When using the pipe hydrostatic pressure testing machine, in addition to some precautions, there are also maintenance methods for the pipe hydrostatic pressure testing machine.
The pipe instantaneous blasting test refers to a given section of plastic pipe sample, quickly and continuously applying liquid pressure to the inside of the sample, so that the sample ruptures in a short time. Read the pressure value when the sample is broken and calculate its hoop stress. The pressure control system of the hydrostatic testing machine consists of two parts: a pressurizing pipeline and an electrical control. The inlet of the pressurizing pipeline is connected with a pressurizing pump. It is used to pressurize the sample according to the test conditions. The pressure of the sample is detected by the pressure transmitter to transmit the pressure information to judge whether the pressurizing pump needs to be started and pressurized. Each circuit on the control cabinet is equipped with a solenoid valve, when the pressure is constant The corresponding solenoid valve is closed, and when the pressure is insufficient, the solenoid valve is opened for pressure compensation. The pressure compensation method of this test device adopts the advanced pressure compensation method of the same song to keep the pressure range constant. The output pressure of the control cabinet is connected with each sample interface of the constant temperature water tank by a high-pressure hose.
Maintenance method of pipe hydrostatic pressure testing machine
- The host and medium thermostat must be reliably grounded:
- The safety rooms in the various main boxes of this machine have been adjusted before leaving the factory and should not be changed at will. If it is found in the test that there is an overpressure at a constant pressure and cannot fall back, or the pressure cannot be compensated after the pressure is relieved In order to properly adjust:
- Before the test, open the main pressure regulating valve and the first blasting hand valve, close the main pressure relief valve, and then operate according to the operating procedures:
- Fill the water tank of the high-pressure pump with softened water, and add softened water at any time according to the situation. When it is used for the first time or after a long period of inactivity, first open the pressure regulating valve and pressure relief valve of the main road when using it to increase the pressure Work the ticket for a few minutes to drain the air in the tube, and then operate according to the operating procedure;
- If the electric contact pressure gauge and the test pressure value of each branch have to show complicated changes, and there may be leakage, check whether the pressure relief of the corresponding branch and main circuit is closed, or check whether the sample clamping is tightly installed and each Connection status of high-pressure pipe:
- The output high-pressure hose cannot be used to directly lift the sample to avoid damage;
Precautions for operating the pipe hydrostatic pressure testing machine.
- Save the manual for reference. Before using this instrument, be sure to read this manual carefully.
- Do not place the instrument on an unstable place.
- Use the instrument under the specified power supply conditions.
- Do not place any objects on the main power cord of the hydrostatic testing machine, and do not place the instrument where people can step on the power cord.
- If this product uses an extension cord, make sure that the rated current of the original cord and the extension cord are the same.
- Do not move any panel of the instrument, and do not place any objects on the body. Failure to follow this operating procedure will result in the risk of fire or electric shock. Do not spray any liquid on the main body.
