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
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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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