CN110371260B - Lifting device of seawater tower and control method thereof - Google Patents

Abstract

The invention discloses a lifting device of a seawater tower and a control method thereof, belonging to the field of ocean engineering equipment. The lifting device comprises a driving component and two groups of lifting components; each group of lifting components comprises a rack, a climbing gear, a clutch and a transmission gear; in each group of lifting assemblies, a transmission gear is in transmission connection with a climbing gear through a clutch, and the climbing gear is meshed with a rack; the racks in the two groups of lifting assemblies are respectively arranged on two chord tubes in the three chord tubes, and the extending direction of the racks is the same as that of the chord tubes; the driving assembly comprises a driving unit and a driven gear; the driving unit is coaxially connected with the driven gear and used for driving the driven gear to do reciprocating swing motion, and the driven gear is respectively meshed with the transmission gears in the two groups of lifting assemblies. The invention can effectively reduce the implementation cost.

Description

Lifting device of seawater tower and control method thereof

Technical Field

The invention relates to the field of ocean engineering equipment, in particular to a lifting device of a seawater tower and a control method thereof.

Background

The seawater lifting device is important equipment of a marine platform and is used for ensuring seawater supply of a cooling circulation system, a pile punching system, a domestic sewage system and the like of the marine platform. The seawater tower is an important component of a seawater lifting system and is mainly used for the retraction and release work of a seawater pump. When the seawater lifting device is required to supply seawater, the lifting mechanism drives the seawater tower to descend until the seawater pump is contacted with the seawater, so that the seawater pump can pump the seawater to the marine platform.

The lifting device of the existing seawater tower comprises a rack, at least two lifting gears and motors which are in one-to-one correspondence with the lifting gears. The rack is arranged on the seawater tower along the length direction of the seawater tower, at least two lifting gears are respectively meshed with the two sides of the rack, each gear is respectively in transmission connection with a corresponding motor, and all the motors are installed on the marine platform. The driving motor rotates to drive the lifting gear to rotate, and the lifting gear moves along the length direction of the rack, so that the marine platform and the seawater tower move relatively to each other, and the seawater tower is lifted.

In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:

in order to realize the balance lifting of the seawater tower, the lifting device needs at least two lifting gears to move along the length direction of the rack at the same time. And each lifting gear needs to be independently provided with a motor for driving, so that the lifting device needs to be provided with at least two motors for driving, and the realization cost is higher.

Disclosure of Invention

The embodiment of the invention provides a lifting device of a seawater tower and a control method thereof, which can reduce the number of driving devices and reduce the implementation cost of the lifting device. The technical scheme is as follows:

in a first aspect, an embodiment of the present invention provides a lifting device for a seawater tower, where the seawater tower includes a truss structure and three chord pipes arranged in parallel, and the three chord pipes are connected by the truss structure; the lifting device comprises a driving assembly and two groups of lifting assemblies; each group of lifting components comprises a rack, a climbing gear, a clutch and a transmission gear; in each group of lifting assemblies, the transmission gear is in transmission connection with the climbing gear through the clutch, and the climbing gear is meshed with the rack; the racks in the two groups of lifting assemblies are respectively arranged on two chord tubes in the three chord tubes, and the extending direction of the racks is the same as that of the chord tubes; the driving assembly comprises a driving unit and a driven gear; the driving unit is coaxially connected with the driven gear and used for driving the driven gear to do reciprocating swing motion, and the driven gear is respectively meshed with the transmission gears in the two groups of lifting assemblies.

Optionally, the driving unit comprises a driving gear, a driving rack and a telescopic component; the driving gear with driven gear coaxial coupling, the drive rack with the driving gear meshing, flexible part has stiff end and flexible end, the stiff end is used for fixing on marine platform, flexible end with the one end of drive rack is connected, flexible end is for the stiff end is straight line repetitive motion.

Further, the fixed end, the telescopic end and the driving rack are sequentially arranged on the same straight line.

Furthermore, the telescopic part is a hydraulic oil cylinder or an air cylinder.

Furthermore, the driving unit further comprises a guide component, and the guide component, the driving rack and the telescopic component are sequentially arranged on the same straight line.

