball is filled with gas. The floating ball squeezes the rotating plate above the fixation and drives the entire floating unit to float upward. The first magnet detaches from the sinking unit under the upward pulling force and floats upward together with the eighth mounting plate. The shaking generator also floats upward following the floating ball. When the water flow generated by the tide is too large, the shaking generator generates electricity to make the alarm go off.

[0048] As Figure 1 、 Figure 2 shown, the sinking unit 2 includes a mounting base 15, a plurality of balance plates 17, two support plates 20, a roller 21, two second springs 19, and a first mounting plate 18.

[0049] The mounting base 15 is a hollow cylinder. The upper surface of the mounting base 15 is fixedly connected with a hollow mounting cylinder 16. The hollow mounting cylinder 16 can correspond to the first magnet 11 and the first magnet 11 can be adsorbed on the hollow mounting cylinder 16. A plurality of balance plates 17 are evenly installed on the side wall of the mounting base 15.

[0050] The first mounting plate 18 is located inside the mounting base 15. The two second springs 19 are arranged parallel to each other and perpendicular to the upper surface of the first mounting plate 18. The upper ends of the two second springs 19 are respectively fixedly connected with the support plates 20. The roller 21 is rotatably installed between the two support plates 20. One end of the measuring pulling rope 3 is fixedly connected to the roller 21, and the other end is connected to the shaking generator 13. The upper end surface of the mounting base 15 is provided with a first installation channel, and the first installation channel is connected to the inside of the mounting base 15. The shaking generator 13 is located in the first installation channel in the initial state. A waterproof rubber ring is arranged in the first installation channel, and the measuring pulling rope 3 can pass through the waterproof rubber ring.

[0051] In this example, when the mounting base sinks to the bottom of the water, the first magnet can be adsorbed on the hollow mounting tube, and when the floating ball rises, the first magnet is driven to float up and separate from the hollow mounting tube; when the mounting base sinks to the bottom of the water, the balance board can reduce the impact of the water flow on the mounting base, and place the mounting base at an angle. When the mounting base sinks to the bottom of the water, the balance board can play a supporting role; when the floating ball rises, the roller rotates to lengthen the measuring rope, and when the floating ball completely rises to the water surface, the measuring rope is straightened, the roller is driven to rise, and the second spring is lengthened. At this time, the roller reverses to shorten the measuring rope, pulling the floating ball into the water to half of its volume, and the second spring returns to its initial shape and the roller returns to its initial position; the waterproof rubber ring can effectively prevent water from soaking in the mounting base.

[0052] like Figure 1 , Figure 2 and Figure 3 As shown, the sinking unit 2 further includes a first cylinder 23, a drill bit 4, a first screw rod 22, a second screw rod 3, a first gear 24, a second gear 27 and a third gear 32;

[0053] A second mounting channel is also provided at the center of the lower end surface of the mounting base 15, and a second waterproof rubber ring is also provided in the second mounting channel. The drill bit 4 is arranged in the second mounting channel through the second waterproof rubber ring and can be lifted and lowered. The drill bit 4 is conical and has a thread on the outer wall. The sharp corner of the drill bit 4 faces downward. One end of a first screw rod 22 is also fixedly connected to the upper end surface of the drill bit 4. The other end of the first screw rod 22 is fixedly connected to the telescopic end of the first cylinder 23. The first cylinder 23 is located below the first mounting plate 18. The first screw rod 22 is also meshed with a first gear 24. The first gear 24 is rotatably mounted on the second mounting rod 25. The second mounting rod 25 is fixedly connected to the mounting base 15.

[0054] A third mounting rod 26 and a fourth mounting rod 31 are also arranged in parallel at both ends of the second mounting rod 25. The third mounting rod 26 is rotatably mounted in the mounting base 15. A second gear 27 and a first sprocket 28 are fixedly connected to the third mounting rod 26. The second gear 27 and the first gear 24 are of the same size and are arranged in parallel behind the first gear 24. The first sprocket 28 is arranged behind the second gear 27. The second sprocket 29 is rotatably mounted on the roller 21 and does not contact the measuring rope 3. The first sprocket 28 and the second sprocket 29 are connected through a chain disc 50.

