A leak-proof magnetic separator

Abstract

The present invention belongs to the technical field of magnetic separation equipment, and specifically discloses a magnetic separator for preventing material leakage, which comprises a frame. An electromagnetic generating device is provided on the frame. The electromagnetic generating device has a vertically arranged material pipeline. An electromagnetic coil is provided in the electromagnetic generating device. A magnetically conductive module capable of moving up and down is installed in the material pipeline. The magnetically conductive module comprises a central tube. A plurality of mesh supports are connected to the central tube. Magnetically conductive mesh sheets are installed on the mesh supports. An annular installation groove is provided at the outer edge of the mesh support. A hollow elastic rubber ring is installed in the annular installation groove. A connecting pipe is provided on the hollow elastic rubber ring. The connecting pipe communicates with the central tube through an air flow channel provided on the mesh support. Through the improvement of the magnetically conductive module and its installation structure, the present invention can seal the gap between the mesh support and the material pipeline during the magnetic separation stage, solve the problem that materials directly leak downward through the gap between the magnetically conductive mesh sheet and the material pipeline, and improve the iron removal effect of the magnetic separator.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetic separation equipment, and particularly relates to a magnetic separator for preventing material leakage. Background Art

[0002] A magnetic separator is an industrial equipment used to separate ferromagnetic components from non-ferromagnetic components in materials. A relatively common magnetic separator currently has the following structure: The magnetic separator includes a frame, on which an electromagnetic generating device is provided. The electromagnetic generating device has a vertically arranged material pipeline, and electromagnetic coils are arranged around the material pipeline inside the electromagnetic generating device. A magnetically conductive module that can move up and down is installed in the material pipeline. The upper end of the magnetically conductive module is fixedly connected to a support frame, an elastic connecting device is provided between the support frame and the frame, and a vibration motor is installed on the support frame. The magnetically conductive module includes a vertically arranged central shaft, and a plurality of magnetically conductive mesh sheets are installed on the central shaft at intervals up and down.

[0003] The working process of this magnetic separator mainly includes a magnetic separation stage and an iron discharging stage. Magnetic separation stage: When the electromagnetic coils are energized to generate a magnetic field, the magnetically conductive mesh sheets on the magnetically conductive module are magnetized; when the material passes through the material pipeline, ferromagnetic substances are adsorbed on the magnetically conductive mesh sheets, and the remaining materials flow downward through the mesh holes of the magnetically conductive mesh sheets. Iron discharging stage: After the work in the magnetic separation stage, a large amount of ferromagnetic substances will be adsorbed on the magnetically conductive mesh sheets. At this time, it is necessary to stop feeding materials into the material pipeline. Next, the electromagnetic coils are powered off, the magnetically conductive mesh sheets demagnetize, the vibration motor is started, the magnetically conductive module shakes up and down, and the ferromagnetic substances adsorbed on the magnetically conductive mesh sheets fall off.

[0004] This magnetic separator can be used for iron removal and purification of materials, and has a relatively high iron removal efficiency. However, there are still the following problems in the use process: In the magnetic separation stage, most of the materials flow downward through the mesh holes of the magnetically conductive mesh sheets. During the process of passing through the layers of magnetically conductive mesh sheets, the ferromagnetic substances in the materials are fully adsorbed by the magnetically conductive mesh sheets. However, due to the existence of an activity gap between the magnetically conductive mesh sheets and the inner wall of the material pipeline, a small part of the materials will directly leak downward through the gap between the magnetically conductive mesh sheets and the material pipeline. The ferromagnetic substances in this part of the materials are not removed sufficiently, resulting in an impact on the overall iron removal effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a magnetic separator for preventing material leakage, which solves the problem in the prior art that some materials will directly leak downward through the gap between the magnetically conductive mesh sheets and the material pipeline, resulting in insufficient iron removal.

