CN203350122U - Internal pressure-point pressure load testing device for polyolefin pipe and polyolefin composite pipe - Google Patents
Internal pressure-point pressure load testing device for polyolefin pipe and polyolefin composite pipe Download PDFInfo
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- CN203350122U CN203350122U CN 201320387847 CN201320387847U CN203350122U CN 203350122 U CN203350122 U CN 203350122U CN 201320387847 CN201320387847 CN 201320387847 CN 201320387847 U CN201320387847 U CN 201320387847U CN 203350122 U CN203350122 U CN 203350122U
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- load
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- tubing
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Abstract
The utility model relates to a load testing device for a polyolefin pipe, a polyolefin composite pipe and the like, and aims at providing an internal pressure-point pressure load testing device for a polyolefin pipe and a polyolefin composite pipe. The device comprises an internal pressure loading device and a point pressure loading device, wherein sealing devices are arranged at two ends of a pipe to be detected, and the internal pressure loading device is connected to the sealing device at one end; the point pressure loading device is arranged above a hoop of a middle suspension column; the point pressure loading device comprises a loading mechanism, a transmission device and a thin rod; the loading mechanism is connected to a controller; the controller is used for regulating a load and a loading velocity through control on the point pressure loading device, and force and displacement of the middle section of the pipe in a testing process are recorded in real time. The load testing device provided by the utility model can simultaneously apply a composite load of an internal pressure load and a point pressure static load or a point pressure fatigue load to a pipeline at different temperatures so as to perform mechanical behavior or safety performance testing on the polyolefin pipe and the polyolefin composite pipe under a multi-load coupling effect.
Description
Technical field
The utility model is the load test device about polyolefin and complex pipe thereof etc., particularly a kind ofly can apply interior pressure-the press device of load test to polyolefin and complex pipe thereof.
Background technology
Plastic tube and complex pipe thereof have good toughness, shock resistance, corrosion resistant characteristic of property, 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%.According to the plastic conduit database PPDC of the council (Plastic Pipe Database Committee), add up, within 2008, the whole America plastics Trunk Line increased by 55655 km than 2006, plastics facility sum has increased by 2,300,000, the plastic tube use amount is ascendant trend year by year, 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, within 2009, plastic conduit output is 580.4 ten thousand tons, increases 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, as emerging pipeline, has kept swift and violent growth momentum equally.By statistics both domestic and external, can be seen, 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 to management regulation not, so the accident that plastics and complex pipe occurred in construction and application stage is not rarely seen.According to researchist's finding, show, 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 formed the complex load stand under load of pipeline.
For the research of plastic tube and complex pipe mechanical property thereof for some time, but mechanical property when traditional research is mainly paid close attention to tubing, pipe fitting and born single inner pressuring load, as explosion bulge test in short-term 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 caused by these load.Wherein a major reason is owing to lacking 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 make up the vacancy of existing testing equipment, the device demand of plastic tube and complex pipe thereof being done to load test is strong.
The utility model content
The technical problems to be solved in the utility model is, overcomes deficiency of the prior art, provides in a kind of polyolefin pipe that can be tested under the different temperatures environment and polyolefin complex pipe and presses-press load test device.
