Device for judging blockage of grader and dredging blockage and using method thereof

Abstract

The invention provides a device for judging blockage of a grader and dredging blockage and a using method of the device, relates to the technical field of chemical equipment, and solves the technical problem that an existing grader easily causes misjudgment when judging blockage through flow monitoring. The device comprises a first magnetic ring, a first inner cylinder sleeve and a flow measuring device, wherein the flow measuring device comprises a magnetic induction blade which is rotationally arranged in a mother liquor pipe and is used for rotating along with the flowing of a material; the magnetic induction blade cuts a magnetic induction line of the first magnetic ring in the rotating direction, and two ends of the magnetic induction blade are connected with a coil of an electromagnetic relay; the electromagnetic relay is used for controlling on and off of the motor and the indicator lamp; and the motor is used for controlling the first magnetic ring to drive the first inner cylinder sleeve to dredge the mother liquor pipe. The blocking condition of the mother liquor can be monitored in real time; after blockage occurs, the motor can be automatically started through the electromagnetic relay to dredge the mother liquor pipe; and the blockage condition of the mother liquor pipe is judged through the flow measuring device and the magnetized filler layer, so that the judgment is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical equipment, and in particular to a device for judging and clearing blockage of a classifier and a method for using the device. Background Art

[0002] In the field of chemical equipment technology, the classifier is a common device, which is mainly used for classifying materials. In the alumina production process, the seed decomposition process is an important link, involving a large amount of solid materials. These materials will form slurry in the process solution, causing the blockage of pipes, valves, instruments and other equipment, affecting production efficiency. Therefore, how to effectively prevent and solve the problem of slurry blockage is an important research direction in the alumina production process.

[0003] The existing solutions are mainly to ensure the normal operation of the classifier through regular inspection and maintenance. For example, by observing the operating status of the classifier, regularly cleaning and replacing pipes, valves, instruments and other equipment to prevent slurry blockage. In addition, there are some solutions to improve the anti-blocking performance of the equipment by improving the equipment design.

[0004] However, the existing technologies still have some problems and shortcomings in practical applications. First, most of the existing solutions rely on manual operations, which are inefficient and prone to omissions. Second, the existing solutions are often unable to detect and deal with slurry blockage in time before it occurs, resulting in reduced production efficiency and even possible production interruptions. In addition, when dealing with slurry blockage problems, the existing solutions often require shutdown for maintenance, which not only increases production costs but also affects production progress.

[0005] Therefore, in the powder classification and sedimentation device proposed in the patent with publication number CN204396120U, flow observation barrels are provided between the mid-flow outlet and the intermediate tank, and between the bottom flow outlet and the intermediate tank, which can judge whether the mid-flow outlet and the bottom flow outlet of the classifier are blocked by observing the flow. However, in actual production, the transparent flow observation barrel is easily blocked by material adsorption, so it is difficult to see and judge, and the flow is generally monitored by a flow meter. In the classifier, especially the airflow classifier, the material is sent into the classification area together with the air, and the separation of coarse and fine materials is achieved under the centrifugal force generated by the high-speed rotating classification turbine. The airflow in the classifier interferes greatly with the flowmeter, making it impossible for the flowmeter to accurately judge the blockage of the classifier, which is prone to misjudgment. Summary of the invention

[0006] The invention provides a method for judging whether a classifier is blocked, a blockage clearing device and a use method thereof, so as to solve the technical problem that the existing classifier is prone to misjudgment when judging blockage through flow monitoring.

[0007] The embodiments of the present invention are implemented by the following technical solutions:

[0008] A device for judging whether a classifier is blocked and clearing the blockage comprises a first magnetic ring installed on the outside of a mother liquor pipe of the classifier, a first inner cylinder sleeve arranged on the inside of the mother liquor pipe and magnetically connected to the first magnetic ring, and a flow measuring device connected to the mother liquor pipe, wherein the flow measuring device comprises a magnetically sensitive blade rotatably arranged in the mother liquor pipe and used to rotate with the flow of materials; the magnetically sensitive blade rotates in a direction that cuts the magnetic flux lines of the first magnetic ring, and the two ends are connected to the coil of an electromagnetic relay; the electromagnetic relay is used to control the opening and closing of a motor and an indicator light; the motor is used to control the first magnetic ring to drive the first inner cylinder sleeve to clear the mother liquor pipe.

[0009] Preferably, the electromagnetic relay includes a spring for connecting one end of the power supply, and a first contact and a second contact for connecting the motor and the indicator light respectively.

[0010] Preferably, the second contact is connected to one end of the electromagnetic relay iron core, and the other end of the iron core is provided with a spring sheet and a first contact, and the spring sheet is also connected to the second contact through an elastic member.

