Ore pulp pipeline concentration and uniformity automatic detection device and method

Abstract

The invention discloses a device and a method for automatically detecting the concentration and uniformity of an ore pulp pipeline. The device comprises a sampling assembly, a concentration testing assembly and a flushing assembly, the concentration testing assembly comprises an upper-layer sampling bottle, a middle-layer sampling bottle, a lower-layer sampling bottle and a waste sample bottle which are respectively connected with the sampling assembly through slurry outlet pipes; the flushing assembly is used for flushing the sampling assembly and the concentration testing assembly; the sampling assembly comprises a sampler shell, a sampling rod outer barrel and a sampling rod inner barrel, the sampling rod outer barrel and the sampling rod inner barrel are arranged on the sampler shell, a pulp inlet and a pulp outlet are formed in the sampling rod inner barrel, and an ore pulp conveying channel is arranged between the pulp inlet and the pulp outlet; the sampler shell is sleeved on the sampling rod inner cylinder and moves along the axial direction of the sampling rod inner cylinder, the sampling rod inner cylinder moves along the axial direction in the sampler shell, fixed-volume sampling is respectively carried out on the upper layer, the middle layer and the lower layer in an ore pulp pipeline, then the mass is respectively weighed, weighted averaging is carried out to obtain the accurate concentration of ore pulp in the pipeline, and the uniformity of the ore pulp in the pipeline is synchronously judged.

Description

Technical Field

[0001] The present invention belongs to the technical field of slurry concentration detection, and more specifically, relates to a device and method for automatically detecting slurry pipeline concentration and uniformity. Background Art

[0002] As the core data in the production and operation of slurry pipelines, the slurry weight concentration and uniformity index have an important impact on the normal operation of pipelines and the detection of product quality. Therefore, accurately obtaining the slurry weight concentration and uniformity index in the operating pipeline is an important condition to ensure the safe and economical operation of the slurry pipeline. The main testing methods for slurry weight concentration and uniformity index in slurry pipelines are on-site sampling valve sampling and nuclear concentration detection. However, during the operation of the slurry pipeline, sorting occurs between solid particles and slurry, and the slurry concentration in the pipeline is unevenly distributed, resulting in the slurry released by the sampling valve being unrepresentative. In addition, the sampling valve is mostly manually sampled, which is labor-intensive and has a long detection cycle, and it is impossible to detect the slurry concentration in the pipeline in real time. Nuclear concentration detection is not only affected by factors such as insufficient flow and bubbles in the pipe, which affects the accuracy of the test results, but also cannot determine the vertical distribution characteristics of the slurry in the pipeline.

[0003] At present, a detection system is disclosed on the market, including: a sample preparation module for preparing solid ore pulp samples, including a mixing container, and a guide component for introducing liquid ore pulp and curing agent into the mixing container, and a curing mold for receiving the mixed fluid and curing to obtain a solid ore pulp sample; a LIBS detection module for laser detection of the sample and analyzing the sample to obtain the element concentration composition. The system forms a microscopic three-dimensional cross-linked network structure by mixing liquid ore pulp with a curing agent, so that the mineral solid particles in the ore pulp liquid are bound in place to form a non-Newtonian fluid, avoiding the precipitation of solid particles in the sample, and making the sample solidify quickly.

[0004] It avoids the adverse effects of unstable liquid level and absorption of large amounts of laser energy on detection, and makes the sample dispersed evenly, greatly improving the measurement accuracy. However, this detection system has no effective measures to overcome the influence of factors such as solid-liquid separation, insufficient flow in the pipe, and bubbles in the pipeline. It also has a low degree of automation, a long detection cycle, and cannot determine the vertical gradient distribution of the slurry in the pipeline. In addition, there are often radioactive sources in nuclear concentration detection, and strict safety protection requirements. Therefore, there is a need for an automatic detection device and method for slurry pipeline concentration and uniformity to optimize the detection results, avoid the influence of the solid-liquid seal layer in the pipeline, and make the detected data more accurate. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an automatic detection device and method for the concentration and uniformity of a slurry pipeline. The sampling component is used to perform fixed-volume sampling in the upper, middle and lower layers of the slurry pipeline respectively, and then the masses of the slurry samples in the three layers are weighed respectively. The accurate concentration of the slurry in the pipeline is obtained by weighted average, and the uniformity of the slurry in the pipeline is simultaneously judged, thereby providing guidance for scientifically adjusting the operating frequency of the slurry pump so that the slurry running speed reaches the optimal value under the premise of safety. The method effectively solves the problem of real-time detection and adjustment of the concentration and uniformity of the slurry pipeline, avoids the generation of silt in the pipeline, prevents the occurrence of pipeline blockage accidents, and ensures the safe operation of the slurry pipeline.

