OA19022A

OA19022A - Conveying system for repositories

Info

Publication number: OA19022A
Application number: OA1201900033
Authority: OA
Inventors: Wolfgang Schubert; Carsten Frank; Michael Flender; Andreas Koch
Original assignee: Siemag Tecberg Gmbh
Priority date: 2016-12-02
Filing date: 2017-11-29
Publication date: 2019-11-22

Abstract

The aim of the invention is to transport heavy loads in repositories for nuclear and/ or nonnuclear waste. Tins aim is achieved in that cable deflection pulleys are mounted on at least one conveying element, which cable deflection pulleys distribute the suspended load to two or more cable strands in each run in accordance with the block-and-tackle principle, one end of which cable strands is fixedly mounted above the travel path or on the conveying means. Clamping and lifting devices make it possible to secure the suspended load, e.g. in the event of a collision, while the overtravel-securing overtravel-braking device can lessen the effects ot overtravel beyond the travel path end points.

Description

Title:____________Conveying System for repositories

[0001] The présent invention relates to a conveyor system for repositories having vertical or inclined shafts, as described by the preamble of the independent claim 1

[0002] The final deposit of toxic or radioactive waste represents a problem, which results not only in connection with the shutdown of nuclear plants, but in particular also in connection with the ongoing operation or the putting into operation of nuclear plants.

[0003] The final deposit of toxic and in particular also radioactive waste usually provides for a delivery of the waste containers capable of final deposit to the final deposit facility via a rail and/or road connection, which can also connect the final deposit facility with a conditioning plant. In this plant, for example, fuel rods of irradiated fuel éléments or the waste from a reprocessing would be conditioned so as to be capable of final deposit.

[0004] The transfer area of a final deposit facility in which waste containers are removed from the delivery vehicles is in most cases divided into areas for the reloading of heatgenerating and negligibly heat-generating waste. For the two areas, also separate crâne Systems and buffer halls are available in most cases.

[0005] The normal case in deposit is that waste containers are supplied immediately for final deposit after a réception inspection. For this purpose, the waste containers can be placed onto rail-bound platform wagons, for example, which are moved by means of an under-floor conveyor system. The platform wagon reaches the area of the shaft conveyor system by latéral displacement.

[0006] Known final deposit concepts provide that the pit building of the final deposit facility is made accessible via several, preferably two shafts. The deposit level adjoins the two shafts below the ground. (\.

-2[0007] Usually, the staff transports and material transports take place via the first shaft. The waste containers are conveyed to below ground via the second shaft. In addition, fresh air can be drawn into the pit building via the second shaft. The shaft conveyor Systems used are mostly tower conveyor Systems, such as disclosed purely by way of example from DE 10 2004 058 757.4, the content of which is to be part of this disclosure by reference.

[0008] As a conséquence of constantly increasing demands, in particular with respect to the safety of, for example, (final) disposai sites for radioactive waste, for example in underground final disposai sites, alternative concepts for conveyor Systems are required which are capable to meet these demands in connection with the conveyance and the deposit of transport units to below ground.

[0009] Thus, in contrast to conventional conveyor Systems for mining, the payloads which often occur in the conveyance of transport units in the final deposit field amount to several dekatonnes, as expérience has shown.

[0010] Moreover, the conveyance of transport units for final deposit usually takes place at very low conveying speeds in comparison to conventional shaft conveyor Systems.

[0011] Further, the conveyance of transport units in the final deposit field usually takes place infrequently in comparison to conventional shaft conveyor Systems, which has a large and usually positive influence on the number of stress cycles and thus on the durabiiity of the individual components.

[0012] The object of the présent invention is to meet these demands on a conveyor

System for final deposit facilities and to make available a System which meets these requirements in a manner that is as simple, low-maintenance and efficient as possible.

[0013] This object is achieved by a conveyor system having the features of the independent patent claim l, wherein suitable embodiments are described by the features of the dépendent claims C<

-JT

[0014] What is provided is a conveyor System for final deposit facilities in the nuclear and/or non-nuclear application case, for conveying heavy loads in a vertical or inclined shaft, comprising at least one conveyor machine in a tower or floor installation, at least one conveying means which runs up and down in the shaft, and at least one upper cable, which is moved by the conveyor machine and on which the at least one conveying means is suspended, wherein the at least one upper cable has at least one end which is remote from the conveyor machine and is fixated by means of a cable end fastener above the travel path or on the conveying means, and the conveying means is hung up in the shaft in the upper cable by means of at least one deflecting pulley according to the block and tackle principle.

[0015] Through the use of deflecting sheaves which are threaded into the installation, mounted to or preferably on the conveying means, the suspended load is divided respectively to two or more cable strands per installation. Thus, at approximately the same nominal cable safety, a smaller nominal cable diameter is obtained.

[0016] Depending on the nominal cable diameter, the cable running diameter of the cable carrier of a conveyor machine can also be selected to be smaller, since the latter is always configured as a multiple of the nominal cable diameter.

[0017] Smaller cable carriers hâve a direct influence on the moved masses of the overall System, i.e. these are reduced, and bring about both a more favorable energy balance and also cost balance. The latter applies both to the production phase and to the operation phase.

[0018] The conveyor System can thus be arranged in such a manner that the conveyor machine is a Koepe conveyor machine, in which the at least one upper cable is moved according to the friction principle, or otherwise a drum conveyor, onto which the at least one upper cable is wound.

[0019] The conveyor System preferably can hâve a first, driven cable drum and a second loose drum, via which the at least one upper cable is guided in order to increase the driving capacity of the System.

-4[0020] The conveyor system can also be equipped with a damping and lifting apparatus for the upper cable according to the invention. For the case of an accident within the conveying concept and optionally for supporting the cable handling, for example fitting and removing the cables, the damping and lifting apparatus serves as a redundantly usable backup system, which, usable in any installation, is capable of moving the suspended loads safely up or down.

