4results about How to "Guaranteed stretching effect" patented technology

This utility model discloses a roller accessory for a guide rail protective cover, belonging to the technical field of protective cover technology. It includes a mounting plate with two connecting feet fixedly connected to its bottom end. Each connecting foot has a rotating hole, and a shaft is rotatably connected within these holes. A roller assembly is fixedly connected to the circumferential surface of the shaft, and the roller assembly is located between the lower side of the mounting plate and the two connecting feet. In this utility model, the mounting plate is connected inside the guide rail protective cover, and both ends of the shaft are rotatably connected to the two rotating holes on the connecting feet. When the protective cover extends or retracts on the guide rail, the roller assembly contacts the guide rail and rolls. During the rolling process, the rolling force is always concentrated at the rotating connection point between the shaft and the two connecting feet, thus ensuring stable rolling regardless of the width of the rollers. This guarantees the extension and retraction effect of the guide rail protective cover and avoids wear caused by direct friction between the non-rotating rollers and the guide rail.

A flexible, stretchable grounding device, belonging to the field of marine technology, includes a grounding structure with connecting shafts at both ends. The grounding structure comprises two sleeves, with a braided wiring strip placed between them. Wire ends are fixedly installed at both ends of the braided wiring strip, and a fixing pad is fixedly installed inside the sleeves. The connecting shafts are fixed between the equipment body and the ship structure using bolts and tightened. Since the sleeves are made of multiple single-wire braids, they have a certain degree of tensile strength, allowing for some displacement when connecting the equipment body and the ship structure. This avoids the possibility of the yellow-green grounding wire breaking off from the equipment body or ship structure without requiring sufficient displacement margin. Furthermore, its surface is coated with a tin-zinc anti-corrosion coating, ensuring conductivity, tensile strength, and good corrosion resistance.

This invention discloses a liquefied gas storage tank and a vessel for transporting liquefied gas. The liquefied gas storage tank includes a main shielding layer that contacts the liquefied gas on one side, a secondary shielding layer disposed on the other side of the main shielding layer, and at least one liquefied gas loading / unloading tower. The base of the liquefied gas loading / unloading tower includes: a lower part of the base body fixedly connected to the bottom wall; a corrugated plate of the secondary shielding layer connected to the lower part of the base body; and a closed end at one end of at least one corrugation of the secondary shielding layer facing the lower part of the base body. An upper part of the base body has mounting holes in the main shielding layer, through which the upper part of the base body is fixedly connected to the lower part of the base body. By opening mounting holes on the flat surface of the main shielding layer to achieve the installation of the pump tower base, the integrity of the corrugated structure of the main shielding layer is fully preserved, ensuring the expansion and contraction performance of the main shielding layer in low-temperature environments and improving the low-temperature sealing reliability of the storage tank.

The utility model relates to nylon filament stretching technical field, specifically disclose a kind of nylon filament variable-speed temperature control stretching device, including device baseplate, the side of device baseplate is connected with guide roller by bearing rotation, the sidewall of device baseplate is equipped with the stretching component for to filament stretching, the one end of device baseplate is equipped with the cleaning component for to filament cleaning;The stretching component includes low-speed roller, the low-speed roller is installed in the sidewall of device baseplate, the one end of low-speed roller is fixed with driving wheel, the outer wall of driving wheel is connected with belt.The stretching component of being set, driving wheel rotates by belt and drives driven wheel to rotate when driving wheel rotates, the rotational speed of driven wheel is greater than driving wheel, and further synchronous drive high-speed roller rotates, under the cooperation of low-speed roller, can be stretched to filament, and the rotational speed of stepper motor is controlled by controller, the rotational speed of high-speed roller and low-speed roller can be adjusted, the effect of synchronization can be realized, guarantee the stretching effect of long line.