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 pressure testing of various plastic pipes and corrugated pipes. A square steel block is placed on the sample, and a gradually increasing force is applied by the hydraulic system, causing the sample to be compressed across its surface. This process helps evaluate the mechanical properties of the specimen by observing changes in outer diameter.

This equipment meets the requirements of 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 control, accurate measurement of outer diameter changes, user-friendly operation, and reliable results. As a result, it is widely used in quality control and material testing applications.

Electrician Casing Pressure Testing Machine

Installation and Usage:

1. Loosen the fasteners, clean the surface of the testing machine, and re-lubricate the moving parts with thin oil.

2. Adjust the base so that it is level and stable.

3. Place the test piece in the center of the lifting platform. Manually press the jack (make sure the bleed valve is closed first) to bring the test piece 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 calibrate the reading to zero.

5. Select an 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. The sample will come into contact with the indenter (square iron block). Before the top of the indenter touches the sample, adjust the dial gauge to the working platform. After securing the tightening screw, use the fine adjustment knob to make contact with the probe until the dial indicator reads “0.”

7. Continue raising the platform until the top of the indenter makes contact with the sample and apply the required force 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. This difference should not exceed 25% of D1.

9. Loosen the fastening screw, let the adjustment rod drop, and release the return valve stem to allow the platform to slowly descend. Due to the damping effect of the hydraulic system, you may need to manually lower the platform to its lowest position.

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

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