For solving the problems of the technologies described above, solution of the present utility model is:
Provide in a kind of polyolefin pipe and polyolefin complex pipe and press-press load test device, comprise for maintaining the interior pressure charger of tubing inside water pressure to be measured, and press charger; Packoff is established at the two ends of tubing to be measured, and described interior pressure charger is connected with the packoff of an end wherein; This device also comprises truss and constant temperature water tank, and the carrier bar of truss is positioned at constant temperature water tank top and in parallel; A suspention post straight down is equipped with respectively at the two ends of carrier bar, in suspention post bottom, respectively is provided with a circular clip for fixing tubing to be measured, and the connecting line in the clip center of circle is mutually vertical and coplanar with the axis of two suspention posts; On the carrier bar between two ends suspentions post, also be provided with one straight down in the middle of the suspention post, the axis of three suspention posts is coplanar, and between middle suspention post and two ends suspention post apart from equating; The bottom of middle suspention post is equipped with circular clip, and the clip end face has aperture; Three clips have identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Arrange and press charger above the clip of centre suspention post, press charger and comprise load maintainer, gearing and thin bar, the external diameter of thin bar is less than the internal diameter of clip end face aperture and can passes freely through this aperture; Gearing is arranged on truss, and in the middle of thin bar is arranged on by rod movable with holes, on the suspention post, load maintainer is connected with thin bar by gearing; Load test device is housed in rod member, the power load applied for measurement or displacement load; Load maintainer also connects a controller, regulates size and the loading speed of load by the control to pressing charger, and the power that bear in real time record tubing stage casing in process of the test and the displacement of generation.
In the utility model, in the bottom of two ends suspention post, be oppositely arranged two suspension arms that protrude downwards, 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 the 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 realizes the installation in the suspension arm end by pin; The structure of circular clip is divided into upper and lower two parts, and two-part structure is identical and about the divisional plane symmetry; Stiff end in the clip both sides also provides vertical bolt hole, and realizes the fastening of clip and pin by set bolt.
In the utility model, the end of establishing tubing to be measured is L to distance between the circular clip for fixing tubing to be measured
3, L
3value is taken as 2～5 times of pipe diameter to be measured.
In the utility model, the clip of establishing tubing to be measured two ends is L along the axial length
1, the distance between two clips is L
2, tube end to be measured is L to the distance of end clip
3, the packoff length of tube end assembling to be measured is L
4, the pipe end clip is L to the distance of tube end
5; The distance between the clip of tubing to be measured two ends is L
2be not less than the pipe diameter of twice; For making sealing clamp keep good sealing in process of the test, should make L
5>L
4; Pipe length should be greater than (L
2+ 2 * L
1+ 2 * L
3).
In the utility model, establishing clip disc minimum point is L to the distance of suspending the post bottom in midair
6, can rotate freely L for making clip
6value should be not less than the pipe diameter to be measured of 1.5 times.
In the utility model, described interior pressure charger comprises water pump and controller, and controller is connected with water pump by cable, and water pump is connected with the packoff of pipe end to be measured by flexible pipe.
In the utility model, the described load maintainer that presses charger is motor or hydraulically operated equipment (HOE).
In the utility model, described truss has a kind of in following structure: truss is across the top of constant temperature water tank and forms cross structure with carrier bar; Perhaps truss is crossed over the setting of constant temperature water tank length direction, and spandrel girder and truss are integrated.
Compared with prior art, the beneficial effects of the utility model are:
Can be under different temperatures, pipeline is provided inner pressuring load simultaneously and presses static load or press the complex load of fatigue load, realize mechanical behavior or the security performance test under the multi-load coupling of polyolefin and complex pipe thereof.
For improving rigidity and the stability of load carrier, the truss adopted in the utility model and carrier bar form cross structure, when constant temperature water tank can be taked the more simple carrier bar design proposal of a kind of structure more in short-term, only at the water tank length direction, single truss is set and plays the effect of hanging test tubing.
The accompanying drawing explanation
Fig. 1 is the overall schematic of pressing-pressing load testing machine in the utility model.
Fig. 2 is the front elevational schematic of pressing-pressing load testing machine in the utility model.
The partial enlarged drawing that Fig. 3 is I place in Fig. 1.
The overall schematic that Fig. 4 is single truss-frame structure in the utility model.
Fig. 5 is for suspending the schematic diagram after post clamps tubing to be measured in midair.
The suspension arm that Fig. 6 is suspention post bottom and the schematic diagram after the clip combination.
Fig. 7 is the structural representation of the suspension arm of suspention post bottom.
Clip the first half structural representation that Fig. 8 uses for fixing tubing to be measured.
