CN217765389U - Marine LNG gas supply system air supply pipeline segmentation pressure testing device - Google Patents
Marine LNG gas supply system air supply pipeline segmentation pressure testing device Download PDFInfo
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- CN217765389U CN217765389U CN202221942180.1U CN202221942180U CN217765389U CN 217765389 U CN217765389 U CN 217765389U CN 202221942180 U CN202221942180 U CN 202221942180U CN 217765389 U CN217765389 U CN 217765389U
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Abstract
The utility model provides a marine LNG gas supply system air supply pipeline segmentation pressure testing device, it includes the air compressor who is used for providing high pressurized air source, air compressor is linked together with the energy storage ware through main air supply hose, the intercommunication has the gas-distributing cylinder on the energy storage ware, be connected with many branch's interfaces on the gas-distributing cylinder, all be connected with branch's air supply hose on every branch's interface, the other end of branch's air supply hose links to each other with the segmentation pipeline of waiting the pressure testing, other exports of segmentation pipeline adopt the block structure to block up; the segmented pipe is completely immersed inside the tank containing water. Through the device, pressure tests can be carried out on each segment of the LNG supply system gas supply pipeline independently or together, the defect position can be found rapidly, and the safety of detection personnel is ensured.
Description
Technical Field
The utility model relates to an air supply line pressure test technical field mainly relates to marine LNG air supply system air supply line segmentation pressure testing device.
Background
The existing pressure test method for the product gas supply pipeline of the marine LNG gas supply system mainly carries out a pressure test along with the whole tank body part after the gas supply pipeline is installed, and has the following defects: 1. because the space in the cold box of the air supply system is narrow, part of welding seams are inconvenient to check when the pressure test is carried out after the air supply pipeline is integrally installed; 2. because the cold box of the gas supply system belongs to a limited space, if leakage occurs during pressure test of a pipeline system, potential safety hazards exist in the detection process of detection personnel.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a marine LNG air supply system air supply line segmentation pressure testing device can carry out pressure test alone or together to each segmentation of LNG air supply system air supply line through this device, and can discover the defective position rapidly, guarantees the testing personnel safety.
In order to realize the technical characteristics, the purpose of the utility model is realized as follows: the marine LNG gas supply system gas supply pipeline sectional pressure testing device comprises an air compressor used for providing a high-pressure gas source, wherein the air compressor is communicated with an energy accumulator through a main gas supply hose, the energy accumulator is communicated with a branch cylinder, the branch cylinder is connected with a plurality of branch interfaces, each branch interface is connected with a branch gas supply hose, the other end of each branch gas supply hose is connected with a sectional pipeline to be tested, and other outlets of the sectional pipelines are plugged by adopting plugging structures; the segmented pipe is completely immersed inside the tank containing water.
The energy accumulator support is arranged at the top of the energy accumulator base, and a drain valve is arranged on one side of the bottom of the energy accumulator; a first connecting flange used for connecting a main air supply hose is arranged on one side of the top of the energy accumulator; the top of the energy accumulator is provided with a second connecting flange for mounting the air distributing cylinder; the top end of the energy accumulator is communicated with an energy accumulator pressure gauge.
And each branch connector is provided with a stop valve, a pressure gauge and a pressure relief valve.
The blocking structure adopts a flange cover or a plug, so that only one air inlet interface is reserved for the segmented pipeline.
Lifting lugs are arranged at four corners of the top of the water tank, and a drain pipe is communicated with one side of the bottom of the water tank.
The quantity of branch interface and branch air supply hose is the same with the quantity of the segmentation pipeline of treating the pressure testing, and branch air supply hose passes through the trachea support to be fixed on the water tank.
The utility model discloses there is following beneficial effect:
1. the utility model discloses a divide the cylinder according to the demand design to fall into overall structure's air supply system into multistage segmentation pipeline originally, and then once only or carry out pressure test section by section to marine LNG air supply system air supply line, through sinking the segmentation pipeline into the aquatic, can very obviously discover to leak, guarantee experimental effect, the experimenter can remote observation, and judge whether the pipeline has the leakage, guaranteed personnel's safety.
