Integrated inner magnet of magnetic drive pump for special environment

Abstract

The invention discloses an integrated inner magnet of a magnetic drive pump for a special environment. The integrated inner magnet comprises an inner magnetic steel sleeve, a permanent magnet and coating plastic, the inner magnetic steel sleeve is positioned in the permanent magnet and is connected with the permanent magnet; and the coating plastic cement is positioned inside and outside the inner magnetic steel sleeve, coats the inner and outer surfaces of the inner magnetic steel sleeve and the permanent magnet, and is fixed on the surfaces of the inner magnetic steel sleeve and the permanent magnet through glue. According to the integrated inner magnet of the magnetic drive pump for the special environment, the inner magnetic steel sleeve and the permanent magnet form a cylindrical shape, and the design of flanges protruding out of the two ends is omitted, so that the inner magnet can be completely wrapped with the wrapping plastic, splicing gaps of the wrapping plastic are reduced, and the overall performance of the magnetic drive pump is improved. Meanwhile, the penetrating through holes are formed in the inner magnetic steel sleeve and the permanent magnet, the pressure difference between the interior and the exterior of the inner magnet is reduced, it is guaranteed that the wrapping plastic can be attached to the permanent magnet and the inner magnetic steel sleeve, the service life of the inner magnet is prolonged, and the bearing capacity of the inner magnet to the extreme environment is improved.

Description

Technical Field

[0001] This invention relates to an integrated internal magnet of a magnetic pump for special environments. Background Technology

[0002] Currently, magnetic pumps are widely used in the chemical industry due to their advantages such as high temperature and corrosion resistance, strong power system leading to high speed and power. Also, because they are often used in special liquids, the structural requirements of magnetic pumps are becoming more and more stringent, and the speed requirements are becoming more and more demanding.

[0003] Because magnetic pumps are driven by electromagnetic force, the frictional force when the impeller rotates is very small. For ease of assembly, the inner magnet is always assembled using an inner magnetic steel sleeve, with the permanent magnet embedded in the outer circle of the steel sleeve. This increases the overall strength of the inner magnet and ensures its stability. However, magnetic pumps are used in special environments, such as extreme environments with high temperatures, strong acids, and strong alkalis. To protect the inner magnet, it is usually wrapped with a protective plastic layer inside and out to isolate it from corrosive solutions such as strong acids and alkalis. However, the plastic is attached to the surface of the inner magnet by adhesive. If it is immersed in the solution for a long time, the performance of the adhesive will be affected, leading to the detachment of the outer plastic and ultimately affecting the service life of the inner magnet.

[0004] Meanwhile, the plastic coating of the inner magnet is both inside and outside. Traditional double-sided coating can only adopt a split structure, and the plastic joints are more prone to wear and tear, affecting the use. If a one-piece coating is adopted, the pressure difference between the inside and outside of the inner magnet will result in different pressure on the plastic surface, which can easily lead to blistering and other phenomena, also affecting the use of the inner magnet.

[0005] The working environment is becoming increasingly extreme. Magnetic pumps are designed to solve the problem of use in extreme environments and have advantages in use with special liquids. However, the traditional structure can no longer meet the requirements for long-term stable use. Therefore, there is an urgent need to update the traditional internal magnet structure to meet the current market requirements. Summary of the Invention

[0006] The present invention aims to provide an integrated inner magnet for a magnetic pump for special environments. By adopting an integrated inner magnet structure, a through mounting hole is provided on the inner magnet sleeve to balance the pressure difference between the inside and outside of the inner magnet. At the same time, the outer plastic is integrally molded and covers the inside and outside of the inner magnet, reducing splicing gaps and improving the service life of the inner magnet.

[0007] To address the aforementioned problems, the present invention provides an integrated internal magnet for a magnetic pump used in special environments, employing the following technical solution: An integrated inner magnet of a magnetic pump for special environments includes an inner magnetic steel sleeve, a permanent magnet, and a plastic coating; the inner magnetic steel sleeve is located inside the permanent magnet and connected to it; the plastic coating is located inside and outside the inner magnetic steel sleeve, covering the inner and outer surfaces of the inner magnetic steel sleeve and the permanent magnet, and is fixed to the surfaces of the inner magnetic steel sleeve and the permanent magnet by adhesive. The inner magnetic steel sleeve is provided with flanges at both ends, and the flanges are fixed at both ends of the inner magnetic steel sleeve to limit the position of the permanent magnet; the width of the permanent magnet is the same as the height of the flange, forming a complete cylindrical shape with the inner magnetic steel sleeve; through holes are provided on the inner magnetic steel sleeve and the permanent magnet, and the through holes penetrate the inner magnetic steel sleeve and the permanent magnet.

[0008] Furthermore, a first limiting platform is provided on the inner wall of both end faces of the plastic coating, which cooperates with the inner magnetic sleeve to fix the plastic coating.

