CN110329908B - Main crane combined hoisting test method for heavy crane ship - Google Patents
Main crane combined hoisting test method for heavy crane ship Download PDFInfo
- Publication number
- CN110329908B CN110329908B CN201910531422.4A CN201910531422A CN110329908B CN 110329908 B CN110329908 B CN 110329908B CN 201910531422 A CN201910531422 A CN 201910531422A CN 110329908 B CN110329908 B CN 110329908B
- Authority
- CN
- China
- Prior art keywords
- main
- hoisting
- main crane
- crane
- water bag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B66C13/16—Applications of indicating, registering, or weighing devices
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a heavy lift vessel main crane combined hoisting test method, which is based on a combined hoisting auxiliary device, wherein the auxiliary device comprises: the water bag lifting test system comprises a main sling, a lifting beam, a plurality of branch slings and a water bag, wherein the main sling is connected with lifting hooks of a first main sling and a second main sling which are prepared for a combined hoisting test on a ship; the test method comprises the following steps: s1, calculating to obtain the maximum outboard span during the combined hoisting according to the maximum heavy-load working radius of the first main crane and the second main crane and the length of the hoisting arm; and S2, rotating the suspension arms of the first main crane and the second main crane to reach the maximum outboard span in S1. The invention has the advantages that the loads of the two main cranes are increased gently by adding water, so that the impact of sudden loading is avoided, and meanwhile, the problem that the concentrated load exceeds the bearing force of a wharf is avoided by adopting the method of hoisting the water bag and then filling water.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a main crane combined hoisting test method for a heavy crane ship.
Background
In the construction of a heavy lift ship, two main lifts are designed to be connected with each other through a lifting beam in the heavy lift, and the total load reaches the sum of the maximum safe working load of the two cranes, namely twice of the maximum safe working load of a single crane.
In the test stage, the classification society only stipulates the test requirements of a single crane, and does not require a combined hoisting test. But from the perspective of ship utilization, the capacity of the combined hoisting can be verified only through the combined hoisting test. The combined hoisting test influences the stability of ships, tests the limit capacity of the ships and cranes, has great risk, and has the accidents of boom breakage and ship damage in shipyards at home and abroad. The risk factors come from the design calculation of the ship, the arrangement of the suspension arm and the load, the artificial misoperation of disturbance during operation, the ship oscillation caused by extra stress of the lifting hook due to weather change and the like. At present, no record of the united crane debugging of the heavy lift vessel of the main crane with more than 400t exists in China.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a main crane combined hoisting test method for a heavy crane ship, which can reduce risks, achieve the purpose of verifying the combined hoisting performance, and can be suitable for a heavy crane combined hoisting test of more than 400 t.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for testing a main crane of a heavy lift ship by combined hoisting is characterized in that the method is based on a combined hoisting auxiliary device which comprises the following steps: the water bag lifting test system comprises a main sling, a lifting beam, a plurality of branch slings and a water bag, wherein the main sling is connected with lifting hooks of a first main sling and a second main sling which are prepared for a combined hoisting test on a ship; the test method comprises the following steps: s1, calculating to obtain the maximum outboard span during the combined hoisting according to the maximum heavy-load working radius of the first main crane and the second main crane and the length of the hoisting arm; s2, rotating the suspension arms of the first main crane and the second main crane to reach the maximum outboard span in S1; s3, adding auxiliary devices on the first main crane and the second main crane; s4, the first main crane and the second main crane are jointly lifted, so that the water bag at the bottommost part reaches a preset height from the ground; s5, adjusting the ship to the reverse pretilt angle required by the design; s6, filling water with a preset weight into the water bag, stopping and recording the transverse inclination angle of the ship, and keeping the floating state of the ship by allocating ballast water; and S7, repeating S6 until the total hoisting weight of the first main hoisting and the second main hoisting reaches a preset load, and judging that the first main hoisting and the second main hoisting meet the designed combined hoisting performance if the transverse inclination angle of the ship accords with a design calculated value and all the parts of the first main hoisting and the second main hoisting work normally.
Preferably, in step S6, if the roll angle exceeds the design requirement by 1 degree, the test is terminated.
Preferably, the predetermined weight is 5-20 t.
Preferably, the predetermined weight is 10 t.
Preferably, the maximum weight of the single water bag is 100t and the predetermined load is 900 t.
Preferably, in S7, the first and second main cranes are kept unchanged, and if the bottommost water bag abuts against the ground due to the increased load, the first and second main cranes are lifted so that the bottommost water bag reaches a predetermined height from the ground.
Preferably, the predetermined height is 1 m.
