Automatic detection device for sand returning water of grader and control method of automatic detection device

Abstract

The invention relates to a grader sand return water automatic detection device which comprises two overflow pipes, an adjusting pipe between the two overflow pipes, a magnetic current power generation pipe at the tail ends of the overflow pipes and a power pipe, a liquid outlet of the overflow pipes is communicated with a liquid inlet of the magnetic current power generation pipe, and a liquid outlet of the magnetic current power generation pipe is communicated with a liquid inlet of the power pipe. The upper end and the lower end of the adjusting pipe are fixedly connected with the side walls of the two overflow pipes correspondingly, an impeller water pump is arranged in the power pipe, and when ore grinding slurry passes through the magnetic current power generation pipe, the concentration change of the ore grinding slurry is fed back to the electric energy change generated in unit time of the magnetic current power generation pipe to adjust the power of the electromagnet and the impeller water pump. On the other hand, the rate of pumping the ore grinding slurry by the impeller water pump is adjusted, so that the discharge rate of the concentration of the coarse ore grinding slurry and the fine ore grinding slurry is adjusted according to the change of the concentration of the coarse ore grinding slurry and the fine ore grinding slurry, and automatic detection and control of reverse sand water are realized.

Description

Technical Field

[0001] The invention belongs to the technical field of sorting, and in particular relates to an automatic detection device for returned sand water of a classifier and a control method thereof. Background Art

[0002] A classifier is a kind of equipment that uses the principle that solid particles have different specific gravities and therefore different sedimentation rates in liquids to perform mechanical classification. Classifiers are widely used in mineral processing plants to form a closed-loop cycle with ball mills to separate ore sand, or to classify ore sand and fine mud in gravity mineral processing plants, to perform particle size classification of ore pulp in metal mineral processing processes, and to perform desludging and dehydration operations in ore washing operations.

[0003] If the slurry particles are too large, useful minerals will be lost along with the waste rock, resulting in a waste of ore resources. Most of the lost ore is mixed in large pieces of waste rock, which is difficult to detect by sampling and testing. No matter the coarse-ground slurry or fine-ground slurry in the classifier, once it is not discharged in time, it will accumulate in the classifier, directly affecting the efficiency of subsequent diversion of ore sand. In order to discharge the coarse-ground slurry and fine-ground slurry from the classifier in time and maintain the working efficiency of the subsequent classifier, it is necessary to detect the coarse-ground slurry sunk in the bottom trough and the fine-ground slurry overflowing from the upper side, and adjust its discharge rate according to the output of the coarse-ground slurry and the fine-ground slurry.

[0004] In view of the above-mentioned existing technical problems, a method for detecting and controlling the returned sand water of a classifier is urgently needed. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a classifier return sand water automatic detection device and a control method thereof to solve the above problems.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: an automatic detection device for returned sand water of a classifier, comprising four parts: two overflow pipes, a regulating pipe between the two overflow pipes, a magnetic current generator tube and a power tube at the tail end of the overflow pipe. The discharge port of the overflow pipe is connected to the liquid inlet of the magnetic current generator tube, the discharge port of the magnetic current generator tube is connected to the liquid inlet of the power tube, and the upper and lower ends of the regulating pipe are fixedly connected to the side walls of the two overflow pipes respectively.

[0007] A partition is arranged inside the overflow pipe, and the partition is used to divide the internal cavity of the overflow pipe into two parts, namely, a liquid inlet chamber and a liquid discharge chamber. The liquid inlet chamber is connected with the liquid inlet port of the overflow pipe, and the liquid discharge chamber is connected with the liquid discharge port of the overflow pipe. A through hole is arranged on the partition to connect the liquid inlet chamber with the liquid discharge chamber. A flow limiting plug is arranged in the liquid inlet chamber. The flow limiting plug is a conical structure, and the tip of the flow limiting plug points to the through hole on the partition. A push-pull rod is fixed to the bottom end of the flow limiting plug, and the push-pull rod passes through the side wall of the overflow pipe and is inserted into the regulating pipe.

[0008] The regulating tube is provided with a first magnet block and an electromagnet. The first magnet block is fixed at the middle of the push-pull rod. The first magnet block is symmetrically provided with electromagnets at the upper and lower sides. The electromagnets are fixed at the outer side wall of the overflow tube.

