CN103353427A - Internal pressure-flattening load testing apparatus for polyolefin pipe and polyolefin composite pipe - Google Patents
Internal pressure-flattening load testing apparatus for polyolefin pipe and polyolefin composite pipe Download PDFInfo
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- CN103353427A CN103353427A CN2013102728165A CN201310272816A CN103353427A CN 103353427 A CN103353427 A CN 103353427A CN 2013102728165 A CN2013102728165 A CN 2013102728165A CN 201310272816 A CN201310272816 A CN 201310272816A CN 103353427 A CN103353427 A CN 103353427A
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Abstract
The invention relates to a load testing apparatus for polyolefin and composite pipe and the like thereof and aims to provide an internal pressure-flattening load testing apparatus for a polyolefin pipe and a polyolefin composite pipe. The apparatus comprises an internal pressure loading device and a flattening loading device; two ends of a to-be-tested pipe are respectively provided with a sealing device, and the internal pressure loading device is connected with the sealing device at one of the two ends; the flattening loading device comprises a loading mechanism and a transmission device, wherein the transmission device and a supporting seat are installed on a truss, the upper side of a loading flat plate is connected with the loading mechanism through a rod member and the transmission device, the loading mechanism is further connected with a controller, and the magnitude of a load and a loading rate are adjusted through controlling of the flattening loading device. According to the invention, the apparatus can simultaneously provide complex loads consisting of an internal pressure load and a flattening static load or flattening fatigue load for a pipeline at different temperatures so as to realize testing of mechanical behaviors or safety performance of polyolefin and composite pipes thereof under the action of multi-load coupling.
Description
Technical field
The invention relates to the load test device of polyolefin and complex pipe thereof etc., particularly press-flatten load test device in a kind of polyolefin pipe and the polyolefin complex pipe.
Background technology
Plastic tube and complex pipe thereof have good toughness, shock resistance, corrosion resistant performance characteristics, and long service life, so such tubing is applied to the fields such as oil, chemical industry, municipal administration more and more.As far back as the forties in 20th century, the developed countries such as the U.S. just bring into use plastic tube, and to the nineties in 20th century, PE pipe proportion in all gas supply pipes surpasses 90%.Add up according to the plastic conduit database PPDC of the council (Plastic Pipe Database Committee), the whole America plastics Trunk Line had increased by 55655 km than 2006 in 2008, plastics facility sum has increased by 2,300,000, the plastic tube use amount is year by year ascendant trend, and at home, the PE pipe was brought into use from the nineties in 20th century, and use amount constantly rose in recent years.According to statistics, plastic conduit output was 580.4 ten thousand tons in 2009, increased by 18.9% on a year-on-year basis, and wherein the PE pipe accounts for 29% of total amount; 1～September in 2010, the plastic conduit turnout was 552.81 ten thousand tons, increased by 28.23% on a year-on-year basis.Reinforced plastic pipe has kept swift and violent growth momentum equally as emerging pipeline.Can be seen by statistics both domestic and external, usage quantity and the scale of plastics and composite pipe thereof enlarge gradually, but then, plastics and complex pipe constructing operation personnel technological literacy thereof have much room for improvement, the management maintenance personnel are not enough to the understanding of plastics and Composite pipe properties characteristics, it is not strong that the attention of pipeline maintenance is reached management regulation not, so the accident that plastics and complex pipe occured in construction and application stage is not rarely seen.Show that according to researchist's finding the failure cause of plastics and complex pipe thereof can be divided into again according to the load classification: bending load, extrusion load and point load etc.These load are polyolefin pipe and the complex pipe thereof of independent role or coupling pressure in carrying separately, has just consisted of the complex load stand under load of pipeline.
For the research of plastic tube and complex pipe mechanical property thereof for some time, but tubing, the mechanical property when pipe fitting bears single inner pressuring load are mainly paid close attention in traditional research, such as in short-term explosion bulge test research, hydrostatic test research etc. when long, and do not consider extrusion load, bending load and the point load that may bear in the pipeline real work, and the pipeline failure risk that is caused by these load.Wherein a major reason is owing to lack corresponding method of testing and equipment, causes the Performance Characteristics research under complex load of plastic tube and complex pipe thereof to be difficult to carry out.Therefore, can remedy the vacancy of existing testing equipment, the device demand of plastic tube and complex pipe thereof being done load test is strong.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes deficiency of the prior art, provides in a kind of polyolefin pipe that can test under the different temperatures environment and the polyolefin complex pipe to press-flatten load test device.