Optionally, in each group of the lifting assemblies, the transmission gear is coaxially arranged with the climbing gear, and the clutch is a dog clutch or a friction clutch.

Optionally, each group of the lifting assemblies further comprises a transmission bracket and a climbing bracket, the transmission bracket and the climbing bracket are used for being fixed on the maritime work platform respectively, the transmission gear is installed on the transmission bracket through a bearing, and the climbing gear is installed on the climbing bracket through a bearing.

Optionally, the driving gear is a cam, and the edge of the cam is symmetrically provided with meshing teeth.

In a second aspect, an embodiment of the present invention provides a control method for a lifting device of a seawater tower provided in the first aspect, where the control method includes:

step S11, the driving unit drives the driven gear to rotate along a first rotating direction, and controls the clutch in the first group of lifting assembly to be in a joint state, the clutch in the second group of lifting assembly is in a separation state, and the driven gear drives the climbing gear in the first group of lifting assembly to rotate through the driving gear and the transmission gear in the first group of lifting assembly;

step S12, the driving unit drives the driven gear to rotate along a second rotation direction, and controls the clutch in the first group of lifting assembly to be in a separation state, the clutch in the second group of lifting assembly is in a joint state, the driven gear drives the climbing gear in the second group of lifting assembly to rotate through the driving gear and the transmission gear in the second group of lifting assembly, and the second rotation direction is opposite to the first rotation direction;

and step S13, alternately executing step S11 and step S12 to realize the rise of the seawater tower.

In a third aspect, an embodiment of the present invention provides a control method for a lifting device of a seawater tower provided in the first aspect, where the control method includes:

step S21, the driving unit drives the driven gear to rotate along a first rotating direction, and controls the clutch in the first group of lifting assembly to be in a separation state, the clutch in the second group of lifting assembly to be in a joint state, and the driven gear drives the climbing gear in the second group of lifting assembly to rotate through the driving gear and the transmission gear in the second group of lifting assembly;

step S22, the driving unit drives the driven gear to rotate along a second rotation direction, and controls the clutch in the first group of lifting assembly to be in an engaged state, the clutch in the second group of lifting assembly is in a disengaged state, the driven gear drives the climbing gear in the first group of lifting assembly to rotate through the driving gear and the transmission gear in the first group of lifting assembly, and the second rotation direction is opposite to the first rotation direction;

and step S23, alternately executing step S21 and step S22 to realize the descending of the seawater tower.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

the driving unit drives the driven gear to do reciprocating swing motion, the driven gear can simultaneously drive the transmission gears in the two groups of lifting assemblies to rotate in the same direction in the motion process, the clutches in the two groups of lifting assemblies are utilized to connect or separate the transmission gears and the climbing gears, so that the climbing gears in the two groups of lifting assemblies, the rotating directions of which are the same as the lifting directions of the seawater tower, are connected with the transmission gears in the same group of lifting assemblies, the climbing gears in the rotating directions of which are opposite to the lifting directions of the seawater tower are separated from the transmission gears in the same group of lifting assemblies, and the seawater tower is lifted or descended. And the whole lifting device only needs to be provided with one driving device, so that the realization cost can be effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lifting device of a seawater tower according to an embodiment of the present invention;

fig. 2 is a top view of a seawater tower lifting device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a driving assembly provided in an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a lift assembly provided in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a clutch provided in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a driving assembly provided in an embodiment of the present invention;

fig. 7 is a flowchart of a method for controlling a lifting device of a seawater tower according to an embodiment of the present invention;

fig. 8 is a flowchart of a method for controlling a lifting device of a seawater tower according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiment of the invention provides a lifting device of a seawater tower. Fig. 1 is a schematic structural diagram of a lifting device of a seawater tower according to an embodiment of the present invention, and fig. 2 is a top view of the lifting device of the seawater tower according to the embodiment of the present invention. Referring to fig. 1 and 2, the seawater tower comprises a truss structure 11 and three chord pipes 12 arranged in parallel, wherein the three chord pipes 12 are connected with each other through the truss structure 11. The lifting device comprises a drive assembly 20 and two sets of lifting assemblies 30. Each set of lifting assemblies 30 includes a rack 31, a climbing gear 32, a clutch 33, and a drive gear 34. In each set of lifting assemblies 30, the transmission gear 34 is in transmission connection with the climbing gear 32 through the clutch 33, and the climbing gear 32 is meshed with the rack 31. The racks 31 of the two sets of lifting assemblies 30 are respectively arranged on two chord tubes 12 of the three chord tubes 12, and the extending direction of the racks 31 is the same as that of the chord tubes 12. The driving assembly 20 includes a driving unit 21 and a driven gear 22. The driving unit 21 is coaxially connected with the driven gear 22 and is used for driving the driven gear 22 to do reciprocating swing motion, and the driven gear 22 is respectively meshed with the transmission gears 34 in the two groups of lifting assemblies 30.

