Nuclear magnetic resonance magnetic shielding room structure
By using galvanized steel plates and silicon steel plates to assemble the MRI magnetic shielding room, the high cost and welding problems of copper plates were solved, fast and high-quality shielding room construction was achieved, and the stability and imaging quality of MRI imaging were improved.
Patent Information
- Application Number
- CN202422744243.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Traditional MRI magnetic shielding rooms use copper plates, which are costly and difficult to control welding quality, resulting in long construction cycles and quality defects, affecting imaging quality.
Galvanized steel plates are used instead of copper plates, and the shielding room shell is assembled by folding and bolting. Silicon steel plates and waterproof insulation layers are laid on the bottom to enhance the magnetic induction strength and insulation effect and avoid electromagnetic interference.
It reduces the cost of shielding rooms, improves construction speed and quality, enhances the stability and imaging quality of MRI, and avoids the influence of static electricity and thunderstorm weather.
Smart Images
Figure CN223459056U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the construction field of building, concretely relates to a nuclear magnetic resonance magnetic shielding room structure. BACKGROUND
[0002] Nuclear magnetic resonance imaging (MRI) is a kind of medical imaging technology used by hospital radiology department, and the nuclear magnetic resonance instrument is extremely harsh to the surrounding environment when using, because the electromagnetic interference around can influence the stability of nuclear magnetic resonance imaging, thereby leading to poor imaging quality, to solve this problem, a magnetic shielding room is usually set up to place the nuclear magnetic resonance instrument.The shell of the traditional magnetic shielding room usually adopts full-welding splicing of red copper plate, and the high cost of the shielding room is caused by the high price of the red copper plate, and because the red copper plate is thin, the welding quality is difficult to control when full-welding, and quality defects such as base metal burning, pit, collapse and not filling are easily caused, and furthermore, the full-welding construction speed is slow, and the construction period is long. UTILITY MODEL CONTENTS
[0003] The utility model discloses a nuclear magnetic resonance magnetic shielding room structure, the shell of shielding room adopts galvanized steel sheet to replace red copper plate, can save 1 / 2's cost, and galvanized steel sheet is hard, can control its deformation more effectively, galvanized steel sheet is connected between adoption bolt, can improve construction speed, improve construction quality.
[0004] In order to realize above-mentioned purpose, the technical scheme that the utility model adopts is:
[0005] A nuclear magnetic resonance magnetic shielding room structure, including the shell of shielding room, the shell of shielding room adopts galvanized steel sheet and assembles, the four around edges of single galvanized steel sheet form the flanging, the hole is opened on the flanging, and the flanging between adjacent galvanized steel sheets is correspondingly attached, and is connected through the bolt and passes through the hole on the flanging;The lower part of the bottom surface of the shell of shielding room is provided with the magnet load-bearing foundation, the bottom of the magnet load-bearing foundation is paved with silicon steel plate, the surrounding of the magnet load-bearing foundation is backfilled with foam concrete until the top surface of the magnet load-bearing foundation is flush, the top surface of the magnet load-bearing foundation and the top surface of the foam concrete are paved with waterproof roll material, the surface of the waterproof roll material around the magnet load-bearing foundation is paved with silicon steel plate, the top surface of the magnet load-bearing foundation and the top surface of the silicon steel plate around are paved with PVC insulation roll material, the top of PVC insulation roll material is provided with the shell of shielding room, and the distance is left between the four around side walls of the shell of shielding room and the main body of building and between the top surface of the shell of shielding room and the main body of building.
[0006] Further, the height of the magnet load-bearing foundation is not less than 300mm.
[0007] Further, the waterproof roll material adopts SBS waterproof roll material, and the waterproof roll material is paved with two layers, and each layer of waterproof roll material is paved with a joint, and the waterproof roll materials of upper and lower layers are staggered and spliced.
[0008] Further, the four peripheral edges of the waterproof roll material are turned up to the wall surface in the building main body.
