CN112078745A - LNG ship ballast tank strength test system - Google Patents
LNG ship ballast tank strength test system Download PDFInfo
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- CN112078745A CN112078745A CN202010800016.6A CN202010800016A CN112078745A CN 112078745 A CN112078745 A CN 112078745A CN 202010800016 A CN202010800016 A CN 202010800016A CN 112078745 A CN112078745 A CN 112078745A
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- 238000012360 testing method Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 239000013535 sea water Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
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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
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a strength test system for ballast tanks of LNG ships, which is suitable for the strength test of the ballast tanks of large ships with 6600V ballast pumps, and comprises a temporary pump, wherein a water inlet of the temporary pump is connected with a water suction pipe, a water outlet of the temporary pump is respectively connected with a water inlet pipe and a water discharge pipe, the water inlet pipe is connected with a water inlet of a first water pipe, the first water pipe is respectively connected with a ballast main pipe of each ballast tank, a second water pipe is connected between the water inlet of the first water pipe and the water inlet of the temporary pump, and valves are respectively arranged on the water suction pipe, the water inlet pipe, the water discharge pipe, the first water pipe, the second water pipe and a ballast main pipe of each ballast tank. The method greatly accelerates the process of the ballast tank strength test, saves the test time, ensures that the subsequent ship containment system is installed as soon as possible, and shortens the construction period of the LNG ship wharf.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a strength test system for an LNG ship ballast tank.
Background
In the process of building a large LNG ship, the installation of the cargo hold containment system is a very critical work which most influences the building period, and in order to ensure the construction quality of the cargo hold, the installation of the corresponding containment system can be carried out only after the strength test of the ballast holds arranged on the two sides of the cargo hold is finished. This means that after the vessel is launched, the ballast tank strength test must be completed as soon as possible to shorten the overall vessel construction cycle.
The ballast pump of the large LNG ship is a 6600V motor, and can only be driven by a ship generator and cannot be driven by shore power, but when the ballast tank is subjected to a strength test, power and electric equipment on the ship are not completed, so that the ballast tank cannot be ballasted and discharged by using the ballast pump in the strength test stage.
Disclosure of Invention
In view of the above, the present invention provides a system for testing the strength of a ballast tank of an LNG ship, which is used to solve the above problems in the background art.
The utility model provides a LNG ship ballast tank strength test system, this system is applicable to the ballast tank strength test that the ballast pump is 6600V's large-scale boats and ships, the system includes the temporary pump, the water inlet of temporary pump is connected and is absorbed water the pipe, the delivery port is connected inlet tube and drain pipe respectively, the inlet tube links to each other with the water inlet of first raceway, first raceway links to each other with the ballast house steward of each ballast tank respectively, be connected with the second raceway between the water inlet of first raceway and the water inlet of temporary pump, all install the valve on the ballast house steward of pipe, inlet tube, drain pipe, first raceway, second raceway and each ballast tank.
Preferably, the ballast tanks include a left side tank and a right side tank,
the water inlet pipe, the first water pipe and the second water pipe in the temporary test pipeline are all set into a left path and a right path, one end of the left path water inlet pipe and one end of the right path water inlet pipe are connected to an outlet of the temporary pump, the other end of the left path water inlet pipe and the other end of the right path water inlet pipe are connected with the corresponding first water pipe, the left side cabin of all ballast tanks are connected with the left first water pipe, and the right side cabin of all ballast tanks are connected with the right first water pipe.
Preferably, install first interim valve on the pipe that absorbs water, install the interim valve of second on the left second raceway, install the interim valve of third on the right second raceway, install the interim valve of fourth on the left inlet tube, install the interim valve of fifth on the inlet tube on the right side, install the interim valve of sixth on the drain pipe.
Preferably, the water suction pipe is provided with a filter.
Preferably, the suction port of the suction pipe is arranged in seawater or river water at the berth of the ship, or the suction port of the suction pipe is connected with a wharf fire-fighting water pipe.
Preferably, the temporary pump can be a 440V shore power driven fire pump or other pump with the same displacement, and the displacement of the temporary pump is at least 10 times of that of the wharf fire pump or the submersible pump.
