Slurry uniformity monitoring and automatic control system for granite cutting tailings storage pool

Abstract

The present invention discloses a slurry uniformity monitoring and automatic control system for a granite cutting tailings storage tank. The system includes a column, a light-emitting disk, a mounting disk, an optical signal receiver, a data transmission line, a control subsystem, and a mixer. When the slurry does not submerge the optical signal receiver, light emitted by the light source directly hits the optical signal receiver, and the light intensity received by the optical signal receiver reaches a maximum value and remains stable. When the slurry submerges the optical signal receiver, the light emitted by the light source passes through a certain thickness of slurry and hits the optical signal receiver, and the light intensity received by the optical signal receiver attenuates. The thicker the slurry and the greater the slurry concentration, the greater the light intensity attenuation. The slurry concentration at the corresponding height is obtained based on the distance between the optical signal receiver submerged in the slurry and the slurry surface and the light intensity received by the optical signal receiver. The mixer is controlled to continue stirring, add water, or add powder. The present invention can monitor and control the slurry concentration and uniformity.

Description

Technical Field

[0001] The invention belongs to the technical field of construction, and in particular relates to a slurry uniformity monitoring and automatic control system for a granite cutting tailings storage pool. Background Art

[0002] As people's demand for a better life continues to increase, the construction process has gradually shifted from rapid development to high-quality development, and ready-mixed concrete is a vital raw material in the quality control of engineering construction. Compared with ordinary commodities, ready-mixed concrete has its own particularity. On the one hand, it exists as a semi-finished product. On the other hand, the relationship between the properties of the raw materials and the quality of the product is not a simple one-to-one relationship. This means that the factors affecting the quality of ready-mixed concrete need to be considered from its characteristics. Simply put, the quality of ready-mixed concrete is not only affected by the quality of the raw materials, but also by the production method, construction method, and so on. In addition, as a usable waste resource, the application of granite cutting tailings in concrete is essential for sustainable development and environmental protection construction.

[0003] Although there are currently relevant patents for granite cutting tailings in ready-mixed concrete, most of them are limited to granite cutting tailings products. For example, a method for producing ready-mixed concrete using stone saw mud (CN202110802540.1) pre-treats the saw mud stored in the yard, removes stones and debris inside the saw mud, and designs relevant mix ratios. However, saw mud still has a lot of problems in the actual production process of ready-mixed concrete, such as the inability to monitor the moisture content of the product in real time and the difficulty of feeding in actual production. In addition, the same is true for a high-strength concrete containing marble saw mud and its preparation method (CN114956676A).

[0004] Clearly, the current use of granite cutting waste is still largely inadequate, significantly impacting its application in concrete, concrete quality, and even project quality safety. Therefore, the present invention aims to develop a real-time monitoring and automatic control system for the uniformity of slurry in a granite cutting waste storage tank, thereby ensuring the quality stability of granite cutting waste during its use and ensuring its efficient and high-quality application in ready-mixed concrete production. Summary of the Invention

[0005] In response to the current problem of instability of key quality technical indicators during the use of granite cutting tailings, especially the instability of moisture content and uniformity indicators, the present invention provides a slurry uniformity monitoring and automatic control system for a granite cutting tailings storage tank. The system has a simple structure, convenient installation, and a high degree of automation. It can intuitively feedback the slurry concentration to concrete production technicians in real time, and controls the slurry concentration and uniformity through the automatic control system, forming a closed loop of information data collection and processing, effectively reducing human subjective errors, and thus ensuring the quality and safety of the project.

[0006] The technical solutions of the present invention are as follows:

[0007] A granite cutting tailings storage pool slurry uniformity monitoring and automatic control system, characterized in that the system includes a column, a light-emitting disk, a mounting disk, an optical signal receiver, a data transmission line, a control subsystem and a mixer; wherein:

[0008] A column is erected at the bottom of the slurry pool; a light disk is mounted on the column, and the light disk is provided with a vertically downward light source; there are N mounting disks, which are sequentially mounted on the column and all located below the light disks; there are N optical signal receivers, which are staggered and mounted on the N mounting disks; openings are provided at corresponding positions on all mounting disks above each optical signal receiver, so that light emitted by the light source passes through the openings and reaches the optical signal receiver; the N optical signal receivers are connected to a control subsystem via a data transmission line, and the control subsystem is connected to the mixer; where N = 2, 3, 4, etc.

