CN211235381U - Image rheometer - Google Patents

Abstract

The utility model provides an image rheometer relates to and floats mud measurement technical field. The rheometer comprises a mud storage tank, a mud groove, a mud recovery tank, a support column, a jacking device and an image acquisition device. The mud groove and the bottom of the mud storage box are positioned on the same plane and fixedly connected; one end of the mud groove in the horizontal placement direction is provided with a first opening, and the other end of the mud groove is provided with a second opening; the first opening is in fluid communication with the bottom opening of the sludge storage tank, and the first opening is connected with the bottom opening through a gate; the mud recovery tank has a top opening and is in fluid communication with the second opening; the support column is arranged below the bottom of the mud groove and close to one end of the mud recovery box; the jacking device is arranged below the bottom of the sludge storage box and used for lifting the sludge storage box and the sludge tank to a certain height; the image acquisition device is used for acquiring the motion condition of the floating mud in the mud groove. The rheometer has the advantages of simple structure, low cost, realization of in-situ measurement and simple operation.

Description

an image rheometer

technical field

The utility model relates to the technical field of floating mud measurement, in particular to an image rheometer.

Background technique

Floating mud widely exists in estuaries, silty coasts, lakes, reservoirs and other water environments. The existence of floating mud can cause siltation in estuaries, harbors, waterways, etc. on the one hand, affecting its normal operation and costing a lot of maintenance costs; On the other hand, due to the adsorption of pollutants by fine-grained sediment and its transport with water flow, its discharge will cause secondary pollution to the water environment. Therefore, the transport law of floating mud is a very concerned issue in waterway construction and marine environment research.

In order to study the motion characteristics of floating mud, it is necessary to determine the rheological properties of floating mud. Yield stress and viscosity are important parameters to characterize rheological properties. The measurement of rheological properties mostly uses high-precision commercial rheometers. However, high-precision rheometers are often expensive, have certain experience requirements for operators, and have certain requirements for sample preparation, and it is impossible to perform (field) original experiments. Bit measurement. To overcome the above problems, it is necessary to develop new instruments and new methods that are easy to implement.

Utility model content

The utility model provides an image rheometer, which has simple structure and low cost, can realize in-situ measurement, and is simple to operate, and can obtain rheological properties such as yield stress and viscosity of floating mud.

In order to solve the above technical problems, the first embodiment of the present utility model provides an image rheometer, including:

Mud storage box, used to store the floating mud used in the experiment;

The mud tank is used to test the movement of floating mud; the bottom of the mud tank and the mud tank are located on the same plane and fixedly connected; one end of the mud tank in the horizontal direction is provided with a first opening, and the other end is provided with a a second opening; the first opening is in fluid communication with the bottom opening of the mud tank, and a gate is connected between the first opening and the bottom opening;

a recovery mud box having a top opening in fluid communication with the second opening for recovering floating mud flowing from the mud tank;

a support column, arranged below the bottom of the mud tank and close to one end of the recovery mud box;

A jacking device is arranged below the bottom of the mud tank, and is used to lift the mud tank and the mud tank connected with the mud tank to a certain height, so that the floating in the mud tank can be lifted to a certain height. Mud gets flow velocity;

The image acquisition device is used to acquire the floating mud movement in the mud tank.

As a further optimization, the image acquisition device includes a first acquisition device disposed on the top of the mud tank and a second acquisition device disposed on one side of the mud tank in the horizontal direction.

As a further optimization, the mud tank is integrally formed with the bottom of the mud tank.

As a further optimization, the image acquisition device includes a camera bracket and a binocular camera mounted on the camera bracket.

As a further optimization, the mud storage box, the mud tank and the recovery mud box are all made of transparent materials.

As a further optimization, the transparent material is transparent glass or transparent plastic.

As a further optimization, the mud tank is a rectangular tank body, and the length in the horizontal direction of the tank body is greater than the height in the vertical direction of the tank body.