[0006] To achieve the above objectives, according to a first aspect of an embodiment of the present invention, there is provided a device for automatically detecting concentration and uniformity of a slurry pipeline, comprising a sampling component, a concentration testing component and a flushing component;

[0007] The concentration test assembly includes an upper sampling bottle, a middle sampling bottle, a lower sampling bottle and a waste sample bottle, which are respectively connected to the sampling assembly through a slurry outlet pipe;

[0008] The flushing component is used to flush the sampling component and the concentration testing component;

[0009] The sampling assembly comprises a sampler housing, a sampling rod outer tube and a sampling rod inner tube arranged on the sampler housing, a slurry inlet and a slurry outlet are arranged on the sampling rod inner tube, and a slurry conveying channel is arranged between the slurry inlet and the slurry outlet;

[0010] The sampler shell is sleeved on the sampling rod inner tube and moves along its axial direction. The sampling rod inner tube moves axially in the sampler shell, and fixed volume sampling is performed on the upper, middle and lower three layers in the slurry pipeline respectively. The masses of the slurry samples in the three layers are weighed respectively, and the accurate concentration of the slurry in the pipeline is obtained by weighted average, and the uniformity of the slurry in the pipeline is judged simultaneously.

[0011] Furthermore, a third leak-proof pad is provided at the top of the inner tube of the sampling rod;

[0012] The diameter of the third leak-proof pad is larger than the diameter of the inner tube of the sampling rod. When the outer tube of the sampling rod moves to be flush with the end of the inner tube of the sampling rod, the third leak-proof pad seals the connection between the ends of the two to prevent the slurry from flowing out of the gap between the two.

[0013] One end of the sampler housing is fixed on the slurry pipeline and communicated with the slurry pipeline, and the other end is provided with a limiting structure.

[0014] Furthermore, the sampling assembly also includes an actuator;

[0015] The actuator comprises an actuator housing and an electric slide rail. The actuator housing is arranged at one end of the sampler housing close to the limiting structure, and the electric slide rail is arranged inside the actuator housing.

[0016] Furthermore, the bottom end of the outer cylinder of the sampling rod is provided with an outer cylinder connecting piece, and the bottom end of the inner cylinder of the sampling rod is provided with an inner cylinder connecting piece;

[0017] After the sampling rod outer cylinder and the sampling rod inner cylinder pass through the limiting structure on the sampler housing, they are fixed on the electric slide rail through the outer cylinder connecting piece and the inner cylinder connecting piece respectively;

[0018] The electric slide rail controls the positions of the outer tube and the inner tube of the sampling rod, so that the two extend into different positions in the slurry pipeline, thereby achieving sampling of different levels of the slurry.

[0019] Furthermore, feed valves are provided on the connecting pipes between the bottle openings of the upper sampling bottle, the middle sampling bottle, the lower sampling bottle and the waste sample bottle and the slurry outlet pipe, and the flow direction of the slurry is controlled by the feed valves;

[0020] The bottoms of the four bottles are also provided with waste pipes, and each waste pipe is provided with a waste valve for controlling the outflow of the slurry in each bottle;

[0021] The bottoms of the upper sampling bottle, the middle sampling bottle and the lower sampling bottle are also provided with mass sensors for measuring the mass of the slurry therein;

[0022] Agitators are also arranged in the upper sampling bottle, the middle sampling bottle and the lower sampling bottle.

[0023] Furthermore, the flushing assembly includes a flushing pipe, a flushing valve and a leak-proof cap;

[0024] One end of the flushing pipe is connected to the sampler housing, and a flushing valve is provided on the flushing pipe to control the entry of flushing water;

[0025] One end of the flushing pipe close to the sampler housing is also provided with a leak-proof cap. When the inner cylinder of the sampling rod moves to the lowest point, the leak-proof cap is butted against the slurry inlet.

[0026] According to another aspect of an embodiment of the present invention, a method for automatically detecting concentration and uniformity of a slurry pipeline is provided, comprising the following steps:

[0027] S100, using the sampling component to respectively sample the upper, middle and lower three layers of slurry in the slurry pipeline with a fixed volume, and transporting the sampled sample to the concentration testing component;

[0028] S200, weighing the three obtained slurry samples respectively, and calculating the weight concentration and uniformity index of the slurry in the tube according to the volume and weight of each sample;

[0029] S300, checking the obtained uniformity index, and adjusting the frequency of the slurry delivery pump according to the obtained uniformity index, so that the uniformity index is maintained within a constant range;

[0030] S400, the sampling assembly is reset, the waste valves of all sampling bottles are opened, the slurry therein is drained, and the flushing assembly is connected to clean water to clean the sampling assembly and the concentration test assembly.

[0031] Furthermore, step S100 specifically includes the following steps:

[0032] S110, start the electric slide rail to drive the outer tube of the sampling rod and the inner tube of the sampling rod to move synchronously in the direction close to the slurry pipeline until the bottom of the slurry inlet is 0.92D away from the inner bottom of the slurry pipeline, the inner tube of the sampling rod stops moving, the electric slide rail drives the outer tube of the sampling rod to move downward until the slurry inlet is completely leaked, open the feed valve of the waste sample bottle, and the slurry flows into the waste sample bottle under the action of pressure. After the slurry flowing into the waste sample bottle reaches 500ml, close the feed valve, open the feed valve of the upper sampling bottle, and the slurry flows into the upper sampling bottle. After sampling is completed, the electric slide rail drives the outer tube of the sampling rod to move until it is flush with the top of the inner tube of the sampling rod;

[0033] S120, start the electric slide rail to drive the outer tube of the sampling rod and the inner tube of the sampling rod to move synchronously away from the slurry pipe until the bottom of the slurry inlet is 0.5D away from the inner bottom of the slurry pipe, the inner tube of the sampling rod stops moving, the electric slide rail drives the outer tube of the sampling rod to move downward until the slurry inlet is completely leaked, open the feed valve of the waste sample bottle, and the slurry flows into the waste sample bottle under the action of pressure. After the slurry flowing into the waste sample bottle reaches 500ml, close the feed valve, open the feed valve of the middle-layer sampling bottle, and the slurry flows into the middle-layer sampling bottle. After sampling is completed, the electric slide rail drives the outer tube of the sampling rod to move until it is flush with the top of the inner tube of the sampling rod;

[0034] S130, start the electric slide rail to drive the outer tube of the sampling rod and the inner tube of the sampling rod to move synchronously away from the slurry pipe until the bottom of the slurry inlet is 0.02D away from the inner bottom of the slurry pipe, the inner tube of the sampling rod stops moving, the electric slide rail drives the outer tube of the sampling rod to move downward until the slurry inlet is completely leaked, open the feed valve of the waste sample bottle, and the slurry flows into the waste sample bottle under the action of pressure. After the slurry flowing into the waste sample bottle reaches 500ml, close the feed valve, open the feed valve of the lower sampling bottle, and the slurry flows into the lower sampling bottle. After sampling is completed, the electric slide rail drives the outer tube of the sampling rod to move flush with the top of the inner tube of the sampling rod, and close all valves;

[0035] Where D is the inner diameter of the slurry pipeline.

[0036] Furthermore, in step S200, the weight concentration C of the upper slurry in the slurry pipeline is W Above:

[0037]

[0038] Weight concentration of middle layer pulp C W In:

[0039]

[0040] Weight concentration of the lower slurry C W Below is:

[0041]

[0042] Where ρ is the density of the ore in the slurry, in kg / m 3 ,

[0043] m 上 is the mass change in the upper sampling bottle, in g,

[0044] m 中 is the mass change in the middle sampling bottle, in g,

[0045] m 下 is the mass change in the lower sampling bottle, in g,

[0046] V 上 is the volume of slurry in the upper sampling bottle, in ml,

[0047] V 中 is the volume of slurry in the middle sampling bottle, in ml,

[0048] V 下 is the volume of slurry in the lower sampling bottle, in ml;

[0049] Get the actual weight concentration C of the slurry in the slurry pipeline W for:

[0050]

[0051] Where α is the temperature correction coefficient.

[0052] Further, in step S300, in the slurry pipeline, the uniformity index K of the slurry is:

[0053]

[0054] The frequency of the slurry pump is adjusted according to the obtained uniformity index, specifically: if K < 0.8, the control component automatically controls the frequency of the slurry pump to increase; if K > 0.8, the control component automatically controls the frequency of the slurry pump to decrease, so that the uniformity index K of the slurry is stabilized at 0.8.

[0055] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0056] 1. The detection device of the present invention performs fixed-volume sampling in the upper, middle and lower layers of the slurry pipeline through a sampling component, and then weighs the masses of the slurry samples in the three layers respectively, obtains the accurate concentration of the slurry in the pipeline by weighted average, and simultaneously judges the uniformity of the slurry in the pipeline, thereby providing guidance for scientifically adjusting the operating frequency of the slurry pump, so that the slurry running speed reaches the optimal value under the premise of safety, effectively solving the problem of real-time detection and adjustment of the concentration and uniformity of the slurry pipeline, avoiding the generation of silt in the pipeline, preventing the occurrence of pipeline blockage accidents, and ensuring the safe operation of the slurry pipeline.

[0057] 2. The detection device of the present invention is provided with a waste sample bottle. Each time sampling is performed, the first slurry obtained is first placed in the waste sample bottle to ensure that there is no slurry from other layers in the path of the slurry flow, thereby avoiding the impurity of the slurry taken in the three-layer sampling, which leads to deviations in the detection results and ensures the accuracy of the detection results.

[0058] 3. In the detection device of the present invention, the actions of all structures are automatically controlled by the control component. It is considered that interference only requires the input of corresponding parameters, which makes the control of the detection process more precise. At the same time, it liberates manual labor, effectively improves the integration and automation of the measuring device, thereby simplifying the operation process and improving measurement efficiency.

[0059] 4. The detection device of the present invention is provided with a flushing component, and each sampling bottle is provided with an agitator. After the test is completed, the sampling bottle is cleaned to prepare for the next test, thereby ensuring the accuracy of each test result.

[0060] 5. The detection device of the present invention can realize the dynamic detection function of the concentration gradient distribution of the slurry pipeline, which can prevent pipeline blockage and realize safe transportation; it can also ensure that the operating speed is the optimal value to achieve the purpose of energy saving and emission reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 This is a schematic diagram of the structure of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0062] Figure 2 This is a schematic diagram of the structure of a sampling component of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0063] Figure 3 This is a schematic diagram of the structure of a sampler housing of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0064] Figure 4 This is a schematic diagram of the structure of a sampling rod outer tube and a sampling rod inner tube of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0065] Figure 5 This is a schematic diagram of the structure of an actuator of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0066] Figure 6 This is a schematic diagram of the structure of a concentration test component of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0067] Figure 7 This is a schematic diagram of the structure of a flushing component of an automatic detection device for concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0068] Figure 8 A schematic diagram of a flow chart of a method for automatically detecting concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0069] Fig. 9 This is a schematic diagram of a specific process of step S100 in a method for automatically detecting concentration and uniformity of a slurry pipeline according to an embodiment of the present invention;

[0070] Fig.10 The figure is a schematic diagram of a specific flow of step S400 in a method for automatically detecting concentration and uniformity of a slurry pipeline according to an embodiment of the present invention.

