WO1998024694A2 - Systeme de fonctionnement pour dispositifs d'irradiation de produits - Google Patents

Systeme de fonctionnement pour dispositifs d'irradiation de produits Download PDF

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Publication number
WO1998024694A2
WO1998024694A2 PCT/EP1997/006604 EP9706604W WO9824694A2 WO 1998024694 A2 WO1998024694 A2 WO 1998024694A2 EP 9706604 W EP9706604 W EP 9706604W WO 9824694 A2 WO9824694 A2 WO 9824694A2
Authority
WO
WIPO (PCT)
Prior art keywords
radiation
transport
drive
pallet
control system
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.)
Ceased
Application number
PCT/EP1997/006604
Other languages
German (de)
English (en)
Other versions
WO1998024694A3 (fr
Inventor
Gerhard HÜBNER
Manfred Zeising
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.)
GAMMA-SERVICE PRODUKTBESTRAHLUNG GmbH
Original Assignee
GAMMA-SERVICE PRODUKTBESTRAHLUNG 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
Priority claimed from DE19650842A external-priority patent/DE19650842A1/de
Priority claimed from DE1996150845 external-priority patent/DE19650845A1/de
Priority claimed from DE1996150843 external-priority patent/DE19650843C2/de
Application filed by GAMMA-SERVICE PRODUKTBESTRAHLUNG GmbH filed Critical GAMMA-SERVICE PRODUKTBESTRAHLUNG GmbH
Priority to AU55567/98A priority Critical patent/AU5556798A/en
Publication of WO1998024694A2 publication Critical patent/WO1998024694A2/fr
Publication of WO1998024694A3 publication Critical patent/WO1998024694A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B10/00—Power and free systems
    • B61B10/02—Power and free systems with suspended vehicles
    • B61B10/025—Coupling and uncoupling means between power track abd vehicles
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/001—Details of apparatus, e.g. pressure feed valves or for transport, or loading or unloading manipulation
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/50—Preservation of foods or foodstuffs, in general by irradiation without heating

