KR102013658B1 - Pressure testing method for generator fuel oil pipe in shipyard - Google Patents

Abstract

The present invention relates to a method for testing the pressure of a fuel oil pipe of a power generator in a shipyard, which is devised to test whether a leakage has occurred in a fuel oil pipe of a power generator in a shipyard. To this end, the present invention comprises: a temporary pipe installation step of installing a temporary pipe for testing the pressure in a fuel oil pipe of a power generator in a shipyard; a filling solution injection step of injecting an anti-rust filling solution, which prevents rust even after coming in contact with an inner wall of the fuel oil pipe of the power generator, into the fuel oil pipe of the power generator to fill the same; an air-tightness testing step of testing whether the anti-rust filling solution leaks from the fuel oil pipe of the power generator which is full of the anti-rust filling solution; an anti-rust filling solution removal step of removing the anti-rust filling solution from the fuel oil pipe of the power generator; an air blowing step of blowing air into the fuel oil pipe of the power generator from which the anti-rust filling solution has been removed to remove the remaining anti-rust filling solution; and a pipe recovery step of removing the installed temporary pipe to recover the fuel oil pipe of the power generator.

Description

PRESSURE TESTING METHOD FOR GENERATOR FUEL OIL PIPE IN SHIPYARD}

The present invention relates to a generator fuel oil pipe pressure test method of a shipyard, and more particularly, to a generator fuel oil pipe pressure test method of a shipyard designed to test whether a leak occurs in the generator fuel oil pipe of the shipyard.

In general, ships have tanks containing liquid or gaseous natural resources such as oil and gas, tanks containing oil such as lubricating oil, bilge tanks, tanks storing fresh or sea water, for diving or injury. A plurality of tanks are provided for the storage of a fluid such as a tank through which air or the like is forced in and out, and the plurality of tanks are connected through a pipe. In addition, the plurality of tanks are bolted through the welding or flange connection pipes for the inflow and outflow of the fluid.

Pressure testing of the tank's tightness is carried out to check for leaks in the fluid contained in the tank as the ship is built.

That is, after the tank is sealed, the sealed (sealed or watertight) state of the tank may be tested by using air pressure or water pressure. For example, the sealed state of the tank may be tested by introducing air into the tank and setting the pressure at a constant pressure, and checking the pressure change in the tank.

The pressure test that is currently being used is performed with water, which causes serious problems of bleeding and drainage, and is also causing damage to equipment by introducing water into the marker unit.

In addition, the time and drainage to discharge water for testing is impossible, and the MGO flushing period is extended to more than 7 days to remove the water in the pipe, and the MGO used during flushing generates an amount of 5 m3 of copper. There is also a problem that must be discharged and disposed.

On the other hand, the background art described above is technical information possessed by the inventors for the derivation of the present invention or acquired in the derivation process of the present invention, and is not necessarily a publicly known technique disclosed to the general public before the application of the present invention. .

Korean Patent Publication No. 10-2013-0005809 Korean Utility Model Model No. 20-2016-0000399

One aspect of the present invention is implemented to replace the existing water with oil in the hydro test (Hydro Test) method, to perform the recovery of Hydro / blowing / Oil in one step, and to perform a pre-air test for preventing leakage Provides a method for testing the pressure of the fuel oil pipes of the shipyard's generators.

The technical problem of the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

The generator fuel oil pipe pressure test method of the shipyard according to an embodiment of the present invention, the step of installing a gas pipe for installing a pressure pipe for the pressure test in the generator fuel oil pipe (Fuel Oil Pipe) of the shipyard; A filling liquid injection step of filling the generator fuel oil piping by filling the antirusting filler liquid which prevents rust from being generated even when contacting the inner wall of the generator fuel oil piping; An airtight test step of testing for the presence of the rust preventive solution leaking from the generator fuel oil pipe filled with the rust preventive solution; A charge liquid removing step of removing the rust preventive liquid from the generator fuel oil pipe; An air blowing step of blowing air into the generator fuel oil pipe from which the anti-corrosive filling liquid has been removed to remove the remaining anti-rust filling liquid; And a pipe restoration step of recovering the generator fuel oil pipe by removing the installed pipe.

In one embodiment, the filling liquid injection step, it is possible to inject the cleaning oil (Flushing Oil) or anti-rust solution (Antirust Solution) to the generator fuel oil pipe as the anti-corrosive filling solution.

