Magnetic drive spring excitation vibrating screen

Abstract

The utility model provides a magnetically-driven spring-excited vibrating screen, which is characterized in that a rack is supported at the bottom, and a plurality of support columns are arranged at the upper end of the rack; the screen is arranged right above the rack; the multiple ball joints are distributed on the periphery of the lower portion of the screen corresponding to the multiple supporting columns, and bases of the ball joints are fixedly connected with the lower end of the screen. The magnetic drive spring component comprises a reset spring, a permanent magnet, an iron core and a spiral coil, the permanent magnet and the iron core are arranged at the top and the bottom of an inner cavity of the reset spring at intervals, and the spiral coil is arranged in the reset spring and is rotationally connected to the outer portion of the iron core in a winding mode; the magnetic drive spring components are arranged between the ball joints and the supporting columns in a one-to-one correspondence mode, the upper ends of the reset springs and the upper ends of the permanent magnets are fixedly connected with the ball head connecting rods, and the lower ends of the reset springs and the lower ends of the iron cores are fixedly connected with the supporting columns. According to the vibrating screen, the service life of the screen mesh can be remarkably prolonged, and the screening effect and the screening efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ore screening, in particular to a magnetically driven spring-excited vibrating screen. Background Art

[0002] Vibration screening equipment is a widely used mechanical equipment in the ore mining and processing industry. The working principle of the traditional structure is that the motor drives the exciter to move, and in this way, the exciting force is generated, so that the screen surface vibrates with a certain amplitude, and then the material moves with the screen surface, and finally the purpose of screening is achieved. Usually, the vibrating screen is classified according to the movement trajectory of the screen surface. Common ones include reciprocating linear vibrating screen, torsional vibrating screen, elliptical vibrating screen and circular vibrating screen.

[0003] In traditional vibrating screens, the impact force of materials on the screen is relatively large. Therefore, the screen is easy to wear during the screening process. After the screen is worn, the screening effect will be seriously reduced, and the machine needs to be stopped to replace the screen. This will affect the screening efficiency of the vibrating screen and the normal operation of other equipment on the production process line, while increasing the maintenance cost. In addition, there will be certain safety hazards when manually replacing the screen. In addition, when using traditional vibrating screens for actual screening operations, the material distribution on the screen is uncontrollable, making the material uneven everywhere. Limited by the structure of the existing vibrating screen, the movement trajectory of the entire screen is often fixed, so it is impossible to perform local regulation in real time, which greatly affects the screening effect. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a magnetically driven spring-excited vibrating screen, which can significantly increase the service life of the screen, which is beneficial to improving operating efficiency, while reducing maintenance costs and improving the safety factor of operations.

[0005] In order to achieve the above-mentioned object, the utility model provides a magnetically driven spring-excited vibrating screen, comprising a frame, a screen, a ball joint and a magnetically driven spring component;

[0006] The frame is supported at the bottom, and has a plurality of support columns at its upper end;

[0007] The screen is arranged directly above the frame;

[0008] The ball joint is composed of a base and a ball head connecting rod; a plurality of ball joints are distributed around the lower part of the screen corresponding to a plurality of support columns, and the base of the ball joint is fixedly connected to the lower end of the screen;

[0009] The magnetic drive spring component includes a return spring, a permanent magnet, an iron core and a spiral coil. The permanent magnet and the iron core are arranged at intervals at the top and bottom of the inner cavity of the return spring. The spiral coil is arranged inside the return spring and is wound and connected to the outside of the iron core.

[0010] Multiple magnetic drive spring components are arranged one by one between multiple ball joints and multiple support columns, and the upper end of the reset spring and the upper end of the permanent magnet are fixedly connected to the ball head connecting rod, and the lower end of the reset spring and the lower end of the iron core are fixedly connected to the support column.

[0011] Furthermore, in order to ensure the connection strength of the connection, the base of the ball joint is connected to the lower end of the screen by welding.

[0012] Furthermore, in order to avoid mutual interference between the return spring and the permanent magnet during movement, the permanent magnet is cylindrical.

[0013] Furthermore, in order to ensure that the magnetic field generated by the spiral coil when energized can interact more efficiently with the magnetic field generated by the permanent magnet, the permanent magnet, the iron core and the spiral coil are all coaxially arranged.

[0014] As a preference, the number of the ball joints, the number of the magnetic drive spring components, and the number of the support columns are all four.