For solving the problems of the technologies described above, solution of the present invention is:
Provide in a kind of polyolefin pipe and the polyolefin complex pipe to press-flatten load test device, comprise be used to the interior pressure charger of keeping tubing inside water pressure to be measured, and flatten charger; Packoff is established at the two ends of tubing to be measured, and described interior pressure charger links to each other with the packoff of an end wherein; This device also comprises truss and Water Tank with Temp.-controlled, and the carrier bar of truss is positioned at Water Tank with Temp.-controlled top and in parallel; A suspention post straight down is equipped with respectively at the two ends of carrier bar, respectively is provided with a circular clip that is used for fixing tubing to be measured in suspention post bottom, and the connecting line in the clip center of circle is mutually vertical and coplanar with the axis of two suspention posts; This device also comprises loading flat board and supporting seat, and dull and stereotyped lower surface is parallel with the supporting seat upper surface, is used for the stage casing of placing tubing to be measured between the two; Flatten charger and comprise load maintainer and gearing, gearing and supporting seat are installed on the truss; Load dull and stereotyped upside and link to each other with load maintainer by rod member, gearing, load maintainer provides power to make and loads the dull and stereotyped vertical direction to-and-fro movement that realizes; In the described rod member load test device is housed, is used for recording power load or the displacement load that applies; Load maintainer also connects a controller, by the control of flattening charger being regulated size and the loading speed of load, and the power that bear in real time record tubing stage casing in process of the test and the displacement of generation.
Among the present invention, be oppositely arranged two suspension arms that protrude downwards in the bottom of two ends suspention post, a triangular support bracket is respectively established in its inboard; A pin-and-hole is all offered in the end of each suspension arm, and two pin-and-holes have identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Set up fixture separately in described circular clip both sides for fixing tubing to be measured, the distance between two end face is less than the spacing of two suspension arm inboards; Establish coaxial pin-and-hole on two end faces of clip fixture, its internal diameter is identical with the internal diameter of suspension arm end pin-and-hole, and is implemented in the installation of suspension arm end by pin; The structure of circular clip is divided into up and down two parts, and two-part structure is identical and symmetrical about divisional plane; Stiff end in the clip both sides also provides vertical bolt hole, and realizes the fastening of clip and pin by set bolt.
Among the present invention, establishing and loading dull and stereotyped length is L
1, the distance between the clip of tubing to be measured two ends is L
2, tubing nominal diameter to be measured is D
0, L then
2-L
1〉=4 D
0.
Among the present invention, the end of establishing tubing to be measured is L to distance between the circular clip that is used for fixing tubing to be measured
3, L then
3Value is taken as 2～5 times of pipe diameter to be measured.
Among the present invention, establishing clip disc minimum point is L to the distance of suspending the post bottom in midair
4, can rotate freely L for making clip
4Value should be not less than 1.5 times pipe diameter to be measured.
Among the present invention, described interior pressure charger comprises water pump and controller, and controller links to each other with water pump by cable, and water pump links to each other with the packoff of pipe end to be measured by flexible pipe.
Among the present invention, the load maintainer of described flattening charger is motor or hydraulically operated equipment (HOE).
Among the present invention, described truss has a kind of in the following structure: truss is across the top of Water Tank with Temp.-controlled and forms cross structure with carrier bar; Perhaps truss is crossed over the setting of Water Tank with Temp.-controlled length direction, and spandrel girder and truss are integrated.
Compared with prior art, the invention has the beneficial effects as follows:
Can under different temperatures, pipeline be provided simultaneously inner pressuring load and flatten static load or flatten the complex load that fatigue load forms, realize mechanical behavior or the security performance test under the multi-load coupling of polyolefin and complex pipe thereof.
Be the rigidity and stability that improves load carrier, the truss that adopts among the present invention and carrier bar consist of cross structure, when Water Tank with Temp.-controlled can be taked the more simple carrier bar design proposal of a kind of structure more in short-term, only at the tank length direction single truss is set and plays the effect of hanging test tubing.
Description of drawings
Fig. 1 is the overall schematic of interior pressure the among the present invention-flattening load testing machine.
Fig. 2 is the front elevational schematic of interior pressure the among the present invention-flattening load testing machine.
Fig. 3 is the synoptic diagram behind the suspention post clamping tubing to be measured.
Fig. 4 is the suspension arm of suspention post bottom and the synoptic diagram after the clip combination.
Fig. 5 is the structural representation of the suspension arm of suspention post bottom.
Clip the first half structural representation that Fig. 6 uses for fixing tubing to be measured.
