CN114526449A - Leakage detection system for mine tailing buried conveying pipeline - Google Patents

Abstract

The invention provides a leakage detection system for a tailing buried conveying pipeline, which is characterized by comprising a front-end detection instrument, a rear-end monitoring unit and a controller, wherein the front-end detection instrument is connected with the controller; the front-end detection instrument is arranged at a preset position of the conveying pipeline and used for detecting data of the preset position; the controller is connected with the front-end detection instrument and the rear-end monitoring unit; the controller is used for receiving data detected by the front-end detection instrument, and calculating, analyzing and judging the data through a preset algorithm in the controller; and the rear end monitoring unit is used for alarming the data which are not in accordance with the judged conditions so as to ensure the normal transportation of the conveying pipeline. By utilizing the leakage detection system for the underground tailing conveying pipeline, automatic early warning of leakage of the underground tailing conveying pipeline is realized.

Description

Tailings buried pipeline leak detection system

technical field

The invention relates to the technical field of pipeline leakage detection, and more particularly, to a leakage detection system for tailings buried transportation pipelines.

Background technique

With the progress of society and the development of technology, the mining of mines has become more and more common and mature. In this context, the disposal of tailings becomes increasingly important.

In the prior art, the ore mined from the mine enters the beneficiation plant for sorting operations, and after the useful target components are extracted, the remaining unextractable ore elements are recovered together with the ore slurry, and the recovered ore slurry is the tailings. The tailings are transported to the tailings dam for unified treatment through pipelines, and when technical and economic conditions permit, they will be developed again. The tailings contain a large amount of heavy metal ions, even arsenic, mercury and other pollutants, as well as various chemicals added in the beneficiation operation. Once the pipeline leaks, it will cause serious harm to the surrounding environment.

In the actual operation process, the transmission pipeline often causes leakage due to various reasons such as the quality of the pipeline itself, the wear and tear of the slurry, and the complex underground environment. The leakage of the buried pipeline of the tailings dam not only causes significant economic losses to enterprises, but also causes environmental pollution.

The existing solution is to use manual inspections, specifically three-shift inspections. Leaks are found during the inspection process, and then reported to the excavation maintenance management. Therefore, it is an after-the-fact measure, and the time when the leakage is found completely depends on the inspection personnel. However, because the tailings transportation pipeline is generally more than a few kilometers, the workload of manual inspection is relatively large, and the second or third shift is not only expensive, but also causes heavy losses to the enterprise and society due to untimely detection.

Therefore, there is an urgent need for a system for online detection of slurry transportation pipelines. By monitoring pipeline flow and pressure parameters in real time, it can realize automatic early warning of pipeline leakage, and accurately locate the problems to be solved, which greatly reduces the labor cost of enterprises. , and when the leakage occurs, the leakage can be found as soon as possible, the economic loss of the enterprise can be minimized, and at the same time, the environmental pollution can be reduced.

SUMMARY OF THE INVENTION

In view of the above problems, the purpose of the present invention is to provide a leakage detection system for buried tailings transportation pipelines, which has solved the technical problems existing in the prior art. In the invention, detection instruments are arranged on the two ends of the conveying pipeline and on the pipeline, and the preset algorithm of the controller is used to calculate and analyze, and finally realize the automatic early warning and precise positioning of the transportation feeling.

The invention specifically provides a leakage detection system for tailings buried conveying pipeline, comprising a front-end detection instrument, a back-end monitoring unit and a controller; wherein,

The front-end detection instrument is arranged at a preset position of the conveying pipeline, and is used to detect the data of the preset position;

The controller is connected to the front-end detection instrument and the back-end monitoring unit; it is used to receive data detected by the front-end detection instrument, and to calculate and analyze the data through a preset algorithm inside the controller ,judge;

The back-end monitoring unit is configured to give an alarm to the data that does not meet the judgment condition, so as to ensure the normal transportation of the conveying pipeline.

In addition, a preferred solution is that the front-end detection instrument includes a flow meter and a pressure detection meter; wherein,

The flowmeter includes the outlet flowmeter of the slurry conveying pump, the flowmeter in the middle of the conveying pipeline and the inlet pipeline flowmeter of the tailings dam recovery pool;

The pressure detection gauge includes a pressure detection gauge at the outlet of the slurry conveying pump, a pressure detection gauge in the middle of the conveying pipeline, and a pressure detection gauge at the inlet pipeline of the tailings dam recovery pool.

In addition, a preferred solution is that the number of the flowmeter in the middle of the delivery pipeline and the pressure detection gauge in the middle of the delivery pipeline is at least two.