In the embodiment of the invention, the driven gear is driven to do reciprocating swing motion by the driving unit, the driven gear can simultaneously drive the transmission gears in the two groups of lifting assemblies to rotate in the same direction in the motion process, and the clutch in the two groups of lifting assemblies is utilized to connect or separate the transmission gears and the climbing gears, so that the climbing gears in the two groups of lifting assemblies, which have the same rotation direction as the lifting direction of the seawater tower, are connected with the transmission gears in the same group of lifting assemblies, and the climbing gears in the rotation direction opposite to the lifting direction of the seawater tower are separated from the transmission gears in the same group of lifting assemblies, thereby realizing the lifting or descending of the seawater tower. And the whole lifting device only needs to be provided with one driving device, so that the realization cost can be effectively reduced.

Alternatively, the diameter of the driven gear 22 may be more than 2 times, such as 3 times, the diameter of the drive gear 34. And the distribution position of the meshing teeth on the driven gear is controlled by matching with the stroke of the reciprocating swing motion, so that the processing cost of the meshing teeth is reduced.

Alternatively, the corresponding central angle of the locus of the reciprocating swinging motion on the end surface of the driven gear 22 may be smaller than the meshing angle of the driving gear 34 and the driven gear 22 in the two sets of lifting assemblies 30. Through the motion stroke of injecing driven gear, can guarantee that drive gear and driven gear in two sets of lifting unit are effective meshing.

Furthermore, the corresponding central angle of the reciprocating swing track on the end face of the driven gear 22 can be 30-40 degrees, so that the number of meshing teeth on the driven gear can be reduced, and the processing cost is reduced.

Fig. 3 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention. Referring to fig. 3, 1 and 2, the driving unit 21 may alternatively include a pinion gear 211, a driving rack 212 and a telescopic member 213. The driving gear 211 is coaxially connected with the driven gear 22, the driving rack 212 is engaged with the driving gear 211, the telescopic member 213 has a fixed end 213a and a telescopic end 213b, the fixed end 213a is used for being fixed on the marine platform, the telescopic end 213b is connected with one end of the driving rack 212, and the telescopic end 213b makes a linear reciprocating motion relative to the fixed end 213 a. The gear rack is used as the meshing transmission mechanism, the telescopic component is used as the driving mechanism, and the problems of discontinuous action and low lifting speed of the hydraulic bolt type lifting mechanism can be solved.

Further, as shown in fig. 1, 2 and 3, the fixed end 213a, the telescopic end 213b and the driving rack 212 may be sequentially disposed on the same straight line, and the linear repetitive motion of the telescopic member 213 may be effectively converted into the motion of the rack 212.

Further, the telescopic member 213 may be a hydraulic cylinder or an air cylinder, preferably a hydraulic cylinder, which is stable and durable in power and low in cost.

Further, as shown in fig. 1, 2 and 3, the driving unit 21 may further include a guide member 214, and the guide member 214, the driving rack 212 and the telescopic member 213 are sequentially disposed on the same straight line. The rack 212 is guided by the guide member 214 to move, and the rack 212 is prevented from deviating from the original direction.

In practical applications, the guiding member 214 may be a cylindrical structure. In addition, grease may be provided within the cylindrical structure to reduce sliding resistance of the rack 212.

Fig. 4 is a schematic structural diagram of a lifting assembly according to an embodiment of the present invention. Referring to fig. 4, optionally, in each set of lifting assemblies 30, a transmission gear 34 is disposed coaxially with the climbing gear 32, and the clutch 33 may be a dog clutch or a friction clutch, preferably a dog clutch, which is effective to transmit power.