[0006] To achieve the above object, the present invention discloses a leakage-proof magnetic separator, which includes a frame. An electromagnetic generating device is provided on the frame. The electromagnetic generating device has a material pipeline arranged vertically. An electromagnetic coil is arranged around the material pipeline in the electromagnetic generating device. A magnetically conductive module capable of moving up and down is installed in the material pipeline. The magnetically conductive module includes a central tube arranged vertically with a closed lower end. A plurality of mesh supports are connected to the central tube at intervals up and down. Magnetically conductive mesh sheets are installed on the mesh supports. An annular installation groove is provided at the outer edge of the mesh support. A hollow elastic rubber ring is installed in the annular installation groove. A connecting pipe is provided on the hollow elastic rubber ring. A first ventilation hole is provided on the central tube. An air flow channel is provided on the mesh support. The connecting pipe, the air flow channel, and the first ventilation hole are connected in sequence. Through the above improvement, gas can be filled into the central tube before the magnetic separation stage. The gas enters the inner cavity of the hollow elastic rubber ring. After the hollow elastic rubber ring bulges, it contacts the inner wall of the material pipeline, thereby blocking the gap between the mesh support and the material pipeline to prevent the material from directly leaking downward without passing through the magnetically conductive mesh sheet. In this way, the material can only flow downward after being fully de-ironed by the magnetically conductive mesh sheet, thereby improving the overall de-ironing effect. During the iron discharge stage, the gas in the central tube can be discharged, so that the hollow elastic rubber ring deflates and retracts into the annular installation groove, and the magnetically conductive module returns to the state where it can move up and down, facilitating the shaking off of the ferromagnetic substances adsorbed on the magnetically conductive mesh sheet.

[0007] Further, a spacer sleeve is provided at the part of the central tube between adjacent mesh supports. An air outlet hole is provided on the spacer sleeve. A second ventilation hole is provided on the central tube. The second ventilation hole is connected to the air outlet hole. The first ventilation hole and the second ventilation hole on the central tube are arranged alternately up and down. A core column capable of sliding up and down is installed in the central tube. A plurality of sealing convex rings are axially spaced on the core column. A communication hole penetrating the upper and lower end faces is provided on the sealing convex ring. The core column has two working positions up and down. When the core column is in the first working position, the outer peripheral surface of the sealing convex ring blocks the second ventilation hole and opens the first ventilation hole. When the core column is in the second working position, the outer peripheral surface of the sealing convex ring blocks the first ventilation hole and opens the second ventilation hole. After adopting the above structure, the core column can be first slid to the first working position, and gas is filled into the central tube. The hollow elastic rubber ring enters the inflated state. The inflated hollow elastic rubber ring blocks the gap between the mesh support and the material pipeline. Next, the core column is slid to the second working position, and the outer peripheral surface of the sealing convex ring blocks the first ventilation hole to keep the inflated state of the hollow elastic rubber ring unchanged. At this time, gas is filled into the central tube again, and the air flow can flow to the gap between the mesh supports through the second ventilation hole, which is beneficial to promoting the passage of the material. During the iron discharge stage, the core column can be first slid to the first working position, and the hollow elastic rubber ring exhausts and retracts. Next, the core column is slid to the second working position. At this time, gas is filled into the central tube again, and the air flow enters the gap between the mesh supports, which is beneficial to promoting the detachment of the ferromagnetic substances from the magnetically conductive mesh sheet.

[0008] Furthermore, the mesh support includes an inner ring and an outer ring. A plurality of support tubes are annularly arranged between the inner ring and the outer ring. Both ends of the support tubes are fixedly connected to the inner ring and the outer ring respectively. The support tubes divide the space between the inner ring and the outer ring into a plurality of fan-shaped installation areas, and a magnetic conductive mesh is installed in each fan-shaped installation area. After adopting the above structure, magnetic conductive meshes with different mesh apertures can be replaced according to different materials.

[0009] Furthermore, the magnetic conductive mesh includes a fan-shaped frame body. A number of rib pieces arranged crosswise are connected inside the fan-shaped frame body. The gaps between the rib pieces form mesh apertures. An ear plate is connected to each of the outer sides of the two straight edges of the fan-shaped frame body near the upper surface. After adopting the above structure, when the magnetic conductive mesh is placed in the fan-shaped installation area, the two ear plates are respectively stuck on the two support tubes, which is convenient for fixing the magnetic conductive mesh.

[0010] Furthermore, an inner ring through hole is provided on the inner ring, and an outer ring through hole is provided on the outer ring. The inner cavity of the support tube is communicated with the inner ring through hole and the outer ring through hole to form the air flow channel. After adopting the above structure, only by drilling the inner ring through hole and the outer ring through hole on the inner ring and the outer ring respectively and making them communicate with the inner cavity of the support tube, the air flow channel can be formed, and the processing is relatively convenient.