The clip assembling synoptic diagram that Fig. 7 uses for fixing tubing to be measured.
Fig. 8 is front elevational schematic after suspension arm and the clip combination.
Fig. 9 is the overall schematic of single truss-frame structure among the present invention.
Reference numeral among the figure is: 1 loads flat board; 2 tubing; 3 interior pressure chargers; 4 truss; 5 tanks; 6 packoffs; 7 suspention posts; 8 clips; 9 fastening bolts; 10 pins; 11 pin-and-holes; 12 suspension arms.
Embodiment
Below in conjunction with accompanying drawing and embodiment, be described in further detail pressing-flatten load testing machine in polyolefin of the present invention and the complex pipe thereof:
This device comprises be used to the interior pressure charger 3 of keeping tubing 2 inside water pressure to be measured, and flattens charger; Packoff 6 is established at the two ends of tubing 2 to be measured, and described interior pressure charger 3 links to each other with the packoff 6 of an end wherein; Described interior pressure charger 3 comprises water pump and controller, and controller links to each other with water pump by cable, and water pump links to each other by the packoff 6 of flexible pipe with tubing to be measured 2 ends.This is because when tubing 2 to be measured is tested, also should keep certain interior pressure in the tubing 2 to be measured.Controller in the interior pressure charger 3 can be controlled to press in interior pressure size and the real time record and change.
This device also comprises truss 4 and Water Tank with Temp.-controlled 5, and the carrier bar of truss 4 is positioned at Water Tank with Temp.-controlled 5 tops and in parallel; A suspention post 7 straight down is equipped with respectively at the two ends of carrier bar, respectively is provided with a circular clip 8 that is used for fixing tubing 2 to be measured in suspention post 7 bottoms, and the connecting line in clip 8 centers of circle is mutually vertical and coplanar with the axis of two suspention posts 7; This device also comprises loading dull and stereotyped 1 and supporting seat, and dull and stereotyped lower surface is parallel with the supporting seat upper surface, is used for the stage casing of placing tubing 2 to be measured between the two; Flatten charger and comprise load maintainer and gearing, gearing and supporting seat are installed on the truss 4; The upside that loads flat board 1 links to each other with load maintainer by rod member, gearing, and load maintainer provides power to make loading dull and stereotyped 1 realize the vertical direction to-and-fro movement; In the described rod member load test device is housed, is used for recording power load or the displacement load that applies; Load maintainer also connects a controller, by the control of flattening charger being regulated size and the loading speed of load, and the power that bear in real time record tubing 2 stage casings in process of the test and the displacement of generation.
Bottom at two ends suspention post 7 is oppositely arranged two suspension arms 12 that protrude downwards, and a triangular support bracket is respectively established in its inboard; The end of each suspension arm 12 is all offered 11, two pin-and-holes 11 of a pin-and-hole and is had identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Set up fixture separately in described circular clip 8 both sides for fixing tubing 2 to be measured, the distance between two end face is less than the spacing of two suspension arms, 12 inboards; Establish coaxial pin-and-hole 11 on two end faces of clip 8 fixtures, its internal diameter is identical with the internal diameter of suspension arm 12 end pin-and-holes 11, and is implemented in the installation of suspension arm 12 ends by pin 10; The structure of circular clip 8 is divided into up and down two parts, and two-part structure is identical and symmetrical about divisional plane; Stiff end in clip 8 both sides also provides vertical bolt hole, and realizes the fastening of clip 8 and pin 10 by set bolt.
After up and down two parts closure of circular clip 8, tubing 2 to be measured is fixed in the clip 8, and two clips 8 can be at its center of circle institute connecting shaft line and the determined rotation with in surface of two vertically depending posts, 7 axis.Two clips 8 can be dismantled, and the distance between two suspention posts 7 also can regulate, to adapt to the testing requirements of different-diameter tubing 2.Clip 8 can be rotated take pin 10 as rotating shaft.On two pins 10 bolt hole is arranged, the bolt hole of pin 10 is aimed at clip 8 both sides bolts hole, inserts afterwards fastening bolt 9, and fastening bolt 9 has two effects: the one, make clip about in the of 8 two parts mutually compress, be assembled into one; The 2nd, assembling closed clip 8 is connected as one with pin 10, thereby clip 8 can be rotated take pin 10 as axle in test.
