Heat insulation coil framework for nuclear magnetic resonance imaging device

Abstract

The utility model discloses a heat insulation coil framework for a nuclear magnetic resonance imaging device, which comprises a framework body and a vacuum cavity arranged in the framework body, and a supporting lining net for preventing the vacuum cavity from deforming is arranged in the vacuum cavity. The supporting lining net is configured to be matched with the vacuum cavity in shape. According to the heat insulation coil framework for the nuclear magnetic resonance imaging device, the supporting lining net is arranged to support the internal space after the vacuum cavity is vacuumized, deformation and damage of the side wall of the vacuum cavity due to insufficient supporting strength are prevented, the thickness of the side wall of the vacuum cavity is not increased, the heat insulation effect is guaranteed, meanwhile, the strength is guaranteed, and the service life of the coil framework is prolonged. The influence on the overall size and weight of the nuclear magnetic resonance imaging device is small, and the weight of the device can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear magnetic resonance components, and more specifically, to a heat-insulating coil skeleton for a nuclear magnetic resonance imaging device. Background Art

[0002] Magnetic resonance imaging devices are widely favored by medical institutions because they can quickly obtain highly accurate stereoscopic images of a patient's internal structures without causing any harm to the patient. The MRI coil is a key component of the MRI system, typically mounted on the outer wall of the coil bobbin and primarily used to generate a magnetic field. To ensure the proper functioning of the MRI magnet, the coil must remain in a superconducting state, defined as a zero-resistance state. Liquid helium is typically used to cool the superconducting coil to maintain this state. To ensure this cooling effect, thermal insulation components are typically installed to minimize the impact of the low temperature of the liquid helium on the environment outside the device.

[0003] The utility model patent with patent application number CN213423447U discloses a nuclear magnetic resonance coil frame, including a cylinder and a coil frame. A separator ring is fixedly connected to the inside of the coil frame. A liquid storage cavity is opened between the separator ring and the inner outer ring of the coil frame. A vacuum cavity is opened between the separator ring and the inner inner ring of the coil frame. The inner side wall of the vacuum cavity is bonded with thermal insulation cotton.

[0004] Although this device is equipped with a vacuum chamber and thermal insulation cotton to prevent the external ambient temperature from transmitting to the liquid helium temperature, and to keep the liquid helium inside the liquid storage chamber warm, in order to ensure the thermal insulation effect of the vacuum chamber, the vacuum chamber of this device needs to be evacuated to a high vacuum state through a vacuum pumping device, and the vacuum chamber will be subjected to the pressure of the external atmospheric pressure; if the side wall of the vacuum chamber is not strong enough to ensure sufficient support strength, the vacuum chamber will be deformed and damaged due to the pressure difference; in order to ensure the thermal insulation effect of the vacuum chamber, the thickness of the side wall of the vacuum chamber that is close to the liquid helium is set to be relatively thin, which makes it difficult to ensure sufficient support strength; at the same time, thickening the side wall of the vacuum chamber will increase the overall weight and thickness of the coil skeleton, further increasing the volume and weight of the nuclear magnetic resonance imaging device. Utility Model Content

[0005] An object of the present invention is to solve the above-mentioned problems and / or disadvantages and to provide advantages as will be described below.

[0006] In order to achieve these objects and other advantages of the present invention, a heat-insulating coil skeleton for a nuclear magnetic resonance imaging device is provided, comprising: a skeleton body, a vacuum cavity disposed within the skeleton body, a supporting lining provided within the vacuum cavity to prevent deformation of the vacuum cavity;

[0007] The support mesh is configured to match the shape of the vacuum chamber.

[0008] Preferably, a plurality of bosses contacting the inner and outer side walls of the vacuum chamber are provided on both sides of the supporting lining mesh.

[0009] Preferably, a heat insulation layer is provided on the inner side wall of the vacuum chamber.

[0010] Preferably, a flexible heat insulation pad is provided on the top of the boss.

[0011] Preferably, the support mesh comprises at least two layers, and each layer comprises at least one spiral support strip;

[0012] The spiral directions of two adjacent layers of spiral support bars are opposite.

[0013] Preferably, the supporting mesh is configured as a closed ring;

[0014] The annular supporting lining mesh includes at least two arc-shaped lining mesh pieces.

[0015] The present invention has at least the following beneficial effects: by arranging a support lining net, the internal space is supported after the vacuum chamber is evacuated, thereby preventing the side wall of the vacuum chamber from being deformed and damaged due to insufficient support strength, and ensuring the heat insulation effect while ensuring its strength without increasing the thickness of the side wall of the vacuum chamber, with little impact on the overall volume and weight of the nuclear magnetic resonance imaging device, which is conducive to reducing the weight of the device.