Fig. 5 is a schematic structural diagram of a clutch according to an embodiment of the present invention. Referring to fig. 5, further, the clutch 33 may include a housing 331, and a spring 332, a chuck 333 and a fixed disk 334 which are disposed in the housing 331, wherein the chuck 333, the fixed disk 334 and the climbing gear 32 are sequentially sleeved on the same rotating shaft, the spring 332 is interposed between the chuck 333 and the fixed disk 334, and a clamping groove 333a for clamping the rotating shaft of the transmission gear 34 is disposed on an end surface of the chuck 333 facing the transmission gear 34.

In practical application, as shown in fig. 5, when hydraulic oil is injected into the housing 331, an acting area of the hydraulic oil on a first end face of the chuck 333 where the clamping groove 333a is provided is smaller than an acting area of the hydraulic oil on a second end face opposite to the first end face, so that the chuck 333 moves toward the transmission gear 34 against an acting force of the spring 332 under the action of the hydraulic oil, the clamping groove 333a clamps the transmission gear 34, and the climbing gear 32 is engaged with the transmission gear 34 through the chuck 333. When the housing 331 is empty of hydraulic oil, the chuck 333 is moved away from the transmission gear 34 by the spring 332, and the climbing gear 32 is separated from the transmission gear 34.

Further, the rotation shaft of the transmission gear 34 and the rotation shaft of the climbing gear 32 may be mounted on the housing 331 through bearings. In addition, the housing 331 may be provided with a seal structure such as a shaft end seal, a circlip, or the like.

Optionally, as shown in fig. 4, each set of lifting assemblies 30 further includes a transmission bracket 35 and a climbing bracket 36, the transmission bracket 35 and the climbing bracket 36 are respectively fixed on the maritime work platform, the transmission gear 34 is mounted on the transmission bracket 35 through a bearing, and the climbing gear 32 is mounted on the climbing bracket 36 through a bearing, which facilitates stable operation of the lifting device.

Fig. 6 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention. Referring to fig. 6, the driving assembly 20 may further include a driving bracket 23, the driving bracket 23 is fixed on the marine platform, and the driven gear 22 is mounted on the driving bracket 23 through a bearing, which facilitates stable operation of the lifting device.

In practical applications, the driving bracket 23, the transmission bracket 35 and the climbing bracket 36 may be fixed on the marine platform by bolts.

Alternatively, the driving gear 22 may be a cam, and the edge of the cam is symmetrically provided with meshing teeth to facilitate the reciprocating swing motion of the driving gear.

The embodiment of the invention provides a control method of a lifting device of a seawater tower, which is suitable for controlling the lifting device of the seawater tower shown in fig. 1 and 2. Fig. 7 is a flowchart of a method for controlling a lifting device of a seawater tower according to an embodiment of the present invention. Referring to fig. 7, the control method includes:

and step S11, the driving unit drives the driven gear to rotate along a first rotating direction, and controls the clutch in the first group of lifting assembly to be in an engaged state, the clutch in the second group of lifting assembly to be in a disengaged state, and the driven gear drives the climbing gear in the first group of lifting assembly to rotate through the driving gear and the transmission gear in the first group of lifting assembly.

Taking fig. 3 as an example, the distance between the telescopic end 213b and the fixed end 213a is increased, the rack 212 is driven to move leftward, the driving gear 212 is driven to rotate clockwise, the driven gear 22 is driven to rotate clockwise, and finally the transmission gears 34 in the left and right sets of lifting assemblies are driven to rotate counterclockwise. As shown in fig. 2, the clutch 30 in the left lifting assembly is in an engaged state, and the clutch 30 in the right lifting assembly is in a disengaged state, so that the climbing gear 32 in the left lifting assembly is driven to rotate counterclockwise, the rack 31 engaged with the climbing gear 32 moves upward, and the seawater tower ascends. In addition, during the process of the seawater tower ascending, the climbing gear 32 in the right lifting assembly is driven to rotate clockwise.

And step S12, the driving unit drives the driven gear to rotate along a second rotation direction, and controls the clutch in the first group of lifting assembly to be in a separation state, the clutch in the second group of lifting assembly is in a joint state, the driven gear drives the climbing gear in the second group of lifting assembly to rotate through the driving gear and the transmission gear in the second group of lifting assembly, and the second rotation direction is opposite to the first rotation direction.

