CN104897487B - A kind of full-scale non-metal pipe minimum bending radius method of testing and system - Google Patents

A kind of full-scale non-metal pipe minimum bending radius method of testing and system Download PDF

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Publication number
CN104897487B
CN104897487B CN201510310108.5A CN201510310108A CN104897487B CN 104897487 B CN104897487 B CN 104897487B CN 201510310108 A CN201510310108 A CN 201510310108A CN 104897487 B CN104897487 B CN 104897487B
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bending radius
developmental tube
test
tube sample
metal pipe
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CN104897487A (en
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李厚补
张学敏
戚东涛
羊东明
魏斌
朱原原
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China National Petroleum Corp
CNPC Tubular Goods Research Institute
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China National Petroleum Corp
CNPC Tubular Goods Research Institute
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Abstract

The invention discloses a kind of full-scale non-metal pipe minimum bending radius method of testing and system, the general principle of this method is that experiment tubing is carried out into reciprocating bending, or experiment tubing is fixed on bend test platform, imposed load makes its bending to certain bending radius, the subsequent load performance by hydrostatic pressing and explosion bulge test system testing non-metal pipe after bending state regulation or under certain bending radius state, with hydrostatic performance and in short-term failure pressure value evaluate the minimum memory bending radius and the minimum bending radius that works of non-metal pipe.

Description

A kind of full-scale non-metal pipe minimum bending radius method of testing and system
Technical field
The present invention relates to minimum bending radius test and verification technique field, more particularly to a kind of full-scale non-metal pipe Minimum bending radius method of testing and system.
Background technology
The non-metal pipe of fine corrosion resistance just turns into an important selection of oil-gas gathering and transportation pipeline.Non-metallic pipe It is exactly flexible that material, which especially strengthens thermoplastic composite tube biggest advantage, and the bending radius with very little, this advantage causes The laying of pipe crimping method is possibly realized, and greatlys save laying cost;The storage of long range tubing simultaneously and transport to become very It is convenient.But during non-metal pipe storage, installation and normal use, its minimum bending radius is bent over when what it was subject to When (including minimum memory bending radius and minimum work bending radius), each component units of tubing by Bending Influence, its Performance indications can be decreased obviously, and will have a strong impact on the military service performance and used life of non-metal pipe.Therefore, to different types of How non-metallic pipe product, determine the minimum bending radius of such tubing by simulating the serial experiment of operating mode;Meanwhile, to system The minimum bending radius of the non-metal pipe of business's offer is provided, how to carry out campaign, to verify whether it meets performance needs, The problem of as current urgent need to resolve.
For the test of non-metal pipe minimum bending radius, existing experimental provision is curved both for a certain feature in the world The fixation that bilge radius are made accounts for seat, is then laid tubing according to the shape for accounting for seat, and the bending radius for accounting for seat is reached with it. Test can be only formed a kind of bending radius simulation every time, if to do the crooked test of several groups of different radiis, need manufacture several The fixation of individual different radii accounts for seat, and be implemented and operate just very inconvenience.
China Patent Publication No. is CN102506665A file, using the two fan panels of same shape sizes and supporting Bolt be prepared for it is a kind of for ocean flexible pipe cable minimum bending radius test variable bending radius experimental provision, it passes through The distance of adjustment circular arc bolt and leveling screw forms the configuration line of differently curved radius.But also it is merely capable of meeting radius from 1 Rice is to the bending radius requirement of 3 meters of scopes (and must be 0.5 meter of increment), not yet explicitly performances evaluation under tubing minimum bending radius Criterion.When tubing minimum bending radius is not known, also experiment determination can not be carried out by the device.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of method simple possible, test period short a kind of full-scale Non-metal pipe minimum bending radius method of testing and system.
To reach above-mentioned purpose, the present invention uses following technical scheme:
A kind of full-scale non-metal pipe minimum bending radius test system, including chamber, are arranged in chamber and survey Platform is tried, heating system is also configured with chamber;Hydraulic transmission drive is provided with the test platform and does past The drive link of linear motion, transmission boom end is provided with for the pipe clamping device in the middle part of clamping developmental tube sample, hydraulic pressure drive control system System is connected with hydraulic transmission, on test platform centered on drive link line, it is equidistant to be symmetrical arranged several and use respectively In assembling slide bolt and the sliding recess and screw of fixing bolt;By adjust position of the slide bolt in sliding recess with Fixing bolt completes the clamping to different bore developmental tube samples, and hydrostatic pressing bursting test machine passes through pressure-bearing sebific duct and the developmental tube Sample is connected, and hydrostatic pressing bursting test machine is connected with water pressure control system, the corresponding water pressure test is set by water pressure control system Parameter.