[0071] In all the drawings, the same figure marks represent the same technical features, specifically: 1-sampling assembly, 11-sampler housing, 111-first leak-proof pad, 112-second leak-proof pad, 12-sampling rod outer tube, 121-outer tube connecting piece, 13-sampling rod inner tube, 131-inner tube connecting piece, 132-slurry outlet, 133-third leak-proof pad, 134-slurry inlet, 14-actuator, 141-actuator housing, 142-electric slide rail, 2-concentration test assembly, 21-slurry outlet pipe, 22-flow meter, 23-upper layer sampling bottle, 24-middle layer sampling bottle, 25-lower layer sampling bottle, 26-waste sample bottle, 3-flushing assembly, 31-flushing pipe, 32-flushing valve, 33-leak-proof cap, 4-control assembly, 41-remote control mechanism, 42-on-site control mechanism. DETAILED DESCRIPTION

[0072] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain 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 can be combined with each other as long as they do not conflict with each other.

[0073] Example 1

[0074] The embodiment of the present invention provides an automatic detection device for the concentration and uniformity of a slurry pipeline, comprising a sampling component 1, a concentration test component 2, a flushing component 3 and a control component 4. The sampling component 1 comprises a sampling rod outer tube 12 and a sampling rod inner tube 13, a notch is provided at the top of the sampling rod inner tube 13, the sampling rod outer tube 12 is sleeved on the sampling rod inner tube 13, and the notch is moved on the sampling rod inner tube 13 to cover or leak out of the notch thereon for controlling the sampling of the slurry in the slurry pipeline. The sampling component 1 performs fixed volume sampling on the upper, middle and lower layers of the slurry pipeline respectively, and then the slurry samples of the three layers are weighed respectively, and the accurate concentration of the slurry in the pipeline is obtained by weighted average, and the uniformity of the slurry in the pipeline is judged simultaneously, so as to provide guidance for scientifically adjusting the operating frequency of the slurry pump, so that the slurry running speed reaches the optimal value under the premise of safety, effectively solves the problem of real-time detection and adjustment of the concentration and uniformity of the slurry pipeline, avoids the generation of sediment in the pipeline, prevents the occurrence of pipeline blockage accidents, and ensures the safe operation of the slurry pipeline.

[0075] A slurry conveying channel is provided inside the top of the sampling rod inner tube 13. A lateral notch is provided on the sampling rod inner tube 13, so that one end of the slurry conveying channel is connected to the external environment as a slurry inlet 134. A slurry outlet 132 is also provided at the other end of the slurry conveying channel, so that the slurry conveying channel is connected to the slurry pipeline and the sampling assembly 1. The sampling rod outer tube 12 is a hollow sleeve, and its inner diameter is the same as the outer diameter of the sampling rod inner tube 13. It is sleeved on the sampling rod inner tube 13 and moves axially on the surface of the sampling rod inner tube 13. A third leak-proof pad 133 is also provided at the top of the sampling rod inner tube 13. The diameter of the third leak-proof pad 133 is larger than the diameter of the sampling rod inner tube 13. When the sampling rod outer tube 12 moves to be flush with the end of the sampling rod inner tube 13, the third leak-proof pad 133 seals the connection between the two ends to prevent the slurry from flowing out of the gap between the two.

[0076] The sampling assembly 1 also includes a sampler housing 11 and an actuator 14. One end of the sampler housing 11 is fixed to the slurry pipeline and communicates with the slurry pipeline, and the other end is provided with a limit structure. The actuator 14 includes an actuator housing 141 and an electric slide rail 142. The actuator housing 141 is provided at one end of the sampler housing 11 close to the limit structure, and the electric slide rail 142 is provided inside the actuator housing 141.

[0077] The bottom end of the sampling rod outer cylinder 12 is provided with an outer cylinder connector 121, and the bottom end of the sampling rod inner cylinder 13 is provided with an inner cylinder connector 131. After the sampling rod outer cylinder 12 and the sampling rod inner cylinder 13 pass through the limiting structure on the sampler housing 11, they are fixed on the electric slide rail 142 respectively through the outer cylinder connector 121 and the inner cylinder connector 131. The positions of the sampling rod outer cylinder 12 and the sampling rod inner cylinder 13 are controlled by the electric slide rail 142, so that the two extend into different positions in the slurry pipeline, so as to realize sampling of different levels of the slurry.

[0078] The two ends of the sampler housing 11 are also provided with a first leak-proof pad 111 and a second leak-proof pad 112. The centers of the first leak-proof pad 111 and the second leak-proof pad 112 are both provided with openings. The sampling rod outer tube 12 and the sampling rod inner tube 13 pass through the central openings of the two leak-proof pads to achieve sealing between the two and the sampler housing 11, thereby preventing leakage after the sampling rod inner tube 13 introduces the slurry into the sampler housing 11.

