Leakage-proof magnetic separator

Abstract

The invention belongs to the technical field of magnetic separation equipment, and particularly discloses a leakage-proof magnetic separator which comprises a rack, an electromagnetic generation device is arranged on the rack, the electromagnetic generation device is provided with a vertically-arranged material pipeline, an electromagnetic coil is arranged in the electromagnetic generation device, and a magnetic conduction module capable of moving up and down is installed in the material pipeline. The magnetic conductive module comprises a central pipe, a plurality of mesh supports are connected to the central pipe, magnetic conductive meshes are mounted on the mesh supports, annular mounting grooves are formed in the outer edges of the mesh supports, hollow elastic rubber rings are mounted in the annular mounting grooves, and connecting pipes are arranged on the hollow elastic rubber rings. And the connecting pipe is communicated with the central pipe through an airflow channel arranged on the mesh bracket. According to the magnetic separator, the magnetic conduction module and the mounting structure thereof are improved, the gap between the mesh support and the material pipeline can be blocked in the magnetic separation stage, the problem that materials directly leak downwards through the gap between the magnetic conduction mesh and the material pipeline is solved, and the iron removal effect of the magnetic separator is improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic separation equipment, and in particular to a leakage-proof magnetic separator. Background Art

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

[0003] The working process of the magnetic separator mainly includes the magnetic separation stage and the iron removal stage. Magnetic separation stage: The electromagnetic coil is energized to generate a magnetic field, and the magnetic mesh on the magnetic module is magnetized; when the material passes through the material pipeline, the ferromagnetic material is adsorbed on the magnetic mesh, and the remaining material flows downward through the mesh holes of the magnetic mesh. Iron removal stage: After the magnetic separation stage, a large amount of ferromagnetic material will be adsorbed on the magnetic mesh. At this time, it is necessary to stop feeding the material into the material pipeline, then the electromagnetic coil is powered off, the magnetic mesh loses magnetism, the vibration motor is started, the magnetic module shakes up and down, and the ferromagnetic material adsorbed on the magnetic mesh falls off.

[0004] The magnetic separator can be used for iron removal and purification of materials with high iron removal efficiency. However, the following problems still exist during use: During the magnetic separation stage, most of the material flows downward through the mesh holes of the magnetic mesh. In the process of passing through the layers of magnetic mesh, the ferromagnetic material in the material is fully adsorbed by the magnetic mesh. However, due to the active gap between the magnetic mesh and the inner wall of the material pipeline, a small part of the material will directly leak downward through the gap between the magnetic mesh and the material pipeline. The ferromagnetic material in this part of the material is not fully removed, which affects the overall iron removal effect. Summary of the invention

[0005] The purpose of the present invention is to provide a leakage-proof magnetic separator to solve the problem in the prior art that part of the material will directly leak downward through the gap between the magnetic conductive mesh and the material pipeline, resulting in insufficient iron removal.

[0006] To achieve the above-mentioned purpose, the present invention discloses a leakage-proof magnetic separator, comprising 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 surrounding the material pipeline, a magnetic conductive module that can move up and down is installed in the material pipeline, the magnetic conductive module comprises a vertically arranged central tube with a closed lower end, a plurality of mesh brackets spaced up and down are connected to the central tube, a magnetic conductive mesh is installed on the mesh bracket, an annular mounting groove is provided at the outer edge of the mesh bracket, a hollow elastic rubber ring is installed in the annular mounting groove, a connecting pipe is provided on the hollow elastic rubber ring, a first air vent is provided on the central tube, an air flow channel is provided on the mesh bracket, and the connecting pipe, the air flow channel and the first air vent are connected in sequence. Through the above improvements, gas can be filled into the center tube before the magnetic separation stage, and the gas enters the inner cavity of the hollow elastic rubber ring. After the hollow elastic rubber ring swells, it contacts the inner wall of the material pipeline, thereby blocking the gap between the mesh bracket and the material pipeline to prevent the material from leaking directly downward without passing through the magnetic mesh. In this way, the material can only flow downward after being fully iron-removed by the magnetic mesh, thereby improving the overall iron removal effect. In the iron removal stage, the gas in the center tube can be discharged, so that the hollow elastic rubber ring can be deflated and retracted into the annular mounting groove, and the magnetic module can resume the state of being able to move up and down, which is convenient for shaking off the ferromagnetic material adsorbed on the magnetic mesh.