By adopting the above-mentioned technical scheme, the utility model can obtain the following technical effects:

The image rheometer provided by the first embodiment of the present utility model has a simple structure and low cost, and can realize in-situ measurement. By lifting the mud tank, the bottom of the mud tank forms a certain inclination angle with the horizontal plane, so that the floating mud in the mud tank flows in the mud tank under the action of its own gravity, and at the same time, the image acquisition device is controlled to collect the floating mud movement in the mud tank. , and finally through fitting and calculation, the rheological properties such as yield stress and viscosity of floating mud can be obtained.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention. Therefore, it should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of an image rheometer provided by the first embodiment of the present invention.

Markings in the figure: 1 - mud tank; 11 - bottom opening; 2 - mud tank; 21 - first opening; 22 - second opening; 23 - gate; 3 - recovery mud box; 31 - top opening; 4 - support Column; 5-jacking device; 6-image acquisition device.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments of the present invention are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise" etc. Or the positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, so it cannot be construed as a limitation to the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Example

Below in conjunction with the accompanying drawings and specific embodiments, the present utility model is described in further detail:

As shown in FIG. 1 , the first embodiment of the present invention provides an image rheometer, including a mud storage box 1, a mud tank 2, a recovery mud box 3, a support column 4, a jacking device 5 and an image acquisition device. 6.

The mud tank 1 is used to store the floating mud used in the experiment. As shown in FIG. 1 , the mud tank 1 can be a cuboid or a cylinder, and its shape is not limited, but its volume is larger than that of the mud tank 2 to ensure that enough floating mud is stored in the mud tank 1 for the normal conduct of the experiment.

Mud tank 2 is used to test the movement of floating mud. The bottom of the mud tank 2 and the mud storage box 1 are located on the same plane and are fixedly connected; one end of the mud tank 2 in the horizontal placement direction is provided with a first opening 21, and the other end is provided with a second opening 22; the first opening 21 and the mud storage box The bottom opening 11 of 1 is in fluid communication, and the first opening 21 and the bottom opening 11 are connected by a gate 23 .

More specifically, in this embodiment, as shown in FIG. 1 , the bottom of the mud tank 2 and the mud storage box 1 are located on the same plane and are fixedly connected to ensure that when the mud storage box 1 is jacked up by the jacking device 5, Due to the connection between the bottom of the mud tank 2 and the mud storage tank 1, the mud tank 2 also follows the mud storage tank 1 to be lifted. A bottom opening 11 is provided on the side of the mud storage box 1 close to the bottom, and the side where the bottom opening 11 is located is closely connected with one end side of the first opening 21 opened in the horizontal placement direction of the mud tank 2, on the one hand, to ensure that the mud storage box 1 and the mud tank 2 are The connection is tighter to avoid separation of the two during the lifting process; on the other hand, the fluid communication process between the first opening 21 and the bottom opening 11 is ensured to be more smooth and unobstructed. A gate 23 is arranged between the first opening 21 and the bottom opening 11 to control the floating mud in the mud storage tank 1 to flow into the mud tank 2. First, to ensure that the floating mud can be stored in the mud storage tank 1 before the experiment starts, The second is to open the gate 23 after the experiment starts, allowing the floating mud in the mud storage tank 1 to flow into the mud tank 2 to ensure accurate acquisition of the rheological properties of the floating mud to ensure the accuracy of the experiment. It should be noted that the gate 23 can be opened by electronic control or manually, which is not limited here. The bottom connection method and side connection method of the mud tank 2 and the mud storage tank 1 can be connected by welding or welding to ensure the stability of the connection, but it is not limited to this, and it is not limited here.

As a further optimization, in a preferred embodiment of the present invention, the bottom of the mud storage box 1 and the mud tank 2 are integrally formed. The bottom of the mud tank 1 and the mud tank 2 are integrally formed. On the one hand, it ensures that the mud tank 1 and the mud tank 2 are lifted at the same inclination angle, which facilitates the flow of floating mud; on the other hand, it further ensures that the mud tank 1 and the mud tank 2 are stable. connection relationship.