[0016] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of a thermal insulation coil skeleton for a nuclear magnetic resonance imaging device in one embodiment of the present invention;

[0018] Figure 2 This is a schematic structural diagram of a heat-insulating coil skeleton for a nuclear magnetic resonance imaging device in one embodiment of the present invention;

[0019] Figure 3 This is a partially enlarged cross-sectional view of a heat-insulating coil skeleton for a nuclear magnetic resonance imaging device in one embodiment of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of a support lining net for a thermal insulation coil skeleton used in a nuclear magnetic resonance imaging device in one embodiment of the present invention;

[0021] Figure 5 This is a schematic structural diagram of a heat-insulating coil bobbin boss for a nuclear magnetic resonance imaging device in one embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of a spiral support bar for a thermal insulation coil skeleton for a nuclear magnetic resonance imaging device in one embodiment of the present utility model.

[0023] Markings in the figure: 1, skeleton body, 2, vacuum chamber, 3, support lining, 31, boss, 32, spiral support bar, 4, thermal insulation layer. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0025] It should be understood that terms such as “having,” “including,” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0026] It should be noted that in the description of this utility model, the orientations or positional relationships indicated by terms are based on the orientations or positional relationships shown in the accompanying drawings. This is intended solely to facilitate the description of this utility model and simplify the description. It does not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, it should not be construed as limiting this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Example 1

[0030] A heat-insulating coil frame for a nuclear magnetic resonance imaging device, the structure of which is as follows Figure 1-2 As shown, it comprises: a skeleton body 1, a vacuum cavity 2 arranged in the skeleton body 1, and a supporting lining net 3 is provided in the vacuum cavity 2 to prevent the vacuum cavity 2 from deforming;

[0031] The supporting mesh 3 is configured to match the shape of the vacuum chamber 2 .

[0032] In actual applications, the vacuum chamber 2 is set to be tubular along the extension direction of the skeleton body 1; the support lining mesh 3 is configured to adapt to the shape of the vacuum chamber 2, and the two sides of the support lining mesh 3 are tightly attached to the inner wall of the vacuum chamber 2 to prevent the support lining mesh 3 from loosening during operation and moving relative to the vacuum chamber 2 to generate noise.

[0033] Working principle: During production, the vacuum chamber 2 needs to be evacuated into a vacuum state using a vacuum pump to reduce the temperature transfer medium and prevent the temperature of the liquid helium from rising due to the influence of the external environment. A support lining 3 is provided to support the internal space after the vacuum chamber 2 is evacuated to prevent deformation and damage caused by insufficient support strength of the side walls of the vacuum chamber 2, thereby extending the service life and quality of use of the device. The strength of the side walls of the vacuum chamber 2 is ensured without increasing their thickness, which has little impact on the overall volume and weight of the nuclear magnetic resonance imaging device and is conducive to reducing the weight of the device.

[0034] Example 2

[0035] This embodiment 2 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 1 、 3 As shown in , 4 and 5 , the following improvement is disclosed based on the embodiment 1: a plurality of bosses 31 in contact with the inner and outer side walls of the vacuum chamber 2 are provided on both sides of the supporting lining 3 .

[0036] In actual application, the grids of the support mesh 3 are arranged in a tic-tac-toe shape, and the bosses 31 are arranged at the vertices of each grid.

[0037] Working principle: By setting the boss 31 to contact the inner and outer walls of the cavity for support, the contact area between the support lining 3 and the inner and outer walls of the vacuum chamber 2 is reduced while ensuring the support strength, reducing the temperature transfer through the support lining 3, so that the thermal insulation effect of the vacuum chamber 2 is better.

[0038] Example 3

[0039] This embodiment 3 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 3 As shown, the following improvement is disclosed based on the first embodiment: a heat insulating layer 4 is provided on the inner wall of the vacuum chamber 2 .

[0040] In practical applications, the thermal insulation layer 4 is configured as nano aerogel felt.

[0041] Working principle: By providing the heat-insulating layer 4, the temperature transfer can be further reduced, the heat-insulating effect of the vacuum chamber 2 can be increased, and the temperature of the liquid helium can be prevented from rising due to the influence of the external environment.

[0042] Example 4

[0043] This embodiment 4 is a preferred embodiment of the present invention, which discloses the following improvements based on the embodiment 2: a flexible heat insulation pad is provided on the top of the boss 31.

