275 results about "Water velocity" patented technology

The invention discloses a coiled reverse osmosis membrane element, which is formed by winding at least one group of water purification membranes on a central water yielding pipe, wherein the water purification membrane group consists of a purified water guide net, a reverse osmosis membrane and a water inlet guide net which are overlapped; a water inlet flow channel is formed by folding the inner surface of the reverse osmosis membrane, and a water yielding flow channel is formed between the adjacent outer surfaces; the water inlet guide net is positioned in the water inlet flow channel; the purified water guide net is positioned in the water yielding flow channel; the water yielding flow channel only has a purified water outlet facing the central water yielding pipe, and other three sides of the water yielding flow channel are closed and sealed; the partial zones, far away from the central water yielding pipe, on the two sides, adjacent to a folded side, of the water inlet flow channel which are closed and sealed; so a small section raw water inlet is formed on the two sides close to the central water yielding pipe respectively and a thick water outlet is formed on the side of the water inlet flow channel opposite to the folded side. Through improvement, the reverse osmosis membrane element of the invention increases the water velocity on the surface of the membrane, reduces the concentration polarization on the surface of the membrane, and reduces the pollution speed of the coiled membrane element so as to prolong the service life of the membrane element.

The invention discloses an underwater drag-reduction surface simulating scarfskin morphology of a puffer and a preparation method. The underwater drag-reduction surface simulating the scarfskin morphology of the puffer comprises a basement, hard drag reduction elements, and soft cover layers, wherein a plurality of hard drag reduction elements are distributed on the basement, the soft cover layers are filled among the hard drag reduction elements, and the hard drag reduction elements are tightly attached to the joint surface of the basement and the hard drag reduction elements. By adoption of the tapered or columnar hard drag reduction elements, the underwater drag-reduction surface simulating the scarfskin morphology of the puffer is different from the existing rib-shaped groove structure; and the soft layers are covered on the basement and form the rigid-flexible drag reduction surface which can form adaptive variations with differences of water velocity on the surface and fit with the scarfskin properties of the puffer better.

The present invention provides a method for analyzing traces collected along a plurality of adjacent sail lines in a marine seismic survey area. The method comprises selecting a plurality of trace groups, at least one trace in each group sharing a common midpoint with at least one trace from another group, determining an initial zero-offset travel time for each trace in the trace groups, and generating a plurality of updated zero-offset travel times and a plurality of time corrections for the trace groups using a pre-selected function of the initial zero-offset travel times.

The invention discloses a pollution source tracking method and system used for an unmanned ship. The method includes the steps of: obtaining a water flow direction and water velocity by testing, and then automatically obtaining a water body monitoring point of the unmanned ship; according to the water body monitoring point, automatically generating a sailing route or self-defining a sailing route to obtain a predetermined sailing route; and performing water body monitoring when the unmanned ship sails, thereby determining a pollution source range. The system includes a monitoring point acquisition unit, a ship route formulation unit and a pollution source tracking unit. The pollution source tracking method and system formulate the sailing route, and perform water body monitoring when the unmanned ship sails, thereby determining the pollution source range, so that the diffusion degree and range of the pollution source can be tracked through the unmanned ship, and researchers can know the situation of the pollution source in time and take effective measures to the pollution source in time. The pollution source tracking method and system can be widely applied to unmanned ship products.

The invention relates to a multifunctional vacuum-positive pressure smelting and solidification device, in particular to a device for preparing various special materials by smelting and solidification processes under hermetic vacuum and high pressure. The device consists of a smelting furnace and a unidirectional solidification furnace which are placed at a mutual angle between 90 and 100 DEG, and communicated through a sprue cup; the open end of the sprue cup is lower than a crucible in the smelting furnace and encloses the lower edge of the crucible, while the other end is lower than the upper edge of a unidirectional solidification die in the unidirectional solidification furnace; and fused mass casting speed is controlled by the tilting speed of the device, and the unidirectional solidification speed of fused mass can be controlled by the water velocity in a water cooled crystallizer and medium between the water cooled crystallizer and a casting die. The device can be used for producing porous foam materials, high nitrogen austenite stainless steel and metal/ceramic composite materials in the fields such as aviation, electronic, medicine and biochemistry, metallurgical machinery, petrochemical industry, energy and environmental protection, national defense and war industry and the like.

Method for processing seismic data to correct for errors caused by variation in water conditions. In one implementation, the method may include (a) applying a dip correction to a plurality of observed water bottom reflection times using a model water velocity and an estimate of geologic dip; (b) applying a normal moveout (NMO) correction to the dip corrected observed water bottom reflection times using the model water velocity; (c) applying a common mid point (“CMP”) bin centering correction to the NMO corrected, dip corrected observed water bottom reflection times using the model water velocity and the estimate of geologic dip; (d) solving for Δs_i, which is an estimate of the difference in slowness between the observed water bottom reflection times and the water bottom reflection times that would have been observed had the water velocity been the same as the model water velocity; (e) solving for an estimate of observed water velocity based on s_obs,i=s_m+Δs_i, where s_obs,i is an estimate of observed slowness and s_m is defined as the model slowness; (f) layer replacing the observed water bottom reflection times using the estimate of the observed water velocity and the model water velocity; and (g) repeating steps (a) to (f) using the layer replaced observed water bottom reflection times until the changes in the estimate of observed water velocity approach zero.

