5results about How to "Avoid Repeated Fragmentation" patented technology

The invention belongs to the field of casing running equipment and facilities, and provides a composite bearing type casing centralizer which comprises a pair of hoops and a plurality of elastic fin assemblies, each hoop comprises a sleeve body, a mounting opening, a welding positioning plate, an upper hooping piece and a lower hooping piece, and each elastic fin assembly comprises an end piece, an inner elastic piece and an outer elastic piece. A cantilever plate and an impeller set are arranged on the inner side of the inner elastic piece, the axis of the impeller set faces the side face of the inner elastic piece, the inner elastic piece and the outer elastic piece are each of a double-arch-shaped structure, the arch directions of the inner elastic piece and the outer elastic piece are opposite, and double-row balls and single-row balls are arranged on the sides, back on to the center of the sleeve, of the inner elastic piece and the outer elastic piece correspondingly. The double-row balls are used for supporting the outer elastic piece and reducing the friction force in the direction of the lower sleeve, and the single-row balls are used for reducing the friction force in the direction of the lower sleeve. The centralizer is reasonable in design, good in abrasion resistance and centralizing effect, beneficial to promoting the circulation effect of underground circulation media, capable of promoting the casing running progress through the well environment and suitable for large-scale popularization.

The utility model discloses an asphalt milling material crushing and screening device which comprises a first crusher and a second crusher, a first crushing roller and a first screen are arranged in the first crusher, and a discharge port of the first crusher is connected with a feed port of the second crusher through a first elevator; a first smashing roller and a first screen are arranged in the first smashing machine, a second smashing roller and a second screen are arranged in the second smashing machine, a discharging port and a feeding port of the second smashing machine are connected through a second elevator, the first smashing roller is composed of two conical rollers which are oppositely arranged, and the second smashing roller is composed of two straight groove star-shaped rollers which are arranged side by side. The device is simple in structure and convenient to use, greatly enhances the stripping capacity of the asphalt milling material, and can perform secondary or multiple times of crushing, so that the grinding and crushing of the asphalt milling material are more sufficient, the required grain composition can be achieved, the repeated crushing of qualified fine materials is avoided, the crushing efficiency is improved, and the energy is saved.

This utility model relates to the technical field of waste recycling devices, specifically a waste recycling device for autoclaved aerated concrete (AAC) blocks. It includes a frame, movable frames, and a screening assembly. A primary crushing assembly is mounted on the frame. Two movable frames are detachably mounted on the frame, each with a detachable secondary crushing frame and a secondary crushing assembly. The screening assembly includes two base plates arranged side-by-side on the frame, multiple springs on each base plate, a screening frame mounted on the springs, multiple screening rods arranged side-by-side on the screening frame, and a vibration generator mounted on the screening frame. This utility model uses the primary crushing assembly to initially crush the waste. The crushed waste is then filtered through multiple screening rods. Larger particles are further crushed by the secondary crushing assembly, preventing repeated crushing and increasing the crushing speed.

The utility model discloses a glass breaking device which comprises a breaking device body and a breaking assembly, a shifting assembly is arranged on one side of the breaking device body, and a discharging frame is installed at the top end of the breaking device body. The crushing assembly is arranged in the crushing device body and used for crushing glass. Glass is broken in a hammering mode, the screening net is arranged to ensure that broken glass meeting the specification can pass through, the glass is prevented from being excessively broken at the hammering position, and therefore abrasion of equipment is reduced, unnecessary repeated breaking is avoided, the breaking efficiency is improved, and the service life of the equipment is prolonged. The granularity uniformity of the cullet is ensured, excessive crushing is avoided, the recycling standard is met, and the recycling rate of the glass is increased.

The utility model discloses a mineral mining crushing device for mine, which comprises a box body, a feed port, a first crushing device, a screening device, a discharge port, a second crushing device and a discharge port, the first crushing device comprises a first driving assembly and two first crushing rollers, and the first driving assembly is arranged above one side of the box body; the two first crushing rollers are rotatably arranged in the box body, and the two first crushing rollers are connected with the first driving assembly; the screening device comprises a screening plate and two shaking assemblies. Therefore, two layers of crushing devices are arranged, the second layer of crushing device can perform fine secondary crushing on ores crushed by the first layer of crushing device, and it is ensured that the ores achieve the expected crushing effect. And meanwhile, through the screening device, the ore obtained after primary crushing can be precisely filtered, the ore meeting the requirement is separated from the ore not meeting the requirement, and therefore unnecessary repeated crushing is avoided, and the crushing efficiency is greatly improved.