As a further optimization, in another embodiment of the present invention, the mud tank 2 is a rectangular tank body, and the length of the tank body in the horizontal direction is greater than the height of the tank body in the vertical direction. As shown in Figure 1, since the mud tank 2 is a tank body for the flow of floating mud, the tank body is set in a slender shape with a rectangular cross-section. The elongated shape can increase the length of the floating mud flow and further ensure the rheological properties of the floating mud. , the cross section is rectangular, which is convenient for the installation of the mud tank 2.

The recovery mud tank 3 has a top opening 31 which is in fluid communication with the second opening 22 for recovering the floating mud flowing out of the mud tank 2 . As shown in FIG. 1 , the recovery mud box 3 is arranged below the second opening 22 of the mud tank 2 to ensure that the floating mud flowing out of the mud tank 2 flows into the recovery mud box 3 through the second opening 22 and the top opening 31 for recovery, so as to avoid causing It can also ensure that the floating mud does not stay in the mud tank 2, which will affect the experiment.

The support column 4 is arranged below the bottom of the mud tank 2 and close to one end of the recovery mud box 3. On the one hand, the height of the mud tank 2 can be raised to ensure that the top opening 31 of the recovery mud box 3 is located below the second opening 22, and on the other hand, it supports The column 4 and the jacking device 5 are at the same height in the un-lifted state, and can be used together with the jacking device 5 to support the tank body of the mud tank 2; it can also be used as a support point. When the jacking device 5 lifts the mud tank 2, the Slot 2 provides stable support.

The jacking device 5, as shown in FIG. 1, is arranged below the bottom of the mud tank 1, and is used to lift the mud tank 1 and the mud tank 2 connected with the mud tank 1 to a certain height, so that the bottom of the mud tank 2 is lifted to a certain height. A certain inclination angle is formed with the horizontal plane, through the inclination angle, the floating mud in the mud storage tank 1 can flow into the mud tank 2 by its own gravity, so that the floating mud in the mud tank 2 can obtain the flow speed. Among them, the range of the inclination angle is between 5° and 10°, which is more suitable for the flow speed of floating mud in the natural environment. It should be noted that the jacking device 5 can be a lifting rod. One end of the lifting rod is connected to the bottom of the mud storage box 1 and the other end is connected to the base. The lifting rod is in the prior art and will not be repeated here.

The image acquisition device 6 is used to obtain the floating mud movement in the mud tank 2. The floating mud flow obtained by the image acquisition device 6 can be combined with computer fitting and calculation to obtain the flow rate and thickness information of the floating mud, so that the Calculate the yield stress and viscosity information of floating mud.

As a further optimization, in a preferred embodiment of the present invention, the image acquisition device 6 includes a first acquisition device disposed on the top of the mud tank 2 and a second acquisition device disposed on one side of the mud tank 2 in the horizontal direction. The first collection device is used to obtain the flow velocity information on the surface of the floating mud, and the second collection device is used to obtain the thickness information of the floating mud.

As a further optimization, the image acquisition device 6 includes a camera bracket and a binocular camera mounted on the camera bracket. The camera bracket ensures the stability of the binocular camera during the shooting process, and the binocular camera is an imaging device based on the principle of parallax. It can obtain two images of the measured floating mud from different positions. The position deviation can be used to obtain the three-dimensional geometric information of the floating mud to further ensure the accuracy of the experiment.

As a further optimization, the mud storage box 1, the mud tank 2 and the recovery mud box 3 are all made of transparent materials, which is convenient for observing the movement of floating mud. Preferably, the transparent material is transparent glass or transparent plastic. More preferably, the transparent material is transparent plastic, which has low cost, is less breakable, and is easier to install in-situ.

The image rheometer provided by the first embodiment of the present utility model has a simple structure and low cost, and can realize in-situ measurement. By lifting the mud tank 2, the bottom of the mud tank 2 forms a certain inclination angle with the horizontal plane, so that the floating mud in the mud tank 1 flows in the mud tank 2 under the action of its own gravity, and at the same time, the image acquisition device 6 is controlled to collect the mud tank. 2 The movement of the floating mud, and finally through fitting and calculation, the rheological properties such as the yield stress and viscosity of the floating mud can be obtained.

