CN108181055A - The airtight testing stand of high pressure and its airtight test technology of high pressure - Google Patents
The airtight testing stand of high pressure and its airtight test technology of high pressure Download PDFInfo
- Publication number
- CN108181055A CN108181055A CN201810129615.2A CN201810129615A CN108181055A CN 108181055 A CN108181055 A CN 108181055A CN 201810129615 A CN201810129615 A CN 201810129615A CN 108181055 A CN108181055 A CN 108181055A
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- Prior art keywords
- pressure
- airtight
- high pressure
- tube road
- road system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
- G01M3/14—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/145—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for welds
Abstract
The invention discloses the airtight testing stand of high pressure and its airtight test technologies of high pressure.The airtight testing stand of high pressure includes nitrogen cylinder group and high-pressure pump.The output terminal of the nitrogen cylinder group is interconnected by the input terminal of first pipe and high-pressure pump, and the output terminal of the high-pressure pump is interconnected by second pipe and high-pressure hose, and the high-pressure hose is further external in the airtight developmental tube road system of high pressure.The airtight test technology of high pressure includes preparatory process, the test procedure and pressure release process.It checks that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon using suds, leakage point is then recorded if there is leakage phenomenon and is transferred to pressure release process, test pressure is otherwise forced into lower level.The airtight testing stand of high pressure disclosed by the invention and its airtight test technology of high pressure employ nitrogen as test(ing) medium, the residual steam in pipe-line system are avoided to influence sealing performance and causes corrosion and aging.
Description
Technical field
The invention belongs to the airtight experimental technique fields of high pressure, and in particular to a kind of airtight testing stand of high pressure and a kind of high pressure gas
Close test technology.
Background technology
In the storage of ship LNG hosts fuel and feed system, generally existing ultrahigh pressure pipeline（350 bar of design pressure
g）.Above-mentioned pipeline needs to carry out ultra high pressure experiment after installation, welding and non-destructive detection is completed（525 bar of test pressure
g）, to verify whether pipeline-weld quality is up to standard.For the pipeline of the pressure rating, existing ultra high pressure experiment uses
Clear water is as test(ing) medium.
However, there are problems for the test method.For example, ponding is difficult to thoroughly be removed after the test, pipeline is difficult
It is thoroughly dry to realize；Steam in pipeline is unfavorable to the equipment in system, is easy to corrosion and aging；Steam in pipeline can also
Influence the sealing effect of high pressure sealing pad.
Invention content
The present invention is directed to the situation of the prior art, overcomes drawbacks described above, provides the airtight testing stand of a kind of high pressure and a kind of high
It calms the anger close test technology.
The present invention includes nitrogen cylinder group and high-pressure pump using following technical scheme, the airtight testing stand of high pressure, wherein：
The output terminal of the nitrogen cylinder group is interconnected by the input terminal of first pipe and high-pressure pump, the output of the high-pressure pump
End is interconnected by second pipe and high-pressure hose, and the high-pressure hose is further external in the airtight developmental tube road system of high pressure
System；
The first pipe has been sequentially arranged shut-off valve and first pressure gauge between nitrogen cylinder group and the input terminal of high-pressure pump；
The second pipe has been sequentially arranged check valve, second pressure gauge and between the output terminal and high-pressure hose of high-pressure pump
One pressure sensor；
The second pipe is additionally provided with the first branch between first pressure sensor and high-pressure hose, the first branch and the
Two pipelines are interconnected, and the first branch is further provided with automatic pressure reducing valve；
The second pipe is additionally provided with the second branch between first pressure sensor and high-pressure hose, the second branch and the
Two pipelines are interconnected, and the second branch is further provided with hand reducing pressure valve.
According to above-mentioned technical proposal, the second branch is between the first branch and high-pressure hose.