[0079] When in use, the electric slide rail 142 drives the sampling rod outer tube 12 and the sampling rod inner tube 13 to move synchronously into the slurry pipeline, and then the electric slide rail 142 drives the sampling rod outer tube 12 to move toward the bottom end of the sampling rod inner tube 13, so that the slurry inlet 134 at the top of the sampling rod inner tube 13 leaks out, and the slurry in the slurry pipeline enters through the slurry inlet 134 under the action of pressure, and is drained through the slurry conveying channel to flow out at the slurry outlet 132.

[0080] The concentration test assembly 2 includes a slurry discharge pipe 21, a flow meter 22, an upper sampling bottle 23, a middle sampling bottle 24, a lower sampling bottle 25 and a waste sample bottle 26. One end of the slurry discharge pipe 21 is connected to the sampler housing 11, and the other end is connected to the bottle mouths of the upper sampling bottle 23, the middle sampling bottle 24, the lower sampling bottle 25 and the waste sample bottle 26. The flow meter 22 is arranged on the slurry discharge pipe 21 to monitor the volume of the slurry flowing therethrough. A feed valve is arranged on the connecting pipe of the bottle mouth of the upper sampling bottle 23, the middle sampling bottle 24, the lower sampling bottle 25 and the waste sample bottle 26 and the slurry discharge pipe 21, and the flow direction of the slurry is controlled by the feed valve; the bottom of the four bottles is also provided with a waste pipe, and each waste pipe is provided with a waste valve to control the outflow of the slurry in each bottle. The upper sampling bottle 23, the middle sampling bottle 24 and the lower sampling bottle 25 are provided with a mass sensor at the bottom thereof for measuring the mass of the slurry therein. The upper sampling bottle 23, the middle sampling bottle 24 and the lower sampling bottle 25 are also provided with a stirrer.

[0081] When in use, the slurry in the sampler housing 11 flows from the slurry outlet pipe 21 into the upper sampling bottle 23, the middle sampling bottle 24, the lower sampling bottle 25 or the waste sample bottle 26 to test the slurry. After the test is completed, the waste valve is opened to drain the slurry in all the bottles.

[0082] The bottoms of the upper sampling bottle 23, the middle sampling bottle 24, the lower sampling bottle 25 and the waste sample bottle 26 are hemispherical and conical flow-gathering structures, through which the slurry is gathered at the bottom of the bottle, making it easier for the slurry in the bottle to flow out through the waste pipe.

[0083] The flushing assembly 3 includes a flushing pipe 31, a flushing valve 32 and a leak-proof cap 33. One end of the flushing pipe 31 is connected to the sampler housing 11, and a flushing valve 32 is provided thereon to control the entry of flushing water. The end of the flushing pipe 31 close to the sampler housing 11 is also provided with a leak-proof cap 33. When the sampling rod inner tube 13 moves to the lowest point, the leak-proof cap 33 docks with the slurry inlet 134.

[0084] After the test is completed, the inner tube 13 of the sampling rod is moved to the lowest point, and the flushing valve 32 is opened to allow clean water to enter the sampler housing 11 through the flushing pipe 31 to clean the sampling component 1, and then enter the concentration test component 2 to clean it. When cleaning the upper sampling bottle 23, the middle sampling bottle 24 and the lower sampling bottle 25, the stirrer therein is started to clean the upper sampling bottle 23, the middle sampling bottle 24 and the lower sampling bottle 25 to prevent affecting the next test result.

[0085] The control component 4 is provided with an automatic control program, including a remote control mechanism 41 and an on-site control mechanism 42, both of which are connected to the sampling component 1, the concentration test component 2 and the flushing component 3 signals, and are also connected to the slurry pump signal in the slurry pipeline. The remote control mechanism 41 is used to remotely control the automatic control program, and the on-site control mechanism 42 is used to control the automatic control program on-site, so as to realize the automatic detection of the concentration and uniformity of the slurry in the slurry pipeline by the system.

[0086] Preferably, the head of the sampling rod inner tube 13 is rotatably connected to control its rotation in the slurry pipe so that the slurry inlet 134 faces different directions, thereby extracting slurry at different cross-sectional positions in the slurry pipe.

[0087] Example 2

[0088] The embodiment of the present invention provides a method for automatically detecting concentration and uniformity of a slurry pipeline, which specifically includes the following steps:

[0089] S100, using the sampling component 1 to respectively sample the upper, middle and lower three layers of slurry in the slurry pipeline with a fixed volume, and transporting the sample to the concentration testing component 2;

[0090] S200, weighing the three obtained slurry samples respectively, and calculating the weight concentration and uniformity index of the slurry in the tube according to the volume and weight of each sample;

[0091] S300, checking the obtained uniformity index, and adjusting the frequency of the slurry delivery pump according to the obtained uniformity index, so that the uniformity index is maintained within a constant range;

[0092] S400, the sampling component 1 is reset, the waste valves of all sampling bottles are opened, the slurry therein is drained, and the flushing component 3 is connected with clean water to clean the sampling component 1 and the concentration testing component 2.