For the packoff 6 of guaranteeing tubing 2 two ends can remain sealing in process of the test, tubing 2 ends should keep certain length.For the packoff 6 of guaranteeing tubing 2 two ends can remain sealing in process of the test, tubing 2 ends should keep certain length, i.e. the distance L of tubing 2 terminations and tubing 2 end clips 8
3Should keep a certain higher value, if but L
3Be worth excessively, vibration and sway by a relatively large margin may occur in tubing 2 terminations when then bending test was carried out, and may cause that equally sealing property descends.Suggestion L
3Value is taken as 2～5 times of test tubing 2 diameters.
Among the present invention, establishing the length that loads flat board 1 is L
1, the distance between the tubing 2 two ends clips 8 to be measured is L
2, tubing 2 nominal diameters to be measured are D
0, when applying flattening load, if flattening load applying place and clip 8 distances are less, then flatten load and may cause tubing 2 at clip 8 constraint place failures, affect validity and the accuracy of test findings, also may cause tubing 2 sealings to descend simultaneously.Therefore, for reducing to flatten load to the impact of clip 8 constraint place tubing 2, and guarantee that the packoff 6 at tubing 2 two ends can remain good sealing property in process of the test, suggestion L
2-L
1〉=4D
0.
If clip 8 disc minimum points are L to the distance of suspention post 7 bottoms
4, can rotate freely L for making clip 8
4Value should be not less than 1.5 times tubing to be measured 2 diameters.
The below is specifically described the present invention as an example of the steel wire winding complex pipe of DN200 example.
DN200 pipe diameter D
0Be taken as 200mm, clip 8 internal diameters are all 200mm mutually with tubing 2, and clip 8 thickness are 10mm, and clip 8 length vertically is 200mm.The length L of flat board in the middle of the tubing 2
1Can determine according to testing requirements, get L in this example
1Be 400mm, width also is taken as 400mm.Same length, the width that flattens the base for supporting of charger also is taken as 400mm.The L that requires according to described testing machine
2-L
1〉=4D
0So, L
2Span be L
2〉=1200mm namely should be at a distance of 1200mm at least between two clips 8 of tubing 2 ends.Get L in this example
2Be 1600mm.Tubing 2 ends are equipped with packoff 6, so tubing 2 ends should determine that packoff 6 axial lengths are taken as 300mm in this example according to the size of packoff 6 to the distance between the tubing 2 end clips 8, tubing 2 ends to tubing 2 ends by the distance L of clip 8 constraints place
3Be taken as 400mm, so tubing 2 length are 2800mm.
Then just can adopt different steady temperature environment according to the different operating demand, DN200 tubing is carried out inner pressuring load and the security performance test of flattening static load or flattening the complex load of fatigue load composition.
Be illustrated as an example of cross truss bearing structure example in the above example, but this patent is equally applicable to other truss-frame structures.When the test pipe length more in short-term can be only arranges single truss and plays the effect of hanging test tubing at the tank length direction, as shown in Figure 9.
Claims (8)
1. press in polyolefin pipe and the polyolefin complex pipe-flatten load test device, comprise be used to the interior pressure charger of keeping tubing inside water pressure to be measured, and flatten charger; It is characterized in that packoff is established at the two ends of tubing to be measured, described interior pressure charger links to each other with the packoff of an end wherein; This device also comprises truss and Water Tank with Temp.-controlled, and the carrier bar of truss is positioned at Water Tank with Temp.-controlled top and in parallel; A suspention post straight down is equipped with respectively at the two ends of carrier bar, respectively is provided with a circular clip that is used for fixing tubing to be measured in suspention post bottom, and the connecting line in the clip center of circle is mutually vertical and coplanar with the axis of two suspention posts; This device also comprises loading flat board and supporting seat, and dull and stereotyped lower surface is parallel with the supporting seat upper surface, is used for the stage casing of placing tubing to be measured between the two; Flatten charger and comprise load maintainer and gearing, gearing and supporting seat are installed on the truss; Load dull and stereotyped upside and link to each other with load maintainer by rod member, gearing, load maintainer provides power to make and loads the dull and stereotyped vertical direction to-and-fro movement that realizes; In the described rod member load test device is housed, is used for recording power load or the displacement load that applies; Load maintainer also connects a controller, by the control of flattening charger being regulated size and the loading speed of load, and the power that bear in real time record tubing stage casing in process of the test and the displacement of generation.
