KR19990060384A - Pressure vessel internal pressure test method and device - Google Patents

Abstract

The present invention relates to a method and apparatus for performing an internal pressure test of a pressure vessel for storing high pressure gas such as LPG, oxygen, CO2, Ar, hydrogen gas, in particular, all the tests are automatically performed in a consistent line A pressure vessel internal pressure inspection method and apparatus for more specifically, the step of coupling the jig formed with a hollow portion in the pressure vessel inlet, and transfer the container to which the jig is coupled to the water supply to deliver 50-80% of water in the container Injecting the first pour step, the second pour step to fill the container after the first pour step filled with water, and the vessel passed through the second pour step to the tank tank and the internal pressure test, and the internal pressure Vacuuming the remaining water remaining in the vessel after the first draining step of transferring the inspected container to the drainage to drain the water in the container at the pressure of air That is configured to a second drain step of draining relates to a pressure-resistant pressure container inspection method according to claim.

In addition, the inspection unit is connected to the shaft fixed to both sides of the wall, the support frame transfer cylinder to move up and down along the axis and the support frame is formed so that the pressure pipe can move up and down, and the support frame in two axes A cover for fixing the upper surface of the tank tank, which is fixed and supports a jig, and has a hole formed in the center to move the pressure pipe in the center, and a slide tube is attached and slides to move up and down along the axis of the cover. A pressure pipe for supplying water of a constant pressure to a container adapted to engage with the upper end of the jig through the opening of the cover along the shangdong of the pipe, a pressure pipe transfer cylinder for shanking the pressure pipe, and the support frame A support frame transfer cylinder for supporting the fixed piece Which relates to the pressure vessel internal pressure testing device, it characterized in that it is composed of a water bath tank to the storage container to the internal pressure test.

The present invention configured as described above is designed to allow all operations to be performed automatically, and at the same time, it is possible to inspect several containers at the same time, so that many containers can be inspected in a short time.

In addition, since humans are not manually inspected, safety accidents can be reduced and gas explosions can be prevented.

Description

Pressure vessel internal pressure test method and device

The present invention relates to a method and apparatus for performing an internal pressure test of a pressure vessel for storing a high pressure gas such as LPG, oxygen, CO2, Ar, hydrogen gas, in particular, all the tests are performed automatically in a consistent line It relates to a pressure vessel internal pressure inspection method and apparatus.

Since pressure vessels use gases that pose a risk of major accidents such as explosions, regular pressure tests are conducted to check the safety of the vessels.

In the conventional pressure test method, as shown in FIG. 6, water is injected into the container, inspected, and drained by manual labor.

To explain this in detail, first put water into the container and couple the jig to the inlet of the container. Then, the tank tank lid is moved to the crane, coupled with the jig and one-touch coupling, and then the container is moved to the upper tank tank by using the crane and stored in the tank tank. When the container is stored in the tank tank, the tank lid is fixed with the clamping device and the water pressure is supplied through the hose nipple installed on the tank lid to check the internal pressure. After the predetermined internal pressure test is completed, the clamping device is released to separate the lid from the tank, and then the container associated with the lid is lifted from the tank by using a crane and transferred to a certain place. After separating the jig from the tank tank cover transferred to a certain place, remove the jig combined with the container. The pressure test is completed by draining the water in the disassembled container.

The conventional pressure-resistant inspection method is very cumbersome since all operations, that is, the operation of combining the lid and the jig, storing the container in the tank tank, and removing the lid from the tank tank, are very troublesome. The efficiency does not increase, so a large amount of inspection cannot be performed in a short time, and it is difficult to stop the position accurately with a crane, and the risk of personnel accidents is caused by a person exerting excessive force to adjust it. There was a problem. In addition, there is a problem that the risk of fire and explosion exist because the residual gas remaining in the container is discharged without any measure when injecting water into the container.