The invention also discloses a kind of airtight test technology of high pressure, including preparatory process, the test procedure and pressure release process,
In：
The preparatory process includes the following steps：
Step S1：Temporary pipeline and blank flange are installed to form the airtight developmental tube road system of high pressure；
Step S2：It opens the safety-valve and is isolated PIT instrument；
Step S3：The second pipe of the airtight testing stand of high pressure is connected to the airtight developmental tube road system of high pressure by high-pressure hose
Filler；
The pressure release process includes the following steps：
Step V1：Automatic pressure reducing valve and hand reducing pressure valve are opened, the test pressure of the airtight developmental tube road system of high pressure is reduced to 0
bar g；
The test procedure includes the following steps：
Step T1：In the airtight developmental tube road system installation second pressure sensor of high pressure, and in second pressure sensor proximity
Camera is installed, the camera is connect with the airtight testing stand double-direction radio of high pressure；
Step T2：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 5% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T3；
Step T3：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 25% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T4；
Step T4：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 50% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T5；
Step T5：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 75% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T6；
Step T6：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 100% of limiting pressure, is adopted after 30 minutes
Check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon with suds, if there is leakage phenomenon
It then records leakage point and is transferred to step V1 and be otherwise transferred to step T7；
Step T7：Automatic pressure reducing valve and hand reducing pressure valve are opened, the test pressure of the airtight developmental tube road system of high pressure is reduced to 5
Bar g, while check that each junction of the airtight developmental tube road system of high pressure whether there is leakage phenomenon using suds, if
Leakage point is then recorded there are leakage phenomenon and is transferred to step V1 and is otherwise transferred to step V1.
According to above-mentioned technical proposal, in the preparatory process, step S4 is further included after the step S3：
Step S4：Record the specification and torque of each stud.
According to above-mentioned technical proposal, in the preparatory process, step S5 is further included after the step S4：
Step S5：Warning Sign is set around the airtight developmental tube road system of high pressure and the airtight testing stand of high pressure.
According to above-mentioned technical proposal, in the test procedure, step T8 is further included after step T7：
Step T8：Remove temporary pipeline and blank flange and closed safe valve.
According to above-mentioned technical proposal, in the test procedure, the limiting pressure is 525 Bar g.
According to above-mentioned technical proposal, in the test procedure, second pressure sensor and camera in the step T1
Quantity be 2.
The airtight testing stand of high pressure disclosed by the invention and its airtight test technology of high pressure, advantage is, using nitrogen
Gas as test(ing) medium for pipe-line system carry out ultra high pressure experiment, avoid in pipe-line system residual steam caused by
Corrosion and aging phenomenon avoid residual steam from influencing sealing performance, cleaning, the compression test under super high for efficiently completing pipe-line system.
Description of the drawings
Fig. 1 is the airtight developmental tube road system of high pressure of the preferred embodiment of the present invention and the piping diagram of the airtight testing stand of high pressure.
Fig. 2 is the partial enlarged view of piping diagram shown in Fig. 1.
Fig. 3 is the partial enlarged view of piping diagram shown in Fig. 1.
Fig. 4 is the piping diagram of the airtight testing stand of high pressure of the preferred embodiment of the present invention.
Reference numeral includes：10- nitrogen cylinder groups；20- high-pressure pumps；31- shut-off valves；32- first pressure gauges；33- check valves；
34- second pressure gauges；35- first pressure sensors；36- automatic pressure reducing valves；37- hand reducing pressure valves；41- first pipes；42-
Two pipelines；The 43- first branchs；44- the second branches；45- high-pressure hoses；51- fillers；52- second pressure sensors.
Specific embodiment
The invention discloses a kind of airtight testing stand of high pressure and a kind of airtight test technology of high pressure, with reference to preferred implementation
Example is further described the specific embodiment of the present invention.
Referring to Fig. 4 of attached drawing, with reference to Fig. 1, Fig. 4 shows the pipeline structure of the airtight testing stand of the high pressure.Preferably, institute
It states the airtight testing stand of high pressure and includes nitrogen cylinder group 10（Nitrogen source gases）With high-pressure pump 20, the output terminal of the nitrogen cylinder group 10 passes through
First pipe 41 and the input terminal of high-pressure pump 20 are interconnected, and the output terminal of the high-pressure pump 20 passes through second pipe 42 and high pressure
Hose 45 is interconnected, and the high-pressure hose 45 is further external in the airtight developmental tube road system of high pressure.
Preferably, the first pipe 41 has been sequentially arranged cut-off between the input terminal of nitrogen cylinder group 10 and high-pressure pump 20
Valve 31 and first pressure gauge 32；The second pipe 42 has been sequentially arranged between the output terminal of high-pressure pump 20 and high-pressure hose 45
Check valve 33, second pressure gauge 34 and first pressure sensor 35.