In one embodiment, after the step of installing the pipe, the pressure test may further include a pre-air outflow test step of testing whether the generator fuel oil pipe leaks through the pipe.

In one embodiment, when the cleaning oil is used as the anti-corrosive filling solution, it may further include a pipe cleanliness reading step of reading the cleanliness of the washing oil washed from the generator fuel oil pipe after the filling liquid removing step.

In an embodiment, the pipe cleanliness reading step may include a housing having an empty interior and an open top, a cover for opening and closing an upper portion of the housing, an annular plate having a predetermined width formed inside the housing, and the housing. Cleanliness including an inlet formed on one side of the upper side and a cleaning oil is introduced, a checkback mounted on one side of the plate and checking the cleanliness of the washing oil, and an outlet formed on the bottom side of the housing and outflowing the washing oil past the checkback. Check unit; A support plate is formed in the shape of a rectangular flat plate, the cleanness check unit is installed on the top; And the support plate is seated on the top, the wheels for movement is installed in each corner of the lower, cleanliness of the cleaning oil by using a cleaning oil cleanliness check device comprising a mobile shelf having a handle at the rear end for holding by the user Can be read.

In one embodiment, the movable shelf portion, forming a fastening groove in each corner portion of the upper, the support plate, the lower bar each corner portion opposite to the fastening groove to have a fastening bar for fastening to be inserted into the fastening groove. Can be.

In one embodiment, the fastening groove is formed in the form of a flat plate upright in the vertical direction is supported by an elastic body on one side of the fastening groove, the contact plate for close contact with the fastening bar in the opposite direction of the fastening groove; And a pinion gear installed at the other side of the fastening groove and engaged with a rack gear formed in a vertical direction along a side of the fastening bar as the fastening bar moves in the vertical direction.

In one embodiment, the close contact plate, the guide projection having a triangular cross section formed on the surface facing the fastening bar extends in the vertical direction, the fastening bar, the surface facing the close contact plate to the guide projection The corresponding sliding guide groove may extend in the vertical direction.

In one embodiment, the fastening groove is formed in the form of a flat plate upright in the vertical direction is fixed to be spaced apart from one side of the fastening groove, the fixing plate is formed in a row in the vertical direction in a plurality of through holes; A pressing plate disposed in a space between the fixing plate and one side of the fastening groove, the pressing plate having a plurality of push protrusions arranged in a vertical direction on a front surface through the through hole to press and fasten the fastening bar; An expansion bag disposed in a space between the pressing plate and one side of the fastening groove and expanding when the expansion liquid is supplied into the inner space to move the pressing plate in the direction of the fastening bar; A push rod that is installed at a lower side of the fastening groove and moves downward when the fastening bar moves downward along the fastening groove; And the expansion liquid is contained in a sealed inner space, and the lower portion of the push rod is disposed at an upper portion thereof, and as the push rod descends, the expansion liquid contained in the inner space is pressurized under pressure to connect the expansion bag to the expansion bag. It may include an expansion liquid supply tank supplied to.

In one embodiment, the push projection may be formed to be gradually shorter as it is located on the lower side.

According to one aspect of the present invention, in the hydro test (Hydro Test) method to replace the existing water with oils, to perform the hydro / blowing / oil recovery in one step, to perform a pre-air test for leakage prevention By implementing this function, the cause of the call can be blocked at the source, the safety measures and the rework of leakage can be prevented, and the air can be shortened.

The effects of the present invention are not limited to the above-mentioned effects, and various effects may be included within the scope apparent to those skilled in the art from the following description.

1 is a flow chart illustrating a method for testing a generator fuel oil pipe pressure in a shipyard according to an embodiment of the present invention.
2 is a view comparing the pollution generation state in the case of the existing method and the present invention.
3 is a flowchart illustrating a generator fuel oil pipe pressure test method of a shipyard according to another embodiment of the present invention.
4 and 5 are views showing the cleaning oil cleanliness check device used in the pipe cleanliness reading step of FIG.
6 is a view illustrating a cleanliness checker of FIG. 4.
7 is a view showing an embodiment of the fastening groove of FIG.
8 and 9 are views showing a connection between the fastening groove and the fastening bar.
10 is a view showing another embodiment of the fastening groove of FIG.
11 is a view showing a connection relationship between the holding plate and the pressing plate.
12 is a view for explaining the expansion step of the expansion bag.

