Introduction of various types of electric pressure test pumps from manufacturers

The careful installation and construction of the equipment is one of the important steps for the long-term trouble-free operation of Baozheng equipment. In addition to the safety valve allocated to the high pressure part of the hydraulic end of the pump equipment, (the safety valve is mainly used to prevent the pressure in the hydraulic system from being too high, resulting in the overpressure operation of the pressure test pump). Adequate attention should be paid to the safety protection devices required in the process of maintenance, inspection, etc. (such as handrails, brackets, protective covers, etc.) to avoid unnecessary personal injury and death accidents.

It is recommended that the safety protection device and the safety alarm device of the equipment be interlocked when possible. Once any situation that affects the operation or causes harm to the human body occurs, the power of the equipment will be cut off and the operation will be forced to stop. The power and supply can not be restored until the protective devices and safety devices are restored, and the electric pressure test pump is put into operation again.

There are mainly the following types of pressure transmitters for pressure pumps:

One is that the pressure of the electric pressure test pump goes up, but the transmitter cannot go up. In this case, first check whether the pressure interface is leaking or blocked. If it is not confirmed, check the wiring method and check the power supply. If the power supply is normal, simply pressurize to see whether the output changes, or check whether there is output at the zero position of the sensor. If there is no change, the sensor has been damaged, which may be due to damage to the instrument or other problems of the entire system;

The second is that the output of the pressure transmitter of the pressure test pump does not change, and the output of the pressure transmitter changes suddenly, and the zero position of the pressure relief transmitter cannot be returned. It is very likely that it is a problem with the pressure sensor sealing ring. Commonly, due to the specifications of the sealing ring, the sealing ring is compressed into the pressure port of the sensor to block the sensor after the sensor is tightened. The pressure medium cannot enter when the pressure is increased, but the sealing ring suddenly rushes when the pressure is high, and the pressure sensor is under pressure. Variety. The best way to troubleshoot this kind of malfunction is to remove the sensor and directly check whether the zero position is normal. If the zero position is normal, replace the sealing ring and try again;

The third is the unstable output signal of the transmitter. This failure may be a problem of the pressure source of the pipeline electric pressure pump. The pressure source itself is an unstable pressure. It is very likely that the anti-interference ability of the instrument or pressure sensor is not strong, the sensor itself is very vibrating and the sensor is faulty; the fourth is the large deviation between the transmitter and the pointer pressure gauge. Deviation is a normal phenomenon, just confirm the normal deviation range;

The fourth type of fault that is easy to appear is the influence of the installation position of the differential pressure transmitter on the zero output. Due to the small measuring range of the differential pressure transmitter, the sensing element in the transmitter will affect the output of the differential pressure transmitter. During installation, the pressure-sensitive part of the transmitter should be perpendicular to the direction of gravity. After installation, adjust the zero position of the transmitter to the standard value.