Taking fig. 3 as an example, the distance between the telescopic end 213b and the fixed end 213a is reduced, the rack 212 is driven to move rightward, the driving gear 212 is driven to rotate counterclockwise, the driven gear 22 is driven to rotate counterclockwise, and finally the transmission gears 34 in the left and right sets of lifting assemblies are driven to rotate clockwise. As shown in fig. 2, the clutch 30 in the left lifting assembly is in a disengaged state, and the clutch 30 in the right lifting assembly is in an engaged state, so that the climbing gear 32 in the right lifting assembly is driven to rotate along the pointer, the rack 31 engaged with the climbing gear 32 moves upward, and the seawater tower ascends. In addition, during the process of the seawater tower ascending, the climbing gear 32 in the left lifting assembly is driven to rotate along the counterclockwise direction.

And step S13, alternately executing step S11 and step S12 to realize the rise of the seawater tower.

The embodiment of the invention provides a control method of a lifting device of a seawater tower, which is suitable for controlling the lifting device of the seawater tower shown in fig. 1 and 2. Fig. 8 is a flowchart of a method for controlling a lifting device of a seawater tower according to an embodiment of the present invention. Referring to fig. 8, the control method includes:

and step S21, the driving unit drives the driven gear to rotate along the first rotating direction, and controls the clutch in the first group of lifting assembly to be in a separation state, the clutch in the second group of lifting assembly to be in a joint state, and the driven gear drives the climbing gear in the second group of lifting assembly to rotate through the driving gear and the transmission gear in the second group of lifting assembly.

Taking fig. 3 as an example, the distance between the telescopic end 213b and the fixed end 213a is increased, the rack 212 is driven to move leftward, the driving gear 212 is driven to rotate clockwise, the driven gear 22 is driven to rotate clockwise, and finally the transmission gears 34 in the left and right sets of lifting assemblies are driven to rotate counterclockwise. As shown in fig. 2, the clutch 30 in the left lifting assembly is in a disengaged state, and the clutch 30 in the right lifting assembly is in an engaged state, so that the climbing gear 32 in the right lifting assembly is driven to rotate counterclockwise, the rack 31 engaged with the climbing gear 32 moves downward, and the seawater tower descends. In addition, during the descending process of the seawater tower, the climbing gear 32 in the left lifting assembly is driven to rotate clockwise.

And step S22, the driving unit drives the driven gear to rotate along a second rotation direction, and controls the clutch in the first group of lifting assembly to be in an engaged state, the clutch in the second group of lifting assembly to be in a disengaged state, the driven gear drives the climbing gear in the first group of lifting assembly to rotate through the driving gear and the transmission gear in the first group of lifting assembly, and the second rotation direction is opposite to the first rotation direction.

Taking fig. 3 as an example, the distance between the telescopic end 213b and the fixed end 213a is reduced, the rack 212 is driven to move rightward, the driving gear 212 is driven to rotate counterclockwise, the driven gear 22 is driven to rotate counterclockwise, and finally the transmission gears 34 in the left and right sets of lifting assemblies are driven to rotate clockwise. As shown in fig. 2, the clutch 30 in the left lifting assembly is in an engaged state, and the clutch 30 in the right lifting assembly is in a disengaged state, so that the climbing gear 32 in the left lifting assembly is driven to rotate along the pointer, the rack 31 engaged with the climbing gear 32 moves downwards, and the seawater tower descends. In addition, during the process of the seawater tower descending, the climbing gear 32 in the right lifting assembly is driven to rotate along the counterclockwise direction.