[0009] When the slurry does not submerge the optical signal receiver, the light emitted by the light source directly hits the optical signal receiver. At this time, the light intensity received by the optical signal receiver reaches the maximum value and remains stable. When the slurry submerges the optical signal receiver, the light emitted by the light source passes through a certain thickness of slurry and hits the optical signal receiver. At this time, the light intensity received by the optical signal receiver is attenuated. The thicker the slurry is and the higher the concentration of the slurry is, the greater the light intensity attenuation is.

[0010] Obtaining the height of the slurry, calculating the distance between the optical signal receiver submerged in the slurry and the slurry surface based on the height of the optical signal receiver submerged in the slurry, and obtaining the concentration of the slurry at the corresponding height based on the distance between the optical signal receiver submerged in the slurry and the slurry surface and the light intensity received by the optical signal receiver; wherein there is a corresponding relationship between the distance between the optical signal receiver submerged in the slurry and the light intensity received by the optical signal receiver and the concentration of the slurry at the corresponding height;

[0011] Calculate the difference in slurry concentration at different heights; if the difference exceeds a set threshold, the control subsystem controls the mixer to continue stirring;

[0012] Calculate the average value of the slurry concentration at different heights; if the average value is higher than a first concentration rated value, the control subsystem controls the addition of water; if the average value is lower than a second concentration rated value, the control subsystem controls the addition of powder; wherein the first concentration rated value is greater than the second concentration rated value.

[0013] Furthermore, each mounting plate is provided with N openings, and the size and position of the corresponding openings on each mounting plate are the same; when the N mounting plates are sequentially arranged on the pillars, the corresponding openings are opposite to each other, so that the light emitted by the light source passes through the corresponding openings and reaches the opening of the mounting plate located at the bottom; an optical signal receiver is provided on one mounting plate, and the N optical signal receivers are staggered and arranged in the N openings respectively.

[0014] Furthermore, N mounting plates are arranged on the pillars at equal intervals.

[0015] Furthermore, the method for obtaining the height of the slurry is:

[0016] A distance sensing unit is set at the top of the column, and the distance from the slurry surface to the top of the column is obtained by using the distance sensing unit. The height of the slurry is obtained by subtracting the distance from the slurry surface to the top of the column from the height of the column.

[0017] Furthermore, the method for obtaining the height of the slurry is:

[0018] Determine whether the light intensity received by each optical signal receiver is attenuated; select the optical signal receiver with the highest height from the optical signal receivers with attenuated light intensity, and use its height value or its height value plus a preset height value or its height value and the average of the height values ​​of the optical signal receiver above it as the height of the slurry.

[0019] Furthermore, the optical signal receiver whose light intensity is attenuated is the optical signal receiver submerged in the slurry.

[0020] Furthermore, the control subsystem is a PLC controller.

[0021] Furthermore, the system also includes a concentration display for displaying the concentration of the slurry at different heights; N optical signal receivers are connected to the concentration display via data transmission lines, and the concentration display is connected to the control subsystem via the data transmission lines.

[0022] Furthermore, the material of the column is polytetrafluoroethylene, the data transmission line is connected to the light-emitting disk and the optical signal receiver from the inside of the column, and the light source is an ultraviolet light source.

[0023] Furthermore, when the light intensity received by the lowest optical signal receiver reaches a maximum value, powder is automatically added.

[0024] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0025] The present invention targets the end-user of granite cutting tailings, forms a closed-loop feedback mode through information collection, data transmission, information display, and data processing, converts concentration signals into electrical signals, and automatically controls slurry concentration and uniformity. It has a high degree of automation and ensures stable and reliable raw material quality.