[0015] In the utility model, the permanent magnet and the iron core are arranged at intervals at the top and bottom of the inner cavity of the reset spring, and a spiral coil is wound around the outside of the iron core. At the same time, the upper end of the reset spring and the upper end of the permanent magnet are connected to the ball joint connected to the screen, and the lower end of the reset spring and the lower end of the iron core are connected to the support column. In this way, when an alternating current of a certain frequency is passed through the spiral coil, the spiral coil can generate an alternating magnetic field, and the magnetic field can be strengthened by the iron core, so that a changing strengthened magnetic field can be obtained. When the changing strengthened magnetic field interacts with the magnetic field of the permanent magnet, it will drive the screen to vibrate at a corresponding frequency through periodic attraction and repulsion, and then the material on the screen can be screened by the effect of vibration. Through the setting of the ball joint, when the spiral coils on different magnetic drive spring components are applied with alternating currents of different sizes, it can be ensured that the screen as a whole will not be affected by the torsional force. By utilizing the non-contact interaction of the magnetic field and the elastic support of the reset spring, the impact force of the material on the screen can be effectively reduced during the operation, which can significantly increase the service life of the screen, which is conducive to improving the operation efficiency, while reducing the maintenance cost and increasing the safety factor of the operation. At the same time, using the various magnetic drive spring components used to support the screen as the vibration source, the amplitude of the corresponding position of the screen can be changed by only adjusting the current of a certain spiral coil in real time, so that it is easy to achieve different screening forces at different positions of the screen to achieve a more appropriate screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the magnetic drive spring component in the utility model.

[0018] In the figure: 1. screen, 2. ball joint, 3. magnetic drive spring component, 4. frame, 10. base, 11. ball head connecting rod, 12. permanent magnet, 13. iron core, 14. spiral coil, 15. reset spring, 16. support column. DETAILED DESCRIPTION

[0019] The utility model will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, the utility model provides a magnetically driven spring-excited vibrating screen, comprising a frame 4, a screen 1, a ball joint 2 and a magnetically driven spring component 3;

[0021] The frame 4 is supported at the bottom, and has a plurality of support columns 16 at its upper end;

[0022] The screen 1 is arranged directly above the frame 4, and is arranged obliquely above the frame 4 in a state where the discharge end is lower than the feed end;

[0023] The ball joint 2 is composed of a base 10 and a ball head connecting rod 11; multiple ball joints 2 are distributed around the lower part of the screen 1 corresponding to multiple support columns 16, and the base 10 of the ball joint 2 is fixedly connected to the lower end of the screen 1;

[0024] The magnetic drive spring component 3 includes a return spring 15, a permanent magnet 12, an iron core 13 and a spiral coil 14. The permanent magnet 12 and the iron core 13 are arranged at intervals at the top and bottom of the inner cavity of the return spring 15. The spiral coil 14 is arranged inside the return spring 15 and is wound and connected to the outside of the iron core 13.

[0025] Multiple magnetic drive spring components 3 are arranged one by one between multiple ball joints 2 and multiple support columns 16, and the upper end of the reset spring 15 and the upper end of the permanent magnet 12 are fixedly connected to the ball head connecting rod 11, and the lower end of the reset spring 15 and the lower end of the iron core 13 are fixedly connected to the support column 16.

[0026] In order to ensure the connection strength of the connection, the base 10 of the ball joint 2 is connected to the lower end of the screen 1 by welding.

[0027] In order to avoid mutual interference between the return spring and the permanent magnet during movement, the permanent magnet 12 is cylindrical, wherein the outer diameter of the permanent magnet 12 is smaller than the inner diameter of the inner cavity of the return spring 15 .

[0028] In order to ensure that the magnetic field generated by the spiral coil when energized can interact more efficiently with the magnetic field generated by the permanent magnet, the permanent magnet 12, the iron core 13 and the spiral coil 14 are all coaxially arranged. The distance between the permanent magnet 12 and the iron core 13 satisfies the distance when the magnetic fields of the two interact with each other, so as to avoid that the magnetic field generated by the spiral coil cannot effectively act on the permanent magnet when the distance is too large.

[0029] As a preferred embodiment, the number of the ball joints 2, the number of the magnetic drive spring components 3, and the number of the support columns 16 are all four.