In addition, a preferred solution is that the transmission mode of the detection data of the flowmeter and the pressure detection meter includes wireless transmission and wired transmission.

In addition, a preferred solution is that the controller includes a PLC controller.

In addition, a preferred solution is that the back-end monitoring unit includes an image display; wherein,

The image display is used for displaying the operation interface and storing the data, and performing a pop-up window, flashing alarm or sound and light alarm for the data that does not meet the judgment condition.

In addition, a preferred solution is that the preset algorithm includes judging all the front and rear ends of the entire section of the conveying pipeline from the outlet of the slurry conveying pump at the end to the inlet of the tailings dam recovery tank at the tail. Whether the difference of the front-end detection instrument meets the preset range; wherein,

Establishing a data-driven model for the measured value of the front-end detection instrument that meets the preset range and is retained;

alarm for the triggering alarm control module that does not meet the preset range;

The difference is a detected data difference between the tail and the end.

In addition, a preferred solution is that the alarm control module includes a single-parameter alarm and a dual-parameter alarm; wherein,

The single-parameter alarm is an alarm that any one of the flow data or the pressure data is abnormal;

The two-parameter alarm is an alarm that both the flow data and the pressure data are abnormal.

In addition, a preferred solution is that the single-parameter alarm includes pop-up and flickering of the picture parameters on the image display;

The dual-parameter alarm includes pop-up and flashing of the picture parameter and sound and light alarm.

Using the above-mentioned leakage detection system for tailings buried transportation pipeline according to the present invention can ensure the real-time detection of the transportation status of the transportation pipeline through the flow meter and the pressure detection meter, give early warning and accurate positioning of the location where leakage may occur, and reduce labor costs. , and through the combination of man and machine, the normal operation of the pipeline is guaranteed.

To the achievement of the above and related objects, one or more aspects of the invention comprise the features hereinafter described in detail and particularly pointed out in the claims. The following description and accompanying drawings illustrate certain exemplary aspects of the invention in detail. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the present invention is intended to include all such aspects and their equivalents.

Description of drawings

Other objects and results of the present invention will be more apparent and readily understood by reference to the following description taken in conjunction with the accompanying drawings and the contents of the claims, and as the present invention is more fully understood. In the attached image:

Figure 1 shows a schematic structural diagram of a tailings buried pipeline leak detection system according to the present invention;

Fig. 2 shows the judgment schematic diagram of the data-driven control model of the flow parameter according to the present invention;

Fig. 3 shows the judgment diagram of the data-driven control model of the pressure parameter according to the present invention; and,

FIG. 4 shows a schematic diagram of a specific embodiment of a tailings buried pipeline leak detection system according to the present invention.

Description of reference numbers:

1. Pulp conveying pump; 2. Conveying pipeline; 3. Outlet flow meter of slurry conveying pump; 4. Outlet pressure detection meter of slurry conveying pump; 5. Flow meter in the middle of conveying pipeline; 6. Pressure detection meter in the middle of conveying pipeline; The inlet pipeline flowmeter of the dam recovery pool; 8. The pressure detection meter of the tailings dam recovery inlet pipeline; 9. The tailings dam recovery pool.

The same reference numbers indicate similar or corresponding features or functions throughout the drawings.

Detailed ways

In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It will be apparent, however, that the embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Figure 1 shows a schematic structural diagram of a tailings buried pipeline leak detection system according to the present invention;

FIG. 2 shows a schematic diagram of the judgment of the data-driven control model of the flow parameter according to the present invention; and FIG. 3 shows a schematic diagram of the judgment of the data-driven control model of the pressure parameter according to the present invention.

As shown in Figures 1 to 3, the leakage detection system of the tailings buried transportation pipeline of the present invention includes a front-end detection instrument, a back-end monitoring unit and a controller.

Among them, the front-end detection instrument is set at the preset position of the conveying pipeline, and is used to detect the data of the preset position; the controller is connected with the front-end detection instrument and the back-end monitoring unit; it is used to receive the data detected by the front-end detection instrument, and through the controller The internal preset algorithm calculates, analyzes and judges the data; the back-end monitoring unit is used to alert the data that does not meet the judgment conditions to ensure the normal transportation of the pipeline.

In an embodiment of the present invention, the front-end detection instrument includes a flow meter and a pressure detection meter; wherein the flow meter includes an outlet flow meter of a slurry conveying pump, a flow meter in the middle of the conveying pipeline, and a pipeline flow meter at the inlet of the tailings dam recovery tank; the pressure detection meter Including the outlet pressure detection meter of the slurry pump, the pressure detection meter in the middle of the conveying pipeline and the inlet pipeline pressure detection meter of the tailings dam recovery pool.