2. The energy accumulator can be used for storing high-pressure gas, so that the subsequent pressurization of the segmented pipeline is facilitated. The sewage inside the energy accumulator can be discharged regularly through the blowoff valve, and the pressure inside the energy accumulator can be accurately controlled through the pressure gauge of the energy accumulator.
3. The stop valve can be used for controlling the supply of high-pressure gas inside the branch interface, and the pressure gauge can be used for controlling the pressure of the supplied gas. The pressure relief valve can be used for controlling the pressure relief of the pipeline.
4. Can be used for providing the water environment in the test process through foretell water tank, be convenient for through the lug moreover to the transport and the removal of water tank, can realize the drainage through the drain pipe.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a front view of the present invention.
Fig. 2 is a partial view of the accumulator of fig. 1 according to the present invention.
Fig. 3 is a top view of the present invention.
Fig. 4 is a partial view of the branch air supply hose of fig. 3 according to the present invention.
In the figure: the device comprises an air compressor 1, a main air supply hose 2, a first connecting flange 3, an energy accumulator base 4, an energy accumulator 5, a blow-down valve 6, a second connecting flange 7, an energy accumulator pressure gauge 8, a branch cylinder 9, a branch connector 10, a stop valve 11, a pressure gauge 12, a pressure release valve 13, a branch air supply hose 14, a lifting lug 15, a water tank 16, a segmented pipeline 17, a flange cover 18, a plug 19, a drain pipe 20 and a gas pipe support 21.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
Example 1:
referring to fig. 1-4, the marine LNG gas supply system gas supply pipeline sectional pressure test device comprises an air compressor 1 for providing a high-pressure gas source, wherein the air compressor 1 is communicated with an energy accumulator 5 through a main gas supply hose 2, the energy accumulator 5 is communicated with a branch cylinder 9, the branch cylinder 9 is connected with a plurality of branch interfaces 10, each branch interface 10 is connected with a branch gas supply hose 14, the other end of each branch gas supply hose 14 is connected with a sectional pipeline 17 to be tested, and other outlets of the sectional pipeline 17 are plugged by adopting a plugging structure; the segmented pipe 17 is completely immersed inside the water tank 16 containing water. By adopting the pressure test device, the gas supply pipeline of the marine LNG supply system can be subjected to sectional pressure test, the traditional process of integral pressure test after assembly is avoided, and the safety of the pressure test process is ensured while the pressure test efficiency is improved.
Further, the energy accumulator 5 is supported and installed at the top of the energy accumulator base 4, and a drain valve 6 is installed at one side of the bottom of the energy accumulator 5; a first connecting flange 3 for connecting the main air supply hose 2 is arranged on one side of the top of the energy accumulator 5; the top of the energy accumulator 5 is provided with a second connecting flange 7 for mounting a sub-cylinder 9; the top end of the energy accumulator 5 is communicated with an energy accumulator pressure gauge 8. The above-described energy accumulator 5 can be used to store high-pressure gas, which in turn facilitates the subsequent pressurization of the segment line 17. The sewage inside the energy accumulator 5 can be discharged regularly through the blowoff valve 6, and the pressure inside the energy accumulator can be accurately controlled through the energy accumulator pressure gauge 8.
Furthermore, each branch connector 10 is provided with a stop valve 11, a pressure gauge 12 and a pressure relief valve 13. The shutoff valve 11 can be used to control the supply of high-pressure gas inside the branch connection port 10, and the pressure gauge 12 can be used to control the pressure of the supplied gas. The pressure relief valve 13 can be used to control the pressure relief of the line.
Furthermore, the blocking structure adopts a flange cover 18 or a plug 19, so that only one air inlet interface is reserved in the segmented pipeline 17. Through the plugging structure, the outlet of the segmented pipeline 17 to be tested can be plugged effectively according to specific plugging requirements.