Further, the drive link is fixed on the test platform by two adjustable spud piles.
Further, the adjustable spud pile is made up of holding ring and stud, and the stud two ends are connected respectively Holding ring and test platform.
Further, the upper end of the fixing bolt and the slide bolt is provided with rotational sleeve.
Further, the pipe clamping device is opposite opened, is realized and closed by two half and half clasps, and pipe clamping device is by bolt with passing Lever is fixed.
Further, multiple gripping blocks are set in the pipe clamping device, and fixed using fishbolt, the different bores of clamping are realized Tubing.
A kind of method for testing full-scale non-metal pipe minimum memory bending radius, comprises the following steps:
(1) preparation of samples:Intercept developmental tube sample;
(2) tubing is connected:Developmental tube sample is connected to hydrostatic pressing bursting test machine;
(3) sample is placed:It will be clamped in first in the middle part of developmental tube sample in pipe clamping device;Then according to the length of developmental tube sample and External diameter, determines the position of slide bolt and fixing bolt, and completion is gripped to developmental tube sample two ends;
(4) bending system is set:The distance of two fixing bolts is set as chord length, with reference to the developmental tube sample primarily determined that Bending radius is stored, distance mobile in the middle part of tubing is calculated, by the data input to hydraulic transmission control system, and sets reciprocal Bend number of times;
(5) cripping test:Hydraulic transmission control system is opened, drives pipe clamping device to make developmental tube sample by hydraulic transmission Generation is reciprocally bending;
(6) load performance is tested:After cripping test terminates, it is straightened condition to recover developmental tube sample, is filled into developmental tube sample Full water, closed rear startup non-metal pipe hydrostatic pressing explosion bulge test system, according to the requirement of developmental tube sample standard, carries out hydrostatic pressing It can be tested with failure pressure in short-term;
(7) result judgement:If the hydrostatic performance of developmental tube sample or in short-term failure pressure are below or above standard requirement, The storage bending radius of setting is then decreased or increased, above step is repeated, until the critical point of the standard of arrival requirement, now sets Storage bending radius be developmental tube sample minimum memory bending radius.
Further, test specimen is come and gone into bending 10 times in step (5).
A kind of method for testing full-scale non-metal pipe minimum work bending radius, comprises the following steps:
(1) preparation of samples:Intercept developmental tube sample (7);
(2) tubing is connected:Developmental tube sample is connected to hydrostatic pressing bursting test machine (13);
(3) sample is placed:It will be clamped in first in the middle part of developmental tube sample (7) in pipe clamping device (5);Then according to developmental tube sample (7) length and external diameter, determine the position of slide bolt (4) and fixing bolt (8), complete the clamping to developmental tube sample two ends and consolidate It is fixed;
(4) bending system is set:The distance of two fixing bolts (8) is set as chord length, with reference to the experiment primarily determined that Pipe sample (7) work bending radius, calculates distance mobile in the middle part of tubing, by the data input to hydraulic transmission control system (16);
(5) state is adjusted:Hydraulic transmission control system is opened, drives pipe clamping device to make developmental tube sample by hydraulic transmission Under work bending radius state in setting, then developmental tube sample is full of after water and sealed, open heating system, setting experiment Temperature, and the state is kept to wanting seeking time;
(6) load performance is tested:After state adjustment terminates, start non-metal pipe hydrostatic pressing explosion bulge test system, according to The requirement of developmental tube sample standard, carries out hydrostatic performance and failure pressure is tested in short-term;
(7) result judgement:If load performance of the developmental tube sample under setting work bending radius meets standard requirement, Continue to bend tubing, reduce bending radius, repeat above step, until the load performance of non-metal pipe reaches standard requirement Critical value, bending radius now is the minimum work bending radius of developmental tube sample.
The invention provides a kind of method and pilot system for testing minimum work bending radius.The general principle of this method It is that experiment tubing is carried out into reciprocating bending (by minimum memory bending radius), or tubing will be tested to be fixed on bend test and put down On platform, imposed load makes its bending to certain bending radius (by minimum work bending radius), then by hydrostatic pressing and quick-fried Load performance of the broken pilot system test non-metal pipe after bending state regulation or under certain bending radius state, with hydrostatic Pressure performance and in short-term failure pressure value (should meet relevant criterion require) evaluate the minimum memory bending radius of non-metal pipe With minimum work bending radius.