[0009] Further, the turned-up height of the waterproof roll material is not less than 500 mm.
[0010] Further, the thickness of the silicon steel plate is not less than 0.5 mm, and eight layers of silicon steel plates are laid at the bottom of the magnet load-bearing foundation.
[0011] Further, the thickness of the galvanized steel plate is not less than 1.5 mm, and stiffening ribs are arranged in the middle of the large-size galvanized steel plate.
[0012] Further, the distance between the shielding room shell and the wall surface in the building main body is 80-100 mm, and the distance between the shielding room shell and the roof of the building main body is not less than 1000 mm.
[0013] Further, wood batten is mounted on the inner surface of the side wall of the shielding room shell, the wood batten is fixedly connected with the folded edge or stiffening rib of the galvanized steel plate through an angle joint and a bolt, a rock wool layer is filled between the side wall of the shielding room shell and the wood batten, and a wall surface decoration layer is arranged outside the rock wool layer; an aluminum alloy suspended ceiling batten is mounted at the top of the shielding room shell, the suspended ceiling batten is connected with the top of the shielding room shell through a hanger wire rod, a U-shaped clamp is mounted on the suspended ceiling batten, the lower end of the hanger wire rod is fixed on the U-shaped clamp through a bolt, the upper end of the hanger wire rod is fixed on the folded edge or stiffening rib of the galvanized steel plate through a bolt, and a suspended ceiling plate is arranged at the lower part of the suspended ceiling batten; a ground surface decoration layer is arranged on the bottom plate of the shielding room shell.
[0014] Further, the wall surface decoration layer adopts wood strip boards which are fixed on the wood batten through nailing, the ground surface decoration layer adopts PVC floor tiles, and the suspended ceiling plate adopts an oxidation-resistant aluminum alloy sound-absorbing plate.
[0015] The magnetic shielding room structure designed by the utility model adopts galvanized steel plates to replace the existing copper plates to assemble the shell of the shielding room, which not only can save 1 / 2 of the cost, but also can avoid the deformation of the shell, the shell is spliced by galvanized steel plates with folded edges, and only needs to be connected by bolts, so that the installation is convenient and fast, the construction speed and quality can be improved; the utility model also lays silicon steel plates at the bottom of the shielding room shell to enhance the magnetic induction intensity, which can improve the hydrogen nucleus resonance effect and the imaging quality of the nuclear magnetic resonance instrument placed on the magnet load-bearing foundation; the utility model also sets waterproof layers and insulation layers to prevent the shielding room from being waterlogged and losing insulation effect, and avoid the influence of static electricity on the nuclear magnetic resonance imaging; furthermore, the shell of the shielding room is spaced apart from the building main body by a certain distance around and at the top, so that the shielding room becomes an independent space and is not affected by thunderstorm weather, the galvanized steel plates used for the shell can block the interference of external electromagnetic fields, and the above structure design of the utility model can effectively guarantee the quality and stability of the nuclear magnetic resonance imaging. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a vertical partial cross-sectional view of the nuclear magnetic resonance shielding room in the embodiment;
[0017] Figure 2 This is a structural diagram of the shielding room shell connected by galvanized steel plates;
[0018] Figure 3 for Figure 2 Top view of the galvanized steel sheet hem joint.
[0019] Reference numerals:
[0020] 1. Galvanized steel sheet; 2. Folded edge; 3. Stiffening rib; 4. Galvanized bolt; 5. Gasket; 6. Galvanized nut; 7. Magnet load-bearing foundation; 8. Foam concrete; 9. Wall masonry; 10. Waterproof membrane; 11. Silicon steel sheet; 12. PVC insulation membrane; 13. PVC flooring; 14. Self-tapping screw; 15. Corner joint; 16. Wooden keel; 17. Rock wool layer; 18. Wall decorative surface; 19. Floor decorative surface. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.