The invention has the beneficial effects that:
1. the invention is suitable for the strength test of the ballast tank of the large-scale ship with the ballast pump of 6600V, can carry out the strength test of all ballast tanks in the ship by installing the temporary test pipeline, overcomes the problem that the ballast pump cannot be used in the test stage so as to cause the loading and the unloading of the ballast tank, greatly accelerates the process of the strength test of the ballast tank, saves the test time, ensures the quick installation of the subsequent ship containment system and shortens the construction period of the LNG ship terminal.
2. The discharge capacity of the temporary pump used in the method is more than 10 times of that of the wharf fire water or the submersible pump, so that a large amount of loading and discharging time can be saved, and meanwhile, the temporary pump, the filter and the temporary valves on all pipelines are all existing equipment on a ship, so that extra construction cost is not generated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described 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 diagram of the system of the present invention.
Fig. 2 is a schematic view of a temporary pump adding water from the outside to the ballast tank.
Fig. 3 is a schematic illustration of the transfer of water remaining in the left side tank of the ballast tank currently being tested to the right side tank of the ballast tank to be tested.
Fig. 4 is a schematic illustration of the transfer of water remaining in the right side tank of the ballast tank currently being tested to the left side tank of the ballast tank to be tested.
Fig. 5 is a schematic view of the discharge of water from the ballast tank.
The reference numerals in the figures have the meaning:
1 is the temporary pump, 2 is the pipe that absorbs water, 3 is the inlet tube, 4 is the drain pipe, 5 is first raceway, 6 is the second raceway, 7 is the ballast house steward, 8 is the left side cabin, 9 is the right side cabin, 10 is the suction inlet of the pipe that absorbs water, 11 is the filter.
Detailed Description
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.
In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present application, it should be understood that the terms "left" and "right" used in the description of the embodiments of the present application are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present application.
The invention provides a system for testing the strength of a ballast tank of an LNG ship, which is suitable for testing the strength of the ballast tank of a large ship with a 6600V ballast pump.
Specifically, the LNG ship ballast tank strength test system comprises a temporary pump 1, a water inlet of the temporary pump 1 is connected with a water suction pipe 2, a water outlet of the temporary pump is respectively connected with a water inlet pipe 3 and a water discharge pipe 4, the water inlet pipe 3 is connected with a water inlet of a first water conveying pipe 5, the first water conveying pipe 5 is respectively connected with a ballast main pipe 7 of each ballast tank, a second water conveying pipe 6 is connected between the water inlet of the first water conveying pipe 5 and the water inlet of the temporary pump 1, and valves are respectively arranged on the water suction pipe 2, the water inlet pipe 3, the water discharge pipe 4, the first water conveying pipe 5, the second water conveying pipe 6 and the ballast main pipe 7 of each ballast tank.
In order to keep the ship body balanced, ballast tanks are usually arranged on two sides of the cargo hold, namely a left side tank 8 and a right side tank 9, wherein n left side tanks 8 are arranged on the left side of the cargo hold in fig. 1, and n right side tanks 9 are arranged on the right side of the cargo hold.
Therefore, the water inlet pipe 3, the first water delivery pipe 5 and the second water delivery pipe 6 in the temporary test pipeline are arranged into a left path and a right path. One end of the left and right water inlet pipes is connected with the outlet of the temporary pump 1, the other end of the left and right water inlet pipes is connected with the corresponding first water pipe 5, the left side compartment 8 of all ballast compartments is connected with the left first water pipe, and the right side compartment 9 of all ballast compartments is connected with the right first water pipe. And one path of second water conveying pipe is connected between the first water conveying pipe on the left side and the water inlet of the temporary pump, and the other path of second water conveying pipe is connected between the first water conveying pipe on the right side and the water inlet of the temporary pump.
Install first temporary valve (V1) on the tub 2 that absorbs water, install second temporary valve (V2) on the left second raceway, install third temporary valve (V3) on the second raceway on right side, install fourth temporary valve (V4) on the left inlet tube, install fifth temporary valve (V5) on the inlet tube on right side, install sixth temporary valve (V6) on drain pipe 4.
The suction port 10 of the water suction pipe 2 is arranged in seawater or river water at the berth of a ship, or the suction port 10 of the water suction pipe 2 is connected with a wharf fire-fighting water pipe, and a filter 11 is arranged on the water suction pipe 2 for filtering impurities in the water.