The beneficial effects of the invention are as follows:
1st, the invention provides (including the minimum memory bending half of the full-scale non-metal pipe minimum bending radius of one kind test Footpath and minimum work bending radius) method, and give clear and definite judgment basis.Method of testing simple possible, test period Short, judgment basis is consistent with product standard requirement, simple and clear.
2nd, as needed, set in hydraulic transmission control system after relevant parameter (such as displacement, reciprocal time), i.e., Hydraulic transmission motoring ring test pipe sample can be driven to carry out reciprocally bending, or be still under certain bending radius state.Setting letter Single easy, automaticity and testing efficiency are high.
3rd, reciprocally bending is completed to developmental tube sample, or after being arranged under certain bending radius state, you can by hydraulic pressure Corresponding water pressure test parameter (such as pressure, temperature, time) is set in control system, can be then automatically performed to the experiment The hydrostatic performance (short-term and long-term) of pipe sample and failure pressure test in short-term.
Chamber in the experimental rig of the present invention is in addition to safety protection function, and the heating system of configuration can be completed The evaluation of full-scale non-metal pipe minimum bending radius under condition of different temperatures.
1st, the distance between two fixing bolts of clamp assay pipe sample (chord length) fixation can be surveyed, and sample bent radius is determined Afterwards, body arc length can be calculated by formula, drives pipe clamping device developmental tube sample is bent and is reached by hydraulic transmission Calculate arc length value.
2nd, by selecting the position of slide bolt and fixing bolt, and adjust between slide bolt and fixing bolt (8) Distance, can complete different length, different bores, the test of differently curved radius Pipe samples.
Further, pipe clamping device is opposite opened in experimental rig, and sets multiple gripping blocks, and different caliber pipe materials can be achieved Clamping and evaluation.
Further, rotational sleeve is provided with the upper end of the fixing bolt and the slide bolt, facilitates the examination Moving freely when testing the bending of pipe sample, it is to avoid abrasion to developmental tube sample.
Further, by adjusting the height of 2 adjustable spud piles in experimental rig, it can be ensured that drive link and developmental tube sample The center of circle is in same horizontal line, prevents the deviation of developmental tube sample, improves the security and accuracy of experiment.
Brief description of the drawings
The full-scale non-metal pipe minimum bending radius pilot system schematic diagram of accompanying drawing 1;
The non-metal pipe two ends fixed clamp schematic diagram of accompanying drawing 2;
The non-metal pipe of accompanying drawing 3 clamping transmission schematic diagram;
In figure:(1) chamber;(2) test platform;(3) sliding recess;(4) slide bolt;(5) pipe clamping device;(6) heat System;(7) developmental tube sample;(8) fixing bolt;(9) pressure-bearing sebific duct;(10) screw;(11) drive link;(12) adjustable spud pile; (13) hydrostatic pressing bursting test machine;(14) water pressure control system;(15) hydraulic transmission;(16) hydraulic transmission control system; (17) screw rod;(18) nut;(19) rotational sleeve;(20) half and half clasp;(21) gripping block;(22) fishbolt;(23) bolt; (24) holding ring;(25) stud.
Embodiment
The present invention program is illustrated below by way of specific embodiments and the drawings:
There is provided a kind of method for testing full-scale non-metal pipe minimum memory bending radius:This method first will experiment Pipe samples are placed on bend test platform, and the minimum memory bending radius designed according to tubing comes and goes bending 10 times, then will Test specimen keeps straightened condition, seals and fills after water and is connected with non-metal pipe hydrostatic pressing bursting test machine.Testing setup The hydrostatic performance (short-term and long-term) of full-scale non-metallic pipe sample under the conditions of temperature and pressure and in short-term failure pressure, and Judge whether result above meets relevant criterion requirement.Corresponding bending radius is that this is non-when meeting the critical value of standard requirement The minimum memory bending radius of metal tube product.
