Magnetic field coil insulation structure

Abstract

The utility model relates to the technical field of magnetic field coils, and discloses a magnetic field coil insulation structure which comprises a supporting plate, an installation column is fixedly connected to the upper surface of the middle of the supporting plate, a first fixing ring is fixedly connected to the upper surface of the supporting plate, and a connecting rod is fixedly connected to the outer wall of the first fixing ring. A second fixing ring is fixedly connected to the outer wall of the connecting rod, and the bottom end of the second fixing ring is fixedly connected to the upper surface of the supporting plate. According to the utility model, the polyimide film is additionally arranged in the fixing ring II, so that the possibility that current leaks to the surrounding environment from the coil conductor can be remarkably reduced, a powerful guarantee is provided for maintaining stable magnetic field intensity, and the equipment can accurately complete various detection tasks; in some magnetic field generation equipment with high precision requirement on magnetic field stability, such as a magnetic field coil of nuclear magnetic resonance equipment, the characteristic of the polyimide film plays a crucial role in maintaining stable magnetic field intensity.

Description

TECHNICAL FIELD

[0001] The utility model relates to magnetic field coil technical field especially relates to a magnetic field coil insulation structure. BACKGROUND

[0002] Magnetic field coil insulation structure is mainly to prevent the current from flowing in the place that should not be conducted, it utilizes the high resistance characteristic of insulating material, separates the coil and outside and different coil between, these materials prevent electron migration, reduce the risk of electric leakage and short circuit, ensure that the magnetic field coil normally works.

[0003] But the traditional magnetic field coil insulation structure, in the process of using, usually use rubber as insulating material, in high temperature possibly easy aging, failure, thereby influence the working performance of coil, reduce the service life of equipment, simultaneously cannot reduce the possibility that current leaks from coil conductor to surrounding environment. UTILITY MODEL CONTENTS

[0004] In order to make up for above insufficient, the utility model provides a kind of magnetic field coil insulation structure, to improve the problem that traditional magnetic field coil insulation structure cannot reduce the possibility that current leaks from coil conductor to surrounding environment.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A kind of magnetic field coil insulation structure, including support plate, the middle part upper surface of the support plate is fixedly connected with mounting column, the upper surface of the support plate is fixedly connected with fixed ring one, the outer wall of the fixed ring one is fixedly connected with connecting rod, the outer wall of the connecting rod is fixedly connected with fixed ring two, the bottom of the fixed ring two is fixedly connected on the upper surface of support plate.

[0007] Preferably, the fixed ring two is composed of insulation layer, support layer, gasket layer, moisture-proof layer and installation layer.

[0008] Preferably, the inside of the fixed ring two is fixedly connected with installation layer, the lower surface of the installation layer is fixedly connected with insulation layer, the insulation layer adopts polyimide film.

[0009] Preferably, the lower surface of the insulation layer is fixedly connected with support layer.

[0010] Preferably, the lower surface of the support layer is fixedly connected with gasket layer.

[0011] Preferably, the lower surface of the gasket layer is fixedly connected with moisture-proof layer, and the gasket layer adopts nanometer titanium dioxide material.

[0012] The utility model has the following beneficial effects:

[0013] 1. The utility model discloses a polyimide film is added in the inside of fixed ring no. 2, can reach the possibility of current leakage from coil conductor to surrounding environment is reduced significantly, effectively reduce the electric leakage phenomenon, provide strong guarantee for maintaining stable magnetic field intensity, ensure that equipment can accurately complete each detection task, in some extremely high requirement of magnetic field stability high voltage, high -precision magnetic field generating device, such as nuclear magnetic resonance equipment's magnetic field coil, the characteristic of polyimide film plays the vital role for maintaining stable magnetic field intensity.

[0014] 2. The utility model discloses a nano titanium dioxide material is added in the inside of fixed ring no. 2, can reach the insulation structure can better keep its integrity under the condition of receiving mechanical external force, such as vibration, collision etc., prevent the crack or breakage of insulating layer. DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic diagram of the magnetic field coil insulation structure that the utility model proposes;

[0016] Figure 2 It is fixed ring no. 2 partial structure schematic diagram of the magnetic field coil insulation structure that the utility model proposes;

[0017] Figure 3 It is installation layer partial structure schematic diagram of the magnetic field coil insulation structure that the utility model proposes;

[0018] Figure 4 It is support layer partial structure schematic diagram of the magnetic field coil insulation structure that the utility model proposes.

[0019] Legend:

[0020] 1, support plate;2, mounting column;3, fixed ring no. 1;4, connecting rod;5, fixed ring no. 2;6, insulating layer;7, support layer;8, gasket layer;9, moisture-proof layer;10, installation layer. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the specification of the utility model, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0022] Reference Figures 1-3The utility model provides an embodiment: a kind of magnetic field coil insulation structure, including support plate 1, the upper surface of the middle part of support plate 1 is fixedly connected with mounting column 2, the upper surface of support plate 1 is fixedly connected with fixed ring one 3, the outer wall of fixed ring one 3 is fixedly connected with connecting rod 4, the outer wall of connecting rod 4 is fixedly connected with fixed ring two 5, and the bottom of fixed ring two 5 is fixedly connected on the upper surface of support plate 1;Fixed ring two 5 is composed of insulation layer 6, support layer 7, gasket layer 8, moisture-proof layer 9 and installation layer 10;