[0022] This embodiment discloses a structure of a magnetic resonance imaging room for placing a magnetic resonance imaging device in a hospital's medical imaging department. Figure 1 As shown ( Figure 1 To simplify the schematic diagram, only partial sections of the shielding room floor and walls are captured, and the schematic diagram of the shielding room top is omitted). The entire shielding room shell is a square closed structure, and the shielding room shell is assembled by splicing galvanized steel plates 1. The electromagnetic waves outside the shielding room shell will be attracted by the free electrons in the galvanized steel plates 1 and slow down their propagation speed. Therefore, the galvanized steel plates 1 play a role in blocking the interference of the electromagnetic field outside the shielding room. The galvanized steel plates 1 are harder and cheaper than copper plates, which is very beneficial for reducing costs. In order to increase the assembly speed of the shielding room shell, the galvanized steel plates 1 in this embodiment are as follows. Figure 2 and Figure 3As shown, the four peripheral edges of each galvanized steel plate 1 are bent to form flanges 2, and the flanges 2 are provided with holes. When the galvanized steel plates 1 are assembled, the flanges 2 of adjacent galvanized steel plates 1 are made to correspond and abut together, and galvanized bolts 4 are used to pass through the holes in the flanges 2 to connect the galvanized steel plates 1 together. The galvanized bolts 4 are provided with gaskets 5 on both sides of the abutting flanges 2, and then galvanized nuts 6 are used to lock the galvanized bolts 4. The thickness of the galvanized steel plate 1 is not less than 1.5 mm. For large-sized galvanized steel plates 1, such as those with a width of more than 1.2 m, stiffening ribs 3 can be arranged in the middle of the galvanized steel plates 1 to avoid unstable deformation during transportation and installation.
[0023] The structure and construction process of the whole nuclear magnetic resonance shielding room are as follows:
[0024] 1) The ground base is constructed;
[0025] 2) The position of the magnet bearing foundation 7 is determined by line positioning on the ground base;
[0026] 3) The silicon steel plate 11 is laid at the position of the magnet bearing foundation 7;
[0027] The thickness of the silicon steel plate is not less than 0.5 mm, and the thickness of the silicon steel plate 11 in the embodiment is 0.5 mm. Because the position of the magnet bearing foundation 7 is used to place the nuclear magnetic resonance instrument, no ferromagnetic material is allowed to exist within a range of 300 mm at the lower part of the nuclear magnetic resonance instrument. Therefore, eight layers of silicon steel plates 11 are laid at the position of the magnet bearing foundation 7 in the embodiment.
[0028] 4) The magnet bearing foundation 7 is constructed on the laid silicon steel plate 11, and the magnet bearing foundation 7 is formed by concrete pouring, and the height thereof should not be less than 300 mm;
[0029] 5) The foam concrete 8 is backfilled around the magnet bearing foundation 7, and the backfilling height of the foam concrete 8 is flush with the top surface of the magnet bearing foundation 7; the foam concrete 8 has the characteristics of light weight and low elasticity, which can greatly reduce the post-settlement of the backfilled area, effectively guarantee the stability of the nuclear magnetic resonance instrument, and also has the effects of heat insulation, fire resistance, shock absorption, good durability and waterproof effect.
[0030] 6) The waterproof coiled material 10 is laid on the top surface of the magnet bearing foundation 7 and the top surface of the foam concrete 8;
[0031] In this embodiment, SBS waterproofing membrane is used. The SBS waterproofing membrane not only has good waterproofing effect, but also has certain insulation effect, which avoids the risk of water entering the shielded room and losing insulation effect, thereby avoiding the influence of static electricity on the magnetic resonance imaging. To ensure good waterproofing effect, two layers of waterproofing membrane 10 are laid on the top and bottom in this embodiment, and each layer of waterproofing membrane 10 can only be laid in a jointing manner, not in a lap jointing manner. When laying, the waterproofing membranes 10 of the upper and lower layers must be staggered.