The present invention has been made in order to solve the above problems, and it is possible not only to automatically and safely inspect a large amount of containers in a short time, but also a method and apparatus for inspecting a pressure vessel that greatly reduces the risk of personnel accidents and explosions. The purpose is to provide

1 is a side perspective view of the present invention device

Figure 2 is a cross-sectional view of the jig of the present invention device

Figure 3a is a front view of the water injection portion of the present invention device, Figure 3b is a side view of the water injection portion, Figure 3c is an exploded view of the feed device of the water injection portion, Figure 3d is a configuration diagram of the feed device of the water injection portion, Figure 3e Figure 3e is a flow chart of the conveying device of the hand portion,

Figure 4a is a block diagram of the inspection unit of the present invention, Figure 4b is a front view of the inspection unit, Figure 4c is a flow chart of the inspection unit, Figure 4d is a sectional view of the pressure tube of the inspection unit,

Figure 5a is a front view of the drain portion of the present invention, Figure 5b is a side view of the drain portion, Figure 5c is a configuration diagram of the transfer device of the drain portion,

6 is a schematic view showing a conventional inspection method.

In order to achieve the above object, the present invention provides the following method and apparatus.

The pressure vessel internal pressure test method of the present invention is to couple the jig to the container inlet, and then into the container in a double piped water supply pipe, and the water-injected container in the tank tank, the internal pressure test, The container is moved to a drainage system, characterized in that drained over two times. In more detail,

Couple the tubular jig with the hollow part to the inlet of the pressure vessel, combine the double pipe type water pipe formed with the inner tube and the outer tube, and inject 50-80% of water into the vessel through the inner tube. The apparatus for automatically transporting the first filling step of discharging the water, the second filling step of injecting full water into the container poured in the first filling step with the same tips, and the container filled with water in the second filling step The pressure test step of inspecting the state of the container by using the change in the height of the water in the tank tank when the container is expanded by injecting water into the container at a pressure of 30kg through the pressure pipe using the transfer to the tank tank, and the internal pressure At the inspection stage, the finished container is transferred to the drainage part to drain the water in the container. A first drainage step of draining water into the inner tube by supplying compressed air to the second drainage step of draining the residual water which is not drained in the container in the first drainage step by using a vacuum pump attached to the drainage pipe; , Characterized in that made.

In addition, the pressure vessel internal pressure inspection apparatus of the present invention includes a jig screwed into the inlet of the container, a water injection portion for injecting water into the container, an inspection portion for internal pressure inspection of the container into which the water is injected, and water in the container after the inspection It consists of drainage drainage is characterized in that all the work is automatically performed, the detailed configuration of each part is as follows.

The jig has a screw thread formed so that the lower end can be coupled to the inlet of the container, and the inside of the jig has a tubular shape and a straight wing is formed at the upper end thereof.

The main water supply unit has a fixed frame for fixing a jig, a shandong frame and a shandong cylinder for moving the jig up and down, a left and right moving frame and a left and right moving cylinder for moving the jig left and right, and into the container through the jig. It is composed of a feed pipe for injecting water and simultaneously discharging residual gas in the container, and a feed pipe feed cylinder configured to move the feed pipe up and down.

The inspection unit includes a support frame adapted to receive and support a container in which water has been injected in the water supply unit, a tank tank cover to cover the upper surface of the tank tank, a pressure tube for supplying water of a constant pressure into the container, and a pressure tube. It consists of a pressure pipe conveying cylinder for moving up and down, and a tank for accommodating a container and performing an internal pressure test.

The drainage part is a fixed frame to receive and fix the container inspected by the inspection unit, a shanghai frame and a shanghai cylinder for moving the container, a left and right moving frame and a left and right moving cylinder for moving the container left and right, and A double pipe type drain pipe coupled with a jig for draining water in the container, and a drain pipe moving cylinder for vertically moving the drain pipe.

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

As shown in FIG. 1, the present invention is arranged in the order of water supply part (a), inspection part (b), and drainage part (c), and the parts are linked to each other so that the jig-attached container can be automatically transported and operated. .

Jig 50 is a screw thread 51 is formed at the bottom to be coupled to the inlet of the container as shown in Figure 2, the hollow portion 52 is formed so that the main and drain pipes can be moved between them. The upper blade 53 is formed in the upper portion is to be fixed to the fixed bar of the fixed frame. The jig 50 is combined with the container to transfer the container to the water supply (a), the inspection (b), the drain (d), and serves as a passage for injecting and draining water.