[0009] Second magnet blocks are evenly distributed on the upper and lower sides of the inner wall of the magnetocurrent generator tube, and the second electromagnets located opposite to each other have opposite polarities, ensuring that closed magnetic flux lines are formed between the upper and lower second electromagnets. Two metal panels are arranged between the upper and lower second electromagnets, and the metal panels are respectively fixed on the front and rear sides of the magnetocurrent generator tube.

[0010] Preferably, an impeller water pump is provided in the power pipe.

[0011] Preferably, an adjusting sleeve is fixed to the side of the overflow pipe, a first push plate and a second push plate are arranged in the adjusting sleeve, an adjusting spring is arranged between the first push plate and the second push plate, one end of the adjusting spring is fixedly connected to the first push plate, and the other end of the adjusting spring is fixedly connected to the second push plate, an adjusting threaded rod is rotatably sleeved on the back side of the first push plate, the adjusting threaded rod is threadably connected to the adjusting sleeve, a knob is fixed to one end of the connecting threaded rod passing through the adjusting sleeve, an adjusting rod is fixed to the back side of the second push plate, the adjusting rod is inserted into the overflow pipe, and the other end of the adjusting rod is fixedly connected to the flow limiting plug.

[0012] Control method based on the above-mentioned classifier return sand water automatic detection device:

[0013] S1: The overflow pipe located at the top is a coarse slurry discharge pipe and is connected to the coarse grinding slurry discharge port of the classifier, and the overflow pipe located at the bottom is a fine slurry discharge pipe and is connected to the fine grinding slurry discharge port of the classifier;

[0014] S2: The ball mill grinds the coarsely ground ore slurry screened out in step S1 again, and then passes it into the classifier for further classification and screening;

[0015] S3: a magnetic separator performs magnetic separation and screening on the finely ground ore slurry screened out in step S1;

[0016] S4: When the coarsely ground ore slurry and the finely ground ore slurry pass through the corresponding magnetic current generator tubes, the ion flow formed by the charged ions in the slurry in the magnetic current generator tubes passes between the second magnet blocks and cuts the magnetic lines of force between the upper and lower second magnet blocks. Due to electromagnetic induction, an electric field is induced in the direction perpendicular to the magnetic field and flow rate. The slurry is connected to the electromagnet and impeller water pump as external loads through the metal panel as a carrier, and the energy in the slurry is directly converted into electrical energy.

[0017] S5: When the concentration of the coarsely ground ore slurry increases, the upper magnetic current generating tube provides electric energy to the upper electromagnet and the impeller water pump, and the power of the upper electromagnet increases. Under the action of the magnetic force between the upper electromagnet and the first magnet block, the two current limiting plugs are driven to slide downward through the push-pull rod, so that the distance between the upper electromagnet and the first magnet block 7 increases until the forces of the two electromagnets acting on the first magnet block are balanced, the gap between the through hole on the baffle plate in the upper overflow pipe and the plug increases, and the power of the upper impeller water pump increases, thereby accelerating the discharge rate of the coarsely ground ore slurry;

[0018] S6: During the S5 process, the electric energy provided by the lower magnetic flow generating tube to the lower electromagnet and impeller water pump is reduced, so that the distance between the lower electromagnet and the first magnet block becomes smaller until the forces acting on the first magnet block by the two electromagnets are balanced, the gap between the through hole on the baffle plate in the lower overflow pipe and the plug becomes smaller, and the power of the lower impeller water pump is increased, thereby reducing the discharge rate of the finely ground ore slurry.

[0019] The beneficial effects of the present invention are as follows: the present invention generates electricity by the grinding slurry passing through the magnetic flow generator tube, and uses the change in the grinding slurry concentration to cause the change in the power generation to adjust the power of the electromagnet and the impeller water pump, and then when the concentrations of the coarse grinding slurry and the fine grinding slurry change, the discharge rate is adjusted. In summary, when the grinding slurry passes through the magnetic flow generator tube, the change in the grinding slurry concentration is fed back to the change in the electric energy generated per unit time by the magnetic flow generator tube to adjust the power of the electromagnet and the impeller water pump, on the one hand, the position of the current limiting plug is adjusted, and on the other hand, the rate at which the impeller water pump extracts the grinding slurry is adjusted, and then the discharge rate of the coarse grinding slurry and the fine grinding slurry concentration is adjusted according to the change in the concentration of the coarse grinding slurry and the fine grinding slurry, thereby realizing automatic detection and control of back sand water. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Main structure of the return sand water detection device Figure 1 ;

[0021] Figure 2 This is the internal structure diagram of the overflow pipe;