2. device according to claim 1 is characterized in that, is oppositely arranged two suspension arms that protrude downwards in the bottom of two ends suspention post, and a triangular support bracket is respectively established in its inboard; A pin-and-hole is all offered in the end of each suspension arm, and two pin-and-holes have identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Set up fixture separately in described circular clip both sides for fixing tubing to be measured, the distance between two end face is less than the spacing of two suspension arm inboards; Establish coaxial pin-and-hole on two end faces of clip fixture, its internal diameter is identical with the internal diameter of suspension arm end pin-and-hole, and is implemented in the installation of suspension arm end by pin; The structure of circular clip is divided into up and down two parts, and two-part structure is identical and symmetrical about divisional plane; Stiff end in the clip both sides also provides vertical bolt hole, and realizes the fastening of clip and pin by set bolt.
3. device according to claim 2 is characterized in that, establishing clip disc minimum point is L to the distance of suspending the post bottom in midair
4, can rotate freely L for making clip
4Value should be not less than 1.5 times pipe diameter to be measured.
4. according to claim 1 to the device described in 3 any one, it is characterized in that the end of establishing tubing to be measured is L to distance between the circular clip that is used for fixing tubing to be measured
3, L then
3Value is taken as 2～5 times of pipe diameter to be measured.
5. according to claim 1 to the device described in 3 any one, it is characterized in that establishing and loading dull and stereotyped length is L
1, the distance between the clip of tubing to be measured two ends is L
2, tubing nominal diameter to be measured is D
0, L then
2-L
1〉=4 D
0
6. according to claim 1 to the device described in 3 any one, it is characterized in that described interior pressure charger comprises water pump and controller, controller links to each other with water pump by cable, and water pump links to each other with the packoff of pipe end to be measured by flexible pipe.
7. according to claim 1 to the device described in 3 any one, it is characterized in that the load maintainer of described flattening charger is motor or hydraulically operated equipment (HOE).
8. according to claim 1 to the device described in 3 any one, it is characterized in that described truss has a kind of in the following structure: truss is across the top of Water Tank with Temp.-controlled and forms cross structure with carrier bar; Perhaps truss is crossed over the setting of Water Tank with Temp.-controlled length direction, and spandrel girder and truss are integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310272816.5A CN103353427B (en) | 2013-06-30 | 2013-06-30 | Internal pressure-flattening load testing apparatus for polyolefin pipe and polyolefin composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310272816.5A CN103353427B (en) | 2013-06-30 | 2013-06-30 | Internal pressure-flattening load testing apparatus for polyolefin pipe and polyolefin composite pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103353427A true CN103353427A (en) | 2013-10-16 |
| CN103353427B CN103353427B (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310272816.5A Active CN103353427B (en) | 2013-06-30 | 2013-06-30 | Internal pressure-flattening load testing apparatus for polyolefin pipe and polyolefin composite pipe |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444906A (en) * | 2018-06-05 | 2018-08-24 | 中国人民解放军国防科技大学 | Testing device and testing method for surface friction coefficient of bean pod rod |
| WO2022134796A1 (en) * | 2020-12-24 | 2022-06-30 | 西安向阳航天材料股份有限公司 | Hydraulic compounding online strain monitoring control system and method for bimetallic composite pipe |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141494A (en) * | 2010-12-25 | 2011-08-03 | 长春机械科学研究院有限公司 | Testing machine for simulating fatigue life in full scale mode in marine environment of harbor pipeline |
| CN202126375U (en) * | 2011-06-30 | 2012-01-25 | 天津钢管集团股份有限公司 | Full-size bending test device for marine line pipes |
| CN203350140U (en) * | 2013-06-30 | 2013-12-18 | 浙江大学 | Internal pressure-flatting load testing device of polyolefin pipe and polyolefin composite pipe |
-
2013
- 2013-06-30 CN CN201310272816.5A patent/CN103353427B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141494A (en) * | 2010-12-25 | 2011-08-03 | 长春机械科学研究院有限公司 | Testing machine for simulating fatigue life in full scale mode in marine environment of harbor pipeline |
| CN202126375U (en) * | 2011-06-30 | 2012-01-25 | 天津钢管集团股份有限公司 | Full-size bending test device for marine line pipes |
| CN203350140U (en) * | 2013-06-30 | 2013-12-18 | 浙江大学 | Internal pressure-flatting load testing device of polyolefin pipe and polyolefin composite pipe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108444906A (en) * | 2018-06-05 | 2018-08-24 | 中国人民解放军国防科技大学 | Testing device and testing method for surface friction coefficient of bean pod rod |
| WO2022134796A1 (en) * | 2020-12-24 | 2022-06-30 | 西安向阳航天材料股份有限公司 | Hydraulic compounding online strain monitoring control system and method for bimetallic composite pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103353427B (en) | 2015-04-15 |
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