44results about How to "Reduced chance of crushing" patented technology

A four-foot hollow block with concaved outer side faces of convex feet comprises a block body, wherein a ventilation hole is formed in the center position of the block body, the upper part and the lower port of the ventilation hole communicate with each other, the four sides of the block body are concaved, the four corners of the upper surface and the lower surface of the block body are respectively provided with one overhead convex foot, each convex foot is provided with an outer side face connected with an adjacent block body, the lower section of each outer side face is chamfered, and the upper section of each outer side face is a concaved section; and when the two adjacent four-foot hollow blocks are tightly connected, a protection gap used for preventing the convex feet from being crushed is formed between the concaved sections of the convex feet of the two four-foot hollow blocks. The invention provides a construction method of the four-foot hollow block with the concaved outer side faces of the convex feet. According to the four-foot hollow block with the concaved outer side faces of the convex feet and the construction method of the four-foot hollow block with the concavedouter side faces of the convex feet, the possibility of crushing of the convex feet is effectively reduced, and the service life is prolonged.

The invention relates to the technical field of fuel component manufacturing, in particular to an automatic fuel rod spring compressing device and an automatic fuel rod spring compressing method. The automatic fuel rod spring compressing device comprises a length testing mechanism, a spring compressing mechanism, a substrate, a guide sleeve and a connecting handle, wherein the spring compressing mechanism is fixedly connected with the length testing mechanism through the connecting handle; the spring compressing mechanism and the length testing mechanism are arranged on the substrate; the guide sleeve is arranged on the substrate; the guide sleeve is used for fixing and limiting the spring compressing mechanism and the length testing mechanism. The automatic fuel rod spring compressing method comprises the following steps: measuring displacement of a core block by using the length testing mechanism, further measuring pretightening force to the core block, compressing a spring into a fuel rod casing by using the spring compressing mechanism, tightly compressing the spring, and simultaneously measuring the compression intensity of the spring and the pretightening force to the spring. By adopting the device and the method, the productivity and the product quality level are greatly increased, the rejection rate of compressed springs is reduced to be approximate to 0, meanwhile the spring compression operation process is simplified, and the working intensity of operators is alleviated.

The invention discloses a Euphausia superba living sample collection method and relates to Euphausia superba living sample collection. The technical scheme disclosed by the invention comprises Euphausia superba group searching, sampling time, sampling tools, a collection method and operating processes. The method is characterized in that a scientific fish finder ek500 is used to search Euphausia superba groups in horizontal and vertical directions; the sampling time is 21:00 of every day to 01:00 of the next day from December of every year to February of the next year; collection netting gears are special Euphausia superba living sampling lift nets; the collection method is floating ball suspension off-ship sampling and mobile radio buoys are used for positioning; during the operating processes, the net lowering depth is controlled to be 5-10m below the surface of water and the net lifting speed is controlled below 0.1m / s.