KR101895419B1 - Water pressure test method of the ocean equipment used the hyperbaric chamber - Google Patents

Abstract

The present invention relates to a hydraulic test method of marine equipment by using a hyperbaric chamber, and a main objective of the present invention is to provide an effective test method for an underwater pressure resistance test of a ship structure sample, and to provide a test method which is a standard for performing the underwater pressure resistance test on a device or a structural facility used underwater in relation to ships, offshore structures, and related equipment. According to the present invention provided for the above objective, the hydraulic test method of the marine equipment by using the hyperbaric chamber includes: an inspection step of inspecting a state of a ship structure sample and test equipment in advance; an input step of fixing the specimen and an observation device, which have been inspected in the inspection step, to a fixed platform and inputting the fixed platform into the hyperbaric chamber of the test equipment; a test step of applying a preset pressure to the sample inputted together with the fixed platform in the input step within a preset time to check a physical change; and a test end step of releasing the preset pressure when the preset time is reached in the test step and simultaneously discharging water. Accordingly, an effective test method for an underwater high-pressure test of the ship structure sample is provided, and the test method which is the standard for performing the underwater pressure resistance test on the device or the structural facility used underwater in relation to the ships, the offshore structures, and the related equipment is provided.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water pressure test method for a marine equipment using a high-pressure chamber,

The present invention relates to a high-pressure test method, and more particularly, to a method and apparatus for high-pressure testing, and more particularly, to a method for testing a high- The present invention relates to a hydraulic test method of a marine equipment using a high-pressure chamber capable of testing changes.

In general, important components (electronic, mechanical parts) (hereinafter referred to as "marine equipment ") of various systems (underwater / unmanned submersibles, underwater sensors, etc.) It is designed and manufactured considering the structural strength to withstand the pressure corresponding to the used water depth.

 However, due to various causes that may arise during the fabrication and assembly process, the marine equipment can not withstand the pressure of the water depth, and the structure is deformed or the joint part is defected.

In the event of leaks, it is very important to evaluate the pressure resistance in advance, since most components in the marine equipment will not be able to operate normally and will seriously affect the operation of the entire underwater system.

In addition to the leakage phenomenon described above, high-pressure chamber testing facilities are used for performance tests and safety evaluations of pressure-resistant structures such as internal pressure buckling strength, internal pressure fatigue strength, internal pressure test test evaluation or other special purpose test, or marine equipment.

At this time, the operation pressure of the high-pressure chamber testing equipment reaches a maximum of 600 bar, which corresponds to the pressure at a depth of 6,000 m.

And, as described above, the test is carried out under operating pressure operated at a high pressure of up to 600 bar. In this test, it is observed whether the specimen such as pressure-resistant structure or underwater operation equipment breaks or deforms at a certain pressure.

However, when the marine equipments are broken especially under high pressure operating conditions as described above, the high pressure chamber is damaged by a large number of fragments, or the water supply / drainage pipes are blocked, The water used does not drain or the rate of pressure increase remarkably decreases, and the high-pressure chamber can not be used again so that the test can not be performed.

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the conventional problems as described above, and it is an object of the present invention to prevent damage by monitoring physical changes of marine equipments in real time during an underwater pressure test.

Another object of the present invention is to propose a method of validation in water pressure test of marine equipment.

It is a further object of the present invention to provide a method and apparatus for obtaining all the marine equipment for ships, marine structures and related equipment in water to determine whether marine equipment or structural equipment used in water is deformed or leaky And to ascertain to what extent the internal pressure acts.

Furthermore, another object of the present invention is to present as a standard for conducting an underwater pressure test on equipment or structural equipment used in water in relation to ships, offshore structures and related equipment.

According to the present invention, there is provided a hydraulic test method for a marine equipment using a high-pressure chamber,

An inspection step of checking the condition of the ship structure marine equipment and the test equipment in advance;

An input step of fixing the marine equipment and the observation means, which have been inspected in the inspection step, to a fixed platform and then putting the marine equipment and the observation means into a high pressure chamber of the test equipment;

A test step of checking the physical change by applying a set pressure to the marine equipment put in together with the fixed platform in the input step;

And terminating the test in which the set pressure is released when the time set in the test step is reached and the drainage is performed.

