Electrician casing pressure testing machine "installation and use method" - Huaqiang Electronic Network

Electrical casing pressure tester structure:

The testing machine is composed of a base, a hydraulic mechanism, a lifting platform and a dial gauge deformation measuring device.

Applicable to a variety of plastic pipes, plastic corrugated pipes, etc. for pressure test, a square steel block is placed on the sample, and a slowly increasing force is applied by the hydraulic mechanism, and the sample is pressed by a large number of surface parts. Change the outer diameter and check the mechanical properties of the specimen. meets the

JG/T3050 "Insulation Electrical Bushings and Fittings for Construction", GB/T14823.2 "Special Requirements for Electrical Installation Pipes - Rigid Insulation Material Flat Pipes" and ZBG33008 "Polyethylene Plastic Corrugated Wire Pipes" and other requirements. Compared with other tensile testing machines, this testing machine has the characteristics of constant pressure, accurate change of outer diameter, convenient operation, intuitive and reliable. Therefore, the application is becoming more and more extensive.

Electrician casing pressure testing machine

Installation and use:

1. Loosen the ligature, wipe the surface of the test machine clean, and re-inject the thin oil into the moving part.

2. Adjust the base so that the base is basically level.

3. Place the test piece in the center of the lifting platform, press the jack by hand (Note: Be sure to close the bleed valve first) to make the test piece contact with the square iron block. At this time, do not press the product pressure, then adjust the dial indicator. , use the dial indicator pointer to zero.

4. Turn on the display power and adjust the value to zero.

5. Select different pressure values ​​depending on the type of catheter.

6. First measure the outer diameter D1 of the sample, place the sample on the lifting plate, tighten the jack return valve stem, and pull the handle to raise the lifting plate. The sample is in contact with the indenter (square iron block), but Before the top of the indenter is in contact with the test piece, adjust the dial indicator to the working platform. After tightening the tightening screw, adjust the fine adjustment knob to contact the probe until the dial indicator is at the “0” position.

7. Continue to raise the plate until the top of the indenter comes into contact with the test piece, and then continue to rise to the required force within 30 seconds.

8. Record the dial gauge reading after one minute. This value is the difference between the outer diameter D1 of the specimen and the outer diameter D2 of the flattened portion, and should not be greater than 25% of D1.

9. Loosen the fastening screw, make the adjustment rod fall, and then release the return valve stem, so that the lifting and lowering plate will slowly descend. Due to the damping effect of the jack, you may need to press the plate down by hand to reduce to the lowest point. .

10. After another one minute, use the measuring tool such as vernier caliper to measure the outer diameter D3 of the sample to be flattened. The difference between D3 and D1 should not be greater than 10% of D1.

11. Then, check the surface of the sample for cracks.