[0011] Preferably, it also includes a second magnetic ring installed on the outside of the mother liquid pipe of the classifier, and a second inner cylinder sleeve arranged on the inside of the mother liquid pipe and magnetically connected to the second magnetic ring; the flow measuring device is arranged between the second magnetic ring and the first magnetic ring.

[0012] Preferably, the first inner cylinder sleeve is also provided with a magnetized filler layer for displaying material flow conditions and a coarse screen for limiting the magnetized filler layer.

[0013] Preferably, an electrical signal detection instrument for detecting the state of the magnetized filler layer is also provided on the outside of the mother liquid pipe.

[0014] Preferably, the flow measuring device is provided with two groups of magnetically sensitive blades in the same plane and a plurality of groups of hollow balancing blades in non-coplanar directions.

[0015] Preferably, the mother liquid pipe is provided with an axial sliding groove and a radial sliding groove for slidingly connecting the first magnetic ring and the second magnetic ring.

[0016] A method for determining whether a classifier is blocked and using a device for clearing the blockage comprises the following steps:

[0017] S1: Filling and installing equipment;

[0018] S2: magnetize filler and run classifier;

[0019] S3: Determine whether the mother liquid pipe is blocked during the operation of the classifier by combining the packing state and the flow measuring device;

[0020] S4: When the mother liquid pipe is blocked, the electromagnetic relay is used to start the motor to control the axial and radial movement of the first magnetic ring and the second magnetic ring, thereby driving the first inner cylinder sleeve and the second inner cylinder sleeve to clear the mother liquid pipe.

[0021] Preferably, in step S1, the surface of the filler is plated with a magnetic material, and the magnetic material is one of iron, cobalt and nickel; the filler is a small ball with a pore size of >20mm, the pore size of the coarse screen is 15mm-20m, and the filling amount of the filler accounts for 40%-70% of the volume of the magnetic filler layer.

[0022] By adopting the technical solution, the first magnetic ring and the second magnetic ring form magnetic flux lines that axially pass through the mother liquid pipe and magnetize the filler in the magnetized filler layer. Whether the mother liquid pipe is blocked is judged by the movement state of the flow measuring device and the magnetized filler. When the mother liquid flows through, it will drive the magnetically sensitive blades of the flow measuring device to rotate, and have a flushing effect on the filler in the magnetized filler layer. The magnetized filler is flushed in the fluid and rubs against the liquid to move in the magnetic field. The magnetized filler will generate a certain charge, which is detected by the electrical signal detection device. The electromagnetic relay is controlled by the flow measuring device to jointly judge whether the mother liquid pipe is blocked. If it is not blocked, the unblocked model prompt light will be displayed.

[0023] The first magnetic ring can control the first inner cylinder sleeve while forming magnetic flux lines to clear the inside of the pipeline;

[0024] After being blocked, the motor is turned on through the automatic electromagnetic relay control to control the first inner cylinder sleeve and the second inner cylinder sleeve to move axially and radially to dredge the mother liquid pipe;

[0025] In the magnetized filler layer, the magnetized filler only fills 40%-70% of the space in the filler layer, leaving space for the fluid to flush the magnetized filler, so as to facilitate the judgment of the blockage of the mother liquid pipe. The magnetized filler layer and the coarse screen also have the function of preliminary screening and grinding for the liquid flowing through, and the blockage is most likely to occur in front of the coarse drying screen, and then the blockage is cleared through the device.

[0026] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0027] 1. The present invention can monitor the blockage of the mother liquor in real time, avoiding the problem of relying on manual operation, low efficiency and easy omission in the prior art;

[0028] 2. When the present invention is blocked, the electromagnetic relay can automatically start the motor to dredge the mother liquid pipe;

[0029] 3. The present invention uses a flow measuring device and a magnetized filler layer to simultaneously judge the blockage of the mother liquid pipe, so the judgment is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 A schematic diagram of the side structure of a device for determining and clearing blockage of a classifier provided in Example 1 of the present invention;

[0032] Figure 2 A schematic diagram of the structure of an electromagnetic relay for a device for determining and clearing blockage of a classifier provided in Example 1 of the present invention;

[0033] Figure 3 A schematic diagram of the front view of the structure of the device for judging the blockage of a classifier and clearing the blockage provided in Embodiment 3 of the present invention;

[0034] Figure 4 This is a schematic diagram of the top view of the structure of the device for judging the blockage of a classifier and clearing the blockage provided in Example 3 of the present invention.