[0007] Furthermore, a spacing sleeve is provided at a portion of the center tube between adjacent mesh supports, the spacing sleeve is provided with an air outlet, a second air hole is provided on the center tube, the second air hole is connected to the air outlet, the first air hole and the second air hole on the center tube are alternately arranged up and down, a core column that can slide up and down is installed in the center tube, a plurality of sealing convex rings are axially spaced apart on the core column, the sealing convex ring is provided with a connecting hole passing through the upper and lower end faces thereof, the core column has two upper and lower working positions, when the core column is located at the first working position, the outer peripheral surface of the sealing convex ring blocks the second air hole and opens the first air hole, when the core column is located at the second working position, the outer peripheral surface of the sealing convex ring blocks the first air hole and opens the second air hole. After adopting the above structure, the core column can be slid to the first working position first, and air can be ventilated into the center tube, and the hollow elastic rubber ring enters the inflated state. The inflated hollow elastic rubber ring blocks the gap between the mesh bracket 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 vent hole to keep the inflated state of the hollow elastic rubber ring unchanged. At this time, air can be ventilated into the center tube again, and the airflow can flow to the gap between the mesh brackets through the second vent hole, which is conducive to promoting the passage of materials. In the iron removal stage, the core column can be slid to the first working position first, and the hollow elastic rubber ring is exhausted and retracted. Next, the core column is slid to the second working position. At this time, air can be ventilated into the center tube again, and the airflow enters the gap between the mesh brackets, which is conducive to promoting the ferromagnetic material to fall off from the magnetic conductive mesh.

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

[0009] Furthermore, the magnetic mesh sheet includes a fan-shaped frame, a plurality of cross-arranged ribs are connected in the fan-shaped frame, the gaps between the ribs form meshes, and an ear plate is connected to each of the two straight sides of the fan-shaped frame near the upper surface. After adopting the above structure, when the magnetic mesh sheet is placed in the fan-shaped installation area, the two ear plates are respectively clamped on the two support tubes, which facilitates the fixation of the magnetic mesh sheet.

[0010] Furthermore, the inner ring is provided with an inner ring through hole, the outer ring is provided with an outer ring through hole, and the inner cavity of the support tube is connected with the inner ring through hole and the outer ring through hole to form the airflow channel. After adopting the above structure, it is only necessary to punch the inner ring through hole and the outer ring through hole on the inner ring and the outer ring respectively, so that the two are connected with the inner cavity of the support tube to form the airflow channel, which is convenient for processing.

[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 mounted 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 is connected to the electromagnetic generating device through a plurality of elastic connecting mechanisms distributed around the feed pipe, and a vibration motor is installed on the outer support frame. After adopting the above structure, the magnetic conductive module has an elastic activity space through the connection of the elastic connecting mechanism, and starting the vibration motor can make the magnetic conductive module vibrate up and down to promote the detachment of the ferromagnetic material from the magnetic conductive mesh.

[0012] Furthermore, the elastic connection mechanism includes a spring and a pad disposed between the outer support frame and the electromagnetic generating device, and also includes a connecting bolt. The pad is fixedly connected to the electromagnetic generating device, and the spring is located between the outer support frame and the pad. The outer support frame and the pad are respectively provided with a through hole and a threaded hole, and the connecting bolt passes through the through hole and is screwed into the threaded hole. After adopting the above structure, the outer support frame can move up and down by utilizing the cooperation between the connecting bolt and the through hole, and the spring can provide elastic support to the outer support frame, so that the magnetic conductive module can move up and down elastically with the feed pipe.

