Filling slurry flow state judgment and pipeline conveying pressure loss measurement system

Abstract

The invention discloses a filling slurry flow state judgment and pipeline conveying pressure loss measurement system, and relates to the technical field of green mining. A stirring machine is installed in the stirring pool, the stirring pool is connected to the flow stabilizing pool through a pipeline, a signal enhancer adding device is arranged in the flow stabilizing pool, a bottom outlet of the flow stabilizing pool is connected to the slurry circulating pool, the side edge of the flow stabilizing pool is connected with a testing pipeline section and connected to the slurry circulating pool through the testing pipeline section, and pressure measuring pipes are installed at the two ends of the testing pipeline section. A measuring valve is mounted on a pipeline from the test pipeline section to the slurry circulating pool; the slurry circulating pool is connected to the stirring pool through a power pump, and the system further comprises a signal transmitting and receiving device for transmitting a signal and receiving a reflected signal of the test pipeline section. According to the method, the filling slurry flow state is judged to obtain the slurry experience Reiusu number, meanwhile, the pipeline conveying pressure loss of the filling slurry can be accurately measured, the measurement result provides a test basis for the design of a filling pipe network, and the application prospect is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of green mining, and in particular to a system for determining the flow state of filling slurry and measuring the pressure loss of pipeline transportation. Background Art

[0002] The backfill mining method can effectively manage underground goafs and improve ore recovery while reducing the accumulation of solid waste on the ground. It is an important means to achieve rich gold mining and green mining. However, since the filling slurry is transported from the surface to the goaf through pipelines, the flow state of the filling slurry in the pipeline and the pressure loss of the transportation are crucial to the safe and stable operation of the filling system. Since the filling slurry contains a large amount of solid particles, the accuracy of using the empirical Reynolds number (2300) of single-phase fluid to judge the flow state of the filling slurry is no longer able to meet engineering requirements. Therefore, measuring the flow state of the filling slurry in the pipeline, deriving the empirical Reynolds number for judging the flow state of the filling slurry, and accurately estimating the pressure loss of the filling slurry in the transportation pipeline are one of the main difficulties faced in the development of the backfill mining method. Based on this, it is particularly necessary to develop a system for determining the flow state of the filling slurry and measuring the pressure loss of the pipeline transportation. Summary of the Invention

[0003] In view of the deficiencies in the existing technology, the purpose of the present invention is to provide a system for determining the flow state of filling slurry and measuring the pressure loss of pipeline transportation. While judging the flow state of the filling slurry to obtain the slurry empirical Reynolds number, the system can also measure the pipeline transportation pressure loss of the filling slurry. The measurement results provide a test basis for the design of the filling pipe network and are easy to promote and use.

[0004] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a filling slurry flow state determination and pipeline transportation pressure loss measurement system, including a stirring tank, a stirrer, a stabilizing tank, a signal enhancer adding device, a slurry circulation tank, a test pipeline section, a pressure measuring tube, a flow valve, a power pump and a signal transmitter and receiver, a stirrer is installed in the stirring tank, the stirring tank is connected to the stabilizing tank through a pipeline, a signal enhancer adding device is placed in the stabilizing tank, the bottom outlet of the stabilizing tank is connected to the slurry circulation tank, the side of the stabilizing tank is connected to the test pipeline section, which is connected to the slurry circulation tank through the test pipeline section, pressure measuring tubes are installed at both ends of the test pipeline section, and a flow valve for controlling the flow rate of the filling slurry is installed on the pipeline from the test pipeline section to the slurry circulation tank; the slurry circulation tank is connected to the stirring tank through a power pump, and the system also includes a signal transmitter and receiver that transmits signals and receives reflected signals from the test pipeline section.

[0005] Preferably, the signal enhancer in the signal enhancer adding device is preferably, but not limited to, nano-Fe3O4 solution.

[0006] Preferably, the test pipe section adopts a transparent organic glass tube with a diameter of 80-150 mm; the pressure measuring tubes at both ends of the test pipe section can be replaced with pressure sensors, and the delivery pressure at both ends of the test pipe section is measured by the pressure measuring tubes or pressure sensors.

[0007] Preferably, the power pump is a slurry pump, and the filling slurry is stored and reused through a slurry circulation pool and the slurry pump.

[0008] Preferably, the signal transmitter and receiver preferably adopt but are not limited to phased array radar; the signal transmitter and receiver and the signal enhancer in the signal enhancer adding device constitute a data analysis system, and the flow state inside the filling slurry is judged by the distribution of the strength of the signals received by the signal transmitter and receiver. The flow state determination of the filling slurry includes the following steps: when the filling slurry is in a stable state in the test pipe section after several cycles in the pipeline, the signal transmitter and receiver are turned on, and the return signal received by the signal transmitter and receiver at this time is used as the base signal; after determining the base signal, the signal enhancer adding device is turned on to allow the signal enhancer to enter the test pipe section along the central axis of the test pipe, and the return signal received by the signal transmitter and receiver after adding the signal enhancer is used as the test signal, and the strength distribution of the test signal and the base signal is compared: if the strong reflection signal is a horizontal straight line, the filling slurry is in a laminar state at this time; if the strong reflection signal is distributed throughout the rectified test pipe position, the filling slurry is in a turbulent state at this time.