Specifically, the number and position of the flow meter and pressure detection meter are set correspondingly to ensure the accuracy of the system's detection of the transmission pipeline. The data of the two-item indicators of flow data and pressure data are compared with the preset difference range. The data in the value range will be alerted in time.

Due to the long-distance characteristics of the buried tailings pipeline, if only detection instruments are installed at the inlet and outlet of the pipeline, on the one hand, there will be a large lag in real-time data. The workload has not been reduced, so the system adopts multi-point multi-parameter detection, which not only improves the accuracy of leakage alarm, but also improves the positioning accuracy.

In the embodiment of the present invention, the number of the flow meter in the middle of the delivery pipeline and the pressure detection gauge in the middle of the delivery pipeline is at least two. The specific number of settings is determined according to the actual situation of the site, and can meet the design requirements.

Specifically, the conveying pipeline is divided into a straight pipe section and a curved section. Each flowmeter and pressure detection gauge installed on the straight pipe section is set at an interval of 500m, and each curved section is set with a flowmeter and a pressure detection gauge. . More specifically, the setting interval of the flow meter and the pressure detection gauge set on the straight pipe section can be between 400m and 700m. The above data represent the data set in this embodiment and are for reference only.

In the embodiment of the present invention, the detection data transmission modes of the flow meter and the pressure detection gauge include wireless transmission and wired transmission. The transmission method of flowmeter and pressure detection gauge can be wired or wireless by laying pipelines. The data of wired transmission is stable and the process is mature, but laying pipelines wastes manpower and material resources, and it is necessary to pay attention to pipelines while manually inspecting the pipelines. Integrity; wireless transmission eliminates the need for piping, however, it is necessary to ensure the strength of the signal at the location where the flow meter and pressure gauge are set. Taking into account the actual operation, the tailings dam transportation pipeline is generally in the range of several kilometers. Therefore, it is recommended to choose the wireless transmission method to save the amount of cable materials and the workload of inspection. The above transmission method ensures that the test data is updated in real time, and in the event of leakage, the alarm is timely, which reduces economic losses and environmental pollution.

In an embodiment of the present invention, the controller comprises a PLC controller.

Specifically, the controller includes a communication module 401 , a flow data-driven model 402 , a pressure mechanism model 403 and an alarm control module 404 . The input end of the communication module 401 is respectively connected with the flow meter and the pressure detection meter, and the output end is respectively connected with the establishment of the flow data driving model 402 and the establishment of the pressure mechanism model 403; the establishment of the flow data driving model 402 and the establishment of the pressure mechanism model 403 refer to each other , determine the leakage state of the conveying pipeline; the information on the leakage trend is timely fed back to the alarm control module 404 for alarming.

In the embodiment of the present invention, the back-end monitoring unit includes an image display; wherein, the image display is used to display the operation interface and store data, and perform pop-up window, flashing alarm or sound and light alarm for the data that does not meet the judgment conditions.

In the embodiment of the present invention, the preset algorithm includes judging the detection rate of the front-end detection instruments at the front and rear ends of the entire section of the conveying pipeline from the outlet of the slurry conveying pump at the end to the inlet of the tailings dam recovery tank at the tail. Whether the difference meets the preset range; among them, establish a data-driven model for the measured value of the reserved front-end detection instrument that meets the preset range; alarm the triggering alarm control module that does not meet the preset range; The difference is the difference in monitoring data between the tail and the end.

In an embodiment of the present invention, the method for establishing the data-driven model includes the least squares method.

Specifically, the least squares method is used to establish a flow data-driven model, and then the data-driven model is used to deduce the threshold of the flow alarm, so as to carry out an early warning of leakage alarm.

More specifically, as shown in FIG. 2 , the judging process of the data-driven control model for flow parameters is as follows:

First, obtain the measured value S401A of the outlet flow of the delivery pump of the flowmeter set at the outlet of the slurry delivery pump, the measured value of the intermediate flow of the delivery pipeline of the flowmeter in the middle of the delivery pipeline A401B, and the tailings dam of the flowmeter of the inlet pipeline of the tailings dam recovery tank Inlet pipeline flow measured value A401C.