[0093] In step S100, the following steps are specifically included:

[0094] S110, start the electric slide 142 to drive the sampling rod outer tube 12 and the sampling rod inner tube 13 to move synchronously in the direction close to the slurry pipeline, until the bottom of the slurry inlet 134 is 0.92D away from the inner bottom of the slurry pipeline, the sampling rod inner tube 13 stops moving, the electric slide 142 drives the sampling rod outer tube 12 to move downward until the slurry inlet 134 completely leaks out, open the feed valve of the waste sample bottle 26, and the slurry flows into the waste sample bottle 26 under the action of pressure. After the slurry flowing into the waste sample bottle 26 reaches 500ml, close the feed valve, open the feed valve of the upper sampling bottle 23, and the slurry flows into the upper sampling bottle 23. After the sampling is completed, the electric slide 142 drives the sampling rod outer tube 12 to move to be flush with the top of the sampling rod inner tube 13;

[0095] S120, start the electric slide 142 to drive the sampling rod outer tube 12 and the sampling rod inner tube 13 to move synchronously away from the slurry pipeline until the bottom of the slurry inlet 134 is 0.5D away from the inner bottom of the slurry pipeline, the sampling rod inner tube 13 stops moving, the electric slide 142 drives the sampling rod outer tube 12 to move downward until the slurry inlet 134 completely leaks out, open the feed valve of the waste sample bottle 26, and the slurry flows into the waste sample bottle 26 under the action of pressure. After the slurry flowing into the waste sample bottle 26 reaches 500ml, close the feed valve, open the feed valve of the middle-layer sampling bottle 24, and the slurry flows into the middle-layer sampling bottle 24. After sampling is completed, the electric slide 142 drives the sampling rod outer tube 12 to move to be flush with the top of the sampling rod inner tube 13;

[0096] S130, start the electric slide 142 to drive the sampling rod outer tube 12 and the sampling rod inner tube 13 to move synchronously in the direction away from the slurry pipeline until the bottom of the slurry inlet 134 is 0.02D away from the inner bottom of the slurry pipeline, the sampling rod inner tube 13 stops moving, the electric slide 142 drives the sampling rod outer tube 12 to move downward until the slurry inlet 134 completely leaks out, open the feed valve of the waste sample bottle 26, and the slurry flows into the waste sample bottle 26 under the action of pressure. After the slurry flowing into the waste sample bottle 26 reaches 500ml, close the feed valve, open the feed valve of the lower sampling bottle 25, and the slurry flows into the lower sampling bottle 25. After sampling is completed, the electric slide 142 drives the sampling rod outer tube 12 to move flush with the top of the sampling rod inner tube 13, and close all valves.

[0097] Where D is the inner diameter of the slurry pipeline.

[0098] In step S200, the weight concentration of the upper slurry in the slurry pipeline is C W上 for:

[0099]

[0100] Weight concentration of middle layer pulp C W中 for:

[0101]

[0102] Weight concentration of the lower slurry C W下 for:

[0103]

[0104] Where ρ is the density of the ore in the slurry, in kg / m 3 ,

[0105] m 上 is the mass change in the upper sampling bottle, in g,

[0106] m 中 is the mass change in the middle sampling bottle, in g,

[0107] m 下 is the mass change in the lower sampling bottle, in g,

[0108] V 上 is the volume of slurry in the upper sampling bottle, in ml,

[0109] V 中 is the volume of slurry in the middle sampling bottle, in ml,

[0110] V 下 It is the volume of slurry in the lower sampling bottle, in ml.

[0111] Get the actual weight concentration C of the slurry in the slurry pipeline W for:

[0112]

[0113] Where α is the temperature correction coefficient.

[0114] In step S300, the uniformity index K of the slurry in the slurry pipeline is:

[0115]

[0116] The frequency of the slurry pump is adjusted according to the obtained uniformity index, specifically: if K < 0.8, the control component 4 automatically controls the frequency of the slurry pump to increase; if K > 0.8, the control component 4 automatically controls the frequency of the slurry pump to decrease, so that the uniformity index K of the slurry is stabilized at 0.8.

[0117] In step S400, the following steps are specifically included:

[0118] S410, after the test is completed, the electric slide rail 142 drives the sampling rod inner tube 13 and the sampling rod outer tube 12 to move downward, reset to the bottom of the slurry pipeline, open the waste valves of all sampling bottles and waste sample bottles 26, and discharge the slurry after the test is completed;

[0119] S420, close all waste valves, move the outer tube 12 of the sampling rod downward to the leakage inlet 134, open all feed valves and flushing valve 32, inject clean water into the sampling bottle and the waste sample bottle 26 through the flushing pipe 31, turn on the agitator, and clean the inner wall of the sampling bottle and the waste sample bottle 26;

[0120] S430, after cleaning is completed, the waste valve is opened to discharge the cleaning waste liquid, all valves are closed, and the sampling rod outer tube 12 moves upward and resets to the top of the slurry inlet 134 of the sampling rod inner tube 13.

[0121] If the device is installed on the iron concentrate pipeline, the density of the iron concentrate is 4766.23kg / m3, the maximum particle size of the slurry is 0.2mm, the pressure of the slurry pipeline is 0.5MPa, and the pipeline diameter is DN250. The slurry concentration and uniformity index in the iron concentrate pipeline are tested according to the above test method. The data are shown in the following table:

[0122]

[0123] When the slurry pipeline pressure is 0.48MPa, the weight concentration of the slurry in the pipe is 59.95% and the uniformity coefficient is 0.8564.

[0124] If the device is installed on the gangue filling pipeline, the gangue density is 2055.1kg / m3, the maximum particle size of the slurry is 3mm, and the pipeline diameter is DN300, the slurry concentration and uniformity index in the gangue filling pipeline under different working conditions are tested according to the above test method. The data are shown in the following table:

[0125]

[0126] When the slurry pipeline pressure is 1MPa, the weight concentration of the slurry in the pipe is 74.06% and the uniformity coefficient is 0.9348.

[0127]

[0128] When the slurry pipeline pressure is 0.9MPa, the weight concentration of the slurry in the pipe is 71.87% and the uniformity coefficient is 0.9132.

[0129] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is 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 protection scope of the present invention.

Claims

1. An automatic detection device for slurry pipeline concentration and uniformity, characterized in that: It comprises a sampling component (1), a concentration testing component (2) and a flushing component (3); The concentration test assembly (2) comprises an upper sampling bottle (23), a middle sampling bottle (24), a lower sampling bottle (25) and a waste sample bottle (26), which are respectively connected to the sampling assembly (1) through a slurry outlet pipe (21); The flushing component (3) is used to flush the sampling component (1) and the concentration testing component (2); The sampling assembly (1) comprises a sampler housing (11), a sampling rod outer tube (12) and a sampling rod inner tube (13) arranged on the sampler housing (11); a slurry inlet (134) and a slurry outlet (132) are arranged on the sampling rod inner tube (13); and a slurry conveying channel is arranged between the slurry inlet (134) and the slurry outlet (132); The sampler housing (11) is sleeved on the sampling rod inner tube (13) and moves along the axial direction thereof. The sampling rod inner tube (13) moves axially in the sampler housing (11), and fixed volume sampling is performed in the upper, middle and lower layers of the slurry pipeline respectively. The slurry samples of the three layers are then weighed respectively, and the accurate concentration of the slurry in the pipeline is obtained by weighted average, and the uniformity of the slurry in the pipeline is simultaneously judged.

2. The automatic detection device for slurry pipeline concentration and uniformity according to claim 1 is characterized in that: A third leak-proof pad (133) is also provided at the top end of the sampling rod inner tube (13); The diameter of the third anti-leakage pad (133) is greater than the diameter of the inner tube (13) of the sampling rod. When the outer tube (12) of the sampling rod moves to be flush with the end of the inner tube (13) of the sampling rod, the third anti-leakage pad (133) seals the connection between the ends of the two to prevent the slurry from flowing out of the gap between the two. One end of the sampler housing (11) is fixed on the ore slurry pipeline and communicated with the ore slurry pipeline, and the other end is provided with a limiting structure.

3. The automatic detection device for slurry pipeline concentration and uniformity according to claim 2 is characterized in that: The sampling assembly (1) further comprises an actuator (14); The actuator (14) comprises an actuator housing (141) and an electric slide rail (142); the actuator housing (141) is arranged at one end of the sampler housing (11) close to the limiting structure; and the electric slide rail (142) is arranged inside the actuator housing (141).

4. The automatic detection device for slurry pipeline concentration and uniformity according to claim 3 is characterized in that: The bottom end of the sampling rod outer cylinder (12) is provided with an outer cylinder connecting piece (121), and the bottom end of the sampling rod inner cylinder (13) is provided with an inner cylinder connecting piece (131); After the sampling rod outer cylinder (12) and the sampling rod inner cylinder (13) pass through the limiting structure on the sampler housing (11), they are fixed on the electric slide rail (142) through the outer cylinder connecting piece (121) and the inner cylinder connecting piece (131) respectively; The positions of the sampling rod outer tube (12) and the sampling rod inner tube (13) are controlled by the electric slide rail (142), so that the two extend into different positions in the ore slurry pipeline, thereby achieving sampling of different levels of the ore slurry.

5. A device for automatically detecting concentration and uniformity of a slurry pipeline according to any one of claims 1 to 4, characterized in that: The connection pipes between the bottle openings of the upper sampling bottle (23), the middle sampling bottle (24), the lower sampling bottle (25) and the waste sample bottle (26) and the slurry outlet pipe (21) are all provided with feed valves, and the flow direction of the slurry is controlled by the feed valves; The bottoms of the upper sampling bottle (23), the middle sampling bottle (24), the lower sampling bottle (25) and the waste sample bottle (26) are also provided with waste pipes, and each waste pipe is provided with a waste valve for controlling the outflow of the slurry in each bottle; The bottoms of the upper sampling bottle (23), the middle sampling bottle (24) and the lower sampling bottle (25) are also provided with mass sensors for measuring the mass of the slurry therein; Agitators are also provided in the upper sampling bottle (23), the middle sampling bottle (24) and the lower sampling bottle (25).

6. An automatic detection device for slurry pipeline concentration and uniformity according to any one of claims 1 to 4, characterized in that: The flushing assembly (3) comprises a flushing pipe (31), a flushing valve (32) and a leak-proof cap (33); One end of the flushing pipe (31) is connected to the sampler housing (11), and a flushing valve (32) is provided on the flushing pipe to control the entry of flushing water; The end of the flushing pipe (31) close to the sampler housing (11) is also provided with a leak-proof cap (33). When the sampling rod inner tube (13) moves to the lowest point, the leak-proof cap (33) is butted against the slurry inlet (134).