[0044] In practical applications, the flexible thermal insulation pad is configured as a silicone rubber thermal insulation pad.

[0045] Working principle: By setting a flexible thermal insulation pad, the support lining 3 and the inner wall of the vacuum chamber 2 are always kept in close contact with each other, increasing the friction between the two and avoiding relative displacement between the two during operation; at the same time, it can further reduce temperature transfer and increase the thermal insulation effect of the vacuum chamber 2.

[0046] Example 5

[0047] This embodiment 5 is a preferred embodiment of the present invention, and its specific structure is as follows: Figure 6 As shown, it discloses the following improvements based on embodiment 1: the supporting mesh 3 includes at least two layers, and each layer includes at least one spiral support bar 32;

[0048] The spiral directions of two adjacent layers of spiral support bars 32 are opposite.

[0049] In actual applications, two layers of spiral support strips 32 with the same pitch and opposite directions are provided within the vacuum chamber 2 and secured at their intersections by bonding or other means. When not wound around the vacuum chamber 2, the spiral support strips 32 have a diameter smaller than the vacuum chamber 2, allowing the support mesh 3 formed therefrom to adhere tightly to the inner wall of the vacuum chamber 2.

[0050] Working Principle: When installing the support mesh 3, two spiral support strips 32 with the same pitch and opposite directions are first wound sequentially around the inner wall of the vacuum chamber 2. The two strips are then bonded together at their intersection to prevent deformation and expansion. Finally, the outer wall of the vacuum chamber 2 is installed and the gaps are sealed to form a sealed vacuum chamber 2. The installation of the spiral support strips 32 facilitates the construction of the support mesh 3 and increases the production speed of the coil bobbin. Furthermore, the size of the spiral support strips 32 is not critical; they can be directly configured according to the inner wall of the vacuum chamber 2 during winding. Spiral support strips 32 of the same diameter can also be used to make support meshes 3 of different diameters.

[0051] Example 6

[0052] This embodiment 6 is a preferred embodiment of the present invention, which discloses the following improvements based on embodiment 1: the supporting mesh 3 is configured as a closed ring;

[0053] The annular supporting mesh 3 includes at least two arc-shaped mesh sheets.

[0054] Working Principle: When setting up the support mesh 3, multiple curved mesh sheets are sequentially connected and fixed to the vacuum chamber 2, and are closely attached to the inner wall of the vacuum chamber 2. Finally, the outer wall of the vacuum chamber 2 is set up and the gap is sealed to form a sealed vacuum chamber 2. Multiple curved mesh sheets are assembled and fixed to form a closed ring, which is convenient for manufacturing and processing.

[0055] The above solutions are only examples of preferred embodiments, but are not limited thereto. When implementing the present invention, appropriate replacements and / or modifications can be made according to user needs.

[0056] The number of devices and processing scales described herein are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

[0057] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and exemplary embodiments. They can be applied to a variety of fields suitable for the present invention. Further modifications will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the specific details and illustrations shown and described herein without departing from the general concept defined by the claims and their equivalents.

Claims

1. A thermal insulation coil skeleton for a nuclear magnetic resonance imaging device, comprising: A skeleton body, and a vacuum chamber arranged in the skeleton body, wherein a supporting lining is provided in the vacuum chamber to prevent deformation of the vacuum chamber; The support mesh is configured to match the shape of the vacuum chamber.

2. The heat-insulating coil bobbin for a nuclear magnetic resonance imaging apparatus according to claim 1, wherein: A plurality of bosses in contact with the inner and outer walls of the vacuum chamber are provided on both sides of the supporting lining mesh.

3. The heat-insulating coil bobbin for a nuclear magnetic resonance imaging apparatus according to claim 1, wherein: A heat insulation layer is provided on the inner side wall of the vacuum chamber.

4. The heat-insulating coil bobbin for a nuclear magnetic resonance imaging apparatus according to claim 2, wherein: A flexible heat-insulating pad is provided on the top of the boss.

5. The heat-insulating coil bobbin for a nuclear magnetic resonance imaging apparatus according to claim 1, wherein: The supporting lining comprises at least two layers, and each layer comprises at least one spiral supporting strip; The spiral directions of two adjacent layers of spiral support bars are opposite.

6. The heat-insulating coil bobbin for a nuclear magnetic resonance imaging apparatus according to claim 1, wherein: The supporting mesh is configured as a closed ring; The annular supporting lining mesh includes at least two arc-shaped lining mesh pieces.

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