[0030] In the utility model, the permanent magnet and the iron core are arranged at intervals at the top and bottom of the inner cavity of the reset spring, and a spiral coil is wound around the outside of the iron core. At the same time, the upper end of the reset spring and the upper end of the permanent magnet are connected to the ball joint connected to the screen, and the lower end of the reset spring and the lower end of the iron core are connected to the support column. In this way, when an alternating current of a certain frequency is passed through the spiral coil, the spiral coil can generate an alternating magnetic field, and the magnetic field can be strengthened by the iron core, so that a changing strengthened magnetic field can be obtained. When the changing strengthened magnetic field interacts with the magnetic field of the permanent magnet, it will drive the screen to vibrate at a corresponding frequency through periodic attraction and repulsion, and then the material on the screen can be screened by the effect of vibration. Through the setting of the ball joint, when the spiral coils on different magnetic drive spring components are applied with alternating currents of different sizes, it can be ensured that the screen as a whole will not be affected by the torsional force. By utilizing the non-contact interaction of the magnetic field and the elastic support of the reset spring, the impact force of the material on the screen can be effectively reduced during the operation, which can significantly increase the service life of the screen, which is conducive to improving the operation efficiency, while reducing the maintenance cost and increasing the safety factor of the operation. At the same time, using the various magnetic drive spring components used to support the screen as the vibration source, the amplitude of the corresponding position of the screen can be changed by only adjusting the current of a certain spiral coil in real time, so that it is easy to achieve different screening forces at different positions of the screen to achieve a more appropriate screening effect.

[0031] The use process of a magnetically driven spring-excited vibrating screen in this application is as follows:

[0032] Step 1: Start the vibrating screen;

[0033] An alternating current of the same frequency is applied to the spiral coils 4 in the plurality of magnetic drive spring components 3, so that the spiral coils 4 generate an alternating magnetic field, and a changing enhanced magnetic field is formed through the reinforcement of the iron core 13, and the interaction between the changing enhanced magnetic field and the magnetic field of the permanent magnet 12 is utilized to drive the screen 1 to vibrate at a corresponding frequency;

[0034] Step 2: Screening the materials;

[0035] Add the material to be screened onto the screen 1, and use the vibrating screen 1 to screen the material. During this process, the non-contact magnetic field and the elastic effect of the return spring 15 are used to reduce the impact force of the material on the screen 1.

[0036] When the amount of material on the screen 1 is large, the frequency and magnitude of the alternating current on all the spiral coils 4 are increased synchronously, thereby increasing the overall vibration frequency and amplitude of the screen 1 to speed up the screening efficiency;

[0037] When the material distribution in different areas on the screen 1 is uneven, the frequency and magnitude of the alternating current on the spiral coil 4 near the area with more material are increased, so that the vibration frequency and amplitude of the screen 1 in this area are increased, and the material in the area with more material is promoted to flow to the area with less material, so as to improve the screening effect and screening efficiency.

[0038] Through the above use process, the utility model can not only utilize the non-contact magnetic field and the elastic effect of the return spring to reduce the impact force of the material on the screen, thereby extending the service life of the screen, but also when the amount of material is large, it can increase the overall vibration frequency and amplitude of the screen by only adjusting the current of the spiral coil, thereby effectively improving the screening effect and screening efficiency. In addition, when the material is unevenly distributed, it can increase the current of a certain spiral coil to cause the material to flow to a smaller area, thereby improving the screening effect.

Claims

1. A magnetically driven spring-excited vibrating screen, comprising a frame (4) and a screen (1), characterized in that: It also includes a ball joint (2) and a magnetic drive spring component (3); The frame (4) is supported at the bottom, and has a plurality of support columns (16) at its upper end; The screen (1) is arranged directly above the frame (4); The ball joint (2) is composed of a base (10) and a ball head connecting rod (11); a plurality of ball joints (2) are distributed around the lower part of the screen (1) corresponding to a plurality of support columns (16), and the base (10) of the ball joint (2) is fixedly connected to the lower end of the screen (1); The magnetic drive spring component (3) comprises a reset spring (15), a permanent magnet (12), an iron core (13) and a spiral coil (14); the permanent magnet (12) and the iron core (13) are arranged at intervals at the top and bottom of the inner cavity of the reset spring (15); the spiral coil (14) is arranged inside the reset spring (15) and is wound and connected to the outside of the iron core (13); A plurality of magnetically driven spring components (3) are arranged one by one between a plurality of ball joints (2) and a plurality of support columns (16), and the upper end of the return spring (15) and the upper end of the permanent magnet (12) are both fixedly connected to the ball head connecting rod (11), and the lower end of the return spring (15) and the lower end of the iron core (13) are both fixedly connected to the support column (16).

2. The magnetically driven spring-excited vibrating screen according to claim 1, characterized in that: The base (10) of the ball joint (2) is connected to the lower end of the screen (1) by welding.

3. The magnetically driven spring-excited vibrating screen according to claim 2, characterized in that: The permanent magnet (12) is cylindrical.

4. The magnetically driven spring-excited vibrating screen according to claim 3, characterized in that: The permanent magnet (12), the iron core (13) and the spiral coil (14) are all coaxially arranged.

5. The magnetically driven spring-excited vibrating screen according to claim 4, characterized in that: The number of the ball joints (2), the number of the magnetic drive spring components (3), and the number of the support columns (16) are all four.

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