[0011] Furthermore, a feed pipe is provided at the upper opening of the material pipeline. The lower end of the feed pipe extends into the feed pipe. An inner support frame is provided inside the feed pipe. The magnetic conductive module is fixedly installed on the inner support frame. An outer support frame is provided outside the feed pipe. The outer support frame is located above the electromagnetic generating device. The outer support frame and the electromagnetic generating device are connected by a plurality of elastic connection mechanisms distributed around the feed pipe. A vibration motor is installed on the outer support frame. After adopting the above structure, through the connection of the elastic connection mechanisms, the magnetic conductive module has an elastic movement space. Starting the vibration motor can make the magnetic conductive module vibrate up and down to promote the detachment of ferromagnetic substances from the magnetic conductive mesh.

[0012] Furthermore, the elastic connection mechanism includes a spring and a cushion block arranged between the outer support frame and the electromagnetic generating device, and also includes a connecting bolt. The cushion block is fixedly connected to the electromagnetic generating device. The spring is located between the outer support frame and the cushion block. Through holes and threaded holes are respectively provided on the outer support frame and the cushion block. The connecting bolt passes through the through hole and is screwed into the threaded hole. After adopting the above structure, the cooperation between the connecting bolt and the through hole enables the outer support frame to move up and down, and the spring can provide elastic support for the outer support frame. Thus, the magnetic conductive module can elastically move up and down along with the feed pipe.

[0013] Further, the central tube includes a first connecting tube, a second connecting tube, a third connecting tube, and a lower connecting head that are connected in sequence from top to bottom. The mesh support is installed on the third connecting tube. A first limiting retaining ring is provided at a position on the core column above the first sealing convex ring. An inner retaining ring is provided in the second connecting tube. The core column passes through the central hole of the inner retaining ring. The inner retaining ring is used to limit the first limiting retaining ring when the core column slides upward. The inner retaining ring is provided with ventilation holes penetrating its upper and lower end faces. A second limiting retaining ring is provided at the lower end of the core column. A limiting groove is provided in the lower connecting head. The bottom of the limiting groove is used to limit the second limiting retaining ring when the core column slides downward. A sealing portion for sealing with the core column is provided at the upper end of the first connecting tube. An air pipe joint is provided at a position on the first connecting tube below the sealing portion. A core column driving device for driving the core column to slide up and down is installed at the upper end of the first connecting tube. After adopting the above structure, the core column driving device can drive the core column to slide up and down, change the working position of the core column. The inner retaining ring and the bottom of the limiting groove are respectively used to limit the upward movement and downward movement of the core column, and the core column is limited to the second working position and the first working position.

[0014] Further, the core column includes a first connecting column and a second connecting column that are connected in sequence from top to bottom. The sealing convex ring is provided on the second connecting column. The upper end of the first connecting column is connected to the power output end of the core column driving device. After adopting the above structure, the core column is extended by connecting the first connecting column and the second connecting column, realizing the connection with the power output end of the core column driving device, and at the same time facilitating the installation of the core column.

[0015] Further, an elastic rubber sleeve is fixedly connected to the outer peripheral surface of the sealing convex ring. Sealing ring grooves are provided at positions on the central tube above and below the first ventilation hole. Sealing rings or sealing fillers are installed in the sealing ring grooves. After adopting the above structure, gas leakage in the hollow elastic rubber sleeve can be prevented to keep the state of the hollow elastic rubber sleeve unchanged when it bulges.

[0016] In summary, the beneficial effects of the present invention are as follows: By improving the magnetic conduction module and its installation structure, without affecting the up and down movement of the magnetic conduction module during the iron discharging stage, the gap between the mesh support and the material pipeline can be blocked during the magnetic separation stage, so that the material can only flow downward through the mesh holes of the magnetic conduction mesh. It not only solves the problem that the material directly leaks downward through the gap between the magnetic conduction mesh and the material pipeline, but also enables the ferromagnetic substances in the material to be fully adsorbed by the magnetic conduction mesh, improving the iron removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0018] Figure 2 is a perspective view of the lower half of the magnetic conduction module in the present invention;

[0019] Figure 3 is Figure 2 a cross-sectional view of a part of the magnetic conduction module shown in a working state;