DETAILED DESCRIPTION The following detailed description of the invention refers to the accompanying drawings that show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein may be embodied in other embodiments without departing from the spirit and scope of the invention in connection with one embodiment. In addition, it is to be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. The following detailed description, therefore, is not to be taken in a limiting sense, and the scope of the present invention, if properly described, is defined only by the appended claims, along with the full range of equivalents to which such claims are entitled. Like reference numerals in the drawings refer to the same or similar functions throughout the several aspects.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

1 is a flow chart illustrating a method for testing a generator fuel oil pipe pressure in a shipyard according to an embodiment of the present invention.

Referring to FIG. 1, in the shipyard's generator fuel oil pipe pressure test method according to an embodiment of the present invention, first, a gas pipe for a pressure test is installed in the ship's generator fuel oil pipe (S110). .

The rust preventive filling liquid which prevents rust from being generated even in contact with the inner wall of the generator fuel oil pipe is filled and filled with the generator fuel oil pipe (S120).

In one embodiment, the filling liquid injection step (S120), it is possible to inject the cleaning oil (Flushing Oil) or anti-rust solution (Antirust Solution) to the generator fuel oil pipe as the anti-corrosive filling solution.

In the case of the existing Hydro Test, the test was performed by introducing water into the pipe. As shown in the photograph of the "conventional method" of FIG. 2, 100% of the rust occurred in the pipe, and thus, the tank, the coaming, and the ship. There was a problem that pollution occurs in all areas.

In addition, after removing the contamination, the problem that the repainting of pipes and the like followed.

Accordingly, in the present invention, by using a flushing oil or an antirust solution as an anti-corrosive filling solution instead of the water causing the rusting, as shown in the photograph of the "new construction method" of FIG. Can provide the advantage of 0%, that is, 100% anti-rust performance.

In addition, it is possible to eliminate the pollution problems caused by rust preventive air shortening, it is possible to enhance the advantages that can eliminate tank finalization, process mixing and rework of the paint.

In step S130, the presence or absence of the rust preventive filler leaking from the generator fuel oil pipe filled with the rust preventive filler is tested (Hydro Test).

When the test is completed in the above-described step S130, the anti-corrosive filling liquid is removed from the generator fuel oil pipe (S140).

When the removal of the anti-corrosive filling solution is completed by the above-described step S140, air is blown into the generator fuel oil pipe from which the anti-corrosive filling liquid is removed to remove the residual anti-corrosive filling liquid (S150).

The generator fuel oil pipe is restored by removing the installed pipe (S160).

In the shipyard generator fuel oil pipe pressure test method having the steps as described above, after the gas pipe installation step (S110), the pre-air leakage test to test the air leakage of the generator fuel oil pipe through the gas pipe in the pressure test. (Pre Air Leak Test) may further include a step (S170).

In the shipyard generator fuel oil pipe pressure test method having the steps as described above, by replacing the existing water with the oil in the hydro test (Hydro Test) method, performing the recovery of hydro / blowing / oil in one step, preventing leakage By implementing the pre-air test for the user, it is possible to fundamentally block the cause of the call, prevent rework for safety measures and leakage, as well as shorten the air.

3 is a flowchart illustrating a generator fuel oil pipe pressure test method of a shipyard according to another embodiment of the present invention.

Referring to Figure 3, when the cleaning oil (Flushing Oil) is used as the anti-corrosive filling, pipe cleanliness reading step (S180) for reading the cleanliness of the washing oil washed from the generator fuel oil pipe after the filling liquid removing step (S140) It includes more.

That is, the pipe cleanliness reading step (S180), by performing the test (Hydro Test) (S130) for the presence or absence of the filling liquid described above in Figure 1 by reading the cleanliness of the tested pipe using the discharged washing oil, The purpose of this study is to obtain the results of two birds and three birds by performing Hydro Test and cleanliness test through the process of.

4 and 5 are views showing the cleaning oil cleanliness check device used in the pipe cleanliness reading step of FIG.

Referring to FIG. 4, the washing oil cleanliness checking device 10 is a device filling the inside of a pipe to perform a hydro test and easily reading the cleanliness of the washing oil discharged. , The support plate 200 and the movable shelf 300.