[0032] 7) After the laying of the waterproofing membrane 10 is completed, silicon steel plates 11 are laid around the 0.5mT (magnetic field with a magnetic field strength of 0.5 millitesla) range except the magnet load-bearing foundation 7;
[0033] Since the machinery and equipment outside the shielded room will interfere with the magnetic field, causing the magnetic field to change, which will interfere with the quality of the magnetic resonance imaging. The maximum allowable magnetic flux density depends on the sensitivity of the equipment. Through calculation, it can be known that the minimum distance allowed within the 0.5mT range is 2.5m in the XY radial direction and 4m in the Z axis direction. Laying silicon steel plates 11 within this range can reduce hysteresis loss, enhance magnetic induction intensity, and improve the effect of hydrogen nucleus resonance, so that the specific frequency electrical signal emitted by the hydrogen nucleus in the human body is stronger, and therefore it is easier to be recorded by the receiver. Eight layers of silicon steel plates 11 are also laid in this step.
[0034] 8) After step 7) is completed, PVC insulation membrane 12 is laid on the top surface of the magnet load-bearing foundation 7 and the top surface of the silicon steel plates 11 around it; the PVC insulation membrane 12 has good electrical insulation performance, so that the shielded room shell bottom and the ground of the magnetic resonance machine room have excellent insulation effect, avoiding interference with the quality of the magnetic resonance imaging due to static electricity. In order to ensure the flatness of the ground, the PVC insulation membrane 12 is laid in a jointing manner, not in a lap jointing manner.
[0035] 9) The shielded room shell is formed by overlapping the PVC insulation membrane 12. When the shielded room shell is constructed, the four sides and the top surface of the shielded room shell need to be kept a certain distance from the building body to avoid contact, so as to protect the insulation effect of the shielded room shell. In this embodiment, the distance between the side wall of the shielded room shell and the wall masonry 9 is 80mm-100mm, and the distance between the top surface of the shielded room shell and the roof of the building body is controlled to be more than 1000mm.
[0036] 10): after the construction and installation of the shielding room shell are completed, wood keel 16 is installed on the wall surface of the shielding room shell, and the wood keel 16 is fixed on the folded edge 2 or the stiffening rib 3 of the galvanized steel plate 1 through the angle joint 15 by screws. Since the fire resistance of the galvanized steel plate 1 is poor, in the embodiment, a rock wool layer 17 is filled between the wall surface of the shielding room shell in the range of the height of the suspended ceiling and the wood keel 16, which effectively guarantees the fire control capability of the shielding room, and the rock wool layer 17 has good sound absorption and sound insulation effects, and can reduce the noise interference of the nuclear magnetic resonance instrument on the external environment.
[0037] 11): installation of the suspended ceiling keel; the shielding room should avoid ferromagnetic metals as much as possible, and the ferromagnetic metals can interfere with nuclear magnetic resonance, and in the embodiment, the suspended ceiling keel is made of aluminum alloy, the suspended ceiling keel is connected with the top of the shielding room shell through a hanging wire rod, a U-shaped clamp is installed on the suspended ceiling keel, the lower end of the hanging wire rod is fixed on the U-shaped clamp by bolts, and the upper end of the hanging wire rod is fixed on the folded edge 2 or the stiffening rib 3 of the galvanized steel plate 1 by bolts.
[0038] 12): decoration surface layer construction;
[0039] The rock wool layer 17 is externally provided with a wall decoration surface layer 18, and in the embodiment, the wall decoration surface layer 18 is made of wooden strips and is fixed on the wood keel 16 by nailing. A ground decoration surface layer 19 is laid on the bottom surface of the shielding room shell, and in the embodiment, the ground decoration surface layer 19 is made of PVC floor tiles 13 and is fixed by self-tapping screws 14, and the PVC floor tiles have good fireproof performance and good wear resistance. The lower part of the suspended ceiling keel is provided with a suspended ceiling plate, and in the embodiment, the suspended ceiling plate is made of an oxidation-resistant aluminum alloy sound-absorbing plate, which has good fireproof performance and good sound absorption effect.
