EP0513515B1 - Blindage pour un appareil de gammagraphie - Google Patents

Blindage pour un appareil de gammagraphie Download PDF

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Publication number
EP0513515B1
EP0513515B1 EP19920105745 EP92105745A EP0513515B1 EP 0513515 B1 EP0513515 B1 EP 0513515B1 EP 19920105745 EP19920105745 EP 19920105745 EP 92105745 A EP92105745 A EP 92105745A EP 0513515 B1 EP0513515 B1 EP 0513515B1
Authority
EP
European Patent Office
Prior art keywords
shielding body
coupling
tube
channel
gammagraphy
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 - Lifetime
Application number
EP19920105745
Other languages
German (de)
English (en)
Other versions
EP0513515A3 (en
EP0513515A2 (fr
Inventor
Karl Weinlich
Rainer Dr. Link
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ISOTOPEN-TECHNIK DR SAUERWEIN GmbH
Original Assignee
ISOTOPEN-TECHNIK DR SAUERWEIN GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ISOTOPEN-TECHNIK DR SAUERWEIN GmbH filed Critical ISOTOPEN-TECHNIK DR SAUERWEIN GmbH
Publication of EP0513515A2 publication Critical patent/EP0513515A2/fr
Publication of EP0513515A3 publication Critical patent/EP0513515A3/de
Application granted granted Critical
Publication of EP0513515B1 publication Critical patent/EP0513515B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F5/00—Transportable or portable shielded containers
    • G21F5/02—Transportable or portable shielded containers with provision for restricted exposure of a radiation source within the container
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/08—Metals; Alloys; Cermets, i.e. sintered mixtures of ceramics and metals