Definitions

  • the invention relates to an operating system for product irradiation systems, consisting of a drive and control system, a pallet pass-through system and a safety system, and is applicable in particular for the sterilization of a wide variety of products with high-energy gamma radiation, for example medical articles, packaging materials and plastics.
  • a disadvantage of the known solutions is that the material flow is ineffective and the transport and its control is complex and is not ruled out with absolute certainty that the products to be irradiated can come into contact with the radiation sources or even radiation sources can fall on the radiation material.
  • the invention is therefore based on the object of providing an operating system for product irradiation systems which enables an effective continuous or discontinuous run and uniform irradiation and is simple and economical to produce and operate reliably and adaptable to a wide variety of requirements and which ensures a long service life and system safety and reliably prevents direct contact between radiation sources and radiation material.
  • a particular advantage of the invention is that the material to be irradiated is transported through the irradiation room effectively and reliably in a controlled manner without direct contact with the radiation sources, the drive and control system ensuring an optimal dose distribution with little inhomogeneity by driving the transport carriage via a
  • the chain running in an upper power rail and the carriages running in a lower free rail take place in such a way that the specific engagement and disengagement of the carriages is realized via stoppers and drivers, the stoppers being actuated by all-metal pneumatic cylinders and the position being recorded
  • Transport trolleys for transport control are carried out via switching lugs arranged between a crossbeam and the free rail and interacting with sensors.
  • the specially controlled, circulating conveyor system enables optimal radiation technology by varying the circulation time or cycle time, setting the circulation and changing the irradiation position.
  • Another advantage of the invention is that the entire drive with sensors is designed in a radiation-resistant form and the radiation-sensitive components of the system are mounted outside the radiation room, the sensors being either air sensors or magnetic sensors and the associated signal lines being led through the ceiling of the radiation room .
  • the stoppers for latching and uncoupling interact with switching pawls for lifting out the carriers and retaining pawls with a leading edge for the carriages, the driver can be lifted by the switching pawl or latched into the chain, depending on the predetermined program.
  • the pallet flow system ensures an optimal dose distribution with low inhomogeneity by arranging the pallets in transport trolleys and rotating the transport trolleys by 180 ° by an internal rotating device and by 180 ° rotating by an external rotating device or the Radiation sources are arranged in at least two spatially separated surface sources and the pallets in transport vehicles are first transported along one of the outer sides of the surface sources, subsequently between the opposite inner sides of the surface sources and finally along the remaining outer side.
  • the terms “inner” and “outer” turning device refer to the radiation room, which is formed by appropriate walls for radiation shielding.
  • the specially controlled, circulating conveyor system enables optimal radiation technology by varying the circulation time or cycle time, setting the circulation and changing the irradiation position.
  • Another advantage of the invention is that the products to be irradiated are subjected to a largely identical radiation dose in several passes through the irradiation room by automatically changing the irradiation position of the pallets in the transport carriage outside the irradiation room.
  • Another advantage of the invention is the security system, the radiation sources being positioned in source frames, which are enclosed by a source basket, around which a closed shaft is made and the trolleys have sides that are closed on all sides and the trolleys have security doors that are only outside the Irradiation room can be opened, with the security door being opened upwards.
  • Figure 1 is a schematic sectional view of the conveyor system with sensors.
  • Figure 2 is a detailed view of the stopper for latching and uncoupling the trolley in the "OPEN"position;
  • FIG. 3 shows a detailed view of the stopper for latching and uncoupling the transport trolleys in the “CLOSED” position
  • Fig. 4 is a detailed view of the switch operation
  • FIG. 5 shows a schematic illustration of the pallet pass system with a surface source
  • Fig. 6 is a schematic representation of the
  • Fig. 7 is a schematic representation of the arrangement of the radiation sources and the radiation material.
  • the drive and control system is designed as an overhead conveyor system, hereinafter referred to as the power-and-free system, and transports the pallets loaded with the products to be irradiated in attached trolleys 1 with all sides closed, which in the present embodiment are formed from sheet metal.
  • the power-and-free system consists of two rails arranged one above the other, the power rail 2 and the free rail 3.
  • a chain runs continuously in the upper power rail 2 and pulls over drivers 13 the carriages 4 running in the lower free rail 3 on which the transport carriages 1 hang.
  • the trolleys 1 can be uncoupled from the chain or re-engaged as required via the trolleys 4.
  • the system thus enables a discontinuous material flow.
  • the decoupling and latching is realized via the stoppers 5, which are arranged as required.
  • the throughput of the trolleys 1 is controlled by the control according to a predetermined program.
  • the trolleys 1 are guided by the power-and-free system through a labyrinth of material according to a defined driving regime around the source basket with the radiation sources, it being possible for a 180 ° rotation to take place after passing through the radiation axis. This rotation enables a uniform action of the radiation, which leads to a favorable dose distribution in the radiation material.
  • the transport carriage 1 is transported outward through the labyrinth of material, rotated back through 180 ° and, if necessary, returned to the transfer station according to appropriately programmed waiting positions.
  • other modes of operation are possible.
  • the transport trolley for transporting the material to be conveyed is fastened to the carriage 4 of the power and free conveyor with a cross member 7.
  • the transport carriage 1 is rotatably mounted about a centrally arranged pin 7a and mechanically locked during the journey.
  • Switch lugs 8 are arranged between the cross member 7 and the carriage 4, which generate signals in the sensors 9 when they pass through the sensor arrangement and thereby report the carriage position.
  • the sensors 9 are designed as air sensors. ren executed.
  • the air sensors form an air barrier, consisting of a transmitter and a receiver nozzle, which are supplied by a supply air pressure. If the air flow between the transmitter and receiver nozzles is interrupted by the switching lugs 8, the signal is triggered.
  • the signal lines are designed as metallic tubes and are led out of the radiation room.
  • the use of magnetic sensors 9 is possible, the magnetic field being influenced here by the switching lugs 8 and the signal formation resulting therefrom.
  • the signal lines are radiation-resistant electrical lines, which are also led out of the radiation room through the ceiling.
  • the pawl 5a of a stopper 5 is actuated with an all-metal pneumatic cylinder 6, as shown in FIGS. 2 and 3.
  • the driver 13 is thus latched into the chain. If the running trolley 1 is to be stopped at a defined point, the stopper 5 is activated and actuated via the all-metal pneumatic cylinder 6.
  • the pawl 5a then lifts the driver 13.
  • At least one compensating element 11 for piston relief and a drive transmission mechanism 12 are arranged between the pneumatic cylinder 6 and the switching pawl 5a or the holding pawl 5b.
  • the direction of travel of the trolleys 1 is changed using switches 16.
  • the basic structure of the switches is shown in FIG. 4.
  • An all-metal pneumatic cylinder 6a which is constructed identically to the all-metal pneumatic cylinder 6 for actuating the Stopper 5, actuates the switch tongue 14.
  • the switch position is monitored by sensors 9a, the sensors 9a being air sensors or magnetic sensors and having the same construction as the sensors 9.
  • a transport trolley 1, which is to run several times around the radiation sources in the irradiation room without being reloaded, is not guided to the outside by a corresponding switch, but is guided directly over the circulation.
  • the control program specifies which transport carriage should circulate directly and is triggered by a detection system for the transport carriage.
  • the product data and the target irradiation parameters are recorded for process control in at least one computer which is connected to at least one programmable logic controller for the system for data transfer and data exchange.
  • This computer is an integral part of process control and is used exclusively for human-machine communication using special control computer software.
  • FIG. 5 and 6 show two variant solutions for the circulation of the products to be irradiated arranged on the pallets in transport trolleys 1.
  • the goods stacked on the pallet should advantageously already be provided by the producer with a load securing device (stretch film or similar).
  • the load securing should ensure exact compliance with the outer pallet dimensions during the pallet circulation.
  • the radiation system according to the present embodiment is designed for a daily output of max. 120 pallets laid out (max. 190 m / day).
  • a prerequisite for the maximum throughput is the full loading of the source basket, an optimal product structure (irradiation parameters, lot size) and an exact organized logistics (delivery, Collection) .
  • the pallet system described here has a maximum annual capacity of approx. 50,000 m.
  • Incoming pallets are delivered by truck, unloaded with a forklift and handed over directly to a first conveyor line. The actuation of the conveyor line during the pallet transfer is blocked with a safety light barrier.
  • the conveyor line consists of two accumulation roller conveyors and the identification point.
  • the contour is checked at the identification point, the weight and the pallet height are determined and product or pallet data is entered into a PC.
  • the pallets are taken from the pallet rack by forklift or directly from the goods receipt line to a second conveyor line and placed on a first conveyor. This transfers the pallets to the accumulation roller conveyor, where the pallets are continuously accumulated without any pressure.
  • the pallets go from the accumulation roller conveyor to the roller conveyor with centering. This is also equipped with a centering device in the longitudinal and transverse directions. The pallet is pressed against stop bars by means of an eccentric. The pallet converter takes over the pallet from this centered position.
  • the pallet data is read in by a reader, displayed and checked by the forklift driver. After delivery to the Accumulation roller conveyor, the pallet is registered in the control for the automatic irradiation process. The pallet can no longer be reset or removed without causing a malfunction in the process.
  • the pallets are taken over by the pallet converter at the last station of the second conveyor line and transported to the transfer station with pallet changing station 23.
  • a transport carriage 1 has been positioned here and pneumatically centered on the lower pin.
  • a mechanical chain drive has extended the lift door upwards.
  • the pallet converter moves to the position and pushes the pallet into the trolley 1.
  • the door closes, the centering releases the trolley 1 and the trolley is pushed onto the by the overhead conveyor moved to the next waiting position.
  • the pallet converter changes the pallet position according to the same scheme, with the last roller conveyor of the conveyor line being used as an intermediate buffer.
  • Transport trolleys 1 are transported by a power-and-free system.
  • the power-and-free system consists of two rails arranged one above the other.
  • the power chain runs continuously in the upper rail and pulls the free carriages running in the lower rail on which the transport carriages 1 hang.
  • the trolley 1 can be driven by the driving power chain uncouple or reconnect. The system thus enables a discontinuous material flow.
  • Uncoupling and latching is implemented using stoppers, which are attached as required.
  • the throughput of the trolleys 1 is controlled by the control according to a predetermined program.
  • each transport carriage 1 is rotated once through 180 ° with each revolution. This takes place on the one hand by the inner rotating device 17, which in the present exemplary embodiment is arranged on the axis 19 of the surface source 20 in the irradiation room 24, and on the other hand by the outer rotating device 18 arranged in the entrance area to the irradiation room 24.
  • the transport carriages 1 are each three times passed on each long side of the surface source 20.
  • the pallet changing station 23 is provided, at which, for example, the upper and lower pallets are exchanged after each revolution.
  • the pallet changing station 23 is spatially closely connected to the product feed 25 and the product discharge 26.
  • the pallet changing station 23 also implements the functions of loading previously unloaded transport wagons 1 and unloading and, if appropriate Reloading.
  • the radiation chamber 24 is enclosed by a radiation shield 27.
  • FIG. 6 shows a circulation variant of the transport carriage 1 around radiation sources, which are arranged in two spatially separated surface sources 20a and 20b.
  • the pallets in the transport vehicle 1 are first transported along the outer side 21b of the surface source 20b, then between the opposite inner sides 22a and 22b of the surface sources 20a and 20b and finally along the outer side 21a of the surface source 20a.
  • Rotating devices are not necessary in this variant, which results in a simplified product transport device.
  • the source basket 29 is a sectional steel structure made of stainless steel.
  • Source frames 28 for receiving the radiation sources are arranged in the source basket 29.
  • the radiation sources can be inserted directly or in cassettes in the source frame.
  • the cassettes or sources are mechanically secured in the source frame 28.
  • the locking / unlocking of the security, the handling of the cassettes / sources and the loading / unloading of the source frame 28 takes place in the safe end position of the source basket 29 in the water basin by suitable manipulators from above.
  • the source basket 29 is monitored by separate signals on each side.
  • the source basket 29 is raised or lowered by a hydraulic cylinder with a stainless steel lifting rope on rope guides.
  • the arrangement of the radiation sources in the source frame 28 is carried out according to a previously calculated, optimized scheme.
  • a shaft 30 is constructed as a sheet metal structure, which reliably prevents contact between the radiation sources and the material to be irradiated. At the front, the shaft 30 is closed with one suction channel 31 each.
  • the material to be irradiated is accommodated in closed trolleys 1.
  • the transport vehicle door can only be opened for loading and unloading outside of the radiation room by pulling upwards.
  • a contact of the radiation material with the source frame 28 is therefore not possible.
  • the transport carriages 1 are transported on a conveyor track 32 with a power and free conveyor.
  • the carriages 1 run in a floor guide on the ground.
  • This safety system prevents direct contact between the material to be irradiated and radiation sources.
  • the upper layer of the source basket 29 is outside the
  • the radiation can be deactivated or interrupted at any time by hand. In the event of a malfunction in the technological system, the lowering of the source basket 29 and the suspension of the overhead conveyor take place automatically.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Chemical & Material Sciences (AREA)
  • Food Science & Technology (AREA)
  • Polymers & Plastics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Conveyors (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

