CN2342392Y - Magnetic clip for fixed ray photographic film - Google Patents
Magnetic clip for fixed ray photographic film Download PDFInfo
- Publication number
- CN2342392Y CN2342392Y CN 98207837 CN98207837U CN2342392Y CN 2342392 Y CN2342392 Y CN 2342392Y CN 98207837 CN98207837 CN 98207837 CN 98207837 U CN98207837 U CN 98207837U CN 2342392 Y CN2342392 Y CN 2342392Y
- Authority
- CN
- China
- Prior art keywords
- magnetic
- magnetic patch
- pallet
- pressing plate
- tray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The utility model relates to a magnetic clamping for fixing radiographic negatives. A magnetic block made of Nd-Fe-B magnetic materials is provided with a tray matching with the shape of the magnetic block, and the magnetic block and the tray are provided with a through hole in the center. The both ends of a press plate are provided with eyelets. A sunk screw successively passes through the magnetic block, the tray and the press plate, and is fixed on the other side of the press plate by screw nuts. A gap between the magnetic block and the tray is sealed by epoxy resin. The magnetic clamp is used for fixing negatives during the nondestructive flaw detection of pressure containers. Compared with the existing fixing devices, the utility model has the advantages of portability, reliability, long service life, convenient operation and convenient storage and transportation.
Description
The utility model belongs to the device of fixing industrial radiographic film in the nondestructive examination detection.
When large pressurized vessel being implemented bifurcation ray panorama exposure nondestructive testing technique, need on chamber wall, arrange photographic negative in a large number.Main at present employing adhesive tape or magnetic material are fixed on egative film on the chamber wall.
With the fixing egative film of adhesive tape bonding, uses fairly simple, but require surface of the work clean, then cementation is not firm if dirt is arranged, adhesive tape easy the wearing out of being heated comes off, and egative film is scrapped; Take off when getting egative film, damage camera bag easily, cause the film exposure, after flaw detection finishes, remain in the adhesive tape easy-clear and influence next procedure not on the surface of the work.
Magnetic material is fixing all to be to adopt permanent-magnet block to push down film it is adsorbed on the workpiece at present, and its shortcoming mainly is that volume is big.Weight is big, operation labour intensity is big, transports, deposits all inconvenient when using in a large number; Suction deadweight relatively is less, especially comes off easily when the tank body Lower Half is used, and breaks easily; Cover egative film area big (accounting for 1/4), be easy to generate backward scattering.
" industrial radiography film stationary installation " (CN89202459.3 patent) is a kind of magnetic material stationary installation, be formed by connecting by bearing pin by flexible pressing plate that is stained with resilient material and the end plate that magnetic is housed, energy detection plane sheet material weld seam and curved surface material weld seam, but structure more complicated, magnetic patch is big, weight is big, still has above-mentioned many deficiencies.
The application is intended to overcome the deficiencies in the prior art, provide a kind of simple in structure, magnetic patch is little, in light weight, magnetic circuit is reasonable, suction is big, is convenient to operate the fixedly magnetic folder of transportation, long service life.
The utility model comprises pressing plate and magnetic patch, magnetic patch selects for use NdFeB material to make rather than permanent magnet, it has the national act.std of usefulness to claim the steel of Q235 promptly to claim the pallet of the material of A3 steel (ordinary low-carbon steel) in the past, its shape matches with the profile of magnetic patch, can be bowl-shape or other shape.Magnetic patch and pallet have the through hole that can pass sunk screw.Pressing plate Q235 material, the two ends perforation.The eyelet that sunk screw passes magnetic patch, pallet and pressing plate successively connects together them and in the knot sealing.
Because magnetic patch has pallet, magnetic patch and pallet can produce new magnetic circuit, thereby have improved the magnetic circuit condition, have improved to sting and have puted forth effort, otherwise had only the single magnetic circuit of two magnetic patch formation of pressing plate two.Add and select neodymium-iron-boron magnetic material for use, its remanent magnetism Br=1.16-1.241T. coercivity H 〉=680KA/m, HCJ JHc 〉=955KA/m, ceiling capacity Bhmaxl=264-288KJ/m
3Its absorption affinity is than the big order of magnitude of permanent magnet, and therefore under equal volume or weight, its magnetic force is more much bigger than permanent magnet, and promptly magnetic patch can be very little and magnetic force is bigger.In addition, adopt pallet and with the gap between epoxy bond sealing magnetic patch and the pallet, it is bad to protect magnetic patch not fallen clashing and breaking, has improved globality and serviceable life.
Following drawings and Examples can further specify the utility model.
Fig. 1 is the floor map of magnetic folder;
Fig. 2 is the A-A diagrammatic cross-section of Fig. 1.
Embodiment: the fixing magnetic folder of radiography film, the magnet 4 that has bowl-shape GYRON35 NdFeB material to make, it has a pallet 1 that matches with its profile, and the center drilling of magnetic patch 4 and pallet 1 can pass sunk screw, pressing plate 5 is thinner, certain intensity is arranged, available hand bending, its two ends perforation, the eyelet that sunk screw 3 passes magnetic patch 4, pallet 1 and pressing plate 5 successively is cascaded them, and is fixing with nut 6 at the another side of pressing plate.Certainly, the top of the head of sunk screw and pallet 1 all can not be higher than the upper surface of magnetic patch 4, otherwise it is bad that magnetic patch 4 will be contacted with surface of the work.Gapped between magnetic patch 4 and the pallet 1, be bonded and sealed with epoxy resin 2 fillings.Pallet 1 and pressing plate 5 are all used the Q235 material.
During use, magnetic folder is placed on four jiaos of egative film camera bag, compresses egative film (can according to the flexibility of the curvature adjustment pressing plate of surface of the work) and be placed on two magnetic patch outside the egative film or pressing a little, can implement Non-Destructive Testing with pressing plate 5.If plate dimension is bigger, can also between the pressing plate of two magnetic folders, connect a compressing tablet again.
For preventing corrosion, the surperficial degree zinc of pallet 1 and pressing plate 5.
Claims (1)
1. fixedly the magnetic of radiography film presss from both sides, comprise pressing plate and magnetic patch, it is characterized in that magnetic patch has the pallet of a Q235 material that matches with its profile, magnetic patch and the said pallet of selecting for use the GYRON35 NdFeB material to make have the through hole that can pass sunk screw at the center, the two ends of the pressing plate of Q235 material have eyelet, the eyelet that sunk screw passes magnetic patch, pallet and pressing plate successively connects together them and fixes with nut at the pressing plate another side, gapped between said magnetic patch and the pallet, fill sealing with epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98207837 CN2342392Y (en) | 1998-08-18 | 1998-08-18 | Magnetic clip for fixed ray photographic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98207837 CN2342392Y (en) | 1998-08-18 | 1998-08-18 | Magnetic clip for fixed ray photographic film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2342392Y true CN2342392Y (en) | 1999-10-06 |
Family
ID=33963680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98207837 Expired - Fee Related CN2342392Y (en) | 1998-08-18 | 1998-08-18 | Magnetic clip for fixed ray photographic film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2342392Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326001C (en) * | 2000-04-18 | 2007-07-11 | 索尼公司 | Image recording device and holographic recording medium film cassette |
-
1998
- 1998-08-18 CN CN 98207837 patent/CN2342392Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326001C (en) * | 2000-04-18 | 2007-07-11 | 索尼公司 | Image recording device and holographic recording medium film cassette |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |