Detection method for determining short-time failure hydraulic pressure of bamboo composite pressure tube

A bamboo composite pressure pipe and detection method technology, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the inaccurate hydraulic pressure results of short-term failure, reduce the test condition requirements of large-diameter bamboo composite pressure pipes, etc. problem, to achieve short-term failure of accurate water pressure, reduce the pressure time, and reduce the effect of interference

Active Publication Date: 2015-12-09
ZHEJIANG XINZHOU BAMBOO BASED COMPOSITES TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a detection method for determining the short-term failure hydraulic pressure of the bamboo composite pressure pipe, wherein through its key process steps such as the detection steps of the sample, The selection rules of samples are improved. Compared with the existing technology, it can effectively solve the problem of inaccurate water pressure results caused by short-term failure of the bamboo composite pressure pipe due to damage during the detection process, and this method avoids direct detection of large pipe diameters. Bamboo composite pressure pipe greatly reduces the test condition requirements for large-diameter bamboo composite pressure pipe, and can achieve the technical effect of simplifying actual detection

Method used

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  • Detection method for determining short-time failure hydraulic pressure of bamboo composite pressure tube

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Experimental program
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Effect test

Embodiment 1

[0025] figure 1 Shown is a schematic flow chart of the short-time failure hydraulic method for detecting bamboo composite pressure pipes.

[0026] The nominal diameter of bamboo composite pressure pipe G1 to be tested is D N is 300mm, and the pressure level is 0.8MPa, then G1 is the sample S1.

[0027] Place S1 in an air environment at 25°C for 16 hours, and then attach a sealing device to both ends of the sample S1. The sealing device has a sealing plug, and the edge of the sealing plug in contact with S1 is chamfered. Support the sealing device so that the sample S1 is in a horizontal state, and the sealing device is a constraint end sealing device; then, connect the sealing device with a pressurized system, the pressurized system is an electric pressure test pump, and then fill the sample with Water, so that the sample is filled with water and the air is exhausted; the time for the sample to be filled with water from the beginning of water to full of water is 5 minutes; ...

Embodiment 2

[0031] The nominal diameter of bamboo composite pressure pipe G2 to be tested is D N The diameter is 800mm, the pressure level is 0.6MPa, and the measured ring stiffness is 8240N / m 2 , let G2 be the sample S2. In addition, the selected scaling ratio is 2:1 (that is, the scaling factor λ=D N :D N '=2) the bamboo composite pressure pipe is used as the reduction pipe G2' of the pipe G2, and the nominal diameter D of the pipe G2' N ’ is 400mm, the pressure level is 0.3MPa, and the ring stiffness is 4120N / m2 , take G2' as sample S2';

[0032] Place S2 and S2' in an air environment of 25°C for 16 hours, and then clamp sealing devices on both ends of samples S2 and S2' respectively, and support the sealing devices so that both samples S2 and S2' are in a horizontal state, so The sealing devices are all restraining end sealing devices; then, the sealing device is communicated with a pressurizing system, which is a nitrogen cylinder pressure supply system with a pressure regulator ...

Embodiment 3

[0035] Bamboo composite pressure pipe G3 to be tested, nominal diameter D N is 800mm, the pressure level is 0.6MPa, and the measured ring stiffness is 8240N / m 2 , take G3 as sample S3. In addition, select the bamboo composite pressure pipe reduction ratio pipe G3' of pipe G3, the nominal diameter D of the G3' pipe N ’=200mm, the reduction ratio is 4:1 (that is, the scale factor λ=D N :D N '=4), the nominal diameter, pressure level, and ring stiffness ratio of both G3 and G3' are 4, and G3' is taken as the sample S3';

[0036] Place S3 and S3' in an air environment of 25°C for 16 hours, then clamp sealing devices on both ends of samples S3 and S3' respectively, and support the sealing devices so that both samples S3 and S3' are in a horizontal state, so The sealing devices are all restraining end sealing devices; then, the sealing device is communicated with the pressurized system, and then the samples S3 and S3' are respectively filled with water, so that the samples S3 an...

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Abstract

The invention discloses a detection method for determining the short-time failure hydraulic pressure of a bamboo composite pressure tube. The method comprises the following steps: clamping a sealing device on a test tube, communicating the test tube with a pressurization system, carrying out water filling, and pressurizing the test tube until failure, wherein the bamboo composite pressure tube used as the test tube can be a bamboo composite pressure tube to be detected, and can also be a bamboo composite pressure tube reduction tube corresponding to the bamboo composite pressure tube to be detected. Sample detection steps and a sample selection rule are improved in the invention; and compared with the prior art, the method disclosed in the invention effectively solves the problem of short-time failure hydraulic pressure result inaccuracy caused by loss of damages of the bamboo composite pressure tube in the detection process, avoids direct detection of large-caliber bamboo composite pressure tubes, greatly reduces the test condition requirements of the large-caliber bamboo composite pressure tubes, and realizes the simplification effect of practical detection.

Description

technical field [0001] The invention belongs to the technical field of bamboo composite pressure pipes, and more specifically relates to a detection method for determining short-term failure hydraulic pressure of bamboo composite pressure pipes. Background technique [0002] Bamboo material is a renewable green environmental protection material. In recent years, with the increasing maturity of bamboo composite pressure pipe related technologies (for example, Chinese patent documents CN101571213A, CN202327397U), bamboo composite pipe, as a pipeline that can withstand a certain pressure, is used in water supply and drainage. It can generally replace traditional pipes such as PVC pipes, polyethylene pipes, glass steel pipes, cement pipes, spiral welded pipes, and ductile iron pipes in engineering, farmland irrigation, and petrochemical anticorrosion, and has a good application prospect. [0003] Under the action of internal water pressure, any one of the following situations in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
CPCG01N3/12
Inventor 叶柃朱鑫张淑娴牛琳
Owner ZHEJIANG XINZHOU BAMBOO BASED COMPOSITES TECH
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