CN210803695U - Gradient coil assembly of magnetic resonance system and magnetic resonance system - Google Patents

Abstract

The utility model relates to a magnetic resonance equipment technical field especially relates to a gradient coil assembly and magnetic resonance system of magnetic resonance system. The gradient coil assembly of the magnetic resonance system comprises a gradient coil which is formed by winding a coil body. The coil body comprises at least one conductor and a shell wrapped on the outer side of the at least one conductor, the conductor is of a solid structure, the conductor is electrically isolated from the shell along the length extending direction of the conductor, and a cooling channel for circulating a cooling medium is formed between the conductor and the shell. The coil body of the gradient coil is designed into a structure comprising the conductor and the shell, and the cooling channel formed by the wall surface of the conductor is formed on the inner side of the shell, so that the conductor can directly contact with a cooling medium flowing through the cooling channel to exchange heat, the heat dissipation effect of the coil body is better, and the performance of the gradient coil assembly of the magnetic resonance system is improved.

Description

Gradient coil assembly of magnetic resonance system and magnetic resonance system

Technical Field

The utility model relates to a magnetic resonance imaging equipment technical field especially relates to a gradient coil assembly and magnetic resonance system of magnetic resonance system.

Background

When the magnetic resonance equipment works, the gradient coil can generate a large amount of heat, so that the heat needs to be taken away through a corresponding cooling mechanism, and the normal use of the magnetic resonance equipment is ensured. While one conventional cooling means is to cool the gradient coils by means of cooling tubes mounted on the gradient coils. In the cooling mode, materials with small heat conductivity coefficients such as cooling pipes, resin adhesives, epoxy plates and the like are arranged on a heat conduction path, so that the heat dissipation effect is poor, and the cooling effect of the cooling mode on the gradient coil is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a gradient coil assembly of a magnetic resonance system and a magnetic resonance system, which solve the problem of poor cooling effect of the conventional cooling method.

The gradient coil assembly of the magnetic resonance system comprises a gradient coil, wherein the gradient coil is formed by winding a coil body, the coil body comprises at least one conductor and a shell wrapped on the outer side of the at least one conductor, the conductor is of a solid structure, the conductor is electrically isolated from the shell along the length extension direction of the conductor, and a cooling channel for circulating a cooling medium is formed between the conductor and the shell.

In one embodiment, the coil body comprises a plurality of conductors, the outer surface of each conductor is coated with an electric insulation layer, and the plurality of conductors are arranged side by side, and cooling channels for circulating a cooling medium are formed between the adjacent conductors.

In one embodiment, a part of the outer wall of the conductor in the circumferential direction is recessed in a direction away from the housing, and the recessed part of the conductor constitutes a part of the wall surface of the cooling passage.

In one embodiment, the cross section of the conductor is I-shaped, the conductor is provided with two symmetrical notches, and a cooling channel is formed between each notch and the shell; and/or

A cooling channel is formed between the notch of one conductor and the notch of the adjacent conductor; and/or

The recess of one of the conductors forms a cooling channel with the outer wall of the adjacent conductor.

In one embodiment, the gradient coil assembly of the magnetic resonance system further comprises an electro-hydraulic separation joint connected to an end of the coil body, the electro-hydraulic separation joint having an input end and two output ends, the input end being used for connecting with the coil body, one of the output ends being used for leading out the conductor, and the other output end being used for communicating with the cooling channel to lead in or lead out the cooling medium.

In one embodiment, the electro-hydraulic separation joint comprises a first joint part, a second joint part and a third joint part, one end of the first joint part is connected with the shell in a sealing mode, the other end of the first joint part is connected with one end of the second joint part, the other end of the second joint part is connected with the third joint part, a cavity is formed inside the second joint part and is used for being communicated with the cooling channel, a cavity opening is formed in the cavity to lead in or out a cooling medium, and a through hole communicated with the third joint part is formed in the cavity wall on one side of the cavity to lead out a conductor.

In one embodiment, a part of the inner wall of the housing in the circumferential direction is recessed in a direction away from the conductor, and the recessed portion of the housing constitutes a part of the wall surface of the cooling passage.

In one embodiment, the housing is provided with an opening for introducing or discharging a cooling medium.

In one embodiment, the housing includes a housing body and an electrically insulating material coated on a surface of the housing body.

