Gangue slurry long-distance conveying washing-free pipeline system and use method

Abstract

The present application relates to a kind of gangue slurry long-distance conveying washing-free pipeline system, including material conveying pipe and material pumping system, and material conveying pipe is communicated with material pumping system, at least one anti-settling pumping mechanism is additionally provided on material conveying pipe, anti-settling pumping mechanism is located between adjacent two material conveying pipes, and adjacent two material conveying pipes are communicated with each other by anti-settling pumping mechanism, anti-settling pumping mechanism includes inner lining pipe, sheath pipe, guide vane, shunt pipe, jet port, booster pump group, multi-way valve and modified pre-reserve slurry.Its use method includes two steps of system layout and material conveying.The present application avoids the phenomenon of blockage due to the need for gangue slurry to stand in pipeline, thereby simplifying filling process, improving filling efficiency, avoiding the problem of pipe blockage caused by filling pause process.

Description

TECHNICAL FIELD

[0001] The present application relates to a gangue slurry long-distance conveying no-washing pipeline system and a use method, and belongs to the technical field of filling operation. BACKGROUND

[0002] At present, when gangue slurry is filled in a goaf, the gangue is first crushed to a certain particle size range, cement and other cementitious materials are added, and the gangue is mixed with mine water or tap water to form a slurry with a certain mass concentration, and then the slurry is conveyed to the filling area through a slurry conveying system. However, with the increase of the mining depth of the mine, the filling pipeline becomes longer and longer. However, long-distance gangue slurry conveying is prone to pipe blockage problems, especially in the case of filling interruption, stagnation, equipment maintenance, filling process adjustment and other situations that require temporary filling, the gangue slurry is prone to sedimentation and segregation when it stays in the pipeline for more than 4 hours, which leads to pipe blockage. In view of the pipe blockage problem, the pipeline is currently cleaned in time to avoid pipe blockage problems. However, when the conveying distance exceeds 5 km, the cleaning of the pipeline is labor-intensive and the cleaning process is complex, a large amount of water is required, the water used for cleaning the pipeline is discharged to the underground mine, and then pumped back to the ground for reuse. Moreover, the original short-distance gangue slurry conveying technology and gangue slurry proportioning cannot meet the requirements of long-distance gangue slurry conveying.

[0003] Based on the above engineering problems, the present application provides a gangue slurry long-distance conveying no-washing pipeline technology. This technology does not require cleaning of the filling pipeline, greatly simplifies the cleaning process of the filling pipeline, effectively avoids pipe blockage problems, meets the requirements of long-distance gangue slurry conveying, reduces the workload of pipeline cleaning, and provides technical support for realizing long-distance stable gangue slurry conveying. SUMMARY