[0013] Furthermore, the central tube includes a first connecting tube, a second connecting tube, a third connecting tube, and a lower connecting head which are connected in sequence from top to bottom, the mesh bracket is installed on the third connecting tube, a first limit stop ring is provided at a position on the core column above the first sealing convex ring, an inner stop ring is provided in the second connecting tube, the core column passes through the center hole of the inner stop ring, the inner stop ring is used to limit the first limit stop ring when the core column slides upward, the inner stop ring is provided with an air vent which passes through the upper and lower end surfaces thereof, a second limit stop ring is provided at the lower end of the core column, a limit groove is provided in the lower connecting head, the bottom of the limit groove is used to limit the second limit stop ring when the core column slides downward, a sealing portion which is sealed with the core column is provided at the upper end portion of the first connecting tube, an air pipe joint is provided at a position on the first connecting tube below the sealing portion, and 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 stem driving device can drive the stem to slide up and down, changing the working position of the stem. The inner retaining ring and the bottom of the limiting groove are respectively used to limit the upward and downward movement of the stem, limiting the stem to the second working position and the first working position.

[0014] Furthermore, the stem comprises a first connecting column and a second connecting column connected in sequence from top to bottom, the sealing convex ring is arranged on the second connecting column, and the upper end of the first connecting column is connected to the power output end of the stem driving device. After adopting the above structure, the stem is extended by connecting the first connecting column and the second connecting column, and the connection with the power output end of the stem driving device is realized, and the installation of the stem is convenient.

[0015] Furthermore, an elastic rubber sleeve is fixedly connected to the outer peripheral surface of the sealing convex ring, and the central tube is provided with sealing ring grooves at the upper and lower sides of the first vent hole, and a sealing ring or sealing filler is installed in the sealing ring groove. With the above structure, the gas leakage in the hollow elastic rubber ring can be prevented to keep the hollow elastic rubber ring unchanged when it is bulged.

[0016] To sum up, the beneficial effects of the present invention are as follows: by improving the magnetic module and its installation structure, the present invention can seal the gap between the mesh bracket and the material pipeline in the magnetic separation stage without affecting the up and down movement of the magnetic module in the iron removal stage, so that the material can only flow downward through the mesh holes of the magnetic mesh, which not only solves the problem of the material directly leaking downward through the gap between the magnetic mesh and the material pipeline, but also enables the ferromagnetic material in the material to be fully adsorbed by the magnetic mesh, thereby improving the iron removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 It is a three-dimensional diagram of the lower half of the magnetic conductive module of the present invention; Figure 3 yes Figure 2 A cross-sectional view of the magnetic conductive module part in a working state; Figure 4 yes Figure 2 A cross-sectional view of the magnetic conductive module part in another working state; Figure 5 yes Figure 3 Detailed diagram of the connection structure between the mesh support and the central tube shown in; Figure 6 is a three-dimensional diagram of a partial structure of a core column in an embodiment of the present invention; Figure 7 It is a schematic diagram of a mesh support and a magnetic mesh installation structure in one embodiment of the present invention; Figure 8 It is a schematic diagram of the structure of a magnetic conductive mesh sheet in one embodiment of the present invention; Fig. 9 yes Figure 1 A magnified view of part A in FIG. Fig.10 It is a structural schematic diagram of a magnetic conductive module in an embodiment of the present invention.

