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

Abstract

The invention relates to a gangue slurry long-distance conveying washing-free pipeline system which comprises material conveying pipes and a material pumping system, the material conveying pipes are communicated with the material pumping system, at least one anti-settling pumping mechanism is additionally arranged on each material conveying pipe, and each anti-settling pumping mechanism is located between every two adjacent material conveying pipes. Every two adjacent material conveying pipes communicate with each other through an anti-settling pumping mechanism, and each anti-settling pumping mechanism comprises a lining pipe, a protective casing pipe, a flow guide plate, a flow dividing pipe, a jet flow opening, a booster pump set, a multi-way valve and modified reserved slurry. The using method comprises the two steps of system arrangement and material conveying. According to the method, the blockage phenomenon caused by standing of the gangue slurry in the pipeline is avoided, so that the filling process is simplified, the filling efficiency is improved, and the pipe blockage problem caused by the filling pause process is avoided.

Description

Technical Field

[0001] The invention relates to a long-distance conveying and washing-free pipeline system for gangue slurry and a use method thereof, belonging to the technical field of filling operations. Background Art

[0002] At present, the gangue slurry filling goaf first crushes the gangue into a certain particle size range, and then adds cement and other gelling materials, mixes with mine water or tap water to form a slurry of a certain mass concentration, and transports it to the filling area through the slurry conveying system. However, with the increase of mining depth, the filling pipeline becomes longer and longer, but the long-distance gangue slurry transportation is prone to pipe blocking, especially during the filling period, there are filling interruptions, stagnation, equipment maintenance, filling process adjustment and other situations that require filling to be suspended. When the gangue slurry is retained in the pipeline for more than 4 hours, the gangue slurry is prone to sedimentation and segregation, resulting in pipeline blockage. For the pipe blocking problem, the main way to avoid pipe blocking is to clean the pipeline in time. However, when the transportation distance exceeds 5km, the workload of cleaning the pipeline is large, the cleaning process is complicated, and a large amount of water is required. The water used to clean the pipeline is discharged to the underground and then pumped back to the surface for reuse. In addition, the original short-distance transportation technology of filling slurry and the proportion of gangue slurry are difficult to meet the requirements of long-distance gangue slurry transportation.

[0003] Based on the above engineering problems, the present invention proposes a long-distance conveyance of gangue slurry without washing pipe technology. This technology does not require cleaning of the filling pipeline, greatly simplifies the filling pipeline cleaning process, and can effectively avoid pipe blockage problems. While meeting the requirements of long-distance conveyance of gangue slurry, it reduces the workload of pipeline cleaning and provides technical support for realizing long-distance and stable conveyance of gangue slurry. Summary of the invention

[0004] In order to address the deficiencies in the prior art, the present invention provides a cleaning-free pipeline system and method for long-distance transportation of gangue slurry. The present invention, through the preferred configuration of pure gangue slurry with the advantages of small sedimentation, low segregation rate and weak consolidation, effectively achieves that the material transportation needs can still be directly met after the material transportation pipeline is left to stand for 72 hours, avoiding the blockage phenomenon caused by the need for the gangue slurry to stand in the pipeline for 72 hours, and thereby meets the needs of routine maintenance, interruption, stagnation, filling process adjustment, etc. of the filling system, and does not require pipeline cleaning, effectively achieving the purpose of long-distance transportation of gangue slurry without pipe cleaning, simplifying the filling process, improving the filling efficiency, and avoiding the pipe blockage problem caused by the filling suspension process.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A long-distance non-washing pipeline system for conveying gangue slurry comprises a material conveying pipe and a material pumping system, wherein the material conveying pipe is connected to the material pumping system, at least one anti-sinking pumping mechanism is arranged on the material conveying pipe, the anti-sinking pumping mechanism is located between two adjacent material conveying pipes, and the two adjacent material conveying pipes are connected to each other through the anti-sinking pumping mechanism, the anti-sinking pumping mechanism comprises an inner liner pipe, a jacket pipe, a guide plate, a diverter pipe, a jet port, a booster pump group, a multi-way valve and a modified reserved slurry, wherein the rear end face of the inner liner pipe is connected to the material pumping system through a flange The material conveying pipes close to the material pumping system are connected and coaxially distributed. At the same time, the front end face of the liner pipe is embedded in the material conveying pipe far away from the material pumping system, and the outer diameter of the front end face of the liner pipe is not greater than 80% of the inner diameter of the material conveying pipe. The jacket pipe is wrapped outside the liner pipe and coaxially distributed with the liner pipe. The rear end face of the jacket pipe is connected to the rear end face of the liner pipe. The front end face is connected to the material conveying pipe far away from the material pumping system through a connecting flange. The inner side of the jacket pipe is connected to the liner pipe through a plurality of guide plates, and the guide plates surround The axis of the inner liner pipe is evenly distributed, and the guide plate surface and the axis of the jacket pipe are at an angle of 15°-60°. The front half of the guide plate is located together with the front half of the inner liner pipe in the material conveying pipe away from the material pumping system, and the upper end surface of the guide plate is against and slidably connected with the inner side surface of the material conveying pipe. In the guide plate, a laser groove is formed between two adjacent guide plates, and a jet port is arranged at the rear end surface of the laser groove. The axis of the jet port is coaxially distributed with the laser groove. At the same time, the jet ports are connected in parallel and are connected to the diversion pipe through the guide pipe respectively. The diversion pipe is connected to the outer surface of the jacket pipe. The surface is connected and is an arc-shaped structure coaxially distributed with the jacket pipe. At the same time, the diverter pipe is connected to the booster pump group through the guide pipe. The booster pump group is located outside the jacket pipe and is connected to the multi-way valve through the guide pipe. The multi-way valve is connected to the external air environment and the material conveying pipe close to the material pumping system through the guide pipe. In the material conveying pipe, each material conveying pipe is provided with at least one diverter port, and the diverter port is connected to the guide pipe between the control valve and the multi-way valve. The modified reserved slurry is located in at least one of the material conveying pipes.

[0007] Furthermore, the booster pump group includes a supporting base, a jet pump, an air compressor and a driving circuit, wherein the supporting base is a plate-like structure with a rectangular cross-section, the jet pump and the air compressor are each one and are connected to the upper end surface of the supporting base, the jet pump and the air compressor are connected in parallel with each other, and the output ends of the jet pump and the air compressor are connected to the multi-way valve through a guide tube, and are connected to the diversion pipe through the multi-way valve; at the same time, the input ends of the jet pump and the air compressor are connected to the multi-way valve through the guide tube, and the input end of the air compressor is connected to the external air environment through the multi-way valve, the jet pump is connected to the diversion port of the material conveying pipe through the multi-way valve, the driving circuit is connected to the outer surface of the supporting base, and is electrically connected to the jet pump, the air compressor and the multi-way valve respectively.

[0008] Furthermore, the driving circuit is a circuit system based on a programmable controller, and is also provided with any one or several common control interfaces including but not limited to a display, a potentiometer, a button, and a keyboard.

[0009] Furthermore, the inner liner pipe is a reduced diameter pipe structure, and 1 / 4 to 1 / 2 of the inner liner pipe is located in the material conveying pipe.

[0010] Furthermore, the guide plate is a plate-like structure of either a rectangle or an arc shape, and its plate surface is vertically distributed to the walls of the liner pipe and the casing pipe. The guide plate includes a hard guide section, an elastic adjustment section and an elastic sealing strip, wherein the elastic adjustment section is located together with the front half of the liner pipe in a material conveying pipe away from the material pumping system, and an elastic sealing strip is provided on the upper end face and the lower end face of the elastic adjustment section, and the elastic sealing strip is respectively used to abut and slide against the outer side surface of the liner pipe and the inner side surface of the casing pipe, the rear end face of the elastic adjustment section is located outside the material conveying pipe and is connected to the front end face of the hard guide section, the lower end face of the hard guide section is connected to the outer side surface of the liner pipe by bolts, and at the same time, the upper end face of the hard guide section is abutted against and slide-connected to the inner side surface of the casing pipe.

[0011] Furthermore, the elastic adjustment section and the hard guide section are slidably connected to each other through a slide groove, and the slide groove is embedded in the front end surface of the hard guide section. The cross-section of the elastic adjustment section is an inverted right-angled trapezoidal structure, and the width of its upper end surface is 1.5-3 times the width of the lower end surface.

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

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

[0014] A method for using a long-distance gangue slurry transportation non-washing pipeline system comprises the following steps:

[0015] S1, system layout, according to the material conveying distance and direction, the material conveying pipe, material pumping system and anti-sinking pumping mechanism are laid out to form at least one material conveying pipeline, and each material conveying pipeline is provided with at least one anti-sinking pumping mechanism, and at the same time, a modified reserved slurry is preset 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-sinking pumping mechanism;

[0016] S2, material transportation. Material transportation can be carried out after completing step S1. During material transportation, the channel pressure value and flow value when the material and anti-sinking pumping mechanism are in operation are first calculated according to the flow resistance calculation function. Then, the material pumping system and the anti-sinking pumping mechanism are driven to operate at the same time according to the calculation results to realize the material transportation operation. At the same time, after completing the material transportation operation, the modified reserved slurry is injected into the conveying pipeline again through the material pumping system to complete the material transportation and realize the equipment preset for subsequent material transportation.

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

[0018]

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

[0020] At the same time, the time interval between two adjacent material transportations shall not exceed 72 hours.

[0021] Compared with the prior art, the present invention, through the preferred configuration of pure gangue slurry with the advantages of small sedimentation, low segregation rate and weak consolidation, can effectively achieve the direct satisfaction of material transportation needs after the material conveying pipeline has been left standing for 72 hours, avoiding the blockage caused by the need for the gangue slurry to stand in the pipeline for 72 hours, and thereby meeting the needs of routine maintenance, interruption, stagnation, filling process adjustment, etc. of the filling system, without the need to clean the pipeline, effectively achieving the purpose of long-distance transportation of gangue slurry without pipe cleaning, simplifying the filling process, improving the filling efficiency, and avoiding the pipe blockage problem caused by the filling suspension process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0023] Figure 1 It is a schematic diagram of the system structure of the present invention;

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

[0025] Figure 3 It is a schematic diagram of the local structure of the cross-section of the liner pipe, the jacket pipe and the guide plate;

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

[0027] Figure 5 It is a schematic diagram of the local structure of the booster pump unit from a bird's-eye view;

[0028] Figure 6 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0029] In order to facilitate the construction of the technical means, creative features, objectives and effects achieved by the present invention, the present invention is further described below in conjunction with specific implementation methods.

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

[0031] In this embodiment, the anti-sinking pumping mechanism 1 includes an inner liner 11, a jacket pipe 12, a guide plate 13, a diverter pipe 14, a jet port 15, a booster pump group 16, a multi-way valve 17 and a modified reserved slurry 18, wherein the rear end face of the inner liner 11 is connected to the material conveying pipe 2 located on the side close to the material pumping system 3 through a flange and is coaxially distributed, and the front end face of the inner liner 11 is embedded in 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 not greater than 80% of the inner diameter of the material conveying pipe 2 The jacket pipe 12 is covered on the outside of the liner pipe 11 and is coaxially distributed with the liner pipe 11. The rear end face of the jacket pipe 12 is connected to the rear end face of the liner pipe 11, and the front end face is connected to the material conveying pipe 2 located far away from the material pumping system 3 through a connecting flange. The inner side of the jacket pipe 12 is connected to the liner pipe 11 through a plurality of guide plates 13, and the guide plates 13 are evenly distributed around the axis of the liner pipe 11. The plate surface of the guide plate 13 and the axis of the jacket pipe 12 are at an angle of 15°-60°. The front half of the guide plate 13 is located far away from the front half of the liner pipe 11. The material conveying pipe 2 of the material pumping system 3 is separated from the material conveying pipe 2, and the upper end surface of the guide plate 13 is abutted against the inner side surface of the material conveying pipe 2 and is slidably connected. In the guide plate 13, a laser groove 19 is formed between two adjacent guide plates 13, and a jet port 15 is arranged at the rear end surface of the laser groove 19. The axis of the jet port 15 is coaxially distributed with the laser groove 19. At the same time, each jet port 15 is connected in parallel and is connected to the shunt pipe 14 through the guide pipe. The shunt pipe 14 is connected to the outer surface of the jacket pipe 12 and is an arc-shaped structure coaxially distributed with the jacket pipe 12. At the same time, 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 jacket 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 close to 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 guide pipe between the multi-way valve 17 through the control valve 5. The modified reserved slurry 18 is located in at least one of the material conveying pipes 2.

[0032] It is emphasized that the booster pump group 16 includes a bearing base 161, a jet pump 162, an air compressor 163 and a drive circuit 164, wherein the bearing base 161 is a plate-shaped structure with a rectangular cross section, the jet pump 162 and the air compressor 163 are both one and connected to the upper end surface of the bearing base 161, the jet pump 162 and the air compressor 163 are connected in parallel with each other, and the output ends of the jet pump 162 and the air compressor 163 are connected to the multi-way valve 17 through the guide pipe. , and is connected to the diverter pipe 14 through a multi-way valve 17; at the same time, the jet pump 162 and the air compressor 163 input ends are connected to the multi-way valve 17 through a guide pipe, and the air compressor 163 input end is connected to the external air environment through the multi-way valve 17, the jet pump 162 is connected to the diverter port 4 of the material conveying pipe 2 through the multi-way valve 17, the drive circuit 164 is connected to the outer surface of the supporting base 161, and is electrically connected to the jet pump 162, the air compressor 163, and the multi-way valve 17 respectively.

[0033] For further optimization, the control valve 5 is also electrically connected to the drive circuit 164 .

[0034] The driving circuit 164 is a circuit system based on a programmable controller, and is also provided with any one or several common control interfaces including but not limited to a display, a potentiometer, a button, and a keyboard.

[0035] Further optimized, the inner liner pipe 11 is a reduced diameter pipe structure, and 1 / 4 to 1 / 2 of it is located in the material conveying pipe 2.

[0036] At the same time, the guide plate 13 is a plate-like structure of any one of a rectangular and an arc shape, and its plate surface is vertically distributed with the walls of the liner pipe 11 and the jacket pipe 12. The guide plate 13 includes a hard guide section 131, an elastic adjustment section 132 and an elastic sealing strip 133, wherein the elastic adjustment section 132 is located together with the front half of the liner pipe 11 in the material conveying pipe 2 away from the material pumping system 3, and the upper end face and the lower end face of the elastic adjustment section 132 are both provided with an elastic sealing strip 133, and are respectively abutted and slidably connected with the outer side surface of the liner pipe 11 and the inner side surface of the jacket pipe 12 through the elastic sealing strip 133, the rear end face of the elastic adjustment section 132 is located outside the material conveying pipe 2, and is connected with the front end face of the hard guide section 131, the lower end face of the hard guide section 131 is connected to the outer side surface of the liner pipe 11 by bolts, and at the same time, the upper end face of the hard guide section 131 is abutted and slidably connected with the inner side surface of the jacket pipe 12.

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

[0038] The front half of the guide plate is arranged as an elastic adjustment section, which can generate elastic vibration under the drive of the jet material flow or air flow, so as to realize mechanical vibration to fine-tune the direction of the jet material. In addition, the material deposited in the material conveying pipe can be vibrated by mechanical vibration, so as to further overcome the blockage caused by material deposition.

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

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

[0041] like Figure 6 As shown, a method for using a long-distance non-washing pipeline system for conveying gangue slurry comprises the following steps:

[0042] S1, system layout, according to the material conveying distance and direction, the material conveying pipe, material pumping system and anti-sinking pumping mechanism are laid out to form at least one material conveying pipeline, and each material conveying pipeline is provided with at least one anti-sinking pumping mechanism, and at the same time, a modified reserved slurry is preset 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-sinking pumping mechanism;

[0043] S2, material transportation. Material transportation can be carried out after completing step S1. During material transportation, the channel pressure value and flow value when the material and anti-sinking pumping mechanism are in operation are first calculated according to the flow resistance calculation function. Then, the material pumping system and the anti-sinking pumping mechanism are driven to operate at the same time according to the calculation results to realize the material transportation operation. At the same time, after completing the material transportation operation, the modified reserved slurry is injected into the conveying pipeline again through the material pumping system to complete the material transportation and realize the equipment preset for subsequent material transportation.

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

[0045]

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

[0047] At the same time, the time interval between two adjacent material transportations shall not exceed 72 hours.

[0048] At the same time, during material transportation, the functions of the anti-sinking pumping mechanism are as follows:

[0049] When the material pumping system is short of power due to long conveying distance, or when the pipeline is stopped and material conveying is restarted, the booster pump group of the anti-sinking pumping mechanism is turned on, including:

[0050] When the jet pump is running, on the one hand, part of the material in the material conveying pipe connected to the input end of the liner pipe and the jacket pipe can be pressurized, and then guided through multiple jet grooves formed by the liner pipe, the jacket pipe and the guide plate to form a high-pressure material jet, thereby providing a driving force for the forward transportation of part of the material in the material conveying pipe connected to the rear output end of the liner pipe and the jacket pipe, and on the other hand, providing a stirring driving force for the rotating defense line, thereby driving the material to rotate and stir, thereby overcoming the increase in material sedimentation and improving the overall fluidity of the material;

[0051] When the air compressor is running, the external air can be pressurized and then guided through the laser groove to form multiple high-pressure air jets, so that the high-pressure air is used as the driving force for conveying part of the material in the material conveying pipe connected to the rear output end of the liner pipe and the jacket pipe forward. On the other hand, it provides a stirring driving force for the rotating defense line, and drives the material to rotate and stir, thereby overcoming the material deposition 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 conveying pipe, thereby reducing the friction between the material and the pipe wall, and further improving the efficiency and conveying efficiency of the material.

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

[0053] In order to facilitate those skilled in the art to better understand the relevant technical content in this application, the technology of this application document is now explained in combination with specific experimental data:

[0054] Example:

[0055] like Figures 1 to 5 As shown, a technology for long-distance transportation of gangue slurry without washing pipes is provided, which provides the preferred gangue gradation with the advantages of small settlement, low segregation rate and weak consolidation. As shown in the preferred gangue particle size gradation table, standing for more than 48 hours will not affect the normal transportation of the gangue slurry.

[0056] The first step is to prepare the above-mentioned pure gangue slurry and conventional cement binder gangue slurry;

[0057] The second step is to carry out annular pipe test. The test section pipeline is 50.6m long, the inner diameter of the pipeline is 125mm, the pipe wall is seamless steel pipe, and the rated pressure of the industrial pump is 20MPa to transport conventional cement cementitious material gangue slurry in the pipeline;

[0058] The third step is to stop conveying the conventional cement cementitious material gangue slurry after it is stably conveyed in the pipeline, and replace the conventional cement cementitious material gangue slurry with pure gangue slurry, and pump the pure gangue slurry into the pipeline through an industrial pump, and gradually push the conventional cement cementitious material gangue slurry in the pipeline out of the pipeline;

[0059] The fourth step is to start standing after the pipeline is filled with pure gangue slurry. The standing time is set to 2h, 4h, 8h, 12h, 16h, 24h, 48h, 72h and 96h respectively. After each standing time period, the pure gangue slurry in the pipeline is pumped. The pumping rate is set to 1.85m / s and 2.5m / s. A pressure sensor is used to monitor the pressure generated by the gangue slurry during the two pumping rates. The monitoring results show the pressure of the slurry on the pipe wall at a flow rate of 1.85m / s under different standing times.

[0060] Optimized gangue particle size distribution table

[0061] Particle size range / mm Mass / g Mass ratio / % Cumulative proportion / % 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] The pressure of slurry on the pipe wall at a flow rate of 1.85m / s under different standing times

[0063]

[0064]

[0065] Substitute the pressure loss, flow rate and inner diameter of the pipe obtained when the slurry concentration is 68% and the slurry flow rate is 1.85m / s and 2.50m / s into the flow resistance to calculate the following formula:

[0066]

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

[0068] By combining the two sets of data calculation formulas when the flow rates are 1.85m / s and 2.50m / s respectively, the viscosity coefficient and yield stress of pure gangue slurry at the two flow rates can be solved. The results are shown in the rheological parameter table of slurry at different standing times.

[0069] Rheological parameters of slurry at different standing times

[0070] Standing 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] Substituting the viscosity coefficient and yield stress of pure gangue slurry at different standing time periods shown in the rheological parameter table of slurry at different standing time into the calculation formula, the estimation formula of the resistance along the way of pure gangue slurry at different standing time periods can be obtained. According to the actual filling pipeline specifications, the long-distance transportation conditions with an inner diameter of 175 mm and a pipeline length of 10 km are selected to obtain the total resistance results of pure gangue slurry at different standing time periods, as shown in the following figure: Figure 2 As shown, the total resistance is the minimum value of the pumping pressure required for actual filling. According to the results shown in the preferred gangue particle size distribution table, when the pure gangue slurry is left standing in the pipeline for 72 hours, the total resistance of the pure gangue slurry in a 10km long pipeline is 18.46MPa. The rated pumping pressure given above is 20MPa, which can ensure the normal pumping of the pure gangue slurry. After the standing time exceeds 72 hours, the total resistance is greater than the rated pumping pressure of 20MPa, and the pure gangue slurry cannot be pumped normally.

[0072] Therefore, in implementing the technology of long-distance conveying of gangue slurry with a washing-free pipe provided by the present invention, pure gangue slurry should be prepared according to the gangue grading preferably obtained according to the present invention, and the standing time should be within 72 hours. Standing for 72 hours can meet the needs of routine maintenance, interruption, stagnation, filling process adjustment, etc. of the filling system, and there is no need to clean the pipeline, which effectively realizes the purpose of long-distance conveying of gangue slurry with a washing-free pipe, simplifies the filling process, improves the filling efficiency, and avoids the problem of pipe blockage caused by the filling suspension process.

[0073] Compared with the prior art, the present invention, through the preferred configuration of pure gangue slurry with the advantages of small sedimentation, low segregation rate and weak consolidation, can effectively achieve the direct satisfaction of material transportation needs after the material conveying pipeline has been left standing for 72 hours, avoiding the blockage caused by the need for the gangue slurry to stand in the pipeline for 72 hours, and thereby meeting the needs of routine maintenance, interruption, stagnation, filling process adjustment, etc. of the filling system, without the need to clean the pipeline, effectively achieving the purpose of long-distance transportation of gangue slurry without pipe cleaning, simplifying the filling process, improving the filling efficiency, and avoiding the pipe blockage problem caused by the filling suspension process.

[0074] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A long-distance non-washing pipeline system for conveying gangue slurry, comprising a material conveying pipe and a material pumping system, wherein the material conveying pipe is connected to the material pumping system, and characterized in that: At least one anti-sinking pumping mechanism is further arranged on the material conveying pipe, and the anti-sinking pumping mechanism is located between two adjacent material conveying pipes, and the two adjacent material conveying pipes are connected to each other through the anti-sinking pumping mechanism, and the anti-sinking pumping mechanism includes an inner liner pipe, a jacket pipe, a guide plate, a diverter pipe, a jet port, a booster pump group, a multi-way valve and a modified reserved slurry, wherein the rear end face of the inner liner pipe is connected to the material conveying pipe located on one side close to the material pumping system through a flange and is coaxially distributed, and at the same time, the front end face of the inner liner pipe is embedded in the material conveying pipe located on the far side The outer diameter of the front end face of the liner pipe is not greater than 80% of the inner diameter of the material conveying pipe. The jacket pipe is covered outside the liner pipe and coaxially distributed with the liner pipe. The rear end face of the jacket pipe is connected with the rear end face of the liner pipe. The front end face is connected with the material conveying pipe far away from the material pumping system through a connecting flange. The inner side of the jacket pipe is connected with the liner pipe through a plurality of guide plates. The guide plates are evenly distributed around the axis of the liner pipe. The guide plate surface is 15°-60° with the axis of the jacket pipe. ° angle, the front half of the guide plate is located together with the front half of the liner pipe in the material conveying pipe away from the material pumping system, and the upper end surface of the guide plate is abutted against and slidably connected to the inner side surface of the material conveying pipe. In the guide plate, a laser groove is formed between two adjacent guide plates, and a jet port is arranged at the rear end surface of the laser groove. The axis of the jet port is coaxially distributed with the laser groove. At the same time, the jet ports are connected in parallel and are connected to the shunt pipe through the guide pipe respectively. The shunt pipe is connected to the outer surface of the jacket pipe and is coaxial with the jacket pipe. The arc-shaped structure is distributed, and the diverter pipe is connected with the booster pump group through the guide pipe. The booster pump group is located outside the jacket 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 close to the material pumping system through the guide pipe. Among the material conveying pipes, each material conveying pipe is provided with at least one diverter port, and the diverter 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 of the material conveying pipes.

2. The long-distance and non-washing pipeline system for conveying gangue slurry according to claim 1 is characterized in that: The booster pump group includes a bearing base, a jet pump, an air compressor and a drive circuit, wherein the bearing base is a plate-like structure with a rectangular cross-section, the jet pump and the air compressor are each one and are connected to the upper end surface of the bearing base, the jet pump and the air compressor are connected in parallel with each other, and the output ends of the jet pump and the air compressor are connected to the multi-way valve through a guide tube, and are connected to the diversion pipe through the multi-way valve; at the same time, the input ends of the jet pump and the air compressor are connected to the multi-way valve through the guide tube, and the input end of the air compressor is connected to the external air environment through the multi-way valve, the jet pump is connected to the diversion port of the material conveying pipe through the multi-way valve, the drive circuit is connected to the outer surface of the bearing base, and is electrically connected to the jet pump, the air compressor and the multi-way valve respectively.

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

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

5. The long-distance and non-washing pipeline system for conveying gangue slurry according to claim 1 is characterized in that: The guide plate is a plate-like structure of either a rectangle or an arc shape, and its plate surface is vertically distributed with the walls of the liner pipe and the casing pipe. The guide plate includes a hard guide section, an elastic adjustment section and an elastic sealing strip, wherein the elastic adjustment section is located together with the front half of the liner pipe in a material conveying pipe away from the material pumping system, and an elastic sealing strip is provided on the upper end face and the lower end face of the elastic adjustment section, and the elastic sealing strip is respectively used to abut and slide against the outer side surface of the liner pipe and the inner side surface of the casing pipe, the rear end face of the elastic adjustment section is located outside the material conveying pipe and is connected to the front end face of the hard guide section, the lower end face of the hard guide section is connected to the outer side surface of the liner pipe by bolts, and at the same time, the upper end face of the hard guide section is abutted against and slide-connected to the inner side surface of the casing pipe.

6. The long-distance and non-washing pipeline system for conveying gangue slurry according to claim 5 is characterized in that: The elastic adjustment section and the hard guide section are slidably connected to each other through a slide groove, and the slide groove is embedded in the front end surface of the hard guide section. The cross section of the elastic adjustment section is an inverted right-angled trapezoidal structure, and the width of its upper end surface is 1.5-3 times the width of the lower end surface.

7. The long-distance and non-washing pipeline system for conveying gangue slurry according to claim 1 is characterized in that: The modified reserved slurry is located in the material conveying pipe in front of the inner lining pipe and the jacket pipe of the anti-sinking pumping mechanism.

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

9. A method for using a long-distance gangue slurry transportation non-washing pipeline system according to claim 1, characterized in that: The method for using the long-distance gangue slurry transportation non-washing pipeline system comprises the following steps: S1, system layout, according to the material conveying distance and direction, the material conveying pipe, material pumping system and anti-sinking pumping mechanism are laid out to form at least one material conveying pipeline, and each material conveying pipeline is provided with at least one anti-sinking pumping mechanism, and at the same time, a modified reserved slurry is preset 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-sinking pumping mechanism; S2, material transportation. Material transportation can be carried out after completing step S1. During material transportation, the channel pressure value and flow value when the material and anti-sinking pumping mechanism are in operation are first calculated according to the flow resistance calculation function. Then, the material pumping system and the anti-sinking pumping mechanism are driven to operate at the same time according to the calculation results to realize the material transportation operation. At the same time, after completing the material transportation operation, the modified reserved slurry is injected into the conveying pipeline again through the material pumping system to complete the material transportation and realize the equipment preset for subsequent material transportation.

10. A method for using a long-distance gangue slurry transport non-washing pipeline system according to claim 9, characterized in that: The flow resistance calculation function in step S2 is: Where: τ0 is the yield stress, Pa; η is the viscosity coefficient, Pa·s; D is the pipe diameter, m; V is the fluid flow rate, m / s; At the same time, the time interval between two adjacent material transportations shall not exceed 72 hours.

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