7. A method for automatically detecting concentration and uniformity of a slurry pipeline, implemented by using the automatic detection device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S100, using the sampling component (1) to respectively sample the upper, middle and lower three layers of slurry in the slurry pipeline with a fixed volume, and transporting the sampled sample to the concentration testing component (2); S200, weighing the three obtained slurry samples respectively, and calculating the weight concentration and uniformity index of the slurry in the tube according to the volume and weight of each sample; S300, checking the obtained uniformity index, and adjusting the frequency of the slurry delivery pump according to the obtained uniformity index, so that the uniformity index is maintained within a constant range; S400, the sampling assembly (1) is reset, the waste valves of all sampling bottles are opened, the slurry therein is drained, and the flushing assembly (3) is connected to clean water to clean the sampling assembly (1) and the concentration test assembly (2).

8. The method for automatically detecting concentration and uniformity of a slurry pipeline according to claim 7, characterized in that: In step S100, the following steps are specifically included: S110, start the electric slide rail (142) to drive the outer tube (12) and the inner tube (13) of the sampling rod to move synchronously in the direction close to the slurry pipeline until the bottom of the slurry inlet (134) is 0.92D away from the inner bottom of the slurry pipeline, the inner tube (13) of the sampling rod stops moving, the electric slide rail (142) drives the outer tube (12) of the sampling rod to move downward until the slurry inlet (134) completely leaks out, open the feed valve of the waste sample bottle (26), and the slurry flows into the waste sample bottle (26) under the action of pressure. When the slurry flowing into the waste sample bottle (26) reaches 500 ml, close the feed valve, open the feed valve of the upper sampling bottle (23), and the slurry flows into the upper sampling bottle (23). After sampling is completed, the electric slide rail (142) drives the outer tube (12) of the sampling rod to move until it is flush with the top of the inner tube (13) of the sampling rod; S120, start the electric slide rail (142) to drive the outer tube (12) and the inner tube (13) of the sampling rod to move synchronously in a direction away from the slurry pipeline until the bottom of the slurry inlet (134) is 0.5D away from the inner bottom of the slurry pipeline, the inner tube (13) of the sampling rod stops moving, the electric slide rail (142) drives the outer tube (12) of the sampling rod to move downward until the slurry inlet (134) completely leaks out, open the feed valve of the waste sample bottle (26), and the slurry flows into the waste sample bottle (26) under the action of pressure. When the slurry flowing into the waste sample bottle (26) reaches 500 ml, close the feed valve, open the feed valve of the middle sampling bottle (24), and the slurry flows into the middle sampling bottle (24). After sampling is completed, the electric slide rail (142) drives the outer tube (12) of the sampling rod to move until it is flush with the top of the inner tube (13) of the sampling rod; S130, start the electric slide rail (142) to drive the outer tube (12) and the inner tube (13) of the sampling rod to move synchronously in a direction away from the slurry pipeline until the bottom of the slurry inlet (134) is 0.02D away from the inner bottom of the slurry pipeline, the inner tube (13) of the sampling rod stops moving, the electric slide rail (142) drives the outer tube (12) of the sampling rod to move downward until the slurry inlet (134) completely leaks out, open the feed valve of the waste sample bottle (26), and the slurry flows into the waste sample bottle (26) under the action of pressure. When the slurry flowing into the waste sample bottle (26) reaches 500 ml, close the feed valve, open the feed valve of the lower sampling bottle (25), and the slurry flows into the lower sampling bottle (25). After sampling is completed, the electric slide rail (142) drives the outer tube (12) of the sampling rod to move until it is flush with the top of the inner tube (13) of the sampling rod, and close all valves; Where D is the inner diameter of the slurry pipeline.

9. The method for automatically detecting concentration and uniformity of a slurry pipeline according to claim 8, characterized in that: In step S200, the weight concentration of the upper slurry in the slurry pipeline is C W上 for: Weight concentration of middle layer pulp C W中 for: Weight concentration of the lower slurry C W下 for: Where ρ is the density of the ore in the slurry, in kg / m 3 , m 上 is the mass change in the upper sampling bottle, in g, m 中 is the mass change in the middle sampling bottle, in g, m 下 is the mass change in the lower sampling bottle, in g, V 上 is the volume of slurry in the upper sampling bottle, in ml, V 中 is the volume of slurry in the middle sampling bottle, in ml, V 下 is the volume of slurry in the lower sampling bottle, in ml; Get the actual weight concentration C of the slurry in the slurry pipeline W for: Where α is the temperature correction coefficient.

10. The method for automatically detecting concentration and uniformity of a slurry pipeline according to claim 9, characterized in that: In step S300, the uniformity index K of the slurry in the slurry pipeline is: The frequency of the slurry pump is adjusted according to the obtained uniformity index, specifically: if K < 0.8, the control component (4) automatically controls the frequency of the slurry pump to increase; if K > 0.8, the control component (4) automatically controls the frequency of the slurry pump to decrease, so that the uniformity index K of the slurry is stabilized at 0.8.

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