Before water is added into the ballast tank, valves on the water suction pipe 2, the two water inlet pipes 3, the two first water conveying pipes 5, the two second water conveying pipes 6 and the water discharge pipe 4 are all in a closed state.
The method for testing the strength of the ballast tank of the LNG ship by adopting the strength test system of the ballast tank of the LNG ship comprises the following steps:
and S1, installing a temporary test pipeline.
Before water is added into the ballast tank, valves on the water suction pipe 2, the two water inlet pipes 3, the two first water conveying pipes 5, the two second water conveying pipes 6 and the water discharge pipe 4 are all in a closed state.
And S2, adding water into the ballast tank to be tested to the test liquid level by using the temporary pump 1, and carrying out strength test.
Specifically, as shown in fig. 2, the suction pipe 2 and the left and right inlet pipes 3 are opened, that is, the first temporary valve (V1), the fourth temporary valve (V4) and the fifth temporary valve (V5) are opened;
utilize temporary pump 1 to add water (water gets into temporary pump 1 from the pipe that absorbs water 2) to the left side cabin and the right side cabin (if first left side cabin and first right side cabin) of the ballast tank of waiting to test in step (water to get into temporary pump 1 from the delivery port of temporary pump 1 respectively, two way inlet tube 3 on the right side, through left inlet tube, left first raceway gets into the left side under-deck of the ballast tank of waiting to test, through the inlet tube on right side, the first raceway on right side gets into the right side under-deck of the ballast tank of waiting to test, when the water level in the left side cabin and the right side under-deck of the ballast tank of waiting to test all reached experimental liquid level, begin to carry out the.
And S3, opening outlet valves of the ballast tank currently tested and the ballast tank to be tested next, and enabling the water in the ballast tank currently tested to automatically flow into the ballast tank to be tested next until the liquid levels in the two tanks are equal.
And then the temporary pump 1 is used for transferring the residual water in the ballast tank of the current test to the next ballast tank to be tested for strength test.
Specifically, the specific steps of lightening the remaining water in the ballast tank to the next ballast tank are as follows:
as shown in fig. 3, the suction pipe 2 and the left water inlet pipe 3 are closed, the left second water pipe is opened, that is, the first temporary valve (V1) and the fourth temporary valve (V4) are closed, the second temporary valve (V2) is opened, and the water remaining in the left tank of the currently tested ballast tank is transferred to the right tank of the next ballast tank to be tested through the left first water pipe, the left second water pipe, the right water inlet pipe and the right first water pipe by using the temporary pump;
as shown in fig. 4, the left second water pipe and the right water inlet pipe are closed, the left water inlet pipe and the right second water pipe are opened, that is, the second temporary valve (V2) and the fifth temporary valve (V5) are closed, the fourth temporary valve (V4) and the third temporary valve (V3) are opened, and the water remaining in the right tank of the currently tested ballast tank is transferred to the left tank of the next ballast tank to be tested through the right first water pipe, the right second water pipe, the left water inlet pipe and the left first water pipe by using the temporary pump.
After the residual water in the ballast tank of the current test is transferred to the next ballast tank to be tested, if the water level in the next ballast tank to be tested does not reach the test liquid level, the left and right second water conveying pipes can be closed, the water suction pipe 2 is opened again, the left and right water inlet pipes 3 are controlled, namely, the second temporary valve (V2) and the third temporary valve (V3) are closed, the first temporary valve (V1), the fourth temporary valve (V4) and the fifth temporary valve (V5) are opened, and water is injected into the next ballast tank to be tested by using the temporary pump until the test liquid level is reached.
And S4, repeating the step S3, and sequentially testing the strength of all ballast tanks in the LNG ship.
S5, after all ballast tanks in the LNG ship are tested, closing the suction pipe 2, the water inlet pipe 3, and opening the water discharge pipe 4 and the second water pipe 6, i.e., closing the first temporary valve (V1), the fourth temporary valve (V4), and the fifth temporary valve (V5), and opening the second temporary valve (V2), the third temporary valve (V3), and the sixth temporary valve (V6), and emptying the ballast tanks with the temporary pump 1, as shown in fig. 5.
The invention is suitable for the strength test of the ballast tank of a large ship with a 6600V ballast pump.