Definitions

  • the invention relates to a shielding body for a gamma imaging device with a radiator which can be extended from a shielding body, a coupling for an extension tube and a channel in the shielding body which prevents radiation from escaping when the radiator is retracted.
  • Such gammagraphy devices are used for the safe handling of radioactive emitters, for example in the non-destructive radiation test of workpieces. These devices not only have to ensure safe protection of the operating personnel against radioactive radiation when the emitter has moved back into the shielding body, they also have to enable safe remote control when the emitter is extended from the shielding body into the area of a workpiece. To achieve this, gammagraphy devices are known that guarantee a high degree of safety through complex radiation protection and a semi or fully automatic operation. However, these devices are complex and accordingly heavy and complicated to use.
  • the invention is therefore based on the object of providing an easy-to-use shielding body for a gammagraphy device which, despite adequate radiation protection, ensures low weight and a high level of security against incorrect operation.
  • a helically twisted channel is arranged in the shielding body for guiding a movable radiator.
  • the channel can be made more compact compared to, for example, S-shaped channels known from US Pat. No. 3,593,594, as a result of which the shielding body becomes smaller and lighter.
  • the shielding body can at least partially consist of tungsten powder compressed with a heat-resistant binder; it can also consist, for example, of an essentially spherical part made of a high-density material, for example depleted uranium with an essentially diametrically extending channel and a channel located in front of the channel exit essential cylindrical part consist of tungsten powder compressed with a heat-resistant binder with the axially offset and spatially twisted channel arranged therein.
  • the uranium ball provides a uniform shielding of the beam in all directions when it has moved back to the center of the ball.
  • the cylindrical part made of tungsten powder in front of the duct outlet serves to shield the duct outlet and for this purpose receives the twisted duct, so that reliable shielding is also ensured in this area.
  • the cylindrical part consists of tungsten powder compressed with a heat-resistant binder
  • the twisted channel can be produced in a simple manner from a tube embedded in the tungsten powder and protruding into a diametrical bore in the uranium ball.
  • the gammagraphy device can be provided with a safety lock to prevent the radiator from being extended without a connected extension hose and / or without a connected remote control for the radiator.
  • the safety lock can consist of a locking slide for the spotlight which can be displaced transversely to the channel axis, an axially displaceable locking block which can be coupled to the movement of the spotlight and which releases the locking slide in the retracted position of the spotlight, and at least one locking block actuated by the coupling of the extension tube , the locking slide with the release hose not released, the lock.
  • the locking slide can have a transverse bore for the locking stone and at least one transverse bore for the bolt as well as a shoulder in the bore for the locking stone which interacts with a notch in an actuating tube.
  • the radiator can be arranged on a cable guided through the locking stone and the actuating tube and can be arranged in a head that is somewhat thickened relative to the bore in the actuating tube.
  • the coupling for the remote control can be arranged opposite to the coupling for the extension hose on the gammagraphy device; they actuate axially displaceable locking pins, which interact with the locking slide, via coupling sleeves in the sense of unlocking when the extension tube is properly coupled and the operator is coupled.
  • the gammagraphy device has a cylindrical housing 1 which is closed at both ends by an end plate 2.
  • An intermediate plate 3 is arranged in the central region of the housing 1.
  • the Gammagraphy device is provided with a carrying handle 4 and a foot 5 in order to be able to handle it easily.
  • a spherical part 6 of a shielding body 23 made of depleted uranium is arranged between one of the end plates 2 and the intermediate plate 3.
  • the uranium ball 6 has cylindrical extensions 7 which engage in corresponding approaches of the end plate 2 and the intermediate plate 3 and hold the uranium ball 6.
  • a diametrical bore extends from a part 8 of smaller diameter and a part 9 of larger diameter reaching to the center of the uranium ball 6.
  • a cylindrical part 10 of the shielding body 23 adjoins the cylindrical extension 7 with the diametrical bore 9 of larger diameter, which consists of a tube piece 11 made of tungsten powder 12 compressed with a heat-resistant binder.
  • the pipe section 11 is screwed to the intermediate plate 3 and the end plate 2.
  • a helically bent tube 13 is embedded, which serves as a channel 37 for extending a gamma emitter 18.
  • One end of the tube 13 protrudes from the cylindrical Part 10 out and into the hole 9 of larger diameter in the uranium ball 6. In this way, the channel 37 goes directly into the diametrical bore 8 of smaller diameter in the uranium ball 6.
  • a coupling 14 for an extension hose with a coupling sleeve 15 and a coupling 16 for remote control with a coupling sleeve 17 are arranged.
  • the remote control can be coupled via the coupling 16 with an articulated connection 20 to a gamma emitter 18 arranged in a radiator holding head 19.
  • a flexible cable 21 of the remote control extends into the area of the coupling 16 and can be coupled to the articulated connection 20 when the coupling 16 is connected.
  • An axially displaceable actuating tube 22 is arranged in the bore 8, the inner diameter of which is large enough to allow the articulated connection 20 and the flexible cable 21 to be displaced axially. However, the diameter of the radiator holding head 19 is so large that it cannot be retracted into the actuating tube 22.
  • both a bolt in the form of a pin 28 and a bolt in the form of a pin 38 are engaged in corresponding bores 33, 34 of the locking slide 24.
  • a shoulder 36 engages behind a notch 35 in a transverse bore 32 in the locking slide 24 in the actuating tube 22 and in the articulated connection 20 of the radiator holding head 19; it thereby prevents the gamma emitter 18 from unintentionally coming out of the channel 37.
  • the extension hose is coupled to the gammagraphy device via the coupling 14 and the remote control via the coupling 16, the coupling sleeves 15 and 17 effect this by means of a pin 31, a lever 30 and a connection 29 Withdrawing the bolt 28 and moving the bolt 38, which thus emerge from the bores 33, 34 in the locking slide 24.
  • the unlocked locking slide 24 can be moved laterally until it reaches the position shown in FIG. 6. In this position, a transverse bore 32 in the locking slide 24 is aligned with the locking block 26, while the shoulder 36 from the area of the notch 35 in the articulated connection 20 and the actuating tube 22 is moved out.
  • the locking block 26 comes under the action of a compression spring 27 into the region of the transverse bore 32 and holds the locking slide 24 in the unlocked position.
  • the gamma emitter 18 in the emitter holder head 19 can now be moved by means of the articulated connection 20 and the flexible cable 21 of the remote control coupled therewith through the channel 37 and the coupling 14 into the extension tube until it reaches the area where the non-destructive material testing takes place to be carried out.
  • the gamma emitter 18 can be moved back into the shielding body 23 in the reverse manner, after which there is again a locking according to FIG. 5.
  • the couplings 14, 15 can be released from the gammagraphy device, which can now be transported to another location.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Ceramic Engineering (AREA)
  • Metallurgy (AREA)
  • Radiation-Therapy Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Claims (4)