L'invention concerne un système d'entraînement et de commande, un système de mise en circulation de palettes et un système de sécurité, ainsi qu'un système d'entraînement et de commande pour des dispositifs d'irradiation de produits, dans lesquels les produits à irradier sont transportés par un système convoyeur pour passer devant des sources de rayonnement disposées dans une chambre d'irradiation. L'invention s'applique notamment à l'irradiation des produits les plus divers avec un rayonnement gamma de haute énergie, par exemple des articles médicaux, des matériaux d'emballage et des matières synthétiques. Selon l'invention, le système d'entraînement et de commande est caractérisé en ce que l'entraînement des chariots de transport s'effectue par l'intermédiaire d'une chaîne se déplaçant dans un rail supérieur de transmission de puissance et par l'intermédiaire des chariots de roulement se déplaçant dans un rail inférieur libre. Le système de mise en circulation de palettes est caractérisé en ce que les palettes sont disposées dans des chariots de transport et en ce que lors de leur mise en circulation, les chariots de transport sont mis en marche, ou bien en ce que les sources de rayonnement sont disposées dans au moins deux sources planes séparées dans l'espace et en ce que les palettes sont transportées de manière définie dans des chariots de transport. Le système de sécurité est caractérisé en ce que les sources de rayonnement sont positionnées dans des châssis entourés d'une cage autour de laquelle est réalisé un puits fermé et en ce que les chariots de transport présentent de tous côtés des faces fermées.
PCT/EP1997/006604 1996-11-27 1997-11-26 Systeme de fonctionnement pour dispositifs d'irradiation de produits Ceased WO1998024694A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU55567/98A AU5556798A (en) 1996-11-27 1997-11-26 Operating system for product irradiation installations

