CN110374394B

CN110374394B - Lifting device of seawater tower and control method thereof

Info

Publication number: CN110374394B
Application number: CN201910472885.8A
Authority: CN
Inventors: 王鑫磊; 彭莲; 田崇兴; 龚云
Original assignee: Wuhan Marine Machinery Plant Co Ltd
Current assignee: Wuhan Marine Machinery Plant Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-12-15
Anticipated expiration: 2039-05-31
Also published as: CN110374394A

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 telescopic component and a driving gear; the driving gear is respectively meshed with the transmission gears in the two groups of lifting components; the telescopic component is provided with a fixed end and a telescopic end, the fixed end is used for being fixed on the marine platform, the telescopic end is hinged to a non-circle center area of the end face of the driving gear, and the telescopic end makes linear reciprocating motion relative to the fixed end. 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 telescopic component and a driving gear; the driving gears are respectively meshed with the transmission gears in the two groups of lifting assemblies; the flexible part has stiff end and flexible end, the stiff end is used for fixing on marine platform, flexible end is articulated the non-centre of a circle region of drive gear's terminal surface, flexible end for the stiff end is made straight line repetitive motion.

Optionally, the distance between the telescopic end and the center of the driving gear is greater than 1/2 times the diameter of the driving gear.

Further, the diameter of the driving gear is more than 2 times of the diameter of the transmission gear.

Optionally, a central angle of a track of the linear repetitive motion on the end face of the driving gear is smaller than a meshing angle between the transmission gear of the two sets of lifting assemblies and the driving gear.

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.

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

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, increasing the distance between the telescopic end and the fixed end, and controlling the clutch in the first group of lifting assembly to be in a joint state, the clutch in the second group of lifting assembly to be in a separation state, the telescopic assembly driving 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, reducing the distance between the telescopic end and the fixed end, and controlling 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, the telescopic assembly driving 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 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, increasing the distance between the telescopic end and the fixed end, and controlling 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, the telescopic assembly driving 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, reducing the distance between the telescopic end and the fixed end, and controlling the clutch in the first group of lifting assembly to be in a joint state, the clutch in the second group of lifting assembly to be in a separation state, the telescopic assembly driving 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 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 linear reciprocating motion of the telescopic part drives the reciprocating swing motion of the driving gear, the driving gear can simultaneously drive the transmission gears in the two sets of lifting assemblies to rotate in the same direction in the motion process of the driving gear, and the clutches in the two sets of lifting assemblies are simultaneously utilized to connect or separate the transmission gears and the climbing gears, so that the climbing gears in the two sets 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 set of lifting assemblies, the climbing gears in the rotating directions which are opposite to the lifting directions of the seawater tower are separated from the transmission gears in the same set of lifting assemblies, and the seawater tower rises or falls. 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.

Fig. 3 is a schematic structural diagram of a driving assembly according to an embodiment of the present invention. Referring to fig. 3, the driving assembly 20 includes a telescopic member 21 and a driving gear 22. The drive gears 22 are respectively engaged with the drive gears 34 in the two sets of lift assemblies 30. The telescopic part 21 is provided with a fixed end 21a and a telescopic end 21b, the fixed end 21a is used for being fixed on the maritime work platform, the telescopic end 21b is hinged on the non-circle center area of the end face of the driving gear 22, and the telescopic end 21b makes linear reciprocating motion relative to the fixed end 21 a.

According to the embodiment of the invention, the reciprocating swing motion of the driving gear is driven by the linear reciprocating motion of the telescopic component, the driving gear can simultaneously drive the transmission gears in the two groups of lifting components to rotate in the same direction in the motion process, and meanwhile, the transmission gears and the climbing gears are connected or separated by using the clutches in the two groups of lifting components, so that the climbing gears in the two groups of lifting components, 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 components, 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 components, thereby realizing the lifting or descending of the. And the whole lifting device only needs to be provided with one driving device, so that the realization cost can be effectively reduced.

In addition, the gear rack is used as the meshing transmission mechanism, and the telescopic component is used as the driving mechanism, so that the problems of discontinuous action and low lifting speed of the hydraulic bolt type lifting mechanism can be solved. And the eccentric driving mode can effectively improve the driving torque and increase the load of the seawater lifting system compared with the central driving mode.