[0009] The beneficial effects of the present invention are as follows: while judging the flow state of the filling slurry and obtaining the empirical Reno number of the slurry, the system can also accurately measure the pipeline transportation pressure loss of the filling slurry. The measurement results can provide an experimental basis for the design of the filling pipe network and the calculation of the flow state and transportation pressure loss of the filling slurry in the pipe network, meeting engineering needs and having broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0011] Figure 1 It is a structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0012] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0013] Reference Figure 1, this specific embodiment adopts the following technical solutions: a filling slurry flow state judgment and pipeline transportation pressure loss measurement system, including a stirring tank 1, a stirrer 2, a stabilizing tank 3, a signal enhancer adding device 4, a slurry circulation tank 5, a test pipeline section 6, a pressure measuring tube 7, a flow valve 8, a power pump 9 and a signal transmitter and receiver 10, a stirrer 2 is installed in the stirring tank 1, the stirring tank 1 is connected to the stabilizing tank 3 through a pipeline, a signal enhancer adding device 4 is placed in the stabilizing tank 3, and the bottom outlet of the stabilizing tank 3 is connected to the slurry circulation tank 5. The side of the ring pool 5 and the stabilizing pool 3 is connected to the test pipe section 6. The stabilizing pool 3 is used to maintain a constant flow rate of the filling slurry in the test pipe section 6. It is connected to the slurry circulation pool 5 through the test pipe section 6. Pressure measuring tubes 7 are installed at both ends of the test pipe section 6. A flow valve 8 for controlling the flow rate of the filling slurry is installed on the pipeline from the test pipe section 6 to the slurry circulation pool 5; the slurry circulation pool 5 is connected to the stirring pool 1 through a power pump 9. The system also includes a signal transmitter and receiver 10 that transmits signals and receives reflected signals from the test pipe section.

[0014] It is worth noting that the signal enhancer in the signal enhancer adding device 4 is preferably but not limited to nano Fe3O4 solution.

[0015] It is worth noting that the test pipe section 6 is made of a transparent organic glass tube with a diameter of 80-150 mm; the pressure measuring tubes 7 at both ends of the test pipe section 6 can be replaced with pressure sensors.

[0016] It is worth noting that the power pump 9 is a slurry pump, and the filling slurry is stored and reused through a slurry circulation system composed of a slurry circulation tank 5 and a slurry pump.

[0017] In addition, the signal transmitter and receiver 10 preferably adopts but is not limited to phased array radar.

[0018] In this specific embodiment, the size and height of the stirring tank 1 can be optimally designed according to needs, and the stirrer 2 in the stirring tank 1 can be a stirrer with a storage function; the stabilizing tank 3 can ensure that the flow rate in the test pipe section 6 is at a constant size when the flow valve 8 remains constant, and the lower outlet of the stabilizing tank 3 is connected to the slurry circulation tank 5 to reuse the slurry; the right side of the stabilizing tank 3 is connected to the test pipe section 6, and the delivery pressure at both ends of the test pipe section 6 is measured by a pressure measuring tube 7 or a pressure sensor; the flow rate of the slurry filled in the test pipe section 6 is adjusted and controlled by the flow valve 8 between the test pipe section 6 and the slurry circulation tank 5.

[0019] In this specific embodiment, the signal transmitter and receiver 10 and the signal enhancer in the signal enhancer adding device 4 constitute a data analysis system, which judges the flow state inside the filling slurry by the distribution of the strength of the signal received by the signal transmitter and receiver 10. The flow state determination of the filling slurry includes the following steps: when the filling slurry is in a stable state in the test pipe section 6 after several cycles in the pipeline, the signal transmitter and receiver 10 is turned on, and the return signal received by the signal transmitter and receiver 10 at this time is used as the base signal; after determining the base signal, the signal enhancer adding device 4 is turned on to allow the signal enhancer to enter the test pipe section 6 along the central axis of the test pipe, and the return signal received by the signal transmitter and receiver 10 after adding the signal enhancer is used as the test signal, and the strength distribution of the test signal and the base signal is compared: if the strong reflection signal is a horizontal straight line, the filling slurry is in a laminar state at this time; if the strong reflection signal covers the entire test pipe position, the filling slurry is in a turbulent state at this time.