Further, in the hydraulic test method of marine equipment using the high-pressure chamber,

A visual observation step of separating the marine equipment from the fixed platform on which the test has been completed at the end of the test, and then checking physical changes after completion of the test;

And a test report step of recording the result of the visual observation step and the checked marine equipment.

In addition,

And a water supply step of supplying test water into the high-pressure chamber.

Further, in the test step,

And a real-time observation step of observing a physical change of the marine equipment due to the water pressure being pressurized through the image transmitted through the observation unit.

Further, in the test step,

The set time can be confirmed by the timer, and the set pressure can be confirmed by the pressure gauge.

Further, in the test step,

It is composed of general test or repeated test.

Further, in the general test,

A first step of pressurizing with a pressure set by the pump;

A second step in which the pressurized pressure in the first step is maintained by a timer for a set time;

And a third step in which the pressure is reduced and drained when the time set in the second step is reached, and the test is terminated.

Further, in the above repetitive test,

A first step of pressurizing the interior of the high-pressure chamber at a pressure set by the pump;

A second step in which the pressurized pressure in the first step is maintained by a timer for a set time;

A third step of reducing pressure to release the pressure applied in the first step;

A fourth step of re-pressurizing the interior of the high-pressure chamber which has been released and decompressed in the third step to a predetermined pressure;

A fifth step in which the pressurized pressure in the fourth step is maintained by a timer for a set time;

And a sixth step of releasing the pressure applied in the fifth step and terminating the test.

As described in detail above, according to the hydraulic test method of the marine equipment using the high-pressure chamber according to the present invention, it is possible to monitor the physical change amount of the sample for the ship structure during the pressure test to prevent the breakage of the sample in advance And it is also effective to provide an effective test method in the water pressure resistance test.

In addition, all marine equipment for ships, offshore structures and related equipment is supplied to the water to confirm whether abnormalities such as deformation and leakage occur at the water pressure required for equipment or structural equipment used in water, It is possible to confirm whether or not the operation of the system is effective.

Furthermore, there is an effect to be a standard for carrying out underwater pressure test on equipment or structural equipment used in water in relation to ships, offshore structures and related equipment.

1 is a diagram showing the overall configuration of an internal pressure test apparatus used in a hydraulic test method of marine equipment using a high-pressure chamber according to the present invention,
FIG. 2 is a process diagram for explaining a hydraulic test method of a marine equipment using a high-pressure chamber according to the present invention,
Fig. 3 is a flow chart showing the steps of the general test step and the repetitive test step in the test process according to the present invention.

The configuration of the test equipment (1) used in the test method (S10) will be briefly described before explaining the hydrostatic test method (S10) of the marine equipment using the high-pressure chamber according to the present invention.

1, the test equipment 1 includes a high-pressure chamber 10, a pressurizing means 20, a pressure measuring means 30, a controller 40, a piping system 50 and an observation means 60 .

The high-pressure chamber 10 has a structure capable of withstanding a test pressure of 60,000 kPa at maximum in the test method (S10) according to the present invention, and has a structure satisfying a pressing speed of 1 to 10,000 kPa / min. And a fixed platform 15 is provided so that it can be used in the following operation.

The pressurizing means 20 is provided to supply the test water in the water storage tank 51 of the piping system 50 to the high pressure chamber 10 and simultaneously pressurize the high pressure chamber 10 with a desired pressure. Any one of the electric pumps may be selectively applied.

The pressure measuring means 30 is a pressure measuring device 31 for detecting a pressure change in the high-pressure chamber 10 and outputting the detected pressure change.

