The invention discloses a method for simulating the water flow properties of a natural river way through utilizing an annular water channel. The method comprises the step of enabling water to flow in the annular water channel, wherein the annular water channel comprises at least one section of straight channel. The invention further discloses a device for simulating the water flow properties of a natural river way through utilizing an annular water channel. The device comprises a base, an annular water channel main body and a rotating power device, wherein the annular water channel main body is mounted on the base, an annular water channel is arranged on the annular water channel main body, water in the annular water channel is enabled by the rotating power device to form annular water flow, and the annular water channel comprises at least one section of straight channel. The method and the device can be used for not only studying water flow and mud dynamic properties, but also testing mechanisms related to water quality, water environments and the like. The device has the technical advantages that the water channel is fixed, and water flow is driven to move by the shear force of paddle movement; the device structure and a control system are simple, the cost is low, and the test operability is strong.

Method and device for simulating water flow properties of natural river way through utilizing annular water channel

The invention discloses a test method for evaluating grit chamber degritting effect in a sewage pretreatment phase, which comprises the following steps: firstly taking raw water samples continuously at a turbulent flow zone of a grit chamber inlet channel, and performing sedimentation; uniformly adding a certain amount of mixed grit with a particle size grade matching the grit particle size grade in the raw water into a water inlet of the grit chamber, continuously taking samples at an outflow turbulent flow zone of the grit chamber, performing sedimentation of the water samples in a sedimentation device; rinsing, drying, and weighing the mud grit mixture collected in the sedimentation device to obtain the grit content of the inflow and outflow water of the grit chamber, calculating the grit chamber degritting rate by the ratio of the difference between the total grit amounts of the inflow and outflow water of the grit chamber at the sampling time to the total grit amount of the inflow water so as to evaluate the degritting effect of the grit chamber. The invention is simple and rapid in engineering application, stable and accurate in test data, and suitable for performance testing of degritting effect of different types of grit chambers.

Test method for evaluating grit chamber degritting effect in sewage pretreatment phase

The invention provides a test device of a truss type automatic measurement and control annular water tank. The indoor ground is provided with a horizontal machine seat, the horizontal machine seat is provided with a driving mechanism, the driving mechanism is provided with a rotatable annular water tank, multiple shear rings are uniformly distributed in the annular water tank, the shear rings are connected with a suspension rotation system, and the suspension rotation system is connected with a portal frame. Not only can the test device be used for researching power characteristics of water and silt, but also can be applied to tests related to water quality, water environment, ecology, fishery, ships and heat transfer, and the test device further has advantages of good measurement accuracy and good experiment stability.

Test device of truss type automatic measurement and control annular water tank

The invention discloses a silt washing starting measuring system capable of being synchronously applied to a laboratory and a tidal flat site. The silt washing starting measuring system comprises a control end and a measuring end which are connected. The measuring end comprises a reactor which is of a cylindrical structure, a profile current meter, a turbidity sensor and a transmission device, wherein the profile current meter, the turbidity sensor and the transmission device are located in the reactor. The profile current meter and the turbidity sensor are connected with the control end respectively, the transmission device comprises a motor, a connecting column and a rotating paddle, and the motor is in transmission connected with the rotating paddle through the connecting column; a cover plate is arranged at the top of the reactor, and the motor is fixed on the cover plate; an isolation groove is formed in the center of the bottom of the reactor, a groove cover connected with the isolation groove in a matched mode is arranged at the top of the isolation groove, a water inlet valve and a water outlet valve are arranged on the side wall of the reactor respectively, and the bottom of the reactor is connected with a bottom plate or annular lengthened supporting plates. The silt washing starting measuring system can be synchronously applied to silt washing starting measuring testing of the laboratory and the tidal flat site.

Silt washing starting measuring system capable of being synchronously applied to laboratory and tidal flat site

The invention relates to a debugging method for eliminating transverse circulation flows of an annular water channel. The debugging method is realized through a debugging system. The debugging system consists of a shear ring support frame, an annular water channel body, a shear ring, a control cabinet, a flow meter probe, an ADV probe and a transmission system. The transverse circulation flows in the annular water channel are eliminated by utilizing an acoustic doppler velocimeter, an open channel flow meter and a spherical color silica gel particle tracker. The hydraulic state of a water flow in the annular water channel is indicated by utilizing the spherical color silica gel particle tracker, the relationship between the running period of the annular water channel on a lower disc and the running period corresponding to a shear ring on an upper disc during the transverse circulation process is eliminated, and the operating parameters for eliminating the transverse circulation flows in the annular water channel are obtained; moreover, real-time measurement of water velocity under bi-directional motion conditions of the annular water channel is realized by utilizing an ADV and a flow meter, and the water flow velocity required for research is obtained by adjusting the shear ring and the rotating speed of the annular water channel body.

Debugging method for eliminating transverse circulation flows of annular water channel

The invention discloses a large-size temperature-controllable automatic stirring sedimentation compaction test device, which comprises a sedimentation cylinder. The large-size temperature-controllable automatic stirring sedimentation compaction test device is characterized in that a water inlet pipe and a water outlet pipe are arranged at the bottom part of the sedimentation cylinder; the bottom part of the sedimentation cylinder is further provided with an air inlet valve used for air inlet stirring in the cylinder; the bottom part in the sedimentation cylinder is provided with an air inlet pressing plate used for stirring a water body; and heating equipment is also arranged in the sedimentation cylinder. Compared with the traditional sedimentation cylinder, the sedimentation cylinder developed by the invention can be used for carrying out both sedimentation process tests and silt compaction process tests, can measure the continuous concentration value along a vertical line, and is convenient to operate. In addition, water temperature, salinity, water depth, initial sand content and other parameters can be adjusted conveniently.

Large-size temperature-controllable automatic stirring sedimentation compaction test device and test method thereof

The utility model provides an annular water channel for automatic-automatic measurement and control test. An indoor horizon is provided with a horizontal stand, the horizontal stand is provided with a drive mechanism, the drive mechanism is provided with a rotatable annular water channel body, a plurality of shear rings are uniformly distributed in the annular water channel, the shear rings are connected to a suspender rotating system, and the suspender rotating system is connected with a portal frame; the outer radius of the annular water channel body is 1.095m, the inner radius is 0.920m, the width of the water channel body is 0.160m, the wall thickness is 0.015m, the maximum height of the water channel body is 0.5m, and the rotating radius R of the water channel body is 1.000m. The annular water channel not only can be used for researching the dynamic properties of water flow and sediment, but also can be used for relevant test such as water quality, water environment, ecology, fishery industry, ships, heat conduction and the like; moreover, the measurement precision and experiment stability are good.

Annular water channel for full-automatic measurement and control test

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Large-size temperature-controllable automatic stirring sedimentation compaction test device and test method thereof

Annular water channel for full-automatic measurement and control test