CN113716474A - Hoisting equipment for river channel - Google Patents

Hoisting equipment for river channel Download PDF

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Publication number
CN113716474A
CN113716474A CN202111281459.XA CN202111281459A CN113716474A CN 113716474 A CN113716474 A CN 113716474A CN 202111281459 A CN202111281459 A CN 202111281459A CN 113716474 A CN113716474 A CN 113716474A
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China
Prior art keywords
connecting rod
protection device
sub
water outlet
hoisting
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CN202111281459.XA
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Chinese (zh)
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CN113716474B (en
Inventor
张烨
陈佼佼
冉冉
张烜
贾蒙
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Xinxiang University
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Xinxiang University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • B66C23/52—Floating cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/58—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes arranged to carry out a desired sequence of operations automatically, e.g. hoisting followed by luffing and slewing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B66C23/66—Outer or upper end constructions
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
    • E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
    • E02F3/92—Digging elements, e.g. suction heads
    • E02F3/9206—Digging devices using blowing effect only, like jets or propellers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
    • E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Revetment (AREA)

Abstract

The invention relates to a hoisting device for a river channel, which comprises a driver, a connecting rod, a lifting device, a rotating motor, a lifting hook and a dredging protection device. Wherein the connecting rod is a detachable limited swing connecting rod, and the dredging protection device realizes the cleaning of the sediment at the river bottom through the water suction and water spraying port. The device can be suitable for complex environments in the river channel, so that safe hoisting of river bottom articles becomes possible.

Description

Hoisting equipment for river channel
Technical Field
The invention relates to the field of cranes, in particular to the field of river channel hoisting.
Background
At present, the existing crane is usually used for hoisting on the ground, but some special occasions such as river channels exist, and the crane cannot be used for hoisting objects in the river channels. For example, to lift the debris from the sunken vessel. This is because a common crane usually uses a wire-line crane, which is very convenient on land. However, due to the complex water flow environment in the river, the steel cable will swing irregularly with the water flow, especially when encountering turbulent flow. Therefore, the underwater article to be hoisted is difficult to align, and the article can be damaged and even unhooked in the hoisting and pulling-up process, so that safety accidents are caused.
In addition, the river bottom is not as regular as the ground. For example, a river buries a large number of historical relics at the bottom of the river as it flows through a number of ancient civilization origins. Some of the river bottom articles are submerged by the river bottom sediment, and if the river bottom articles are directly hoisted by land, the articles can be damaged. In the prior art, a mode of cleaning first and then hoisting is generally adopted. However, for rivers with large silt content, when the river is hoisted after cleaning, a large amount of silt can bury objects at the bottom of the river, and the river and the silt are difficult to be well coordinated.
In addition, in the river channel, due to the existence of water and silt, higher requirements are put forward on hoisting equipment. Hoisting equipment on land is difficult to adapt to underwater environment and is very easy to damage.
Therefore, a hoisting device suitable for hoisting river bottom articles is urgently needed.
Disclosure of Invention
In order to solve the above problems and the problems mentioned in the following embodiments, the present invention proposes the following solutions:
a lifting device for a river course is provided,
comprises a driver, a connecting rod, a lifting device, a rotating motor, a lifting hook and a dredging protection device;
the driver is meshed with the connecting rod, and the connecting rod can move up and down under the driving of the driver;
the connecting rod comprises a plurality of sub-connecting rods which are connected, each sub-connecting rod comprises a convex end and a concave end, the convex end of one sub-connecting rod can be just inserted into the concave end of the adjacent sub-connecting rod, and the convex end and the concave end are in locking connection through a pin; when the plurality of sub-connecting rods are connected, the directions of the adjacent pins are mutually vertical;
the lifting device is sleeved at the lower end of the connecting rod, and a gear is arranged in the lifting device and is meshed with the meshed teeth of the connecting rod; a rotating motor and a dredging protection device are sleeved outside the lifting device; the lifting device moves up and down along the connecting rod, so as to drive the rotating motor and the dredging protection device to move up and down along the connecting rod;
