Device for detecting flowing property of filling slurry

Abstract

The utility model relates to a filling slurry flowing property detection device, and belongs to the technical field of mineral engineering. The device comprises an operation platform, a slump cone, a hydraulic tamping rod, a stand column, a funnel, two horizontal cross rods, a longitudinal lifting rod and a transverse supporting rod, wherein a laser range finder is fixedly arranged in the middle of the bottom end of the transverse supporting rod; an annular supporting rod is horizontally arranged between the two stand columns in a sliding mode, two infrared cameras are symmetrically arranged on the annular supporting rod in a sliding mode, the laser range finder and the infrared cameras are connected with a data acquisition instrument through data lines, and the data acquisition instrument is externally connected with a computer. According to the device, a cone shape formed after filling slurry flows stably in a filling slurry flowing property detection experiment can be accurately shot through the infrared camera, the slump height of the filling slurry can be accurately measured through the laser range finder, and the slump and the expansion of the filling slurry can be calculated through a conventional slump and expansion calculation formula. The flowing property detection of the filling slurry is realized.

Description

Technical Field

[0001] The utility model relates to a filling slurry flowability detection device, belonging to the technical field of mining engineering. Background Art

[0002] Backfill mining method is widely used in the field of underground metal mining. Underground mine backfilling can not only effectively dispose of solid waste tailings on a large scale, but also improve the mining environment, control surface subsidence, and increase the recovery rate. It has become one of the important technical approaches for green, safe and efficient mining of metal mines.

[0003] Usually, tailings, cement and water are used to prepare the filling slurry. The tailings paste filling slurry needs to be transported to the deep underground stope over a long distance. Its good fluidity is a very critical process parameter indicator for the smooth progress of the filling operation. When the slurry concentration is too low and its fluidity is too large, it is easy to cause slurry bleeding, stratification and segregation, which will greatly increase the risk of wear and even blockage of the filling pipeline. If the slurry concentration is too high and its fluidity is too small, it cannot meet the requirements of normal transportation of the slurry from the surface to the underground stope. Therefore, ensuring that the fluidity of the tailings paste filling slurry is within a reasonable range is a necessary condition for the efficient implementation of the filling mining method. The flowability of the filling slurry can indicate the smoothness of the flow of the filling slurry under its own weight or external force, and the difficulty of using the filling slurry to fill the stope. The flowability of the filling slurry is a very important characteristic for evaluating whether the filling slurry can be transported through a pipeline. The parameters for evaluating the flowability of the filling slurry mainly include slump, expansion, etc.

[0004] There are no unified methods for measuring the fluidity of tailings paste filling slurry. One is to use a rheometer to measure shear stress and shear rate to characterize the rheological parameters of the slurry; the other is to use slump and expansion tests for evaluation. At present, the rheological parameters of filling slurry are mainly tested by rheometer, which has poor engineering applicability. The latter is more consistent with the actual flow state of materials in engineering, but the traditional experimental method will produce relatively complex operation, high risk, long research cycle, high cost, and errors in manual operation can easily lead to test failure.

[0005] However, the slump and expansion of the existing filling slurry rely on manual operation, and it is difficult to lift the slump cone upward at a uniform speed. The height of the cone formed after the filling slurry flows steadily cannot be accurately measured, and the area of ​​the bottom of the cone cannot be accurately measured. As a result, the slump and expansion of the filling slurry flow performance are inaccurately measured, and the filling slurry flow performance cannot be accurately evaluated. Utility Model Content

[0006] In view of the problem that the slump and spread of the existing filling slurry flow properties are inaccurately measured and the measurement error is large, resulting in the inability to accurately evaluate the flow properties of the filling slurry, the utility model proposes a filling slurry flow performance detection device, which uses an infrared camera to accurately capture the cone shape formed after the filling slurry flows steadily in the filling slurry flow performance detection experiment, and uses a laser rangefinder to accurately measure the slump height of the filling slurry. The slump and spread of the filling slurry are calculated using conventional slump and spread calculation formulas, thereby realizing the filling slurry flow performance detection.

[0007] A filling slurry flow performance detection device, comprising an operating platform 1, a slump cone 2 and a hydraulic tamping rod 13, the slump cone 2 is arranged at the center of the operating platform 1, two columns 3 are fixedly arranged on the operating platform 1 and the two columns 3 are symmetrical with respect to the slump cone 2, a funnel 7 is arranged at the top of the slump cone 2, two symmetrical horizontal cross bars 4 are fixedly arranged on the top outer wall of the slump cone 2, longitudinal lifting rods 14 are fixedly arranged on the two horizontal cross bars 4, transverse support rods 9 are fixedly arranged on the tops of the two columns 3, and the tops of the longitudinal lifting rods 14 are fixedly arranged on the transverse support rods 9, the top end of the longitudinal lifting rod 14 is the power end, and the bottom end of the longitudinal lifting rod 14 is the working end; a telescopic hydraulic tamping rod 13 is provided in the middle of the transverse support rod 9, and the bottom end of the hydraulic tamping rod 13 extends downward to the bottom of the slump cone 2, and a laser rangefinder 6 is provided in the middle of the bottom end of the transverse support rod 9; an annular support rod 12 is slidably provided between the two columns 3, and two infrared cameras 11 are symmetrically slidably provided on the annular support rod 12, and the laser rangefinder 6 and the infrared camera 11 are connected to the data acquisition instrument 17 through a data line 16, and the data acquisition instrument 17 is externally connected to a computer 18.

[0008] The longitudinal lifting rod can realize longitudinal extension and retraction at a uniform and stable speed, so that the slump cone can be lifted vertically, stably and at a uniform speed, avoiding experimental errors caused by unstable speed of manually lifting the slump cone;

[0009] Preferably, the two horizontal cross bars 4 are both provided with handles 5 , and the bottom ends of the longitudinal lifting rods 14 are fixedly connected to the handles 5 .

[0010] Preferably, a circular electric slide rail Ⅰ15 is fixedly provided on the central bottom surface of the transverse support rod 9, and the top end of the hydraulic tamping rod 13 is arranged on the electric slide rail Ⅰ15; the electric slide rail Ⅰ15 can drive the hydraulic tamping rod 13 to rotate at a constant speed;

[0011] Preferably, the two columns 3 are fixedly provided with a vertical electric slide rail II 19, the electric slide rail II 19 is slidably provided with a slider I8, the annular support rod 12 is composed of an identical semicircular support rod I and a semicircular support rod II, both ends of the semicircular support rod I and the semicircular support rod II are respectively fixedly provided on the slider I8 of the two columns 3, an arc-shaped electric slide rail III 20 is provided along the arc on the semicircular support rod I, an arc-shaped electric slide rail IV 21 is provided along the arc on the semicircular support rod II, both the electric slide rail III 20 and the electric slide rail IV 21 are provided with a slider III 10, and two infrared cameras 11 are respectively fixedly provided on the slider III 10 of the electric slide rail III 20 and the electric slide rail IV 21.

[0012] The electric slide rail II 19 can realize the up and down movement of the annular support rod 12 at a uniform and stable speed; the electric slide rail IV 21 can synchronously drive two infrared cameras to slide at a uniform speed along the semicircular support rod I and the semicircular support rod II respectively in the same direction.

[0013] Preferably, a cross line marking the center position is engraved on the upper surface of the operating platform 1 .

[0014] In the filling slurry flowability test experiment, the slump cone 2 can be a conical slump cone with an upper inner diameter of 100 mm, a lower inner diameter of 200 mm, and a height of 300 mm. Two symmetrical horizontal cross bars 4 are fixedly provided on the top outer wall (2 / 3 of the height) of the slump cone 2.

[0015] The method for using the filling slurry flowability detection device comprises the following specific steps:

[0016] 1) Install the funnel on the top of the slump cone, place the slump cone in the center of the operating platform, fix the working end of the longitudinal lifting rod on the horizontal cross bar, extend the telescopic tamping rod of the hydraulic tamping rod downward to the bottom of the slump cone, and slide the annular support rod above the slump cone;

[0017] 2) Prepare filling slurries with different concentrations and different lime-sand ratios;

[0018] 3) Pour a slightly excessive amount of the filler slurry to be tested evenly into the slump cone, and at the same time, use the hydraulic tamping rod to tamp in the spiral direction to evenly distribute the filler slurry to be tested and fill the entire slump cone. After tamping, hydraulically retract the telescopic tamping rod, remove the funnel and smooth the filler slurry to be tested at the mouth of the slump cone; turn on the laser rangefinder to measure the distance d1 from the top surface of the filler slurry to the measuring point of the laser rangefinder, and the data acquisition instrument collects the distance h1 measured by the laser rangefinder and transmits it to the computer for storage;