Alternatively, as shown in fig. 3, the distance d between the telescopic end 21b and the center of the drive gear 22 may be greater than 1/2 of the diameter of the drive gear 22, such as 2/3. On one hand, the linear repeated motion of the telescopic component can be effectively converted into the reciprocating swing motion of the driving gear, and on the other hand, the stroke of the reciprocating swing motion can be reasonably controlled.

Further, the diameter of the drive gear 22 may be more than 2 times, such as 3 times, the diameter of the transmission gear 34. And the distribution position of the meshing teeth on the driving 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 locus of the linear reciprocating motion may have a central angle on the end face of the drive gear 22 that is smaller than the meshing angle of the drive gears 34 in the two sets of lifting assemblies 30 with the drive gear 22. By limiting the movement stroke of the telescopic component, the transmission gears in the two groups of lifting assemblies can be guaranteed to be effectively meshed with the driving gear.

Furthermore, the corresponding central angle of the linear repeated motion track on the end surface of the driving gear can be 30-40 degrees, so that the number of meshing teeth on the driving gear can be reduced, and the processing cost is reduced.

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 driving 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.

Alternatively, the telescopic member 21 may be a hydraulic cylinder or an air cylinder, preferably a hydraulic cylinder, which is stable and durable in power and low in cost.

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, increasing the distance between the telescopic end and the fixed end, controlling the clutch in the first group of lifting assembly to be in a joint state, controlling the clutch in the second group of lifting assembly to be in a separation state, and driving the climbing gear in the first group of lifting assembly to rotate by the telescopic assembly 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 21b and the fixed end 21a is increased, and the driving gear 22 rotates clockwise to drive the transmission gears 34 in the left and right sets of lifting assemblies 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, reducing the distance between the telescopic end and the fixed end, controlling the clutch in the first group of lifting assembly to be in a separation state, controlling the clutch in the second group of lifting assembly to be in a joint state, and driving the climbing gear in the second group of lifting assembly to rotate by the telescopic assembly 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 21b and the fixed end 21a is reduced, and the driving gear 22 rotates counterclockwise to drive the transmission gears 34 in the left and right sets of lifting assemblies 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 clockwise, the rack 31 engaged with the climbing gear 32 moves upwards, 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.

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, increasing the distance between the telescopic end and the fixed end, controlling the clutch in the first group of lifting assembly to be in a separation state, controlling the clutch in the second group of lifting assembly to be in a joint state, and driving the climbing gear in the second group of lifting assembly to rotate by the telescopic assembly 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 21b and the fixed end 21a is increased, and the driving gear 22 rotates clockwise to drive the transmission gears 34 in the left and right sets of lifting assemblies 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, reducing the distance between the telescopic end and the fixed end, controlling the clutch in the first group of lifting assembly to be in a joint state, controlling the clutch in the second group of lifting assembly to be in a separation state, and driving the climbing gear in the first group of lifting assembly to rotate by the telescopic assembly 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 21b and the fixed end 21a is reduced, and the driving gear 22 rotates counterclockwise to drive the transmission gears 34 in the left and right sets of lifting assemblies 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 clockwise, 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.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

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 driving assembly (20) comprises a telescopic part (21) and a driving gear (22); the driving gears (22) are respectively meshed with transmission gears (34) in the two groups of lifting assemblies (30); flexible part (21) has stiff end (21a) and flexible end (21b), stiff end (21a) are used for fixing on marine platform, flexible end (21b) articulate the non-centre of a circle region of the terminal surface of drive gear (22), flexible end (21b) for stiff end (21a) is made straight line repetitive motion.

2. Lifting device according to claim 1, characterized in that the distance d between the telescopic end (21b) and the centre of the driving gear (22) is above 1/2 of the diameter of the driving gear (22).

3. Lifting device according to claim 2, characterized in that the diameter of the driving gear (22) is more than 2 times the diameter of the transmission gear (34).

4. A lifting device as claimed in any one of claims 1 to 3, characterized in that the locus of the linear repetitive motion on the end face of the driving gear (22) corresponds to a central angle which is smaller than the meshing angle of the transmission gears (34) of the two sets of lifting assemblies (30) with the driving gear (22).

5. Lifting device according to any of claims 1 to 3, 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.

6. The lifting device according to any one of claims 1 to 3, 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.

7. Lifting device according to any of claims 1 to 3, characterised in that the driving gear (22) is a cam, the edge of which is symmetrically provided with meshing teeth.

8. A lifting device as claimed in any one of claims 1 to 3, characterised in that the telescopic member (21) is a hydraulic ram or an air cylinder.

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

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