[0009] Furthermore, multiple first limiting platforms are provided, arranged in a ring on the inner side of both end faces of the plastic coating, and cooperate with the flange surface of the inner magnetic steel sleeve.

[0010] Furthermore, each of the first limiting platforms is a ring-shaped protrusion arranged on the inner wall of both end faces of the plastic coating.

[0011] Furthermore, a second limiting platform is provided on the inner circle of the plastic-coated body to engage with the inner magnet and its internal rotating shaft, thereby fixing the position of the entire inner magnet.

[0012] Furthermore, multiple second limiting platforms are provided, evenly distributed in a ring array on the inner circular surface of the plastic coating, protruding towards the center; at least two second limiting platforms are provided in one axial position.

[0013] Furthermore, a third limiting groove is provided on the axial inner wall of the plastic coating. The third limiting groove is recessed in the inner wall of the plastic coating, and multiple of them are provided in a ring distribution to cooperate with the inner magnetic sleeve.

[0014] Furthermore, multiple through holes are provided, evenly distributed in a ring array on the inner magnetic steel sleeve and the permanent magnet. Each through hole penetrates both the inner magnetic steel sleeve and the permanent magnet, and the number and position of the through holes are consistent between the two.

[0015] Furthermore, the outer surfaces of the two flanges of the inner magnetic steel sleeve are provided with first limiting grooves. Multiple first limiting grooves are provided and distributed in a ring on the surface of the flanges, which cooperate with the plastic coating to limit the position of the plastic coating.

[0016] Furthermore, a third limiting platform is provided on the inner wall of the inner magnetic steel sleeve. The third limiting platform is distributed in a ring on the inner wall of the inner magnetic steel sleeve, protruding towards the center, and cooperates with the covering plastic.

[0017] The beneficial effects of this invention are as follows: The integrated inner magnet of the magnetic pump for special environments provided by this invention forms a cylindrical shape by integrating the inner magnetic steel sleeve and the permanent magnet, eliminating the flange design at both ends. This allows the plastic coating to completely wrap around the inner magnet, reducing the gaps in the plastic coating. At the same time, through holes are provided on the inner magnetic steel sleeve and the permanent magnet to reduce the pressure difference between the inside and outside of the inner magnet, ensuring that the plastic coating can adhere to the permanent magnet and the inner magnetic steel sleeve, thereby improving the service life of the inner magnet and its ability to withstand extreme environments. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Appendix Figure 2 This is a front sectional view of the present invention.

[0020] Among them: 1. Inner magnetic steel sleeve, 2. Permanent magnet, 3. Plastic coating, 4. Flange, 5. Through hole, 6. First limiting platform, 7. Second limiting platform, 8. Third limiting platform, 9. First limiting groove, 10. Third limiting groove. Detailed Implementation

[0021] To better understand the technical solution provided by this invention, the invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] As shown in the attached figure, the present invention provides an integrated inner magnet of a magnetic pump for special environments, comprising an inner magnetic steel sleeve 1, a permanent magnet 2, and a plastic coating 3; the inner magnetic steel sleeve 1 is located inside the permanent magnet 2 and is connected to the permanent magnet 2; the plastic coating 3 is located inside and outside the inner magnetic steel sleeve 1, covering the inner and outer surfaces of the inner magnetic steel sleeve 1 and the permanent magnet 2, and is fixed to the surfaces of the inner magnetic steel sleeve 1 and the permanent magnet 2 by adhesive; The inner magnetic steel sleeve 1 is provided with flanges 4 at both ends. The flanges 4 are fixed to both ends of the inner magnetic steel sleeve 1 to limit the position of the permanent magnet 2. The width of the permanent magnet 2 is the same as the height of the flanges 4, forming a complete cylindrical shape with the inner magnetic steel sleeve 1. Through holes 5 are provided on the inner magnetic steel sleeve 1 and the permanent magnet 2, and the through holes 5 penetrate the inner magnetic steel sleeve 1 and the permanent magnet 2.

[0023] Furthermore, a first limiting platform 6 is provided on the inner wall of both end faces of the plastic coating 3, which cooperates with the inner magnetic sleeve 1 to fix the plastic coating 3.

[0024] Furthermore, multiple first limiting platforms 6 are provided, arranged in a ring on the inner side of both end faces of the plastic covering 3, and cooperate with the flange 4 surface of the inner magnetic sleeve 1.

[0025] Furthermore, each of the first limiting platforms 6 is annularly protruding and arranged on the inner wall of both end faces of the plastic coating 3.

[0026] Furthermore, a second limiting platform 7 is provided on the inner circle of the plastic coating 3, which is used to match the inner magnet with its internal rotating shaft to fix the position of the entire inner magnet.

