Electromagnet assembly and medical equipment

Abstract

The utility model relates to the technical field of medical equipment, in particular to an electromagnet assembly and medical equipment, the electromagnet assembly comprises a magnetic core body, a fixing plate and a first cooling pipeline; the fixing plate is attached and fixed to the side face of the magnetic core body; the first cooling pipeline is fixed on the magnetic core body through the fixing plate and is in contact with the magnetic core body; the electromagnet assembly provided by the utility model can realize self-cooling, and is good in cooling effect and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to an electromagnet assembly and a medical device. Background Technology

[0002] Proton therapy is an advanced cancer treatment that uses high-energy proton beams to precisely destroy tumor cells. Compared to traditional X-ray radiotherapy, proton therapy is known for its greater precision and less impact on surrounding healthy tissue. In this process, scanning magnets play a crucial role in controlling the position of the proton beam to ensure that it accurately targets the tumor area.

[0003] However, in practical use, the eddy current effect caused by the frequent changes in the direction of the current inside the scanning magnet leads to a rapid rise in its temperature. This temperature increase has a certain impact on the performance of the scanning magnet, resulting in serious consequences such as decreased magnetic field strength and uniformity, thermal stress and mechanical deformation, aging of insulation materials, and shortened equipment lifespan. Therefore, how to effectively cool down the scanning magnet is a technical problem that needs to be solved in this case. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide an electromagnet component and medical device that can self-cool and has a good cooling effect.

[0005] To achieve the above and other related objectives, this utility model provides an electromagnet assembly, comprising:

[0006] Magnetic core body;

[0007] A fixing plate is provided and fixed to the side of the magnetic core body;

[0008] The first cooling pipe is fixed to the magnetic core body by the fixing plate and is in contact with the magnetic core body.

[0009] As an optional embodiment of this utility model, at least a portion of the first cooling pipe is in surface contact with the magnetic core body and / or the fixing plate.

[0010] As an optional embodiment of this utility model, the magnetic core body includes a magnetic pole end face, and the first cooling pipe is in contact with the magnetic pole end face of the magnetic core body.

[0011] As an optional embodiment of this utility model, both the fixing plate and the first cooling pipe are made of non-magnetic metal material.

[0012] As an optional embodiment of this utility model, at least a portion of the cross-section of the first cooling pipe has a square shape on its outer circumferential surface.

[0013] As an optional embodiment of this utility model, the fixing plate is provided with a mounting groove that matches the first cooling pipe, and the fixing plate fixes the first cooling pipe through the mounting groove.

[0014] As an optional embodiment of this utility model, the magnetic end face of the magnetic core body includes an inner ring and an outer ring, and the first cooling pipe is provided at least along the contour edge of the inner ring and / or the outer ring of the magnetic end face.

[0015] As an optional embodiment of this utility model, the fixing plate at least covers the magnetic end face of the magnetic core body.

[0016] As an optional embodiment of the present invention, the electromagnet assembly further includes a coil and a second cooling pipe for cooling the coil, wherein the first cooling pipe is connected to the second cooling pipe.

[0017] To achieve the above and other related objectives, this utility model provides a medical device, including the aforementioned electromagnet assembly.

[0018] In summary, this invention uses a fixing plate to fix the first cooling pipe to the magnetic core body. On the one hand, the first cooling pipe directly contacts the magnetic core body for heat conduction. On the other hand, since the contact area between the first cooling pipe and the magnetic core body is limited, the fixing plate, as a metal heat transfer material, makes full contact with the magnetic core body, further expanding the heat conduction path and area, which helps heat to be conducted from the magnetic core body to the first cooling pipe, improving the heat dissipation efficiency of the magnetic core body. The fixing plate and the first cooling pipe are made of non-magnetic materials, which will not cause changes to the magnetic field lines, avoid interference with the magnetic field, and ensure the normal operation of the electromagnet assembly. In addition, the electromagnet assembly also has the advantages of simple structure, easy maintenance, and wide application scenarios. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial structural diagram of the magnetic core body before the improvement of this utility model;

[0021] Figure 2 This is a front view of an electromagnet assembly in an optional embodiment of the present invention;

[0022] Figure 3This is a three-dimensional structural diagram of the electromagnet assembly in an optional embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the fixing plate structure in an optional embodiment of the present utility model;

[0024] Figure 5 This is a side view of the electromagnet assembly in an optional embodiment of the present invention.