The cleanliness check unit 100 is a device that allows the user to visually check and read the cleanliness of the washing oil discharged after the Hydro Test, and is installed on the support plate 200.

Referring to FIG. 6, the cleanliness checker 100 includes a housing 110 having an empty interior and an open top, a cover 120 for opening and closing an upper portion of the housing 110, and an inside of the housing 110. Annular plate 130 having a predetermined width formed, the inlet 140 formed on one side of the upper end of the housing 110, the check back 150 is mounted on one surface to the plate 130 and check the cleanliness of the washing oil And an outlet 160 formed at one side of the lower end of the housing 110 and flowing out of the washing oil passing through the checkback 150.

The housing 110 may be formed in a cylindrical shape having a predetermined length and a hollow inside, and having an open upper portion. A cover 120 having a predetermined diameter may be formed at an upper portion thereof, and a checkback 150 may be mounted therein. An annular plate 130 having a predetermined width is formed so that the inlet 140 and the outlet 160 are formed on the upper and lower sides thereof.

Inlet 140 is formed on the upper side of the housing 110 is a tube in which the washing oil flows.

The outlet 160 is formed at the lower side of the side of the housing 110 and is a tube through which the washing oil passing through the checkback 150 flows out.

The checkback 150 is mounted inside the housing 110 to inspect the cleanliness of the washing oil.

A mesh 151 of a predetermined size is formed in a cylinder formed at a predetermined length in the lower side of the checkback 150. The cleaning oil introduced through the inlet 140 passes through the mesh 151, thereby cleaning the cleaning oil. The worker will be able to easily check with the naked eye.

The support plate 200 is formed in the shape of a square flat plate, and the cleanliness check unit 100 is installed at an upper portion thereof, and the support plate 200 is seated at the upper portion of the movable shelf unit 300 and moved.

Mobile shelf 300, the support plate 200 is seated on the top, the wheels for movement is installed in each corner of the lower, the user is provided with a handle for holding the rear end.

4 is a view illustrating a connection relationship between the support plate and the movable shelf of FIG. 3.

Referring to FIG. 4, the fastening groove 310 is formed at each lower edge portion of the support plate 200 facing the fastening groove 310 in the fastening groove 310 formed at each upper corner portion of the movable shelf 300. As the fastening bar 210 provided to be inserted and fastened is inserted, the supporting plate 200 may be seated on the upper part of the movable shelf 300 as shown in FIG. 5.

7 is a view showing an embodiment of the fastening groove of FIG.

Referring to FIG. 7, the fastening groove 310a according to the embodiment includes an adhesion plate 311 and a pinion gear 312.

The close contact plate 311 is formed in the form of a flat plate upright in the vertical direction and is supported by an elastic body S (for example, a spring, etc.) at one side of the fastening groove 310, and fastens the fastening bar 210. In the opposite direction, that is, in the direction of the pinion gear 312.

The pinion gear 312 is installed at the other side of the fastening groove, and also moves to the rack gear 220 formed in the vertical direction along the side of the fastening bar 210 as the fastening bar 210 moves in the vertical direction. As shown in FIG. 8, the fastening bar 210 rotates as it moves up and down in an engaged state.

In one embodiment, the pinion gear 312 is configured to be rotatably connected to both sides in the installation fastening groove (not shown in the drawing for convenience of description) formed on one side of the fastening groove 310, rotatably connected According to the degree of biting of the rotating shaft 312a (see FIG. 9), the degree of lifting or lowering of the fastening bar 210 may be adjusted.

That is, when the rotary shaft 312a is strongly bitten, the fastening bar 210 is not lifted or lowered well, and when the rotary shaft 312a is weakly bited, the fastening bar 210 can be lifted or lowered well.

Accordingly, the pinion gear 312 corresponds to a configuration for adjusting the vertical movement degree of the fastening bar 210 in the fastening groove 310.

Referring to FIG. 9, the adhesion plate 311 has a guide protrusion 319 having a triangular cross section extending in a vertical direction on a surface facing the engagement bar 210, and the engagement bar 210 is an adhesion plate 311. The sliding guide groove 230 corresponding to the guide protrusion 319 may be formed to extend in the vertical direction on the surface facing the).