[0004] In order to solve the problems in the prior art, the present application provides a gangue slurry long-distance conveying no-washing pipeline system and method. The present application optimally configures a pure gangue slurry with the advantages of small sedimentation, low segregation rate and weak consolidation, which effectively meets the requirements of material conveying after standing in the material conveying pipeline for 72 hours, avoids the blockage phenomenon caused by the need for gangue slurry to stand in the pipeline for 72 hours, and thus meets the requirements of filling system regular maintenance, interruption, stagnation, filling process adjustment and other situations that require temporary filling without the need for cleaning the pipeline. The present application effectively realizes the purpose of long-distance gangue slurry conveying without washing, simplifies the filling process, improves the filling efficiency, and avoids the pipe blockage problem caused by the filling pause process.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] The gangue slurry long-distance conveying washing-free pipeline system comprises a material conveying pipe and a material pumping system, and the material conveying pipe is communicated with the material pumping system, at least one anti-settling pumping mechanism is arranged on the material conveying pipe, the anti-settling pumping mechanism is located between two adjacent material conveying pipes, and the two adjacent material conveying pipes are communicated with each other through the anti-settling pumping mechanism, the anti-settling pumping mechanism comprises an inner lining pipe, a sheath pipe, a guide plate, a shunt pipe, a jet port, a booster pump group, a multi-way valve and modified reserved slurry, the rear end surface of the inner lining pipe is communicated with the material conveying pipe located on the side close to the material pumping system through a flange and is coaxially distributed, and the front end surface of the inner lining pipe is embedded in the material conveying pipe located away from the material pumping system, and the outer diameter of the front end surface of the inner lining pipe is not greater than 80% of the inner diameter of the material conveying pipe, the sheath pipe is wrapped outside the inner lining pipe and is coaxially distributed with the inner lining pipe, the rear end surface of the sheath pipe is connected with the rear end surface of the inner lining pipe, and the front end surface is communicated with the material conveying pipe located away from the material pumping system through a connecting flange, the inner side surface of the sheath pipe is connected with the inner lining pipe through a plurality of guide plates, the guide plates are uniformly distributed around the axis of the inner lining pipe, the guide plate surface forms an angle of 15°-60° with the axis of the sheath pipe, the front half of the guide plate is located in the material conveying pipe away from the material pumping system together with the front half of the inner lining pipe, and the upper end surface of the guide plate abuts against and is slidingly connected with the inner side surface of the material conveying pipe, the guide plate forms a jet groove between two adjacent guide plates, a jet port is arranged at the rear end surface of the jet groove, the axis of the jet port is coaxially distributed with the jet groove, the jet ports are connected in parallel, and the jet ports are respectively communicated with the shunt pipe through the guide pipe, the shunt pipe is connected with the outer surface of the sheath pipe and has a circular arc structure coaxially distributed with the sheath pipe, the shunt pipe is communicated with the booster pump group through the guide pipe, the booster pump group is located outside the sheath pipe and is communicated with the multi-way valve through the guide pipe, the multi-way valve is further communicated with the external air environment and the material conveying pipe close to the material pumping system through the guide pipe, at least one shunt port is arranged on each material conveying pipe, the shunt port is communicated with the guide pipe between the control valve and the multi-way valve, and the modified reserved slurry is located in at least one material conveying pipe.

[0007] Further, the booster pump group comprises a bearing base, a jet pump, an air compressor and a driving circuit, wherein the bearing base is a plate-shaped structure with a rectangular cross section, the jet pump and the air compressor are both one and are connected with the upper end surface of the bearing base, the jet pump and the air compressor are connected in parallel, the output ends of the jet pump and the air compressor are communicated with the multi-way valve through the guide pipe and are communicated with the shunt pipe through the multi-way valve; meanwhile, the input ends of the jet pump and the air compressor are communicated with the multi-way valve through the guide pipe, the input end of the air compressor is communicated with the external air environment through the multi-way valve, the jet pump is communicated with the shunt port of the material conveying pipe through the multi-way valve, the driving circuit is connected with the outer surface of the bearing base and is electrically connected with the jet pump, the air compressor and the multi-way valve.

[0008] Further, the driving circuit is a circuit system based on a programmable controller, and a control interface including but not limited to any one or several of a display, a potentiometer, a button, and a keyboard is further arranged.

[0009] Further, the inner lining pipe is a reduced-diameter pipe structure, and 1 / 4-1 / 2 of the inner lining pipe is located in the material conveying pipe.

[0010] Further, the flow guide plate is a plate structure in any one of a rectangular shape and a circular arc shape, and the plate surface is vertically distributed with the inner lining pipe and the sheath pipe wall, the flow guide plate includes a hard flow guide segment, an elastic adjusting segment, and an elastic sealing strip, the elastic adjusting segment is located in the material conveying pipe together with the front half of the inner lining pipe away from the material pumping system, the upper end surface and the lower end surface of the elastic adjusting segment are each provided with an elastic sealing strip, and the elastic sealing strips are respectively in abutting and sliding connection with the outer side surface of the inner lining pipe and the inner side surface of the sheath pipe, the rear end surface of the elastic adjusting segment is located outside the material conveying pipe and connected with the front end surface of the hard flow guide segment, and the lower end surface of the hard flow guide segment is connected with the outer side surface of the inner lining pipe through a bolt, and the upper end surface of the hard flow guide segment is in abutting and sliding connection with the inner side surface of the sheath pipe.

[0011] Further, the elastic adjusting segment and the hard flow guide segment are in sliding connection through a sliding groove, and the sliding groove is embedded in the front end surface of the hard flow guide segment, and the cross section of the elastic adjusting segment is an inverted right-angled trapezoidal structure, and the width of the upper end surface is 1.5-3 times the width of the lower end surface.

[0012] Further, the modified reserved slurry is located in the material conveying pipe in front of the inner lining pipe and the sheath pipe of the anti-settling pumping mechanism.