Next, upload the measured value to the controller, and judge whether the difference △F1 between the measured value of the outlet flow of the delivery pump S401A and the measured value of the intermediate flow of the delivery pipeline A401B is within the allowable range; judge whether the measured value of the intermediate flow of the delivery pipeline A401B and the end Whether the difference △F2 between the measured value A401C of the flow rate at the inlet of the mine dam is within the allowable range; judge whether the difference △F3 between the measured value A401C of the flow rate at the entrance of the tailings dam and the measured value of the outlet flow of the transfer pump S401A is within the allowable range When the difference between each group of data is greater than the normal loss flow, jump to the alarm control module S404, when the flow parameters of each group are normal, the detection system will store the above values, and keep the measured values of each flow and record, as The calculation of the difference range in the subsequent controller provides correction data, and for the storage time, the periodic deletion function can be set.

Finally, build a traffic data-driven model.

In an embodiment of the present invention, the alarm control module includes a single-parameter alarm and a dual-parameter alarm; wherein, the single-parameter alarm is an alarm for abnormal flow data or pressure data; the dual-parameter alarm is flow data and pressure data abnormal alarms occur.

Specifically, in the actual operation process, in order to avoid false alarms or false alarms in the monitoring system, two alarm modes are set in the alarm control module, which are divided into alarms for flow data and alarms for pressure data.

More specifically, in order to prevent false alarms of leakage, the detection system designed in the present invention monitors the pipeline pressure at the same time, and establishes a pressure mechanism model of the outlet of the slurry conveying pump. As shown in Figure 3, the judgment process of the data-driven control model for pressure parameters is as follows:

First, set the constant value parameters for the delivery pump, and establish the outlet pressure mechanism model.

Next, the pressure alarm threshold P1 at the outlet of the delivery pump, the pressure alarm threshold P2 at the middle, and the pressure alarm threshold P3 at the inlet of the tailings dam are obtained.

Finally, in the controller, the pressure alarm threshold P1 at the outlet of the transfer pump, the pressure alarm threshold P2 at the middle, and the pressure alarm threshold P3 at the inlet of the tailings dam are compared with the measured values at the corresponding positions. The measured value of the pressure at the outlet of the delivery pump S401a, the measured value of the pressure at the middle of the delivery pipeline S401b, and the measured pressure of the tailings dam inlet pipeline S401c are obtained respectively, and the measured value that meets the requirements is circulated to the controller for normal operation. Return, store, and wear the next sampling value. At the same time, according to the pressure alarm threshold at the outlet of the slurry pump, the length of the conveying pipeline and the flow of the slurry, the pressure value at the intermediate preset position and the pressure alarm at the inlet pipeline of the tailings dam are deduced. The threshold value is compared and judged with the measured value. The measured value that does not meet the requirements triggers the alarm control module, and the step jumps to S404.

In the embodiment of the present invention, the single-parameter alarm includes pop-up and flickering of picture parameters on the image display; the dual-parameter alarm includes pop-up and flickering of picture parameters and sound and light alarms. By increasing the number of alarms, the way of alarming is also more effective.

Specifically, in the alarm control module of the detection system, when only the flow data alarms, the pressure data is normal or the pulp flow is normal, or when only the pressure data alarms, the module control module only issues an alarm, If there is no action, the picture parameters on the LED touch screen of the image display will pop up and flash to remind the indicator staff. When the flow data and pressure data exceed the threshold and an alarm occurs, the detection system will issue an audible and visual alarm to remind the indicator staff to confirm the alarm prompt, and then turn off the pulp conveying pump to stop the pulp conveying. Then, according to the information on the image display, the location of the leakage of the pipeline is determined, and the maintenance personnel carry out the maintenance of the pipeline in time to reduce the overall operation of the mine due to the leakage of the pipeline.

FIG. 4 shows a schematic diagram of a specific embodiment of a tailings buried pipeline leak detection system according to the present invention.

As shown in FIG. 4 , the leakage detection system of the tailings buried transportation pipeline of the present invention includes a slurry transportation pump 1, a tailings dam recovery pool 9, a transportation pipeline 2 connecting the slurry transportation pump 1 and the tailings dam recovery pool 9, and a set of The flow meter and pressure detection gauge on the conveying pipeline 2.

In the embodiment of the present invention, a slurry transport pump 1 is set at the mouth of the tailings transport pipeline, and then, a set of pressure and flow detection groups are respectively set at the outlet of the slurry transport pump and the recovery inlet of the tailings dam, which are used to measure pressure parameters and flow rates. parameter detection. A plurality of pressure and flow monitoring groups are set in the middle of the conveying pipeline, and the specific number is set according to the length of the conveying pipeline 2 . Finally, the tailings dam recovery pond 9 and the end of the conveying pipeline 2 are connected. It constitutes a leak detection system for the entire tailings buried transportation pipeline, and timely alarms the leakage of the transportation pipeline 2.

