CN114194353A - Marine crane combined hoisting test method - Google Patents
Marine crane combined hoisting test method Download PDFInfo
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- CN114194353A CN114194353A CN202111454776.7A CN202111454776A CN114194353A CN 114194353 A CN114194353 A CN 114194353A CN 202111454776 A CN202111454776 A CN 202111454776A CN 114194353 A CN114194353 A CN 114194353A
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- crane
- hoisting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
Abstract
The invention relates to a combined hoisting test method for a marine crane, which comprises the following steps: splicing respective lifting beams of two cranes to form a test lifting beam; step two, connecting the test hanging beam with a crane, and connecting a plurality of water bags on the test hanging beam; step three, reversely adjusting the ballast state of the ship, and filling water into the water bag until the test tonnage; and step four, operating the two cranes to simultaneously lift and lower the water bag, carrying out a brake test, discharging water in the water bag after the test is finished, and detaching the test hanging beam to finish the test. According to the test method, the water bag and the hanging beam of the crane are used for carrying out the retry test of the crane-linked hanging without specially customizing the test hanging beam and a heavy object, so that the cost of the linked hanging test is reduced, the efficiency of the linked hanging test is improved, the operation is simple, the risk control capability is strong, and the method can be widely applied to the crane-linked hanging test.
Description
Technical Field
The invention relates to the field of ship construction, in particular to a combined hoisting test method for a ship crane.
Background
At present, ships with large cranes are widely applied to the market, large heavy objects can be loaded and unloaded by the ships, and the dependence on wharf cranes and the limit of special large cranes on wharfs can be reduced.
The crane is used as the core equipment of the ship, and because the crane has heavy weight, in order to verify the maximum lifting capacity, the combined lifting test of two cranes is generally carried out, the lifting capacity in the test process is large, and a large safety risk exists when the test is carried out in a shipyard. Meanwhile, if the tools and tools configured in the whole test are customized by a special ship, the cost is high, the period is long, and the tools and tools are difficult to be practically applied to shipbuilding production.
Disclosure of Invention
In order to solve the technical problems, the invention provides a combined crane test method for a marine crane, which is used for testing the lifting capacity of the crane, reduces the test cost and has significance for being applied to actual production.
The technical purpose of the invention is realized by the following technical scheme:
a combined hoisting test method for a marine crane comprises the following steps:
splicing respective lifting beams of two cranes to form a test lifting beam;
step two, connecting the test hanging beam with a crane, and connecting a plurality of water bags on the test hanging beam;
step three, reversely adjusting the ballast state of the ship, and filling water into the water bag until the test tonnage;
and step four, operating the two cranes to simultaneously lift and lower the water bag, carrying out a brake test, discharging water in the water bag after the test is finished, and detaching the test hanging beam to finish the test.
Furthermore, in the first step, the respective equipped hanging beams of the two cranes are arranged in parallel, and the two hanging beams are fixed together by connecting the cable piles to simultaneously penetrate through the two parallel hanging beams.
Further, before the water bag is filled with water, the distance between the test hanging beam and the ship board and the height of the water bag from the wharf are measured, and the distance between the test hanging beam and the ship board and the height of the water bag from the wharf are adjusted to accord with the safety limit range of theoretical calculation.
Further, in the third step, a crane is installed on one side of the ship body, the state of the ship is adjusted to be inclined to the other side in advance, and then water is injected into the water bag until the tonnage of the test is achieved.
Furthermore, the hanging beams are provided with pin holes for connecting cable piles, when the hanging beams are spliced for test, the two hanging beams are placed on a plane, two jacking devices are respectively arranged at two ends of the bottom of each hanging beam, the relative heights of the two hanging beams are adjusted through the jacking devices, so that the pin holes in the two hanging beams are aligned, and then the connecting cable piles simultaneously penetrate through the pin holes of the two hanging beams to splice the two hanging beams together.
Furthermore, a crane is arranged at the side of the ship body close to the wharf side, and the water bag is arranged below the test hanging beam.
Further, the distance between the water bag and the wharf is more than 1 m.
Further, when the state of the ship is adjusted in advance, the ship body is inclined in advance to the side where the crane is not installed toward the side where the crane is not installed.
Further, before the water bag is filled with water, the method also comprises a no-load test of the hanging beam, a combined hanging simulation test of the water bag which is not filled with water is carried out, and whether the test conditions are complete or not is checked.
Compared with the prior art, the test method has the advantages that the water bag and the hanging beam of the crane are used for conducting the retry test of the combined hanging of the crane through the test method, the test hanging beam and the heavy object do not need to be specially customized, the cost of the combined hanging test is reduced, the efficiency of the combined hanging test is improved, the operation is simple, the risk control capability is strong, and the test method can be widely applied to the combined hanging test of the crane.
Drawings
FIG. 1 is a schematic view showing the installation of the water bag of the present invention.
Fig. 2 is a schematic diagram of the splicing of the test hanging beam in the invention.
Fig. 3 is a top view of a crane installation of the present invention.
FIG. 4 is a schematic diagram of a crane-linked test in the present invention.
