Composite layer stainless steel magnetic conductive sleeve

Abstract

The utility model discloses a kind of composite layer stainless steel magnetic conductive sleeve, it is related to magnetic conductive sleeve technical field, including screw cap, one end of the screw cap is fixedly connected with connecting sleeve, the outside of the connecting sleeve is fixedly connected with magnetic shield, the magnetic shield is fixedly connected with positioning bolt at the end away from screw cap, the magnetic shield is made of multilayer composite material, respectively for outer layer, middle layer and inner layer, the magnetic shield and the connecting sleeve junction are equipped with mounting mechanism, the mounting mechanism includes annular groove, the annular groove is symmetrically opened in the inside of connecting sleeve, the inside of the magnetic shield both sides is symmetrically opened with elastic cavity.The utility model discloses a kind of composite layer stainless steel magnetic conductive sleeve, by the mounting mechanism of setting, magnetic shield can be quickly installed on connecting sleeve, avoid the processing effect of magnetic conductive sleeve to appear greater difference due to different welding temperature, and multilayer composite material gives consideration to surface hardness, wear resistance and the high magnetic conductivity of core, simple structure, stronger practicality.

Description

Technical Field

[0001] This utility model relates to the field of magnetic sleeve technology, and in particular to a composite layer stainless steel magnetic sleeve. Background Technology

[0002] Stainless steel magnetic sleeves are widely used in electromagnetic equipment such as motors, transformers, and sensors. Their main function is to guide and concentrate magnetic lines of force, improve the efficiency of the magnetic circuit, and at the same time, utilize the corrosion resistance and high strength of stainless steel to meet the requirements of long-term use under complex working conditions.

[0003] Currently, most common magnetic sleeves are made of a single material, ferritic stainless steel or carbon steel with surface treatment.

[0004] Based on the aforementioned technologies, the applicant believes that although single ferritic stainless steel has certain corrosion resistance and magnetic permeability, the single material structure makes it difficult to simultaneously achieve surface hardness, wear resistance, and high magnetic permeability of the core. Moreover, existing connection methods are mostly welding, and different welding temperatures may lead to significant differences in the processing effect of the magnetic sleeve, thereby increasing the production cost of the magnetic sleeve. In response to the above problems, we have introduced a composite layer stainless steel magnetic sleeve. Utility Model Content

[0005] This utility model discloses a composite layer stainless steel magnetic sleeve, which aims to solve the technical problem that although ferritic stainless steel has certain corrosion resistance and magnetic permeability, the single material structure is difficult to simultaneously achieve surface hardness, wear resistance and high magnetic permeability of the core. Moreover, the existing connection methods are mostly welding, and different welding temperatures may lead to significant differences in the processing effect of the magnetic sleeve, thereby increasing the production cost of the magnetic sleeve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A composite layer stainless steel magnetic sleeve includes a threaded sleeve, one end of which is fixedly connected to a connecting sleeve. A magnetic shielding sleeve is fixedly connected to the outer side of the connecting sleeve. A positioning bolt is fixedly connected to the end of the magnetic shielding sleeve away from the threaded sleeve. The magnetic shielding sleeve is made of a multi-layer composite material, consisting of an outer layer, a middle layer, and an inner layer. An installation mechanism is provided at the connection between the magnetic shielding sleeve and the connecting sleeve. The installation mechanism includes an annular groove, which is symmetrically formed inside the connecting sleeve. Elastic cavities are symmetrically formed on both sides of the interior of the magnetic shielding sleeve. A spring is provided inside each elastic cavity. A limiting plate is fixedly connected to the top of the spring. The limiting plate is slidably connected to the elastic cavity. A limiting slide post is fixedly connected to the side of the limiting plate away from the spring. The limiting slide post is slidably connected to the magnetic shielding sleeve. One side of the top of the limiting slide post is arc-shaped. The limiting slide post and the annular groove cooperate with each other.

[0007] The installation mechanism allows for quick installation of the magnetic shielding sleeve onto the connecting sleeve, preventing significant differences in the processing effect of the magnetic sleeve due to varying welding temperatures. Furthermore, the multi-layer composite material balances surface hardness, wear resistance, and high magnetic permeability of the core, resulting in a simple structure and strong practicality.

[0008] In a preferred embodiment, the outer layer is made of martensitic stainless steel with high strength and hardness, the middle layer is mainly made of high-purity ferritic stainless steel with high magnetic permeability and high saturation magnetic induction, and the inner layer is mainly made of austenitic stainless steel with high corrosion resistance.

[0009] By defining the magnetic shielding sleeve as a three-layer composite structure consisting of an outer, middle, and inner layer, and specifying the materials of each layer, an optimal combination of performance is achieved. The outer layer uses high-strength and high-hardness martensitic stainless steel, effectively improving the wear resistance and mechanical impact resistance of the magnetic shielding sleeve surface; the middle layer uses high-purity ferritic stainless steel with high magnetic permeability and high saturation magnetic induction intensity, ensuring the high efficiency of the magnetic circuit in the core of the magnetic shielding sleeve; the inner layer uses austenitic stainless steel with high corrosion resistance, significantly enhancing the corrosion resistance of the magnetic shielding sleeve in harsh environments. This layered design allows a single component to simultaneously meet the stringent requirements of high strength, high magnetic permeability, and high corrosion resistance.

[0010] In a preferred embodiment, a sealing groove is provided on the side of the connecting sleeve away from the threaded sleeve, and a sealing ring is fixedly connected to the outer wall of the magnetic shielding sleeve. The sealing ring and the sealing groove cooperate with each other.

[0011] A sealing structure consisting of a sealing groove and a sealing ring is added at the connection between the connecting sleeve and the magnetic shielding sleeve. This design effectively prevents external dust, moisture or other contaminants from entering the interior of the magnetic shielding sleeve through the connection gap, thereby protecting the internal precision structure, improving the sealing performance and long-term reliability of the entire magnetic shielding sleeve, and is especially suitable for humid or dusty industrial environments.

[0012] In a preferred embodiment, an annular sealing slot is provided on one side of the inner wall of the connecting sleeve, and the sealing slot and the magnetic shielding sleeve are used in conjunction with each other.

[0013] An annular sealing slot is provided on the inner wall of the connecting sleeve, allowing it to precisely mate with the end of the magnetic shielding sleeve. This plug-in structure not only provides initial positioning, facilitating subsequent alignment of the installation mechanism, but also creates a synergistic sealing effect with the sealing ring, further enhancing the sealing performance of the connection interface and ensuring the overall integrity of the structure.

[0014] In a preferred embodiment, the outer layer, middle layer, and inner layer are composited through a metallurgical bonding method.

[0015] The outer, middle, and inner layers are composited through metallurgical bonding, avoiding problems such as delamination and peeling that may occur with physical bonding. This ensures the overall stability and durability of the multi-layer structure under stress or temperature changes, making the magnetic sleeve more reliable.

[0016] In a preferred embodiment, the axis of the positioning bolt coincides with the axis of the threaded sleeve.

[0017] The alignment of the positioning bolt's axis with the threaded sleeve's axis ensures excellent coaxiality of the entire magnetic sleeve when installed on the equipment. This contributes to the uniform distribution of magnetic lines of force, reduces magnetic circuit losses, and ensures stable performance and high efficiency of the electromagnetic equipment.

[0018] The composite layer stainless steel magnetic sleeve provided by this utility model has the following advantages: Firstly, the installation mechanism allows for quick installation of the magnetic shielding sleeve onto the connecting sleeve, preventing significant differences in the processing effect of the magnetic sleeve due to varying welding temperatures. Furthermore, the multi-layer composite material balances surface hardness, wear resistance, and high magnetic permeability of the core, resulting in a simple structure and strong practicality.