The water injection part a will be described.

The main water injection unit injects water into the container twice, and transfers the water-injected container to the inspection unit. As shown in FIG. 3, the water supply part includes a fixed frame, a shandong part, a left and right transport part, and a water pipe part for injecting water.

The fixed frame 4 serves as a Shanghai simultaneous axis while fixing the container and supporting the Shanghai copper frame 8. The fixing frame is provided with a plurality of fixing bars 6, 6 'and 6 "to fix the wings 53 of the jig. In addition, the guide tube 9 of the shanghai copper frame 8 is inserted in the upper corner. And a protruding guide 7 is installed so as to be movable.

The Shanghai East frame (8) of the Shanghai East part is for moving the container and has a guide tube (9) installed along the protruding guide (7) of the fixed frame and moving the left and right moving frame (16). Rail 10 for is installed and each frame is composed of a c-beam.

The shanghai copper cylinder 11 is used to shanghai the shanghai copper frame 8, and a camshaft 12 and a link 14 inserted to rotate on a fixed shaft 15 attached to each corner of the fixed frame 4. It is connected to the cam shaft 12, the cam 13 is installed to rotate the c-beam while moving the c-beam.

When the shankdong cylinder 11 operates, the link 14 moves to rotate the camshaft 12, and the cambine 13 rotates according to the rotation of the camshaft to cause the shankdong frame 8 to move.

The left and right moving frame 16 of the left and right moving parts is used to move the container forward and backward while moving on the Shanghai moving frame 8, and is equipped with a linear guide 17 which can move on the rail 10 of the Shanghai moving frame. In order to carry the jig fixed to the fixed bar (6) of the fixed frame, the transfer bar 18 made of two iron pieces facing each other is coupled to the transfer bar hanger 19 and the transfer bar ( 18, a plurality of grooves 20 are formed to fix the jig.

The left and right moving cylinder 21 is connected to the support bar 22 attached to one side of the left and right moving frame 16 and the support bar 23 attached to one side of the shanghai moving frame 8 and connected to the left and right moving frame 16. ) Serves to move the jig to the transfer bar 18 while moving on the rail 10 of the shanghai copper frame (8).

The water injection part is for injecting water into the container through the water supply pipe 25, and as shown in FIG. 3F, a peking 61 is installed at the lower end so as to be engaged or released with the upper end of the jig located in the fixed bar 6 of the fixed frame. Each water pipe is fixed to each other by a connecting bar 26, and the upper portion of the water pipe is connected to a flexible hose so that the water pipe 25 can be movable. In addition, the main water pipe is composed of a double pipe consisting of an inner pipe 62 and an outer pipe 63 so as to inject water into the inner pipe and discharge residual gas in the container to the outside.

The water injection pipe cylinder 27 of the water injection frame 30 is attached to the guide pipe 29 so as to move along the axis 28 fixed to the fixed frame and coupled with a connecting bar 26 connecting the water supply pipe. It is connected to the top. In accordance with the up and down operation of the cylinder, the water injection frame 30 moves up and down along the shaft 28, and thus the water supply pipe 25 is moved up and down, and is coupled or released with the upper end of the jig.

The inspection unit b will be described.

The inspection unit is to be transferred to the water tank tank after the end of the water supply from the water supply unit to the internal pressure inspection and to the drainage portion, as shown in Figure 4 consists of a water tank, a cover, a support frame, a pressure pipe, a transfer cylinder and the like.

The shaft 41 fixed to both side walls is installed to safely move up and down the support frame 43 supporting the container and the lid 42.

The support frame 43 has guide pipes 44 formed at both ends thereof to move along the axis 41.

Tank tank cover 42 is fixed to the support frame 43, the shaft 45 is fixed to the lower surface is attached to the fixing piece 46 for fixing the jig of the container. A hole 47 is formed in the center of the cover 42 to allow the pressure tube 48 to penetrate, and a packing is provided in the hole 47 to maintain airtightness.