[0013] Further, the modified reserved slurry is prepared from the following components in parts by weight: gangue with a particle size of 3.0-1.18 mm 28%-33%, gangue with a particle size of 1.18-0.6 mm 16.1%-18.2%, gangue with a particle size of 0.6-0.3 mm 13.9%-16.2%, gangue with a particle size of 0.3-0.15 mm 15%-17.2%, and gangue with a particle size of <0.15 mm 19.5%-20.5%, and the balance is water.

[0014] A use method of a gangue slurry long-distance conveying washing-free pipeline system, including the following steps:

[0015] S1, system layout, according to the material conveying distance and direction, the material conveying pipe, the material pumping system, and the anti-settling pumping mechanism are laid out, and at least one material conveying pipeline is formed, and at least one anti-settling pumping mechanism is arranged on each material conveying pipeline, and a modified reserved slurry is prearranged in the material conveying pipeline, and the volume of the modified reserved slurry is at least 60% of the total volume of the material conveying pipe in front of the anti-settling pumping mechanism;

[0016] S2, material conveying, after the step S1, the material conveying can be carried out, in the material conveying, firstly, the channel pressure value and the flow value when the material and the anti-settling pumping mechanism run are calculated according to the flow resistance calculation function, then the material pumping system and the anti-settling pumping mechanism are driven to run according to the calculation result, so that the material conveying operation can be realized, and after the material conveying operation is completed, the modified pre-reserve slurry is injected into the conveying pipeline through the material pumping system again, so that the material conveying is completed and the equipment preset for subsequent material conveying is realized.

[0017] Further, the flow resistance calculation function in the step S2 is:

[0018]

[0019] Wherein: τ0 is the yield stress, Pa; η is the viscosity coefficient, Pa·s; D is the pipeline diameter, m; V is the fluid flow rate, m / s;

[0020] At the same time, the time interval between adjacent two material conveyings is not more than 72 hours.

[0021] Compared with the prior art, the present application realizes that the material conveying needs can still be directly met after the material conveying pipeline is placed for 72 hours by preferably configuring the pure gangue slurry with the advantages of small settlement, low segregation rate and weak consolidation, avoids the phenomenon of blockage caused by the need for the gangue slurry to be placed in the pipeline for 72 hours, and thus meets the needs of filling system regular maintenance, interruption, stagnation, filling process adjustment and other needs of stopping filling without cleaning the pipeline, effectively realizes the long-distance conveying of the gangue slurry without washing the pipeline, simplifies the filling process, improves the filling efficiency, and avoids the problem of pipe blockage caused by the filling stop process. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be described in detail below in combination with the drawings and specific embodiments;

[0023] Figure 1 The present application is a system structure schematic diagram;

[0024] Figure 2 It is a partial structure schematic diagram of the anti-settling pumping mechanism;

[0025] Figure 3 It is a partial structure schematic diagram of the inner lining pipe, the sheath pipe and the flow guide plate cross section;

[0026] Figure 4 It is a partial structure schematic diagram of the flow guide plate;

[0027] Figure 5 It is a partial structure schematic diagram of the booster pump group from the top;

[0028] Figure 6 It is a method flowchart schematic diagram of the present application. Detailed Implementation

[0029] To facilitate the implementation of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific embodiments.

[0030] like Figures 1-5 As shown, a long-distance, wash-free pipeline system for conveying gangue slurry includes a material conveying pipe 2 and a material pumping system 3, wherein the material conveying pipe 2 is connected to the material pumping system 3, and at least one anti-sinking pumping mechanism 1 is provided on the material conveying pipe 2. The anti-sinking pumping mechanism 1 is located between two adjacent material conveying pipes 2, and the two adjacent material conveying pipes 2 are interconnected through the anti-sinking pumping mechanism 1.