[0022] Figure 3 This is the internal structure diagram of the regulating tube;

[0023] Figure 4 This is the internal structure diagram of the magnetofluid generator;

[0024] Figure 5 This is the internal structure diagram of the power tube;

[0025] Figure 6 Main structure of the return sand water detection device Figure 2 ;

[0026] Figure 7This is a diagram of the internal structure of the adjustment sleeve;

[0027] Numbers in the figure: 1 overflow pipe; 101 partition; 102 liquid inlet chamber; 103 liquid discharge chamber; 2 adjusting pipe; 3 magnetic flow generating tube; 4 power tube; 5 current limiting plug; 6 push-pull rod; 7 first magnet block; 8 electromagnet; 9 second magnet block; 10 metal panel; 11 impeller water pump; 12 adjusting sleeve; 13 first push plate; 14 second push plate; 15 adjusting spring; 16 adjusting threaded rod; 17 knob; 18 adjusting rod. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0029] Embodiment 1: Figure 1-5 As shown, an automatic detection device for returned sand water of a classifier comprises four parts: two overflow pipes 1, a regulating pipe 2 between the two overflow pipes 1, a magnetic current generating tube 3 at the tail end of the overflow pipe 1, and a power tube 4. The discharge port of the overflow pipe 1 is connected with the liquid inlet of the magnetic current generating tube 3, the discharge port of the magnetic current generating tube 3 is connected with the liquid inlet of the power tube 4, and the upper and lower ends of the regulating pipe 2 are fixedly connected with the side walls of the two overflow pipes 1 respectively.

[0030] In this embodiment, a partition 101 is provided inside the overflow pipe 1, and the partition 101 is used to divide the internal cavity of the overflow pipe 1 into two parts, namely a liquid inlet chamber 102 and a liquid discharge chamber 103, wherein the liquid inlet chamber 102 is connected with the liquid inlet port of the overflow pipe 1, and the liquid discharge chamber 103 is connected with the liquid discharge port of the overflow pipe. A through hole is provided on the partition 101 to connect the liquid inlet chamber 102 with the liquid discharge chamber 103, and a flow limiting plug 5 is provided in the liquid inlet chamber 102. The flow limiting plug 5 is a conical structure, and the tip of the flow limiting plug 5 points to the through hole on the partition 101. A push-pull rod 6 is fixed to the bottom end of the flow limiting plug 5, and the push-pull rod 6 passes through the side wall of the overflow pipe 1 and is inserted into the regulating pipe 2.

[0031] In this embodiment, a first magnet block 7 and an electromagnet 8 are arranged in the regulating tube 2. The first magnet block 7 is fixed in the middle of the push-pull rod 6. Electromagnets 8 are symmetrically arranged on the upper and lower sides of the first magnet block 7. The electromagnets 8 are fixed on the outer wall of the overflow tube 1.

[0032] In this embodiment, second magnet blocks 9 are evenly distributed on the upper and lower sides of the inner wall of the magnetocurrent generator tube 3, and the second electromagnets 9 located opposite to each other have opposite polarities, ensuring that closed magnetic flux lines are formed between the upper and lower second electromagnets 9. Two metal panels 10 are arranged between the upper and lower second electromagnets 9, and the metal panels 10 are respectively fixed on the front and rear sides of the magnetocurrent generator tube 3.

[0033] In this embodiment, an impeller water pump 11 is disposed in the power pipe 4 .

[0034] In this embodiment, the control method based on the above-mentioned classifier return sand water automatic detection device is as follows:

[0035] S1: The overflow pipe 1 located at the top is a coarse slurry discharge pipe and is connected to the coarse grinding slurry discharge port of the classifier, and the overflow pipe 1 located at the bottom is a fine slurry discharge pipe and is connected to the fine grinding slurry discharge port of the classifier;

[0036] S2: The ball mill grinds the coarsely ground ore slurry screened out in step S1 again, and then passes it into the classifier for further classification and screening;

[0037] S3: a magnetic separator performs magnetic separation and screening on the finely ground ore slurry screened out in step S1;

[0038] S4: When the coarsely ground ore slurry and the finely ground ore slurry pass through the corresponding magnetic current generating tube 3, the ion flow formed by the charged ions in the slurry in the magnetic current generating tube 3 passes between the second magnet blocks 9 and cuts the magnetic lines of force between the upper and lower second magnet blocks 9. Due to electromagnetic induction, an electric field is induced in the direction perpendicular to the magnetic field and the flow velocity. The slurry is connected to the electromagnet and the impeller water pump as the external load through the metal panel 10 as a carrier, and the energy in the slurry is directly converted into electrical energy.