The pressure pipe 48 is a pipe for supplying a constant pressure of water into the container, and moves up and down through the holes 47 of the tank tank cover 42 to engage and release the jig, and along the shaft 45. It is connected to the slide tube 49 to be moved. And each of the pressure pipes 48 is fixed to the connection bar 50 to each other to be moved at the same time.

The pressure pipe transfer cylinder 51 is fixed to the connection bar 48 connecting the pressure pipe 48 and serves to move the pressure pipe 48 up and down.

Support frame transfer cylinder 52 is coupled to the upper portion of the support frame 43 serves to transport the support frame 43 up and down.

The water tank 53 is located directly under the water tank cover 42, and is attached with a measuring device for performing an internal pressure test according to a difference in the height of water in the tank.

The drain part c is demonstrated.

As shown in FIG. 5, the drainage portion is basically the same as the main portion a and its structure and operation. However, the inner pipe through which the water passes to drain the water remaining in the bottom of the container, unlike the water supply pipe 25 of the water supply part which is configured to reach the upper end of the container as shown in FIG. 5, as shown in FIG. 5. 71 is relatively longer than the exterior 72 so as to reach the bottom of the container, and the exterior 72 through which air passes may be located at the upper end of the container, which is shorter than that of the inner tube 71. .

The secondary volleyball pipe 75 is closed in appearance and water is drained only to the inner pipe 71.

The method and operation of the present invention configured as described above will be described.

The jig 50 is coupled to the inlet of the container waiting for pressure test and then the wing 53 of the jig is placed on the fixed bar 6 formed on the fixed frame 4 of the water supply part, and the operation switch is turned on. Will start working.

When the operation switch is turned on, the left and right moving cylinder 21 is first operated, and the left and right moving frame 16 in the neutral position moves forward along the rail 16. At this time, the transfer bar 18 coupled with the left and right moving frame 16 also moves forward at the same time. The transfer bar 18 is composed of two iron pieces facing each other so that a space portion is formed between the two iron pieces, and the body of the jig can pass through the space portion. While moving forward while inserting the body of the jig into the space of the transfer bar, when the groove 20 formed on the upper surface of the transfer bar is positioned below the fixed bar 6, the forward movement of the left and right moving frame 16 is stopped.

When the left and right moving frame 16 stops, the shankdong cylinder 11 operates to rotate the camshaft 12, and the cam 13 moves up along the inner surface of the c-beam in accordance with the rotation of the camshaft. As the vertical movement frame 11 rises, the horizontal movement frame 16 positioned on the upper portion thereof also rises, and the transfer bar 18 also rises. The transfer bar is raised and stopped until the jig is completely separated from the fixed bar 6 while seating the jig 50 in the front groove 20.

When the upward movement of the shankdong frame 11 stops, the left and right moving cylinder 21 is operated again to move the transfer bar 18 to the rear, and when the jig 50 is positioned under the fixed bar 6 ', the movement is automatically performed. Stop

When the rear movement of the left and right moving cylinder 21 stops, the Shanghai moving cylinder 11 is operated again to lower the transfer bar, and the jig rests in the groove of the fixed bar 6 'and the transfer bar 18 is lowered slightly. Stop.

When the downward movement of the shank moving frame 8 stops, the left and right moving frame 16 moves again, moving the transfer bar 18 forward and stopping at the neutral position. The neutral position means the point where the groove 20 of the transfer bar stays in the intermediate position between the fixing bar 6 and 6 'and the groove 20' is between the fixing bar 6 'and 6 ". do.

When the transfer bar 18 stops at the neutral position, the main pipe cylinder 27 is operated to move downward, and the lower end of the main pipe 25 is engaged with the upper end of the jig.

When the water supply pipe 25 and the jig 50 are coupled, the valve of the water supply pipe is turned on, and the water supply proceeds through the water supply pipe inner pipe 62, and the residual gas remaining in the container is discharged to the outside through the exterior 63. . At this time, the water supply is about 50-80% in the container. The reason is that when the primary water supply is completed, the valve of the water supply pipe 25 is turned off, the water supply is stopped, and at the same time, the water supply cylinder 27 is operated so that the water supply pipe is jig. As soon as it is released, it rises and the first water phase is completed.