[0020] Figure 4 is Figure 2 a cross-sectional view of a part of the magnetic conduction module shown in another working state;

[0021] Figure 5 is Figure 3 a detailed view of the connection structure between the mesh support and the central tube shown in;

[0022] Figure 6 a perspective view of a partial structure of a core column in an embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of the installation structure of a mesh support and a magnetic conduction mesh in an embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of the structure of a magnetic conduction mesh in an embodiment of the present invention;

[0025] Figure 9 is Figure 1 an enlarged view of part A in;

[0026] Figure 10 is a schematic diagram of the structure of a magnetic conduction module in an embodiment of the present invention.

[0027] In the figure: 1, frame; 2, electromagnetic generating device; 3, material pipeline; 4, electromagnetic coil; 5, magnetic conduction module; 6, central tube; 7, mesh support; 8, magnetic conduction mesh; 9, annular installation groove; 10, hollow elastic rubber ring; 11, connecting pipe; 12, first ventilation hole; 13, air flow channel; 14, spacer sleeve; 15, air outlet hole; 16, second ventilation hole; 17, core column; 18, sealing convex ring; 19, communication hole; 20, inner ring; 21, outer ring; 22, support tube; 23, fan-shaped installation area; 24, fan-shaped frame; 25, rib; 26, ear plate; 27, inner ring through hole; 28, outer ring through hole; 29, feed pipe; 30, inner support frame; 31, outer support frame; 32, elastic connection mechanism; 33, vibration motor; 34, spring; 35, cushion block; 36, connecting bolt; 37, through hole; 38, threaded hole; 39, first connecting pipe; 40, second connecting pipe; 41, third connecting pipe; 42, lower connecting head; 43, air pipe joint; 44, core column driving device; 45, first connecting column; 46, second connecting column; 47, elastic rubber sleeve; 48, sealing ring groove; 49, first limiting retaining ring; 50, inner retaining ring; 51, ventilation hole; 52, second limiting retaining ring; 53, limiting groove; 54, sealing part. Detailed implementation manners

[0028] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0029] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , in some embodiments of the present invention, the anti-leakage magnetic separator includes a frame 1, an electromagnetic generating device 2 is provided on the frame 1, the electromagnetic generating device 2 has a material pipeline 3 arranged vertically, an electromagnetic coil 4 is arranged around the material pipeline 3 in the electromagnetic generating device 2, and a magnetically conductive module 5 capable of moving up and down is installed in the material pipeline 3. The magnetically conductive module 5 includes a central tube 6 arranged vertically and closed at the lower end, a plurality of mesh supports 7 are connected to the central tube 6 at intervals up and down, a magnetically conductive mesh 8 is installed on the mesh support 7, an annular installation groove 9 is provided at the outer edge of the mesh support 7, and a hollow elastic rubber ring 10 is installed in the annular installation groove 9. A connecting pipe 11 is provided on the hollow elastic rubber ring 10, the inner cavity of the connecting pipe 11 is communicated with the inner cavity of the hollow elastic rubber ring 10, a first ventilation hole 12 is provided on the central tube 6, an air flow channel 13 is provided on the mesh support 7, the first end of the connecting pipe 11 extends into the air flow channel 13 and the outer wall of the connecting pipe 11 is fixedly and sealedly connected to the inner wall of the air flow channel 13, and the second end of the air flow channel 13 is communicated with the first ventilation hole 12. The connecting pipe 11, the air flow channel 13, and the first ventilation hole 12 are sequentially communicated, so that the inner cavity of the hollow elastic rubber ring 10 is communicated with the inner cavity of the central tube 6.

[0030] When the anti-leakage magnetic separator is in use: Before entering the magnetic separation stage, gas can be filled into the central tube 6, the gas enters the inner cavity of the hollow elastic rubber ring 10, and after the hollow elastic rubber ring 10 bulges, it contacts the inner wall of the material pipeline 3. The bulged hollow elastic rubber ring 10 seals the gap between the mesh support 7 and the material pipeline 3, which can prevent the material from directly leaking downward without passing through the magnetically conductive mesh 8. In this way, the material can only flow downward after being fully de-ironed by the magnetically conductive mesh 8, thereby improving the overall de-ironing effect. In the iron discharging stage, the gas in the central tube 6 can be discharged, so that the hollow elastic rubber ring 10 deflates and retracts into the annular installation groove 9, and the magnetically conductive module 5 resumes the state of being able to move up and down, which is convenient for shaking off the ferromagnetic substances adsorbed on the magnetically conductive mesh 8. The inflated state of the hollow elastic rubber ring 10 can be referred to Figure 4 , and the state of the hollow elastic rubber ring 10 after deflation can be referred to Figure 3 .