[0018] In the figure: 1, frame, 2, electromagnetic generating device, 3, material pipeline, 4, electromagnetic coil, 5, magnetic conductive module, 6, center tube, 7, mesh bracket, 8, magnetic conductive mesh, 9, annular mounting groove, 10, hollow elastic rubber ring, 11, connecting pipe, 12, first vent hole, 13, air flow channel, 14, spacing sleeve, 15, air outlet hole, 16, second vent hole, 17, core column, 18, sealing convex ring, 19, connecting hole, 20, inner ring, 21, outer ring, 22, support tube, 23, fan-shaped mounting area, 24, fan-shaped frame, 25, rib sheet, 26, ear plate, 27, inner ring through hole, 28, outer ring through hole 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 limit stop ring, 50, inner stop ring, 51, air vent, 52, second limit stop ring, 53, limit groove, 54, sealing part. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 In some embodiments of the present invention, the leakage-proof magnetic separator includes a frame 1, an electromagnetic generator 2 is provided on the frame 1, the electromagnetic generator 2 has a vertically arranged material pipeline 3, an electromagnetic coil 4 is provided in the electromagnetic generator 2 around the material pipeline 3, and a magnetic conductive module 5 that can move up and down is installed in the material pipeline 3. The magnetic conductive module 5 includes a central tube 6 that is vertically arranged and closed at the lower end, a plurality of mesh brackets 7 spaced up and down are connected to the central tube 6, a magnetic conductive mesh 8 is installed on the mesh bracket 7, an annular mounting groove 9 is provided at the outer edge of the mesh bracket 7, and a hollow elastic rubber ring 10 is installed in the annular mounting groove 9. The hollow elastic rubber ring 10 is provided with a connecting tube 11, the inner cavity of the connecting tube 11 is communicated with the inner cavity of the hollow elastic rubber ring 10, the central tube 6 is provided with a first vent hole 12, the mesh support 7 is provided with an air flow channel 13, the connecting tube 11 extends into the first end of the air flow channel 13 and the outer wall of the connecting tube 11 is fixedly sealed and connected with the inner wall of the air flow channel 13, and the second end of the air flow channel 13 is communicated with the first vent hole 12. The connecting tube 11, the air flow channel 13, and the first vent hole 12 are communicated in sequence, so that the inner cavity of the hollow elastic rubber ring 10 is communicated with the inner cavity of the central tube 6.

[0021] When the anti-leakage magnetic separator is in use: before entering the magnetic separation stage, gas can be filled into the central tube 6, and the gas enters the inner cavity of the hollow elastic rubber ring 10. The hollow elastic rubber ring 10 swells and contacts the inner wall of the material pipeline 3. The swollen hollow elastic rubber ring 10 blocks the gap between the mesh bracket 7 and the material pipeline 3, which can prevent the material from leaking directly downward without passing through the magnetic mesh 8. In this way, the material can only flow downward after being fully iron-removed by the magnetic mesh 8, thereby improving the overall iron removal effect. In the iron removal stage, the gas in the central tube 6 can be discharged, so that the hollow elastic rubber ring 10 can be deflated and retracted into the annular mounting groove 9, and the magnetic module 5 can resume the state of being able to move up and down, so as to facilitate shaking off the ferromagnetic material adsorbed on the magnetic mesh 8. The inflation state of the hollow elastic rubber ring 10 can be referred to. Figure 4 The state of the hollow elastic rubber ring 10 after deflation can be referred to Figure 3 .

[0022] Reference Figure 4 , Figure 5 , Figure 6In some embodiments of the present invention, a spacing sleeve 14 is provided at a portion of the center tube 6 between adjacent mesh supports 7, and an air outlet 15 is provided on the spacing sleeve 14. A second air vent 16 is provided on the center tube 6, and the second air vent 16 is connected to the air outlet 15. The first air vent 12 and the second air vent 16 on the center tube 6 are alternately arranged up and down. A core column 17 that can slide up and down is installed in the center tube 6, and a plurality of sealing convex rings 18 are axially spaced on the core column 17, and a connecting hole 19 that passes through the upper and lower end surfaces of the sealing convex ring 18 is provided on the core column 17. The core column 17 has two upper and lower working positions. When the core column 17 is located in the first working position, the outer peripheral surface of the sealing convex ring 18 blocks the second air vent 16 and opens the first air vent 12. When the core column 17 is located in the second working position, the outer peripheral surface of the sealing convex ring 18 blocks the first air vent 12 and opens the second air vent 16. The state of the core column 17 when it is in the first working position can be referred to. Figure 4 The state of the stem 17 when it is in the second working position can be referred to Figure 3 . After further improvement, the leakage-proof magnetic separator can first slide the core column 17 to the first working position when in use, ventilate the central tube 6, and 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 vent hole 12 to keep the inflated state of the hollow elastic rubber ring 10 unchanged. At this time, the central tube 6 is ventilated again, and the airflow can flow to the gap between the mesh supports 7 through the second vent hole 16, which is conducive to promoting the passage of materials. In the iron discharge stage, the core column 17 can be slid to the first working position first, and the hollow elastic rubber ring 10 is exhausted and retracted. Next, the core column 17 is slid to the second working position, and the central tube 6 is ventilated again. The airflow enters the gap of the mesh support 7, which is conducive to promoting the ferromagnetic material to fall off from the magnetic conductive mesh 8.