A magnetic resonance system comprising a gradient coil assembly of a magnetic resonance system as claimed in any one of the above aspects.

The beneficial effects of the utility model include at least:

the coil body of the gradient coil is designed into a structure comprising the conductor and the shell, and the cooling channel formed by the wall surface of the conductor is formed on the inner side of the shell, so that the conductor can be in direct contact with a cooling medium flowing through the cooling channel to exchange heat, the heat dissipation effect of the coil body is better, and the performance of the gradient coil assembly of the magnetic resonance system is improved.

Drawings

Fig. 1 is a schematic structural diagram of a gradient coil assembly of a magnetic resonance system according to an embodiment of the present invention;

FIG. 2 is a first cross-sectional view of the coil body in the configuration shown in FIG. 1;

FIG. 3 is a second cross-sectional view of the coil body in the configuration shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view III of the coil body in the configuration shown in FIG. 1;

FIG. 5 is a cross-sectional view four of the coil body in the configuration shown in FIG. 1;

FIG. 6 is a cross-sectional schematic diagram five of the coil body in the configuration shown in FIG. 1;

FIG. 7 is a sixth schematic cross-sectional view of the coil body in the configuration shown in FIG. 1;

FIG. 8 is a seventh cross-sectional view of the coil body in the configuration shown in FIG. 1;

FIG. 9 is a schematic diagram of the electro-hydraulic separation joint in the configuration of FIG. 1;

FIG. 10 is a schematic cross-sectional view of the structure of FIG. 9 in one embodiment;

FIG. 11 is a schematic sectional view A-A of FIG. 10;

fig. 12 is a schematic cross-sectional view of the structure of fig. 9 in another embodiment.

Description of reference numerals:

10-gradient coils;

100-a coil body;

110-a conductor; 111-a notch;

120-a housing;

130-a cooling channel;

200-an electro-hydraulic separation joint;

210-a first joint part;

220-a second joint part;

221-a chamber; 222-chamber opening; 223-through holes;

230-a third joint portion; 231-a sealing material;

240-anchor ear;

250-solder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the gradient coil assembly and the magnetic resonance system of the present invention are further described in detail by embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 4, a gradient coil assembly of a magnetic resonance system according to an embodiment of the present invention includes a gradient coil 10, and the gradient coil 10 is formed by winding a coil body 100. The coil body 100 includes at least one conductor 110 and a case 120 wrapped outside the at least one conductor 110. The conductor 110 is a solid structure, along the length extending direction of the conductor 110, the conductor 110 is electrically isolated from the housing 120, and a cooling channel 130 is formed between the conductor 110 and the housing 120. The cooling passage 130 is used to circulate a cooling medium. It is understood that the cooling medium may be cool air. The cooling medium may also be deionized water. Or the cooling medium may be insulating oil or other cooling medium. The conductor 110 may be made of a conductive metal such as copper or aluminum. In one embodiment, the gradient coil assembly of the magnetic resonance system further comprises an electrically insulating layer coated on the outer surface of the conductor 110. By applying an electrically insulating layer, it is further ensured that the conductor 110 does not leak current.

The housing 120 may be made of non-conductive flexible plastic, silica gel, nylon, PVC, or other non-metallic materials. Alternatively, the housing 120 may be made of a metal material integrally wrapped with an insulating varnish. The metal material may be copper, aluminum or their alloys. In one embodiment, the housing 120 includes a housing body and an electrically insulating material coated on a surface of the housing body. The case body may be made of a metal material, and a surface of the case body is coated with an electrically insulating material. The housing 120 is made of a metal housing body coated with an electrically insulating material, and has a large thermal conductivity and a high heat dissipation capability.

Referring to fig. 4, in one embodiment, the coil body 100 includes a plurality of conductors 110, and an outer surface of each conductor 110 is coated with an electrical insulation layer. The plurality of conductors 110 are arranged side by side and a cooling passage 130 for circulating a cooling medium is formed between adjacent conductors 110. In this embodiment, the number of the conductors 110 wrapped inside the housing 120 is plural, and the cooling passages 130 for circulating the cooling medium are formed among the plural conductors 110.