Similarly there is provided a kind of method for testing full-scale non-metal pipe minimum work bending radius:This method is first First the full-scale non-metal pipe of good seal is inserted on bend test platform, and with non-metal pipe hydrostatic pressing bursting test machine Connection.Then tubing is curved to certain bending radius, after water, under design temperature and pressure condition, test tubing exists Hydrostatic performance (short-term and long-term) under this bending radius and in short-term failure pressure.If non-metal pipe is in this bending radius Under load performance meet standard requirement, then continue bend tubing, reduce bending radius.Until the load performance of non-metal pipe The critical value (as failure pressure is just 3 times of nominal pressures in short-term) of standard requirement is reached, bending radius now is non-gold Belong to the minimum work bending radius of tubing.
The method for verifying full-scale non-metal pipe minimum bending radius is relatively easy:Clearly provide nonmetallic in manufacturer On the premise of tubing minimum memory bending radius and minimum work bending radius, deposited according to full-scale non-metal pipe minimum is tested The method for storing up bending radius and minimum work bending radius, test full-scale non-metallic pipe sample under the conditions of this bending radius Hydrostatic performance (short-term and long-term) and in short-term failure pressure.If above test result meets relevant criterion requirement, assert The minimum bending radius for the type non-metallic pipe that manufacturer provides is feasible, otherwise infeasible.
Accordingly, the invention discloses a kind of pilot system for evaluating full-scale non-metal pipe minimum bending radius, such as Shown in Fig. 1.It includes the modules such as bend test platform, bending control system, water pressure test system, heating and protector.
As shown in figure 1, the test platform 2 and the grade bend testing apparatus fixed placement of developmental tube sample 7 are in the chamber 1 Interior, the chamber 1 is provided with heating system 6 in addition to safety protection function, to Control experiment temperature.
As shown in figure 1, on the base of the test platform 2 centered on drive link 11 line, it is equidistant be symmetrical arranged it is some Individual sliding recess 3 and screw 10, are respectively used to assembling slide bolt 4 and fixing bolt 8.The pipe clamping device 5 is by the developmental tube After the clamping of sample 7, it is connected by the bolt 23 with the drive link 11.The drive link 11 passes through 2 adjustable spud piles 12 are fixed on the test platform 2, and are connected to the hydraulic transmission 15.(such as position is completed after corresponding parameter setting Shifting amount, reciprocal time etc.), the hydraulic transmission control system 16 drives the hydraulic transmission 15 to drive the drive link 11 And the pipe clamping device 5 does linear reciprocating motion, complete to the reciprocally bending of the developmental tube sample 7.
As shown in figure 1, hydrostatic pressing bursting test machine 13 is connected by pressure-bearing sebific duct 9 with the developmental tube sample 7.In the water Set in pressure control system 14 after corresponding water pressure test parameter (such as pressure, temperature, time), you can complete to the experiment The hydrostatic performance (short-term and long-term) of pipe sample 7 and failure pressure test in short-term.
As shown in Fig. 2 the two ends of the developmental tube sample 7 are clamped by the fixing bolt 8 and the slide bolt 4.Institute Fixing bolt 8 is stated to be threadingly attached in the screw 10 of test platform 2.By tighten the end of 4 screw rod of slide bolt 17 2 Individual nut 18, the slide bolt 4 is assemblied in the sliding recess 3 of test platform 2.The fixing bolt 8 and described The upper end of slide bolt 4 is provided with rotational sleeve 19, facilitates the moving freely during bending of developmental tube sample 7.Pass through adjustment Position of the slide bolt 4 in the sliding recess 3, can complete the clamping to different caliber pipe materials.
As shown in figure 3, the middle part of the developmental tube sample 7 is clamped by the clamping of pipe clamping device 5.The pipe clamping device 5 for pair Open type, is realized by 2 half and half clasps 20 and closed, and is fixed using the bolt 23.Set in the pipe clamping device 5 multiple The gripping block 21, and fixed using the fishbolt 22, to realize the test of different caliber pipe materials.The pipe clamping device 5 with The drive link 11 is connected by the bolt 23.After setting relevant parameter in the hydraulic transmission control system 16, drive Move the hydraulic transmission 15 and promote the drive link 11 and the pipe clamping device 5 to move back and forth, realize the developmental tube sample 7 It is reciprocally bending.The drive link 11 is interspersed in 2 adjustable spud piles 12.The adjustable spud pile 12 is by the clamping Ring 24 and the stud 25 are constituted.The two ends of stud 25 connect the holding ring 24 and the test platform respectively 2, and can be adjusted by controlling it to screw in the depth of the test platform 2 between the drive link 11 and the test platform Distance, same horizontal line is in the center of circle for ensuring the drive link 11 and the developmental tube sample 7.