[0026] The present invention designs a light-emitting disc suitable for various concentration levels, which has a simple structure, is easy to install and disassemble, has low manufacturing cost, low maintenance cost, and high structural reliability;

[0027] The present invention monitors the slurry uniformity according to the intensity of optical signals at different height levels. It can monitor the slurry concentration and uniformity in real time, and convert the relevant properties of the slurry into high-precision visual data, which is helpful for the supervision and monitoring of the production quality of ready-mixed concrete and ensure the quality and safety of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the slurry uniformity monitoring and automatic control system for the granite cutting tailings storage pool;

[0029] Figure 2 It is a schematic diagram of a light emitting disk;

[0030] Figure 3 This is a diagram of the installation disk.

[0031] In the figure: 1-column, 2-light-emitting disk, 3-first mounting disk, 4-second mounting disk, 5-third mounting disk, 6-fourth mounting disk, 7-data transmission line, 8-concentration display, 9-PLC controller, 10-mixer, 11-optical signal receiver, 12-opening, 13-column hole. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0033] Example 1

[0034] The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system of this embodiment includes a column, a light emitting disk, a mounting disk, an optical signal receiver, a data transmission line, a control subsystem and a mixer; wherein:

[0035] A column is erected at the bottom of a slurry pool; a light-emitting disk is mounted on the column, and the light-emitting disk is provided with a vertically downward light source; there are N mounting disks, which are sequentially mounted on the column and all located below the light-emitting disks; there are N optical signal receivers, which are staggered and respectively arranged on the N mounting disks; openings are provided at corresponding positions of all mounting disks above each optical signal receiver, so that light emitted by the light source passes through the openings and reaches the optical signal receiver; the N optical signal receivers are connected to a control subsystem via a data transmission line, and the control subsystem is connected to the mixer; wherein N = 2, 3, 4, ...

[0036] In this embodiment, the top mounting plate needs to be provided with N-1 openings so that the N-1 optical signal receivers below can receive the light emitted by the light source; the second top mounting plate needs to be provided with N-2 openings, and so on, and the bottom mounting plate does not need to be provided with openings.

[0037] When the slurry doesn't submerge the optical signal receiver, the light from the light source directly hits the receiver, and the light intensity received by the receiver reaches its maximum value and remains stable. When the slurry submerges the optical signal receiver, the light from the light source passes through a certain thickness of slurry to reach the receiver, and the light intensity received by the receiver attenuates. The thicker the slurry and the greater the slurry concentration, the greater the light intensity attenuation. Therefore, when the light intensity received by the receiver remains at its maximum value, it indicates that the receiver is not submerged in the slurry. In other words, an optical signal receiver experiencing light intensity attenuation is a receiver submerged in the slurry.

[0038] The height of the slurry is obtained, and the distance between the optical signal receiver submerged in the slurry and the slurry surface is calculated in combination with the height of the optical signal receiver submerged in the slurry. The concentration of the slurry at the corresponding height is obtained based on the distance between the optical signal receiver submerged in the slurry and the slurry surface and the light intensity received by the optical signal receiver; wherein, there is a corresponding relationship between the distance between the optical signal receiver submerged in the slurry and the light intensity received by the optical signal receiver and the concentration of the slurry at the corresponding height.

[0039] Among them, a distance sensor can be used to obtain the height of the slurry. The method is as follows: a distance sensing unit is set at the top of the column, and the distance sensing unit, such as an optical transceiver unit, is used to obtain the distance from the slurry surface to the top of the column. Then, the height of the slurry is obtained by subtracting the distance from the slurry surface to the top of the column from the height of the column.

[0040] Furthermore, it is possible to determine whether the light intensity received by each optical signal receiver has attenuated. Among the optical signal receivers with attenuated light intensity, the highest optical signal receiver is selected, and its height, or its height plus a preset height, or the average of its height and the height of the optical signal receiver above it, is used as the slurry height. Similarly, this method can prevent the slurry surface from exceeding the height of the light-emitting disk.

[0041] Finally, the difference in slurry concentration at different heights is calculated; if this difference exceeds a set threshold, the control subsystem controls the mixer to continue stirring. The threshold can be set based on the height difference corresponding to the slurry concentration difference. When the height difference between the two slurry concentrations at which the difference is calculated is large, the threshold should also be set higher. The specific value can be obtained based on actual calibration.