[0035] Icons: 1. Mother liquid pipe; 11. Axial slide; 12. Radial slide; 2. First magnetic ring; 21. First inner cylinder sleeve; 22. Coarse screen; 23. Magnetized filler layer; 3. Second magnetic ring; 31. Second inner cylinder sleeve; 4. Flow measuring device; 41. Magnetic sensitive blade; 42. Balancing blade; 5. Electromagnetic relay; 51. First contact; 52. Shrapnel; 53. Second contact; 54. Coil; 55. Iron core; 6. Motor; 7. Indicator light; 9. Electrical signal detection instrument. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Example 1

[0042] A device for judging whether a classifier is blocked and clearing the blockage comprises a first magnetic ring 2 installed on the outside of a mother liquor pipe 1 of the classifier, a first inner cylinder sleeve 21 arranged on the inside of the mother liquor pipe 1 and magnetically connected to the first magnetic ring 2, and a flow measuring device 4 connected to the mother liquor pipe 1, wherein the flow measuring device 4 comprises a magnetically sensitive blade 41 rotatably arranged in the mother liquor pipe 1 and used to rotate with the flow of materials; the magnetically sensitive blade 41 rotates in a direction that cuts the magnetic flux lines of the first magnetic ring 2, and the two ends are connected to the coil 54 of the electromagnetic relay 5; the electromagnetic relay 5 is used to control the opening and closing of the motor 6 and the indicator light 7; the motor 6 is used to control the first magnetic ring 2 to drive the first inner cylinder sleeve 21 to clear the mother liquor pipe 1.

[0043] In this embodiment, the electromagnetic relay 5 includes a spring 52 for connecting one end of a power source, and a first contact 51 and a second contact 53 for connecting the motor 6 and the indicator light 7 respectively.

[0044] In this embodiment, the second contact 53 is connected to one end of the iron core 55 of the electromagnetic relay 5. The other end of the iron core 55 is provided with a spring 52 and a first contact 51. The spring 52 is also connected to the second contact 53 through an elastic member.

[0045] In this embodiment, it also includes a second magnetic ring 3 installed on the outside of the classifier mother liquid pipe 1, and a second inner cylinder sleeve 31 magnetically connected to the second magnetic ring 3 and arranged on the inside of the mother liquid pipe 1; the flow measuring device 4 is arranged between the second magnetic ring 3 and the first magnetic ring 2.

[0046] In this embodiment, the first inner cylinder sleeve 21 is further provided with a magnetized filler layer 23 for displaying material flow conditions and a coarse screen 22 for limiting the magnetized filler layer 23 .

[0047] In this embodiment, the flow measuring device 4 is provided with two groups of magnetically sensitive blades 41 in the same plane and a plurality of groups of hollow balancing blades 42 in non-coplanar directions.

[0048] Example 2

[0049] A method for determining whether a classifier is blocked and using a device for clearing the blockage comprises the following steps:

[0050] S1: Filling and installing equipment;

[0051] S2: magnetize filler and run classifier;

[0052] S3: judging whether the mother liquid pipe 1 is blocked during the operation of the classifier by the packing state and the flow measuring device 4;

[0053] S4: After the mother liquid pipe 1 is blocked, the electromagnetic relay 5 is used to start the motor 6 to control the axial and radial movements of the first magnetic ring 2 and the second magnetic ring 3, thereby driving the first inner cylinder sleeve 21 and the second inner cylinder sleeve 31 to clear the mother liquid pipe 1.

[0054] In this embodiment, in step S1, the surface of the filler is plated with a magnetic material, and the magnetic material is one of iron, cobalt and nickel; the filler is a small ball with a pore size of >20mm, the pore size of the coarse screen 22 is 15mm-20m, and the filling amount of the filler accounts for 40%-70% of the volume of the magnetic filler layer 23.

[0055] By adopting the technical solution, the first magnetic ring 2 and the second magnetic ring 3 form magnetic flux lines that axially pass through the mother liquid pipe 1 and magnetize the filler in the magnetized filler layer 23. The flow measuring device 4 and the movement state of the magnetized filler are used to determine whether the mother liquid pipe 1 is blocked. When the mother liquid flows through, it will drive the magnetically sensitive blade 41 of the flow measuring device 4 to rotate, and have a flushing effect on the filler in the magnetized filler layer 23. The magnetized filler is flushed in the fluid and rubs against the liquid to move in the magnetic field. The magnetized filler will generate a certain charge, which is detected by the electrical signal detection device. The electromagnetic relay 5 is controlled by the flow measuring device 4 to jointly determine whether the mother liquid pipe 1 is blocked. If it is not blocked, the unblocked model prompt light will be displayed;

[0056] The first magnetic ring 2 can control the first inner cylinder sleeve 21 while forming magnetic flux lines to clear the inside of the pipeline;

[0057] After being blocked, the electromagnetic relay 5 is automatically controlled to start the motor 6 to control the first inner cylinder sleeve 21 and the second inner cylinder sleeve 31 to move axially and radially to clear the mother liquid pipe 1;

[0058] In the magnetized filler layer 23, the magnetized filler only fills 40%-70% of the filler layer space, and reserves space for the fluid to flush the magnetized filler, so as to facilitate the judgment of the blockage of the mother liquid pipe 1. The magnetized filler layer 23 and the coarse screen 22 also have the function of preliminary screening and grinding for the flowing liquid, and the blockage is most likely to occur in front of the coarse drying screen, and then the blockage is cleared through the device.