[0019] Secondly, a sealing structure consisting of a sealing groove and a sealing ring is added at the connection between the connecting sleeve and the magnetic shielding sleeve. This design effectively prevents external dust, moisture, or other contaminants from entering the magnetic shielding sleeve through the connection gap, thereby protecting the internal precision structure, improving the sealing performance and long-term reliability of the entire magnetic shielding sleeve, and is especially suitable for humid or dusty industrial environments. An annular sealing slot is provided on the inner wall of the connecting sleeve to precisely fit the end of the magnetic shielding sleeve. This plug-in structure not only provides initial positioning, facilitating subsequent alignment of the installation mechanism, but also forms a synergistic sealing effect with the sealing ring, further enhancing the sealing effect of the connection interface and ensuring the integrity of the structure. The outer, middle, and inner layers are composited through metallurgical bonding, avoiding delamination and peeling problems that may occur with physical bonding, ensuring the overall stability and durability of the multi-layer structure under stress or temperature changes, making the performance of the magnetic shielding sleeve more reliable. The axis of the positioning bolt is aligned with the axis of the threaded sleeve, ensuring excellent coaxiality of the entire magnetic shielding sleeve when installed on the equipment. This helps to distribute magnetic field lines evenly, reduce magnetic circuit losses, and ensure the stable performance and efficiency of electromagnetic equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a composite layer stainless steel magnetic sleeve proposed in this utility model.

[0021] Figure 2 This is a three-dimensional cross-sectional schematic diagram of a composite layer stainless steel magnetic sleeve proposed in this utility model.

[0022] Figure 3 This is a three-dimensional cross-sectional view of a composite layer stainless steel magnetic conductive sleeve proposed in this utility model.

[0023] Figure 4 This is a three-dimensional cross-sectional view of a composite layer stainless steel magnetic sleeve proposed in this utility model.

[0024] Figure 5 This utility model proposes a composite layer stainless steel magnetic sleeve. Figure 3 A magnified diagram of point A.

[0025] Figure 6 This is a schematic diagram of the layering of a composite layer stainless steel magnetic sleeve proposed in this utility model.

[0026] In the attached diagram: 1. Screw sleeve; 2. Connecting sleeve; 3. Magnetic shielding sleeve; 4. Positioning bolt; 5. Outer layer; 6. Middle layer; 7. Inner layer; 8. Annular groove; 9. Elastic cavity; 10. Spring; 11. Limiting plate; 12. Limiting slide; 13. Sealing groove; 14. Sealing ring; 15. Sealing slot. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0028] The composite layer stainless steel magnetic sleeve disclosed in this utility model is mainly used in the application of magnetic sleeves.

[0029] Reference Figure 1 - Figure 6A composite layer stainless steel magnetic sleeve includes a threaded sleeve 1, a connecting sleeve 2 fixedly connected to one end of the threaded sleeve 1, a magnetic shielding sleeve 3 fixedly connected to the outer side of the connecting sleeve 2, and a positioning bolt 4 fixedly connected to the end of the magnetic shielding sleeve 3 away from the threaded sleeve 1. The magnetic shielding sleeve 3 is made of multi-layer composite material, consisting of an outer layer 5, a middle layer 6, and an inner layer 7. An installation mechanism is provided at the connection between the magnetic shielding sleeve 3 and the connecting sleeve 2. The installation mechanism includes an annular groove 8, which is symmetrically opened inside the connecting sleeve 2. Elastic cavities 9 are symmetrically opened on both sides inside the magnetic shielding sleeve 3. A spring 10 is provided inside the elastic cavity 9. A limiting plate 11 is fixedly connected to the top of the spring 10. The limiting plate 11 is slidably connected to the elastic cavity 9. A limiting slide post 12 is fixedly connected to the side of the limiting plate 11 away from the spring 10. The limiting slide post 12 is slidably connected to the magnetic shielding sleeve 3. The top side of the limiting slide post 12 is arc-shaped. The limiting slide post 12 and the annular groove 8 cooperate with each other. The outer layer 5 is made of martensitic stainless steel with high strength and hardness, the middle layer 6 is mainly made of high-purity ferritic stainless steel with high magnetic permeability and high saturation magnetic induction intensity, and the inner layer 7 is mainly made of austenitic stainless steel with high corrosion resistance.

