CN104122042B - A kind of voltage-withstand test method of major diameter welding structure metallic conduit - Google Patents
A kind of voltage-withstand test method of major diameter welding structure metallic conduit Download PDFInfo
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- CN104122042B CN104122042B CN201410342202.4A CN201410342202A CN104122042B CN 104122042 B CN104122042 B CN 104122042B CN 201410342202 A CN201410342202 A CN 201410342202A CN 104122042 B CN104122042 B CN 104122042B
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Abstract
The present invention is a kind of voltage-withstand test method that can be used for operations involving high pressure welding structure metallic conduit.The method of the present invention is：Suppressed by water filling in the small size annular seal space between welding structure metallic conduit to be measured and built-in concentric metal tubulose part, assess the voltage endurance capability of the operations involving high pressure welding structure metallic conduit.The method that the present invention is provided reduces the axially loaded degree of two end seal plates, and then ensure that the security of sealing plate and welding structure metallic conduit connecting portion to be measured by reducing the bearing area of pipe ends sealing plate.Sealing plate and welding structure metallic conduit connecting portion to be measured be tightly connected intensity it is identical when, compared with traditional pipeline voltage-withstand test method, the present invention provide device can realize the voltage-withstand test of higher pressure in welding structure metallic conduit, while also more energy efficient, more environmentally friendly.
Description
Technical field
It is a kind of welding structure the present invention relates to carry out resistance test technical field to major diameter welding structure metallic conduit
The structure voltage-withstand test method of metallic conduit.
Background technology
Welding structure metallic conduit is a kind of conventional Transmission system component, and each is led to can be used for oil transportation, water delivery, gas transmission etc.
Domain.The voltage endurance capability and sealing of welding structure metallic conduit are the major criterions for weighing its quality of production.In order to ensure welding
Security during the pipeline military service of structural metal, according to relevant criterion, is generally formally carrying out voltage-withstand test using preceding to it.
Traditional pipeline voltage-withstand test method is：1), pipe ends are sealed using sealing plate, sealing means can use welding,
Can be realized by the way of flange coordinates with O-ring seal；2), beaten by water filling in provided pipe road direction annular seal space or gas injection
Pressure, external pressure gauge monitoring pressure in real time value；3) certain hour, is stood under the testing pressure of setting, outside observation pipe under test
Whether wall has the situation of leak or cracking, obtains its voltage endurance capability.
When pipe diameter is larger, such as when pipe diameter is more than 500mm, specific voltage-withstand test mode will be as shown in figure 1, will
Welding structure metal tube (1) is sealed with convex sealing plate (2), and exhaust outlet (3) and water inlet (4) are reserved on sealing plate (2) top,
In water inlet (4) side placement force table (5).Assuming that pipe diameter is D, test pressure is P, pressure-resistant using this kind of conventional pipelines
During method of testing, pipeline can be expressed as with the connecting portion axially loaded F of sealing plate：
F=π PD2/4
By above-mentioned formula as can be seen that when testing the voltage endurance capability of pipeline using conventional method, the company of pipeline and sealing plate
Socket part axially loaded and pipe under test diameter square are directly proportional.Therefore, when pipe diameter becomes big, the connection of pipeline and seal
Portion is often bigger than tube wall stress to be measured, and voltage-withstand test is carried out in this case, generally there is pipeline and seal connecting portion elder generation
The risk of row failure, and then cause the voltage endurance capability test crash to tube wall, or even cause security incident.