[0055] The upper end surface of the installation base 15 is further provided with a third installation channel, which is connected to the inside of the installation base 15. A waterproof rubber ring is arranged in the third installation channel; the fourth installation rod 31 is fixedly connected in the installation base 15, and the third gear 32 is rotatably installed on the fourth installation rod 31. The third gear 32 is the same size as the first gear 24 and is arranged parallel in front of the first gear 24. The third gear 32 meshes with the second screw rod 33. The second screw rod 33 is fixedly connected to the fifth connecting rod 34. The axis directions of the second screw rod 33 and the fifth connecting rod 34 are the same. One end of the fifth connecting rod 34 is rotatably installed in the installation base 15, and the other end extends out of the installation base 15 through the waterproof rubber ring in the third installation channel. Threads are provided on the side wall of a section of the fifth connecting rod 34 located in the third installation channel. The sixth lifting rod 35 is sleeved on the threaded section of the fifth connecting rod 34. The sixth lifting rod 35 is threadedly connected to the fifth connecting rod 34. The sixth lifting rod can also be lifted through the waterproof rubber ring. A sliding block 36 is fixedly connected to the outer wall of the sixth lifting rod 35. A seventh installation block 37 is also fixedly connected to one side of the sixth lifting rod 35. A first sliding groove 38 is provided on one side of the seventh installation block 37 close to the sixth lifting rod 35. The length direction of the first sliding groove 38 is the same as the axis direction of the sixth lifting rod 35. The sliding block 36 is slidably arranged in the first sliding groove 38; a pressing block 39 is also fixedly connected to the upper end surface of the sixth lifting rod 35. The pressing block 39 can cooperate with the rotating plate 8 to press the floating ball 6.

[0056] In this instance, after the installation base sinks to the bottom of the water, the first gear rotates to drive the first screw rod to rotate, and the drill bit rotates accordingly. Subsequently, the first cylinder is activated, and the drill bit drills into the bottom of the water and is fixed. Then, the first gear stops drilling, and the drill bit stops rotating. The installation base is fixed to the bottom of the water. When the measurement is completed and the device needs to be retrieved, the first gear rotates in reverse, driving the drill bit to rotate in reverse. The first cylinder is activated to bring the drill bit out of the bottom of the water and back into the installation base. When the installation base sinks to the bottom of the water and the floating ball reacts and rises, the second gear rotates, driving the first sprocket to rotate. The first sprocket drives the second sprocket to rotate through the chain disc. The second sprocket drives the roller to rotate to let out the measuring drawstring, and the floating ball can rise. When the floating ball rises to drive the roller to rise, the second gear rotates in reverse, driving the first sprocket and the second sprocket to rotate in reverse. The roller is driven to rotate in reverse, and the measuring drawstring is shortened until the roller returns to the initial position. Then, the second gear stops rotating, and the first sprocket and the second sprocket stop rotating and restrict the rotation of the roller. When the installation base sinks to the bottom of the water and the drill bit drills into the bottom of the water, the third gear rotates, driving the second screw rod to rotate. The fifth connecting rod inside the second screw rod rotates accordingly. The sixth lifting rod threadedly connected to the fifth connecting rod can rise under the drive of the fifth connecting rod. The pressing plate on the sixth connecting rod rises accordingly and cooperates with the rotation to squeeze the floating ball. The reaction box inside the floating ball is squeezed and broken to react with the reaction water inside the floating ball to generate gas, and the floating ball begins to expand. Then, the third gear rotates in reverse to drive the second screw rod to rotate in reverse. The fifth connecting rod rotates in reverse to drive the sixth lifting rod to descend, and the pressing plate descends accordingly.

[0057] As Figure 1 , Figure 2 shown, the sinking unit 2 further includes a fourth gear 40. The fourth gear 40 is fixedly connected to the output end of the first motor 41. The first motor 41 is installed on the third screw rod 42 through a bearing. One end of each of the two opposite side walls at the lower end of the first motor 41 is fixedly connected to one end of a seventh slide bar. Two corresponding second chutes are provided in the installation base 15. The other end of each seventh slide bar is slidably installed in the second chute. The length direction of the second chute is consistent with the axial line direction of the fourth installation rod 31. The axial line direction of the third screw rod 42 is consistent with the length direction of the second chute, and the third screw rod 42 is located above the first motor 41. One end of the third screw rod 42 is rotatably installed in the installation base 15, and the other end is fixedly connected to the output end of the second motor 45. The second motor 45 is fixedly connected in the installation base 15. The first motor 41 can reciprocate in the installation base 15 through the third screw rod 42. The fourth gear 40 can mesh with the third gear 32, and can also mesh with the second gear 27 and the first gear 24.