In the gradient coil assembly of the magnetic resonance system of the present embodiment, the coil body 100 of the gradient coil 10 is designed to include the conductors 110 and the housing 120, and the cooling passages 130 for flowing the cooling medium can be formed between the conductors 110 and the housing 120 or between the adjacent conductors 110. In this way, the cooling channel 130 partially formed by the wall surface of the conductor 110 is formed inside the housing 120, so that the conductor 110 can directly contact with the cooling medium flowing through the cooling channel 130 to exchange heat, and the heat dissipation effect of the coil body 100 is good, thereby improving the performance of the gradient coil assembly of the magnetic resonance system.

The cooling channel 130 may be formed in various ways. Fig. 2 to 8 respectively show schematic diagrams of cross sections of the coil body 100 in different embodiments. Referring to fig. 2 to 8, in one embodiment, a part of the outer wall of the conductor 110 in the circumferential direction is recessed in a direction away from the housing 120, and the recessed part of the conductor 110 constitutes a part of the wall surface of the cooling passage 130. In this embodiment, the housing 120 may have a conventional cylindrical or square-cylindrical cross-sectional shape, and a recess is formed in a wall surface of the conductor 110 opposite to the housing 120, and a cooling passage 130 for flowing a cooling medium is formed between the recess of one of the conductors 110 and the other conductor 110 when the number of the conductors 110 wrapped in the housing 120 is two or more.

Illustratively, as shown in fig. 2, the cross-section of the conductor 110 has an i-shape, and the conductor 110 has two notches 111 that are symmetrical. The recess 111 of the conductor 110 and the housing 120 form a cooling channel 130 therebetween. As shown in fig. 2 and 3, the coil body 100 includes a conductor 110 and a case 120, and the number of the conductors 110 wrapped in the case 120 may be one. As shown in fig. 3, the gradient coil 10 may be formed by winding a plurality of coil bodies 100 arranged in parallel. Referring to fig. 2 and 3, the recess 111 of the conductor 110 constitutes a part of a wall surface of the cooling passage 130, and a wall surface of the housing 120 opposite to the recess 111 constitutes the remaining wall surface of the cooling passage 130.

As shown in fig. 4 to 6, the number of the conductors 110 wrapped in the housing 120 may be two, three, or more. Referring to fig. 4, a cooling channel 130 is formed between the notch 111 of one of the conductors 110 and the notch 111 of an adjacent conductor 110. In this embodiment, the recesses 111 of two adjacent conductors 110 form part of the wall surface of the cooling channel 130, and the recesses 111 of the other conductor 110 form the remaining wall surface of the cooling channel 130. Meanwhile, a cooling channel 130 is also formed between the conductor 110 and the housing 120. Referring to fig. 5, the plurality of conductors 110 are arranged side by side, the notches 111 of the conductors 110 constitute part of the wall surfaces of the cooling passage 130, and the wall surface of the housing 120 opposite to the notches 111 constitutes the remaining wall surface of the cooling passage 130. Referring to fig. 6, the recess 111 of one of the conductors 110 forms a cooling channel 130 with the outer wall of the adjacent conductor 110. In this embodiment, the recesses 111 of two adjacent conductors 110 form part of the wall surface of the cooling passage 130, and the outer wall of the recess 111 of the other conductor 110 (specifically, the wall on the side of the recess 111) forms the remaining wall surface of the cooling passage 130. Meanwhile, the cooling passage 130 is also formed between the conductor 110 and the housing 120, and between the outer walls of the plurality of conductors 110.

In other embodiments, as shown in fig. 7, the cross-section of the conductor 110 may be a star shape, and a space between two adjacent corners and the housing 120 form a cooling channel 130 for circulating a cooling medium. Alternatively, as shown in fig. 8, the cross section of the conductor 110 is rectangular, and the circumferential side wall of the conductor 110 is provided with a plurality of grooves recessed in a direction away from the housing 120, and a cooling channel 130 may be formed between each groove and the housing 120. And when the number of the conductors 110 wrapped in the housing 120 is two or more, the grooves of two adjacent conductors 110 are opposed to form the cooling passage 130.

As another practicable manner, a part of the inner wall of the housing 120 in the circumferential direction is recessed in a direction away from the conductor 110, and the recessed part of the housing 120 constitutes a part of the wall surface of the cooling passage 130. In this embodiment, the conductor 110 may have a conventional circular or square cross-sectional shape, and a recess, such as a slot, is formed on a wall surface of the housing 120 opposite to the conductor 110. Thereby forming a cooling channel 130 for circulating a cooling medium between the groove of the housing 120 and the conductor 110. In other embodiments, recesses may be formed on both the conductor 110 and the housing 120, such that the cooling channel 130 is formed between the recessed portion of the conductor 110 and the recessed portion of the housing 120.