[0023] Reference Figure 7 , Figure 8In some embodiments of the present invention, the mesh support 7 includes an inner ring 20 and an outer ring 21, and a plurality of support tubes 22 are arranged between the inner ring 20 and the outer ring 21, and the two ends of the support tube 22 are fixedly connected to the inner ring 20 and the outer ring 21 respectively, and the support tube 22 divides the space between the inner ring 20 and the outer ring 21 into a plurality of fan-shaped installation areas 23, and a magnetic mesh 8 is installed in each fan-shaped installation area 23. After the above improvements, the magnetic mesh 8 on the mesh support 7 can be replaced, so that the magnetic mesh 8 with different meshes can be replaced according to the different materials. By installing magnetic meshes 8 with different meshes on the upper and lower mesh supports 7, both the iron removal efficiency and the iron removal effect can be taken into account. For example, the mesh size of the magnetic mesh 8 installed on the uppermost mesh support 7 to the lowermost mesh support 7 is gradually reduced; or the mesh size of the magnetic mesh 8 installed on the upper several layers of mesh support 7 is larger than the mesh size of the magnetic mesh 8 installed on the lower several layers of mesh support 7. Through such a setting, the mesh size of the upper magnetic mesh 8 is large, which is conducive to the passage of materials and is used for preliminary magnetic separation; the mesh size of the lower magnetic mesh 8 is small, which is conducive to the adsorption of ferromagnetic materials and is used for further magnetic separation, which not only has high iron removal efficiency, but also has good iron removal effect.

[0024] Reference Figure 7 , Figure 8 In some embodiments of the present invention, the magnetic mesh 8 includes 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 meshes, and the outer sides of the two straight sides of the fan-shaped frame 24 close to the upper surface are each connected with an ear plate 26. When the magnetic mesh 8 is placed in the fan-shaped installation area 23, the two ear plates 26 are respectively clamped on the two support tubes 22, which facilitates the fixation of the magnetic mesh 8. In other embodiments of the present invention, a through hole can be set on the ear plate 26, and a fixing nut can be welded on the upper surface of the support tube 22, so that the fastening bolt passes through the through hole and is screwed into the fixing nut, so that the magnetic mesh 8 and the mesh bracket 7 are relatively fixed.

[0025] Reference Figure 5 In some embodiments of the present invention, 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 with the inner ring through hole 27 and the outer ring through hole 28 to form the airflow channel 13. After the above improvement, it is only necessary to punch the inner ring through hole 27 and the outer ring through hole 28 on the inner ring 20 and the outer ring 21 respectively, so that the two are connected with the inner cavity of the support tube 22 to form the airflow channel 13, which is more convenient to process.

[0026] Reference Fig. 9In some embodiments of the present invention, a feed pipe 29 is provided at the upper end of the material pipeline 3, and the lower end of the feed pipe 29 extends into the feed pipe 29. An inner support frame 30 is provided inside the feed pipe 29, and 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, and 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 through a plurality of elastic connection mechanisms 32 distributed around the feed pipe 29, and a vibration motor 33 is installed on the outer support frame 31. Through the connection of the elastic connection mechanism, the magnetic conductive module 5 has an elastic activity space, and starting the vibration motor 33 can make the magnetic conductive module 5 vibrate up and down to promote the detachment of the ferromagnetic material from the magnetic conductive mesh 8. The inner support frame 30 is a hollow structure up and down, which is used to fix the magnetic conductive module 5 on the feed pipe 29 without affecting the passage of the material through the feed pipe 29.