[0027] Furthermore, multiple second limiting platforms 7 are provided, evenly distributed in a ring array on the inner circular surface of the plastic coating 3, and protruding towards the center; at least two second limiting platforms 7 are provided in one axial position.

[0028] Furthermore, a third limiting groove 10 is provided on the axial inner wall of the plastic coating 3. The third limiting groove 10 is recessed in the inner wall of the plastic coating 3, and multiple of them are provided in a ring distribution, which cooperate with the inner magnetic sleeve 1.

[0029] Furthermore, multiple through holes 5 are provided, and they are evenly distributed in a ring array on the inner magnetic steel sleeve 1 and the permanent magnet 2. Each through hole 5 penetrates the inner magnetic steel sleeve 1 and the permanent magnet 2, and the number and position of the through holes 5 are consistent in both.

[0030] Furthermore, the outer surfaces of the two flanges 4 of the inner magnetic sleeve 1 are provided with first limiting grooves 9. Multiple first limiting grooves 9 are provided and are distributed in a ring on the surface of the flanges 4, which cooperate with the covering plastic 3 to limit the position of the covering plastic 3.

[0031] Furthermore, a third limiting platform 8 is provided on the inner wall of the inner magnetic steel sleeve 1. The third limiting platform 8 is distributed in a ring on the inner wall of the inner magnetic steel sleeve 1, protruding towards the center, and cooperates with the covering plastic 3.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. An integrated inner magnet for a magnetic drive pump for special environments, characterized in that, It comprises an inner magnetic steel sleeve, a permanent magnet and a plastic coating, the inner magnetic steel sleeve is located inside the permanent magnet and connected with the permanent magnet, the plastic coating is located inside and outside the inner magnetic steel sleeve and coats the inner and outer surfaces of the inner magnetic steel sleeve and the permanent magnet and is fixed on the surfaces of the inner magnetic steel sleeve and the permanent magnet by glue; The flanges are fixed on the two ends of the inner magnetic steel sleeve and used for limiting the position of the permanent magnet, the width of the permanent magnet is consistent with the height of the flanges and the inner magnetic steel sleeve forms a complete cylindrical shape, and through holes are arranged on the inner magnetic steel sleeve and the permanent magnet and penetrate the inner magnetic steel sleeve and the permanent magnet.

2. The integrated inner magnet of a magnetic drive pump for special environments according to claim 1, characterized in that, First limiting platforms are arranged on the inner walls of the two side end surfaces of the plastic coating and matched with the inner magnetic steel sleeve and used for fixing the plastic coating.

3. The integrated inner magnet of a magnetic drive pump for special environments according to claim 2, characterized in that, The first limiting platforms are arranged in multiple and annularly distributed on the inner sides of the two side end surfaces of the plastic coating and matched with the flange surfaces of the inner magnetic steel sleeve.

4. The integrated inner magnet of a magnetic drive pump for special environments according to claim 3, characterized in that, Each first limiting platform is annularly protruded and arranged on the inner wall of the two side end surfaces of the plastic coating.

5. The integrated inner magnet of a magnetic drive pump for special environments according to claim 1, characterized in that, Second limiting platforms are arranged on the inner circle of the plastic coating and used for matching the inner magnet with the shaft inside the inner magnet and fixing the position of the entire inner magnet.

6. The integrated inner magnet of a magnetic drive pump for special environments according to claim 5, characterized in that, The second limiting platforms are arranged in multiple and annularly and uniformly distributed on the inner circle surface of the plastic coating and protruded towards the center, and no less than two second limiting platforms are arranged on an axial position.

7. The integrated inner magnet of a magnetic drive pump for special environments according to claim 1, characterized in that, Third limiting grooves are arranged on the axial inner wall of the plastic coating, the third limiting grooves are recessed on the inner wall of the plastic coating and arranged in multiple and annularly distributed and matched with the inner magnetic steel sleeve.

8. The integrated inner magnet of a magnetic drive pump for special environments according to claim 1, characterized in that, The through holes are arranged in multiple and annularly and uniformly distributed on the inner magnetic steel sleeve and the permanent magnet, each through hole penetrates the inner magnetic steel sleeve and the permanent magnet, and the number and position of the through holes of the two are consistent.

9. The integrated inner magnet of a magnetic drive pump for special environments according to claim 1, characterized in that, First limiting grooves are arranged on the outer surfaces of the two flanges of the inner magnetic steel sleeve, the first limiting grooves are arranged in multiple and annularly distributed on the surfaces of the flanges and matched with the plastic coating and used for limiting the position of the plastic coating.

10. The integrated inner magnet of a magnetic drive pump for special environments according to claim 1, characterized in that, Third limiting platforms are arranged on the inner wall of the inner magnetic steel sleeve, the third limiting platforms are annularly distributed on the inner wall of the inner magnetic steel sleeve and protruded towards the center and matched with the plastic coating.

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