The content of the invention
A kind of security performance of present invention offer is high, and water consumption is few, and can be used for the welding structure metal tube of hydraulic pressure test high
The voltage-withstand test method in road.The technical scheme is that：
1) the smaller assistant metal tube-like piece (6) of a length is inserted in welding structure metal tube (1) inner concentric position；
2) assistant metal tube-like piece (6) one end is welded by one piece of external diameter using weld seam (10) and is more than welding structure metal tube
(1) external diameter, internal diameter and the first annular metallic plate of assistant metal tube-like piece (6) internal diameter identical (7), and by first annular metal
Plate (7) is tightly connected with welding structure metal tube (1)；
3) assistant metal tube-like piece (6) other end is welded into internal diameter of one piece of external diameter less than welding structure metal tube (1),
The metallic ring-plate (9) of opening screwed hole of the internal diameter less than assistant metal tube-like piece (6) internal diameter；
4) support reinforcing ring flat-plate (14) is installed additional inside assistant metal tube-like piece (6)；
5) the second annular metal sheet (8) is sealed using the first cushion rubber (12) and opens the metallic ring-plate (9) of screwed hole, adopted afterwards
Fastened with stud (11), steam vent (13) and inlet opening are reserved in the second annular metal sheet (8) surface；
6) annular metal sheet of sealing welding second (8) and welding structure metal tube (1), in welding structure metal tube (1) and
The annular seal space of reserved inlet opening and steam vent (13) is formd between assistant metal tube-like piece (6)；
7) by inlet opening to water filling in annular seal space, steam vent (13) discharge chamber air, air is used after draining
Welded seal or rubber sealing mode are blocked to steam vent (13)；
8) continue to be pressurizeed to water filling in inlet opening, using pressure gauge real-time monitoring, reach when standing one section after test pressure
Between, the sealing and pressure-resistant performance of observation welding structure metal tube (1).
Technique effect：
The invention provides a kind of voltage-withstand test method of welding structure metallic conduit, and there is provided the corresponding dress of the method
Put and assembling mode, with following technological merit：1st, the pressure for assuming voltage-withstand test is P, the welding structure metal of voltage-withstand test
Internal diameter of the pipeline is D, and the external diameter of assistant welding structure metallic conduit is d, then during voltage-withstand test, pipeline end face connecting portion axial direction
Stress F can be expressed as：F=π P (D2-d2)/4, with conventional test methodologies ratio, the present invention is reduced by built-in assistant metal pipe
The axially loaded degree of pipeline end face connecting portion.Also, the method provided using the present invention, for different voltage-withstand test metals
Any internal diameter D of pipe, and arbitrary test pressure P, by adjusting the outside diameter d of built-in metal pipe, welcome adjustment connection
The axially loaded F in portion, makes it in tolerance zone, therefore the present invention can be used for the higher pressure of major diameter welding structure metallic conduit
Power voltage-withstand test；2nd, the method provided according to the present invention, when voltage-withstand test welding structure metallic conduit wall thickness is more than assistant metal
During tube-like piece wall thickness, or the requirement of voltage-withstand test metal tube test pressure is higher than 10MPa, or voltage-withstand test metal tube draw ratio
During more than 3, one or more support reinforcing ring flat-plates are installed additional inside assistant metal tube-like piece, support reinforcing ring flat-plate can be great
Lift the bearing capacity of built-in assistant metal tube-like piece, it is ensured that it will not deform or fail under test pressure.
Brief description of the drawings
Fig. 1 is traditional welding structural metal pipeline voltage-withstand test schematic diagram.
Fig. 2 is welding structure metal circular tube pressure resistant testing device installation diagram of the two ends without flange-interface.
Fig. 3 is the welding structure metal circular tube pressure resistant testing device installation diagram of the flanged interface in one end.
In accompanying drawing
1 welding structure metal tube；2 convex sealing plates；
3 exhaust outlets；4 water inlets；
5 pressure gauges；6 assistant metal tube-like pieces；
7 first annular metallic plates；8 second annular metal sheets；
9 metallic ring-plates for opening screwed hole；10 weld seams；
11 studs；12 first cushion rubbers；
13 steam vents；14 support reinforcing ring flat-plates；
The flanged (FLGD) welding structure metal circular tube in 15 ends；16 bolts；
17 second cushion rubbers.