[0039] S5: When the grinding concentration in the coarsely ground ore slurry becomes higher, the upper magnetic current generating tube 3 provides electric energy to the upper electromagnet 8 and the impeller water pump 11, and the power of the upper electromagnet 8 increases. Under the action of the magnetic force between the upper electromagnet 8 and the first magnet block 7, the two current limiting plugs 5 are driven to slide downward through the push-pull rod 6, so that the distance between the upper electromagnet 8 and the first magnet block 7 increases until the forces of the two electromagnets 8 acting on the first magnet block 7 are balanced, and the gap between the through hole on the inner partition 101 of the upper overflow pipe 1 and the plug 5 increases, and the power of the upper impeller water pump 11 increases, thereby accelerating the discharge rate of the coarsely ground ore slurry;

[0040] S6: During the S5 process, the electric energy provided by the lower magnetic current generating tube 3 to the lower electromagnet 8 and the impeller water pump 11 is reduced, so that the distance between the lower electromagnet 8 and the first magnet block 7 is reduced until the forces of the two electromagnets 8 acting on the first magnet block 7 are balanced, the gap between the through hole on the inner partition 101 of the lower overflow pipe 1 and the plug 5 is reduced, and the power of the lower impeller water pump 11 is increased, thereby reducing the discharge rate of the finely ground ore slurry;

[0041] Similarly, when the grinding concentration in the fine grinding slurry becomes higher, the discharge rate of the coarse grinding slurry is accelerated and the discharge rate of the fine grinding slurry is reduced;

[0042] In summary, when the grinding slurry passes through the magnetic current generator tube 3, the change in the grinding slurry concentration is fed back to the change in the electric energy generated per unit time by the magnetic current generator tube 3 to adjust the power of the electromagnet 8 and the impeller water pump 11. On the one hand, the position of the current limiting plug 5 is adjusted, and on the other hand, the rate at which the impeller water pump 11 extracts the grinding slurry is adjusted. Then, according to the change in the concentration of the coarse grinding slurry and the fine grinding slurry, the discharge rate of the coarse grinding slurry and the fine grinding slurry concentration is adjusted to realize automatic detection and control of the back sand water.

[0043] Embodiment 2: Figure 6-7 As shown, on the basis of Example 1, an adjusting sleeve 12 is fixed to the side of the overflow pipe 1, and a first push plate 13 and a second push plate 14 are arranged in the adjusting sleeve 12, and an adjusting spring 15 is arranged between the first push plate 13 and the second push plate 14, one end of the adjusting spring 15 is fixedly connected to the first push plate 13, and the other end of the adjusting spring 15 is fixedly connected to the second push plate 14, and an adjusting threaded rod 16 is rotatably sleeved on the back side of the first push plate 13, and the adjusting threaded rod 16 is threadedly connected to the adjusting sleeve 12, and a knob 17 is fixed to one end of the connecting threaded rod 16 that passes through the adjusting sleeve 12, and an adjusting rod 18 is fixed to the back side of the second push plate 14, and the adjusting rod 18 is inserted into the overflow pipe 1, and the other end of the adjusting rod 18 is fixedly connected to the flow limiting plug 5.

[0044] In this embodiment, the distance between the first push plate 13 and the second push plate 14 is adjusted by rotating the knob 17 to adjust the compression degree of the adjusting spring 15, thereby adjusting the size of the external force acting on the flow limiting plug 5, adjusting the discharge rate ratio of the coarsely ground ore slurry and the finely ground ore slurry, and then adjusting the amount of backsand water of the classifier.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic detection device for sand return water of a classifier, comprising two overflow pipes, a regulating pipe between the two overflow pipes, a magnetic current generating pipe at the tail end of the overflow pipe, and a power pipe. The discharge port of the overflow pipe is connected to the liquid inlet of the magnetic current generating pipe, the discharge port of the magnetic current generating pipe is connected to the liquid inlet of the power pipe, and the upper and lower ends of the regulating pipe are fixedly connected to the side walls of the two overflow pipes respectively, characterized in that: A partition is arranged inside the overflow pipe, wherein the liquid inlet chamber is connected with the liquid inlet port of the overflow pipe, and the liquid discharge chamber is connected with the liquid discharge port of the overflow pipe. A through hole is arranged on the partition to connect the liquid inlet chamber with the liquid discharge chamber. A flow limiting plug is arranged in the liquid inlet chamber. The flow limiting plug is a conical structure, and the tip of the flow limiting plug points to the through hole on the partition. A push-pull rod is fixed to the bottom end of the flow limiting plug. The push-pull rod passes through the side wall of the overflow pipe and is inserted into the regulating pipe.

