32results about How to "Free expansion" patented technology

The present invention relates to a card-type smart key comprising: a PCB substrate on which components are mounted; and an EMC case which is coupled to the component mounting surface of the PCB substrate, wherein the EMC case is formed by: fixing the component non-mounting surface of the PCB substrate onto a lower plate of a mold after bringing the component non-mounting surface into close contactwith the lower plate; covering the component mounting surface of the PCB substrate with an upper plate of the mold, leaving a preset space; and inputting a molding material into the preset space.

The invention discloses a stretching-straightening device for an online heating-straightening process of a magnesium alloy extrusion material, comprising a stretching-straightening device and a heating device. The stretching-straightening mechanism comprises a bracket, a stretching drive mechanism and a clamping drive mechanism. Double rails are arranged on the bracket. The rail is provided with a chuck I and a chuck II which are matched with the surfaces of the rails in a sliding manner. At least one chuck is capable of sliding forward and backward along the rail direction with the action ofthe stretching drive device. The chuck I and the chuck II are used for generating clamping forces via the clamping drive mechanism respectively. The heating device comprises a lifting mechanism and aheating mechanism. The heating mechanism comprises a positive clamping electrode, a negative clamping electrode and a transformer. The lifting mechanism is arranged under the double rails. The heating device of the stretching-straightening device is capable of guaranteeing that the extrusion material is expanded freely during heating without generating heat stress. The bending phenomenon caused by the heat stress and the instability phenomenon caused by the combined action of the heat stress and the self gravity are avoided via effective support during heating.

The present invention relates to an oil collection tank having an expansion ring, and an application thereof. The oil collection tank comprises a liquid collection cap, a liquid collection groove, a liquid collection groove position limitation device, a tower ring, a filler plate, a position limitation expansion ring, a bracket, a liquid collection channel, a pulling-out hopper and a support rib plate. One end of the liquid collection groove is fixed on the liquid collection channel, and the other end is fixed on the filler plate. The liquid collection groove position limitation device is arranged on the lower part of the filler plate connected to one end of the liquid collection groove. The lower part of the other end of the filler plate is overlapped on the tower ring. The upper part of the filler plate is connected with the position limitation expansion ring. The oil collection tank of the present invention has the following advantages that: excellent functions of gas distribution and liquid collection are provided, staying time of the collected liquid can be reduced, occurrence of coking can be prevented, the oil collection tank can freely expand at a high temperature without limitation of operating temperature, and normal operation of the tower under the high temperature operating condition is ensured.

The invention discloses an active optical cable which comprises a cable body, wherein the cable body comprises an optical transmission cable, an optical contactor and a photoelectric conversion contactor, wherein the optical contactor is connected with one end of the optical transmission cable, and the photoelectric conversion contactor is connected with the other end of the optical transmission cable and comprises a photoelectric conversion component and a signal processing chip. The active optical cable disclosed by the invention can be completely used as a finally-assessed copper wire in the current optical network system, so that a whole path between a local side and a user terminal is an optical path, and optical signals can be directly transmitted to the user terminal, therefore, the service bandwidth of a user can be greatly improved, and the performance of the optical network system can be played completely.

The invention relates to a boiler coal economizer and belongs to the technical field of boiler corollary equipment. The boiler coal economizer comprises guard plates, supporting beams, pipe clamps and a coiled pipe system. A flue is formed by the guard plates in an enclosed mode, and the coiled pipe system is mounted in the flue. The supporting beams are horizontally erected on the guard plates. The pipe clamps are vertically fixed to the supporting beams. The coiled pipe system comprises a set of coiled pipe bundles which are disposed at the same height and are arranged at intervals. The coiled pipe bundles are fixed by the pipe clamps. The coiled pipe system is provided with locating plates. The locating plates are arranged adjacent to the pipe clamps. Connecting round steel penetrates through the locating plates. The coal economizer is simple in structure and convenient to mount and repair; not only is the rigidity of the whole pipe system guaranteed, but also free expansion of the coiled pipe system is ensured; besides, heat transfer is not affected, and the problem that the pipe bundles of the coal economizer are too high and consequently instability and deformation are caused easily is solved.

The invention relates to a thermal compensation oil tank. It comprises holding cap, holding tank, holding ditch and drawing bucket; one end of holding ditch is fixed jointed, and the other end is freely jointed, the two sides of holding ditch are equipped with stop in cross direction; one end of holding tank ais fixed jointed and the other end is freely jointed, the two sides of holding tank are equipped with stop in cross direction; the holding cap is installed between holding tank. The thermal compensation oil tank possesses good gas distribution and liquid collection property, reduces liquid retention time, avoids coking, and expands freely under high temperature and gurantee normal operation of tower under high temperature.

The invention provides communication devices and a communication system based on a multi-carrier transmission mode. The communication devices are contained in the communication system which carries out information exchange among the communication devices in the multi-carrier transmission mode using a series of subcarriers. Each communication device comprises a sending data generating part, the sending data generating part generates used frequency band information which indicates a used frequency band selected from a plurality of frequency bands formed by division of a whole frequency band assigned on the communication system, and the used frequency band is used for carrying out mutual transmission of data information among the communication devices, wherein the communication devices send the used frequency band information through using of a set specific frequency band in the frequency bands, and the specific frequency band can be changed along with time and is used for being switched to another frequency band of the frequency bands.

The invention relates to a device for producing cellulose staple fibers, comprising a cutting device (1) for cutting cellulose filaments into staple fibers, and a liquid delivery device (2) for conveying the staple fibers. The device according to the invention is characterized in that the liquid delivery device (2) has a part in the form of a siphon (4).