CN110354733A - A kind of husky turbulent flow metering experimental situation matching device of water - Google Patents

Abstract

The invention discloses a kind of husky turbulent flow metering experimental situation matching devices of water, and described device includes: bracket, and the bracket is for fixing stirring pool；It is provided with sampling module above the stirring pool, for detecting stirring result；The top of the bracket is also placed with guide rail, motor and its driver, and the shaft of motor is fixedly connected with the crank section of crank rocker module；The main rod end of crank rocker module is connected with grid fixed plate；Grid sets are fixedly connected with grid fixed plate；Grid sets are deep into stirring pool, adjust the movement speed of grid sets in real time according to testing result, reduce the movement speed of grid sets when turbulent flow is too fast, and the movement speed of grid sets is accelerated in the bottom of stirring pool when having sediment siltation.The device volume is smaller, conveniently moving, and improves working efficiency, has saved human cost.

Description

A water-sand turbulence metering experiment environment proportioning device

technical field

The invention relates to the field of water transportation engineering, in particular to a water-sand turbulent flow metering experiment environment proportioning device.

Background technique

In the field of water transportation engineering, the status quo of inaccurate sedimentation measurement and lack of measurement standards still exists, which has a significant impact on port construction, channel maintenance and navigation safety. As an important parameter in the measurement of sedimentation, the sediment concentration of the upper water body is blank at home and abroad in the measurement standards of related sediment concentration measuring instruments, which limits the development, manufacture and application of high-precision sediment concentration measuring instruments.

The key technique for measuring the sediment content of the upper water body is the uniformity of sediment mixing. In the field of water transport engineering, the sediment in the water is relatively uniform, but it is difficult to simulate this uniform water quality in the measurement of water and sediment turbulence in the laboratory. There is uncertainty in artificial stirring, and it cannot be stirred evenly.

Therefore, need a kind of stirring device that just can obtain mud and sand to distribute evenly in the laboratory. The existing stirring devices are generally large in size, inconvenient to move, and the uniformity of stirring may not meet the requirements. Therefore, an automated facility that greatly improves work efficiency and saves labor costs is needed.

Contents of the invention

The present invention provides a water-sand turbulent flow metering experiment environment proportioning device. The device is small in size, easy to move, improves work efficiency, and saves labor costs. See the following description for details:

A water-sand turbulence metering experiment environment proportioning device, the device includes: a bracket, the bracket is used to fix a stirring tank; a sampling module is arranged above the stirring tank for detecting the stirring result;

A guide rail, a motor and its driver are also placed above the bracket, and the rotating shaft of the motor is fixedly connected to the crank part of the crank rocker module; the rocker end of the crank rocker module is connected to the grid fixing plate; the grid group is connected to the grid Fixed plate fixed connection;

The grid group goes deep into the stirring tank, and the moving speed of the grid group is adjusted in real time according to the detection results. When the turbulent flow is too fast, the moving speed of the grid group is reduced, and when there is sediment at the bottom of the mixing tank, the movement of the grid group is accelerated. speed.

Wherein, the length of the crank portion can be adjusted. The bottom of the stirring tank is perforated, and the material is a transparent acrylic plate.

Further, the grid fixing plate is composed of an upper fixing surface and a series of baffles perpendicular to the upper fixing surface.

Wherein, the material of the grid group is aluminum alloy, and the area ratio of the holes on the grid group is 60%.

During specific implementation, the slider is placed on a guide rail for one-dimensional free movement, and the guide rail is fixedly connected to the bracket.

Wherein, the grid group moves in the form of a sine function in the horizontal direction: L=A·sin(f·2πt)

In the formula, A is the relationship between the amplitude and the length of the crank, f is the relationship between the vibration frequency and the rotation frequency of the motor, t is the time, and L is the grid position.

The beneficial effects of the technical solution provided by the invention are: small size, easy to install, can quickly make water and sediment evenly mixed, build a stable and uniform water-sand turbulent flow field, and provide an experimental environment for water-sand turbulent flow measurement, Meet various needs in practical applications.