2. The automatic detection device for returned sand water of a classifier according to claim 1, characterized in that: The regulating tube is provided with a first magnet block and an electromagnet. The first magnet block is fixed at the middle of the push-pull rod. Electromagnets are symmetrically arranged on the upper and lower sides of the first magnet block. The electromagnets are fixed on the outer side wall of the overflow tube.

3. The automatic detection device for returned sand water of a classifier according to claim 1, characterized in that: Second magnet blocks are evenly distributed on the upper and lower sides of the inner wall of the magnetocurrent generator tube, and the second electromagnets located opposite to each other have opposite polarities, ensuring that closed magnetic flux lines are formed between the upper and lower second electromagnets. Two metal panels are arranged between the upper and lower second electromagnets, and the metal panels are respectively fixed on the front and rear sides of the magnetocurrent generator tube.

4. The automatic detection device for returned sand water of a classifier according to claim 1, characterized in that: An impeller water pump is arranged in the power pipe.

5. The automatic detection device for returned sand water of a classifier according to claim 1, characterized in that: An adjusting sleeve is fixed to the side of the overflow pipe, a first push plate and a second push plate are arranged in the adjusting sleeve, an adjusting spring is arranged between the first push plate and the second push plate, one end of the adjusting spring is fixedly connected to the first push plate, and the other end of the adjusting spring is fixedly connected to the second push plate, an adjusting threaded rod is rotatably sleeved on the back side of the first push plate, the adjusting threaded rod is threadedly connected to the adjusting sleeve, a knob is fixed on one end of the connecting threaded rod passing through the adjusting sleeve, an adjusting rod is fixed on the back side of the second push plate, the adjusting rod is inserted into the overflow pipe, and the other end of the adjusting rod is fixedly connected to the flow limiting plug.

6. A control method for a classifier sand return water automatic detection device, wherein the classifier sand return water automatic detection device is the classifier sand return water automatic detection device according to any one of claims 1 to 5, and the control method comprises the following steps: S1: The overflow pipe located at the top is a coarse slurry discharge pipe and is connected to the coarse grinding slurry discharge port of the classifier, and the overflow pipe located at the bottom is a fine slurry discharge pipe and is connected to the fine grinding slurry discharge port of the classifier; S2: The ball mill grinds the coarsely ground ore slurry screened out in step S1 again, and then passes it into the classifier for further classification and screening; S3: a magnetic separator performs magnetic separation and screening on the finely ground ore slurry screened out in step S1; S4: When the coarsely ground ore slurry and the finely ground ore slurry pass through the corresponding magnetic current generator tubes, the ion flow formed by the charged ions in the slurry in the magnetic current generator tubes passes between the second magnet blocks and cuts the magnetic lines of force between the upper and lower second magnet blocks. Due to electromagnetic induction, an electric field is induced in the direction perpendicular to the magnetic field and flow rate. The slurry is connected to the electromagnet and impeller water pump as external loads through the metal panel as a carrier, and the energy in the slurry is directly converted into electrical energy. S5: When the concentration of the coarsely ground ore slurry increases, the upper magnetic current generating tube provides electric energy to the upper electromagnet and the impeller water pump, and the power of the upper electromagnet increases. Under the action of the magnetic force between the upper electromagnet and the first magnet block, the two current limiting plugs are driven to slide downward through the push-pull rod, so that the distance between the upper electromagnet and the first magnet block 7 increases until the forces of the two electromagnets acting on the first magnet block are balanced, the gap between the through hole on the baffle plate in the upper overflow pipe and the plug increases, and the power of the upper impeller water pump increases, thereby accelerating the discharge rate of the coarsely ground ore slurry; S6: During the S5 process, the electric energy provided by the lower magnetic flow generating tube to the lower electromagnet and impeller water pump is reduced, so that the distance between the lower electromagnet and the first magnet block becomes smaller until the forces acting on the first magnet block by the two electromagnets are balanced, the gap between the through hole on the baffle plate in the lower overflow pipe and the plug becomes smaller, and the power of the lower impeller water pump is increased, thereby reducing the discharge rate of the finely ground ore slurry.

Images