[0019] 4) Slump measurement: lift the slump cone vertically and steadily at a uniform speed through the longitudinal lifting rod until the slump cone completely leaves the backfill slurry to be tested. When the backfill slurry to be tested stops collapsing or the slump time is more than 30 seconds, turn on the laser rangefinder to measure the distance h2 from the vertex of the cone shape formed after the backfill slurry flows steadily to the measuring point of the laser rangefinder. The data acquisition instrument collects the distance h2 measured by the laser rangefinder and transmits it to the computer for storage; the slump of the backfill slurry is calculated by the formula h3=h2-h1;

[0020] 5) Expansion measurement: During the experiment of measuring the slump of the filling slurry to be tested, the filling slurry to be tested collapses downward and forms an expansion surface in the horizontal direction. When the filling slurry to be tested no longer expands or the expansion time reaches more than 50s, the annular support rod slides down along the column to the middle position of the cone shape formed after the filling slurry flows steadily. Two infrared cameras symmetrically arranged on the annular support rod slide and rotate synchronously in the same direction along the annular support rod, with each rotation angle of 1.8°, for a total of 100 measurement points; at each measurement point, the diameter of the cone shape formed after the filling slurry flows steadily is measured and transmitted to the computer, and 100 diameters of the cone formed after the filling slurry flows steadily are obtained, namely d1, d2, d3, ..., d 100 ;

[0021] 6) Expansion calculation: Take the average value of the diameters measured at 100 measurement points as the filling slurry expansion, and calculate the filling slurry expansion by the formula The expansion degree of the filling slurry is calculated; the flow properties of the filling slurry can be analyzed through the slump of the filling slurry and the expansion degree of the filling slurry.

[0022] The beneficial effects of the utility model are:

[0023] (1) The detection device of the utility model has a simple structure and is easy to operate. It can avoid the experimental error caused by manually pulling the slump cone. At the same time, it is not necessary to observe the ruler with the naked eye to obtain the measurement result. The distance measurement using the laser rangefinder is not prone to errors and the number of measurement points is large, so the slump measurement accuracy is high.

[0024] (2) The utility model uses an infrared camera to accurately capture the diameter of the cone shape formed after the filling slurry flows steadily in the filling slurry flow performance test experiment, takes the average value of the diameters measured at 100 measurement points as the filling slurry expansion, and calculates it through the formula The expansion degree of the filling slurry can be calculated, and the measurement accuracy of the expansion degree is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of the filling slurry flowability testing device;

[0026] Figure 2 It is a top view of a device for testing the flow properties of filling slurry;

[0027] In the figure, 1-operating platform, 2-slump cone, 3-column, 4-horizontal crossbar, 5-handle, 6-laser rangefinder, 7-funnel, 8-slider I, 9-lateral support rod, 10-slider III, 11-infrared camera, 12-annular support rod, 13-hydraulic tamping rod, 14-longitudinal lifting rod, 15-electric slide rail I, 16-data cable, 17-data acquisition instrument, 18-computer, 19-electric slide rail II, 20-electric slide rail III, 21-electric slide rail IV. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with specific implementation methods, but the protection scope of the present invention is not limited to the described contents.

[0029] Embodiment 1: A filling slurry flow performance detection device (see Figure 1 and 2 ), comprising an operating platform 1, a slump cone 2 and a hydraulic tamping rod 13, the slump cone 2 being arranged at the center of the operating platform 1, two columns 3 being fixedly arranged on the operating platform 1 and the two columns 3 being symmetrical with respect to the slump cone 2, a funnel 7 being arranged at the top of the slump cone 2, two symmetrical horizontal cross bars 4 being fixedly arranged on the top outer wall of the slump cone 2, longitudinal lifting rods 14 being fixedly arranged on the two horizontal cross bars 4, transverse supporting rods 9 being fixedly arranged on the tops of the two columns 3, the tops of the longitudinal lifting rods 14 being fixedly arranged on the transverse supporting rods 9, the longitudinal lifting rods 14 being fixedly arranged on the transverse supporting rods 9, and the longitudinal lifting rods 14 being fixedly arranged on the transverse supporting rods 9. The top end of the vertical lifting rod 14 is the power end, and the bottom end of the longitudinal lifting rod 14 is the working end; a telescopic hydraulic tamping rod 13 is provided in the middle of the horizontal support rod 9, and the bottom end of the hydraulic tamping rod 13 extends downward to the bottom of the slump cone 2, and a laser rangefinder 6 is provided in the middle of the bottom end of the horizontal support rod 9; an annular support rod 12 is provided between the two columns 3, and two infrared cameras 11 are symmetrically slidably provided on the annular support rod 12, and the laser rangefinder 6 and the infrared camera 11 are connected to the data acquisition instrument 17 through a data line 16, and the data acquisition instrument 17 is externally connected to a computer 18;