  1. Corps de blindage (23) d'un appareil de gammagraphie, présentant un canal (37) enroulé en forme de spirale pour guider une source de rayonnement (18) qui peut être déplacée.
  2. Corps de blindage selon la revendication 1, caractérisé par le fait qu'il est constitué, du moins partiellement (10), par de la poudre de tungstène (12) qui est comprimée avec un liant résistant à la chaleur.
  3. Corps de blindage selon la revendicaton 2, caractérisé par une pièce (6), pour l'essentiel sphérique, en uranium appauvri comprenant un canal (8, 9) qui s'étend pour l'essentiel dans le sens radial, et par une partie (10), pour l'essentiel cylindrique, en poudre de tungstène (12) comprimée avec un liant résistant à la chaleur qui se trouve devant la sortie du canal et qui comprend le canal (37) enroulé en forme de spirale.
  4. Corps de blindage selon la revendication 3, caractérisé par le fait que le canal (37) enroulé en forme de spirale est constitué par un tube (13) qui fait saillie dans un perçage radial (9) ménagé dans la sphère en uranium (6).
EP19920105745 1991-05-16 1992-04-03 Blindage pour un appareil de gammagraphie Expired - Lifetime EP0513515B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4116022 1991-05-16
DE19914116022 DE4116022C2 (de) 1991-05-16 1991-05-16 Abschirmkörper eines Gammagraphie-Geräts

Publications (3)

Publication Number Publication Date
EP0513515A2 EP0513515A2 (fr) 1992-11-19
EP0513515A3 EP0513515A3 (en) 1993-12-01
EP0513515B1 true EP0513515B1 (fr) 1997-07-16

Family

ID=6431797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920105745 Expired - Lifetime EP0513515B1 (fr) 1991-05-16 1992-04-03 Blindage pour un appareil de gammagraphie

Country Status (2)

Country Link
EP (1) EP0513515B1 (fr)
DE (1) DE4116022C2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1016402C2 (nl) * 2000-10-13 2002-04-16 Ntgen Tech Dienst B V R Kanaalcontainer voor het opslaan van een radioaktieve bron.
DE102011077637A1 (de) * 2011-06-16 2012-12-20 Endress + Hauser Gmbh + Co. Kg Strahlenschutzbehälter
CA3039810C (fr) 2016-10-11 2021-05-18 Source Production & Equipment Co., Inc. Distribution de rayonnement

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3039000A (en) * 1956-07-14 1962-06-12 Schwarzkopf Dev Co Radiation shield structures and their production
US3593594A (en) * 1968-10-04 1971-07-20 Technical Operations Inc Apparatus for manipulating radioactive material to and from a storage unit
DE6801318U (de) * 1968-10-08 1969-04-17 Nuclear Gmbh Kernphysikalische Sicherheitsvorrichtung fuer isotopenarbeitsgeraete
DE2727359C2 (de) * 1977-06-16 1986-02-20 Sauerwein, Kurt, Dr., 5657 Haan Radiographiegerät mit Strahlerkapsel
US4211928A (en) * 1978-11-27 1980-07-08 Technical Operations, Incorporated Linear storage projector
US4314157A (en) * 1979-06-21 1982-02-02 Industrial Nuclear Company, Inc. Safety lock for radiography exposure device
GB2061080B (en) * 1979-10-06 1984-08-30 Pantatron Systems Ltd Shielding container
DE3313857A1 (de) * 1983-04-16 1984-10-25 Sauerwein, Kurt, Dr., 5657 Haan Rohrkanalweiche
DE3335438C2 (de) * 1983-09-30 1985-09-05 Sauerwein, Kurt, Dr., 5657 Haan Strahlenbehandlungsgerät
DE3346355C2 (de) * 1983-12-22 1985-11-07 Nukem Gmbh, 6450 Hanau Behälter zur Endlagerung von radioaktiven Abfällen
NL8400108A (nl) * 1984-01-12 1985-08-01 Hooft Eric T Werkwijze en inrichting voor het behandelen van een lichaamsdeel met radioactief materiaal.
JPH0699721B2 (ja) * 1985-12-02 1994-12-07 株式会社東芝 γ線遮蔽材用タングステン粉末とその製造方法
FR2609898B1 (fr) * 1987-01-28 1989-03-31 Commissariat Energie Atomique Dispositif d'entrainement et de positionnement d'un porte-sources dans un applicateur utilise en curietherapie
US4868400A (en) * 1987-09-02 1989-09-19 Chem-Nuclear Systems, Inc. Ductile iron cask with encapsulated uranium, tungsten or other dense metal shielding
DE4012398A1 (de) * 1990-04-19 1991-10-24 Waelischmiller Hans Dipl Ing F Bestrahlungsvorrichtung

Also Published As

Publication number Publication date
DE4116022A1 (de) 1992-11-19
DE4116022C2 (de) 1995-03-23
EP0513515A3 (en) 1993-12-01
EP0513515A2 (fr) 1992-11-19

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