In the figure, 1, connecting cable piles; 2. a pin hole; 3. a test hanging beam; 4. a hanging beam; 5. a water bag; 6. a suspension arm; 7. a laser theodolite; 8. a water injection pipe.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments:
a combined hoisting test method for a marine crane comprises the following steps:
step one, as shown in fig. 1 and 2, splicing respective lifting beams 4 of two cranes together to form a test lifting beam 3; the hanging beams 4 respectively equipped on the two cranes are arranged in parallel, and the two hanging beams are fixed together by connecting the cable piles 1 and simultaneously penetrating through the two hanging beams 4 arranged in parallel.
And all parameters of the two used cranes are in accordance with the factory acceptance standard, and the risk that the performance of a single crane influences the coordination operation of the two cranes in the combined crane test process is eliminated.
Specifically, be equipped with the pinhole 2 that is used for connecting the installation of bollard on the hanging beam, during the experimental hanging beam 3 of concatenation, place two hanging beams 4 on the plane, a jacking device is arranged respectively at the bottom both ends of every hanging beam, adjusts the relative height of two hanging beams through jacking device, and hydraulic jack is chooseed for use to the jacking device, makes pinhole 2 on two hanging beams align through hydraulic jack, then will connect the bollard and pass pinhole 2 of two hanging beams simultaneously and splice two hanging beams 4 together. Paint, burrs and the like in the pin holes are cleaned clearly through a grinding machine, and the connecting cable piles are inserted after butter is smeared in the pin holes.
Step two, connecting the test hanging beam 3 with a hanging arm 6 of a crane through a hanging rope, and connecting a plurality of water bags 5 on the test hanging beam;
and step three, as shown in fig. 3 and 4, a crane is arranged on the side of the ship body board close to one side of the wharf, and the water bag 5 is arranged below the test hanging beam 3.
The hoisting beam has larger test weight, which can cause the possibility of the ship body overturning, so that the ship body is prevented from overturning in an overload way by a pre-inclination way. The ship state is adjusted to incline to the side where the crane is not installed in advance by adding water to carry load; then water is injected into the water bag through a water injection pipe 8 until the test tonnage is reached.
Before water is filled into the water bag 5, measuring the distance between the test hanging beam and the ship board and the height of the water bag from the wharf, and adjusting the distance between the test hanging beam and the ship board and the height of the water bag from the wharf to be in accordance with the safety limit range of theoretical calculation; the distance between the water bag and the wharf is more than 1 m.
In order to ensure that the lifting force of each crane only overcomes the gravity of the water bag in the vertical direction in the process of the combined lifting test of the two cranes, the positions of the two cranes and the lifting beam need to be strictly controlled.
As shown in figure 3, the distance between the hoisting points at the two ends of the test hoisting beam is 26000mm, the theoretical value of the included angle between the hoisting arm and the longitudinal direction of the ship body is 44.32 degrees, the distance between the test hoisting beam and the broadside of the ship body is 8801mm, the two cranes are symmetrically arranged, and because the length of the hoisting arm is fixed, under the condition that the size of the crane is fixed, as long as the distance between the test hoisting beam and the outer plate of the ship body is 8801mm and the hoisting beam is parallel to the outer plate of the ship body, the distance between the hoisting points of the two cranes is 26000mm, the hoisting force of the crane is just above the hoisting point of the hoisting beam, and the gravity of the hoisted objects such as water bags and the like is overcome only in the vertical direction.
But the included angle of the crane cannot be accurately two positions behind a decimal point, but can only reach one position behind the decimal point, when the included angle between the suspension arm and the ship side outer plate is not 44.32 degrees, because the suspension points at the two ends of the test suspension beam are fixed, the lifting rope connected between the suspension arm and the test suspension beam can be obliquely arranged, and the force provided by the crane is greater than the gravity of the test suspension beam and the borne water bag; the angle of the fine tuning davit satisfies that the distance between the test hanging beam and the hull side planking is equal to the distance between the test hanging beam and the hull side planking (8801mm), then can guarantee that the test hanging beam can not receive the pulling force that can not receive inclination between order hoist and the test hanging beam for the load that the davit of order hoist provided comes from the weight of test hanging beam and water bag.
Therefore, a laser theodolite 7 is erected at a position which is 8801mm away from the ship side outer plate on the wharf in the bow direction, the position of the test hanging beam 3 is calibrated through the laser theodolite to be parallel to the ship side outer plate (the longitudinal direction of the ship), and the distance between the test hanging beam and the ship side outer plate is 8801 mm.
And step four, operating the two cranes to simultaneously lift and lower the water bag, carrying out a brake test, discharging water in the water bag after the test is finished, and detaching the test hanging beam to finish the test.
In order to ensure that each operation in the test process can respond in time, the position of the ship state is adjusted, and special posts are required to be arranged for remote control of a butterfly valve, a spray pump and a transverse inclination pump.
When two cranes are tested simultaneously, the required power is large, although the two generators can meet the power supply requirement, in order to prevent the temporary fault in the test process, another generator needs to be prepared for standby.