Further, the second pipe 42 is additionally provided with first between first pressure sensor 35 and high-pressure hose 45
Road 43, the first branch 43 are interconnected with second pipe 42, and the first branch 43 is further provided with automatic pressure reducing valve
36。
Further, the second pipe 42 is additionally provided with second between first pressure sensor 35 and high-pressure hose 45
Road 44, the second branch 44 are interconnected with second pipe 42, and the second branch 44 is further provided with hand reducing pressure valve
37。
Further, the second branch 44 is between the first branch 43 and high-pressure hose 45 so that hand reducing pressure valve
37 backup device as automatic pressure reducing valve 36.When loine pressure transfinite and automatic pressure reducing valve 36 is not actuated or effect of easing stress not
When sufficient, the hand reducing pressure valve 37 can act immediately, carry out pressure release instead of automatic pressure reducing valve 36 or assisted with automatic pressure reducing valve 36
Same pressure release so that loine pressure declines rapidly, avoids the occurrence of the pressure security risks such as increasing on foot.
Referring to Figure 1 of the drawings to Fig. 3, the airtight developmental tube road system of high pressure of the airtight test technology of the high pressure is respectively illustrated
System.Preferably, the airtight test technology of the high pressure includes preparatory process, the test procedure and pressure release process, wherein：
The preparatory process includes the following steps：
Step S1：Temporary pipeline and blank flange are installed to form the airtight developmental tube road system of high pressure；
Step S2：It opens the safety-valve and is isolated PIT instrument；
Step S3：The second pipe 42 of the airtight testing stand of high pressure is connected to the airtight developmental tube road system of high pressure by high-pressure hose 45
The filler 51 of system；
The pressure release process includes the following steps：
Step V1：Automatic pressure reducing valve 36 and hand reducing pressure valve 37 are opened, the test pressure of the airtight developmental tube road system of high pressure is dropped
For 0 bar g；
The test procedure includes the following steps：
Step T1：In the airtight developmental tube road system installation second pressure sensor 52 of high pressure, and in second pressure sensor 52
Installation camera nearby（It is not shown in figure）, the camera connect with the airtight testing stand double-direction radio of high pressure；
Step T2：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 5% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T3；
Step T3：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 25% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T4；
Step T4：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 50% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T5；
Step T5：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 75% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T6；
Step T6：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 100% of limiting pressure, is adopted after 30 minutes
Check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon with suds, if there is leakage phenomenon
It then records leakage point and is transferred to step V1 and be otherwise transferred to step T7；
Step T7：Automatic pressure reducing valve 36 and hand reducing pressure valve 37 are opened, the test pressure of the airtight developmental tube road system of high pressure is dropped
Each junction for 5 bar g, while the use suds inspection airtight developmental tube road system of high pressure whether there is leakage phenomenon,
Leakage point is then recorded if there is leakage phenomenon and is transferred to step V1 and is otherwise transferred to step V1.
Further, in the preparatory process, step S4 is further included after the step S3：
Step S4：Record the specification and torque of each stud.
Further, in the preparatory process, step S5 is further included after the step S4：
Step S5：Warning Sign is set around the airtight developmental tube road system of high pressure and the airtight testing stand of high pressure.
Further, in the test procedure, step T8 is further included after step T7：
Step T8：Remove temporary pipeline and blank flange and closed safe valve.
It is noted that in the test procedure, the limiting pressure is 525 Bar g；The second pressure in step T1
The quantity of force snesor 52 and camera is 2.
For a person skilled in the art, the technical solution recorded in foregoing embodiments can still be repaiied
Change or equivalent replacement is carried out to which part technical characteristic, all within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should be included in protection scope of the present invention.
Claims (8)
1. a kind of airtight testing stand of high pressure, which is characterized in that including nitrogen cylinder group and high-pressure pump, wherein：
The output terminal of the nitrogen cylinder group is interconnected by the input terminal of first pipe and high-pressure pump, the output of the high-pressure pump
End is interconnected by second pipe and high-pressure hose, and the high-pressure hose is further external in the airtight developmental tube road system of high pressure
System；
The first pipe has been sequentially arranged shut-off valve and first pressure gauge between nitrogen cylinder group and the input terminal of high-pressure pump；
The second pipe has been sequentially arranged check valve, second pressure gauge and between the output terminal and high-pressure hose of high-pressure pump
One pressure sensor；
The second pipe is additionally provided with the first branch between first pressure sensor and high-pressure hose, the first branch and the
Two pipelines are interconnected, and the first branch is further provided with automatic pressure reducing valve；
The second pipe is additionally provided with the second branch between first pressure sensor and high-pressure hose, the second branch and the
Two pipelines are interconnected, and the second branch is further provided with hand reducing pressure valve.