[0030] In this embodiment: When the magnetic shielding sleeve 3 needs to be installed onto the connecting sleeve 2, the end of the magnetic shielding sleeve 3 is aligned with the opening of the connecting sleeve 2 and inserted. During this process, the arc-shaped top of the limiting slide post 12 will first contact the inner wall of the connecting sleeve 2. After being compressed, the limiting slide post 12 drives the limiting plate 11 to compress the spring 10 and slide into the elastic cavity 9. When the magnetic shielding sleeve 3 is installed in place, that is, when the limiting slide post 12 moves to the position of the annular groove 8, the compressed spring 10 releases its elastic force, pushing the limiting plate 11 and the limiting slide post 12 outward, so that the end of the limiting slide post 12 is stuck into the annular groove 8, thereby realizing the mechanical interlock between the magnetic shielding sleeve 3 and the connecting sleeve 2, completing a quick and secure connection. The magnetic sleeve 3 is securely installed, with the sealing ring 14 embedded in the sealing groove 13 and the end of the magnetic sleeve 3 engaging with the sealing slot 15 to form an effective seal. The multi-layered magnetic sleeve 3 effectively guides magnetic lines of force. The ferritic stainless steel of the middle layer 6 provides high magnetic permeability, while the outer layer 5 and martensitic stainless steel provide protection, and the austenitic stainless steel of the inner layer 7 resists corrosion from the internal medium. Through the set installation mechanism, the magnetic sleeve 3 can be quickly installed on the connecting sleeve 2, avoiding significant differences in the processing effect of the magnetic sleeve due to different welding temperatures. Moreover, the multi-layered composite material takes into account surface hardness, wear resistance, and high magnetic permeability of the core, with a simple structure and strong practicality.

[0031] In the above technical solution, considering that although ferritic stainless steel has certain corrosion resistance and magnetic permeability, a single material structure cannot simultaneously achieve surface hardness, wear resistance, and high magnetic permeability of the core. Furthermore, existing connection methods are mostly welding, and different welding temperatures may lead to significant differences in the processing effect of the magnetic sleeve, thus increasing the production cost of the magnetic sleeve. To solve these problems, the specific operation is as follows: Reference Figure 1 - Figure 6 In a preferred embodiment, a sealing groove 13 is formed on the side of the connecting sleeve 2 away from the threaded sleeve 1, and a sealing ring 14 is fixedly connected to the outer wall of the magnetic shielding sleeve 3. The sealing ring 14 and the sealing groove 13 cooperate with each other. An annular sealing slot 15 is formed on one side of the inner wall of the connecting sleeve 2, and the sealing slot 15 cooperates with the magnetic shielding sleeve 3. The outer layer 5, the middle layer 6, and the inner layer 7 are composited by metallurgical bonding. The axis of the positioning bolt 4 coincides with the axis of the threaded sleeve 1.

[0032] In this embodiment, a sealing structure consisting of a sealing groove 13 and a sealing ring 14 is added at the connection between the connecting sleeve 2 and the magnetic shielding sleeve 3. This design effectively prevents external dust, moisture, or other contaminants from entering the magnetic shielding sleeve through the connection gap, thereby protecting the internal precision structure, improving the sealing performance and long-term reliability of the entire magnetic shielding sleeve, and is especially suitable for humid or dusty industrial environments. An annular sealing slot 15 is provided on the inner wall of the connecting sleeve 2, allowing it to precisely fit with the end of the magnetic shielding sleeve 3. This plug-in structure not only provides initial positioning, facilitating subsequent alignment of the installation mechanism, but also forms a synergistic sealing effect with the sealing ring 14, further enhancing the sealing effect of the connection interface and ensuring the integrity of the structure. The outer layer 5, middle layer 6, and inner layer 7 are composited through a metallurgical bonding method, avoiding problems such as delamination and peeling that may occur with physical bonding, ensuring the overall stability and durability of the multi-layer structure under stress or temperature changes, and making the performance of the magnetic shielding sleeve more reliable. The axis of the positioning bolt 4 coincides with the axis of the threaded sleeve 1, ensuring excellent coaxiality of the entire magnetic sleeve when installed on the equipment. This contributes to the uniform distribution of magnetic lines of force, reduces magnetic circuit losses, and ensures the stable performance and working efficiency of the electromagnetic equipment.