[0059] Example 3

[0060] The only difference between this embodiment and embodiment 1 is that, in this embodiment, the mother liquid pipe 1 is provided with an axial sliding groove 11 and a radial sliding groove 12 for slidingly connecting the first magnetic ring 2 and the second magnetic ring 3 .

[0061] In this embodiment, an electrical signal detection instrument 9 for detecting the state of the magnetized filler layer 23 is further provided on the outside of the mother liquid pipe 1 .

[0062] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for determining whether a classifier is blocked and clearing the blockage, characterized in that: The invention comprises a first magnetic ring (2) installed on the outside of a mother liquid pipe (1) of a classifier, a first inner cylinder sleeve (21) arranged on the inside of the mother liquid pipe (1) and magnetically connected to the first magnetic ring (2), and a flow measuring device (4) connected to the mother liquid pipe (1), wherein the flow measuring device (4) comprises a magnetically sensitive blade (41) rotatably arranged in the mother liquid pipe (1) and used to rotate with the flow of materials; the magnetically sensitive blade (41) rotates in a direction that cuts the magnetic flux of the first magnetic ring (2), and the two ends are connected to the coil (54) of an electromagnetic relay (5); the electromagnetic relay (5) is used to control the opening and closing of a motor (6) and an indicator light (7); and the motor (6) is used to control the first magnetic ring (2) to drive the first inner cylinder sleeve (21) to clear the mother liquid pipe (1).

2. A device for determining and clearing blockage of a classifier according to claim 1, characterized in that: The electromagnetic relay (5) comprises a spring (52) for connecting one end of a power supply, and a first contact (51) and a second contact (53) for connecting the motor (6) and the indicator light (7) respectively.

3. A device for determining and clearing blockage of a classifier according to claim 2, characterized in that: The second contact (53) is connected to one end of the iron core (55) of the electromagnetic relay (5); the other end of the iron core (55) is provided with a spring sheet (52) and a first contact (51); the spring sheet (52) is also connected to the second contact (53) via an elastic member.

4. A device for determining and clearing blockage of a classifier according to any one of claims 1 to 3, characterized in that: It also comprises a second magnetic ring (3) installed on the outside of the classifier mother liquid pipe (1), and a second inner cylinder sleeve (31) arranged on the inside of the mother liquid pipe (1) and magnetically connected to the second magnetic ring (3); the flow measuring device (4) is arranged between the second magnetic ring (3) and the first magnetic ring (2).

5. A device for determining and clearing blockage of a classifier according to any one of claims 1 to 3, characterized in that: The first inner cylinder sleeve (21) is also provided with a magnetized filler layer (23) for displaying material flow conditions and a coarse screen (22) for limiting the position of the magnetized filler layer (23).

6. A device for determining and clearing blockage of a classifier according to claim 5, characterized in that: An electrical signal detection instrument (9) for detecting the state of the magnetized filler layer (23) is also provided on the outside of the mother liquid pipe (1).

7. A device for determining and clearing blockage of a classifier according to any one of claims 1 to 3, characterized in that: The flow measuring device (4) is provided with two groups of magnetically sensitive blades (41) in the same plane and a plurality of groups of hollow balancing blades (42) in non-coplanar directions.

8. A device for determining and clearing blockage of a classifier according to any one of claims 1 to 3, characterized in that: The mother liquid pipe (1) is provided with an axial sliding groove (11) and a radial sliding groove (12) for slidingly connecting the first magnetic ring (2) and the second magnetic ring (3).

9. A method for using the device for determining blockage of a classifier and clearing blockage according to any one of claims 1 to 8, characterized in that: The steps include: S1: Filling and installing equipment; S2: magnetize filler and run classifier; S3: judging whether the mother liquid pipe (1) is blocked during the operation of the classifier by the state of the packing and the flow measuring device; S4: When the mother liquid pipe is blocked, the motor (6) is turned on through the electromagnetic relay (5) to control the axial and radial movement of the first magnetic ring (2) and the second magnetic ring (3), thereby driving the first inner cylinder sleeve (21) and the second inner cylinder sleeve (31) to clear the mother liquid pipe (1).

10. A method for determining blockage of a classifier and using a device for clearing blockage according to claim 9, characterized in that: In step S1, the surface of the filler is plated with a magnetic material, and the magnetic material is one of iron, cobalt and nickel; the filler is a small ball with a pore size greater than 20 mm, the pore size of the coarse screen (22) is 15 mm-20 m, and the filling amount of the filler accounts for 40%-70% of the volume of the magnetic filler layer (23).

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