[0031] In this embodiment, the anti-settlement pumping mechanism 1 includes an inner liner 11, a sheath 12, a guide plate 13, a diverter 14, a jet nozzle 15, a booster pump set 16, a multi-way valve 17, and modified pre-reserved slurry 18. The rear end face of the inner liner 11 is connected to the material conveying pipe 2 located near the material pumping system 3 via a flange and is coaxially distributed. Simultaneously, the front end face of the inner liner 11 is embedded within the material conveying pipe 2 located away from the material pumping system 3, and the outer diameter of the front end face of the inner liner 11 is no greater than 80% of the inner diameter of the material conveying pipe 2. The sheath 12 covers the inner liner 11 and is coaxially distributed with the inner liner 11. The rear end face of the sheath 12 is connected to the rear end face of the inner liner 11, and the front end face is connected to the material conveying pipe 2 located away from the material pumping system 3 via a connecting flange. The inner side of the sheath 12 is connected to the inner liner 11 via several guide plates 13, and the guide plates 13 are evenly distributed around the axis of the inner liner 11. The surface of the guide plates 13 forms an angle of 15° to 60° with the axis of the sheath 12. The front half of the guide plates 13 is located away from the inner liner 11 along with the front half of the inner liner 11. Inside the material conveying pipe 2 of the material pumping system 3, the upper end face of the guide plate 13 abuts against and slides with the inner side of the material conveying pipe 2. In the guide plate 13, two adjacent guide plates 13 form a jet groove 19. A jet port 15 is provided at the rear end face of the jet groove 19. The axis of the jet port 15 is coaxially distributed with the jet groove 19. At the same time, the jet ports 15 are connected in parallel and are respectively connected to the diversion pipe 14 through the guide pipe. The diversion pipe 14 is connected to the outer surface of the sheath pipe 12 and is an arc-shaped structure coaxially distributed with the sheath pipe 12. Meanwhile, the diversion pipe 14 is connected to the booster pump group 16 through the guide pipe. The booster pump group 16 is located outside the sheath pipe 12 and is connected to the multi-way valve 17 through the guide pipe. The multi-way valve 17 is also connected to the external air environment and the material conveying pipe 2 near the material pumping system 3 through the guide pipe. In the material conveying pipe 2, each material conveying pipe 2 is provided with at least one diversion port 4, and the diversion port 4 is connected to the multi-way valve 17 through the guide pipe between the control valve 5 and the multi-way valve 17. The modified reserved slurry 18 is located in at least one of the material conveying pipes 2.

[0032] The booster pump set 16 includes a bearing base 161, a jet pump 162, an air compressor 163, and a driving circuit 164. The bearing base 161 is a plate-shaped structure with a rectangular cross-section. The jet pump 162 and the air compressor 163 are connected to the upper end surface of the bearing base 161. The jet pump 162 and the air compressor 163 are connected in parallel. The output ends of the jet pump 162 and the air compressor 163 are connected to the multi-way valve 17 through a flow guide pipe, and are connected to the shunt pipe 14 through the multi-way valve 17. The input ends of the jet pump 162 and the air compressor 163 are connected to the multi-way valve 17 through a flow guide pipe. The input end of the air compressor 163 is connected to the external air environment through the multi-way valve 17. The jet pump 162 is connected to the shunt port 4 of the material conveying pipe 2 through the multi-way valve 17. The driving circuit 164 is connected to the outer surface of the bearing base 161, and is electrically connected to the jet pump 162, the air compressor 163, and the multi-way valve 17.

[0033] Further optimization, the control valve 5 is electrically connected with the driving circuit 164.

[0034] The driving circuit 164 is a circuit system based on a programmable controller, and a control interface including but not limited to a display, a potentiometer, a button, and a keyboard is provided.

[0035] Further optimization, the inner lining pipe 11 is a reduced diameter pipe structure, and 1 / 4-1 / 2 of the pipe is located in the material conveying pipe 2.

[0036] The flow guide plate 13 is a plate-shaped structure with a rectangular or circular arc shape, and the plate surface is perpendicular to the pipe wall of the inner lining pipe 11 and the sheath pipe 12. The flow guide plate 13 includes a hard flow guide segment 131, an elastic adjustment segment 132, and an elastic sealing strip 133. The elastic adjustment segment 132 is located in the material conveying pipe 2 away from the material pumping system 3 together with the front half of the inner lining pipe 11. The upper end surface and the lower end surface of the elastic adjustment segment 132 are provided with an elastic sealing strip 133, and are connected to the outer side surface of the inner lining pipe 11 and the inner side surface of the sheath pipe 12 through the elastic sealing strip 133. The rear end surface of the elastic adjustment segment 132 is located outside the material conveying pipe 2 and is connected to the front end surface of the hard flow guide segment 131. The lower end surface of the hard flow guide segment 131 is connected to the outer side surface of the inner lining pipe 11 through a bolt, and the upper end surface of the hard flow guide segment 131 is connected to the inner side surface of the sheath pipe 12.