[0020] This specific embodiment uses a signal receiver and transmitter 10 as the core device for determining the flow state of the pipeline to judge the flow state of the filling slurry in the pipeline, and uses a pressure measuring tube 7 as a tool for testing the pipeline transmission pressure loss. Its specific working principle is: the filling slurry is prepared in the stirring tank 1, and the prepared slurry passes through the pipeline to the stabilizing tank 3, and then reaches the test pipeline section 6 and merges with the signal enhancer of the signal enhancer adding device 4 in the stabilizing tank 3. The flow state of the filling slurry in the test section is judged by the reflection signal range of the signal enhancer in the test pipeline. ; The filling slurry flows through the test pipeline section 6 and then enters the slurry circulation tank 5. The flow rate of the filling slurry in the test pipeline section 6 is controlled by the flow valve 8 between the test pipeline section and the slurry circulation tank 5. The empirical Reynolds number of the filling slurry is determined by replacing the pipelines of different diameters in the test pipeline section, regulating the flow rate in the pipeline by the flow valve and replacing the filling slurry for the test. The conveying pressure loss of the filling slurry in the pipeline under different flow states is calculated by reading the reading of the pressure measuring tube 7; the filling slurry is sent to the stirring tank 1 through the power pump 9 in the slurry circulation tank 5, thereby forming a loop.

[0021] This specific implementation method can determine the slurry experience Lei No. while judging the flow state of the filling slurry and obtaining the slurry experience Lei No., and can accurately measure the pipeline transportation pressure loss of the filling slurry. The measurement results can provide an experimental basis for the design of the filling pipe network and the calculation of the flow state and transportation pressure loss of the filling slurry in the pipe network, meet engineering needs, and have broad market application prospects.

[0022] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for determining the flow state of filling slurry and measuring the pressure loss of pipeline transportation, characterized in that: The invention comprises a stirring tank (1), a stirrer (2), a flow stabilizing tank (3), a signal enhancer adding device (4), a slurry circulation tank (5), a test pipe section (6), a pressure measuring tube (7), a flow valve (8), a power pump (9) and a signal transmitter and receiver (10), wherein the stirring tank (1) is provided with a stirrer (2), the stirring tank (1) is connected to the flow stabilizing tank (3) through a pipeline, the signal enhancer adding device (4) is placed in the flow stabilizing tank (3), the bottom outlet of the flow stabilizing tank (3) is connected to the slurry circulation tank (5), and the flow stabilizing tank (3) is connected to the slurry circulation tank (5). The side of the flow pool (3) is connected to a test pipe section (6), which is connected to a slurry circulation pool (5) through the test pipe section (6). Pressure measuring tubes (7) are installed at both ends of the test pipe section (6). A flow valve (8) for controlling the flow rate of the filling slurry is installed on the pipeline from the test pipe section (6) to the slurry circulation pool (5); the slurry circulation pool (5) is connected to the stirring pool (1) through a power pump (9). The system also includes a signal transmitter and receiver (10) for transmitting signals and receiving reflected signals from the test pipe section.

2. A filling slurry flow state determination and pipeline transportation pressure loss measurement system according to claim 1, characterized in that: The signal enhancer in the signal enhancer adding device (4) is a nano Fe3O4 solution.

3. A filling slurry flow state determination and pipeline transportation pressure loss measurement system according to claim 1, characterized in that: The test pipe section (6) is made of a transparent organic glass tube with a diameter of 80-150 mm.

4. A filling slurry flow state determination and pipeline transportation pressure loss measurement system according to claim 1, characterized in that: The pressure measuring tube (7) can be replaced by a pressure sensor, and the delivery pressure at both ends of the test pipe section (6) is measured by the pressure measuring tube (7) or the pressure sensor.

5. A filling slurry flow state determination and pipeline transportation pressure loss measurement system according to claim 1, characterized in that: The power pump (9) is a slurry pump.

6. A filling slurry flow state determination and pipeline transportation pressure loss measurement system according to claim 1, characterized in that: The signal transmitter and receiver (10) adopts a phased-control radar.

7. A filling slurry flow state determination and pipeline transportation pressure loss measurement system according to claim 1, characterized in that: The signal transmitter and receiver (10) and the signal enhancer in the signal enhancer adding device (4) form a data analysis system. The flow state inside the filling slurry is judged by the distribution of the strength of the signal received by the signal transmitter and receiver (10). The filling slurry flow state judgment includes the following steps: when the filling slurry is in a stable state in the test pipe section (6) after several cycles in the pipeline, the signal transmitter and receiver (10) is turned on, and the return signal received by the signal transmitter and receiver (10) at this time is used as the base signal; after determining the base signal, the signal enhancer adding device (4) is turned on, so that the signal enhancer enters the test pipe section (6) along the central axis of the test pipe, and the return signal received by the signal transmitter and receiver (10) after adding the signal enhancer is used as the test signal, and the strength distribution of the test signal and the base signal are compared: if the strong reflection signal is a horizontal straight line, the filling slurry is in a laminar state at this time; if the strong reflection signal covers the entire test pipe position, the filling slurry is in a turbulent state at this time.

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