Embodiment 1:Test under the conditions of room temperature, DN150 polyvinyl piping materials minimum memory bending radius
(1) preparation of samples:Intercepted length is used as developmental tube sample for 1000mm polyvinyl piping materials;
(2) tubing is connected:The polyvinyl piping materials processed are connected to hydrostatic pressing bursting test machine;
(3) sample is placed:Suitable gripping block is selected according to developmental tube sample outside dimension first, and by the middle part of developmental tube sample It is clamped in pipe clamping device;Adjust the height of 2 adjustable spud piles, it is ensured that the center of circle of drive link and developmental tube sample is in same level Line;According to the length and external diameter of developmental tube sample, the position of fixing bolt and slide bolt is determined, is completed to developmental tube sample two ends Grip.
(4) bending system is set:The distance of two fixing bolts is set as chord length, with reference to the polyethylene pipe primarily determined that Material stores bending radius, calculates distance mobile in the middle part of tubing.Data above is input to hydraulic transmission control system, and set Reciprocally bending number of times is 10.
(5) cripping test:Hydraulic transmission control system is opened, drives pipe clamping device to make developmental tube sample by hydraulic transmission Reciprocally bending 10 times of generation.
(6) load performance is tested:After cripping test terminates, it is straightened condition to recover developmental tube sample, is filled into developmental tube sample Full water, closed rear startup non-metal pipe hydrostatic pressing explosion bulge test system, according to the requirement of polyvinyl piping materials standard, carries out hydrostatic pressing Performance and in short-term failure pressure are tested.
(7) result judgement:If the hydrostatic performance of polyvinyl piping materials or in short-term failure pressure will below or above standard Ask, then the storage bending radius of setting is decreased or increased, repeat above step, until the critical point of the standard of arrival requirement, now The storage bending radius of setting is the minimum memory bending radius of DN150 polyvinyl piping materials.
Embodiment 2:Under the conditions of 50 DEG C of test, DN100 flexible composite pipe minimum work bending radius
(1) preparation of samples:Intercepted length is used as developmental tube sample for 1200mm flexible composite pipe;
(2) tubing is connected:The flexible composite pipe processed is connected to hydrostatic pressing bursting test machine;
(3) sample is placed:Suitable gripping block is selected according to developmental tube sample outside dimension first, and by the middle part of developmental tube sample It is clamped in pipe clamping device;Adjust the height of 2 adjustable spud piles, it is ensured that the center of circle of drive link and developmental tube sample is in same level Line;According to the length and external diameter of developmental tube sample, the position of fixing bolt and slide bolt is determined, is completed to developmental tube sample two ends Grip.
(4) bending system is set:The distance of two fixing bolts is set as chord length, with reference to the flexible compound primarily determined that Pipe work bending radius, calculates distance mobile in the middle part of tubing.Data above is input to hydraulic transmission control system.
(5) state is adjusted:Hydraulic transmission control system is opened, drives pipe clamping device to make developmental tube sample by hydraulic transmission Under work bending radius state in setting, then flexible composite pipe is full of after water and sealed, open heating system, setting examination Temperature is tested for 50 DEG C, and keeps state 24h.
(6) load performance is tested:After state adjustment terminates, start non-metal pipe hydrostatic pressing explosion bulge test system, according to The requirement of flexible compound pipe standards, carries out hydrostatic performance and failure pressure is tested in short-term.
(7) result judgement:If load performance of the flexible composite pipe under setting work bending radius meets standard requirement, Then continue to bend tubing, reduce bending radius, repeat above step, until the load performance of non-metal pipe reaches standard requirement Critical value (if failure pressure in short-term is just 3 times of nominal pressures), bending radius now is DN100 flexible composite pipes Minimum work bending radius.
Embodiment 3:Verify under room temperature condition, DN150 polyvinyl piping materials minimum memory bending radius
(1) preparation of samples:Intercepted length is used as developmental tube sample for 1000mm polyvinyl piping materials;
(2) tubing is connected:The polyvinyl piping materials processed are connected to hydrostatic pressing bursting test machine;
(3) sample is placed:Suitable gripping block is selected according to developmental tube sample outside dimension first, and by the middle part of developmental tube sample It is clamped in pipe clamping device;Adjust the height of 2 adjustable spud piles, it is ensured that the center of circle of drive link and developmental tube sample is in same level Line;According to the length and external diameter of developmental tube sample, the position of fixing bolt and slide bolt is determined, is completed to developmental tube sample two ends Grip.