Referring to fig. 1, as one practical way, the gradient coil assembly of the magnetic resonance system further includes an electro-hydraulic separation joint 200 connected to an end of the coil body 100. The electro-hydraulic separator 200 has an input terminal for connecting with the coil body 100, and two output terminals, one of which is used to lead out the conductor 110, and the other of which is used to communicate with the cooling channel 130 to lead in or lead out the cooling medium. The electro-hydraulic separation joint 200 facilitates connection of the gradient coil assembly of the magnetic resonance system to external circuitry and refrigeration circuits.

Referring to fig. 9-12, in one embodiment, the electro-hydraulic separation joint 200 includes a first joint portion 210, a second joint portion 220, and a third joint portion 230. One end of the first joint part 210 is hermetically connected to the housing 120, the other end of the first joint part 210 is connected to one end of the second joint part 220, and the other end of the second joint part 220 is connected to the third joint part 230. The second joint part 220 is formed with a chamber 221 inside, the chamber 221 is for communicating with the cooling passage 130, and the chamber 221 is provided with a chamber opening 222 to introduce or draw out a cooling medium. A wall of one side of the chamber 221 is provided with a through hole 223 communicated to the third joint portion 230 to draw out the conductor 110. In this embodiment, the first joint part 210 forms an input end of the electro-hydraulic separation joint 200. The second connector part 220 forms one of the outputs of the electro-hydraulic separation connector 200. The third connector part 230 forms the other output of the electro-hydraulic separation connector 200. The coil body 100 and the second joint part 220 are fixedly connected by the first joint part 210, and the coil body 110 and the first joint part 210 are sealed, so that the cooling medium in the cooling passage 130 can be introduced or discharged through the chamber opening 221 of the second joint part 220. While the conductor 110 of the coil body 100 may be drawn out to the third tab 230 through the through hole 223 so as to be connected to an external circuit. It is understood that sealing is also required between the third tab 230 of the lead conductor 110 and the conductor 110.

It should be noted that the number of the through holes 223 opened on the wall of one side of the chamber 221 may be one, the conductors 110 wrapped inside the housing 120 are all led out through the one through hole 223, and a seal is required to be formed between the conductors 110 and the third connector portion 230. Alternatively, the number of the through holes 223 may be the same as the number of the conductors 110 wrapped in the housing 120, and a seal is required to be formed between the conductors 110 and the third terminal portion 230.

Referring to fig. 10 and fig. 11, a longitudinal sectional view and a cross-sectional view of an electro-hydraulic separation joint in one embodiment are shown. This embodiment is applicable to the case that each part of the electro-hydraulic separation joint 200 is made of a non-metal material. In this embodiment, the number of conductors 110 wrapped in the housing 120 is exemplarily 5. Referring to fig. 10, the first joint portion 210 is hermetically connected to the housing 120, and after the coil body 100 passes through the first joint portion 210, the hoop 240 is used to fasten the first joint portion 210 and the coil body 100, so as to achieve the hermetic connection between the first joint portion 210 and the housing 120 and prevent the cooling medium from leaking at the first joint portion 210. Meanwhile, at the third joint part 230, when the conductor 110 is inserted into the third joint part 230 through the through hole 223, a sealing material 231 is filled between the third joint part 230 and the conductor 110, and the third joint part 230 and the conductor 110 are tightened by using the anchor ear 240 to prevent the cooling medium from leaking at the third joint part 230.

Referring to FIG. 12, a cross-sectional view of a longitudinal section at an electro-hydraulic separation joint in another embodiment is shown. This embodiment is applicable to the case where each component of the electro-hydraulic separation joint 200 is made of a metal material. In this embodiment, the first joint part 210 and the housing 120 are hermetically connected, and the sealing connection may be achieved by forming a weld between the end of the first joint part 210 and the housing 120 of the coil body 100 after the coil body 100 passes through the first joint part 210, and filling the solder 250 to weld the first joint part 210 and the housing 120 to be dead, thereby preventing the cooling medium from leaking at the first joint part 210. Meanwhile, at the third joint part 230, when the conductor 110 is inserted into the third joint part 230 through the through hole 223, a weld is formed between the third joint part 230 and the conductor 110 and the solder 250 is filled to weld the third joint part 230 and the conductor 110 to be sealed, preventing the cooling medium from leaking at the third joint part 230.