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE19650842A DE19650842A1 (de) 1996-11-27 1996-11-27 Palettendurchlaufsystem für Produktbestrahlungsanlagen
DE19650845.2 1996-11-27
DE1996150845 DE19650845A1 (de) 1996-11-27 1996-11-27 Sicherheitssystem für Produktbestrahlungsanlagen
DE1996150843 DE19650843C2 (de) 1996-11-27 1996-11-27 Antriebs- und Steuerungssystem für Produktbestrahlungsanlagen
DE19650842.8 1996-11-27
DE19650843.6 1996-11-27

Publications (2)

Publication Number Publication Date
WO1998024694A2 true WO1998024694A2 (fr) 1998-06-11
WO1998024694A3 WO1998024694A3 (fr) 1998-11-05

Family

ID=27216901

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1997/006604 Ceased WO1998024694A2 (fr) 1996-11-27 1997-11-26 Systeme de fonctionnement pour dispositifs d'irradiation de produits

Country Status (2)

Country Link
AU (1) AU5556798A (fr)
WO (1) WO1998024694A2 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3605627A (en) * 1969-07-23 1971-09-20 Fmc Corp Escort memory for trollery conveyor
GB1315991A (en) * 1970-05-22 1973-05-09 King Ltd Geo W Power and free conveyors
US3834315A (en) * 1971-04-13 1974-09-10 W & H Conveyor Syst Inc Pneumatic control system for a trolley dispatch network
US4481652A (en) * 1981-01-19 1984-11-06 Neutron Products Inc. Irradiation device
DE8807283U1 (de) * 1988-06-03 1989-10-05 Veit Transpo GmbH, 8910 Landsberg Transportmittel
US5396074A (en) * 1993-03-19 1995-03-07 The Titan Corporation Irradiation system utilizing conveyor-transported article carriers

Also Published As

Publication number Publication date
AU5556798A (en) 1998-06-29
WO1998024694A3 (fr) 1998-11-05

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