The clip assembling schematic diagram that Fig. 9 uses for fixing tubing to be measured.
Figure 10 is front elevational schematic after suspension arm and clip combination.
Reference numeral in figure is: 1 tubing; 2 thin bars; 3 packoffs; 4 interior pressure chargers; 5 truss; 6 tanks; 7 suspention posts; 8 clips; 9 fastening bolts; 10 pins; 11 suspension arms; 12 pin-and-holes.
Embodiment
Below in conjunction with accompanying drawing and embodiment, in the polyolefin pipe in the utility model and polyolefin complex pipe, pressing-press load test device to be described in further detail:
This device comprises for maintaining the interior pressure charger 4 of tubing 1 inside water pressure to be measured, and presses charger; Packoff 3 is established at the two ends of tubing 1 to be measured, and described interior pressure charger 4 is connected with the packoff 3 of an end wherein; Described interior pressure charger 4 comprises water pump and controller, and controller is connected with water pump by cable, and water pump is connected with the packoff 3 of tubing to be measured 1 end by flexible pipe.This is because, when tubing 1 to be measured is tested, also should keep certain interior pressure in tubing 1 to be measured.Controller in interior pressure charger 4 can be controlled in interior pressure size real time record and press and change.
This device also comprises truss 5 and Water Tank with Temp.-controlled 6, and the carrier bar of truss 5 is positioned at tank 6 tops and in parallel; A suspention post 7 straight down is equipped with respectively at the two ends of carrier bar, in suspention post 7 bottoms, respectively is provided with a circular clip 8 for fixing tubing 1 to be measured, and the connecting line in clip 8 centers of circle is mutually vertical and coplanar with the axis of two suspention posts 7; On the carrier bar between two ends suspentions post 7, also be provided with one straight down in the middle of the axis of 7, three suspention posts 7 of suspention post coplanar, and between middle suspention post 7 and two ends suspention post 7 apart from equating; The bottom of middle suspention post 7 is equipped with circular clip 8, and clip 8 end faces have aperture; Three clips 8 have identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Arrange and press charger above the clip 8 of centre suspention post 7, press charger and comprise load maintainer, gearing and thin bar 2, the external diameter of thin bar 2 is less than the internal diameter of clip 8 end face apertures and can passes freely through this aperture; Gearing is arranged on truss 5, and in the middle of thin bar 2 is arranged on by rod movable with holes, on suspention post 7, load maintainer is connected with thin bar 2 by gearing.This load maintainer can be motor or hydraulically operated equipment (HOE).
Bottom at two ends suspention post 7 is oppositely arranged two suspension arms 11 that protrude downwards, and a triangular support bracket is respectively established in its inboard; The end of each suspension arm 11 is all offered 12, two pin-and-holes 12 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 1 to be measured, the distance between two end face is less than the spacing of two suspension arm 11 inboards; Establish coaxial pin-and-hole 12 on two end faces of clip 8 fixtures, its internal diameter is identical with the internal diameter of suspension arm 11 end pin-and-holes 12, and the installation realized in suspension arm 11 ends by pin 10; The structure of circular clip 8 is divided into upper and lower two parts, and two-part structure is identical and about the divisional plane symmetry; Stiff end in clip 8 both sides also provides vertical through hole, and realizes the fastening of clip 8 and pin 10 by set bolt.
After the closure of two parts up and down of circular clip 8, tubing 1 to be measured is fixed in 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 post 7 axis.Two clips 8 can be dismantled, and the distance between two suspention posts 7 also can be regulated, to adapt to the testing requirements of different-diameter tubing 1.Clip 8 can be take pin 10 and is rotated 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 Shang Xia 8 two parts mutually compress, be assembled into one; The 2nd, make to assemble closed clip 8 and connect as one with pin 10, thereby make clip 8 can take in test pin 10, be rotated as axle.
