44results about How to "Avoid Electrical Hazards" patented technology

The invention discloses a quick overlapping tool for a draining line applied to ground potential operation, which belongs to the technical field of power operation equipment, comprises a main clamping seat and a secondary clamping seat used for clamping an insulated wire and further comprises a sleeving rod. The main clamping seat is provided with a sliding groove, and the secondary clamping seat is arranged in the sliding groove movably. The front end of the sleeving rod is connected with the secondary clamping seat, and the sleeving rod drives the secondary clamping seat to moveably clamp the insulated wire with respect to the main clamping seat. The main clamping seat is provided with a clamping block used to have the drainage line clamped tightly. The main clamping seat and the second clamping seat have the insulated wire tightly clamped, and when the clamping block has the drainage line clamped tightly, the insulated wire and the drainage line are electrically communicated. The quick overlapping tool for draining line provided by the invention enables that the overlapping of a drainage line can be completed in the form of ground potential operation, which greatly reduces manpower and equipment needed for overlapping. The working time required for the overlapping is also shortened considerably. With the quick overlapping tool of the invention, the effective overlapping can be realized without stopping the power supply, so as to ensure the continuity and reliability of the power supply.

The invention relates to a boiler (1) including a plastic-made main body (2), a heating plate (16) and a lower-part shell body (12). An internal control device (44) is accommodated inside the lower-part shell body. The lower-part shell body (12) comprises a circumferentially upward-stretched inner wall (13). The plastic-made main body (2) comprises a lower part (4b). THe heating plate (16) includes a lower part surface (19a,20a,33) and a circumferential edge (18). An external sealing pat (36) is disposed between the circumferential edge (18) and the lower part (4b). According to the invention, an internal sealing pat (24) is disposed between the inner wall (13) and the lower part surface (19a,20a,33) for preventing any penetration of water into the shell body, especially penetration of leakage water from the external sealing pat (36) due to sealing defect.

The invention discloses an external blocking type cutter for pipeline cutting. The external blocking type cutter is characterized by structurally comprising a driver, a blocking ring, clamps, a blocking part and a cutting slide path, wherein a cutter is mounted in the cutting slide path; the cutting slide path is integrally formed with the blocking ring; the four clamps are uniformly and mechanically connected on the blocking ring, and are matched with pipelines; the blocking ring is formed by fixing two same semicircular structures through the blocking part; the driver is mounted on the blocking ring to drive the cutter; the inner part of the driver is driven by the motor; the motor is mounted and fixed through a pedestal; the motor is matched with a ventilation opening and a radiating fan, and a first partition plate, a movable inclined plate, a connecting rod, a pushing-pulling body, a second partition plate, a sealing part and a spring shaft are arranged in the ventilation opening;the movable inclined plate is mounted in the ventilation opening through a guide wheel, and can be movably in the form of a right trapezoid; a static inclined plate is closer to the radiating fan, sothat dust taken in can be adsorbed in a static mode, and therefore, taken-in dust is not greatly accumulated on the position, close to the motor, of the ventilation opening, and electrical harm is avoided.

The invention relates to the field of electronic circuits, in particular to an electric supply load protection circuit against overvoltage, overcurrent, current leakage, short circuits, surge and lighting strokes. A loaded multifunctional protection circuit of the invention carries out monitor and protection on current, voltage and leakage current of alternating current respectively by an overcurrent protection circuit comprising an overcurrent mutual inductor, a rectifier bridge unit, a resistance voltage dividing unit, an operational amplifier comparison circuit and a thyristor, an overvoltage protection circuit comprising a rectifier bridge unit, a resistance voltage dividing unit, an operational amplifier comparison circuit and a thyristor, and a current leakage protection circuit comprising a zero sequence current mutual inductor, a current leakage protection chip and a thyristor. . When a load access end has the phenomena of overcurrent, overvoltage and current leakage, a tripping device is controlled by a tripping device coil to disconnect an input channel of the alternating current so as to avoid electrical hidden danger and safeguard personal and property safety. Meanwhile, lighting stroke protection, surge protection and faulty connection protection can be carried out through a piezoresistor and an indicator light unit among the fire wire, the zero wire and the earthwire.

The invention relates to a boiler (1) including a plastic-made main body (2), a heating plate (16) and a lower-part shell body (12). An internal control device (44) is accommodated inside the lower-part shell body. The lower-part shell body (12) comprises a circumferentially upward-stretched inner wall (13). The plastic-made main body (2) comprises a lower part (4b). THe heating plate (16) includes a lower part surface (19a,20a,33) and a circumferential edge (18). An external sealing pat (36) is disposed between the circumferential edge (18) and the lower part (4b). According to the invention, an internal sealing pat (24) is disposed between the inner wall (13) and the lower part surface (19a,20a,33) for preventing any penetration of water into the shell body, especially penetration of leakage water from the external sealing pat (36) due to sealing defect.