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

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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. It is designed for various types of plastic pipes and corrugated plastic pipes for pressure testing. A square steel block is placed on the sample, and a gradually increasing force is applied by the hydraulic mechanism. The sample is pressed across its surface, and the outer diameter is measured to evaluate its mechanical properties. This equipment meets standards such as 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." Compared to other tensile testing machines, this model offers constant pressure, accurate outer diameter measurement, user-friendly operation, and reliable results, making it widely used in quality control processes.

Electrician casing pressure testing machine

Installation and usage instructions:

1. Loosen the securing straps, clean the surface of the testing machine, and reapply thin oil to moving parts.

2. Adjust the base to ensure it is level.

3. Place the test specimen in the center of the lifting platform. Manually press the jack (make sure the bleed valve is closed first) to bring the specimen into contact with the square iron block. At this point, do not apply pressure yet. Then adjust the dial indicator and set the pointer to zero.

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

5. Select the appropriate pressure value based on the type of pipe being tested.

6. Measure the initial outer diameter D1 of the sample. Place the sample on the lifting plate, tighten the return valve stem, and pull the handle to raise the platform. Once the sample makes contact with the indenter (square iron block), before the top of the indenter touches the sample, adjust the dial indicator to the working platform. After tightening the screw, use the fine adjustment knob to make contact with the probe until the dial reads “0.”

7. Continue raising the platform until the indenter tip contacts the sample, then increase the force gradually within 30 seconds.

8. Record the dial gauge reading after one minute. This value represents the difference between the original outer diameter D1 and the flattened outer diameter D2. The difference should not exceed 25% of D1.

9. Loosen the fastening screw, let the adjustment rod drop, and release the return valve stem. The lifting platform will slowly descend due to the damping effect of the hydraulic system. You may need to manually press it down to the lowest position.

10. After another minute, use a vernier caliper or similar tool to measure the final outer diameter D3 of the flattened sample. The difference between D3 and D1 should not be more than 10% of D1.

11. Finally, inspect the surface of the sample for any cracks or defects.