When the first water phase is completed, the left and right moving cylinder 21 is operated and the transfer bar 18 moves forward from the neutral position, and when the intermediate groove 20 'of the transfer bar is positioned below the fixed bar 6', The moving cylinder stops working.

When the movement of the left and right moving cylinder 21 stops, the Shanghai moving cylinder 11 is operated and the transfer bar 18 is raised, and the jig of the container having the first water-filled container is seated in the intermediate groove 20 'of the transfer bar. Rise a little and stop.

When the lifting frame 8 is stopped, the left and right moving cylinder 21 is operated to transfer the transfer bar to the rear, and when the intermediate groove of the moving bar is located at the fixed bar 6 ", the operation of the left and right moving cylinder 21 is stopped. Stop

When the rear movement of the transfer bar stops, the Shanghai Dong cylinder 11 operates to lower the transfer bar. When the transfer bar 18 descends, the jig rests on the fixed bar 6 "and the transfer bar descends a little more and stops. It stops at the neutral position while moving forward by the operation of left / right moving cylinder.

When the transfer bar is in the neutral position, the feed pipe cylinder 27 is operated while the feed pipe 25 is lowered to combine the feed pipe and the jig, and the coupling is completed, and the valve of the feed pipe is turned on to feed water into the container.

When the water supply is completed, the valve of the water supply pipe is turned off and the water supply pipe transfer cylinder 27 is operated to raise the water supply pipe 25.

As the feed pipe rises, the transfer bar 18 moves forward by the operation of the left and right cylinders 21, and the rear groove 20 " of the transfer bar is positioned under the fixed bar 6 "

When the transfer bar stops, the transfer bar rises by the operation of the upper and lower cylinders 11, and ascends a little while the jig is seated in the rear groove 20 "of the transfer bar and stops.

When the operation of the upper and lower cylinders 11 stops, the left and right cylinders 21 are operated again, and the transfer bar moves backward, and the jig seated in the rear groove 20 "of the transfer bar 18 is transferred to the inspection unit b. When the jig transferred to the position is placed on the fixing piece 46 of the inspection unit (b), the movement of the transfer bar stops, and the shanghai cylinder 11 is operated so that the jig is seated on the fixing piece 46 while the transfer bar is lowered. .

When the jig is seated on the fixing piece, the left and right moving cylinder 21 is operated again, and the transfer bar is returned to its neutral position.

This operation completes the operation of pouring water into the container.

When the transfer bar is returned to the neutral position, the pressure tube transfer cylinder 51 of the inspection unit (b) operates to engage the upper end of the jig 50 while the pressure tube 48 descends along the shaft 45.

When the pressure tube and the jig 50 are coupled, the support frame transfer cylinder 52 is operated so that the support frame 43 descends along the shaft 41. When the support frame is lowered, the container is also lowered at the same time while charged in the tank 53, the cover 42 is coupled with the upper portion of the tank tank and the lowering stops.

The water tank 53 is filled with water so that when the container is fully charged, the water level in the tank is automatically adjusted to zero point.

When the cover 42 is completed with the upper tank tank, 30 Kg pressure of water is supplied to the pressure tube 48, and the internal pressure test is started.

When the internal pressure test is completed, the process proceeds in the reverse order as described above and returns to the state where the jig is placed on the fixing piece 46. By this operation, the internal pressure test is completed.

When the inspection is completed, the transfer bar of the drain portion (C) moves forward, lifts the jig located on the fixing piece 46 of the inspection portion (b) and transports it to the rear, and again the jig on the fixed bar where the primary drain pipe of the drain portion is located. Put on and the transfer bar returns to the neutral position.

The configuration and operation of the drainage part (c) is the same as the main water supply part (a) except for the primary and secondary drainage steps.

The drainage step is described as follows.

When the jig is located in the primary drainage position, the drainage cylinder is operated to drain the drainage pipe 70. At this time, the inner pipe 71 of the primary drain pipe 70 passes through the jig to reach the bottom of the container, and the exterior 72 is configured to be located at the top of the container. When the drain pipe 70 reaches the bottom of the container and supplies compressed air to the exterior 72 of the pressure tube, the water in the container is discharged to the outside through the inner tube 71 by the pressure of the air. This operation completes the primary drainage.

