RU2066488C1 - Apparatus for capsule with waste nuclear fuel transfer into container - Google Patents

Abstract

FIELD: apparatus is used in atomic industry, atomic power stations, radiochemical works, radioactive wastes storages etc. SUBSTANCE: apparatus has transportation tube designated for capsule transfer, loading cable of crane mechanism with fixed on it gripper to be engaged with capsule and also mechanism to hold capsule and prevent its dropping, that has blocks and flexible links connected with brakes activation, that is engaged with final switches of crane mechanism. Mechanism, that holds capsule and prevents its dropping has gripper engaged with sling tool mounted on capsule upper butt surface. EFFECT: improved design. 2 cl, 4 dwg

Description

 The present invention relates to nuclear technology and can be applied at nuclear power plants, radiochemical plants, radioactive waste storage facilities and other similar enterprises.

 A device is known for reloading a capsule with spent nuclear fuel, comprising a transport pipe for reloading a capsule, a cargo rope of a crane mechanism with a gripper fixed to it. In order to prevent the capsule from falling during the breakage of the cargo rope of the crane mechanism or during emergency opening of the gripper, the transport pipe is equipped with a movable support equipped with folding two-arm levers that overlap the central opening of the support and interacting with the capsule and walls of the transport pipe, the cylindrical surface of which becomes conical and the movable support flexible connections through a system of fixed and moving blocks, each of which is equipped with a spring, a drum equipped with a brake, and rotational balances are connected to the brake engagement mechanism, equipped with a spring, and the springs can interact with limit switches with increasing effort in flexible connections, and the mass of the balances is greater than the mass of the movable support (see AS N 1235387, MKI G 21 C 19/32) .

 The main disadvantage of the known device is that the ropes for the safe overload of the capsule are fixed to the movable support, on which the capsule rests through the folding arms, but the design of the movable support does not allow to accompany the capsule during its passage through the pointing device, as well as during movement in the transport container . All of the above leads to the fact that after reaching the conical part of the shaft (pipe), the levers of the movable support recline and pass the capsule down. The device for the safe refueling of the spent fuel capsule is terminated.

At nuclear plants with an RBMK reactor, the path that a capsule with spent nuclear fuel must go without holding it during loading into a transport container is up to 40%
The task of the invention is to increase the reliability of the device.

 This is achieved by the fact that the device for reloading the capsule with spent nuclear fuel contains a transport pipe intended for reloading the capsule, a cargo rope of a crane mechanism with a grip fixed to it, and a mechanism for holding the capsule from falling, the latter including a grip interacting with the capsule by means of a sling device, mounted on the end surface of the capsule, and through a system of flexible connections, connected to the brake engagement mechanism, interacting with the limit switches crane mechanism.

 The invention is illustrated in the drawing, where in FIG. 1 general view; FIG. 2 node A; FIG. 3 node B; FIG. 4 view "B".

 A device for loading capsules with spent nuclear fuel into a container comprises a shaft 1, in which capsule 3 is installed on special grips 2 for loading it with spent nuclear fuel, lifted from the transport container 4 by means of a crane 5 fixed to cargo ropes 6 and simultaneously fixed to the on-off device for sling 7, which is equipped with the upper end surface of the capsule 3.

 Also, a grip 8 of the mechanism for holding the capsule from falling 9 through the ropes 10 and blocks 11 is attached to the on-off device 7. The gripper 8 is attached to the sling device 7 by means of rotary levers 12.

 On the frame of the cargo truck of the bridge crane 13, movable units 14 are installed, equipped with springs 15, interacting with the cargo ropes 6 of the bridge crane, passing through the equalization block 16 of the cargo truck of the same crane. Limit switches 17 are also installed here to turn on the mechanism of holding the capsule from falling 9.

 For accurate installation of the capsule 3 in the container 4, a guidance device 18 is provided, and the mobility of the blocks 14 is carried out through hinges 19.

 The mechanism for holding the capsule 9 consists of a drum 20, a brake 21, an electric brake 22.

 The device operates as follows. An empty capsule 3 is lifted in the shaft (pipe) 1 from the container 4 by the sling device 7 by means of a gripper 5, fixed to the cargo rope 6 of the overhead crane, and mounted on grabs 2.

 Capture 5 is released and retracted. The capsule 3 is loaded with spent fuel. After loading the capsule 3 to the lower position of the sling device 7, set the gripper 8 and lock it with pivoting levers 21, and to the upper position of the sling device 7 set the claw 5.

 Then the capsule 3 is released from the pickups 2 and the bridge crane lowers it into the container 4 through the pointing device 18.

 After overloading the capsule 3 into the container 4, the grippers 8 and 5 are lifted into the central hall of the speaker.

 In the event of an emergency, the rope 6 broke or the gripper 5 was opened; the mechanism for holding the capsule from falling 9 is automatically turned on, which receives a signal for switching on from the limit switch 17 according to the following scheme: after loss of the load (capsule) in the ropes 6, the tension and moving blocks 14 under the action of the force of the springs 15 are deflected in the hinges 19, ensuring the operation of the limit switches 17. After the operation of the limit switches 17, the electric drive of the brake 22 engages the brake 21, which stops navlivaet rotation of the drum 20, stopping winding the rope 10, thereby holding mechanism 9 capsule 3 from falling.

 The use of the proposed device will allow to exclude accidents when the spent nuclear fuel (FA) is reloaded from the central hall of the nuclear power plant into the container when the cargo rope of the crane mechanism breaks or emergency opening of the gripper occurs.

Claims (2)

 1. A device for reloading a capsule with spent nuclear fuel, containing a transport pipe intended for reloading the capsule, a cargo rope of a crane mechanism with a grip fixed to it, interacting with the capsule, and also a mechanism for holding the capsule from falling, including blocks and flexible couplings connected to the brake engaging mechanism, interacting with the limit switches of the crane mechanism, characterized in that the mechanism for holding the capsule from falling includes a grip that interacts with the sling risposobleniem mounted on the upper end surface of the capsule.  2. The device according to claim 1, characterized in that the capture of the cargo rope is in interaction with a sling device.

Images