Preferably, a force measuring device is connected between the branch sling and the water bag, and the force measuring device is connected with the water bag through a shackle.
Preferably, the water bag is filled with water through an external water pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. the loads of the two main cranes are gently increased by adding water, so that the impact of sudden loading is avoided, and meanwhile, the problem that the concentrated load exceeds the bearing capacity of a wharf is avoided by adopting the steps of lifting the water bag and then filling water;
2. the two heavy cranes are kept unchanged and are in a passive state in the loading and water filling process, so that the disturbance caused by complex associated operation and operation is avoided, and the risk is reduced;
3. the method is convenient to monitor the inclination angle at any time, and the test is stopped at any time when the inclination angle exceeds the design limit, so that calculation and correction are carried out, and the parameters are adjusted for retesting.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a side view of the overall structure of the present invention.
FIG. 2 is a schematic side view of another perspective of the overall structure of the present invention.
Fig. 3 is a schematic top view of the overall structure of the present invention.
Fig. 4 is a schematic view of another water-bag-hanging method with the integral structure of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1 to 4, the present embodiment provides a method for testing a main crane of a heavy lift vessel by a combined crane, which is characterized in that the method is based on a combined crane auxiliary device, where the auxiliary device includes: the water bag lifting test device comprises a main sling, a lifting beam, a plurality of branch slings and a water bag, wherein the main sling is connected with lifting hooks of a first main sling 8 and a second main sling 9 which are prepared for a combined lifting test on a ship; the test method comprises the following steps: s1, calculating to obtain the maximum outboard span during the combined hoisting according to the maximum heavy-load working radius of the first main crane and the second main crane and the length of the hoisting arm; s2, rotating the suspension arms of the first main crane and the second main crane to reach the maximum outboard span in S1; s3, adding auxiliary devices on the first main crane and the second main crane; s4, the first main crane and the second main crane are jointly lifted, so that the water bag at the bottommost part reaches a preset height from the ground; s5, adjusting the ship to the reverse pretilt angle required by the design; s6, filling water with a preset weight into the water bag, stopping and recording the transverse inclination angle of the ship, and keeping the floating state of the ship by allocating ballast water; and S7, repeating S6 until the total hoisting weight of the first main hoisting and the second main hoisting reaches a preset load, and judging that the first main hoisting and the second main hoisting meet the designed combined hoisting performance if the transverse inclination angle of the ship accords with a design calculated value and all the parts of the first main hoisting and the second main hoisting work normally. The water bag can be replaced by a water tank.
Preferably, the length of the branch sling is divided into two lengths, so that the branch sling is used for forming two rows of water bags with different heights after being hoisted, and is particularly suitable for the condition that the water bags are not hung enough on the hoisting beam in a row.
The predetermined weight is 5-20 t. The predetermined weight is 10 t. The maximum weight of the single water bag is 100t and the predetermined load is 900 t. The predetermined height is 1 m. The force measuring device is connected between the sling and the water bag and is connected with the water bag through a shackle. The water bag is filled with water through an external water pipe.
In step S6, if the roll angle exceeds the design requirement of 1 degree, the test is terminated.
In S7, the first and second main cranes are kept unchanged, and if the bottommost water bag abuts against the ground due to the increase of the load, the first and second main cranes are lifted to make the bottommost water bag reach a predetermined height from the ground.
Firstly, in the early stage of preparation, the ship design provides a joint-hang calculation book (including complete stability) approved by a classification society, and provides a joint-hang stowage condition.
Before the test, related systems and equipment for the combined hoisting test, such as a ballast water system, an anti-heeling system, a crane and the like, need to be checked and confirmed again; secondly, in terms of equipment materials and personnel preparation: the hoisting tools such as hanging beams, rigging and the like, and the load water bag or the water tank need to be implemented in advance.
And the site general command is needed when the combined hoisting test is carried out.
Bridge control personnel, deck operating personnel and crane drivers are needed when the combined hoisting test is carried out, and the bridge control personnel, the deck operating personnel and the crane drivers need to be highly coordinated, unified and closely related. The control of the bridge and the anti-heeling pump must be under the responsibility of a specially-assigned person.
During the test, the whole process is relatively slow and smooth, and is stopped and recorded every time a certain load is added, such as 10t or 50t (the specific load is determined by calculation); and in the hoisting test process, ballast water is allocated to ensure that the ship transverse inclination angle meets the design requirement, and then a loading test is carried out. And (4) carrying out a hoisting test, namely filling water at a position 1m away from the ground to reach the total load of the test.
Considering that the wharf has a load bearing capacity of only about 20t per square meter, the load water bag needs to be lifted away from the wharf and then filled with water during a heavy lifting test, so that the test weight is increased.