[0033] Working principle: When the magnetic shielding sleeve 3 needs to be installed onto the connecting sleeve 2, the end of the magnetic shielding sleeve 3 is aligned with the opening of the connecting sleeve 2 and inserted. During this process, the arc-shaped top of the limiting slide post 12 will first contact the inner wall of the connecting sleeve 2. After being compressed, the limiting slide post 12 drives the limiting plate 11 to compress the spring 10 and slide into the elastic cavity 9. When the magnetic shielding sleeve 3 is installed in place, that is, when the limiting slide post 12 moves to the position of the annular groove 8, the compressed spring 10 releases its elastic force, pushing the limiting plate 11 and the limiting slide post 12 outward, so that the end of the limiting slide post 12... The magnetic sleeve 3 is inserted into the annular groove 8, thereby achieving mechanical interlocking between the magnetic shielding sleeve 3 and the connecting sleeve 2, completing a quick and secure installation. At the same time, the sealing ring 14 is embedded in the sealing groove 13, and the end of the magnetic shielding sleeve 3 cooperates with the sealing slot 15 to form an effective seal. During operation, the magnetic sleeve is fixed in the equipment by the threaded sleeve 1 and the positioning bolt 4. Its multi-layered magnetic shielding sleeve 3 effectively guides magnetic lines of force. The ferritic stainless steel of the middle layer 6 plays a high magnetic permeability role, while the outer layer 5 and martensitic stainless steel provide protection, and the austenitic stainless steel of the inner layer 7 resists the corrosion of the internal medium.

[0034] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A composite layer stainless steel magnetic sleeve, comprising a threaded sleeve (1), characterized in that: One end of the threaded sleeve (1) is fixedly connected to a connecting sleeve (2), and a magnetic shielding sleeve (3) is fixedly connected to the outside of the connecting sleeve (2). A positioning bolt (4) is fixedly connected to the end of the magnetic shielding sleeve (3) away from the threaded sleeve (1). The magnetic shielding sleeve (3) is made of multi-layer composite material, consisting of an outer layer (5), a middle layer (6), and an inner layer (7). An installation mechanism is provided at the connection between the magnetic shielding sleeve (3) and the connecting sleeve (2). The installation mechanism includes an annular groove (8), which is symmetrically opened inside the connecting sleeve (2). The magnetic shielding sleeve (3) has elastic cavities (9) symmetrically opened on both sides inside. The elastic cavity (9) is provided with a spring (10). The top of the spring (10) is fixedly connected to a limiting plate (11). The limiting plate (11) is slidably connected to the elastic cavity (9). The side of the limiting plate (11) away from the spring (10) is fixedly connected to a limiting slide post (12). The limiting slide post (12) is slidably connected to the magnetic shielding sleeve (3). The top side of the limiting slide post (12) is arc-shaped. The limiting slide post (12) and the annular groove (8) cooperate with each other.

2. The composite layer stainless steel magnetic sleeve according to claim 1, characterized in that: The outer layer (5) is made of martensitic stainless steel with high strength and hardness, the middle layer (6) is mainly made of high-purity ferritic stainless steel with high magnetic permeability and high saturation magnetic induction intensity, and the inner layer (7) is mainly made of austenitic stainless steel with high corrosion resistance.

3. The composite layer stainless steel magnetic sleeve according to claim 1, characterized in that: The connecting sleeve (2) has a sealing groove (13) on the side away from the screw sleeve (1), and a sealing ring (14) is fixedly connected to the outer wall of the magnetic shielding sleeve (3). The sealing ring (14) and the sealing groove (13) cooperate with each other.

4. The composite layer stainless steel magnetic sleeve according to claim 1, characterized in that: The inner wall of the connecting sleeve (2) is provided with an annular sealing slot (15), and the sealing slot (15) and the magnetic shielding sleeve (3) are used in conjunction with each other.

5. The composite layer stainless steel magnetic sleeve according to claim 1, characterized in that: The outer layer (5), middle layer (6) and inner layer (7) are composited through metallurgical bonding.

6. The composite layer stainless steel magnetic sleeve according to claim 1, characterized in that: The axis of the positioning bolt (4) coincides with the axis of the threaded sleeve (1).

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