Electrical casing pressure testing machine

  Jg3050-7  Electrical casing pressure tester 1, Foreword of electrical casing pressure testing machine
 & Nbsp& Nbsp This testing machine is suitable for pressure testing of various plastic pipes and plastic bellows
Place a cube steel block on the sample, and apply a slowly increasing force by the lever and weight
Measure the change of the outer diameter at the pressure of the sample with a large range surface sub meter, and check the mechanical properties of the sample
Comply with GB / t14823 2 special requirements for conduits for electrical installation & mdash; flat conduits made of rigid insulating materials, JG / t3050 insulating electrical bushings and accessories for buildings and zbg33008 polyethylene plastic corrugated conduit, etc

Compared with other tensile and pressure testing machines, this testing machine has the characteristics of constant pressure, accurate measurement of outer diameter change, convenient operation, intuitive and reliable
Therefore, it is more and more widely used

2 technical parameters of electrical casing pressure testing machine
Maximum pressure: 5000n
Supporting weight: 1250n (9 pieces in total)
Pressure accuracy: & plusmn; 1%
Indenter specification: 50 * 50mm
Measurement range of pipe diameter change: 0-30mm,
Measurement accuracy: 0
01mm
Size of lifting plate: 252 * 240mm
Lifting range: 90mm
Overall dimension: length * width * height ,& Nbsp 726*340*545mm
Weight: 70kg
3 structure of electrical casing pressure tester
The testing machine is composed of base, lever mechanism, Jack and dial gauge deformation measuring device

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Installation and use of electrical casing pressure testing machine
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1 loosen the binding object, wipe the surface of the testing machine, and refill the moving part with thin oil
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4 adjust the base plate to the lowest point, and adjust the base plate to the lowest point
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3 hang the hook seat on the lever and adjust the balance screw to move the balance weight to make the lever horizontal
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4 during transportation, the weight plate and the hook may be separated
Please screw the hook into the weight plate, hang the hook on the hook seat, make the lever fall on the lever support, and adjust the height of the lever support so that the pressurized bearing does not contact the top of the indenter
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5 according to different types of conduits, add specified weights (including hook disc)
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5 first measure the outer diameter D1 of the sample, put the sample under the lifting plate, tighten the oil return valve rod of the jack, pull the handle to raise the lifting plate, and the sample contacts the indenter
However, before the top of the indenter contacts the pressurized bearing, make the adjusting rod close to the measuring head of the dial indicator After tightening the fastening screws, adjust the fine tuning knob to contact the probe until the dial indicator is pointing at &rdquo
0” Bit
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7 continue to raise the plate until the top of the indenter contacts the pressurized bearing, and then continue to rise to the lever level (slightly higher) within 30s
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8 after 1min, write down the reading of the dial indicator
This value is the difference between the outer diameter D1 of the sample and the outer diameter D2 of the flattened part, which shall not be greater than 25% of D1
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9 loosen the fastening screw to lower the adjusting rod, and then loosen the oil return valve rod to lower the lifting flat plate slowly due to the damping effect of the jack It may be necessary to press the plate down by hand to reach the lowest point
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10 after another 1min, use vernier caliper and other measuring tools to measure the outer diameter D3 of the flattened part of the test sample
The difference between D3 and D1 shall not be greater than 10% of D1
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11 then, check the surface of the sample for cracks
5 precautions
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1 after the test, wipe the indenter, plate, weight, etc
, and keep the weight in a dry place

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2 except for the test needs, in other cases, the adjusting rod must be lowered, the fine-tuning knob must be at the lowest point, and the dial gauge probe must be in a free state
Improper use will damage the dial indicator