[0025] Component labeling description: Magnetic core body 1, magnetic extreme end face 11, inner ring 111, outer ring 112, fixing plate 2, mounting groove 21, contour hole 22, fastener 23, first cooling pipe 3, pipe connector 31, main pipe 4, connecting plate 5. Detailed Implementation

[0026] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0027] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0028] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0029] Proton therapy is an advanced form of radiotherapy that uses proton beams to destroy cancer cells. Compared to traditional X-ray radiotherapy, proton therapy offers advantages such as high precision and minimal damage to surrounding healthy tissue. In this process, a scanning magnet plays a crucial role, primarily used to precisely control the proton beam's positioning to target the tumor area. Its main functions include:

[0030] First, control the position of the proton beam: the scanning magnet can deflect the proton beam by generating a controllable magnetic field, so that it scans the target area along a set path; by adjusting the magnetic field strength, the offset of the proton beam in the horizontal (X direction) and vertical (Y direction) directions can be precisely controlled.

[0031] Second, it achieves three-dimensional dose distribution: by changing the path of the proton beam, the scanning magnet can cover the entire treatment area point by point, thereby achieving three-dimensional dose distribution; this method can cover the tumor volume more evenly, while reducing dose exposure to surrounding healthy tissues.

[0032] Third, dynamic adjustment of treatment: During proton therapy, the scanning magnet can dynamically adjust the position of the proton beam according to the real-time treatment plan or the patient's breathing and other movements, to ensure the accuracy and effectiveness of the treatment.

[0033] However, during operation, the eddy current effect caused by frequent changes in current direction in the scanning magnet leads to a rapid temperature rise. Without cooling measures, the magnetic pole temperature of the scanning magnet can reach as high as 170°C under the influence of alternating current. This temperature increase not only reduces the working performance of the scanning magnet (e.g., weakening the magnetic field strength and disrupting its uniformity) but may also cause a series of problems, including but not limited to increased thermal stress, mechanical deformation, accelerated aging of insulating materials, and a shortened lifespan of the entire device. Figure 1 As shown, the conventional solution is to slot the magnetic poles of the scanning magnet and use natural air cooling for cooling. However, this method can only remove a limited amount of heat and cannot achieve an effective cooling effect. Furthermore, the process of manufacturing the magnetic poles of the scanning magnet is complicated and has a certain impact on the magnetic field.

[0034] To address the negative impact of heat generation from the scanning magnet poles, this invention proposes an electromagnet assembly solution. In this solution, coolant circulates through a water-cooling device closely connected to the main heat-generating areas of the magnetic poles, effectively removing heat generated by the eddy current effect and solving the overheating problem of traditional electromagnets during prolonged operation. This ensures stable operation of the electromagnet during beam deflection. Compared to traditional pole slotting air cooling, this invention utilizes the inherent water-cooling advantage of the electromagnet assembly, resulting in a more compact overall electromagnet size. Specifically, this invention winds a first cooling pipe 3 around the stacked laminations of the scanning magnet at least once, allowing it to pass through the heat-generating areas of the magnetic poles and remove heat. The first cooling pipe 3 is made of copper with a square outer edge and a round inner edge, while the fixing plate 2 is made of stainless steel; neither material affects the magnetic field, ensuring the quality of the internal magnetic field of the scanning magnet. This invention employs active water cooling, winding the first cooling pipe 3 around the magnetic poles twice, using water to remove heat from the poles, achieving heat dissipation. The first cooling pipe 3 is directly connected to the second cooling pipe of the coil and then fixed using the fixing plate 2. During treatment, scanning magnets are used to deflect the beam in real time to ensure that the beam accurately hits the tumor target area. The accuracy of the beam determines the treatment effect. This invention effectively solves the overheating problem of traditional magnets during long-term operation and uses materials that do not affect the magnetic field to support the first cooling pipe 3 and the fixing plate 2, ensuring that the magnet maintains a stable operating state during beam deflection. This improves the beam deflection accuracy during radiotherapy, thereby enhancing the treatment effect on the tumor target area and meeting the high precision and high safety requirements of radiotherapy.

[0035] Please see Figure 2-3 This utility model provides an electromagnet assembly, including a magnetic core body 1, a fixing plate 2, and a first cooling pipe 3;

[0036] The fixing plate 2 is attached to and fixed to the side of the magnetic core body 1; the first cooling pipe 3 is fixed to the magnetic core body 1 through the fixing plate 2 and is in contact with the magnetic core body 1.