[0037] It should be noted that the elastic adjustment segment 132 and the hard flow guide segment 131 are connected to each other through a sliding groove 134, and the sliding groove 134 is embedded in the front end surface of the hard flow guide segment 131. The cross-section of the elastic adjustment segment 132 is an inverted right-angle trapezoidal structure, and the width of the upper end surface is 1.5-3 times the width of the lower end surface.

[0038] The front half of the guide plate is provided as an elastic adjustment section, which can be elastically vibrated under the driving of the material flow or air flow of the jet flow, so that mechanical vibration is realized to finely adjust the direction of the jet material, and the material deposited in the material conveying pipe can be further shaken by mechanical vibration, so that the blockage phenomenon caused by material deposition is further overcome.

[0039] In the embodiment, the modified reserved slurry 18 is located in the material conveying pipe 2 in front of the inner lining pipe 11 and the sheath pipe 12 of the anti-settling pumping mechanism 1.

[0040] In the embodiment, the modified reserved slurry 18 is composed of the following components by weight: gangue with a particle size of 3.0-1.18 mm 28%-33%, gangue with a particle size of 1.18-0.6 mm 16.1%-18.2%, gangue with a particle size of 0.6-0.3 mm 13.9%-16.2%, gangue with a particle size of 0.3-0.15 mm 15%-17.2%, and gangue with a particle size of <0.15 mm 19.5%-20.5%, and the balance is water.

[0041] As shown in Figure 6 A use method of a gangue slurry long-distance conveying wash-free pipeline system, comprising the following steps:

[0042] S1, system layout, according to the material conveying distance and direction, the material conveying pipe, the material pumping system and the anti-settling pumping mechanism are laid out, and at least one material conveying pipeline is formed, and at least one anti-settling pumping mechanism is arranged on each material conveying pipeline, and a modified reserved slurry is pre-set in the material conveying pipeline, and the volume of the modified reserved slurry is at least 60% of the total volume of the material conveying pipe in front of the anti-settling pumping mechanism;

[0043] S2, material conveying, after completing the step S1, the material conveying can be carried out, first, the channel pressure value and the flow value when the material and the anti-settling pumping mechanism are running are calculated according to the flow resistance calculation function, then the material pumping system and the anti-settling pumping mechanism are driven to run according to the calculation results, so that the material conveying operation can be realized, and after completing the material conveying operation, the modified reserved slurry is injected into the conveying pipeline again through the material pumping system, so that the material conveying is completed and the equipment pre-setting for subsequent material conveying is realized.

[0044] In the embodiment, the flow resistance calculation function in the step S2 is as follows:

[0045]

[0046] Wherein, τ0 is the yield stress, Pa; η is the viscosity coefficient, Pa·s; D is the pipeline diameter, m; V is the fluid flow rate, m / s;

[0047] At the same time, the time interval between two adjacent material transport is not more than 72 hours.

[0048] At the same time, in the process of material transport, the anti-settling pumping mechanism works as follows:

[0049] When the material pumping system is insufficient in transport power due to long transport distance, or the pipeline is stationary and the material transport is restarted, the booster pump group of the anti-settling pumping mechanism is started, wherein:

[0050] When the jet pump is running, on the one hand, part of the material in the material transport pipe connected to the input end of the inner liner pipe and the sheath pipe is pressurized and then forms high-pressure material jet after being guided through the multiple jet grooves composed of the inner liner pipe, the sheath pipe and the guide plate, thereby providing power for the forward transport of part of the material in the material transport pipe connected to the output end of the inner liner pipe and the sheath pipe, and on the other hand, providing a rotating anti-line stirring driving force, which drives the material to rotate and stir, thereby overcoming and improving the deposition of the material and improving the overall fluidity of the material.

[0051] When the air compressor is running, the external air is pressurized and then forms multiple high-pressure air jets after being guided through the jet grooves, thereby utilizing the high-pressure air to provide power for the forward transport of part of the material in the material transport pipe connected to the output end of the inner liner pipe and the sheath pipe, and on the other hand, providing a rotating anti-line stirring driving force, which drives the material to rotate and stir, thereby overcoming and improving the deposition of the material and improving the overall fluidity of the material. At the same time, an air cushion is formed between the material and the wall of the material transport pipe, thereby reducing the friction between the material and the wall of the pipe and further improving the efficiency and transport efficiency of the material transport.

[0052] In addition, the jet pump and the air compressor can also be driven to run synchronously, further improving the driving power for material transport.

[0053] In order to better explain the related technical content in the content of the present application to those skilled in the art, the technical content of the present application file is explained and described in combination with specific experimental data:

[0054] Embodiment:

[0055] As shown in Figures 1-5 A gangue slurry long-distance transport free-washing pipe technology is given, which has the advantages of small settlement, low segregation rate and weak consolidation, as shown in the preferred gangue particle size grading table, and does not affect the normal transport of the gangue slurry after standing for more than 48 hours.

[0056] First step, preparation of the pure gangue slurry and the conventional cementitious material gangue slurry given above;

[0057] Second step, carry out the loop test, the test section pipeline length 50.6m, pipeline inner diameter 125mm, pipeline wall is seamless steel pipe, the rated pressure of industrial pump is 20MPa, the conventional cementitious material gangue slurry is conveyed in the pipeline;

[0058] Third step, after the conventional cementitious material gangue slurry is conveyed stably in the pipeline, stop conveying, replace the conventional cementitious material gangue slurry with pure gangue slurry, pump the pure gangue slurry into the pipeline through the industrial pump, gradually push the conventional cementitious material gangue slurry in the pipeline out of the pipeline;

[0059] Fourth step, after the pipeline is full of pure gangue slurry, start to stand, the standing time is set as 2h, 4h, 8h, 12h, 16h, 24h, 48h, 72h and 96h respectively, after each standing time period, pump the pure gangue slurry in the pipeline, the pumping rate is set as 1.85m / s and 2.5m / s, the pressure sensor is used to monitor the pressure generated by the gangue slurry in the process of pumping at the two rates, the monitoring results are shown in the pressure of the gangue slurry on the pipeline wall at the flow rate of 1.85m / s under different standing times.

[0060] Preferred gangue particle size grading table

[0061] Particle size range / mm Mass / g Mass percentage / % Cumulative percentage / % 3.0～1.18 212.65 31.12 31.13 1.18～0.6 121.08 17.73 48.86 0.6～0.3 103.97 15.22 64.08 0.3～0.15 109.27 16.00 80.08 ＜0.15 136.08 19.92 100

[0062] Pressure of the gangue slurry on the pipeline wall at the flow rate of 1.85m / s under different standing times

[0063]

[0064]

[0065] The pressure loss, flow rate and pipeline inner diameter obtained when the slurry concentration is 68% and the slurry flow rate is 1.85m / s and 2.50m / s respectively are substituted into the following formula for calculating the flow resistance:

[0066]

[0067] Wherein: τ0 is the yield stress, Pa; η is the viscosity coefficient, Pa·s; D is the pipeline diameter, m; V is the fluid flow rate, m / s.

[0068] The two sets of data at the flow rates of 1.85m / s and 2.50m / s are substituted into the formula to calculate the viscosity coefficient and yield stress of the pure gangue slurry at the two flow rates, and the results are shown in the rheological parameters of the slurry under different standing times.

[0069] Rheological parameters of the slurry under different standing times

[0070] Resting time / h Viscosity coefficient / Pa s Yield stress / Pa 2 0.624 38.43 4 0.610 44.38 8 0.756 32.30 12 0.524 63.89 24 0.621 57.50 48 0.735 53.41 72 0.696 61.66 96 0.488 89.93

[0071] The viscosity coefficient and yield stress of the pure gangue slurry in different standing time periods shown in the rheological parameter table of the slurry in different standing time are substituted into the calculation formula, so that the resistance estimation formula of the pure gangue slurry in different standing time periods is obtained, and the total resistance result of the pure gangue slurry in different standing time periods is obtained under the long-distance conveying condition of the pipe diameter of 175 mm and the pipe length of 10 km according to the actual filling pipe specification, as shown in the following table. Figure 2 The total resistance is the minimum value of the required pumping pressure for the actual filling, and according to the result shown in the preferred gangue particle size grading table, when the pure gangue slurry is standing in the pipe for 72 h, the total resistance of the pure gangue slurry in the pipe with a length of 10 km is 18.46 MPa, the rated pumping pressure of 20 MPa given in the foregoing can ensure the normal pumping of the pure gangue slurry, and when the standing time exceeds 72 h, the total resistance is greater than the rated pumping pressure of 20 MPa, and the pure gangue slurry cannot be normally pumped.

[0072] Therefore, the pure gangue slurry is prepared according to the preferred gangue grading of the present application, and the standing time is within 72 h, and the standing for 72 h can meet the needs of the filling system for regular maintenance, interruption, stagnation, filling process adjustment and the like, and the pipe does not need to be cleaned, so that the long-distance conveying of the gangue slurry without washing the pipe is effectively realized, the filling process is simplified, the filling efficiency is improved, and the pipe blocking problem caused by the filling pause process is avoided.

[0073] Compared with the prior art, the present application preferably configures the pure gangue slurry based on the advantages of small sedimentation, low segregation rate and weak consolidation, so that the need for material conveying can be directly met after the material conveying pipe is standing for 72 hours, the blocking phenomenon caused by the need for the gangue slurry to stand in the pipe for 72 h is avoided, and the filling system for regular maintenance, interruption, stagnation, filling process adjustment and the like is temporarily stopped without the need for cleaning the pipe, so that the long-distance conveying of the gangue slurry without washing the pipe is effectively realized, the filling process is simplified, the filling efficiency is improved, and the pipe blocking problem caused by the filling pause process is avoided.

[0074] The basic principles and main features of the present application are shown and described, and the advantages of the present application are shown and described. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A gangue slurry long distance conveying non-cleaning pipeline system, comprising a material conveying pipe and a material pumping system, and the material conveying pipe is communicated with the material pumping system, characterized in that, The material conveying pipe is provided with at least one anti-settling pumping mechanism, which is located between two adjacent material conveying pipes and is connected with the two adjacent material conveying pipes through the anti-settling pumping mechanism. The anti-settling pumping mechanism comprises an inner lining pipe, a sheath pipe, a guide plate, a shunt pipe, a jet port, a booster pump group, a multi-way valve and modified reserved slurry. The rear end surface of the inner lining pipe is connected with the material conveying pipe located on the side close to the material pumping system through a flange and is coaxially distributed, while the front end surface of the inner lining pipe is embedded in the material conveying pipe located away from the material pumping system, and the outer diameter of the front end surface of the inner lining pipe is not greater than 80% of the inner diameter of the material conveying pipe. The sheath pipe is wrapped outside the inner lining pipe and is coaxially distributed with the inner lining pipe. The rear end surface of the sheath pipe is connected with the rear end surface of the inner lining pipe, and the front end surface is connected with the material conveying pipe located away from the material pumping system through a connecting flange. The inner side surface of the sheath pipe is connected with the inner lining pipe through a plurality of guide plates. The guide plates are evenly distributed around the axis of the inner lining pipe. The guide plate surface forms an angle of 15°-60° with the axis of the sheath pipe. The front half of the guide plate is located in the material conveying pipe located away from the material pumping system together with the front half of the inner lining pipe, and the upper end surface of the guide plate is in abutting and sliding connection with the inner side surface of the material conveying pipe. Adjacent two guide plates form a jet groove. A jet port is arranged at the rear end surface of the jet groove. The axis of the jet port is coaxially distributed with the jet groove, and the jet ports are connected in parallel and connected with the shunt pipe through the guide pipe, respectively. The shunt pipe is connected with the outer surface of the sheath pipe and has a circular arc structure coaxially distributed with the sheath pipe. The shunt pipe is connected with the booster pump group through the guide pipe. The booster pump group is located outside the sheath pipe and is connected with the multi-way valve through the guide pipe. The multi-way valve is connected with the external air environment and the material conveying pipe located close to the material pumping system through the guide pipe, respectively. At least one shunt port is arranged on each material conveying pipe, and the shunt port is connected with the guide pipe between the control valve and the multi-way valve. The modified reserved slurry is located in at least one material conveying pipe.

2. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 1, characterized in that, The booster pump group comprises a bearing base, a jet pump, an air compressor and a driving circuit. The bearing base has a rectangular plate structure in cross section. The jet pump and the air compressor are connected with the upper end surface of the bearing base. The jet pump and the air compressor are connected in parallel. The output ends of the jet pump and the air compressor are connected with the multi-way valve through the guide pipe and are connected with the shunt pipe through the multi-way valve. The input ends of the jet pump and the air compressor are connected with the multi-way valve through the guide pipe. The input end of the air compressor is connected with the external air environment through the multi-way valve. The jet pump is connected with the shunt port of the material conveying pipe through the multi-way valve. The driving circuit is connected with the outer surface of the bearing base and is electrically connected with the jet pump, the air compressor and the multi-way valve, respectively.

3. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 2, characterized in that, The driving circuit is a circuit system based on a programmable controller and is provided with a control interface including but not limited to any one or several of a display, a potentiometer, a button and a keyboard.

4. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 1, characterized in that, The inner lining pipe is a reduced diameter pipe structure, and 1 / 4-1 / 2 of the pipe is located in the material conveying pipe.

5. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 1, characterized in that, The guide plate is in the shape of a rectangle or a circular arc, and the plate surface is perpendicular to the wall of the inner lining pipe and the sheath pipe. The guide plate comprises a hard guide section, an elastic adjusting section, and an elastic sealing strip. The elastic adjusting section is located in the material conveying pipe together with the front half of the inner lining pipe, away from the material pumping system. The upper and lower end surfaces of the elastic adjusting section are provided with an elastic sealing strip, and are in abutting and sliding connection with the outer surface of the inner lining pipe and the inner surface of the sheath pipe, respectively. The rear end surface of the elastic adjusting section is located outside the material conveying pipe and is connected with the front end surface of the hard guide section. The lower end surface of the hard guide section is connected with the outer surface of the inner lining pipe through a bolt, and the upper end surface of the hard guide section is in abutting and sliding connection with the inner surface of the sheath pipe.

6. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 5, characterized in that, The elastic adjusting section and the hard guide section are in sliding connection through a sliding groove, and the sliding groove is embedded in the front end surface of the hard guide section. The cross section of the elastic adjusting section is in the shape of an inverted right-angled trapezoid, and the width of the upper end surface is 1.5-3 times the width of the lower end surface.

7. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 1, characterized in that, The modified reserved slurry is located in the material conveying pipe in front of the inner lining pipe and the sheath pipe of the anti-settling pumping mechanism.

8. The gangue slurry long distance conveying non-cleaning pipeline system according to claim 1 or 7, characterized in that, The modified reserved slurry is prepared from the following components in parts by weight: gangue with a particle size of 3.0-1.18 mm 28%-33%, gangue with a particle size of 1.18-0.6 mm 16.1%-18.2%, gangue with a particle size of 0.6-0.3 mm 13.9%-16.2%, gangue with a particle size of 0.3-0.15 mm 15%-17.2%, and gangue with a particle size of <0.15 mm 19.5%-20.5%, and the balance being water.

9. A method of using the gangue slurry long-distance conveying non-cleaning pipeline system according to claim 1, characterized in that, The use method of the gangue slurry long-distance conveying non-washing pipeline system comprises the following steps: S1, system layout, according to the material conveying distance and direction, the material conveying pipe, the material pumping system and the anti-settling pumping mechanism are laid out, and at least one material conveying pipeline is formed, and at least one anti-settling pumping mechanism is arranged on each material conveying pipeline. Meanwhile, the modified reserved slurry is pre-set in the material conveying pipeline, and the volume of the modified reserved slurry is at least 60% of the total volume of the material conveying pipe in front of the anti-settling pumping mechanism; S2, material conveying, after the completion of S1, the material conveying can be carried out. In the material conveying, the channel pressure value and the flow value during the operation of the material and the anti-settling pumping mechanism are calculated according to the flow resistance calculation function, and then the material pumping system and the anti-settling pumping mechanism are driven to operate according to the calculation results, so that the material conveying operation can be realized. After the completion of the material conveying operation, the modified reserved slurry is injected into the conveying pipeline through the material pumping system again, so that the material conveying is completed and the equipment preset for subsequent material conveying is realized.

10. A method of using the gangue slurry long-distance conveying non-cleaning pipeline system according to claim 9, characterized in that, The flow resistance calculation function in S2 is: Wherein: τ0 is the yield stress, Pa; η is the viscosity coefficient, Pa·s; D is the pipeline diameter, m; V is the fluid flow rate, m / s; Meanwhile, the time interval between adjacent two material conveyings is not more than 72 hours.

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