7results about How to "Reduce scour damage" patented technology

The present invention discloses a multifunctional ecological water supply tunnel structure and operation method for a super high rockfill dam, and belongs to the field of water conservancy and hydropower engineering. The multifunctional ecological water supply tunnel structure for a super high rockfill dam described in the present invention can form different structures in different operation stages, thereby realizing different functional roles, and the structural arrangement is simple to realize, and the construction is convenient, and it realizes the functions of ecological water supply, water storage and discharge control, diversion during the maintenance period, and diversion and flood control during the flood season, thereby achieving the purpose of one tunnel for multiple uses, and meeting the multiple needs of the super high core wall rockfill dam project, so that when having the corresponding functions, other corresponding functional tunnels required for the super high core wall rockfill dam project can be reduced, the engineering volume can be reduced, and the engineering investment can be saved.

The application relates to a river bend anti-scouring damage device, and belongs to the technical field of river anti-scouring. The river bend anti-scouring damage device comprises a concave bank slope, a tooth wall is arranged on the concave bank slope, the tooth wall comprises a plurality of anti-scouring wall bodies arranged on the concave bank slope, the plurality of anti-scouring wall bodies are sequentially and spacedly arranged along the vertical direction, and the distance from one side of the anti-scouring wall body close to the convex bank slope to the other side of the anti-scouring wall body close to the concave bank slope increases sequentially from top to bottom. The application has the advantages of improving the anti-scouring effect of the concave bank to a certain extent.

A slope section differential energy dissipation structure belongs to the technical field of hydraulic engineering structures and is characterized in that a bottom plate and at least one group of stilling piers are sequentially arranged on a slope section at the upstream of a stilling pool of a release structure from bottom to top. The stilling piers are arranged in a plum blossom shape, and the whole stilling piers are in a barb body shape perpendicular to the water flow direction. The baffle piers enable water flow to turn and collide with each other behind the piers, so that turbulent fluctuation of the water flow is increased, the water flow is divided into a plurality of small water strands, flow velocity distribution is adjusted, the water flow is discharged group by group, friction with the water flow is increased, roughness of a slope section is increased, energy is dissipated along a flow space, energy dissipation efficiency is improved, and downstream scouring of hydraulic structures such as gate dams and the like can be improved. The scouring damage of discharged water flow to the stilling pool, the apron and the riverbed is relieved, the efficient energy dissipation effect is achieved, and the requirements of engineering safety and the like are met.

The present invention provides a structure for preventing scour and water droplets in debris flow in loess areas, comprising: a drainage structure, wherein the drainage structure comprises a first horizontal section, an inclined section, and a second horizontal section arranged in sequence, wherein the first horizontal section is higher than the second horizontal section, an anti-scour strip is arranged in the inclined section, and a force dissipation tooth is arranged in the second horizontal section. The present invention sets an anti-scour and water droplet in the drainage project, which, on the one hand, facilitates flood discharge in the channel, and on the other hand, can reduce the scour damage of debris flow through the energy dissipation effect of the anti-scour and water droplet. At the same time, various types of force dissipation teeth are dispersedly arranged, which neither affects the flow capacity of the drainage structure nor ensures the smooth drainage of floods or debris flow.

The present application relates to the technical fields of industrial fluid control and valve automation, in particular to a stop valve multi-target collaborative control optimization system based on industrial data processing, comprising a multi-dimensional data acquisition step: a multi-dimensional data acquisition center calls real-time operation parameters of the stop valve; a flow resistance characteristic coupling analysis step: a fluid state observation unit calculates the current flow coefficient and the transient pressure difference value based on the parameters; a risk discrimination and decision step: a working condition risk assessment unit quantifies the water hammer and cavitation indexes, obtains a comprehensive risk evaluation value by weighting, and outputs a smooth control or ultra-fast response signal accordingly; a trajectory planning step: a trajectory planning unit respectively generates a nonlinear damping velocity curve or a linear step velocity curve according to the signal type; a flexible execution step: a flexible execution unit drives the stop valve to act, and monitors the closing contact state to realize the switching of the velocity and torque control modes; the present application solves the problem that the traditional control ignores the fluid dynamics risk, and prolongs the service life of the equipment.

The device comprises a transverse groove formed in the top of a dam body, a cover plate is arranged at the top of the transverse groove, a flexible energy dissipation pad is fixed to the inner wall of the transverse groove, the flexible energy dissipation pad comprises a flexible outer sleeve and a porous elastic inner core, a vacuum check valve is arranged at the edge of the flexible outer sleeve, and the porous elastic inner core is fixed to the edge of the flexible outer sleeve. The flexible energy dissipation pad has a rolling state in which the flexible energy dissipation pad is located in the transverse groove after being vacuumized and a normal-pressure energy dissipation flow guide state in which the flexible energy dissipation pad extends towards the outer side of the transverse groove to be unrolled and spread on the downstream dam face. The emergency method disclosed by the invention comprises the following steps: when encountering extremely heavy rainfall weather, opening the cover plate, pushing the flexible energy dissipation pad out of the transverse groove, enabling the flexible energy dissipation pad to be converted into a normal-pressure energy dissipation flow guide state from a rolling state, and after the reservoir water level rises to the dam top, performing energy dissipation and drainage on flood to the stilling pool along the flexible energy dissipation pad. Energy dissipation and emission increasing are combined, the influence on downstream dam body scouring is relieved, and the operation requirement that dam bodies of small and medium-sized reservoirs overflow but not collapse or overflow but collapse slowly is met.

The invention relates to a modular output structure for an automobile fuel tank, which is applied to the field of automobile fuel tanks and comprises an output structure, the output structure comprises an output end and an input end, an inner sealing structure is arranged in one end of the input end, and the inner sealing structure comprises an annular plate and a butt joint cylinder coaxially fixed with the annular plate; a ring groove coaxial with the ring plate is formed in the ring face of the ring plate, and a second sealing ring is embedded in the ring groove. The sleeve is arranged on the butt joint cylinder in a sleeving mode through the extrusion structure, the sleeve extrudes the second sealing ring, the second sealing ring is made of rubber and is tightly attached to the sleeve, so that sealing is completed, a flexible sealing mode is adopted, high-accuracy accessories are not needed, friction damage can be reduced through an extrusion sealing mode, and the service life of the butt joint cylinder is prolonged. The fuel oil flows out through the butt joint cylinder, only a small part of the fuel oil washes the second sealing ring, the washout damage of the second sealing ring is reduced, and therefore the service life of the whole output structure is prolonged.