In this embodiment, the temporary pump 1 may be a 440V shore power driven fire pump or other pump with the same displacement, and the displacement of the temporary pump is at least 10 times that of the wharf fire pump or submersible pump.
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 made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The system is suitable for a ballast tank strength test of a large ship with 6600V ballast pumps, and comprises a temporary pump, wherein a water inlet of the temporary pump is connected with a water suction pipe, a water outlet of the temporary pump is respectively connected with a water inlet pipe and a water discharge pipe, the water inlet pipe is connected with a water inlet of a first water conveying pipe, the first water conveying pipe is respectively connected with a ballast main pipe of each ballast tank, a second water conveying pipe is connected between the water inlet of the first water conveying pipe and the water inlet of the temporary pump, and valves are arranged on the water suction pipe, the water inlet pipe, the water discharge pipe, the first water conveying pipe, the second water conveying pipe and a ballast main pipe of each ballast tank.
2. The LNG ship ballast tank strength test system of claim 1, wherein the ballast tank comprises a left side tank and a right side tank,
the water inlet pipe, the first water pipe and the second water pipe in the temporary test pipeline are all set into a left path and a right path, one end of the left path water inlet pipe and one end of the right path water inlet pipe are connected to an outlet of the temporary pump, the other end of the left path water inlet pipe and the other end of the right path water inlet pipe are connected with the corresponding first water pipe, the left side cabin of all ballast tanks are connected with the left first water pipe, and the right side cabin of all ballast tanks are connected with the right first water pipe.
3. The LNG ship ballast tank strength test system according to claim 2, wherein the suction pipe is provided with a first temporary valve, the second water pipe on the left side is provided with a second temporary valve, the second water pipe on the right side is provided with a third temporary valve, the water inlet pipe on the left side is provided with a fourth temporary valve, the water inlet pipe on the right side is provided with a fifth temporary valve, and the water outlet pipe is provided with a sixth temporary valve.
4. The LNG ship ballast tank strength test system of claim 3, wherein the suction pipe is provided with a filter.
5. The LNG ship ballast tank strength test system of claim 4, wherein the suction port of the suction pipe is disposed in seawater or river water at a ship berth, or the suction port of the suction pipe is connected to a wharf fire hose.
6. The LNG ship ballast tank strength test system of claim 3, wherein the temporary pump is a 440V shore power driven fire pump or other pump with the same displacement, and the displacement of the temporary pump is at least 10 times of that of a wharf fire pump or a submersible pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010800016.6A CN112078745A (en) | 2020-08-11 | 2020-08-11 | LNG ship ballast tank strength test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010800016.6A CN112078745A (en) | 2020-08-11 | 2020-08-11 | LNG ship ballast tank strength test system |
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| CN112078745A true CN112078745A (en) | 2020-12-15 |
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| CN202010800016.6A Pending CN112078745A (en) | 2020-08-11 | 2020-08-11 | LNG ship ballast tank strength test system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112665887A (en) * | 2020-12-18 | 2021-04-16 | 上海振华重工启东海洋工程股份有限公司 | Floating body strength experiment method |
| CN113148059A (en) * | 2021-04-13 | 2021-07-23 | 上海外高桥造船有限公司 | General section strength test and insulation installation method of gas transport ship |
| CN113148060A (en) * | 2021-04-13 | 2021-07-23 | 上海外高桥造船有限公司 | Gas transport ship block strength test and insulation installation method |
| CN114455025A (en) * | 2022-03-11 | 2022-05-10 | 中交一航局第三工程有限公司 | Method for realizing water transport tank car by landing boat |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665887A (en) * | 2020-12-18 | 2021-04-16 | 上海振华重工启东海洋工程股份有限公司 | Floating body strength experiment method |
| CN113148059A (en) * | 2021-04-13 | 2021-07-23 | 上海外高桥造船有限公司 | General section strength test and insulation installation method of gas transport ship |
| CN113148060A (en) * | 2021-04-13 | 2021-07-23 | 上海外高桥造船有限公司 | Gas transport ship block strength test and insulation installation method |
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| CN114455025B (en) * | 2022-03-11 | 2023-06-20 | 中交一航局第三工程有限公司 | Method for realizing water transport tank car by landing boat |
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Application publication date: 20201215 |
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