CN203277001U

CN203277001U - Solenoid coil bobbin and superconducting magnet system

Info

Publication number: CN203277001U
Application number: CN 201320225177
Authority: CN
Inventors: 张强
Original assignee: Shanghai United Imaging Healthcare Co Ltd
Current assignee: Shenzhen United Imaging Healthcare Co Ltd
Priority date: 2013-04-27
Filing date: 2013-04-27
Publication date: 2013-11-06
Anticipated expiration: 2023-04-27

Abstract

The utility model provides a solenoid coil bobbin and a superconducting magnet system. The bobbin is of a cylindrical barrel body structure. A wire fixing groove in the periphery direction is formed in the outer surface of a barrel body which is provided with at least one stress releasing groove at the same time. The stress releasing groove is used for reducing stress of a high-stress zone. Under the situation that the thickness of bobbin materials and the structure size of the bobbin are not increased, stress on the bobbin can be evenly distributed, the phenomena that a coil fixed on the bobbin deviates are greatly reduced, and the evenness of a magnetic field of a superconducting magnet is better.

Description

Solenoid coil reel and superconducting magnet system

Technical field

The utility model relates to the mr techniques field, relates in particular to a kind of support component for the superconducting magnet solenoid coil.

Background technology

Magnet in magnetic resonance imaging (MRI, Magnetic Resonance Imaging) system can be divided into the types such as permanent magnet, resistive magnet and superconducting magnet, and superconducting magnet is good because of the uniformity of magnetic field that produces, the stable high favor that enjoys.Superconducting magnet inside comprises the solenoid coil of several series connection, and each coil is formed by the coiling of hundreds of circle superconducting line, produces high-intensity magnetic field after coil electricity.

In order to satisfy superconducting magnet magnetic field intensity and magnetic field homogeneity requirement, need to there be a support component these solenoid coils accurately to be fixed on the position of design, we are referred to as reel usually this support component.The outer surface of reel is provided with along the circumferential direction solidus groove (as shown in Figure 1, in figure 1 ' be the prior art reel, 2 is solenoid coil), solenoid coil be wound in realize in the solidus groove fixing.In the use procedure of superconducting magnet, due to the reciprocation of coil with the magnetic field that produces, coil can be subject to very large responsive to axial force, and common suffered axial force can reach tens to tons up to a hundred.So big axial force can make reel produce the phenomenon (as shown in Figure 2) of distortion, and coil position is offset, and makes the magnetic field homogeneity variation.In the prior art, for be reel by sufficiently high intensity, be generally by increasing the reel material thickness, strengthen physical dimension and improve its intensity.But the thickness that increases the reel material must cause the whole internal diameter of coil to increase or the magnet aperture reduces.For the design of superconducting magnet, internal coil diameter is larger, and design difficulty is higher, and the superconducting line that needs is also more, and manufacturing cost will increase greatly; And reduce the magnet aperture, and can reduce the comfort level that patient uses, also inadvisable.

Therefore, be necessary to provide a kind of improved superconducting magnet solenoid pipeline circle reel, to overcome the defective that exists in prior art.

The utility model content

The utility model provides a kind of solenoid coil reel, to realize in the situation that do not increase original reel thickness, do not increase physical dimension, the stationary solenoids coil that reel still can be stable under powerful responsive to axial force and do not produce the displacement phenomenon.

For addressing the above problem, a kind of solenoid coil reel that the utility model provides has cylindrical tube, solidus groove is along the circumferential direction arranged on barrel outer surface, it is characterized in that: also be provided with at least one stress relief grooves along the circumferential direction on described reel.

Further, the degree of depth of described stress relief grooves is less than the degree of depth of solidus groove.

Further, the degree of depth of described stress relief grooves is 70%～85% of solidus groove depth.

Further, described stress relief grooves is located at arbitrary region of stress concentration of reel.

Further, described stress relief grooves is arranged between two solidus grooves on reel.

Further, described reel is made by light metal alloy or fibre strengthening thermosetting resin material.

For addressing the above problem, the utility model also provides a kind of superconducting magnet system, comprise low-temperature (low temperature) vessel, be placed in solenoid coil, solenoid coil reel in low-temperature (low temperature) vessel, described solenoid coil reel is provided with solidus groove and stress relief grooves along the circumferential direction, and solenoid coil is arranged in the solidus groove.

Further, described stress relief grooves is between two solidus grooves.

Further, described stress relief grooves is narrow than the solidus groove.

Further, the bottom of described stress relief grooves is arc.

Compared with prior art, the utility model does not increase former reel thickness, does not increase physical dimension, but open stress relief grooves at former reel region of stress concentration, discharge stress, thereby reduced stress excessive in the subregion, make the stress distribution of whole reel more even, avoided part solidus groove stressed excessive and distortion makes the situation of coil displacement.

Description of drawings

Fig. 1 is solenoid coil reel schematic cross-section vertically in prior art;

Fig. 2 is that the axial force that produces after coil electricity is to the effect situation schematic diagram of reel;

Fig. 3 is reel cross sectional representation described in the utility model;

Fig. 4 is reel described in the utility model schematic cross-section vertically;

Fig. 5 is reel force analysis figure described in the utility model;

Fig. 6 is that solidus groove stress is with Stress Release channel depth change curve chart;

Fig. 7 is the utility model magnetic resonance system superconducting magnet structure schematic diagram.

Embodiment

For above-mentioned purpose of the present utility model, feature and advantage can more be become apparent, below in conjunction with drawings and Examples, embodiment of the present utility model is described in detail.Obviously, described embodiment is only the part of embodiment of the present utility model, rather than they are whole.According to these embodiment, those of ordinary skill in the art belongs to protection range of the present utility model need not obtainable all other execution modes under the prerequisite of creative work.