[0027] Reference Fig. 9 In some embodiments of the present invention, the elastic connection mechanism 32 includes a spring 34 and a pad 35 provided between the outer support frame 31 and the electromagnetic generator 2, and also includes a connecting bolt 36. The pad 35 is fixedly connected to the electromagnetic generator 2. The spring 34 is located between the outer support frame 31 and the pad 35. The outer support frame 31 and the pad 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. The outer support frame 31 can move up and down by the cooperation between the connecting bolt 36 and the through hole 37. The spring 34 can provide elastic support to the outer support frame 31, so that the magnetic conductive module 5 can move up and down elastically with the feed pipe 29.

[0028] Reference Fig.10In 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 which are connected in sequence from top to bottom. The mesh bracket 7 is installed on the third connecting tube 41. A first limit stop ring 49 is provided at a position above the first sealing convex ring 18 on the core column 17. An inner stop ring 50 is provided in the second connecting tube 40. The core column 17 passes through the center hole of the inner stop ring 50. The inner stop ring 50 is used to limit the first limit stop ring 49 when the core column 17 slides upward. The inner stop ring 50 is provided with an air vent 51 which passes through the upper and lower end surfaces thereof. A second limit stop ring 52 is provided at the lower end of the core column 17. A limit groove 53 is provided in the lower connecting head 42. The bottom of the limit groove 53 is used to limit the second limit stop 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 stem driving device 44 can drive the stem 17 to slide up and down, changing the working position of the stem 17. The inner retaining ring 50 and the bottom of the limiting groove 53 are used to limit the upward and downward movement of the stem 17, respectively, and limit the stem 17 to the second working position and the first working position. The upper end of the first connecting tube 39 is provided with a sealing portion 54 that is sealed with the stem 17. The sealing portion 54 is provided with an annular inner cavity, and the annular inner cavity is filled with sealing fillers, thereby achieving the sealing between the first connecting tube 39 and the stem 17. The first connecting tube 39 is provided with an air pipe joint 43 at the part below the sealing portion 54. The air pipe joint 43 is used to connect the air intake and exhaust device, and the air is inflated into the center tube 6 or the gas in the center tube 6 is discharged through the air pipe joint 43.

[0029] Reference Fig.10 In some embodiments of the present invention, the stem 17 includes a first connecting column 45 and a second connecting column 46 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 driving device 44. After adopting the above structure, the stem 17 is extended by connecting the first connecting column 45 and the second connecting column 46, and the connection with the power output end of the stem driving device 44 is realized, and the installation of the stem 17 is convenient.

[0030] Reference 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, and sealing ring grooves 48 are provided on the upper and lower sides of the first vent hole 12 of the center tube 6. A sealing ring or sealing filler for sealing between the center tube 6 and the inner ring 20 is installed in the sealing ring groove 48. This structure can prevent gas leakage in the hollow elastic rubber ring 10 to keep the hollow elastic rubber ring 10 unchanged when it is bulging.

[0031] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection 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. The central tube (6) is connected to a plurality of mesh brackets (7) spaced apart from each other in an upper and lower direction. 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). The connecting pipe (11), the air flow channel (13) and the first vent hole (12) are sequentially connected.

2. The leakage-proof magnetic separator according to claim 1, characterized in that: 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).

3. 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).

4. The leakage-proof magnetic separator according to claim 3, 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).

5. The leakage-proof magnetic separator according to claim 3, 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).

6. 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 pipeline (3), the lower end of the feed pipe (29) extends into the feed pipe (29), 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).

7. The leakage-proof magnetic separator according to claim 6, 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).

8. The leakage-proof magnetic separator according to claim 2, 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).

9. The leakage-proof magnetic separator according to claim 8, 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).

10. The leakage-proof magnetic separator according to claim 2, 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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