The vessel in which the primary drainage operation is completed is moved back to the secondary drainage position, and the secondary drainage operation is completed by completely discharging the residual water remaining in the vessel by the vacuum suction method to the inner tube 71 of the secondary drainage pipe 75.

The water discharged from the primary and secondary drainage operations can be transferred to separate water tanks for storage and reused at the feed stage of the feed station.

As described above, the internal pressure test of the container is completed through the water supply part, the inspection part, and the drainage part, which are formed in a consistent process, and all of these operations are performed at the same time systematically by a computer program.

In addition, in the drawings of the present invention is shown as inspecting three containers may be configured to inspect one or two or more containers at the same time.

The present invention configured as described above is designed to allow all operations to be performed automatically, and at the same time, it is possible to inspect several containers at the same time, so that many containers can be inspected in a short time.

In addition, since humans are not manually inspected, safety accidents can be reduced and gas explosions can be prevented.

Claims (25)

Coupling a jig having a hollow portion to the pressure vessel inlet; A first watering step of transferring the container with the jig to the water supply unit and injecting 50-80% of water into the container; A second water filling step of filling the container through the first water filling step with water; Transferring the vessel that has undergone the second pouring step to a tank tank for internal pressure inspection; A first drainage step of transferring the vessel having the pressure resistance test to a drainage portion and draining the water in the vessel at a pressure of air; And a second drainage step of evacuating and draining the residual water remaining in the vessel having passed through the first drainage step. The method of claim 1, Wherein each step is performed by an automatic device. The method of claim 1, The jig is pressure vessel internal pressure test method, characterized in that the blade is formed on the upper end for coupling to the automatic device. The method of claim 1, Wherein the first and the second water injection step is injected into the container through a double pipe consisting of the inner tube and the external, pressure remaining pressure test method, characterized in that the gas remaining in the container while discharged to the inner tube is discharged to the external. The method of claim 4, wherein The discharge gas is pressure vessel internal pressure inspection method characterized in that the discharge to the outside through the transfer pipe. The method of claim 1, And the pressure test is performed by applying pressure to the container filled with water to change the height of the water in the tank. The method of claim 1, The first drainage step is made through a double tube consisting of an inner tube and an outer tube, the pressure vessel internal pressure test method, characterized in that the compressed air is introduced into the outer tube and the water is drained by the compressed air. The method of claim 1, And the second drainage step is drained by vacuum suction. The method according to claim 7 or 8, The drained water is transferred to a separate water tank is pressure vessel internal pressure inspection method, characterized in that to be used again in the water supply step. The method of claim 1, Wherein each step is carried out simultaneously in two or more lines. A tubular jig with a flat blade that is screwed into the inlet of the pressure vessel, Plunging unit for injecting water into the pressure vessel through the jig, An inspection unit for inspecting a container into which water is injected from the water supply unit; Pressure vessel internal pressure inspection apparatus, characterized in that consisting of a drain for discharging the water filled in the pressure vessel inspected by the inspection unit by air pressure and vacuum suction. The method of claim 11, The main water supply unit is fixed to the fixing bar for supporting the straight wing of the jig and a protruding guide is formed in each upper corner, Shanghai-dong frame is assembled with four c-beams formed at each corner to move up and down along the protruding guide of the fixed frame and two moving rails are installed across the inner surface; Located in both sides of the c-beams of the vertical movement frame and connected to one side end of the gambling shaft attached to the protrusion of the fixed frame to be rotatable to rotate the cam shaft to move the vertical movement frame up and down With up and down moving cylinder, A left and right moving frame having a linear guide mounted on the rail of the vertical moving frame to move an inner surface of the vertical moving frame, and having a transfer bar hanger having a transfer bar attached between the linear guides; A left and right moving cylinder which is connected to a bar fixed to one side of the left and right moving frame and a bar fixed to one side of the moving frame and moves the left and right moving frame from side to side; It is moved up and down between the fixing bar of the fixed frame to be detached