[0058] In this example, when the installation base reaches the bottom of the water and the drill bit starts to work, the second motor starts to drive the third screw to rotate. The second motor moves on the third screw to above the first gear to engage the fourth gear with the first gear. Subsequently, the first motor starts to drive the first gear to rotate, so that the drill bit follows to drill. When the installation base sinks to the bottom of the water and the floating ball rises due to a reaction inside, the second motor moves on the third screw to above the second gear to engage the fourth gear with the second gear. Subsequently, the first motor starts to drive the second gear to rotate, thus driving the roller to rotate. When the installation base sinks to the bottom of the water and the drill bit drills into the bottom of the water, the second motor moves on the third screw to above the third gear to engage the fourth gear with the third gear. Subsequently, the first motor starts to drive the third gear to rotate, thus driving the lifting and lowering of the pressing plate.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent replacements can still be made to the specific embodiments of the present invention. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A coastal tide level forecasting device, characterized in that The device includes a floating unit and a sinking unit. The floating unit can be connected to the sinking unit and sink to the bottom of the water following the sinking unit; then, it detaches from the sinking unit by adjusting the buoyancy of the floating unit and floats to the water surface. The floating unit and the sinking unit are connected by a measuring rope, and the water depth is measured by the length of the measuring rope pulled out. The floating unit includes an eighth mounting plate and a floating ball. A through hole for accommodating the floating ball is provided in the center of the eighth mounting plate. The floating ball is installed in the through hole by a traction rope, and the floating ball is fixedly connected to one end of the measuring rope. A fixing plate and a rotating plate are also installed on the upper surface of the eighth mounting plate. The fixing plate is hinged to the rotating plate by a first torsion spring. In the natural state of the first torsion spring, the rotating plate is located above the floating ball. A pressing plate is installed below the floating ball in a liftable manner. The pressing plate is lifted and lowered under the drive of a drive structure to cooperate with the rotating plate to press the floating ball. The floating ball stores reaction water and a reaction box. The reaction box is broken under the extrusion of the pressing plate and the rotating plate, reacts with the reaction water to generate gas, and the floating ball expands to make the rotating plate flip above the fixing plate.

2. The coastal tide level forecasting device according to claim 1, characterized in that The gravity of the sinking unit is less than the maximum buoyancy provided by the floating unit, and the sinking unit can be fixedly connected to or detached from the bottom of the water.

3. The coastal tide level forecasting device according to claim 1, characterized in that, The floating unit and the sinking unit can be magnetically connected; the downward force on the floating unit generated by the magnetic force is less than the upward buoyancy provided by the maximum buoyancy of the floating unit.

4. A coastal tide level forecasting device according to claim 1, characterized in that, The measuring rope can pull down the floating unit floating on the water surface to straighten the measuring rope.

5. The coastal tide level forecasting device according to claim 4, characterized in that, A shaking power generator is installed on the measuring rope. The current output end of the shaking power generator is connected to the current input end of the alarm. The alarm is installed on the floating unit and monitors the tide size and gives an alarm in the state where the measuring rope is straightened.

6. The coastal tide level forecasting device according to claim 1, characterized in that One end of the measuring rope is fixedly connected to a roller, and the other end is fixedly connected to the floating unit. The roller is connected to the drive structure through a transmission structure; the roller is installed in the sinking unit in a liftable manner through a second spring.

7. The coastal tide level forecasting device according to claim 2, characterized in that, A drill bit is also installed in the sinking unit. The drill bit is conical and has threads on its outer wall. The tip of the drill bit can extend downward from the bottom of the sinking unit, and the drill bit is driven by a drive structure.

8. The coastal tide level forecasting device according to claim 3, characterized in that, A first magnet is also fixedly connected to the lower surface of the eighth mounting plate. The upper end surface of the sinking unit includes a hollow mounting cylinder, and the first magnet can be adsorbed on the outer wall of the hollow mounting cylinder.

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