[0030] The two horizontal cross bars 4 are both provided with handles 5, and the bottom ends of the longitudinal lifting rods 14 are fixedly connected to the handles 5;

[0031] The method for using the filling slurry flowability detection device comprises the following specific steps:

[0032] 1) Install the funnel on the top of the slump cone, place the slump cone in the center of the operating platform, fix the working end of the longitudinal lifting rod on the horizontal cross bar, extend the telescopic tamping rod of the hydraulic tamping rod downward to the bottom of the slump cone, and slide the annular support rod above the slump cone;

[0033] 2) Prepare filling slurries with different concentrations and different lime-sand ratios: The lime-sand ratio of the experimental filling slurry can be set to 1:4, 1:6, 1:8, 1:10, and 1:20, and the mass concentration range of the filling slurry is set to 72-80%, and it is increased by 2% gradient, for a total of 25 groups of experiments. According to the concentration and lime-sand ratio, the corresponding tailings amount, cement amount, and water amount are calculated and weighed to prepare the filling slurry;

[0034] 3) Pour a slightly excessive amount of the filler slurry to be tested evenly into the slump cone, and at the same time, use the hydraulic tamping rod to tamp in the spiral direction to evenly distribute the filler slurry to be tested and fill the entire slump cone. After tamping, hydraulically retract the telescopic tamping rod, remove the funnel and smooth the filler slurry to be tested at the mouth of the slump cone; turn on the laser rangefinder to measure the distance h1 from the top surface of the filler slurry to the measuring point of the laser rangefinder, and the data acquisition instrument collects the distance h1 measured by the laser rangefinder and transmits it to the computer for storage;

[0035] 4) Slump measurement: lift the slump cone vertically and steadily at a uniform speed through the longitudinal lifting rod until the slump cone completely leaves the backfill slurry to be tested. When the backfill slurry to be tested stops collapsing or the slump time is more than 30 seconds, turn on the laser rangefinder to measure the distance h2 from the vertex of the cone shape formed after the backfill slurry flows steadily to the measuring point of the laser rangefinder. The data acquisition instrument collects the distance h2 measured by the laser rangefinder and transmits it to the computer for storage; the slump of the backfill slurry is calculated by the formula h3=h2-h1;

[0036] 5) Expansion measurement: During the experiment of measuring the slump of the filling slurry to be tested, the filling slurry to be tested collapses downward and forms an expansion surface in the horizontal direction. When the filling slurry to be tested no longer expands or the expansion time reaches more than 50s, the annular support rod slides downward along the column to the middle position of the cone shape formed after the filling slurry flows steadily. Two infrared cameras symmetrically arranged on the annular support rod slide and rotate synchronously in the same direction along the annular support rod, with each rotation angle of 1.8°, for a total of 100 measurement points; at each measurement point, the diameter of the cone shape formed after the filling slurry flows steadily is measured and transmitted to the computer, and 100 diameters of the cone formed after the filling slurry flows steadily are obtained, namely d1, d2, d3, ..., d 100 ;

[0037] 6) Expansion calculation: Take the average value of the diameters measured at 100 measurement points as the filling slurry expansion, and calculate the filling slurry expansion by the formula The expansion degree of the filling slurry is calculated; the flow properties of the filling slurry can be analyzed through the slump of the filling slurry and the expansion degree of the filling slurry.

[0038] Embodiment 2: The filling slurry flowability detection device of this embodiment has a substantially similar structure to the filling slurry flowability detection device of Embodiment 2, except that: a circular electric slide rail Ⅰ15 is fixedly provided on the central bottom surface of the transverse support rod 9, and the top end of the hydraulic tamping rod 13 is slidably provided on the electric slide rail Ⅰ15; the electric slide rail Ⅰ15 can drive the hydraulic tamping rod 13 to rotate at a uniform speed, and the hydraulic tamping rod rotates at a uniform speed along the electric slide rail Ⅰ to tamp the filling body slurry so that the filling body slurry to be tested is evenly distributed and fills the entire slump cone;