[0031] Referring to Figure 4 , Figure 5 , Figure 6, in some embodiments of the present invention, a spacer sleeve 14 is provided at a portion of the central tube 6 between adjacent mesh supports 7. An air outlet hole 15 is provided on the spacer sleeve 14, and a second ventilation hole 16 is provided on the central tube 6. The second ventilation hole 16 is communicated with the air outlet hole 15. The first ventilation hole 12 on the central tube 6 and the second ventilation hole 16 are arranged alternately up and down. A core column 17 that can slide up and down is installed in the central tube 6. A plurality of sealing convex rings 18 are axially spaced on the core column 17. A communication hole 19 penetrating the upper and lower end faces is provided on the sealing convex ring 18. The core column 17 has two working positions up and down. When the core column 17 is in the first working position, the outer peripheral surface of the sealing convex ring 18 blocks the second ventilation hole 16 and opens the first ventilation hole 12. When the core column 17 is in the second working position, the outer peripheral surface of the sealing convex ring 18 blocks the first ventilation hole 12 and opens the second ventilation hole 16. The state of the core column 17 in the first working position can be referred to Figure 4 , the state of the core column 17 in the second working position can be referred to Figure 3 . After further improvement, when the leak-proof magnetic separator is in use, the core column 17 can be first slid to the first working position, and air is introduced into the central tube 6. The hollow elastic rubber ring 10 enters the inflated state. The inflated hollow elastic rubber ring 10 blocks the gap between the mesh support 7 and the material pipeline 3. Next, the core column 17 is slid to the second working position, and the outer peripheral surface of the sealing convex ring 18 blocks the first ventilation hole 12 to keep the inflated state of the hollow elastic rubber ring 10 unchanged. At this time, air is introduced into the central tube 6 again, and the air flow can flow through the second ventilation hole 16 to the gap between the mesh supports 7, which is beneficial to promoting the passage of materials. During the iron removal stage, the core column 17 can be first slid to the first working position, and the hollow elastic rubber ring 10 exhausts and retracts. Next, the core column 17 is slid to the second working position. At this time, air is introduced into the central tube 6 again, and the air flow enters the gap of the mesh support 7, which is beneficial to promoting the detachment of ferromagnetic substances from the magnetic conductive mesh 8.

[0032] Refer to Figure 7 、 Figure 8, in some embodiments of the present invention, the mesh support 7 includes an inner ring 20 and an outer ring 21. A plurality of support tubes 22 are annularly arranged between the inner ring 20 and the outer ring 21. The two ends of the support tubes 22 are respectively fixedly connected to the inner ring 20 and the outer ring 21. The support tubes 22 divide the space between the inner ring 20 and the outer ring 21 into a plurality of fan-shaped installation areas 23. A magnetic conductive mesh 8 is installed in each fan-shaped installation area 23. After the above improvement, the magnetic conductive mesh 8 on the mesh support 7 can be replaced, so that different magnetic conductive meshes 8 with different mesh sizes can be replaced according to different materials. By installing magnetic conductive meshes 8 with different mesh sizes on the upper and lower layer mesh supports 7, the iron removal efficiency and the iron removal effect can be taken into account. For example, the mesh size of the magnetic conductive mesh 8 installed on the mesh support 7 gradually decreases from the uppermost layer to the lowermost layer; or the mesh size of the magnetic conductive mesh 8 installed on several upper layer mesh supports 7 is larger than that of the magnetic conductive mesh 8 installed on several lower layer mesh supports 7. Through such a setting, the large mesh size of the upper magnetic conductive mesh 8 is beneficial to the passage of materials and is used for preliminary magnetic separation; the small mesh size of the lower magnetic conductive mesh 8 is beneficial to the adsorption of ferromagnetic substances and is used for further magnetic separation, which not only has high iron removal efficiency but also good iron removal effect.