If clip 8 disc minimum points are L to the distance of suspention post 7 bottoms
6, can rotate freely L for making clip 8
6value should be not less than tubing to be measured 1 diameter of 1.5 times.
The bottom of middle suspention post 7 is equipped with circular clip 8, and it is D that clip 8 end faces have diameter
1aperture; Three clips 8 have identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Arrange and press charger above the clip 8 of centre suspention post 7, press charger and comprise load maintainer, gearing and thin bar 2, thin bar 2 diameters are d
1, be less than the internal diameter of clip 8 end face apertures and can pass freely through this aperture; Gearing is arranged on truss 5, and in the middle of thin bar 2 is arranged on by rod movable with holes, on suspention post 7, load maintainer is connected with thin bar 2 by gearing.Load maintainer provides power, by gearing, makes thin bar 2 realize the vertical direction to-and-fro movement, and thin bar 2 is passed clip 8 top apertures and the tubing 1 to be measured that applies pressure to.Carry in loading procedure at point, may cause when thin bar 2 applies pressure to tubing 1 to be measured that tubing 1 to be measured deforms, and, because tubing to be measured 1 stage casing is retrained by clip 8, be difficult to occur Free Transform, more approaching with the situation in actual use procedure.In the rod member be connected with thin bar 2, load test device is housed, can records the power load or the displacement load that apply.In pressing static test or pressing torture test, the controller of point in compression testing device regulated the size, loading speed etc. of load by the control to pressing charger, and the power that bear in real time record tubing 1 stage casing in process of the test and the displacement of generation.
If the end of tubing 1 to be measured is L to distance between the circular clip 8 for fixing tubing 1 to be measured
3, L
3value is taken as 2～5 times of tubing 1 diameter to be measured.If the clip 8 at tubing to be measured 1 two ends is L along the axial length
1, the distance between two clips 8 is L
2, tubing 1 end to be measured is L to the distance of end clip 8
3, packoff 3 length of tubing 1 end assembling to be measured are L
4; For reducing the impact of a compressive load on part outside tubing 1 pressure-bearing point, the distance between tubing 1 two ends clip 8 to be measured is L
2be not less than tubing 1 diameter of twice; For making sealing clamp keep good sealing in process of the test, should make L
3>L
4; Tubing 1 length should be greater than (L
2+ 2 * L
1+ 2 * L
3).
The steel wire winding complex pipe of DN200 of below take is specifically described the utility model as example.
DN200 tubing 1 diameter is 200mm, and clip 8 internal diameters are all 200mm mutually with tubing 1, and clip 8 thickness are 10mm, clip 8 length L vertically
1for 200mm.According in institute, pressing-press the load testing machine requirement, the distance L between tubing 1 two ends clip 8
2should be not less than tubing 1 diameter of twice, i.e. L
2>=400 mm, L in this example
2be taken as 1000mm.For making packoff 3 keep good sealing in process of the test, should make the distance L of tubing 1 end to end clip 8
3be greater than the sealing clamp length L
4, L in this example
4get 300mm, L
3>300mm.Therefore tubing 1 length should be greater than (L
2+ 2 * L
1+ 2 * L
3), be greater than 2000mm.
Then just can adopt different steady temperature environment according to the different operating demand, DN200 tubing is pressed static load or presses fatigue load and the test of the security performance of inner pressuring load.
In above example, test unit be take cross truss bearing structure and is illustrated as 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 4.