The left inclination angle exceeds 1 degree of the design requirement in the loading process, and the test is terminated even if the combined hoisting load does not reach the total load. The scheme is feasible in technology and production and controllable in risk.
Take two 450t combined hoisting total load 900t configured water bags as an example:
and obtaining the maximum outboard span of the combined crane according to the maximum working radius of the heavy loads of the two heavy cranes and the length of the lifting beam. The crane rotates to the corresponding position on the wharf side, namely the most unfavorable limit position, and the main sling 1 is hung; a hanging beam 2; a sling 3; shackle 4; a force measuring device 5; a water bag 6. The bottom of the water bag is adjusted to be about 1 meter higher than the dock floor.
The ship is adjusted to the reverse pretilt angle required by the design. The heavy crane is arranged on the port of the ship, the water bag is also arranged on the left side of the ship, and because the hoisting weight is arranged on the left side, a certain left inclination angle of the ship in the process of hoisting the heavy object can be calculated and predicted, and then the ship can have a certain right inclination angle by allocating ballast water initially, so that the transverse inclination angle of the ship is within the design requirement range when the heavy object is hoisted.
The water bag 6 is filled with water through the water pipe 7 to reach a total load of 900t (comprising the sum of the hanging beam, the branch sling, the shackle 4, the force measuring device, the water bag and the water). During the period, the ship is monitored by a dynamometer, stops and records each time a certain load is added, such as 10t (the specific load is determined by calculation), and gradually returns to the normal floating position and continues to incline left, and then the ship keeps a floating state by allocating ballast water.
The two cranes do not require any motion during loading, but the hook can be raised and lowered a little to compensate for the rise and fall caused by the increase in load.
And loading until the total load is 900t, wherein the left inclination angle is in accordance with the calculated design value. And recording the load and the actual inclination angle every 10t in the whole process.
In the process, once the left inclination angle exceeds the design requirement of +1 degree, the test is terminated even if the combined suspended load does not reach the total load. And then a corresponding solution is made.
After the heavy crane test is completed, all parts of the crane are thoroughly inspected, including deformation, cracks, breakage and the like of the parts. The crane is a foreign word, and is also called as a marine crane and a marine crane, and is a large deck machinery on a ship, which is equipment for loading and unloading goods on the ship, and the hydraulic crane is loading and unloading equipment commonly used on the ship. The crane is the first main crane and the second main crane.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (9)
1. A method for testing a main crane of a heavy lift ship by combined hoisting is characterized in that the method is based on a combined hoisting auxiliary device which comprises the following steps: the water bag lifting test system comprises a main sling (1) connected with lifting hooks of a first main crane (8) and a second main crane (9) to be subjected to a combined lifting test on a ship, a lifting beam (2) connected to the lower end of the main sling (1), a plurality of branch slings (3) connected to the lower part of the lifting beam (2), and a water bag (6) connected below the branch slings (3);
the test method comprises the following steps:
s1, calculating to obtain the maximum outboard span during the combined hoisting according to the maximum heavy-load working radius of the first main crane (8) and the second main crane (9) and the length of the suspension arm;
s2, rotating the suspension arms of the first main crane (8) and the second main crane (9) to reach the maximum outboard span in S1;
s3, adding auxiliary devices on the first main crane (8) and the second main crane (9);
s4, the first main crane (8) and the second main crane (9) are jointly hoisted to enable the water bag (6) at the bottommost part to reach a preset height from the ground;
s5, adjusting the ship to the reverse pretilt angle required by the design;
s6, filling water with preset weight into the water bag (6), stopping and recording the transverse inclination angle of the ship, and keeping the floating state of the ship by mixing ballast water;
and S7, repeating the step S6 until the total hoisting weight of the first main crane (8) and the second main crane (9) reaches a preset load, and judging that the first main crane (8) and the second main crane (9) meet the designed combined hoisting performance if the transverse inclination angle of the ship accords with a design calculation value and each part of the first main crane (8) and the second main crane (9) normally works.
2. The method for testing the main crane of the heavy lift vessel as claimed in claim 1, wherein in the step S6, if the roll angle exceeds 1 degree of the design requirement, the test is terminated.
3. The main crane combined hoisting test method for the heavy lift vessel as claimed in claim 1, wherein the predetermined weight is 5-20 t.
4. The main crane combined hoisting test method for the heavy lift vessel according to claim 3, wherein the predetermined weight is 10 t.
5. The main crane combined hoisting test method of claim 1, wherein the maximum weight of the single water bag (6) is 100t, and the predetermined load is 900 t.