2. the airtight testing stand of high pressure according to claim 1, which is characterized in that the second branch be located at the first branch with
Between high-pressure hose.
3. a kind of airtight test technology of high pressure, which is characterized in that including preparatory process, the test procedure and pressure release process, wherein：
The preparatory process includes the following steps：
Step S1：Temporary pipeline and blank flange are installed to form the airtight developmental tube road system of high pressure；
Step S2：It opens the safety-valve and is isolated PIT instrument；
Step S3：The second pipe of the airtight testing stand of high pressure is connected to the airtight developmental tube road system of high pressure by high-pressure hose
Filler；
The pressure release process includes the following steps：
Step V1：Automatic pressure reducing valve and hand reducing pressure valve are opened, the test pressure of the airtight developmental tube road system of high pressure is reduced to 0
bar g；
The test procedure includes the following steps：
Step T1：In the airtight developmental tube road system installation second pressure sensor of high pressure, and in second pressure sensor proximity
Camera is installed, the camera is connect with the airtight testing stand double-direction radio of high pressure；
Step T2：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 5% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T3；
Step T3：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 25% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T4；
Step T4：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 50% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T5；
Step T5：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 75% of limiting pressure, is used after 30 minutes
Suds check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon, if there is leakage phenomenon then
It records leakage point and is transferred to step V1 and be otherwise transferred to step T6；
Step T6：The test pressure of the airtight developmental tube road system of high pressure is adjusted to the 100% of limiting pressure, is adopted after 30 minutes
Check that the weld seam of the airtight developmental tube road system of high pressure and washer whether there is leakage phenomenon with suds, if there is leakage phenomenon
It then records leakage point and is transferred to step V1 and be otherwise transferred to step T7；
Step T7：Automatic pressure reducing valve and hand reducing pressure valve are opened, the test pressure of the airtight developmental tube road system of high pressure is reduced to 5
Bar g, while check that each junction of the airtight developmental tube road system of high pressure whether there is leakage phenomenon using suds, if
Leakage point is then recorded there are leakage phenomenon and is transferred to step V1 and is otherwise transferred to step V1.
4. the airtight test technology of high pressure according to claim 3, which is characterized in that in the preparatory process, in the step
Step S4 is further included after rapid S3：
Step S4：Record the specification and torque of each stud.
5. the airtight test technology of high pressure according to claim 4, which is characterized in that in the preparatory process, in the step
Step S5 is further included after rapid S4：
Step S5：Warning Sign is set around the airtight developmental tube road system of high pressure and the airtight testing stand of high pressure.
6. the airtight test technology of high pressure according to claim 3, which is characterized in that in the test procedure, in step T7
After further include step T8：
Step T8：Remove temporary pipeline and blank flange and closed safe valve.
7. the airtight test technology of high pressure according to claim 3, is characterized in that, in the test procedure, the limit pressure
Power is 525 Bar g.
8. the airtight test technology of high pressure according to claim 3, which is characterized in that in the test procedure, the step
The quantity of second pressure sensor and camera in T1 is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129615.2A CN108181055A (en) | 2018-02-08 | 2018-02-08 | The airtight testing stand of high pressure and its airtight test technology of high pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129615.2A CN108181055A (en) | 2018-02-08 | 2018-02-08 | The airtight testing stand of high pressure and its airtight test technology of high pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108181055A true CN108181055A (en) | 2018-06-19 |
Family
ID=62552422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810129615.2A Pending CN108181055A (en) | 2018-02-08 | 2018-02-08 | The airtight testing stand of high pressure and its airtight test technology of high pressure |
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| US4601194A (en) * | 1983-01-18 | 1986-07-22 | Damco Testers, Inc. | Method and apparatus for leak testing of pipe |
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| CN107035739A (en) * | 2017-06-02 | 2017-08-11 | 中国科学院地球化学研究所 | A kind of aerodynamic device and pressure method for accurately controlling pressure |
| CN207908118U (en) * | 2018-02-08 | 2018-09-25 | 亚达管道系统股份有限公司 | The airtight testing stand of high pressure |
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