(4) bending system is set:The distance of two fixing bolts is set as chord length, the polyethylene provided with reference to manufacturer Tubing minimum memory bending radius, calculates distance mobile in the middle part of tubing.Data above is input to hydraulic transmission control system, And reciprocally bending number of times is set as 10.
(5) cripping test:Hydraulic transmission control system is opened, drives pipe clamping device to make developmental tube sample by hydraulic transmission Reciprocally bending 10 times of generation.
(6) load performance is tested:After cripping test terminates, it is straightened condition to recover developmental tube sample, is filled into developmental tube sample Full water, closed rear startup non-metal pipe hydrostatic pressing explosion bulge test system, according to the requirement of polyvinyl piping materials standard, carries out hydrostatic pressing Performance and in short-term failure pressure are tested.
(7) result judgement:If the hydrostatic performance of polyvinyl piping materials or in short-term failure pressure meet polyvinyl piping materials mark Alignment request, then assert that the minimum memory bending radius for the DN150 polyvinyl piping materials that manufacturer provides is feasible, otherwise infeasible.
Embodiment 4:Under the conditions of 50 DEG C of checking, DN100 flexible composite pipe minimum work bending radius
(1) preparation of samples:Intercepted length is used as developmental tube sample for 1200mm flexible composite pipe;
(2) tubing is connected:The flexible composite pipe processed is connected to hydrostatic pressing bursting test machine;
(3) sample is placed:Suitable gripping block is selected according to developmental tube sample outside dimension first, and by the middle part of developmental tube sample It is clamped in pipe clamping device;Adjust the height of 2 adjustable spud piles, it is ensured that the center of circle of drive link and developmental tube sample is in same level Line;According to the length and external diameter of developmental tube sample, the position of fixing bolt and slide bolt is determined, is completed to developmental tube sample two ends Grip.
(4) bending system is set:The distance of two fixing bolts is set as chord length, the flexibility provided with reference to manufacturer is answered Pipe minimum work bending radius is closed, distance mobile in the middle part of tubing is calculated.Data above is input to hydraulic transmission control system.
(5) state is adjusted:Hydraulic transmission control system is opened, drives pipe clamping device to make developmental tube sample by hydraulic transmission Under minimum work bending radius state in setting, then flexible composite pipe is full of after water and sealed, heating system is opened, if Test temperature is determined for 50 DEG C, and keeps state 24h.
(6) load performance is tested:After state adjustment terminates, start non-metal pipe hydrostatic pressing explosion bulge test system, according to The requirement of flexible compound pipe standards, carries out hydrostatic performance and failure pressure is tested in short-term.
(7) result judgement:If the load performance of flexible composite pipe meets standard requirement, assert what manufacturer provided The minimum work bending radius of DN100 flexible composite pipes is feasible, otherwise infeasible.

Claims (9)

1. a kind of full-scale non-metal pipe minimum bending radius test system, it is characterised in that:Including chamber (1), set The test platform (2) in chamber (1), is also configured with heating system (6) in chamber (1);Set on the test platform (2) Have to drive by hydraulic transmission (15) and do the drive link (11) of linear reciprocating motion, end is provided with drive link (11) is used for Pipe clamping device (5) in the middle part of clamping developmental tube sample (7), hydraulic transmission control system (16) is connected with hydraulic transmission (15), is surveyed Try on platform (2) line centered on drive link (11), it is equidistant be symmetrical arranged several be respectively used to assembling slide bolt (4) and The sliding recess (3) and screw (10) of fixing bolt (8);By adjust position of the slide bolt (4) in sliding recess (3) with Fixing bolt (8) completes the clamping to different bore developmental tube samples (7), and hydrostatic pressing bursting test machine (13) passes through pressure-bearing sebific duct (9) it is connected with the developmental tube sample (7), hydrostatic pressing bursting test machine (13) is connected with water pressure control system (14), passes through hydraulic pressure Control system (14) sets corresponding water pressure test parameter.
2. full-scale non-metal pipe minimum bending radius test system according to claim 1, it is characterised in that:It is described Drive link (11) is fixed on the test platform (2) by two adjustable spud piles (12).