The second embodiment of the present invention also provides a method for measuring the yield stress and viscosity of floating mud, using the above-mentioned image rheometer to measure the yield stress and viscosity of floating mud, including the following steps:

S1, close the gate 23, and arrange the floating mud in the mud storage tank 1. This step can ensure that enough floating mud is stored in the mud storage tank 1 before the experiment is started so that the experiment can be carried out.

S2, control the jacking device 5 to lift the mud storage tank 1 to a certain height, so that the bottom of the mud tank 2 forms a certain inclination angle with the horizontal plane. Among them, the range of the inclination angle is between 5° and 10°, which is more suitable for the flow speed of floating mud in the natural environment and ensures the accuracy of the experiment.

S3, open the gate 23, so that the floating mud in the mud tank 1 flows to the recovery mud tank 3 in the mud tank 2 under the action of its own gravity, and at the same time control the second collecting device to collect the thickness image of the floating mud in the mud tank 2, It is used to fit the profile curve of floating mud thickness to obtain the yield stress of floating mud.

More specifically, open the gate 23 between the mud tank 1 and the mud tank 2, so that the floating mud in the mud tank 1 flows along the mud tank 2 under the action of its own weight, and the thickness profile curve of the floating mud is along the length of the mud tank 2. The direction changes, and after a period of time, the floating mud reaches a critical state, and its thickness does not change, that is, the thickness profile curve of the floating mud does not change. The friction force at the bottom of the mud tank 2 corresponding to the critical state is the yield stress of the floating mud. According to the fitting of the thickness profile curve of the floating mud, the yield stress of the floating mud can be calculated.

S4, when the thickness of the floating mud in the mud tank 2 no longer changes, sprinkle tracer particles on the floating mud surface of the mud tank 2, and record the movement of the tracer particles through the first collecting device to obtain the flow velocity of the floating mud surface.

S5, obtain the viscosity of the floating mud according to the flow velocity of the floating mud surface and the thickness of the floating mud. It should be noted that the fitting process of the floating mud flow rate and the thickness profile curve is in the prior art, and details are not described here.

The second embodiment of the present invention provides a method for measuring the yield stress and viscosity of floating mud. By using the image rheometer of the first embodiment, rheological properties such as yield stress and viscosity of floating mud can be obtained. The samples do not need special handling, and the operator only needs simple training to get started, and the operation is simple.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (7)

1. an image rheometer, is characterized in that, comprises: Mud storage box, used to store the floating mud used in the experiment; The mud tank is used to test the movement of floating mud; the bottom of the mud tank and the mud tank are located on the same plane and fixedly connected; one end of the mud tank in the horizontal direction is provided with a first opening, and the other end is provided with a a second opening; the first opening is in fluid communication with the bottom opening of the mud tank, and a gate is connected between the first opening and the bottom opening; a recovery mud box having a top opening in fluid communication with the second opening for recovering floating mud flowing from the mud tank; a support column, arranged below the bottom of the mud tank and close to one end of the recovery mud box; A jacking device is arranged below the bottom of the mud tank, and is used to lift the mud tank and the mud tank connected with the mud tank to a certain height, so that the floating in the mud tank can be lifted to a certain height. Mud gets flow velocity; The image acquisition device is used to acquire the floating mud movement in the mud tank. 2 . The image rheometer according to claim 1 , wherein the image acquisition device comprises a first acquisition device disposed on the top of the mud tank and a second acquisition device disposed on one side of the mud tank in the horizontal direction. 3 . collection device. 3 . The image rheometer according to claim 2 , wherein the mud storage box is integrally formed with the bottom of the mud tank. 4 . 4. The image rheometer according to claim 2, wherein the image acquisition device comprises a camera bracket and a binocular camera mounted on the camera bracket. 5 . The image rheometer according to claim 2 , wherein the mud storage box, the mud tank and the recovery mud box are all made of transparent materials. 6 . 6. The image rheometer according to claim 5, wherein the transparent material is transparent glass or transparent plastic. 7 . The image rheometer according to claim 2 , wherein the mud trough is a rectangular trough body, and the length of the trough body in the horizontal direction is greater than the height of the trough body in the vertical direction. 8 .

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