[0037] It should be noted that in the electromagnet assembly, the magnetic core 1 is the core component that generates the magnetic field, and its heat dissipation performance directly affects the operating efficiency and service life of the entire device. In traditional electromagnet designs, the magnetic core 1 often generates a large amount of heat due to prolonged energization. If this heat cannot be dissipated effectively in time, it will cause the temperature of the magnetic core 1 to rise, leading to increased resistance, reduced power, and ultimately affecting the magnetic force output of the electromagnet. To solve this problem, this electromagnet assembly uses a fixing plate 2 to ensure that at least a portion of the magnetic core 1 is effectively isolated from the outside environment, avoiding or reducing collision damage to the magnetic core 1, and reducing electromagnetic interference to other equipment caused by the direct propagation of the magnetic field of the magnetic core 1. In this case, the first cooling pipe 3 is in direct contact with the magnetic core 1, achieving better heat conduction. The first cooling pipe 3 typically circulates a coolant, such as cooling water, liquid nitrogen, or oil, which can quickly absorb and remove the heat generated by the magnetic core 1, thereby reducing the operating temperature of the magnetic core 1 and ensuring its operation under optimal conditions. In this case, the use of non-magnetic materials avoids magnetic field interference, ensuring the normal operation of the electromagnet. Secondly, the arrangement of the first cooling pipe 3 allows heat to be quickly conducted to the cooling medium, and the heat is carried away by the flow of the cooling medium, effectively preventing overheating of the magnetic core body 1. In addition, since the contact area between the first cooling pipe 3 and the magnetic core body 1 is limited, the fixing plate 2, as a metal heat transfer material, makes full contact with the magnetic core body 1, further expanding the heat conduction path and area, which helps to more efficiently conduct heat from the magnetic core body 1 to the first cooling pipe 3, and then be carried away by the cooling medium, improving the heat dissipation efficiency of the magnetic core body 1. At the same time, since the first cooling pipe 3 has a large contact area with the magnetic core body 1 through the fixing plate 2, the heat dissipation uniformity of the magnetic core body 1 can be improved. Furthermore, the electromagnet assembly in this case also has the advantages of simple structure and easy maintenance, and is suitable for various electromagnet application scenarios that require efficient heat dissipation.

[0038] Please see Figure 2-3 As an optional embodiment of this case, at least a portion of the first cooling pipe 3 is in surface contact with the magnetic core body 1 and / or the fixing plate 2.

[0039] It should be noted that by using surface contact, on the one hand, the contact area can be increased, thereby improving contact stability. On the other hand, increasing the contact area can improve the heat conduction efficiency between the first cooling pipe 3, the magnetic core body 1, and the fixing plate 2, thereby enabling the temperature of the electromagnet assembly to be effectively controlled, avoiding performance degradation or damage caused by overheating, helping to extend the service life of the electromagnet, and reducing maintenance and replacement costs.

[0040] Please see Figure 2-3As an optional embodiment of this case, the magnetic core body 1 includes a magnetic end face 11, and the first cooling pipe 3 is in contact with the magnetic end face 11.

[0041] It should be noted that after the magnetic core body 1 is used as a scanning magnet, due to the back-and-forth change of the current direction, eddy currents are generated in the magnetic core body 1 during operation. Eddy currents are closed current loops generated inside the conductor in a changing magnetic field. These current loops cause additional energy loss and are released in the form of heat. Since the magnetic end face 11 is the area where the magnetic field change is most concentrated, the eddy current effect is particularly significant here, thus generating more heat. Therefore, the magnetic pole of the magnetic core body 1 is the key area for the magnetic core body 1 to heat up. Therefore, this invention focuses on cooling the key heat-generating area of ​​the magnetic core body 1 by making the first cooling pipe 3 in close contact with the magnetic end face 11, which is beneficial to improving the cooling efficiency.

[0042] As an optional embodiment of this case, both the fixing plate 2 and the first cooling pipe 3 are made of non-magnetic metal material.

[0043] It should be noted that non-magnetic materials refer to materials that are not magnetic in themselves and will not undergo significant magnetization under the influence of an external magnetic field. Non-magnetic metallic materials mainly include materials such as copper and aluminum, or some non-magnetic alloy materials, such as aluminum alloys and stainless steel. It should be understood that non-magnetic metallic materials should meet the requirements of the application scenario. For example, non-magnetic metallic materials should be harmless materials, such as not being radioactive materials, and their melting point must meet the requirements of the application scenario in this case.