Utilizing the above-mentioned leakage detection system for tailings buried transportation pipeline according to the present invention has at least the following advantages:

1. In the tailings buried transportation pipeline leakage detection system of the present invention, the transportation pipeline adopts a multi-point and multi-parameter method to detect the slurry leakage, that is, the false alarm rate of a single detection instrument is reduced, and the leakage point is accurately located. It greatly saves the amount of manual inspection and pipeline excavation.

2. The leakage detection system of the tailings buried transportation pipeline of the present invention reduces the parameter detection that only depends on the outlet of the delivery pump and the inlet of the tailings dam by adding detection points at the bends or bends where leakage is likely to occur on the transportation pipeline. The hysteresis improves the leakage alarm rate.

3. The leakage detection system of the tailings buried transportation pipeline of the present invention reduces the search leakage radius in the transportation pipeline through the comparison of multi-point parameters; at the same time, the detection of the two main parameters of the pipeline, flow and pressure, further reduces the single detection. The false alarm rate and missed alarm rate have realized the process automation of the tailings dam transportation pipeline, the online automatic early warning and control of slurry leakage, and the early warning and accurate positioning of the location where leakage may occur, reducing labor costs, and through the combination of human and machine. , to ensure the normal operation of the pipeline.

The tailings buried transmission pipeline leak detection system according to the present invention is described above by way of example with reference to FIGS. 1 , 2 , 3 and 4 . However, those skilled in the art should understand that various improvements can also be made to the leak detection system for the buried tailings transportation pipeline proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.

Claims (9)

1. a tailings buried conveying pipeline leak detection system, is characterized in that, comprises front-end detection instrument, back-end monitoring unit and controller; Wherein, The front-end detection instrument is arranged at a preset position of the conveying pipeline, and is used to detect the data of the preset position; The controller is connected to the front-end detection instrument and the back-end monitoring unit; it is used to receive data detected by the front-end detection instrument, and to calculate and analyze the data through a preset algorithm inside the controller ,judge; The back-end monitoring unit is configured to give an alarm to the data that does not meet the judgment condition, so as to ensure the normal transportation of the conveying pipeline. 2. The tailings buried conveying pipeline leak detection system as claimed in claim 1, characterized in that, The front-end detection instrument includes a flow meter and a pressure detection meter; wherein, The flowmeter includes the outlet flowmeter of the slurry conveying pump, the flowmeter in the middle of the conveying pipeline and the inlet pipeline flowmeter of the tailings dam recovery pool; The pressure detection gauge includes a pressure detection gauge at the outlet of the slurry conveying pump, a pressure detection gauge in the middle of the conveying pipeline, and a pressure detection gauge at the inlet pipeline of the tailings dam recovery pool. 3. The tailings buried conveying pipeline leak detection system as claimed in claim 2, characterized in that, The quantity of the flow meter in the middle of the delivery pipeline and the pressure detection gauge in the middle of the delivery pipeline is at least two. 4. The tailings buried conveying pipeline leak detection system according to claim 2, characterized in that, The transmission modes of the detection data of the flow meter and the pressure detection meter include wireless transmission and wired transmission. 5. The tailings buried conveying pipeline leak detection system according to claim 1, characterized in that, The controller includes a PLC controller. 6. The tailings buried transportation pipeline leak detection system according to claim 1, characterized in that, The back-end monitoring unit includes an image display; wherein, The image display is used for displaying the operation interface and storing the data, and performing a pop-up window, flashing alarm or sound and light alarm for the data that does not meet the judgment condition. 7. The tailings buried transportation pipeline leak detection system according to claim 1, characterized in that, The preset algorithm includes judging the difference between the front-end detection instruments at the front and rear ends of the entire section of the conveying pipeline from the outlet of the slurry conveying pump at the end to the inlet of the tailings dam recovery tank at the tail. Whether the preset range is met; among them, Establishing a data-driven model for the measured value of the front-end detection instrument that meets the preset range and is retained; alarm for the triggering alarm control module that does not meet the preset range; The difference is a detected data difference between the tail and the end. 8. The tailings buried transportation pipeline leak detection system according to claim 7, characterized in that, The alarm control module includes a single-parameter alarm and a dual-parameter alarm; wherein, The single-parameter alarm is an alarm that any one of the flow data or the pressure data is abnormal; The two-parameter alarm is an alarm that both the flow data and the pressure data are abnormal. 9. The tailings buried transportation pipeline leak detection system according to claim 8, characterized in that, The single-parameter alarm includes pop-up and flickering of the picture parameters on the image display; The dual-parameter alarm includes pop-up and flashing of the picture parameter and sound and light alarm.

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