Since the controller 40 is a PLC 41 and the PLC 41 has a programmed conversion algorithm built in, all the operations of the test equipment 1 are performed through the PLC 41 described above. If only a few conditions related to the operation are inputted for control, the operation of the test equipment 1 and all operations related to the pressurization and depressurization are automatically performed according to the procedure pre-programmed in the PLC 41 based on this.

The piping system 50 is configured to enable the test water to flow in and out of the high-pressure chamber 10 from the water storage tank 51 as a starting point.

Further, at least one observation means 60 is provided in the high-pressure chamber 10 so as to be capable of observing physical changes occurring in the sample during buckling test, that is, buckling, leakage, and failure.

 2, a hydrostatic test method S10 (hereinafter referred to as a "test method") of a marine equipments using a high-pressure chamber according to the present invention comprises a checking step S100, an input step S200, Step S300, test termination step S400, visual observation step S500, and test report step S600.

The inspection step (S100) is a step of checking the condition of the marine equipment (2) in advance, and it is determined whether the marine equipment (2) is suitable for carrying out the test, the appearance and connection parts and bolt fastening parts, (S100), checking the internal state of the sample and checking whether there is any unhealthy part or unhealthy part of each part of the test equipment (1). In this inspection step (S100) Inspect.

The injecting step S200 is a step of fixing the marine equipment 2 and the observing means 60 which have been inspected visually in the inspection step S100 to the fixed platform 15, (10), the marine equipment (2) fixed to the fixed platform (15) is fixed by using a rope, a cable tie, an adhesive tape or the like.

At this time, care must be taken to prevent damage to the specimen, the specimen should be fixed so that it does not float by buoyancy, and the area of interest should be fixed to facilitate observation.

The observation means 60 is preferably a camera, a light, and is preferably installed to facilitate observation of a region of interest of the marine equipment 2.

Further, after the fixed platform 15 is elevated using a crane, the dust at the bottom of the fixed platform 15 is removed, and then the crane is installed inside the high-pressure chamber 10 using a crane.

Subsequently, a water supply step (S210) for closing the inlet port of the high-pressure chamber (10) and filling test water into the high-pressure chamber (10) is continued. When the water supply step (S210) is completed, the test equipment ), The internal temperature and humidity of the test room are recorded, and the input step (S200) is completed when there is a final safety confirmation signal from the hardware personnel.

When the introduction of the sample 2 together with the fixed platform 15 is completed in the applying step S200, a test step S300 is performed to check the physical change by applying the set pressure within the set time.

In the test step S300, the software person in charge presses the start button of the timer 11 and instructs the hardware person in charge to pressurize.

The hardware representative who has received the pressure instruction gradually increases the pressure to the prescribed test pressure, confirming that there is no abnormality in the marine equipment 2 through the observation means 60 inside the high-pressure chamber 10.

When the specified test pressure is reached, the internal observation screen of the high-pressure chamber (10) is photographed, pressurized to the specified test pressure, and then the pressure is maintained for 30 minutes (or as otherwise specified in the test plan).

In this way, the state of the marine equipment 2, that is, the state of the marine equipment 2, which is transmitted to an external monitor (not shown) through the observing means 60 for observing the inside of the high-pressure chamber 10 during the pressure sustaining time, In the real-time observation step S301.

At this time, if breakage and leakage of the sample are found, that is, if the pressure of 260 kPa or more is depressurized at the test pressure for the duration, the test is stopped.

On the contrary, if there is no change in the pressure that persists, if it continues for the set time, it is determined that there is no abnormality, and the flow goes to the end of the test (S400).

In the test termination step S400, the pressure inside the high-pressure chamber 10 under high pressure is gradually reduced to the atmospheric pressure, then the cover of the high-pressure chamber 10 is opened and the fixing platform 15 is taken out to the outside. Separates the marine equipment (2) from the fixed platform (15) and removes moisture outside the marine equipment (2).

Thus, when the withstand pressure test is completed, a visual observation step S500 of inspecting the appearance of the marine equipment 2 having undergone the above-mentioned pressure-resistance test is performed.