The present invention provides a method for reducing water bottom reflection time differences. The method includes selecting a plurality of trace groups, each trace having an offset from a midpoint and a water bottom reflection time. The method also includes determining a rate of change of the water bottom reflection time of each trace and generating a model water velocity and a model water bottom reflection time for each trace midpoint using a preselected function of the water bottom reflection times and the rates of change. Furthermore, the method includes generating a plurality of water bottom reflection time corrections for the traces in each trace group using a pre-selected function of the water bottom reflection times, the model water bottom reflection times, the model water velocities, and the trace offsets.

The Vortex Hydro Turbine takes water through two upper inlets and one lower inlet from the current in which it is submerged. The upper inlets direct the water flow into cylindrical chambers with a spiral bottom to create a vortex. The top of the chambers are specifically left open to allow the water to exit and to reintegrate into the existing native flow. This movement of the water creates a low pressure area within the center of each of the chambers which is transferred to the back side of a turbine blade system through depending tubes. Water flows thru the turbine blade via the lower inlet and out the tail pipe. The low pressure from the depending tubes, aft of the blades, increases the water velocity through the blades for increased power output. The system can be scaled as a standalone unit or as an array.

The invention relates to a method for acquiring radial direction water velocity in an acoustic Doppler current profiler. The acoustic Doppler current profiler adopts an acoustic wave transducer as a sensor, an emitted acoustic impulse generates a scatter echo through an irregular scatterer in a water body, the acoustic wave transducer receives the scatter echo, and the radial direction water velocity is acquired through analysis. The method is characterized by comprising the following steps: firstly, setting a search scope and a count of radial direction water velocity according to the direction and degree of urgency of water flow in measurement environment; and secondly, designing a matching signal corresponding to radial direction velocity of each search point, carrying out matched filtering operation on the matching signal corresponding to each radial direction velocity and an echo signal received by the acoustic wave transducer, and searching a matched filtering result, wherein the radial direction velocity corresponding to a maximum value of the matched filtering result is the radial direction velocity to be measured.

Various technologies for a method for processing seismic data. In one implementation, the method includes cross-correlating seismic traces having midpoint locations, offsets and azimuths within a predetermined range but from different sequences; and selecting a peak on each cross-correlation. Each peak corresponds to a difference in travel times between two seismic traces that were cross-correlated. The method further includes converting the difference in travel times between the two seismic traces to a difference in water velocities between a pair of sequences associated with the two seismic traces at a spatial location.

The invention discloses a heat treatment device for the gradient of a disk component. With adoption of the heat treatment device, the technical problems that the treatment temperature of the heat treatment device of the disk component is low and the temperature gradient is small can be solved; the technical scheme is as follows: an upper furnace body and a lower furnace body are respectively provided with a cooling box; a cooling pipe is rotated in the cooling box; the periphery of the cooling pipe in the cooling is filled with heat conducting salt; the cooling pipe is provided with a circulating pump; the inner wall of the lower furnace body is provided with a resistance band; the high-performance resistance band is utilized to realize high heating efficiency; the cooling water velocity is controlled through the heat conducting salt filled in the cooling box and utilizing the circulating pump, so that the treatment temperature of the gradient heat treatment device is improved and thedisk component is enabled to obtain larger temperature gradient; the heating temperature of the disk edge is improved to 1100 DEG C from 900 DEG C in a background technology; the temperature gradientof 300-500 DEG C is realized at the parts of the disk edge and a disk center to obtain the structural gradient of thick and fine isometric crystals; and double-structure turbine disk is manufactured.

The invention discloses a device used for monitoring the surface flow rate and flow of a river or a strait by utilizing a very high frequency/ultra high frequency (VHF/UHF) radar, and particularly relates to a river flow monitoring device based on the VHF/UHF portable radar. The river flow monitoring device is erected on a shore side which keeps a certain distance from a river bank, the estimation of water velocity of the river or the strait can be accurately achieved by utilizing the Bragg principle, the river flow monitoring device can measure the radial velocity of thousands of points in the different distances and different wave beam ranges between the upper stream and the lower stream of the river, and a discharge flow vector diagram is calculated through a host computer. The river flow monitoring device based on the VHF/UHF portable radar can work all weather, is characterized by being small in cost, small in size, light in weight, low in power consumption, and the like, and can meet the requirements of vehicle mounting and installation of a portable base station. The river flow monitoring device based on the VHF/UHF portable radar resolves the problems that traditional flow measuring technology is large in text difficulty and is low in measuring accuracy, and test conditions are heavily affected by the geographical environment and weather, and has the advantages of being high in measuring accuracy, simple in structure, high in reliability, light in weight, portable, easy to install, and the like.