6. The method for testing the combined hoisting of the main hoisting of the heavy lift vessel as claimed in claim 1, wherein in step S7, the first main hoisting (8) and the second main hoisting (9) are maintained, and if the bottommost water bag (6) abuts against the ground due to the increase of the load, the first main hoisting (8) and the second main hoisting (9) are lifted to enable the bottommost water bag (6) to reach a preset height from the ground.
7. The main crane combined hoisting test method for the heavy lift vessel as claimed in claim 1, wherein the predetermined height is 1 m.
8. The method for testing the main crane combined hoisting of the heavy lift vessel as claimed in claim 1, wherein a force measuring device (5) is connected between the branch hoisting line (3) and the water bag (6), and the force measuring device (5) is connected with the water bag (6) through a shackle (4).
9. The main crane combined hoisting test method for the heavy lift vessel as claimed in claim 1, wherein the water bag (6) is filled with water through an external water pipe (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910531422.4A CN110329908B (en) | 2019-06-19 | 2019-06-19 | Main crane combined hoisting test method for heavy crane ship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910531422.4A CN110329908B (en) | 2019-06-19 | 2019-06-19 | Main crane combined hoisting test method for heavy crane ship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110329908A CN110329908A (en) | 2019-10-15 |
| CN110329908B true CN110329908B (en) | 2020-08-07 |
Family
ID=68142091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910531422.4A Active CN110329908B (en) | 2019-06-19 | 2019-06-19 | Main crane combined hoisting test method for heavy crane ship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110329908B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113247772B (en) * | 2021-03-29 | 2022-08-26 | 中船澄西船舶修造有限公司 | Load test method after crane real ship installation |
| CN114194353A (en) * | 2021-12-01 | 2022-03-18 | 沪东中华造船(集团)有限公司 | Marine crane combined hoisting test method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2411776B (en) * | 2004-03-03 | 2007-12-12 | Hugh Michael Oppen Pratt | Tag line insulator |
| CN101927962A (en) * | 2010-09-27 | 2010-12-29 | 中国葛洲坝集团机械船舶有限公司 | Method for hoisting large-sized workpiece with double gantry cranes and lifting appliance |
| CN103738852B (en) * | 2014-01-09 | 2016-02-24 | 无锡沃特力材料科技有限公司 | Hoisting crane test mass device |
| CN106629423A (en) * | 2016-10-27 | 2017-05-10 | 泰州三福船舶工程有限公司 | Crane joint-hanging testing device and method |
-
2019
- 2019-06-19 CN CN201910531422.4A patent/CN110329908B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110329908A (en) | 2019-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109319041B (en) | Method for turning over irregular U-shaped block of chemical tanker | |
| CN110329908B (en) | Main crane combined hoisting test method for heavy crane ship | |
| NL2024562B1 (en) | A feeder vessel | |
| JP7355806B2 (en) | Device and method for lifting objects from the deck of a ship exposed to movement | |
| WO2023279623A1 (en) | Floating ship lifting structure and method therefor | |
| CN105060093A (en) | Integral hoisting method of front and rear crossbeam assemblies of quayside container crane | |
| CN206033063U (en) | Electronic change width of cloth loop wheel machine | |
| CN105947910B (en) | The hoisting of FPSO crane superstructures | |
| CN210313246U (en) | Self-balancing hoisting apparatus and fire fighting device | |
| CN201686393U (en) | Derrick mast hoisting tool | |
| CN106564819B (en) | A kind of heavy loop wheel machine peculiar to vessel and underwater mounting process | |
| CN201961951U (en) | Internal operation free large cylinder sling | |
| CN115258909A (en) | Horizontal-lifting tail sliding system and method for offshore wind turbine tower | |
| CN111337281A (en) | Method for heavy-load test of semi-submersible type hoisting and disassembling platform | |
| CN108689316A (en) | A kind of crane barge ship | |
| CN112129561A (en) | Crane load test method | |
| CN208856786U (en) | Hoisting tooling suitable for Turbo-charged Marine Boiler | |
| CN105129622A (en) | Segmental hoisting process method | |
| CN207419427U (en) | A kind of ocean platform with cross-platform work crane | |
| CN217650771U (en) | High-strength straight-arm ship crane | |
| CN213738335U (en) | Ultralow space cantilever lifting device | |
| CN217867758U (en) | Four-point hanging beam for large-scale floating crane | |
| CN203653073U (en) | Novel combined type telescopic hanger device | |
| CN115849194A (en) | 3000t crane load test method | |
| CN115384723A (en) | Method for hoisting ship to launch by adopting double floating cranes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |