A multi-point on-demand uninterrupted feed distribution device for a thickener underflow

Abstract

The utility model relates to tailing shunting technical field, specifically disclose thickener underflow multi -point on -demand uninterrupted feeding distribution device, including thickener, the thickener is used for the thickening of all tailings slurry produced in mineral separation, its bottom is provided with underflow sand pipe, is used for conveying the thickened tailings, underflow slag slurry pump, its import is connected with underflow sand pipe through pipeline, a delivery main pipe is connected in the outlet of underflow slag slurry pump, one or more delivery branch pipes, the utility model discloses a underflow slag slurry pump cooperation delivery main pipe utilizes multichannel delivery branch pipe, and the tailing material is delivered, replaces the mode that traditional is each required point independent configuration a set of pump pipe system, reduces the quantity and the supporting pipeline of slag slurry pump, alleviates the present situation that thickener bottom equipment is crowded, improves the operation and the maintenance space, reduces the potential safety hazard, directly reduces equipment investment and the later maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of tailings diversion technology, specifically a multi-point on-demand uninterrupted feeding and distribution device for thickener bottom flow. Background Technology

[0002] In surface backfill preparation plants, thickeners are key concentrators, used to increase the concentration of the tailings slurry from 20%-40% to 65%-75%, suitable for preparing paste-like backfill slurries. The concentrated underflow needs to be pumped and piped to multiple points of demand, such as different mixing equipment or buffer silos, to meet the needs of underground backfilling operations in mines. Therefore, the thickener underflow delivery system needs to have the ability to flexibly distribute slurry to multiple points.

[0003] Currently, the conventional technical solution in this field adopts a "point-to-point" conveying mode. That is, a separate conveying line consisting of a slurry pump and dedicated pipeline is configured for each material-requiring point. When material needs to be supplied to a certain point, the corresponding thickener bottom flow sand discharge valve and slurry pump are opened; after the material supply stops, the sand discharge valve must be closed, and the entire pumping pipeline must be flushed with clean water to prevent pipeline blockage.

[0004] This traditional conveying mode has significant drawbacks: First, when there are many material supply points, multiple slurry pumps and a large number of pipelines need to be installed at the bottom of the thickener, making the area crowded and difficult to arrange equipment. This not only increases initial investment and operating costs but also poses safety hazards for equipment maintenance and personnel operation. Second, the various conveying lines are independent of each other and cannot work in coordination, making it difficult to achieve real-time and flexible allocation of underflow according to production needs. A more prominent problem is that every time the material supply point is switched or the supply is stopped, the entire conveying line must be shut down and thoroughly cleaned. This process introduces a large amount of flushing water, which enters the filling slurry preparation process and degrades the quality of the filling material.

[0005] To overcome the aforementioned shortcomings, some improvement schemes attempt to merge lines using valve groups to reduce the number of slurry pumps. However, such improvement schemes do not fundamentally solve the problem. When switching feed points, the conveying system still needs to complete the cleaning operation of the current line first, making real-time switching without stopping the system. At the same time, a single slurry pump still cannot supply material to multiple demand points simultaneously, resulting in low system efficiency. Moreover, for demand points with significantly different conveying parameters (such as flow rate and head), this scheme is difficult to achieve sharing, leading to persistent problems of equipment redundancy and high costs. Based on this, this application provides a multi-point on-demand uninterrupted material supply and distribution device for thickener underflow. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a multi-point, on-demand, uninterrupted material supply and distribution device for thickener underflow, solving the problem of real-time switching without shutting down the system, which is impossible in existing technologies. Furthermore, a single slurry pump still cannot supply material to multiple demand points simultaneously, resulting in low system efficiency.

[0007] The present invention relates to a thickener underflow multi-point on-demand uninterrupted feeding and distribution device, comprising a thickener, wherein the thickener is used to concentrate the total tailings slurry produced by mineral processing, and an underflow sand discharge pipe is provided at its bottom for conveying the concentrated tailings. The underflow slurry pump has its inlet connected to the underflow sand discharge pipe via a pipeline. A main conveying pipe is connected to the outlet of the underflow slurry pump; One or more conveying branch pipes, wherein the inlet end of the conveying branch pipe is connected to the main conveying pipe through a branch pipe valve, and the outlet end leads to different material demand points; A high-pressure flushing water system, the outlet of which is connected to the main delivery pipe and / or each of the aforementioned delivery branch pipes; The control system is electrically connected to the underflow slurry pump, branch valves, and high-pressure flushing water system, and is used to control the delivery of underflow slurry to one or more material-requiring points and the cleaning of pipelines.

[0008] Each of the aforementioned delivery branch pipes is equipped with a flow meter and an electric clamp valve, both of which are electrically connected to the control system.

[0009] As a further improvement of this utility model, the high-pressure flushing water system includes a clean water pump, an electric ball valve, and a check valve, with their outlets connected between the inlet of the underflow slurry pump and the main conveying pipe, as well as to the positions of the branch pipe valves on each conveying branch pipe.

[0010] As a further improvement of this utility model, an electric gate valve for overall control is provided on the pipeline between the underflow sand discharge pipe and the underflow slurry pump inlet.

[0011] As a further improvement of this utility model, the conveying end of the underflow slurry pump is provided with a four-point valve. The four-point valve includes a valve body, an inner cavity is opened on the inner side of the valve body, and a dispersion component is installed thereon. One or more output ports are provided on the outer side of the valve body and are respectively connected to the conveying branch pipe.

[0012] As a further improvement of this utility model, an electromagnetic control component is provided in the middle of the valve body for controlling the opening and closing of the valve body. An arc-shaped plate is provided in the inner cavity of the valve body at each output port for guiding the conveyed material.

[0013] As a further improvement of this utility model, the dispersing component includes an impeller, the middle part of which is installed in the middle of the valve body and passes through the bottom of the inner cavity via a power output shaft, and is connected to a power component for driving the impeller to rotate.

[0014] As a further improvement of this utility model, a cover plate is installed above the impeller at the power output shaft, which is used to position the impeller in conjunction with the top of the inner cavity of the valve body.

[0015] As a further improvement of this utility model, the thickener is provided with a flow guide port at the bottom, which is adapted to the underflow slurry pump through a pipe, and a flushing pipe is provided on the outside, which is used to transport clean water to flush the bottom of the thickener.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a bottom-flow slurry pump in conjunction with a main conveying pipe and multiple conveying branch pipes to transport tailings materials, replacing the traditional mode of configuring a separate pump and pipeline system for each material demand point. This reduces the number of slurry pumps and supporting pipelines, alleviates the current situation of congestion at the bottom of the thickener, improves the operation and maintenance space, reduces safety hazards, and directly reduces equipment investment and subsequent maintenance costs. Furthermore, when it is necessary to stop supplying material to a certain point, the system can precisely flush only the delivery branch pipe where that point is located, while the main pump and main pipeline can continue to supply material to other points normally, improving the continuity and efficiency of the filling operation, and avoiding frequent pump start-ups and shutdowns and large amounts of flushing water entering the process. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the distribution and conveying process of this utility model; Figure 2 This is a bottom view schematic diagram of the combination of the thickener and the four-quarter valve of this utility model; Figure 3 This is a schematic diagram of the combined structure of the four-point valve and the delivery branch pipe of this utility model; Figure 4 This is a schematic cross-sectional view of the thickener structure of this utility model; Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the internal structure of the four-point valve of this utility model.

[0018] In the diagram: 1. Underflow sand discharge pipe; 2. Electric gate valve; 3. Underflow slurry pump; 4. High-pressure flushing water system; 5. Main conveying pipe; 6. First conveying branch pipe; 7. First material demand point; 8. High-pressure flushing water system; 9. Second conveying branch pipe; 10. Second material demand point; 11. High-pressure flushing water system; 12. Third conveying branch pipe; 13. Third material demand point; 14. High-pressure flushing water system; 15. First electric gate valve; 16. Second electric gate valve; 17. Third electric gate valve; 18. First flow meter; 19. First electric pinch valve; 20. Second flow meter; 21. Second electric pinch valve; 22. Third flow meter; 23. Third electric pinch valve; 24. Control system; 25. Thickener; 26. Quarter valve; 27. Flushing pipe; 28. Guide port; 29. ​​Dispersion assembly; 261. Valve body; 262. Inner cavity; 263. Arc-shaped plate; 264. Output port; 291. Impeller; 292. Power output shaft; 293. Cover plate. Detailed Implementation

[0019] The following illustrations will reveal several embodiments of the present invention. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these physical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and components will be shown in a simple schematic manner in the illustrations.

[0020] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 4 The thickener 25 is used to thicken the tailings slurry produced by mineral processing, and the underflow discharge pipe 1 at its bottom is used to discharge high-concentration tailings slurry with a concentration of about 65% to 75%. An electric gate valve 2 is installed on the underflow discharge pipe 1 near the inlet of the underflow slurry pump 3 to control the flow of underflow slurry into the pump body.

[0022] The selection of the underflow slurry pump 3 is based on the most demanding operating condition, considering the maximum total flow rate that may be simultaneously required by all material-consuming points and the required conveying head. For example, if the system needs to supply material to two material-consuming points simultaneously, with design flow rates of 60 cubic meters per hour and 80 cubic meters per hour respectively, then the rated flow rate of the underflow slurry pump 3 must be greater than 140 cubic meters per hour. Its head must also meet the requirements of the material-consuming point with the longest conveying distance or the highest lifting height.

[0023] The main conveying pipe 5 is fixedly connected to the outlet of the underflow slurry pump 3, responsible for pressurized conveying of high-concentration slurry from the pump. Several branch conveying pipes branch off from the main conveying pipe 5, such as the first branch conveying pipe 6, the second branch conveying pipe 9, and the third branch conveying pipe 12. The inlet end of each branch conveying pipe is connected to the main conveying pipe 5 via a branch valve. These branch valves are specifically electric gate valves, including the first electric gate valve 15, the second electric gate valve 16, and the third electric gate valve 17. The outlet end of each branch conveying pipe is connected to different material demand points; for example, the first material demand point 7 is a mixing tank, the second material demand point 10 is another mixing tank, and the third material demand point 13 is a buffer sand bin.

[0024] Furthermore, the high-pressure flushing water system consists of multiple independent flushing units. The outlet of the first high-pressure flushing unit 4 is connected to the pipeline between the electric gate valve 2 and the inlet of the underflow slurry pump 3. The outlet of the second high-pressure flushing unit 8 is connected to the first conveying branch pipe 6 between the first electric gate valve 15 and the first material demand point 7. The third high-pressure flushing unit 11 and the fourth high-pressure flushing unit 14 are connected to the second delivery branch pipe 9 and the third delivery branch pipe 12 in the same manner, respectively. Each high-pressure flushing unit consists of an electric ball valve, a check valve to prevent backflow, and a delivery pipeline, with its pressurized water source coming from the plant's clean water pump station. The head of this clean water pump is set to 120% to 150% of the selected head of the underflow slurry pump 3 to ensure that the flushing water has sufficient kinetic energy to flush away the sediment slurry in the pipeline.

[0025] Furthermore, on each conveying branch pipe, between the branch pipe valve and the material demand point, a flow meter for monitoring flow velocity and an electric clamp valve for adjusting flow rate are installed. Specifically, a first flow meter 18 and a first electric clamp valve 19 are installed on the first conveying branch pipe 6; a second flow meter 20 and a second electric clamp valve 21 are installed on the second conveying branch pipe 9; and a third flow meter 22 and a third electric clamp valve 23 are installed on the third conveying branch pipe 12.

[0026] Furthermore, the control system 24 is connected to all the aforementioned electrical equipment via control cables, including the electric gate valve 2, the motor of the underflow slurry pump 3, the electric gate valves on each branch pipe, the electric ball valves of each high-pressure flushing unit, and the electric clamp valves and flow meters on each branch pipe. The system receives real-time data from the flow meters and, based on this data and operator instructions, controls the flow rate to each required material point to remain stable at the set value by adjusting the operating frequency of the motor of the underflow slurry pump 3 and the opening degree of the corresponding electric clamp valve.

[0027] The device achieves two operating modes through the control system 24.

[0028] The first method involves supplying material to a single point of demand. For example, when only the third point of demand, 13, needs to be supplied, the control system 24 opens the electric gate valve 2 and the third electric gate valve 17, starts the underflow slurry pump 3, and simultaneously closes the first electric gate valve 15 and the second electric gate valve 16. By adjusting the pump frequency and the opening of the third electric clamp valve 23, the flow rate displayed by the third flow meter 22 is made to meet the requirements.

[0029] The second method involves simultaneously supplying material to multiple demand points. For example, when simultaneously supplying material to the first demand point 7 and the second demand point 10, the control system 24, in addition to opening the electric gate valve 2 and the underflow slurry pump 3, simultaneously opens the first electric gate valve 15 and the second electric gate valve 16, and closes the third electric gate valve 17. Then, the system comprehensively adjusts the total output of the underflow slurry pump 3, and finely adjusts the opening of the first electric clamp valve 19 and the second electric clamp valve 21, so that the readings of the first flow meter 18 and the second flow meter 20 are stabilized at their respective set flow rates.

[0030] When it is necessary to stop supplying material to a material demand point that is currently supplying material, while other material demand points still need to continue supplying material, the device can achieve uninterrupted switching. For example, when it is necessary to stop supplying material to the second material demand point 10 but continue supplying material to the first material demand point 7, the control system 24 performs the following steps: first, close the second electric gate valve 16 to cut off the slurry to the second material demand point 10. Subsequently, the second electric clamp valve 21 is opened to its maximum, and the electric ball valve of the associated third high-pressure flushing unit 11 is opened, using high-pressure clean water to flush the second delivery branch pipe 9 separately. Throughout this process, the underflow slurry pump 3 and the main delivery pipe 5 continue to supply material to the first material demand point 7 normally without being affected. The flushing operations of all pipelines can be completed independently by the corresponding high-pressure flushing unit, without relying on the underflow slurry pump 3 to deliver clean water.

[0031] In the underflow multi-point on-demand uninterrupted material supply and distribution device of the thickener 25, an electric gate valve 2 is installed on the connecting pipe between the underflow sand discharge pipe 1 at the bottom of the thickener 25 and the inlet of the underflow slurry pump 3. The electric gate valve 2 serves as the main control valve of the system, and its opening and closing directly control the material flow of the entire underflow conveying system.

[0032] At the outlet conveying end of the underflow slurry pump 3, a four-quarter valve 26 is connected, and an electromagnetic control component is installed in the middle to control the opening and closing of the four-quarter valve 26. The main body of the four-quarter valve 26 is a valve body 261, and a cylindrical inner cavity 262 is machined inside the valve body 261. Four outlet ports 264 are evenly arranged around the outer wall of the valve body 261. In practical applications, depending on the number of material demand points, three of the outlet ports 264 can be selectively used and connected to the first conveying branch pipe 6, the second conveying branch pipe 9, and the third conveying branch pipe 12 respectively through flanges. The remaining outlet port 264 is used in combination with the underflow slurry pump 3 to facilitate material conveying.

[0033] Please see Figure 4 , Figure 5 In order to smoothly guide the pumped slurry to different output ports 264, an arc-shaped plate 263 is fixedly installed on the side wall of the inner cavity 262 of the valve body 261, corresponding to the inlet of each output port 264. The curved shape of the arc-shaped plate 263 naturally transitions with the wall of the inner cavity 262. Its function is to reduce the sudden change in the flow direction of the slurry, reduce the impact on the structure of the valve body 261 and the possibility of material deposition.

[0034] A dispersion assembly 29 is installed at the center of the inner cavity 262 of the valve body 261; Specifically, there is an impeller 291, which is supported by a power output shaft 292 at its center. The power output shaft 292 passes downward through the mechanical seal at the bottom of the valve body 261 and is connected to an explosion-proof motor installed below the valve body 261. When the explosion-proof motor starts, it drives the impeller 291 to rotate. The blades of the impeller 291 are evenly distributed radially. Above the impeller 291, a circular cover plate 293 is fixedly installed at the upper end of the power output shaft 292. This plate plays an axial positioning role for the high-speed rotating impeller 291, suppressing its vertical movement and improving operational stability.

[0035] The working process is as follows: After the underflow slurry pump 3 pumps high-concentration slurry into the inner cavity 262 of the valve body 261 of the four-way valve 26, the explosion-proof motor is started, driving the impeller 291 to rotate. The rotating impeller 291 disperses the slurry flowing into the inner cavity 262 and imparts it with tangential velocity. Under the action of centrifugal force, the slurry is evenly thrown towards the peripheral wall of the inner cavity 262 of the valve body 261 and is transported out through the conveying branch pipes connected to each output port 264. By controlling the opening of the electric clamp valve on each conveying branch pipe, and combined with the homogenizing effect of the impeller 291 on the flow, the slurry can be relatively stably distributed to multiple material demand points. When it is necessary to stop supplying material to a certain material demand point, it is only necessary to close the electric gate valve on the corresponding conveying branch pipe.

[0036] Furthermore, the thickener 25 is provided with a guide port 28 at the bottom, which is adapted to the underflow slurry pump 3 through a pipe, and a flushing pipe 27 is provided on the outside. The flushing pipe 27 is used to transport clean water to flush the bottom of the thickener 25.

[0037] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A multi-point, on-demand, uninterrupted material supply and distribution device for thickener underflow, characterized in that, include: A thickener, wherein a bottom flow sand discharge pipe is provided at the bottom of the thickener for conveying concentrated tailings; The underflow slurry pump has its inlet connected to the underflow sand discharge pipe via a pipeline. A main conveying pipe is connected to the outlet of the underflow slurry pump; One or more conveying branch pipes, wherein the inlet end of the conveying branch pipe is connected to the main conveying pipe through a branch pipe valve, and the outlet end leads to different material demand points; A high-pressure flushing water system, the outlet of which is connected to the main delivery pipe and / or each of the aforementioned delivery branch pipes; The control system, which is electrically connected to the underflow slurry pump, branch valves, and high-pressure flushing water system, is used to control the delivery of underflow slurry to one or more material-requiring points and the cleaning of pipelines.

2. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 1, characterized in that: Each of the aforementioned delivery branch pipes is equipped with a flow meter and an electric clamp valve, both of which are electrically connected to the control system.

3. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 1, characterized in that: The high-pressure flushing water system includes a clean water pump, an electric ball valve, and a check valve. The outlet of the high-pressure flushing water system is connected between the inlet of the underflow slurry pump and the main conveying pipe, as well as to the positions of the branch pipe valves on each conveying branch pipe.

4. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 1, characterized in that: An electric gate valve for overall control is installed on the pipeline between the underflow sand discharge pipe and the underflow slurry pump inlet.

5. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 1, characterized in that: The underflow slurry pump is equipped with a four-point valve at its delivery end. The four-point valve includes a valve body, an inner cavity is opened on the inner side of the valve body and a dispersion component is installed thereon, and one or more output ports are provided on the outer side of the valve body and are respectively connected to the delivery branch pipe.

6. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 5, characterized in that: An electromagnetic control component is provided in the middle of the valve body to control the opening and closing of the valve body. An arc-shaped plate is provided in the inner cavity of the valve body at each output port to guide the conveyed material.

7. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 5, characterized in that: The dispersing component includes an impeller, the middle part of which is installed in the middle of the valve body and passes through the bottom of the inner cavity via a power output shaft, and is connected to a power component for driving the impeller to rotate.

8. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 7, characterized in that: A cover plate is installed above the impeller at the power output shaft to position the impeller in conjunction with the top of the valve body's inner cavity.

9. The thickener underflow multi-point on-demand uninterrupted feeding and distribution device according to claim 1, characterized in that: The thickener is provided with a flow guide port at the bottom, which is adapted to the underflow slurry pump through a pipe, and a flushing pipe is provided on the outside of the flow guide port. The flushing pipe is used to deliver clean water to flush the bottom of the thickener.

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