4results about How to "Reduce water damage" patented technology

The invention discloses a heat-insulating waterproof asphalt mixture and a preparation method thereof, and relates to the technical field of building materials. The SBS modified asphalt is used as a matrix material, the isotropic mesophase asphalt is partially increased through heat treatment, accordingly, foam holes which are well-developed in structure and evenly distributed are formed in a matrix in a supercritical carbon dioxide foaming process, the heat insulation and waterproof effects are achieved, and by adding the magnesium element, the basalt short fiber and the titanium boride particles, the thermal insulation and waterproof effects are achieved. Mechanical support is formed on an interface, the stability of the structure is enhanced, the waterproof performance and the heat insulation performance of the substrate are further enhanced, a pore structure of the substrate is filled with silicon dioxide aerogel, so that the waterproof performance and the heat insulation performance of the substrate are enhanced, then the surface of the substrate is coated with a sealing agent, and the sealing agent is cured to form a film; therefore, the possibility that the asphalt mixture is damaged by water is greatly reduced.

This utility model discloses an interlocking block slope protection for a plain reservoir dam, comprising several evenly arranged slope protection blocks. Each slope protection block has multiple elongated openings along its transverse direction on its front side, extending longitudinally through the block. Multiple longitudinal drainage pipes are installed within each slope protection block, with both ends of each pipe connected to the outside. Furthermore, the drainage pipes are arranged in a matrix along the longitudinal direction. Even further, a connecting pipe is provided between two adjacent drainage pipes in the transverse direction. Furthermore, a rubber pad layer is provided on the outer surface of each slope protection block. Even further, the surface of the rubber pad layer has several raised points. This utility model, by installing multiple drainage pipes inside the slope protection block and providing a rubber anti-slip layer on the outer side, enables the slope protection block to drain rainwater quickly and efficiently without losing stability under temperature changes.

The invention relates to the technical field of gas reservoir dynamic analysis, in particular to a gas reservoir water invasion degree prediction method based on early production dynamics, which comprises the following steps of: dividing a gas reservoir water invasion degree grading graph, and calculating and determining gas reservoir dynamic geological reserves through a Blasingame method and linear regression according to gas reservoir production dynamics data; then, the dimensionless apparent pressure PFD and the recovery degree Rg of the closed gas reservoir are calculated, a PFD-Rg relation scatter diagram of the gas reservoir is drawn, and analysis data points in the PFD-Rg relation scatter diagram of the gas reservoir are evaluated and removed based on the basic characteristic that the energy of the stratum water body of the elastic water-drive gas reservoir is limited; based on the reserved effective analysis data points, determining a gas reservoir PFD-Rg relation curve by adopting a linear regression analysis method; and finally, comparing with a gas reservoir water invasion degree grading graph to determine the gas reservoir water invasion degree. Through the prediction method, the gas reservoir water invasion degree can be determined when the production data does not reflect the water invasion influence stage, the gas reservoir water invasion damage is weakened, and the gas reservoir recovery efficiency is improved.

This application discloses a control method for a surface cleaning device. The surface cleaning device includes a floor brush with cleaning components and a suction system for removing dirt. The floor brush includes a housing, on which are a movable front scraper located in front of the cleaning components and a floor scraper located behind the cleaning components and in contact with the ground. When the floor brush moves forward, the front scraper moves upward away from the ground; when the floor brush moves backward, the front scraper moves downward and in contact with the ground. The method includes reducing the operating power of the suction system when the floor brush moves backward. In this application, when the floor brush moves backward, the front scraper contacts the ground, and together with the floor scraper in contact with the ground, the brush chamber and the ground form a relatively sealed space. Under the action of the front scraper, the floor scraper, and the suction airflow of the suction system, the resistance of the floor brush to the ground increases. At this time, reducing the operating power of the suction system can ensure the dirt removal effect of the surface cleaning device and reduce the operating resistance of the floor brush to the ground, thus ensuring the cleaning effect.