the rotary motor is an annular motor, the outer side of the rotary motor is fixedly connected with the dredging protection device, and the inner side of the rotary motor is fixedly sleeved on the lifting device 3, so that the dredging protection device can rotate around the connecting rod under the driving of the rotary motor;
the dredging protection device is a barrel-shaped structure with a downward opening, the diameter of a barrel opening is smaller than that of a barrel body, namely, the trunk at the upper part of the barrel is a cylindrical part, and the tail end of the barrel is a circular table part; three openings are distributed on the outer side barrel wall of the dredging protection device: (1) the high-pressure water outlet is positioned on the outer side wall of the circular table part; (2) the turbulent flow water outlet is positioned at the tail end of the cylindrical part and on the outer side wall of the adjacent region of the cylindrical part and the circular table part; (3) a water inlet positioned on the outer side wall of the upper end of the cylindrical part;
the three ports satisfy the following conditions:
Figure DEST_PATH_IMAGE001
and, 2<P1/P2<8；4<H2/H1<16；
Wherein,
Figure 687817DEST_PATH_IMAGE002
is the pressure of the water inlet;
Figure DEST_PATH_IMAGE003
the pressure of the high-pressure water outlet is set;
Figure 542640DEST_PATH_IMAGE004
the pressure intensity of the turbulent water outlet is obtained;
Figure DEST_PATH_IMAGE005
the vertical distance between the turbulent water outlet and the high-pressure water outlet is set;
Figure 509328DEST_PATH_IMAGE006
the vertical distance between the turbulent water outlet and the turbulent water inlet is set; a is an empirical coefficient.
The three ports are sequentially arranged along the longitudinal direction of the dredging protection device to form a water flow channel; the water flow channels are uniformly arranged on the surface of the dredging protection device at intervals of 60 degrees of the cross section.
The surface of the water inlet is provided with a dense filter screen.
When in use, the sub-connecting rods are connected section by section; and after the use is finished, the sub-connecting rods are detached section by section.
Invention and technical effects
1. The concrete structural design of the dredging protection device is put forward for the first time, and by means of the water absorption and water spraying, the river substrate is protected, meanwhile, the surrounding silt can be cleaned, and the smooth hoisting of the river substrate is guaranteed.
2. The position and the water spraying pressure of the water spraying structure are optimized, so that the cleaned silt is prevented from being sucked again, and the cleaning efficiency is improved.
3. Through the design of the detachable single-plane limited swing connecting rod, the rope type crane and the upright rod type crane are both considered, the problems that the rope type crane is greatly influenced by water flow in water and is easily damaged to lose articles are avoided, and the problems that the upright rod of the upright rod type crane is large in rigidity and easily damaged by water impact are avoided.
The present invention includes, but is not limited to, the technical contents described in the embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of a lifting apparatus
FIG. 2 is a schematic view of a ship-borne lifting device
FIG. 3 is a schematic view of the structure of the dredging protection device
Fig. 4 is a schematic view of a link structure.
Detailed Description
Hoisting device structure
The hoisting device comprises a driver 1, a connecting rod 2, a lifting device 3, a rotating motor 4, a lifting hook 5 and a dredging protection device 6.
Wherein the drive 1 is mounted at a ship, a shore, a bridge or the like for providing a driving force for lifting an article. The driver 1 is engaged with the connecting rod 2, and the connecting rod 2 can move up and down under the driving of the driver 1.
The connecting rod 2 comprises a plurality of sub-connecting rods which are connected to each other by means of a swing connection, so that the connecting rod 2 can be swung in a defined manner in the water with the water flow. One end of the connecting rod 2 is meshed with the driver 1 and is used for moving up and down under the driving of the driver 1 to realize hoisting; the other end is connected with a lifting device 3. The connecting rod 2 has a surface with teeth. Typically, the tie rod 2 is of rectangular parallelepiped configuration.
The lifting device 3 is sleeved at the lower end of the connecting rod 2, and a gear is arranged in the lifting device and is meshed with the engaging teeth of the connecting rod 2. The outer side of the lifting device 3 is sleeved with a rotating motor 4 and a dredging protection device 6. The lifting device 3 can move up and down along the connecting rod 2, thereby driving the rotating motor 4 and the dredging protection device 6 to move up and down along the connecting rod 2. Typically, the elevator 3 has a rectangular parallelepiped hole on the inside and a cylindrical surface on the outside. The lifting device 3 can be internally provided with a motor for driving and driving a gear to lift; also can be externally connected with a stay wire, and the lifting is realized through external tension and dead weight.