Before the hull is tested, the boarding ladder is still to be dismantled, the ship is prevented from being inclined, pulled out and broken, and the accident is avoided by personnel in the test process through the boarding ladder.
The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.
Claims (9)
1. A combined hoisting test method for a marine crane is characterized by comprising the following steps:
splicing respective lifting beams of two cranes to form a test lifting beam;
step two, connecting the test hanging beam with a crane, and connecting a plurality of water bags on the test hanging beam;
step three, reversely adjusting the ballast state of the ship, and filling water into the water bag until the test tonnage;
and step four, operating the two cranes to simultaneously lift and lower the water bag, carrying out a brake test, discharging water in the water bag after the test is finished, and detaching the test hanging beam to finish the test.
2. The method for testing the combined crane of the marine crane as claimed in claim 1, wherein in the step one, the crane beams of the two cranes are arranged in parallel, and the two crane beams are fixed together by connecting the cable piles to simultaneously penetrate through the two parallel crane beams.
3. The method for testing the combined hoisting of the ship crane according to claim 1, wherein the distance between the test hoisting beam and the ship board and the height of the water bag from the wharf are measured before the water bag is filled with water, and the distance between the test hoisting beam and the ship board and the height of the water bag from the wharf are adjusted to meet the safety limit range of theoretical calculation.
4. The method for testing the combined crane of the marine crane as claimed in claim 1, wherein in the third step, the crane is installed on one side of the hull, the state of the ship is adjusted to be inclined to the other side in advance, and then the water bag is filled with water to the test tonnage.
5. The test method for the combined hoisting of the marine crane according to claim 1 or 2, wherein the hoisting beams are provided with pin holes for connecting the installation of cable piles, when the test hoisting beams are spliced, the two hoisting beams are placed on a plane, two jacking devices are respectively arranged at two ends of the bottom of each hoisting beam, the relative heights of the two hoisting beams are adjusted through the jacking devices so that the pin holes of the two hoisting beams are aligned, and then the connecting cable piles simultaneously penetrate through the pin holes of the two hoisting beams to splice the two hoisting beams together.
6. The method for testing the ship crane combination as claimed in claim 1, wherein the crane is mounted on the side of the ship body close to the wharf side, and the water bag is mounted below the test hanging beam.
7. The method for testing the combined hoisting of the marine crane according to claim 3, wherein the distance between the water bag and the wharf is more than 1 m.
8. The method for testing the combined hoisting of the marine crane according to claim 4, wherein when the state of the vessel is adjusted in advance, the weight is applied to the side of the hull to which the crane is not attached so that the hull is inclined in advance to the side to which the crane is not attached.
9. The method for testing the combined hoisting of the marine crane as claimed in claim 1, wherein the water bag before being filled with water further comprises an idle test of the hoisting beam, a combined hoisting simulation test of the water bag without being filled with water, and a test condition for checking whether the test condition is complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111454776.7A CN114194353A (en) | 2021-12-01 | 2021-12-01 | Marine crane combined hoisting test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111454776.7A CN114194353A (en) | 2021-12-01 | 2021-12-01 | Marine crane combined hoisting test method |
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| CN114194353A true CN114194353A (en) | 2022-03-18 |
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| CN202111454776.7A Pending CN114194353A (en) | 2021-12-01 | 2021-12-01 | Marine crane combined hoisting test method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200181248Y1 (en) * | 1999-11-25 | 2000-05-15 | 박문업 | The weight test device of ship's boat launch |
| CN201024038Y (en) * | 2006-12-25 | 2008-02-20 | 上海人造板机器厂有限公司 | Suspension girder for two trolleys synchronous hoisting |
| CN203781677U (en) * | 2014-01-09 | 2014-08-20 | 无锡沃特力材料科技有限公司 | Trial mass device of crane |
| CN110329908A (en) * | 2019-06-19 | 2019-10-15 | 沪东中华造船(集团)有限公司 | A kind of heavy lift carrier master hangs connection and hangs test method |
| CN211769751U (en) * | 2019-10-30 | 2020-10-27 | 中冶陕压重工设备有限公司 | Hanging beam device for lifting double overhead travelling cranes |
-
2021
- 2021-12-01 CN CN202111454776.7A patent/CN114194353A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200181248Y1 (en) * | 1999-11-25 | 2000-05-15 | 박문업 | The weight test device of ship's boat launch |
| CN201024038Y (en) * | 2006-12-25 | 2008-02-20 | 上海人造板机器厂有限公司 | Suspension girder for two trolleys synchronous hoisting |
| CN203781677U (en) * | 2014-01-09 | 2014-08-20 | 无锡沃特力材料科技有限公司 | Trial mass device of crane |
| CN110329908A (en) * | 2019-06-19 | 2019-10-15 | 沪东中华造船(集团)有限公司 | A kind of heavy lift carrier master hangs connection and hangs test method |
| CN211769751U (en) * | 2019-10-30 | 2020-10-27 | 中冶陕压重工设备有限公司 | Hanging beam device for lifting double overhead travelling cranes |
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