In another embodiment, the housing 120 is provided with openings for introducing or discharging a cooling medium. In this embodiment, an opening may be formed in the housing 120 as needed to introduce or remove the cooling medium, so as to facilitate the circulation of the cooling medium.

An embodiment of the present invention further provides a magnetic resonance system, including the gradient coil assembly of the magnetic resonance system according to any one of the above aspects. Because the gradient coil component of the magnetic resonance system has the advantages of good heat dissipation effect and better performance, the magnetic resonance system comprising the gradient coil component of the magnetic resonance system also has the advantages of at least fast heat dissipation, more stable performance and better imaging effect.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. The gradient coil assembly of the magnetic resonance system is characterized by comprising a gradient coil (10), wherein the gradient coil (10) is formed by winding a coil body (100), the coil body (100) comprises at least one conductor (110) and a shell (120) wrapped on the outer side of the at least one conductor (110), the conductor (110) is of a solid structure and is in electrical isolation with the shell (120) along the length extension direction of the conductor (110), and a cooling channel (130) for circulating a cooling medium is formed between the conductor (110) and the shell (120).

2. A gradient coil assembly of a magnetic resonance system according to claim 1, wherein the coil body (100) comprises a plurality of the conductors (110), an outer surface of each of the conductors (110) is coated with an electrically insulating layer, the plurality of conductors (110) are arranged side by side and the cooling channels (130) for circulating a cooling medium are formed between adjacent conductors (110).

3. Gradient coil assembly of a magnetic resonance system according to claim 1 or 2, characterized in that a part of the outer wall of the conductor (110) in the circumferential direction is recessed in a direction away from the housing (120), the recessed part of the conductor (110) constituting a part of the wall surface of the cooling channel (130).

4. A gradient coil assembly of a magnetic resonance system according to claim 3, characterized in that the conductor (110) has an i-shaped cross-section, the conductor (110) having two symmetric notches (111), the notches (111) and the housing (120) forming the cooling channel (130) therebetween; and/or

Wherein the cooling channel (130) is formed between the notch (111) of one of the conductors (110) and the notch (111) of the adjacent conductor (110); and/or

The cooling channel (130) is formed between the notch (111) of one of the conductors (110) and the outer wall of the adjacent conductor (110).

5. Gradient coil assembly of a magnetic resonance system according to claim 1 or 2, further comprising an electro-hydraulic separation joint (200) connected to an end of the coil body (100), the electro-hydraulic separation joint (200) having one input for connection with the coil body (100) and two outputs, one of the outputs for leading out the conductor (110) and the other output for communicating with the cooling channel (130) for leading in or leading out a cooling medium.

6. The gradient coil assembly of the magnetic resonance system according to claim 5, wherein the electro-hydraulic separation joint (200) includes a first joint part (210), a second joint part (220), and a third joint part (230), one end of the first joint part (210) is hermetically connected to the housing (120), the other end of the first joint part (210) is connected to one end of the second joint part (220), the other end of the second joint part (220) is connected to the third joint part (230), a chamber (221) is formed inside the second joint part (220), the chamber (221) is used for communicating with the cooling channel (130), the chamber (221) is provided with a chamber opening (222) for introducing or extracting a cooling medium, a through hole (223) communicating with the third joint part (230) is formed on one side of the chamber (221), to lead out the conductor (110).

7. Gradient coil assembly of a magnetic resonance system according to claim 1 or 2, characterized in that a part of the inner wall of the housing (120) in the circumferential direction is recessed in a direction away from the conductor (110), the recessed part of the housing (120) constituting a part of the wall surface of the cooling channel (130).

8. Gradient coil assembly of a magnetic resonance system according to claim 1, characterized in that the housing (120) is provided with openings for introducing or discharging a cooling medium.

9. Gradient coil assembly of a magnetic resonance system according to claim 1, characterized in that the housing (120) comprises a housing body and an electrically insulating material, which is coated on a surface of the housing body.

10. A magnetic resonance system comprising a gradient coil assembly of a magnetic resonance system as claimed in any one of claims 1 to 9.

Images