[0039] The two columns 3 are both fixedly provided with a vertical electric slide rail Ⅱ19, on which a slider Ⅱ8 is slidably provided, the annular support rod 12 is composed of an identical semicircular support rod Ⅰ and a semicircular support rod Ⅱ, both ends of the semicircular support rod Ⅰ and the semicircular support rod Ⅱ are respectively fixedly provided on the slider Ⅱ8 of the two columns 3, an arc-shaped electric slide rail Ⅲ20 is provided along the arc on the semicircular support rod Ⅰ, an arc-shaped electric slide rail Ⅳ21 is provided along the arc on the semicircular support rod Ⅱ, and sliders Ⅲ10 are slidably provided on the electric slide rails Ⅲ20 and Ⅳ21, and two infrared cameras 11 are respectively fixedly provided on the sliders Ⅲ10 of the electric slide rails Ⅲ20 and Ⅳ21; the electric slide rail Ⅱ19 can realize the up and down movement of the annular support rod 12 at a uniform and stable speed; the electric slide rail Ⅳ21 can synchronously drive the two infrared cameras to slide at a uniform speed along the semicircular support rod Ⅰ and the semicircular support rod Ⅱ in the same direction.

[0040] Embodiment 3: The structure of the filling slurry flowability detection device of this embodiment is basically the same as that of the filling slurry flowability detection device of embodiment 2, except that:

[0041] The upper surface of the operating platform 1 is engraved with a cross line marking the center position; the cross line facilitates the slump cone to be placed at the center of the operating platform.

[0042] The specific implementation modes of the present invention are described in detail above, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A filling slurry flow performance detection device, characterized in that: The invention comprises an operating platform (1), a slump cone (2) and a hydraulic tamping rod (13). The slump cone (2) is arranged at the center of the operating platform (1). Two columns (3) are fixedly arranged on the operating platform (1) and the two columns (3) are symmetrical with respect to the slump cone (2). A funnel (7) is arranged at the top of the slump cone (2). Two symmetrical horizontal cross bars (4) are fixedly arranged on the top outer wall of the slump cone (2). The two horizontal cross bars (4) are fixedly arranged with longitudinal lifting rods (14). The tops of the two columns (3) are fixedly arranged with transverse supporting rods (9). The tops of the longitudinal lifting rods (14) are fixedly arranged on the transverse supporting rods (9). The top end of the lateral lifting rod (14) is a power end, and the bottom end of the longitudinal lifting rod (14) is a working end; a telescopic hydraulic tamping rod (13) is arranged in the middle of the transverse support rod (9), and the bottom end of the hydraulic tamping rod (13) extends downward to the bottom of the slump cone (2); a laser rangefinder (6) is arranged in the middle of the bottom end of the transverse support rod (9); an annular support rod (12) is arranged between the two columns (3), and two infrared cameras (11) are symmetrically slidably arranged on the annular support rod (12), and the laser rangefinder (6) and the infrared camera (11) are connected to a data acquisition instrument (17) through a data line (16), and the data acquisition instrument (17) is externally connected to a computer (18).

2. The filling slurry flowability detection device according to claim 1, characterized in that: The two horizontal cross bars (4) are both provided with handles (5), and the bottom ends of the longitudinal lifting rods (14) are fixedly connected to the handles (5).

3. The filling slurry flowability detection device according to claim 1, characterized in that: A circular electric slide rail I (15) is fixedly arranged on the central bottom surface of the transverse support rod (9), and the top end of the hydraulic tamping rod (13) is slidably arranged on the electric slide rail I (15).

4. The filling slurry flowability detection device according to claim 1, characterized in that: A vertical electric slide rail II (19) is fixedly arranged on the two columns (3), a slider I (8) is slidably arranged on the electric slide rail II (19), an annular support rod (12) is composed of an identical semicircular support rod I and a semicircular support rod II, both ends of the semicircular support rod I and the semicircular support rod II are respectively fixedly arranged on the slider I (8) of the two columns (3), an arc-shaped electric slide rail III (20) is arranged along the arc of the semicircular support rod I, an arc-shaped electric slide rail IV (21) is arranged along the arc of the semicircular support rod II, a slider III (10) is arranged on the electric slide rail III (20) and the electric slide rail IV (21), and two infrared cameras (11) are respectively fixedly arranged on the sliders III of the electric slide rail III (20) and the electric slide rail IV (21).

5. The filling slurry flowability detection device according to claim 1, characterized in that: The upper surface of the operating platform (1) is engraved with a cross line marking the center position.

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