[0023] Specifically, support plate 1 is used for fixing mounting column 2, fixed ring one 3 and fixed ring two 5, connecting rod 4 is used for connecting fixed ring one 3 and fixed ring two 5, insulation layer 6 adopts polyimide film, polyimide film has excellent electrical insulation performance, its dielectric constant is low, dielectric loss is small, can effectively prevent the leakage of current in magnetic field coil, prevent short circuit of coil, ensure that magnetic field coil is stable under the working condition of high voltage, high frequency, reduce the electrical fault caused by insulation problem, simultaneously, when magnetic field coil works, heat is generated due to current passing, causes coil temperature to rise, polyimide film has extremely high thermal stability, can be used in 250 DEG C to 280 DEG C air for a long time, short-time use temperature can reach 400 DEG C, can bear high temperature environment without deformation, melting or decomposition, guarantee the reliability of insulation structure under high temperature, prevent the insulation performance from being reduced due to temperature being too high, installation layer 10 adopts acrylic paint, is coated on the surface of coil, forms uniform insulation protective film, enhances insulation performance, prevents electric leakage and short circuit, can also prevent moisture, dust and corrosion, improves coil reliability and service life.

[0024] Refer to Figure 4 The inside of fixed ring two 5 is fixedly connected with insulation layer 6;The lower surface of insulation layer 6 is fixedly connected with support layer 7;

[0025] Specifically, it is used for supporting and fixing insulation layer 6, support layer 7, gasket layer 8, moisture-proof layer 9, installation layer 10, insulation layer 6 adopts polytetrafluoroethylene, polytetrafluoroethylene has good heat resistance, corrosion resistance and non-stick, its dielectric constant is low, helps to reduce coil capacitance, improves high frequency response, is often used in the inner layer insulation of coil such as roth coil which requires high high-frequency performance, support layer 7 adopts epoxy resin, epoxy resin is a thermosetting plastic, and has excellent bonding performance, can firmly bond coil and other components, simultaneously has good heat resistance and electrical insulation performance, can improve the overall stability and insulation performance of coil, is often used in magnetic field coil packaging and fixing which requires high insulation performance and mechanical strength.

[0026] Refer to Figure 3 The lower surface of support layer 7 is fixedly connected with gasket layer 8;The lower surface of gasket layer 8 is fixedly connected with moisture-proof layer 9;

[0027] Specifically, the support layer 7 is used for fixing the gasket layer 8, the gasket layer 8 adopts nano titanium dioxide material, the nano titanium dioxide material can significantly improve the insulation performance of the material, the nano particles can fill the micro defects in the material, prevent the conduction of electrons, thereby improving the insulation resistance and breakdown voltage, and the moisture-proof layer 9 adopts polyvinyl acetal, the polyvinyl acetal has good moisture resistance and insulation performance, and also has certain flexibility, so that the insulation effect can be guaranteed while the slight deformation of the coil under different working conditions is adapted.

[0028] Working principle: when a magnetic field coil insulation structure is needed, polyimide film is added inside the fixed ring two 5, when the magnetic field coil is energized, an electric field will be generated around the conductor. The polyimide film uses its high resistivity to block the electric field lines, preventing the movement of electric charges between conductors at different potentials. If there is no insulation material or the insulation performance is not good between adjacent coil turns, the electric field force will drive the electric charges to move from one coil turn to another, thereby forming a turn-to-turn short circuit. The polyimide film acts as a barrier, keeping the electric charges confined within their respective conductors, ensuring that the current flows in the coil according to the designed path, maintaining the normal generation of the magnetic field. This feature of the polyimide film plays a crucial role in maintaining a stable magnetic field strength in high-voltage, high-precision magnetic field generating equipment that requires extremely high stability, such as nuclear magnetic resonance equipment. By adding the gasket layer 8 inside the fixed ring two 5, the gasket layer 8 adopts nano titanium dioxide material, which can improve the hardness and toughness of the insulation material. When the nano titanium dioxide particles are uniformly dispersed inside the fixed ring two 5, the tensile strength and impact resistance of the material are significantly improved, which enables the insulation structure to better maintain its integrity under mechanical external forces such as vibration, impact, etc., preventing cracks or damage to the insulation layer. This magnetic field coil insulation structure not only significantly reduces the possibility of current leakage from the coil conductor to the surrounding environment, but also enables the insulation structure to better maintain its integrity under mechanical external forces such as vibration, impact, etc., preventing cracks or damage to the insulation layer.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent substitution, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A magnetic field coil insulation structure comprising a support plate (1), characterized in that: The middle upper surface of the support plate (1) is fixedly connected with a mounting column (2), the upper surface of the support plate (1) is fixedly connected with a fixed ring one (3), the outer wall of the fixed ring one (3) is fixedly connected with a connecting rod (4), the outer wall of the connecting rod (4) is fixedly connected with a fixed ring two (5), and the bottom end of the fixed ring two (5) is fixedly connected with the upper surface of the support plate (1).

2. A magnetic field coil insulation structure according to claim 1, wherein: The fixed ring two (5) is composed of an insulation layer (6), a supporting layer (7), a gasket layer (8), a moisture-proof layer (9) and a mounting layer (10).

3. A magnetic field coil insulation structure according to claim 2, wherein: The inside of the fixed ring two (5) is fixedly connected with the mounting layer (10), the lower surface of the mounting layer (10) is fixedly connected with the insulation layer (6), and the insulation layer (6) is made of polyimide film.

4. A magnetic field coil insulation structure according to claim 3, wherein: The lower surface of the insulation layer (6) is fixedly connected with the supporting layer (7).

5. A magnetic field coil insulation structure as defined in claim 4, wherein: The lower surface of the supporting layer (7) is fixedly connected with the gasket layer (8).

6. A magnetic field coil insulation structure as defined in claim 5, wherein: The lower surface of the gasket layer (8) is fixedly connected with the moisture-proof layer (9), and the gasket layer (8) is made of nano titanium dioxide material.

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