The rotating motor 4 is an annular motor, the outer side of the rotating motor is fixedly connected with the dredging protection device 6, and the inner side of the rotating motor is sleeved on the lifting device 3 and is fixedly connected with the lifting device. Thus, the dredging protection device 6 can rotate around the connecting rod 2 by the driving of the rotating motor 4.
The lifting hook 5 is positioned at the tail end of the connecting rod 2 and used for lifting articles. Different types of hooks 5 can be selected according to the article.
Dredging protection device structure
The dredging protection device 6 is a barrel-shaped structure with a downward opening, the diameter of a barrel opening is smaller than that of a barrel body, namely, the trunk at the upper part of the barrel is a cylindrical part 6-6, and the tail end of the barrel is a circular table part 6-5. Therefore, the dredging protection device 6 can be driven by the rotating force to go deep into the river bottom sludge conveniently.
The barrel wall of the dredging protection device 6 is of a hollow structure, and a water pump and a water pipe are arranged inside the barrel wall. Due to the barrel-shaped structure, the protection of the objects can be realized, and the objects at the bottom of the river are prevented from being impacted by water flow or being buried by the cleaned silt again.
Three openings are distributed on the outer side barrel wall of the dredging protection device 6: (1) a high-pressure water outlet 6-1 positioned on the outer side wall of the circular table part 6-5; (2) a turbulent flow water outlet 6-2 which is positioned at the tail end of the cylindrical part 6-6 and on the outer side wall of the adjacent region of the circular table part 6-5; (3) a water inlet 6-3 positioned at the outer side wall of the upper end of the cylindrical part 6-6. The three ports are sequentially arranged along the dredging protection device 6 in the longitudinal direction to form a water flow channel. Meanwhile, the water flow channels are arranged on the surface of the dredging protection device 6 at intervals of 60 degrees of the cross section. That is, the side wall of the dredging protection device 6 is provided with 6 water flow channels, and each water flow channel is respectively provided with three ports along the longitudinal direction, namely 6 high-pressure water outlets 6-1 are uniformly distributed on the outer side wall of the circular table part 6-5; 6 disturbed flow water outlets 6-2 are uniformly distributed at the tail end of the cylindrical part 6-6 and on the outer side wall of the area adjacent to the circular table part 6-5; 6 water inlets 6-3 are uniformly distributed on the outer side wall of the upper end of the cylindrical part 6-6.
The high-pressure water outlet 6-1 is used for spraying high-pressure water flow outwards to impact sediment at the river bottom, so that the sediment can be dispersed along with the water flow, and more parts of the buried objects can be exposed. The included angle between the axis of the high-pressure water outlet 6-1 and the horizontal plane is 30-65 degrees, and preferably 45 degrees. So, can make the injection more effective, can strike and raise more silt.
The water inlet 6-3 is used for sucking the water flow in the river under the action of the water pump, and provides continuous water flow to the high-pressure water outlet 6-1 after pressurization. The surface of the water inlet 6-3 is provided with a dense filter screen to prevent weeds and broken stones at the bottom of the river from entering the internal pipeline.
If only two water gaps are arranged, the direction of water flow in the river channel is shown by a dotted line, namely, the water flow with a large amount of silt sprayed out of the high-pressure water outlet 6-1 quickly enters the water inlet 6-3. Therefore, on one hand, silt can enter the water inlet 6-3 to block an internal pipeline, and on the other hand, a large amount of silt can be settled along the barrel wall and is accumulated near the circular platform part 6-5 again, so that the dredging effect is greatly reduced. Therefore, through a large number of experiments, the outer side wall of the tail end of the cylindrical part 6-6 and the adjacent area of the circular table part 6-5 is provided with a turbulent flow water outlet 6-2. A part of the water flow coming from the water inlet 6-3 is distributed to the disturbed flow water outlet 6-2 and is thus ejected, so that the upward water flow ejected from the high pressure water outlet 6-1 flows to the outside, thereby avoiding the above-mentioned problems. This is also one of the points of the invention.
Particularly, the position distance and the water intensity distribution of the three water gaps need to be optimized as follows, so that the water flow can be ensured to flow in the direction of a solid line in the figure, and the effect of rapid dredging is better realized.
