CN201196560Y - Underwater repose angle measurer for small particle model sand - Google Patents

Abstract

The utility model relates to a fine particle model sand submarine angle of repose admeasuring apparatus for measuring mud and sand submarine angle of repose in water conservancy industry model. The admeasuring apparatus comprises a base board, a glass tank arranged on the base board, a support frame and fixation frame fixed on the base board. A graduated measuring rod is flexibly arranged on the fixation frame by a screw button, a sand holding cylinder for holding the test serous is fixed on the support frame, the lower part of the sand holding cylinder is communicated with a sample hose, the outlet of the sample hose is fixed at the bottom of a measuring rod, a test disc is arranged in the glass tank, and the vertical projection of an outlet circle center of the sample hose overlaps a circle center of the test disc. The admeasuring apparatus has the advantages of rapid and precise measurement, good measuring reproducibility, simple structure and convenient manufacturing.

Description

Underwater Angle of Repose Measuring Instrument for Fine Particle Model Sand

technical field

The utility model relates to an underwater angle of repose measuring instrument for fine-grain model sand used for measuring the underwater angle of repose of sediment in a water conservancy industry model.

Background technique

The underwater angle of repose of sediment is one of the important physical characteristic parameters of sediment, and it involves many subjects both in the basic research of sediment movement mechanics and in the practice of river engineering. The research on it is widely used in the research of the displacement quality, scour funnel in front of the dam, scour pit shape, bank slope stability and other issues. It also has certain practical value in the solid model test and mathematical model calculation. It is quite popular among domestic and foreign scholars. Pay attention to.

In the past, the measurement of the underwater angle of repose of sediment is generally: the observer uses a disc with a diameter of r, which is vertically fixed to the bottom end of the measuring rod of the water level measuring needle. When observing, first pour Shayang into the pool and stir well, then put the disc of the observer on the bottom of the pool. After the sand sample is deposited for a certain period of time, the disc is lifted very slowly through the measuring rod until the bottom of the disc is separated from the sand surface in the pool, but the top of the sand pile on the disc cannot be exposed to the water surface. Then observe the height of the sand pile from the measuring rod, and use the trigonometric function to convert the underwater angle of repose of the sand ocean. The above measurement method is relatively time-consuming because it needs a certain period of time for deposition, especially when it is lifted upwards, there will be disturbances, which will affect the measurement.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an underwater angle of repose measuring instrument for fine particle model sand, which is more accurate and intuitive, has good measurement reproducibility, and is suitable for measuring the underwater angle of repose of model sand.

The purpose of this utility model is achieved in this way: it includes a bottom plate, a glass water tank placed on the bottom plate, a support frame and a fixed frame fixed on the bottom plate, and it is characterized in that: a measuring rod with a scale is movably installed on the fixed frame through a knob , on the support frame is fixed a sand box containing the test slurry, a sample hose is connected under the sand box, the outlet of the sample hose is fixed at the bottom of the measuring rod, and a test circle is set in the glass water tank. The vertical projection of the outlet center of the sample hose overlaps with the center of the test disc.

The outlet of the sample hose is kept at a height of 1 cm from the surface of the sand pile accumulated on the test disc.

The beneficial effect of the utility model is that: the measuring rod with a scale is lifted by the knob, and the underwater angle of repose of the fine-grain model sand can be obtained more accurately by measuring the surface height of the model sand pile on the scale on the measuring rod, and the measurement is fast. The utility model has the advantages of high accuracy, good measurement reproducibility, simple structure, convenient manufacture and good practical value.

Description of drawings

Fig. 1 is a structural diagram of the utility model.

In the figure, 1 is the bottom plate, 2 is the glass water tank, 3 is the test disc, 4 is the sand container, 5 is the measuring rod with scale, 6 is the knob, 7 is the test slurry, 8 is the sample hose, 9 is Support frame, 10 are fixed mounts.

specific implementation

As shown in Figure 1, the utility model includes a bottom plate 1, a glass water tank 2 placed on the bottom plate 1, a support frame 9 and a fixed frame 10 fixed on the bottom plate 1, and is characterized in that: the fixed frame 10 is movable through the knob 6 A measuring rod 5 with a scale is installed, a sand container 4 containing the test slurry 7 is fixed on the support frame 9, a sample hose 8 is connected under the sand container 4, and the outlet of the sample hose 8 is fixed on The bottom end of the measuring rod 5 is provided with a test disc 3 in the glass water tank 2 , and the vertical projection of the center of the outlet of the sample hose 8 overlaps with the center of the test disc 3 . The measuring rod 5 of the scale can be lifted up and down by the knob 6 . The height between the outlet of the sample hose 8 and the surface of the sand pile accumulated on the test disc 3 is kept at about 1 cm.

The method of using the fine particle model sand underwater angle of repose measuring instrument shown in Figure 1 is as follows: when measuring the underwater angle of repose, first add clear water of a certain height into the glass water tank 2, and adjust the measuring rod 5 through the knob 6 to make the test The outlet of the sample hose 8 is aligned with the center of the test disc 3, and write down the scale reading on the measuring rod. Add an appropriate amount of sand sample into the feeding cylinder 7, the sand sample flows out through the outlet of the sample hose 8, and forms a conical sand pile on the test disc 3. As the height of the sand pile increases, slowly turn the knob 6, The height of the outlet of the sample hose 8 from the surface of the sand pile should always be kept at about 1 cm until the outer edge of the disc is completely covered, write down the scale reading of the measuring rod, and subtract the readings, that is, the height of the sand pile.

Claims (2)

1. fine grained model sasnd angle of repose measuring instrument under water, comprise base plate (1), be placed on the glass water tank (2) on the base plate (1), be fixed on bracing frame (9) and fixed mount (10) on the base plate (1), it is characterized in that: go up the measuring staff (5) that is movably installed with the band scale by knob (6) at fixed mount (10), on bracing frame (9), be fixed with the husky tube of Sheng (4) of splendid attire test slurries (7), below containing husky tube (4), connect sample flexible pipe (8) is arranged, the outlet of sample flexible pipe (8) is fixed on the bottom of measuring staff (5), be provided with test plate (3) in glass water tank (2), the center of circle of the vertical projection in the outlet center of circle of sample flexible pipe (8) and test plate (3) is overlapping.

2. fine grained model according to claim 1 is the angle of repose measuring instrument under water, it is characterized in that: the outlet of sample flexible pipe (8) remains on 1cm with the sand drift surface elevation that is deposited on the test plate (3).