47results about How to "Eliminate leakage hazards" patented technology

The invention provides a power supply detection circuit and an electronic product. The power supply detection circuit comprises a power supply end, a first detection circuit, a second detection circuit, a third detection circuit and a control circuit. The power supply end comprises a fire line, a zero line and a ground line. The first detection circuit comprises a first protection circuit and a first optocoupler circuit. The control circuit controls the on-off of the fire line, the zero line and the ground line according to an output signal of the first optocoupler circuit. The second detection circuit comprises a second protection circuit and a second optocoupler circuit. The control circuit controls the on-off of the fire line, the zero line and the ground line according to an output signal of the second optocoupler circuit. The third detection circuit comprises a third protection circuit and a third optocoupler circuit. The control circuit controls the on-off of the fire line, the zero line and the ground line according to an output signal of the third optocoupler circuit. According to the power supply detection circuit and the electronic product, the on-off of the fire line, the zero line and the ground line is controlled according to the output signals of the optocoupler circuits, which eliminates leakage hazards, improves electricity safety, and ensures electricity safety.

The invention discloses an integral casting process for a reinforced concrete wastewater tank in predrilling engineering. The integral casting process comprises the following steps of a, construction of a foundation and a bedding layer, digging a foundation pit, and casting the concrete bedding layer after determining that the foundation bearing force meets the design requirements; b, manufacturing and installation of reinforced bars, manufacturing and installing on site, wherein the overlapping length of the reinforced bars should not be less than 40 times of the diameter (mm) of each reinforced bar, and the overlapping area of the reinforced bars same in cross section should not be more than 50% of the total area; c, supporting of die plates, binding the die plates into the shapes of the bottom and the wall of a concrete tank; d, casting of concrete, after completing the construction of the reinforced bars and the die plates, carrying out the casting construction of concrete, firstly casting the bottom of the concrete tank and the wall with the height less than 1m, leveling the top of the wall of the concrete tank, and reserving no step to complete the first time of casing; casting the residual wall of the concrete tank in at least one hour after completing the first time of casting; and e, removal of the die plates, removing the die plates when the strength of the cast concrete being more than 1.2MPa. The integral casting process has the advantages that the construction time of the wastewater tank in the predrilling engineering is reduced, the construction period of the whole predrilling engineering is shortened, the condition of drilling machines not waiting for well fields is ensured, the construction seams are not reserved in the construction, and the leakage problem caused by the construction seams is avoided.