[0033] Refer to Figure 7 , Figure 8 , in some embodiments of the present invention, the magnetic conductive mesh 8 includes a fan-shaped frame 24. A plurality of rib pieces 25 arranged crosswise are connected inside the fan-shaped frame 24. The gaps between the rib pieces 25 form mesh holes. An ear plate 26 is respectively connected to the outer sides of the two straight edges of the fan-shaped frame 24 near the upper surface. When the magnetic conductive mesh 8 is placed in the fan-shaped installation area 23, the two ear plates 26 are respectively stuck on the two support tubes 22, which is convenient for fixing the magnetic conductive mesh 8. In other embodiments of the present invention, mounting holes can be provided on the ear plates 26, and fixing nuts are welded on the upper surfaces of the support tubes 22. After a fastening bolt passes through the mounting holes and is screwed into the fixing nuts, the magnetic conductive mesh 8 is relatively fixed to the mesh support 7.

[0034] Refer to Figure 5 , in some embodiments of the present invention, an inner ring through hole 27 is provided on the inner ring 20, and an outer ring through hole 28 is provided on the outer ring 21. The inner cavity of the support tube 22 is communicated with the inner ring through hole 27 and the outer ring through hole 28 to form an air flow channel 13. After the above improvement, only by respectively punching the inner ring through hole 27 and the outer ring through hole 28 on the inner ring 20 and the outer ring 21 and making them communicate with the inner cavity of the support tube 22 can the air flow channel 13 be formed, and the processing is relatively convenient.

[0035] Refer to Figure 9, in some embodiments of the present invention, a feed pipe 29 is provided at the upper opening of the material pipe 3. The lower end of the feed pipe 29 extends into the feed pipe 29. An inner support frame 30 is provided in the feed pipe 29. The magnetic conduction module 5 is fixedly installed on the inner support frame 30. An outer support frame 31 is provided outside the feed pipe 29. The outer support frame 31 is located above the electromagnetic generating device 2. The outer support frame 31 and the electromagnetic generating device 2 are connected by a plurality of elastic connection mechanisms 32 distributed around the feed pipe 29. A vibration motor 33 is installed on the outer support frame 31. Through the connection of the elastic connection mechanism, the magnetic conduction module 5 has an elastic activity space. Starting the vibration motor 33 can make the magnetic conduction module 5 vibrate up and down to promote the detachment of ferromagnetic substances from the magnetic conduction mesh sheet 8. The inner support frame 30 has a hollow structure up and down, which is used to fix the magnetic conduction module 5 on the feed pipe 29 without affecting the passage of materials through the feed pipe 29.

[0036] Refer to Figure 9 , in some embodiments of the present invention, the elastic connection mechanism 32 includes a spring 34 and a cushion block 35 provided between the outer support frame 31 and the electromagnetic generating device 2, and also includes a connecting bolt 36. The cushion block 35 is fixedly connected to the electromagnetic generating device 2. The spring 34 is located between the outer support frame 31 and the cushion block 35. Through holes 37 and threaded holes 38 are respectively provided on the outer support frame 31 and the cushion block 35. The connecting bolt 36 passes through the through hole 37 and is screwed into the threaded hole 38. The cooperation between the connecting bolt 36 and the through hole 37 enables the outer support frame 31 to move up and down. The spring 34 can provide elastic support for the outer support frame 31. Thus, the magnetic conduction module 5 can elastically move up and down with the feed pipe 29.