[0042] The average concentration of the slurry at different heights is calculated. If the average value is higher than a first concentration rating, the control subsystem controls the addition of water. If the average value is lower than a second concentration rating, the control subsystem controls the addition of powder. The first concentration rating is greater than the second concentration rating. To better calculate the average concentration of the slurry at different heights, the optical signal receivers can be arranged closer together, with at least two optical signal receivers submerged by the slurry surface. If the slurry submerges only one optical signal receiver, the value is the average.

[0043] The system can also be provided with a concentration display for displaying the concentration of the slurry at different heights; N optical signal receivers are connected to the concentration display via data transmission lines, and the concentration display is connected to the control subsystem via the data transmission lines.

[0044] Example 2

[0045] The present invention also provides another embodiment, in which each mounting plate is provided with N openings, and the size and position of the corresponding openings on each mounting plate are the same; when the N mounting plates are sequentially arranged on the column, the corresponding openings are opposite to each other, so that the light emitted by the light source can pass through the N corresponding openings and reach the opening of the mounting plate located at the bottom; finally, an optical signal receiver is provided on each mounting plate, but each optical signal receiver is respectively arranged at a different corresponding opening, so that the N optical signal receivers can all receive the light emitted by the light source.

[0046] Example 3

[0047] like Figure 1 、 Figure 2 and Figure 3As shown, the real-time monitoring and automatic control system for slurry concentration in a granite cutting tailings storage tank of this embodiment includes a column 1, a light-emitting disk 2, a first mounting disk 3, a second mounting disk 4, a third mounting disk 5, a fourth mounting disk 6, an optical signal receiver 11, a data transmission line 7, a concentration display 8, a PLC controller 9, and a mixer 10. The data transmission line 7 passes through the column 1, connecting the light-emitting disk 2, the optical signal receiver 11, the concentration display 8, the PLC controller 9, and the mixer 10. The light-emitting disk 2 is mounted above the column 1 and is equipped with a vertical, downward-facing ultraviolet light source. The first mounting disk 3, the second mounting disk 4, the third mounting disk 5, and the fourth mounting disk 6 are equidistantly mounted on the column 1. Each of the first mounting disk 3, the second mounting disk 4, the third mounting disk 5, and the fourth mounting disk 6 has four openings 12 evenly spaced, and the optical signal receiver 11 is placed in one of the openings 12. To ensure that light from the light source reaches the lowest mounting plate, the optical signal receivers 11 are staggered: the first optical signal receiver is located at the first opening of the first mounting plate, the second optical signal receiver is located at the second opening of the second mounting plate, and so on. The mounting plates are also provided with post holes 13 to secure the mounting plates to the post holes.

[0048] The optical signal receiver 11 can receive the light signal emitted by the light emitting disk 2. The concentration display 8 can display the slurry uniformity within a certain height range according to the current light signal intensity and the distance between the optical signal receiver and the slurry surface. The PLC controller 9 can control the operation of the mixer according to the uniformity.

[0049] Preferably, the column is made of polytetrafluoroethylene, and the data transmission line is connected to the light-emitting disk from the inside of the column, with a diameter of 5 to 10 mm. The light-emitting disk has a diameter of 30 mm and a thickness of 3 mm. The aperture is 12 mm.

[0050] The specific installation and use process of the present invention includes the following steps:

[0051] Step 1: Install the column at the bottom of the slurry pool;

[0052] Step 2: Start the real-time monitoring and automatic control system for slurry uniformity;

[0053] Step 3: The light-emitting disk emits light and irradiates different light signal receivers;

[0054] Step 4: The concentration display shows the concentration of each layer of slurry in turn according to the different light signal intensities, a total of 4 layers;

[0055] Step 5: When the concentration difference among the four layers is too large, the PLC controller controls the mixer to rotate continuously. When the average concentration is higher than the rated concentration, the PLC controller controls the water pump to add water. When the average concentration is lower than the rated concentration, the PLC controller controls the slurry tank to add powder.

[0056] Step 6: When the average concentration meets the rated value requirement and the concentration difference meets the requirement, the slurry in the slurry tank is used for concrete production;

[0057] When the bottom receiver reaches the maximum signal, powder is automatically added. The powder is added from a unified source and the moisture content is ≤20%.