With reference to Fig. 3, Fig. 4 and shown in Figure 5, solenoid coil reel 1 described in the utility model is a cylindrical tube, and solidus groove 11 is along the circumferential direction arranged on its outer surface, also is provided with at least one stress relief grooves 12 on described reel 1.The degree of depth of described stress groove 12 is less than the degree of depth of solidus groove 11.Through a series of finite element results relatively, the optimum depth of described stress groove 12 should be 70%～85% of solidus groove 11 degree of depth.Described stress relief grooves 12 is between two solidus grooves 11.

Need to prove; the cross section of the bottom of stress relief grooves shown in the utility model 12 is arc; the better embodiment that this shape is only selected for the utility model adopts; and be not to limit protection range of the present utility model; the bottom shape of described stress relief grooves 12 can also be square, taper etc., and those skilled in the art can arrange the shape of stress relief grooves 12 as the case may be.

Need to prove, in Figure of description, the position of solidus groove 11 shown in each accompanying drawing and quantity are not to limit the utility model, but for picture structure more is easily understood, only schematically draw position, number, size of indivedual solidus grooves 11 etc., in practical operation, those skilled in the art can change the parameters such as the position, number of solidus groove 11 as required.

Described stress relief grooves 12 can be located at the zone that arbitrary stress is concentrated, and is not limited only to position shown in Figure 4, and the definite of region of stress concentration can draw by finite element analysis.through finite element analysis, one of high stress areas on reel 1 is (more attractive in appearance in order to make picture for regional A, the utility model is attached pictures and is symmetrical structure, but for character express more is easily understood, our left-half of only getting wherein of explanation in an embodiment is that example is described), therefore offer stress relief grooves 12 in regional E rigidity larger place, after the solenoid coil energising, face 111 places are subject to an axial active force part and are dissolved by stress relief grooves 12, only a part is delivered to face 112 places, little when making the distortion at face 112 places more not offer stress relief grooves 12, therefore the stress at regional A place has significantly reduced.

With reference to shown in Figure 6, when described stress relief grooves 12 degree of depth more shallow, during much smaller than the winding slot degree of depth, stress reducing effect to described regional A place is not obvious, and along with the degree of depth of stress relief grooves 12 increases, the zone A stress value reduce gradually, when stress relief grooves 12 degree of depth described solidus groove 11 degree of depth 70%～85% between the time, can reach optimum efficiency.Certainly, described stress relief grooves 12 internal stresss should need be with within the range of stress at material.And when stress relief grooves 12 degree of depth surpassed the degree of depth of solidus groove 11, stress relief grooves 12 places can become the stress maximum region on the contrary, and are therefore inadvisable.Analysis through a series of result of finite element is compared, and is out of shape in acceptable scope at described 111, by adjusting shape and the degree of depth of stress relief grooves 12, more than can making the stress reduction 30MP of regional A.

With reference to shown in Figure 7, for superconducting magnet system of the present utility model, comprise low-temperature (low temperature) vessel, be placed in solenoid coil 2, solenoid coil reel 1 in low-temperature (low temperature) vessel, also comprise shielded coil 3.Described low-temperature (low temperature) vessel mainly comprises superconducting magnet coil tank body 4, middle thermal radiation resistant layer 5, vacuum skin 6; Described reel 1 is provided with solidus groove 11 and stress relief grooves 12 along the circumferential direction, and described solenoid coil 2 is arranged in solidus groove 11, and described stress relief grooves 12 is between two solidus grooves 11, and described stress relief grooves 12 is narrow than solidus groove 11.

Although the utility model is announced as above with preferred embodiment; but it is not to limit the utility model; any those skilled in the art are not within breaking away from spirit and scope of the present utility model; can utilize method and the technology contents of above-mentioned announcement to make possible change and modification to technical solutions of the utility model; therefore; every content that does not break away from technical solutions of the utility model; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection range of technical solutions of the utility model according to technical spirit of the present utility model.

Claims

1. solenoid coil reel, described reel has cylindrical tube, and solidus groove is along the circumferential direction arranged on barrel outer surface, it is characterized in that: also be provided with at least one stress relief grooves along the circumferential direction on described reel.

2. solenoid coil reel according to claim 1, it is characterized in that: the degree of depth of described stress relief grooves is less than the degree of depth of solidus groove.

3. solenoid coil reel according to claim 2, it is characterized in that: the degree of depth of described stress relief grooves is 70%～85% of solidus groove depth.

4. according to claim 1～3 described solenoid coil reels of any one, it is characterized in that: described stress relief grooves is located at arbitrary region of stress concentration of reel.

5. solenoid coil reel according to claim 1 is characterized in that: described stress relief grooves is arranged between two solidus grooves on reel.

6. according to claim 1～3 described solenoid coil reels of any one, it is characterized in that: described reel is made by light metal alloy or fibre strengthening thermosetting resin material.

7. superconducting magnet system, comprise low-temperature (low temperature) vessel, be placed in solenoid coil, solenoid coil reel in low-temperature (low temperature) vessel, it is characterized in that: described solenoid coil reel is provided with solidus groove and stress relief grooves along the circumferential direction, and solenoid coil is arranged in the solidus groove.

8. superconducting magnet system according to claim 7, it is characterized in that: described stress relief grooves is between two solidus grooves.

9. superconducting magnet system according to claim 7, it is characterized in that: described stress relief grooves is narrow than the solidus groove.

10. according to claim 7 or 9 described superconducting magnet systems, it is characterized in that: the bottom of described stress relief grooves is arc.