[0044] As an optional embodiment of this case, the magnetic core body 1 includes magnetic core laminations.

[0045] It should be noted that the magnetic core body 1 of the electromagnet assembly adopts a laminated form rather than a metal block form. This is because when a conductor is in a changing magnetic field, according to the law of electromagnetic induction, an induced current will be generated in the conductor. These currents form a closed loop called eddy current. Eddy currents will cause additional energy loss and be released in the form of heat. By dividing the magnetic core body 1 into multiple pieces and isolating them with non-magnetic materials, the laminated structure can effectively reduce magnetic eddy current losses. The laminated structure of the magnetic core body 1 makes it easier for heat to dissipate, which can prevent or reduce performance degradation or damage caused by overheating.

[0046] As an optional embodiment of this case, at least a portion of the cross-section of the first cooling pipe 3 has a square shape on its outer circumferential surface.

[0047] It should be noted that the outer circumferential surface of the radial cross-section of the first cooling pipe 3, either entirely or in part, is square, which can be rectangular or square. The shape of the inner circumferential surface of the first cooling pipe 3 can be set according to actual needs, and can be circular or square. By making the outer circumferential surface of at least a portion of the cross-section of the first cooling pipe 3 square, a square cross-section provides a larger surface area for the same cross-sectional area compared to a circular cross-section. This results in a larger contact area between the first cooling pipe 3 and the magnetic core body 1, allowing for more efficient heat conduction from the magnetic core body 1 to the first cooling pipe 3. Similarly, the square cross-section also increases the surface area in contact with the fixing plate 2, contributing to a more uniform pressure distribution, reducing hot spots, and improving heat conduction efficiency.

[0048] Please see Figure 2-3 As an optional embodiment of this case, the magnetic end face 11 of the magnetic core body 1 includes an inner ring 111 and an outer ring 112, and the first cooling pipe 3 is provided at least along the contour edge of the inner ring 111 and / or the outer ring 112 of the magnetic end face 11.

[0049] It should be noted that the edge region of the magnetic pole end face 11 often bears greater magnetic field changes and current density, which leads to relatively high eddy current losses and hysteresis losses in the edge region. These losses are released in the form of heat. The heat generated at the edge of the inner ring 111 and / or outer ring 112 of the magnetic pole end face 11 is greater than that in the non-edge region. Therefore, since the first cooling pipe 3 is in direct contact with the high-heat area of ​​the magnetic pole end face 11, namely the edges of the inner ring 111 and the outer ring 112, it can remove heat more quickly, avoid overheating of the magnetic pole, and ensure that the electromagnet can maintain stable performance during long-term operation.

[0050] Please see Figure 3-4 As an optional embodiment of this case, the fixing plate 2 is provided with a mounting groove 21 that matches the first cooling pipe 3, and the fixing plate 2 fixes the first cooling pipe 3 through the mounting groove 21.

[0051] It should be noted that by setting the mounting groove 21 on the fixing plate 2, the mounting groove 21 serves to fix the first cooling pipe 3, preventing it from shifting or loosening during operation. The design of the mounting groove 21 also facilitates the maintenance and replacement of the first cooling pipe 3. It should be understood that the setting of the mounting groove 21 usually takes into account the size and shape of the first cooling pipe 3 to achieve a tight fit and reduce unnecessary gaps and thermal resistance.

[0052] Please see Figure 3-4As an optional embodiment of this case, the fixing plate 2 at least covers the magnetic end face 11 of the magnetic core body 1, and the fixing plate 2 is provided with a contour hole 22 that matches the magnetic core body 1.

[0053] It should be noted that by covering the magnetic end face 11 with the fixing plate 2, the contact area between the fixing plate 2 and the key area where heat accumulates between the magnetic core body 1 is significantly increased, which helps to conduct heat from the magnetic core body 1 to the fixing plate 2 more effectively and improves heat dissipation efficiency; the design of the contour hole 22 can save the amount of material used in the fixing plate 2, thereby reducing the overall weight and manufacturing cost of the electromagnet assembly.