Accordingly, when the fastening bar 210 is moved up or down in the fastening groove 310 in the vertical direction, the guide protrusion 319 is guided sliding in the vertical direction in the sliding guide groove 230 so that the fastening bar 210 is left and right. It may be guided to ascend or descend without shaking in the direction.

10 is a view showing another embodiment of the fastening groove of FIG.

Referring to FIG. 10, the fastening groove 310b according to another embodiment includes a fixing plate 313, a pressing plate 314, an expansion bag 315, a push rod 316, and an expansion liquid supply tank 317. do.

The fixing plate 313 is formed in the form of a flat plate upright in the vertical direction, is fixedly spaced apart from one side of the fastening groove, and a plurality of through holes 3131 are formed in a row in the vertical direction.

Referring to FIG. 11, in the fixing plate 313, a guide protrusion 3132 having a triangular cross section extends in a vertical direction on a surface opposite to the fastening bar 210, and the fastening bar 210 is a fixed plate ( The sliding guide groove 230 corresponding to the guide protrusion 3132 may be formed to extend in the vertical direction on a surface facing the 313.

The pressing plate 314 is disposed in the space between the fixing plate 313 and the expansion bag 315, and the pressing protrusion 3141 for pressing and fastening the fastening bar 210 through the through hole 3131 is provided. A plurality of rows are installed in a vertical direction on the front side, and as the expansion bag 315 is expanded, the fastening bar 3141 is moved toward the fastening bar 210 and moved through the through hole 3131 to the fastening bar 3141. 210) to lock it in place.

In one embodiment, the pressing protrusion 3141 may be formed to be gradually shorter as it is located on the lower side.

That is, as the fastening bar 210 is lowered, the moving distance of the pressing plate 314 is also increased. When the fastening bar 210 is slightly lowered, it will be pressed a little by the pressing protrusion 3141 located on the upper side. When the fastening bar 210 is lowered to the bottom end, the fastening bar 210 may be strongly fixed to the fastening groove 310b by pressing the fastening bar 210 to the push protrusion 3141 located at the lowermost side.

The expansion bag 315 is disposed in the space between the pressing plate 314 and one side of the fastening groove, and expands when the expansion liquid is supplied into the inner space to move the pressing plate 314 in the direction of the fastening bar 210. give.

That is, the expansion bag 315 is made of a sealed container such as a plastic pack that can be expanded or contracted, and the width thereof increases as the amount of the expansion liquid supplied from the expansion liquid supply tank 317 increases as illustrated in FIG. 12. The pressing plate 314 may be moved in the direction of the fastening bar 210 by expanding from t1 to t3 through t1.

The push rod 316 is installed on the lower side of the fastening groove, the upper part is exposed to the inner space of the fastening groove, the lower part is inserted into the inner space of the expansion liquid supply tank 317, and the fastening bar 210 fastens the fastening groove. As the lower side is pushed down while moving in the downward direction, the expansion liquid contained in the expansion liquid supply tank 317 is brought into close contact with the liquid contained in the syringe in close contact with the lower portion inserted into the internal space of the expansion liquid supply tank 317. It is moved to the expansion bag 315 through the connecting pipe (318).

The expansion liquid supply tank 317 performs expansion liquid in a sealed inner space, and a lower portion of the push rod 316 is disposed at an upper portion thereof, and as the push rod 316 descends, the expansion liquid contained in the inner space moves downward. Pressure is supplied to the expansion bag 315 through a connecting pipe 318 connected from the bottom to the expansion bag 315.

The fastening groove 310b having the above configuration is supported by maintaining the fastening of the fastening bar 210 by the fastening groove 310 as the fastening bar 210 is inserted into the fastening groove 310. As the support plate 200 is shaken during the movement of the cleanliness check unit 100 mounted on the upper portion of the plate 200, the support plate 200 may be effectively prevented from being separated from the movable shelf 300.

The above-described embodiments are for illustrative purposes, and those of ordinary skill in the art to which the above-described embodiments belong may easily change to other specific forms without changing the technical spirit or essential features of the above-described embodiments. I can understand. Therefore, it is to be understood that the above-described embodiments are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope to be protected by the present specification is represented by the following claims rather than the above description, and should be construed to include all changes or modifications derived from the meaning and scope of the claims and their equivalents. .