[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A nuclear magnetic resonance magnetic shielded room construction comprising a shielded room housing, characterised in that: The shielding room shell is assembled by galvanized steel plates, the edges of each galvanized steel plate are folded, holes are formed on the folded edges, the folded edges of adjacent galvanized steel plates are matched and connected by bolts passing through the holes, a magnet bearing foundation is arranged on the bottom of the shielding room shell, a silicon steel plate is arranged on the bottom of the magnet bearing foundation, the magnet bearing foundation is backfilled with foam concrete until the top surface of the magnet bearing foundation is flush with the top surface of the magnet bearing foundation, a waterproof roll is arranged on the top surface of the magnet bearing foundation and the top surface of the foam concrete, a silicon steel plate is arranged on the surface of the waterproof roll around the magnet bearing foundation, a PVC insulation roll is arranged on the top surface of the magnet bearing foundation and the top surface of the silicon steel plate around the magnet bearing foundation, and the shielding room shell is arranged on the top of the PVC insulation roll.
2. A nuclear magnetic resonance magnet shielded room configuration according to claim 1, wherein: The height of the magnet bearing foundation is not less than 300 mm.
3. A magnetic shielding room configuration for nuclear magnetic resonance according to claim 1, characterized in that: The waterproof roll is SBS waterproof roll, two layers of the waterproof roll are arranged, and the two layers of the waterproof roll are arranged by jointing, and the two layers of the waterproof roll are jointed in staggered manner.
4. A magnetic shielding room configuration for nuclear magnetic resonance according to claim 1, characterized in that: The edges of the waterproof roll are turned up to the wall surface in the building body.
5. A nuclear magnetic resonance magnet shielded room configuration according to claim 4, wherein: The turning-up height of the waterproof roll is not less than 500 mm.
6. A magnetic shielding room configuration for nuclear magnetic resonance according to claim 1, characterized in that: The thickness of the silicon steel plate is not less than 0.5 mm, and eight layers of the silicon steel plate are arranged on the bottom of the magnet bearing foundation.
7. A magnetic shielding room configuration for nuclear magnetic resonance according to claim 1, characterized in that: The thickness of the galvanized steel plate is not less than 1.5 mm, and a stiffening rib is arranged in the middle of the large-size galvanized steel plate.
8. A magnetic resonance shielded room construction according to claim 1, characterised in that: The distance between the shielding room shell and the wall surface in the building body is 80-100 mm, and the distance between the shielding room shell and the roof in the building body is not less than 1000 mm.
9. A magnetic shielding room configuration for nuclear magnetic resonance according to claim 7, characterized in that: Wooden battens are arranged on the inner surface of the side wall of the shielding room shell, the wooden battens are fixedly connected with the folded edges or the stiffening ribs of the galvanized steel plates by angle connectors and bolts, a rock wool layer is filled between the side wall of the shielding room shell and the wooden battens, and a wall surface decoration layer is arranged outside the rock wool layer; aluminum alloy ceiling battens are arranged on the top of the shielding room shell, the ceiling battens are connected with the top of the shielding room shell by hanger wires, U-shaped clamps are arranged on the ceiling battens, the lower ends of the hanger wires are fixed on the U-shaped clamps by bolts, the upper ends of the hanger wires are fixed on the folded edges or the stiffening ribs of the galvanized steel plates by bolts, and ceiling plates are arranged on the lower parts of the ceiling battens; a ground surface decoration layer is arranged on the bottom plate of the shielding room shell.
10. A magnetic resonance shielded room construction according to claim 9, characterised in that: The wall surface decoration layer is wooden slats, the wooden slats are fixed on the wooden battens by nailing, the ground surface decoration layer is PVC floor tile, and the ceiling plates are oxidation-resistant aluminum alloy sound-absorbing plates.