[0054] Please see Figure 5 As an optional embodiment of this case, the electromagnet assembly further includes a coil and a second cooling pipe for cooling the coil, wherein the first cooling pipe 3 is connected to the second cooling pipe.

[0055] It should be noted that the coil is one of the core components of an electromagnet. It generates a magnetic field through current, thereby enabling the electromagnet to attract or retain energy. The coil generates a lot of heat during operation, which needs to be dissipated in a timely manner, otherwise it will affect the performance and lifespan of the electromagnet. Therefore, a second cooling pipe is specifically used to cool the coil. By guiding coolant (such as water, oil or other cooling media) through the coil, the heat generated by the coil is carried away. The first cooling pipe 3 not only cools the magnetic core body 1, but also connects with the second cooling pipe to form an integrated cooling system. This can more effectively reduce the operating temperature of the electromagnet, improve its performance and stability, and make the overall cooling system compact in design, occupy little space, and facilitate integration for application.

[0056] Please see Figure 3 As an optional embodiment of this case, the magnetic end face 11 is the larger face among all the sides of the magnetic core body 1, thereby improving cooling efficiency.

[0057] Please see Figure 3 As an optional embodiment of this case, each of the first cooling pipes 3 is detachably connected by a pipe joint 31, which improves the ease of installation.

[0058] Please see Figure 5 As an optional embodiment of this case, it also includes a main pipeline 4, through which the first cooling pipeline 3 or the second cooling pipeline is connected to the drive pump.

[0059] Please see Figure 3 As an optional embodiment of this case, the fixing plate 2 and the magnetic core body 1 are connected by fasteners 23 such as screws.

[0060] Please see Figure 3As an optional embodiment of this case, the magnetic end facets 11 on both sides of the magnetic core body 1 are provided with a fixing plate 2 and a first cooling pipe 3. The two fixing plates 2 are connected by a connecting plate 5, which is a non-magnetic metal material.

[0061] Please see Figure 3 As an optional embodiment of this case, the fixing plate 2 includes an inner ring structure and an outer ring structure. The inner ring structure and the outer ring structure are separated by a gap through the mounting groove 21, and the inner ring structure and the outer ring structure are connected as one unit at the first side 24 of the fixing plate 2, so that the inner ring structure and the outer ring structure form a fixing plate 2 with an integral structure.

[0062] This utility model also provides a medical device including the aforementioned electromagnet assembly, thereby making the medical device incorporating the electromagnet assembly of this invention fall within the protection scope of this invention. It should be understood that the electromagnet assembly involved in this invention can be applied not only to the field of medical devices but also to other technical fields.

[0063] In summary, this utility model effectively overcomes some practical problems in the prior art, thus having high utilization value and significance.

[0064] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An electromagnet assembly, characterized in that, include: Magnetic core body; A fixing plate is provided and fixed to the side of the magnetic core body; The first cooling pipe is fixed to the magnetic core body by the fixing plate and is in contact with the magnetic core body.

2. The electromagnet assembly according to claim 1, characterized in that, At least a portion of the first cooling pipe is in surface contact with the magnetic core body and / or the fixing plate.

3. The electromagnet assembly according to claim 1, characterized in that, The magnetic core body includes a magnetic end facet, and the first cooling pipe is in contact with the magnetic end facet of the magnetic core body.

4. The electromagnet assembly according to claim 1, characterized in that, Both the fixing plate and the first cooling pipe are made of non-magnetic metal material.

5. The electromagnet assembly according to claim 2, characterized in that, At least a portion of the cross-section of the first cooling pipe has a square outer circumferential surface.

6. The electromagnet assembly according to claim 5, characterized in that, The fixing plate is provided with a mounting groove that matches the first cooling pipe, and the fixing plate fixes the first cooling pipe through the mounting groove.

7. The electromagnet assembly according to claim 1, characterized in that, The magnetic end face of the magnetic core body includes an inner ring and an outer ring, and the first cooling pipe is provided at least along the contour edge of the inner ring and / or the outer ring of the magnetic end face.

8. The electromagnet assembly according to claim 1, characterized in that, The fixing plate at least covers the magnetic end face of the magnetic core body.

9. The electromagnet assembly according to claim 1, characterized in that, The electromagnet assembly also includes a coil and a second cooling pipe for cooling the coil, wherein the first cooling pipe is connected to the second cooling pipe.

10. A medical device, characterized in that, Includes the electromagnet assembly as described in any one of claims 1-9.

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