[0037] Refer to Figure 10, in some embodiments of the present invention, the central tube 6 includes a first connecting tube 39, a second connecting tube 40, a third connecting tube 41, and a lower connecting head 42 that are connected in sequence from top to bottom. The mesh support 7 is installed on the third connecting tube 41. A first limiting retaining ring 49 is provided on the core column 17 at a position above the first sealing convex ring 18. An inner retaining ring 50 is provided in the second connecting tube 40. The core column 17 passes through the central hole of the inner retaining ring 50. The inner retaining ring 50 is used to limit the first limiting retaining ring 49 when the core column 17 slides upward. The inner retaining ring 50 is provided with ventilation holes 51 penetrating its upper and lower end faces. A second limiting retaining ring 52 is provided at the lower end of the core column 17. A limiting groove 53 is provided in the lower connecting head 42. The bottom of the limiting groove 53 is used to limit the second limiting retaining ring 52 when the core column 17 slides downward. A core column driving device 44 for driving the core column 17 to slide up and down is installed at the upper end of the first connecting tube 39. The core column driving device 44 can drive the core column 17 to slide up and down, changing the working position of the core column 17. The bottom of the inner retaining ring 50 and the limiting groove 53 are respectively used for limiting the upward and downward movement of the core column 17, limiting the core column 17 at the second working position and the first working position. A sealing portion 54 for sealing with the core column 17 is provided at the upper end portion of the first connecting tube 39. The sealing portion 54 is provided with an annular inner cavity, and sealing packing is installed in the annular inner cavity, thereby realizing the seal between the first connecting tube 39 and the core column 17. A tracheal joint 43 is provided at a position below the sealing portion 54 on the first connecting tube 39. The tracheal joint 43 is used to connect the air inlet and outlet device, and inflate the central tube 6 or discharge the gas in the central tube 6 through the tracheal joint 43.

[0038] Referring to Figure 10 , in some embodiments of the present invention, the core column 17 includes a first connecting column 45 and a second connecting column 46 that are connected in sequence from top to bottom. The sealing convex ring 18 is provided on the second connecting column 46. The upper end of the first connecting column 45 is connected to the power output end of the core column driving device 44. With the above structure, the core column 17 is extended by connecting the first connecting column 45 and the second connecting column 46, realizing the connection with the power output end of the core column driving device 44, and at the same time facilitating the installation of the core column 17.

[0039] Referring to Figure 5 , in some embodiments of the present invention, an elastic rubber sleeve 47 is fixedly connected to the outer peripheral surface of the sealing convex ring 18. Sealing ring grooves 48 are provided on both sides of the first ventilation hole 12 on the central tube 6. Sealing rings or sealing packing for sealing between the central tube 6 and the inner ring 20 are installed in the sealing ring grooves 48. This structure can prevent the gas in the hollow elastic rubber ring 10 from leaking, so as to keep the state of the hollow elastic rubber ring 10 unchanged when it bulges.

[0040] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A leakage-proof magnetic separator, comprising a frame (1), an electromagnetic generating device (2) being arranged on the frame (1), the electromagnetic generating device (2) having a vertically arranged material pipeline (3), an electromagnetic coil (4) being arranged in the electromagnetic generating device (2) surrounding the material pipeline (3), and a magnetic conductive module (5) being installed in the material pipeline (3) and capable of moving up and down, characterized in that: The magnetic conductive module (5) comprises a central tube (6) which is arranged vertically and has a closed lower end, a plurality of mesh brackets (7) spaced apart from each other in an upper and lower direction are connected to the central tube (6), a magnetic conductive mesh (8) is mounted on the mesh bracket (7), an annular mounting groove (9) is provided at the outer edge of the mesh bracket (7), a hollow elastic rubber ring (10) is mounted in the annular mounting groove (9), a connecting pipe (11) is provided on the hollow elastic rubber ring (10), a first vent hole (12) is provided on the central tube (6), an air flow channel (13) is provided on the mesh bracket (7), and the connecting pipe (11), the air flow channel (13) and the first vent hole (12) are connected in sequence; The center tube (6) is provided with a spacing sleeve (14) at a position between adjacent mesh brackets (7), the spacing sleeve (14) is provided with an air outlet hole (15), the center tube (6) is provided with a second air vent (16), the second air vent (16) is connected to the air outlet hole (15), the first air vent (12) and the second air vent (16) on the center tube (6) are alternately arranged up and down, and a core column (17) capable of sliding up and down is installed in the center tube (6), and the core column (17) is axially spaced. A plurality of sealing convex rings (18) are provided, and a connecting hole (19) is provided on the sealing convex ring (18) which passes through the upper and lower end surfaces thereof. The stem (17) has two upper and lower working positions. When the stem (17) is located at the first working position, the outer peripheral surface of the sealing convex ring (18) blocks the second vent hole (16) and opens the first vent hole (12); when the stem (17) is located at the second working position, the outer peripheral surface of the sealing convex ring (18) blocks the first vent hole (12) and opens the second vent hole (16).