3. full-scale non-metal pipe minimum bending radius test system according to claim 2, it is characterised in that:It is described Adjustable spud pile (12) is made up of holding ring (24) and stud (25), and stud (25) two ends connect clamping respectively Ring (24) and test platform (2).
4. full-scale non-metal pipe minimum bending radius test system according to claim 1, it is characterised in that:It is described The upper end of fixing bolt (8) and the slide bolt (4) is provided with rotational sleeve (19).
5. full-scale non-metal pipe minimum bending radius test system according to claim 1, it is characterised in that:It is described Pipe clamping device (5) is opposite opened, is realized and closed by two half and half clasps (20), and pipe clamping device (5) passes through bolt (23) and drive link (11) it is fixed.
6. full-scale non-metal pipe minimum bending radius test system according to claim 5, it is characterised in that:It is described Multiple gripping blocks (21) are set in pipe clamping device (5), and it is fixed using fishbolt (22), realize the tubing of the different bores of clamping.
7. one kind is using such as the full-scale non-gold of the full-scale non-metal pipe minimum bending radius test system and tests of claim 1-6 Belong to the method for tubing minimum memory bending radius, it is characterised in that comprise the following steps:
(1) preparation of samples:Intercept developmental tube sample (7);
(2) tubing is connected:Developmental tube sample is connected to hydrostatic pressing bursting test machine (13);
(3) sample is placed:It will be clamped in first in the middle part of developmental tube sample (7) in pipe clamping device (5);Then according to developmental tube sample (7) Length and external diameter, determine the position of slide bolt (4) and fixing bolt (8), and completion is gripped to developmental tube sample two ends;
(4) bending system is set:The distance of two fixing bolts (8) is set as chord length, with reference to the developmental tube sample primarily determined that (7) bending radius is stored, distance mobile in the middle part of tubing is calculated, enters data into hydraulic transmission control system (16), and set Fixed reciprocally bending number of times;
(5) cripping test:Hydraulic transmission control system is opened, drives pipe clamping device to occur developmental tube sample by hydraulic transmission It is reciprocally bending;
(6) load performance is tested:After cripping test terminates, it is straightened condition to recover developmental tube sample, and water is full of into developmental tube sample, Start non-metal pipe hydrostatic pressing explosion bulge test system after closed, according to the requirement of developmental tube sample (7) standard, carry out hydrostatic performance Failure pressure is tested in short-term;
(7) result judgement:If the hydrostatic performance of developmental tube sample (7) or in short-term failure pressure are below or above standard requirement, The storage bending radius of setting is then decreased or increased, above step is repeated, until the critical point of the standard of arrival requirement, now sets Storage bending radius be developmental tube sample (7) minimum memory bending radius.
8. method according to claim 7, it is characterised in that:Test specimen is come and gone into bending 10 times in step (5).
9. one kind is full-scale using such as full-scale non-metal pipe minimum bending radius test system system testings of claim 1-6 The method of non-metal pipe minimum work bending radius, it is characterised in that comprise the following steps:
(1) preparation of samples:Intercept developmental tube sample (7);
(2) tubing is connected:Developmental tube sample is connected to hydrostatic pressing bursting test machine (13);
(3) sample is placed:It will be clamped in first in the middle part of developmental tube sample (7) in pipe clamping device (5);Then according to developmental tube sample (7) Length and external diameter, determine the position of slide bolt (4) and fixing bolt (8), and completion is gripped to developmental tube sample two ends;
(4) bending system is set:The distance of two fixing bolts (8) is set as chord length, with reference to the developmental tube sample primarily determined that (7) work bending radius, calculates distance mobile in the middle part of tubing, enters data into hydraulic transmission control system (16);
(5) state is adjusted:Hydraulic transmission control system is opened, drives pipe clamping device to be in developmental tube sample by hydraulic transmission Under the work bending radius state of setting, then developmental tube sample is full of after water and sealed, open heating system, setting experiment temperature Degree, and test temperature state is maintained to wanting seeking time;
(6) load performance is tested:After state adjustment terminates, start non-metal pipe hydrostatic pressing explosion bulge test system, according to experiment The requirement of pipe sample standard, carries out hydrostatic performance and failure pressure is tested in short-term;
(7) result judgement:If load performance of the developmental tube sample under setting work bending radius meets standard requirement, continue Tubing is bent, bending radius is reduced, above step is repeated, until the load performance of non-metal pipe reaches the critical of standard requirement Value, bending radius now is the minimum work bending radius of developmental tube sample.
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