Specific embodiment：
The present invention is that a kind of security performance is high, and water consumption is few, and can be used for the welding structure metallic conduit of hydraulic pressure test high
Voltage-withstand test method, its targeted welding structure metallic conduit with diameter greater than equal to 500mm, specific embodiment party of the invention
Formula is：
Embodiment one：As shown in Fig. 2 there is no a welding structure metal tube 1 of flange for two ends, its pressure resistant testing device and
Specific implementation step is as follows：1), the smaller assistant metal pipe of a length is inserted in the inner concentric position of welding structure metal tube 1
Shape part 6；2), by the one end of assistant metal tube-like piece 6 weld one piece of external diameter more than the external diameter of welding structure metal tube 1, internal diameter with it is auxiliary
The first annular metallic plate 7 of the internal diameter identical of aided metal tube-like piece 6, its weld seam is 10, and first annular metallic plate 7 is tied with welding
The sealing welding of structure metal tube 1；3) other end of assistant metal tube-like piece 6, is welded into one piece of external diameter and is less than welding structure metal tube 1
Internal diameter, internal diameter less than the internal diameter of assistant metal tube-like piece 6 the metallic ring-plate 9 for opening screwed hole；4), when welding structure metal tube 1
When wall thickness is more than assistant metal 6 wall thickness of tube-like piece, or the requirement of the test pressure of welding structure metal tube 1 is higher than 5MPa, or is welded
When the draw ratio of binding structure metal tube 1 is more than 3, one or more support reinforcing ring flat-plates are installed additional inside assistant metal tube-like piece 6
14；5) metallic ring-plate 9 for opening screwed hole, is sealed using the second annular metal sheet 8, sealing means are after the first cushion rubber 12 is sealed
Stud 11 is fastened, and steam vent 13 and inlet opening are reserved in the surface of the second annular metal sheet 8；6), sealed using the second annular metal sheet 8
Welding structure metal tube 1, sealing means are welded seal.So far, welding structure metal tube 1 and assistant metal tube-like piece 6 it
Between form the annular seal space of reserved inlet opening and steam vent 13；7), by inlet opening to water filling in annular seal space, exhaust
Chamber air is discharged in hole 13, and air is blocked using welded seal or rubber sealing mode after draining to steam vent 13；8)、
Continue to be pressurizeed to water filling in inlet opening, using pressure gauge real-time monitoring, water inlet is blocked after reaching test pressure；9), in test
A period of time is stood under pressure, the sealing and pressure-resistant performance of pipeline are observed according to relevant criterion.
Embodiment two：As shown in figure 3, for the flanged (FLGD) welding structure metal circular tube 15 in end, its pressure resistant testing device
And specific implementation step is as follows：1), in end, the flanged (FLGD) inner concentric position of welding structure metal circular tube 15 insertion one is long
The smaller assistant metal tube-like piece 6 of degree；2) it is, that the one end of assistant metal tube-like piece 6 one piece of external diameter of welding is flanged (FLGD) more than end
The external diameter of welding structure metal circular tube 15, internal diameter and the first annular metallic plate 7 of the internal diameter identical of assistant metal tube-like piece 6, its weldering
It is 10 to stitch, and the flanged plate of first annular metallic plate 7 and the flanged (FLGD) welding structure metal circular tube 15 in end is used into cushion rubber 17
Sealing, bolt 16 is fastened；3) other end of assistant metal tube-like piece 6, is welded into one piece of external diameter and is less than the flanged (FLGD) welding in end
The internal diameter of structural metal pipe 15, the metallic ring-plate 9 of opening screwed hole of the internal diameter less than the internal diameter of assistant metal tube-like piece 6；4) end, is worked as
When the flanged (FLGD) wall thickness of welding structure metal circular tube 15 in portion is more than assistant metal 6 wall thickness of tube-like piece, or the flanged (FLGD) weldering in end
The test pressure of binding structure metal circular tube 15 requirement be higher than 5MPa, or the flanged (FLGD) welding structure metal circular tube 15 in end major diameter
During than more than 3, one or more support reinforcing ring flat-plates 14 are installed additional inside assistant metal tube-like piece 6；5), using annular metal sheet
8 sealing metal ring flat-plates 9, sealing means are that stud 11 is fastened after middle cushion rubber 12 is sealed, the reserved exhaust in the surface of annular metal sheet 8
Hole 13 and inlet opening；6), using the flanged (FLGD) welding structure metal circular tube 15 of the sealing end of the second annular metal sheet 8, sealing side
Formula is welded seal.So far, formd between the flanged (FLGD) welding structure metal circular tube 15 in end and assistant metal tube-like piece 6
Reserved inlet opening and the annular seal space of steam vent 13；7), by inlet opening to water filling in annular seal space, steam vent 13 is discharged
Chamber air, air is blocked using welded seal or rubber sealing mode after draining to steam vent 13；8), continue to entering
Water filling pressurization, using pressure gauge real-time monitoring, water inlet is blocked after reaching test pressure in water hole；9) it is, quiet under test pressure
A period of time is put, the sealing and pressure-resistant performance of pipeline are observed according to relevant criterion.
