48results about How to "Guaranteed grounding" patented technology

The invention provides a steel wire quenching heat treatment method. In steel wire quenching equipment, the two sides of a conductive heating roller are provided with wire pressing rollers, tension between the steel wire and the conductive heating roller is increased, so that normal contact between the steel wire and the conductive rollers is ensured when the steel wire moves; at the same time, a certain amount of electrolyte is added into a water-bath groove, so that conductive performance of an aqueous solution is improved, and a sparking problem between the steel wire and the conductive heating roller is solved; polymeric additives with different molecular weight including acrylic acid, sodium nitrate, common salt and an emulsifier is also added into the water-bath groove, so that the generation of martensite is avoided when the steel wire passes through the water-bath groove in a low speed, and quenching effect of the steel wire is ensured; and metal pipes of pipe fittings are all connected to the ground, so as to ensure application safety, and preventing accidents from happening.

The invention discloses an electronic expansion valve which comprises a valve body (1) and a coil (2), wherein the coil (2) is connected with a buckle (4) conductively connected with the valve body (1), the coil (2) comprises an electromagnetic polar plate (21), a stator housing (22) which is in conductive contact with the electromagnetic polar plate (21) and a non-conductive plastic housing (23) wrapped on the outer part of the stator housing (22), the buckle (4) is in further conductive contact and connection with a transition part, and the transition part is in conductive contact with the stator housing (22). Due to the adoption of a structure design, the electronic expansion valve can ensure that parts inside the coil (2) are grounded, therefore, the coil (2) can be prevented from being damaged due to a high-voltage or ultra-high voltage electric signal.

The invention discloses a grounding device for a lamp, which comprises two grounding terminals and screws; the grounding terminal comprises a pressing piece and two limiting arms symmetrically arranged on the pressing piece. There is a through hole on the pressing piece, and the two limit arms are bent and extended towards the same side of the pressing piece; the screws pass through the through holes of the pressing piece of the two grounding devices in turn and are screwed with the threaded holes; the limit of the two grounding terminals The direction of the arms is opposite, and the pressing piece of one of the grounding terminals is located between the two limiting arms of the other grounding terminal; the ground wire is pressed tightly between the pressing pieces of the two grounding devices. The grounding terminals are used in pairs, the limit arms of the two grounding terminals are facing oppositely, and the grounding wires are pressed tightly by the pressing pieces of the two grounding terminals, which can effectively prevent the grounding wire from rotating away from the metal post during assembly, and realize the grounding wire and the metal post conveniently and quickly. The connection between the metal posts; at the same time, the contact area between the pressing piece and the ground wire is large, which can ensure the effective grounding of the lamp. At the same time, the invention also discloses a lamp using the above lamp grounding device.

The invention provides a shielding device and a manufacturing method thereof. The shielding device comprises a plate-like cover and a frame, wherein the cover is provided with a top which is provided with at least one projected joint part projecting towards the frame; the frame is provided with a top and a side edge which downwards extends from the top, the top is provided with at least one joint interface corresponding to the projected joint parts of the cover, and the peripheral outline of each joint interface is the same as the peripheral outline of the corresponding projected joint part; and the projected joint part of the cover is jointed with the corresponding joint interface of the frame in an interference extrusion way to form an assembling structure of the cover and the frame. With the shielding device and the manufacturing method thereof, no side edge of the cover needs to be manufactured, thus the side edge space of the shielding device is prevented from being occupied, the cost of materials for manufacturing the side edge of the cover is saved, and zero fit-up gap is realized between the cover and the frame so that the grounding property and the shielding property of the shieldingdevice are ensured.