Description of drawings

Fig. 1 is a three-dimensional structure schematic diagram of a water-sand turbulence metering experiment environment proportioning device;

Fig. 2 is the standard three views of the water-sand turbulence metering experiment environment proportioning device;

Figure 3 is a grid structure diagram.

In the accompanying drawings, the list of parts represented by each label is as follows:

1: Bracket; 2: Sampling device;

3: Stirring tank; 4: Guide rail;

5: Motor; 6: Driver;

7: crank rocker device; 8: grid fixing plate;

9: grid group; 10: slider.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

Example 1

In order to achieve fast and simple goals, the embodiment of the present invention designs a device that provides an implementation environment for water and sand turbulent flow metering. The main body includes: a bracket 1 , a sampling device 2 and a stirring tank 3 .

Wherein, guide rail 4, motor 5 and its driver 6 are placed on the top of support 1, the rotating shaft of motor 5 is fixedly connected with the crank part of crank rocker device 7; The specific effect can be seen in Figure 2 in detail.

During concrete implementation, the grid group 9 goes deep into the stirring tank 3, and the moving speed of the grid group 9 can be adjusted in real time according to the detection results. When the turbulent flow is too fast, the moving speed of the grid group 9 is reduced. Accelerate the moving speed of the grid group 9 when the sediment is deposited; the bottom of the stirring tank 3 is opened; the sampling device 2 is placed above the stirring tank 3 when in use to detect the stirring result, and the motor 5 is connected to the crank rocker device 7 The length of the crank part can be adjusted.

During concrete realization, crank rocker device 7 is made up of two parts of crank and rocking bar, and when rocking bar moves to left and right poles, it is in a horizontal state.

Further, the guide rail 4 is used together with the slider 10, and the integrated model is preferably HGH30CA, and the slider 10 is placed on the guide rail 4 to perform one-dimensional free movement. Both sides of the guide rail 4 are fixed to the bracket 1 by screws.

Further, the model of the motor 5 is 57BYG113-360A, and the model of the driver 6 is DM542.

Further, the grid fixing plate 8 is composed of an upper fixing surface and a series of baffles perpendicular to the upper fixing surface, the upper fixing surface is fixed with the slider 10 by screws, and the baffle and the grid group 9 are fixedly connected by screws, and the grid Group 9 can be removed and replaced.

Further, the material of the grid group 9 is preferably aluminum alloy, and the thickness is adjusted according to one's actual needs. The holes are evenly arranged on the grid group 9. The shape of the holes is preferably circular, and the area ratio of the holes is 6%. About ten, the specific grid design of each piece is shown in Figure 3.

Further, the stirring tank 3 is made of a transparent acrylic plate with holes at the bottom.

Further, when the sampling device 2 is in use, samples should be taken at the center and four corners of the stirring tank 3 respectively.

In the entire water-sand turbulent flow metering and preparation device, the bracket 1 plays the role of fixing other devices. After the stirring starts, the stirring tank 3 will shake under the impact of the internal water flow, and even the pool wall may be broken. Therefore, it is very necessary to fix the stirring tank 3 with the bracket 1 . At the same time, the bracket 1 can also provide a fixed platform for the motor 5 and the guide rail 4, so that the relative position of the whole device is fixed.

The crank rocker device 7 cooperates with the guide rail slide table to convert the rotation of the motor 5 into translation in the horizontal direction. During the rotation of the crank driven by the motor 5, a component of the horizontal motion of the rocker is given, and the degree of freedom in the vertical direction is restricted by the guide rail slide table, and only the degree of freedom in the horizontal direction is reserved, so that the rotation of the motor 5 is converted into the horizontal direction of translation.

Among them, the grid group 9 is used as an element for stirring silt water, and its hole area ratio should be about 60%, so that it can ensure that the silt water mixture is evenly stirred without making the silt water The mixture forms a large vortex around the inner wall, which has a large impact on sampling and experimental results. Because the grid group 9 and the grid fixing plate 8 are fastened and connected by screws, when the proportion of silt in the mixture changes, the number of the grid group 9 can be adjusted, the stirring power can be changed, and silt deposits can be avoided. Stir the bottom of tank 3.