[0021] Further, the conveyor system can be equipped with overtravel safety and/or overtravel braking devices.

[0022] The conveyor system can also be equipped with conveying means catching apparatus, in order to prevent the conveying means from falling in the event of a cable breakage.

[0023] Further, and due to the usually required redundant configuration of the conveyance, the conveyor system is preferably a multi-cable conveyor system, wherein several deflecting pulleys can be provided one after the other in the respective cable strand, and wherein preferably one deflecting pulley on the conveying means deflects at least one cable in each case.

[0024] The respective deflecting pulley, as used in the conveyor system according to the invention, is preferably mounted so as to rotate individually on a central axis. Alternatively, the respective deflecting pulley can also be firmly mounted on a rotating shaft. More preferably, the respective deflecting pulley can be equipped with a cable groove liner. The respective deflecting pulley can likewise preferably be mounted in a distance-adjustabie manner with respect to its mounting location in order to permit cable length compensation.

[0025] Finally, the conveyor System, due to the increased safety requirements in the final deposit field, can be equipped with a device for determining the cable loads, wherein

-5the cable load data are transmitted to this device preferably in a wireless manner directly or via repeaters to a control stand of the conveyor System.

[0026] Other features and advantages of the invention can be taken from the following, purely illustrative and in no way limiting description of various embodiments of the invention with reference to the attached drawings or sketches. In particular, the features of the various embodiments can also be mutually combined. In the attached drawings there is shown respectively:

[0027] Fig. I a schematic représentation of an embodiment of the invention with a Koepe conveyor machine.

[0028] Fig. 2 a schematic représentation of an embodiment of the invention with a Blair drum conveyor machine.

[0029] Fig. 3 in principle, the possibility of increasing the driving capacity by the use of a further cable drum (arrangement preferably below the conveyor drum).

[0030] Figure l shows the described alternative conveying concept by way of example where a multi-cable Koepe conveyor machine l is used in a tower installation. The upper cables 5 and/or 6 are guided through or past the ciamping and lifting apparatus 2 via the respective deflecting sheaves 7 and 9 of the two conveying means 8 and 10 and are fixated to the base in the respective cable end fasteners 3 and 4. In this case, it is also conceivable to thread in further deflecting pulleys, as well as to fasten the cable end on the conveying means. The two conveying means are connected by the lower cables 11, which simultaneously serve as weight compensation.

[0031] Fig. 2 shows the described alternative conveying concept by way of example where a 2-cable Blair drum conveyor machine 21 is used in a tower installation. The upper cables 26 are guided through or past the ciamping and lifting apparatus 22 via the deflecting sheaves 27 of the conveying means 28 and are fixated to the base in the cable end fasteners 23. In this case, it is also conceivable to thread in further deflecting pulleys, as well as to fasten the cable end on the conveying means. χ

-6[0032] Fig. 3 shows a detail of a development stage of the system described in

Figure l. As a resuit of the use of a further cable drum 20, the angle of deflection on the cable carrier of the conveyor machine is enlarged (doubled in the case represented). X

Claims

Claims

1. A conveyor system for final deposit facilities in the nuclear and/or non-nuclear application case for conveying heavy loads in a vertical or inclined shaft, comprising at least one conveyor machine in a tower or floor installation, at least one conveying means which runs up and down in the shaft, and at least one upper cable which is moved by the conveyor machine and on which the at least one conveying means is suspended, characterized in that the at least one upper cable has at least one end which is remote fforn the conveyor machine and is fixated by means of a cable end fastener above the travel path or on the conveying means, and the conveying means is hung up in the shaft in the upper cable by means of at least one deflecting pulley according to the block and tackle principle.
2. The conveyor System according to claim 1, characterized in that the conveyor machine is a Koepe conveyor machine, wherein the at least one upper cable is moved according to the friction principle.
3. The conveyor system according to claim 1, characterized in that the conveyor machine is a drum conveyor machine, onto which the at least one cable is wound
4. The conveyor system according to claim 2, characterized in that in the conveyor machine a first, driven cable drum and a second loose drum is provided, via which the at least one upper cable is guided.
5. The conveyor system according to any of the preceding claims, characterized in that the conveyor system is equîpped with a clamping and lifting apparatus for the at least one upper cable.
6. The conveyor system according to any of the preceding claims, characterized in that the conveyor system is equîpped with overtravel safety apparatus. χ
7. The conveyor system according to any of the preceding daims, characterized in that the conveyor system is equipped with overtravel braking devices.
8. The conveyor system according to any of the preceding daims, characterized in that the conveyor system is equipped with conveying means catching apparatus.
9. The conveyor system according to any of the preceding daims, characterized in that the conveyor system is a multi-cable conveyor System.
10. The conveyor System according to any of the preceding daims, characterized in that several deflecting pulleys are provided one after the other in the respective cable strand.
11. The conveyor System according to any of the preceding daims, characterized in that the at least one deflecting pulley on the conveying means deflects at least one cable in each case.
12. The conveyor system according to any of the preceding daims, characterized in that the respective deflecting pulley is mounted so as to rotate individually on a central axis.
13. The conveyor system according to any of daims 1 to 11, characterized in that the respective deflecting pulley is firmiy mounted on a rotating shaft.
14, The conveyor system according to any of the preceding daims, characterized in that the respective deflecting pulley is equipped with a cable groove liner,
15. The conveyor system according to any of the preceding daims, characterized in that the respective deflecting pulley is mounted in a distance-adjustable manner with respect to its mounting location in order to permit cable length compensation.
16. The conveyor System according to any of the preceding daims, characterized in that devices are provided for determining the cable loads.