10: washing oil cleanliness check device
100: cleanliness check unit
200: support plate
210: fastening bar
300: mobile shelf
310: fastening groove

Claims (4)

A gas pipe installation step of installing a gas pipe for pressure test on the generator fuel oil pipe of the shipyard;
A filling liquid injection step of filling the generator fuel oil piping by filling the antirusting filler liquid which prevents rust from being generated even when contacting the inner wall of the generator fuel oil piping;
An airtight test step of testing for the presence of the rust preventive solution leaking from the generator fuel oil pipe filled with the rust preventive solution;
A charge liquid removing step of removing the rust preventive liquid from the generator fuel oil pipe;
An air blowing step of blowing air into the generator fuel oil pipe from which the anti-corrosive filling liquid has been removed to remove the remaining anti-rust filling liquid; And
A pipe restoration step of recovering the generator fuel oil pipe by removing the installed pipe;
The filling liquid injection step,
Injecting flushing oil or antirust solution into the generator fuel oil piping as an anti-corrosive filling solution,
After the gas pipe installation step, the pressure test comprises a pre-air leakage test step of testing whether the air leakage of the generator fuel oil pipe through the gas pipe,
When the cleaning oil is used as the anti-corrosive filling solution, after the filling liquid removing step further comprises a pipe cleanliness reading step of reading the cleanliness of the washing oil washed from the generator fuel oil pipe,
The pipe cleanliness reading step,
A housing having an empty interior and an open upper portion, a cover for opening and closing the upper portion of the housing, an annular plate having a predetermined width formed inside the housing, an inlet formed at one side of the upper end of the housing, into which washing oil flows, A cleanliness check part including a checkback mounted on one surface of the plate and checking the cleanliness of the washing oil and an outlet formed at one side of the lower end of the housing and outflowing the washing oil after the checkback; A support plate is formed in the shape of a rectangular flat plate, the cleanness check unit is installed on the top; And the support plate is seated on the top, the wheels for movement is installed in each corner of the lower, cleanliness of the cleaning oil by using a cleaning oil cleanliness check device comprising a mobile shelf having a handle at the rear end for holding by the user Read it,
The movable shelf portion, and forms a fastening groove in each corner portion of the upper,
The support plate has a fastening bar for inserting and fastening to the fastening groove in each lower corner portion facing the fastening groove, generator fuel oil pipe pressure test method of the shipyard.
delete The method of claim 1, wherein the fastening groove,
Is formed in the form of a flat plate upright in the vertical direction is supported by an elastic body on one side of the fastening groove, the contact plate for close contact with the fastening bar in the opposite direction of the fastening groove; And
It is installed on the other side of the fastening groove, and includes a pinion gear that rotates in engagement with the rack gear formed in the vertical direction along the side of the fastening bar as the fastening bar moves in the vertical direction,
The close contact plate is formed with a guide protrusion having a triangular cross section on a surface facing the fastening bar and extending in the vertical direction,
The fastening bar has a sliding guide groove corresponding to the guide projection is formed extending in the vertical direction on the surface facing the contact plate, generator fuel oil piping pressure test method of the shipyard.
The method of claim 1, wherein the fastening groove,
A fixing plate which is formed in a vertical shape upright and spaced apart from one side of the fastening groove and is fixed in a vertical direction, and has a plurality of through holes formed in a row in a vertical direction;
A pressing plate disposed in a space between the fixing plate and one side of the fastening groove, the pressing plate having a plurality of push protrusions arranged in a vertical direction on a front surface through the through hole to press and fasten the fastening bar;
An expansion bag disposed in a space between the pressing plate and one side of the fastening groove and expanding when the expansion liquid is supplied into the inner space to move the pressing plate in the direction of the fastening bar;
A push rod that is installed at a lower side of the fastening groove and moves downward when the fastening bar moves downward along the fastening groove; And
An expansion liquid is contained in a sealed inner space, and a lower portion of the push rod is disposed at an upper portion thereof. As the push rod descends, the expansion liquid contained in the inner space is pressurized to the expansion bag through a connection pipe connected to the expansion bag. Including an expansion liquid supply tank to be supplied,
The push projection is,
The lower the progressively shorter the length is formed, the generator fuel oil pipe pressure test method of the shipyard.

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