Example 2

The scheme in Embodiment 1 is further introduced below in conjunction with Fig. 1-Fig. 3, and specific calculation formulas, see the description below for details:

When in use, the motor 5 is first driven to rotate, and the rotation of the motor 5 will be converted into a horizontal motion by the crank connecting rod device 7 and the guide rail 4. The connecting rod end of the crank connecting rod device 7 is connected with the grid fixing plate 8, and the grid fixing plate 8 is fixed on the slider 10, and is driven by the crank connecting rod device 7 to perform simple harmonic motion in the horizontal direction. At this time, the grid group 9 immersed in the water will swing back and forth in the water to stir the water away.

The grid group 9 will move in the form of a sine function in the horizontal direction:

L＝A·sin(f·2πt) (1)

In the formula, A is the amplitude (cm) related to the crank length, f is the vibration frequency (Hz) related to the motor rotation frequency, t is the time (s), and L is the grid position (cm).

It can be seen from the formula that when the mechanical conditions are determined, the movement of the grid is only related to the vibration frequency, which is determined by the rotation frequency of the motor. Therefore, the movement of the grid set 9 can be changed by adjusting the rotation of the motor.

Since the grid group 9 and the grid fixing plate 8 are tightly connected by screws, it is not necessary to place all the grid groups 9 under normal circumstances. The number of grid groups 9 is used to improve the power of stirring, so as to avoid the silt depositing at the bottom of the mixing tank 3, causing uneven stirring. Power while avoiding the appearance of eddy currents.

After visually checking that the stirring is uniform, use the sampling device 2 to sample, dry and weigh the samples at the four corners and the center of the stirring tank 3, record and process the weighing results, and stir evenly, so that the corresponding water and sand turbulent flow measurement experiments can be carried out. operate.

After all the experimental operations of water-sand turbulence metering are completed, the piston (not shown) at the bottom can be opened to discharge the useless mud-sand-water mixture in the mixing tank 3 . For the mixture is discharged cleanly, grid group 9 can be started to stir the mixture.

In the embodiments of the present invention, unless otherwise specified, the models of the devices are not limited, as long as they can complete the above functions.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of a preferred embodiment, and the serial numbers of the above-mentioned embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (7)

1. a kind of husky turbulent flow metering experimental situation matching device of water, which is characterized in that described device includes: bracket, the bracket For fixing stirring pool；It is provided with sampling module above the stirring pool, for detecting stirring result；

The top of the bracket is also placed with guide rail, motor and its driver, the shaft of motor and the crank of crank rocker module Part is fixedly connected；The main rod end of crank rocker module is connected with grid fixed plate；Grid sets are fixedly connected with grid fixed plate；

Grid sets are deep into stirring pool, adjust the movement speed of grid sets in real time according to testing result, and turbulent flow reduces when too fast The movement speed of grid sets is accelerated in the movement speed of grid sets, the bottom of stirring pool when having sediment siltation.

2. the husky turbulent flow metering experimental situation matching device of a kind of water according to claim 1, which is characterized in that the crank Partial adjustable in length.

3. the husky turbulent flow metering experimental situation matching device of a kind of water according to claim 1, which is characterized in that the stirring The bottom opening in pond, material are transparent acrylic material.

4. the husky turbulent flow metering experimental situation matching device of a kind of water according to claim 1, which is characterized in that the grid Fixed plate is made of upper stationary plane and a series of baffles vertical with upper stationary plane.

5. the husky turbulent flow metering experimental situation matching device of a kind of water according to claim 1, which is characterized in that the grid The material of group is aluminium alloy, and the area accounting in hole is 60 percent in grid sets.

6. the husky turbulent flow metering experimental situation matching device of a kind of water according to claim 1, which is characterized in that the sliding block One-dimensional free movement can be carried out by being placed on guide rail, and the guide rail is fixedly connected with bracket.

7. the husky turbulent flow metering experimental situation matching device of a kind of water according to claim 1, which is characterized in that the grid Group is moved in the form of SIN function in the horizontal direction: L=Asin (f2 π t)

In formula, A is that amplitude is related with crank length, and f is that vibration frequency is related with motor rotation frequency, and t is the time, and L is grid Position.