Figure 311062DEST_PATH_IMAGE001
And, 2<P1/P2<8；4<H2/H1<16；
Wherein,
Figure 656593DEST_PATH_IMAGE002
6-3 pressure intensity for the water inlet;
Figure 400427DEST_PATH_IMAGE003
6-1 pressure intensity of the high-pressure water outlet;
Figure 933039DEST_PATH_IMAGE004
the pressure of the turbulent water outlet is 6-2, and the unit is atmospheric pressure.
Figure 538464DEST_PATH_IMAGE005
Is the vertical distance between the turbulent flow water outlet 6-2 and the high pressure water outlet 6-1;
Figure 738501DEST_PATH_IMAGE006
is the vertical distance between the turbulent water outlet 6-2 and the water inlet 6-3; a is an empirical coefficient, preferably a = 1.13.
The distribution of the pressure is completed by a pump, a solenoid valve and the like. The above formula is a result obtained by a large number of practical river tests, and is one of the invention points of the invention. Through the experiment, according to arranging mode and pressure distribution mode as above, can promote article fast, specific test data is as follows:
means for solving the problems Traditional wire rope hook type With two water jets and one suction, but three jets arranged at equal intervals and without pressure distribution The above-mentioned modes of the invention
Lifting efficiency 100% 137% 206%
The top end of the dredging protection device 6 is provided with two water cleaning ports 6-4 which are used for introducing clean water after the device is pulled out of the water surface, so that residual silt in the pipeline and each water inlet and outlet is washed clean. The invention is specially designed for realizing the application of the actual scene, can effectively avoid blockage and prolong the service life of equipment, and belongs to one of the invention points.
Connecting rod structure
The link 2 is formed by connecting a plurality of sub-links. Each sub-link includes a male end and a female end, and the male end of one sub-link 2-2 is just inserted into the female end of its adjacent sub-link 2-3 and the two are locked and connected by a pin 2-1. In this way, the two links 2 can rotate relatively in a plane perpendicular to the pin 2-1.
When multiple sub-links are connected, the orientation of adjacent pins 2-1 is generally spaced apart. I.e. if the first pin 2-1 is in the x-direction, the second pin 2-1 is in the y-direction, the third pin 2-1 is in the x-direction, the fourth pin 2-1 is in the y-direction, and so on. With this arrangement, although two adjacent sub-links can rotate relatively in only one plane (xz plane), the sub-links connected with them can rotate in the other vertical plane (yz plane), and the link 2 as a whole can swing in the directions of xy two degrees of freedom. Therefore, the problem that the single connecting rod 2 is too rigid and is broken under the impact of water flow can be avoided, and the invention is also one of the invention points. In addition, in this way, the connecting rod 2 can be easily disassembled. Namely, when in use, the sub-connecting rods can be connected section by section; after the use, the sub-connecting rods can be detached section by section. Because the hoisting device using the connecting rod 2 cannot be wound like a rope, the hoisting device can be prevented from erecting a longer connecting rod 2 for a long time, and the safety and the use convenience are improved.
Method of operation
1. Positioning river bottom articles, driving the connecting rod 2 to move downwards by the driver 1, and continuously installing and fixing a new sub-connecting rod at the upper end of the connecting rod 2 in the process of downward movement of the connecting rod 2, thereby prolonging the length of the connecting rod 2.
2. The hook 5 is fixed on the river bottom article.
3. The lifting device 3 descends to drive the dredging protection device 6 to descend. When the circular table part 6-5 of the dredging protection device 6 contacts sediment at the bottom of the river, the water inlet 6-3 of the dredging protection device 6 starts to absorb water, and water flow is pressurized and then is respectively sprayed out from the high-pressure water outlet 6-1 and the turbulent flow water outlet 6-2.
4. When the turbidity of the water begins to decrease, the rotating motor 4 is started to drive the dredging protection device 6 to rotate and drill downwards. The turbidity of the water can be detected by a sensor arranged at a disturbed flow water outlet 6-2 of the desilting protection device 6.
5. When the resistance of silt exceeds the preset value in the drilling process, the rotating motor 4 is stopped, the water inlet 6-3 of the dredging protection device 6 starts to absorb water again, and water flow is pressurized and then is respectively sprayed out from the high-pressure water outlet 6-1 and the disturbed flow water outlet 6-2.