For the flanged (FLGD) voltage-withstand test welding structure metallic conduit in both sides, its pressure resistant testing device and implementation method are joined
Examining embodiment two is carried out, unique the difference is that its two end flanges side uses rubber sealing, bolt fastening.
Welding structure metallic conduit voltage-withstand test method proposed by the present invention, security is increased substantially, more energy efficient, more ring
Protect；Additionally, for the welding structure metallic conduit of major diameter, or the larger welding structure metallic conduit of length, present invention side
The device water consumption that method is related to is small, and testable pressure is higher.
Finally, protection scope of the present invention is not limited to the above embodiments.Obviously, those skilled in the art can be right
The present invention carries out various changes and deforms without deviating from scope and spirit of the present invention.If these are changed and deformation belongs to this hair
In the range of bright claim and its equivalent technologies, then the present invention is also intended to comprising these changes and deforms.
Claims (8)
1. a kind of voltage-withstand test method of major diameter welding structure metallic conduit, it is characterized in that：
Comprise the following steps：
1) the smaller assistant metal tube-like piece (6) of a length is inserted in welding structure metal tube (1) inner concentric position；
2) assistant metal tube-like piece (6) one end is welded more than welding structure metal tube (1) by one piece of external diameter using weld seam (10)
External diameter, internal diameter and the first annular metallic plate of assistant metal tube-like piece (6) internal diameter identical (7), and by first annular metallic plate (7)
It is tightly connected with welding structure metal tube (1)；
3) assistant metal tube-like piece (6) other end is welded into internal diameter of one piece of external diameter less than welding structure metal tube (1), internal diameter
Less than the metallic ring-plate (9) for opening screwed hole of assistant metal tube-like piece (6) internal diameter；
4) support reinforcing ring flat-plate (14) is installed additional inside assistant metal tube-like piece (6)；
5) the second annular metal sheet (8) is sealed using the first cushion rubber (12) and opens the metallic ring-plate (9) of screwed hole, afterwards using spiral shell
Post (11) is fastened, and steam vent (13) and inlet opening are reserved in the second annular metal sheet (8) surface；
6) annular metal sheet of sealing welding second (8) and welding structure metal tube (1), in welding structure metal tube (1) and auxiliary
The annular seal space of reserved inlet opening and steam vent (13) is formd between metallic tubular member (6)；
7) by inlet opening to water filling in annular seal space, steam vent (13) discharge chamber air, air uses welding after draining
Sealing or rubber sealing mode are blocked to steam vent (13)；
8) continue to be pressurizeed to water filling in inlet opening, using pressure gauge real-time monitoring, a period of time is stood after reaching test pressure, see
Examine the sealing and pressure-resistant performance of welding structure metal tube (1).
2. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：Using
Welding structure metal tube (1) internal diameter that the method carries out voltage-withstand test is more than or equal to 500mm.
3. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：Receive
External diameter of the internal diameter of the welding structure metal tube (1) of voltage-withstand test more than assistant metal tube-like piece (6).
4. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：Work as weldering
When binding structure metal tube (1) wall thickness is more than assistant metal tube-like piece (6) wall thickness, branch is installed additional inside assistant metal tube-like piece (6)
Support enforced loop plane (14).
5. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：Work as weldering
When the requirement of binding structure metal tube (1) test pressure is higher than 10MPa, support reinforcing ring is installed additional inside assistant metal tube-like piece (6)
Plate (14).
6. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：Work as weldering
When binding structure metal tube (1) draw ratio is more than 3, support reinforcing ring flat-plate (14) is installed additional inside assistant metal tube-like piece (6).
7. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：Welding
When (1) end is managed without flange in structural metal, its end is used with first annular metallic plate (7) and the second annular metal sheet (8)
Welded seal.
8. the voltage-withstand test method of major diameter welding structure metallic conduit according to claim 1, it is characterised in that：For
The flanged (FLGD) welding structure metal circular tube (15) in end, can configure flanged (FLGD) with end in assistant metal tube-like piece (6) end
Merging is used using bolt (16) by the second cushion rubber between the flange of the end flange matching of welding structure metal circular tube (15), two flanges
(17) seal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342202.4A CN104122042B (en) | 2014-07-18 | 2014-07-18 | A kind of voltage-withstand test method of major diameter welding structure metallic conduit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410342202.4A CN104122042B (en) | 2014-07-18 | 2014-07-18 | A kind of voltage-withstand test method of major diameter welding structure metallic conduit |
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| CN104122042A CN104122042A (en) | 2014-10-29 |
| CN104122042B true CN104122042B (en) | 2017-07-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865127A (en) * | 2015-04-07 | 2015-08-26 | 昆明理工大学 | Testing apparatus and detection method for welding strength of plastic sewer inspection pit |
| CN106442157B (en) * | 2016-12-07 | 2018-11-27 | 贵州黎阳航空动力有限公司 | A kind of experimental rig of Subarea detecting casing hydraulic pressure strength |
| CN107860661B (en) * | 2017-10-25 | 2019-12-10 | 江苏禹衡工程质量检测有限公司 | Water pressure testing device for high-pressure-resistant oil and gas pipeline |
| CN110398420B (en) * | 2019-08-19 | 2021-11-12 | 艾尔希庆华(西安)汽车有限公司 | Gas generator liquid explosion rechecking test method |
| CN112179569B (en) * | 2020-09-18 | 2021-06-15 | 中国水利水电第五工程局有限公司 | Water supply steel pipe hydrostatic test inner plugging head and plugging method thereof |
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| CN201327460Y (en) * | 2008-12-30 | 2009-10-14 | 上海锅炉厂有限公司 | Filling-up plate device for pipeline hydrotest |
| CN103558090A (en) * | 2013-11-18 | 2014-02-05 | 中建五局工业设备安装有限公司 | Water pressure testing device and method for single joint of major-diameter pressure-bearing pipeline |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130089339A (en) * | 2012-02-02 | 2013-08-12 | 대우조선해양 주식회사 | Watertight jig for testing water pressure of grp pipe, and method for testing water pressure of grp pipe using the same |
| JP5928796B2 (en) * | 2012-04-27 | 2016-06-01 | 新日鐵住金株式会社 | Steel pipe water pressure test apparatus and water pressure test method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201327460Y (en) * | 2008-12-30 | 2009-10-14 | 上海锅炉厂有限公司 | Filling-up plate device for pipeline hydrotest |
| CN103558090A (en) * | 2013-11-18 | 2014-02-05 | 中建五局工业设备安装有限公司 | Water pressure testing device and method for single joint of major-diameter pressure-bearing pipeline |
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