Claims (8)
1. press-press load test device in polyolefin pipe and polyolefin complex pipe, comprise for maintaining the interior pressure charger of tubing inside water pressure to be measured, and press charger; It is characterized in that, packoff is established at the two ends of tubing to be measured, and described interior pressure charger is connected 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, in suspention post bottom, respectively is provided with a circular clip for fixing tubing to be measured, and the connecting line in the clip center of circle is mutually vertical and coplanar with the axis of two suspention posts; On the carrier bar between two ends suspentions post, also be provided with one straight down in the middle of the suspention post, the axis of three suspention posts is coplanar, and between middle suspention post and two ends suspention post apart from equating; The bottom of middle suspention post is equipped with circular clip, and the clip end face has aperture; Three clips have identical internal diameter, and its center of circle conllinear and disc are parallel to each other; Arrange and press charger above the clip of centre suspention post, press charger and comprise load maintainer, gearing and thin bar, the external diameter of thin bar is less than the internal diameter of clip end face aperture and can passes freely through this aperture; Gearing is arranged on truss, and in the middle of thin bar is arranged on by rod movable with holes, on the suspention post, load maintainer is connected with thin bar by gearing; Load test device is housed in rod member, the power load applied for measurement or displacement load; Load maintainer also connects a controller, regulates size and the loading speed of load by the control to pressing charger, 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, in the bottom of two ends suspention post, is oppositely arranged two suspension arms that protrude downwards, 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 the 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 realizes the installation in the suspension arm end by pin; The structure of circular clip is divided into upper and lower two parts, and two-part structure is identical and about the divisional plane symmetry; 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
6, can rotate freely L for making clip
6value should be not less than the pipe diameter to be measured of 1.5 times.
4. according to the device described in the claims 1 to 3 any one, it is characterized in that, the end of establishing tubing to be measured is L to distance between the circular clip for fixing tubing to be measured
3, L
3value is taken as 2～5 times of pipe diameter to be measured.
5. according to the device described in the claims 1 to 3 any one, it is characterized in that, the clip of establishing tubing to be measured two ends is L along the axial length
1, the distance between two clips is L
2, tube end to be measured is L to the distance of end clip
3, the packoff length of tube end assembling to be measured is L
4, the pipe end clip is L to the distance of tube end
5; The distance between the clip of tubing to be measured two ends is L
2be not less than the pipe diameter of twice; For making sealing clamp keep good sealing in process of the test, should make L
5>L
4; Pipe length should be greater than (L
2+ 2 * L
1+ 2 * L
3).
6. according to the device described in the claims 1 to 3 any one, it is characterized in that, described interior pressure charger comprises water pump and controller, and controller is connected with water pump by cable, and water pump is connected with the packoff of pipe end to be measured by flexible pipe.
7. according to the device described in the claims 1 to 3 any one, it is characterized in that, the described load maintainer that presses charger is motor or hydraulically operated equipment (HOE).
8. according to the device described in the claims 1 to 3 any one, it is characterized in that, described truss has a kind of in 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 |
|---|---|---|---|
| CN 201320387847 CN203350122U (en) | 2013-06-30 | 2013-06-30 | Internal pressure-point pressure load testing device for polyolefin pipe and polyolefin composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320387847 CN203350122U (en) | 2013-06-30 | 2013-06-30 | Internal pressure-point pressure load testing device for polyolefin pipe and polyolefin composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203350122U true CN203350122U (en) | 2013-12-18 |
Family
ID=49750006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320387847 Withdrawn - After Issue CN203350122U (en) | 2013-06-30 | 2013-06-30 | Internal pressure-point pressure load testing device for polyolefin pipe and polyolefin composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203350122U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353418A (en) * | 2013-06-30 | 2013-10-16 | 浙江大学 | Internal pressure-point pressure load testing apparatus for polyolefin pipe and polyolefin composite pipe |
-
2013
- 2013-06-30 CN CN 201320387847 patent/CN203350122U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353418A (en) * | 2013-06-30 | 2013-10-16 | 浙江大学 | Internal pressure-point pressure load testing apparatus for polyolefin pipe and polyolefin composite pipe |
| CN103353418B (en) * | 2013-06-30 | 2015-08-26 | 浙江大学 | Press-press load test device in polyolefin pipe and polyolefin complex pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131218 Effective date of abandoning: 20150826 |
|
| RGAV | Abandon patent right to avoid regrant |