6. After the sediment around the river bottom articles is cleaned, the driver 1 drives the connecting rod 2 to move upwards, and the articles on the dredging protection device 6 and the lifting hook 5 are gradually pulled out of the water surface. During this process, the dredging protection device 6 is held around the hook 5 article, preventing it from being damaged or falling off by the water impact. Meanwhile, in the process that the connecting rod 2 moves upwards, the sub-connecting rod at the upper end of the connecting rod 2 is continuously taken down.
7. After the articles on the lifting hook 5 are taken down, high-pressure clean water is injected from a clean water port 6-4 at the top of the dredging protection device 6 to flush the interior of the pipeline and each water inlet and outlet, so that the blockage of silt and sundries is avoided.
The above method may be implemented by processor control.
It is to be understood that the present invention includes, in addition to the above, conventional structures and conventional methods, which are well known and will not be described in detail. It is not intended that such structures and methods be present in the present invention.
It will be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications can be made, which are consistent with the principles of this invention, and which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (5)

1. A hoisting equipment for river course which characterized in that:
comprises a driver, a connecting rod, a lifting device, a rotating motor, a lifting hook and a dredging protection device;
the driver is meshed with the connecting rod, and the connecting rod can move up and down under the driving of the driver;
the connecting rod comprises a plurality of sub-connecting rods which are connected, each sub-connecting rod comprises a convex end and a concave end, the convex end of one sub-connecting rod can be just inserted into the concave end of the adjacent sub-connecting rod, and the convex end and the concave end are in locking connection through a pin; when the plurality of sub-connecting rods are connected, the directions of the adjacent pins are mutually vertical;
the lifting device is sleeved at the lower end of the connecting rod, and a gear is arranged in the lifting device and is meshed with the meshed teeth of the connecting rod; a rotating motor and a dredging protection device are sleeved outside the lifting device; the lifting device moves up and down along the connecting rod, so as to drive the rotating motor and the dredging protection device to move up and down along the connecting rod;
the rotating motor is an annular motor, the outer side of the rotating motor is fixedly connected with the dredging protection device, and the inner side of the rotating motor is fixedly sleeved on the lifting device, so that the dredging protection device can rotate around the connecting rod by the driving of the rotating motor;
the dredging protection device is a barrel-shaped structure with a downward opening, the diameter of a barrel opening is smaller than that of a barrel body, namely, the trunk at the upper part of the barrel is a cylindrical part, and the tail end of the barrel is a circular table part; three openings are distributed on the outer side barrel wall of the dredging protection device: (1) the high-pressure water outlet is positioned on the outer side wall of the circular table part; (2) the turbulent flow water outlet is positioned at the tail end of the cylindrical part and on the outer side wall of the adjacent region of the cylindrical part and the circular table part; (3) a water inlet positioned on the outer side wall of the upper end of the cylindrical part;
the three pores satisfy the following conditions:
Figure DEST_PATH_IMAGE002
and, 2<P1/P2<8；4<H2/H1<16；
Wherein,
Figure DEST_PATH_IMAGE004
is the pressure of the water inlet;
Figure DEST_PATH_IMAGE006
the pressure of the high-pressure water outlet is set;
Figure DEST_PATH_IMAGE008
the pressure intensity of the turbulent water outlet is obtained;
Figure DEST_PATH_IMAGE010
the vertical distance between the turbulent water outlet and the high-pressure water outlet is set;
Figure DEST_PATH_IMAGE012
the vertical distance between the turbulent water outlet and the turbulent water inlet is set; a is an empirical coefficient, a = 1.13.
2. The hoisting device of claim 1, wherein: the three ports are sequentially arranged along the longitudinal direction of the dredging protection device to form a water flow channel; the water flow channels are uniformly arranged on the surface of the dredging protection device at intervals of 60 degrees of the cross section.
3. The hoisting device of claim 1, wherein: the surface of the water inlet is provided with a dense filter screen.
4. The hoisting device of claim 1, wherein: when in use, the sub-connecting rods are connected section by section; and after the use is finished, the sub-connecting rods are detached section by section.
5. The hoisting device of claim 1, wherein: the hoisting device is used for hoisting equipment to a hoisting position.
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