4results about How to "Even settlement" patented technology

The present application belongs to the technical field of circulating solar power generation, and particularly relates to a supercritical carbon dioxide heat conversion device with pseudo-boiling state heat-carrying particles. The device comprises a shell inlet and a shell outlet arranged at the upper and lower ends of a shell body for the heat-carrying particles to enter and exit the shell body, and a heat exchange core formed by a heat exchange pipe and a circulating gas pipe wound on a central air duct. The heat exchange pipe is connected to a supercritical carbon dioxide circulating device outside the shell body, and the circulating gas pipe is connected to an air inlet device outside the shell body. The pipe wall of the circulating gas pipe is provided with air outlet holes for uniformly supplying air to the heat exchange core. The central air duct is provided with air inlet holes for receiving and discharging the circulating air blown from the air outlet holes to the heat exchange space. When the heat-carrying particles enter the gap of the heat exchange core, the heat-carrying particles are simultaneously subjected to the action of gravity and buoyancy, and form pseudo-boiling motion under the action of air flow, thereby significantly improving the heat exchange efficiency with the heat exchange pipe. Meanwhile, the falling speed of the heat-carrying particles is slowed down, and the heat exchange time is prolonged.

The invention relates to a targeted recovery method for residual ores in a covering layer of a caving method stope, which comprises the following steps: step 1, a residual ore area identification stage: combining an original ore body model, mining design data and ore removal grade records, and constructing a residual ore target area model through historical ore removal statistical data of each stage, the method comprises the following steps: (1) deducing a possible residual ore enrichment area, (2) a recovery engineering arrangement stage, (3) a target area flow regulation stage and (4) a dynamic ore drawing management stage. According to the technical scheme, accurate recognition and targeted recovery of the covering layer residual mine area are achieved through combination of ore drawing management and the bulk flow model, the loss rate is remarkably reduced, the quantity of extracted resources is increased, and economic benefits are improved.

This invention provides a bridge pier foundation pit filling structure and construction method using L-shaped foamed concrete blocks, belonging to the field of road and bridge engineering construction technology. It includes: a foundation pit, at least one pile foundation, a pile cap, a bridge pier, and a filling structure; at least one pile foundation is located within the foundation pit; the bottom surface of the pile cap is connected to the top surface of the pile foundation; the bridge pier is connected to the top surface of the pile cap; this device fills the foundation pit by using an interlocking, layered, and overlapping method to fill the pit with L-shaped foamed concrete blocks, combined with a method of filling joints with cast-in-place foamed concrete. This strengthens the strength and integrity of the foundation pit filling material between the pile cap group and the bridge pier group, and utilizes the properties of foamed concrete to reduce the pressure of the backfill soil in the foundation pit, thus reducing the problems of bridge pier settlement and uneven settlement between bridge pier groups.

The utility model discloses an asphalt mixture density measuring device, a feeding mechanism comprises a bottom plate, the two sides of the top of the bottom plate are fixedly connected with supporting rods, the tops of the two supporting rods are fixedly connected with a supporting frame together, the upper end of the inner side of the supporting frame is rotatably connected with a rotating disc, and the rotating disc is fixedly connected with the bottom plate. Lifting rods are symmetrically and slidably connected to the top face of the rotary disc, the tops of the two lifting rods are jointly and fixedly connected with a supporting ring, supporting springs are further fixedly connected to the two sides of the bottom face of the supporting ring, the bottoms of the two supporting springs are fixedly connected with the top of the rotary disc, and the middle of the top face of the supporting ring is further fixedly connected with a weight sensor. The container main body is supported above the supporting ring with the weight sensor, so that the asphalt mixture can be conveniently weighed, the asphalt mixture can be put into the container main body step by step in batches, and the supporting ring and the container main body are vibrated up and down between the intermittent putting steps, so that the asphalt mixture is assisted to uniformly settle.