[0058] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0059] It will be easily understood by those skilled in the art that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A slurry uniformity monitoring and automatic control system for a granite cutting tailings storage pool, characterized in that: The system includes a column, a light-emitting plate, a mounting plate, an optical signal receiver, a data transmission line, a control subsystem and a mixer; wherein: A column is erected at the bottom of the slurry pool; a light disk is mounted on the column, and the light disk is provided with a vertically downward light source; there are N mounting disks, which are sequentially mounted on the column and all located below the light disks; there are N optical signal receivers, which are staggered and mounted on the N mounting disks; openings are provided at corresponding positions on all mounting disks above each optical signal receiver, so that light emitted by the light source passes through the openings and reaches the optical signal receiver; the N optical signal receivers are connected to a control subsystem via a data transmission line, and the control subsystem is connected to the mixer; where N = 2, 3, 4, etc. When the slurry does not submerge the optical signal receiver, the light emitted by the light source directly hits the optical signal receiver. At this time, the light intensity received by the optical signal receiver reaches the maximum value and remains stable. When the slurry submerges the optical signal receiver, the light emitted by the light source passes through a certain thickness of slurry and hits the optical signal receiver. At this time, the light intensity received by the optical signal receiver is attenuated. The thicker the slurry is and the higher the concentration of the slurry is, the greater the light intensity attenuation is. Obtaining the height of the slurry, calculating the distance between the optical signal receiver submerged in the slurry and the slurry surface based on the height of the optical signal receiver submerged in the slurry, and obtaining the concentration of the slurry at the corresponding height based on the distance between the optical signal receiver submerged in the slurry and the slurry surface and the light intensity received by the optical signal receiver; wherein there is a corresponding relationship between the distance between the optical signal receiver submerged in the slurry and the light intensity received by the optical signal receiver and the concentration of the slurry at the corresponding height; Calculate the difference in slurry concentration at different heights; if the difference exceeds a set threshold, the control subsystem controls the mixer to continue stirring; Calculate the average value of the slurry concentration at different heights; if the average value is higher than a first concentration rated value, the control subsystem controls the addition of water; if the average value is lower than a second concentration rated value, the control subsystem controls the addition of powder; wherein the first concentration rated value is greater than the second concentration rated value.

2. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1 is characterized in that: Each mounting plate is provided with N openings, and the corresponding openings on each mounting plate are identical in size and position; when the N mounting plates are sequentially arranged on the pillars, the corresponding openings face each other, so that light emitted by the light source passes through the corresponding openings and reaches the opening of the mounting plate located at the bottom; one optical signal receiver is provided on each mounting plate, and the N optical signal receivers are staggered and placed in the N openings.

3. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1 is characterized in that: N mounting plates are arranged on the columns at equal intervals.

4. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1 or 3, characterized in that: The method for obtaining the height of the slurry is: A distance sensing unit is set at the top of the column, and the distance from the slurry surface to the top of the column is obtained by using the distance sensing unit. The height of the slurry is obtained by subtracting the distance from the slurry surface to the top of the column from the height of the column.

5. The granite cutting tailings storage tank slurry uniformity monitoring and automatic control system according to claim 1 or 3, characterized in that: The method for obtaining the height of the slurry is: Determine whether the light intensity received by each optical signal receiver is attenuated; select the optical signal receiver with the highest height from the optical signal receivers with attenuated light intensity, and use its height value or its height value plus a preset height value or its height value and the average of the height values ​​of the optical signal receiver above it as the height of the slurry.

6. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1 is characterized in that: The optical signal receiver whose light intensity is attenuated is the optical signal receiver submerged in the slurry.

7. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1 is characterized in that: The control subsystem is a PLC controller.

8. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1 is characterized in that: The system also includes a concentration display for displaying the concentration of slurry at different heights; N optical signal receivers are connected to the concentration display via data transmission lines, and the concentration display is connected to the control subsystem via the data transmission lines.

9. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1, characterized in that: The material of the column is polytetrafluoroethylene, and the data transmission line connects the light-emitting disk and the optical signal receiver from the inside of the column. The light source is an ultraviolet light source.

10. The granite cutting tailings storage pool slurry uniformity monitoring and automatic control system according to claim 1, characterized in that: When the light intensity received by the lowest optical signal receiver reaches the maximum value, powder is automatically added.

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