2. The leakage-proof magnetic separator according to claim 1, characterized in that: The mesh support (7) comprises an inner ring (20) and an outer ring (21), a plurality of support tubes (22) are arranged between the inner ring (20) and the outer ring (21), two ends of the support tubes (22) are respectively fixedly connected to the inner ring (20) and the outer ring (21), the support tubes (22) divide the space between the inner ring (20) and the outer ring (21) into a plurality of fan-shaped installation areas (23), and a magnetic conductive mesh (8) is installed in each fan-shaped installation area (23).

3. The leakage-proof magnetic separator according to claim 2, characterized in that: The magnetic conductive mesh sheet (8) comprises a fan-shaped frame (24), a plurality of cross-arranged ribs (25) are connected inside the fan-shaped frame (24), the gaps between the ribs (25) form mesh holes, and the outer sides of two straight sides of the fan-shaped frame (24) close to the upper surface are each connected to an ear plate (26).

4. The leakage-proof magnetic separator according to claim 2, characterized in that: The inner ring (20) is provided with an inner ring through hole (27), the outer ring (21) is provided with an outer ring through hole (28), and the inner cavity of the support tube (22) is connected to the inner ring through hole (27) and the outer ring through hole (28) to form the airflow channel (13).

5. The leakage-proof magnetic separator according to claim 1, characterized in that: A feed pipe (29) is provided at the upper end of the material pipe (3), the lower end of the feed pipe (29) extends into the material pipe (3), an inner support frame (30) is provided inside the feed pipe (29), the magnetic conductive module (5) is fixedly mounted on the inner support frame (30), an outer support frame (31) is provided outside the feed pipe (29), the outer support frame (31) is located above the electromagnetic generating device (2), the outer support frame (31) is connected to the electromagnetic generating device (2) via a plurality of elastic connecting mechanisms (32) distributed around the feed pipe (29), and a vibration motor (33) is mounted on the outer support frame (31).

6. The leakage-proof magnetic separator according to claim 5, characterized in that: The elastic connection mechanism (32) comprises a spring (34) and a cushion block (35) arranged between the outer support frame (31) and the electromagnetic generating device (2), and also comprises a connecting bolt (36); the cushion block (35) is fixedly connected to the electromagnetic generating device (2); the spring (34) is located between the outer support frame (31) and the cushion block (35); the outer support frame (31) and the cushion block (35) are respectively provided with a through hole (37) and a threaded hole (38); the connecting bolt (36) passes through the through hole (37) and is screwed into the threaded hole (38).

7. The leakage-proof magnetic separator according to claim 1, characterized in that: The central tube (6) comprises a first connecting tube (39), a second connecting tube (40), a third connecting tube (41), and a lower connecting head (42) which are connected in sequence from top to bottom. The mesh support (7) is mounted on the third connecting tube (41). A first position-limiting retaining ring (49) is provided at a position above the first sealing convex ring (18) on the core column (17). An inner retaining ring (50) is provided in the second connecting tube (40). The core column (17) passes through a center hole of the inner retaining ring (50). The inner retaining ring (50) is used to limit the first position-limiting retaining ring (49) when the core column (17) slides upward. The inner retaining ring (50) is provided with A vent hole (51) passes through the upper and lower end surfaces thereof, a second limit stop ring (52) is provided at the lower end of the stem (17), a limit groove (53) is provided in the lower connector (42), the bottom of the limit groove (53) is used to limit the second limit stop ring (52) when the stem (17) slides downward, a sealing portion (54) is provided at the upper end of the first connecting tube (39) for sealing with the stem (17), a trachea joint (43) is provided at a portion of the first connecting tube (39) below the sealing portion (54), and a stem driving device (44) for driving the stem (17) to slide up and down is installed at the upper end of the first connecting tube (39).

8. The leakage-proof magnetic separator according to claim 7, characterized in that: The stem (17) comprises a first connecting column (45) and a second connecting column (46) which are connected in sequence from top to bottom, the sealing convex ring (18) is arranged on the second connecting column (46), and the upper end of the first connecting column (45) is connected to the power output end of the stem drive device (44).

9. The leakage-proof magnetic separator according to claim 1, characterized in that: An elastic rubber sleeve (47) is fixedly connected to the outer peripheral surface of the sealing convex ring (18), and sealing ring grooves (48) are provided at the upper and lower sides of the first vent hole (12) on the central tube (6), and a sealing ring or sealing filler is installed in the sealing ring groove (48).

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