Furthermore, lifting lugs 15 are arranged at four corners of the top of the water tank 16, and a drain pipe 20 is communicated with one side of the bottom of the water tank 16. The water tank 16 can be used for providing a water environment during a test, the lifting lugs 15 are used for facilitating the carrying and moving of the water tank 16, and the water drainage can be realized through the water drainage pipe 20.
Furthermore, the number of the branch connectors 10 and the branch air supply hoses 14 is the same as that of the segmented pipelines 17 to be tested, and the branch air supply hoses 14 are fixed on the water tank 16 through the air pipe bracket 21. The secure attachment of the branch air supply hose 14 to the water tank 16 is ensured by the air tube support 21 described above.
Example 2:
the method for carrying out pressure test on the gas supply pipeline of the LNG gas supply system by adopting the sectional pressure test device for the gas supply pipeline of the marine LNG gas supply system comprises the following steps:
taking 30m for ship LNG gas supply system gas supply line pressure testing for example, can divide 30m for ship LNG gas supply system into 11 sections of segmentation pipeline.
Step one, splitting an LNG supply system:
splitting an air supply pipeline of the whole air supply system into 11 sections of segmented pipelines 17 according to the structure of the air supply pipeline of the marine LNG air supply system;
step two, the pipeline connection of the pressure testing device:
an air compressor 1 is connected with an upper energy accumulator 5 through a pressure-resistant main air supply hose 2, a branch cylinder 9 is installed on the energy accumulator 5, the branch cylinder 9 is designed into 11 branch connectors 10 with the same number as the number of the branch connectors according to the number of segmented pipelines 17 to be tested, and each branch connector 10 is provided with an independent stop valve 11, a pressure gauge 12 and a pressure release valve 13;
step three, plugging and installing the segmented pipeline 17:
plugging redundant pipe orifices of each segmented pipeline 17 needing pressure testing by using a plugging structure, only reserving one air inlet interface, connecting each segmented pipeline 17 needing pressure testing with a branch interface 10 by using a pressure-resistant branch air supply hose 14, and supporting and fixing each branch air supply hose 14 by using an air pipe support 21;
step four, pre-pressurizing the segmented pipeline 17:
after the pipeline 17 to be segmented is communicated with the branch cylinder by using the branch air supply hose 14, the pressure of 0.2MPa is applied to the pipeline; water can be prevented from entering the test pipeline when the pipeline has defects through pre-pressurization;
step five, performing a pressurization and air tightness test on the segmented pipeline 17:
the method comprises the steps that segmented pipelines 17 with the pressure of 0.2Mpa are sunk into a water tank 16 one by one, the liquid level in the water tank 16 must be higher than the segmented pipelines 17, whether bubbles are emitted in the water tank 16 or not is observed, if no bubbles are continuously emitted, a stop valve 11 is slowly opened to apply pressure to the segmented pipelines 17, the pressure is slowly increased to 10% of the specified test pressure during pressure test, the pressure is maintained for 5min, and the phenomena of continuous emission of bubbles and pressure drop of a pressure gauge cannot occur in the pressure applying and maintaining processes;
after the initial detection is qualified, continuously pressurizing to 50% of the specified test pressure, if no abnormal phenomenon exists, then gradually increasing the pressure according to 10% of the specified test pressure until the test pressure, maintaining the pressure for 10min, then reducing the pressure to the design pressure, and maintaining the pressure for enough time to perform leakage detection again;
the test pressure should be kept constant during the examination and should not be maintained by continuous pressurization.
Step six, taking out the segmented pipeline 17 by pressure relief:
and the specific operation process of the sixth step is that the pressure release valve 13 can be opened to release the internal pressure of the segmented pipeline 17 after the air pressure test is finished, the segmented pipeline 17 and the branch hose 14 can be lifted out of the water tank 16 when the pressure is released to 0.2MPa, the pressure is released again, and the connecting pieces are detached after the pipeline has no pressure.