The visual observation step (S500) is a matter to be checked after the internal pressure test. After taking a photograph of the sample, the deformation state outside the marine equipment (2) is visually inspected to judge buckling and destruction, The state is checked to judge whether or not to leak.

If necessary, the test report step S600 is completed after the preparation of the test report recording the result of performing the function check on the sample, and the water pressure test of the marine equipment 2 according to the present invention is completed .

The test step S300 is performed either in the general test step S310 or in the repeated test step S330. The test procedure is applied according to the customer's requirements and related standards, If there is no bar, the general test step (S310) is applied. If the repeated test is required as in the ABS standard, the repeat test step (S330) is applied.

The general test step S310 is composed of steps 1, 2 and 3 (S311) (S312) (S313). The first step S311 is a step of pressurizing with the pressure set by the above- The second step S312 is a step in which the pressurized pressure in the first step S311 is maintained by the timer 11 for the set time.

The third step S313 is a step in which the pressure is reduced and drained when the set time is reached in the second step S312, and the test is terminated.

Meanwhile, the repetitive testing step S330 includes the first through sixth steps S331, S332, S333, S334, S335, and S336. The first through third steps S331, The process up to step S333 is the same as the general test step S310 except that the processes such as the pressurization, the duration and the depressurization are repeated again through the fourth through sixth steps S334, S335, and S336, It is a process that demonstrates the stability of marine equipment (2).

As described in detail above, according to the hydraulic test method of the marine equipment using the high-pressure chamber according to the present invention, it is possible to monitor the physical change amount of the marine equipment in the high-pressure chamber in various ways, And the effective test method in the water pressure test is proposed.

In addition, all marine equipment for ships, offshore structures and related equipment is supplied to the water to confirm whether abnormalities such as deformation and leakage occur at the water pressure required for equipment or structural equipment used in water, Can be confirmed.

In addition, standards have been established for underwater pressure testing of equipment and structural equipment used in water in relation to ships, offshore structures and related equipment.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. ≪ / RTI >

S10: Hydraulic test method S100: Inspection step
S200: input step S210: water supply step
S200: input step S300: test step
S301: Real-time observation step S310: General test
S330: Repeat test S400: Test end step
S500: Visual observation method S600: Test report step

Claims (8)

An inspection step of checking the condition of the ship structure marine equipment and the test equipment in advance;
An input step of fixing the sample of the marine equipment and the observation means, which have been inspected in the inspection step, to a fixed platform and then putting the sample into the high pressure chamber of the test equipment;
A test step of applying a set pressure to the sample put in with the fixed platform in the loading step and checking the physical change;
And a test end step of withdrawing the sample and the fixing platform from the high-pressure chamber after the testing step,
In the testing step,
The set time can be confirmed by the timer, the set pressure can be confirmed by the pressure measuring device,
A first step of pressurizing the inside of the high-pressure chamber with the set pressure by a pump;
A second step in which the pressurized pressure in the first step is maintained for a set time by the timer;
A third step of reducing pressure so that the pressure applied in the first step is released;
A fourth step of re-pressurizing the pressure inside the high-pressure chamber, which has been reduced in the third step, to a predetermined pressure;
A fifth step in which the pressurized pressure in the fourth step is maintained for a time set by the timer;
And a sixth step of releasing the pressure applied in the fifth step and terminating the test,
The second step or the fifth step may include:
Wherein the test step is terminated when the internal pressure of the high-pressure chamber confirmed by the pressure gauge is lower than the predetermined pressure.
The method according to claim 1,
A visual observation step of separating a sample from the fixed platform, which has been tested in the test termination step, and then checking a physical change of the sample; And
And a test reporting step of recording results of the inspected samples on the visual observation step.
The method according to claim 1,
Wherein,
And a water supply step of supplying test water into the high-pressure chamber.
The method according to claim 1,
In the testing step,
Further comprising a real-time observation step of observing a physical change of the sample due to the pressure applied through the image transmitted through the observation unit. delete delete delete delete

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