The cascade water blocking and water storage system used for municipal rainwater pipe network includes water blocking system and water storage system. The water storage system includes a reservoir, which is composed of a water blocking device and a rainwater culvert or a pipe network. The water blocking facility is equipped with an opening and closing mechanism for opening or closing the gate, and is equipped with a water level sensor, a flow rate sensor and a gate. The position sensor is used to measure and obtain signals such as water level, water level rising speed, water flow speed and valve position. On the basis of retaining the functions of the original municipal culverts and pipe network to discharge rainwater, this system has newly set up water blocking, water regulation and storage facilities, and is equipped with an intelligent control system to realize cascade automatic regulation and storage of rainwater in municipal facilities without the need for new storage. Larger cost investments such as pools and rainwater tanks have also unearthed new functions of municipal rainwater facilities, giving full play to the implementation value of existing urban infrastructure, and accelerating the construction and realization of sponge cities.

The invention discloses a separation method for roughing slime through a teetered bed separator (TBS) and concentrating coarse slime difficult to separate through a slime dense medium cyclone. Slime of a slime water system is pumped to a hydraulic classification cyclone to be classified, and overflows into flotation equipment to be separated; and underflow enters the TBS, high-ash tailings and coarse clean coal with a high ash content are obtained at a high ascending water velocity under a high bed density, the coarse clean coal enters the slime dense medium cyclone to be concentrated, and finally clean coal and middling products are obtained. According to the method, the advantages of the TBS and the advantages of the slime dense medium cyclone are combined, the advantages are enhanced, and disadvantages are avoided; the coarse slime difficult to separate is roughed through the TBS to obtain the high-ash tailings and the coarse clean coal; by making use of the characteristic that the separation precision of the slime dense medium cyclone is high, the coarse clean coal is concentrated, and the high-quality clean coal meeting the requirements of a low ash content and a high recovery rate is obtained. Not only are the common problems of 'coarse coal running', 'ash carrying' and the like in coal preparation plants solved, but also the technological problems of high-precision separation of the high-ash coarse slime difficult to separate are solved.

The embodiment is a venturi front shroud that can be pursed or released to decrease or increase water velocity through the housing of a turbine.

The invention discloses a device for testing the anti-scouring capability of a soil body. The device comprises a bearing frame, wherein the bearing frame is provided with an upper water tank and a lower water tank; an inner space of the upper water tank is divided by a vertical water inflow sieve tray and a water drainage sieve tray into a water flow inflow section, a water flow stabilizing section and a water flow draining section; a sample holder is installed at the upper part of the bearing frame; a force transferring platform with an electronic scale in the sample holder is connected witha sample box through a plurality of force transferring rods; the sample box extends into the water flow stabilizing section; the end face, vertical to the water flow, of the sample box is a metal meshsurface; and a velocimeter is arranged in the water flow stabilizing section. The device and method, provided by the invention, for testing the anti-scouring capability of the soil body solves the problem that no experimental facility is provided for testing the anti-scouring capability of the soil body, the device is simple in structure and convenient to use, the data of the electronic scale areautomatically acquired, the scouring force is calculated according to the water velocity, the time relation between the scouring force and the particle loss amount is established, and the anti-scouring capability of different soil samples is tested.

Methods and apparatus for improved power generation through movement of water retrofitting existing hydroelectric dams with draft tube inserts and tailrace walls to increase water velocity for production of power using hydrokinetic turbines installed in the tailrace. By initial design or by draft tube inserts and tailrace walls, increased and streamlined water flow leads to higher efficiencies of the hydrokinetic turbine, thus more efficiently converting available kinetic energy of the water into usable energy.

The invention pertains to the field of welding devices, in particular to an experimental device used for in-service welding repair of pipelines, which is characterized in that the device is composed of a water tank (1), a thermometer (2), a circular circuit (3), a high-pressure pump (4), a valve (5), a pipeline (6), a bottom plate (7), a repair plate (8) and a flowmeter (9). The lower end of the water tank (1) is connected with the high-pressure pump (4) via the circular circuit (3) of a galvanized pipe; the thermometer (2) is arranged on the inner wall of the water tank; the high-pressure pump, the valve (5), the experimental pipeline (6) and the flowmeter (9) are connected via the circular circuit; the terminal pipeline of the circular circuit is inserted to the water tank; the bottom plate (7) and the repair plate (8) are materials to be welded for the research of in-service welding, and are arranged on a groove of the pipeline. The invention has the advantages of that: in-service welding simulation experiments can be operated on the pipelines with different wall thicknesses under the conditions of different water velocities and water temperatures; the process is safe, the structure is simple, and the operation is simple; the device can be applied in the simulation assessment and research of comprehensive performance of the in-service welding joints of the pipelines.