from the upper end of the jig and the main pipe made of a double pipe so that water is injected into the inner pipe and the gas is discharged from the outside, Pressure vessel internal pressure test device, characterized in that the water pipe is connected to the water pipe is composed of a water pipe cylinder to move up and down along the axis fixed to the fixed frame. The method of claim 11, The inspection unit The shaft fixed to both side walls, A support frame which is connected to the support frame transfer cylinder to move up and down along the axis, and has a hole formed to move the pressure pipe up and down; The cover for fixing the upper surface of the tank tank is fixed to two axes on the lower surface of the support frame and a fixing piece for supporting the jig and the hole is formed in the center so that the pressure pipe can be moved up and down, A pressure pipe for supplying water of a constant pressure to the container is attached to the upper end of the jig through the hole of the cover is attached to the slide tube to move up and down along the axis of the cover; A pressure pipe transfer cylinder for moving the pressure pipes; A support frame transfer cylinder for moving the support frame up and down; Pressure vessel internal pressure inspection apparatus characterized in that the tank is configured to accommodate the vessel supported by the fixing piece to the pressure resistance test. The method of claim 11, The drain portion A fixed frame having a fixed bar for supporting the jig-shaped wings and a protruding guide formed at each upper corner thereof, Square copper shanghai frame is assembled with four c-shape formed in each corner so as to move up and down along the protruding guide of the fixed frame and two moving rails are installed across the inner surface; Located in both sides of the c-beams of the vertical movement frame and connected to one side end of the gambling shaft attached to the protrusion of the fixed frame to be rotatable to rotate the cam shaft to move the vertical movement frame up and down For shanghai copper cylinder, A left and right moving frame which is mounted on a rail of the moving frame and has a linear guide mounted to move the inner surface of the vertical moving frame, and a transfer bar hanger having a transfer bar attached between the linear guides; A left and right moving cylinder which is connected to a bar fixed to one side of the left and right moving frame and a bar fixed to one side of the moving frame to move the left and right moving frame from side to side; A primary drain pipe having an inner tube having a sufficient length to move up and down between the fixing bars of the fixing frame to reach the bottom of the container and an outer pipe having a shorter appearance than the inner tube to be combined with the upper end of the jig, and a secondary container having the exterior closed With drain pipe, Pressure vessel internal pressure test device, characterized in that consisting of a drain pipe moving cylinder which is connected to the first and second drain pipe and is moved along the axis fixed to the fixed frame. The method of claim 12, The fixed bar is composed of two bars are separated from each other so that the transfer bar is moved up and down and left and right therebetween, the pressure vessel internal pressure inspection apparatus, characterized in that the groove is formed to fix the wings of the jig. The method of claim 12, The transfer bar has a plurality of grooves for supporting the wing of the jig is formed, the pressure vessel withstand pressure test apparatus, characterized in that consists of two bars to pass through the body of the jig. The method of claim 12, The up and down moving cylinder pressure vessel internal pressure inspection apparatus, characterized in that one side is fixed to the fixed wall. The method of claim 12, The main water pipe pressure vessel internal pressure inspection apparatus, characterized in that the vertical movement on the fixed frame is moved up and down. The method of claim 12, The water supply pipe pressure vessel internal pressure inspection apparatus, characterized in that the packing is installed at the lower end to seal the inlet of the jig. The method of claim 13, The pressure vessel withstand pressure inspection device, characterized in that the packing is installed in the hole in the center of the cover to seal the pressure pipe. The method of claim 13, The fixing piece attached to the cover is a pressure vessel internal pressure inspection apparatus, characterized in that the groove is formed so that the wing of the jig is inserted and fixed. The method of claim 13, Pressure vessel internal pressure inspection apparatus characterized in that the outer ring surface portion of the cover is coupled to the sealing ring for sealing the tank tank. The method of claim 13, And the pressure tube has a length sufficient to allow engagement with the upper end of the jig in a state where the vessel is stored in the tank tank. The method of claim 14, Pressure vessel internal pressure inspection device, characterized in that the air compressor for supplying the compressed air is attached to the appearance of the primary drain pipe. The method of claim 14, Pressure vessel internal pressure inspection apparatus, characterized in that the vacuum suction pump is installed in the inner pipe of the secondary drain pipe.