And step S23, alternately executing step S21 and step S22 to realize the descending of the seawater tower.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A lifting device of a seawater tower is characterized in that the seawater tower comprises a truss structure (11) and three chord pipes (12) which are arranged in parallel, wherein the three chord pipes (12) are connected through the truss structure (11); the lifting device comprises a driving component (20) and two groups of lifting components (30); each group of lifting assemblies (30) comprises a rack (31), a climbing gear (32), a clutch (33) and a transmission gear (34); in each group of the lifting assemblies (30), the transmission gear (34) is in coaxial transmission connection with the climbing gear (32) through the clutch (33), and the climbing gear (32) is meshed with the rack (31); the racks (31) in the two groups of lifting assemblies (30) are respectively arranged on two chord tubes (12) in three chord tubes (12), and the extending direction of the racks (31) is the same as that of the chord tubes (12); the drive assembly (20) comprises a drive unit (21) and a driven gear (22); the driving unit (21) is coaxially connected with the driven gear (22) and used for driving the driven gear (22) to do reciprocating swing motion, and the driven gear (22) is meshed with the transmission gears (34) in the two groups of lifting assemblies (30) respectively.

2. Lifting device according to claim 1, characterized in that the drive unit (21) comprises a pinion gear (211), a drive rack (212) and a telescopic part (213); driving gear (211) with driven gear (22) coaxial coupling, drive rack (212) with driving gear (211) meshing, flexible part (213) have stiff end (213a) and flexible end (213b), stiff end (213a) are used for fixing on marine platform, flexible end (213b) with the one end of drive rack (212) is connected, flexible end (213b) for stiff end (213a) do straight line repetitive motion.

3. The lifting device according to claim 2, characterized in that the fixed end (213a), the telescopic end (213b) and the driving rack (212) are arranged in sequence on the same straight line.

4. A lifting device as claimed in claim 3, characterised in that the telescopic member (213) is a hydraulic or pneumatic cylinder.

5. Lifting device according to claim 2 or 3, characterized in that said drive unit (21) further comprises a guide member (214), said drive rack (212) and said telescopic member (213) being arranged in sequence on the same straight line.

6. Lifting device according to any of claims 1 to 4, characterized in that in each set of lifting assemblies (30) the transmission gear (34) is arranged coaxially with the climbing gear (32), and the clutch (33) is a dog clutch or a friction clutch.

7. The lifting device according to any one of claims 1 to 4, wherein each set of lifting assemblies (30) further comprises a transmission bracket (35) and a climbing bracket (36), the transmission bracket (35) and the climbing bracket (36) are respectively fixed on a maritime work platform, the transmission gear (34) is mounted on the transmission bracket (35) through a bearing, and the climbing gear (32) is mounted on the climbing bracket (36) through a bearing.

8. A lifting device as claimed in any one of claims 1 to 4, characterized in that the drive gear (22) is a cam, the edge of which is symmetrically provided with meshing teeth.

9. A method of controlling a lifting device of a seawater tower according to any one of claims 1 to 8, comprising:

step S11, the driving unit drives the driven gear to rotate along a first rotating direction, and controls the clutch in the first group of lifting assembly to be in a joint state, the clutch in the second group of lifting assembly is in a separation state, and the driven gear drives the climbing gear in the first group of lifting assembly to rotate through the driving gear and the transmission gear in the first group of lifting assembly;

step S12, the driving unit drives the driven gear to rotate along a second rotation direction, and controls the clutch in the first group of lifting assembly to be in a separation state, the clutch in the second group of lifting assembly is in a joint state, the driven gear drives the climbing gear in the second group of lifting assembly to rotate through the driving gear and the transmission gear in the second group of lifting assembly, and the second rotation direction is opposite to the first rotation direction;

and step S13, alternately executing step S11 and step S12 to realize the rise of the seawater tower.

10. A method of controlling a lifting device of a seawater tower according to any one of claims 1 to 8, comprising:

step S21, the driving unit drives the driven gear to rotate along a first rotating direction, and controls the clutch in the first group of lifting assembly to be in a separation state, the clutch in the second group of lifting assembly to be in a joint state, and the driven gear drives the climbing gear in the second group of lifting assembly to rotate through the driving gear and the transmission gear in the second group of lifting assembly;

step S22, the driving unit drives the driven gear to rotate along a second rotation direction, and controls the clutch in the first group of lifting assembly to be in an engaged state, the clutch in the second group of lifting assembly is in a disengaged state, the driven gear drives the climbing gear in the first group of lifting assembly to rotate through the driving gear and the transmission gear in the first group of lifting assembly, and the second rotation direction is opposite to the first rotation direction;

and step S23, alternately executing step S21 and step S22 to realize the descending of the seawater tower.

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