Step seven, drying and cleaning the sectional pipeline 17:
after the air pressure test is qualified, thoroughly blowing and cleaning dirt in the sectional pipeline 17 by using dry and clean nitrogen with the dew point lower than-25 ℃, and checking by using clean white cloth at an exhaust end, wherein the condition that no rust, dustiness, moisture or dirt exists within 10min can be regarded as qualified;
when the segmented pipeline 17 is purged, the pipe bottom, the welding line and the dead angle are tapped by the hand hammer, the pipeline is not damaged, the operation of influencing the cleaning in the pipe cannot be carried out after the purging is qualified, and otherwise, the purging is required to be carried out again.
Step eight, assembling and checking the segmented pipeline 17:
after the pipelines are completely assembled and qualified through inspection, the pipelines and pipeline accessories are also required to be blown and swept by dry and clean air.
Claims (6)
1. Marine LNG gas supply system air supply line segmentation pressure testing device, its characterized in that: the device comprises an air compressor (1) for providing a high-pressure air source, wherein the air compressor (1) is communicated with an energy accumulator (5) through a main air supply hose (2), the energy accumulator (5) is communicated with an air distribution cylinder (9), the air distribution cylinder (9) is connected with a plurality of branch interfaces (10), each branch interface (10) is connected with a branch air supply hose (14), the other end of each branch air supply hose (14) is connected with a segmented pipeline (17) to be tested, and other outlets of the segmented pipeline (17) are plugged by adopting a plugging structure; the sectional line (17) is completely immersed inside the tank (16) containing water.
2. The marine LNG supply system gas supply pipe segment pressure testing device of claim 1, wherein: the energy accumulator (5) is supported and installed at the top of the energy accumulator base (4), and a drain valve (6) is installed on one side of the bottom of the energy accumulator (5); a first connecting flange (3) used for connecting the main air supply hose (2) is installed on one side of the top of the energy accumulator (5); the top of the energy accumulator (5) is provided with a second connecting flange (7) for mounting the air distributing cylinder (9); the top end of the energy accumulator (5) is communicated with an energy accumulator pressure gauge (8).
3. The marine LNG supply system gas supply pipe segment pressure testing device of claim 1, wherein: each branch interface (10) is provided with a stop valve (11), a pressure gauge (12) and a pressure release valve (13).
4. The marine LNG supply system gas supply pipe segment pressure testing device of claim 1, wherein: the blocking structure adopts a flange cover (18) or a plug (19), so that only one air inlet interface is reserved in the segmented pipeline (17).
5. The marine LNG supply system gas supply pipe segment pressure testing device of claim 1, wherein: lifting lugs (15) are arranged at four corners of the top of the water tank (16), and a drain pipe (20) is communicated with one side of the bottom of the water tank (16).
6. The marine LNG supply system gas supply pipe segment pressure testing device of claim 1, wherein: the quantity of branch interface (10) and branch air supply hose (14) is the same with the quantity of the segmentation pipeline (17) of waiting the pressure testing, and branch air supply hose (14) pass through tracheal stent (21) to be fixed on water tank (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221942180.1U CN217765389U (en) | 2022-07-26 | 2022-07-26 | Marine LNG gas supply system air supply pipeline segmentation pressure testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221942180.1U CN217765389U (en) | 2022-07-26 | 2022-07-26 | Marine LNG gas supply system air supply pipeline segmentation pressure testing device |
Publications (1)
| Publication Number | Publication Date |
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| CN217765389U true CN217765389U (en) | 2022-11-08 |
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| CN202221942180.1U Active CN217765389U (en) | 2022-07-26 | 2022-07-26 | Marine LNG gas supply system air supply pipeline segmentation pressure testing device |
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| CN (1) | CN217765389U (en) |
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2022
- 2022-07-26 CN CN202221942180.1U patent/CN217765389U/en active Active
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