Sediment washout and decontamination device

FIELD: decontamination engineering.

SUBSTANCE: proposed device has side pipe connection, working liquid feed chamber, drive shaft, and washing head with nozzle. Working liquid feed chamber that has drive shaft and washing head pipe union, both passed therein through packing assemblies, is mounted directly inside storage tank by means of pipeline joined with side pipe connection. Drive shaft is coupled through movable bearing assembly with nozzle tilt angle varying mechanism. It is also coupled through slotted joint, toothed gear, and toothed rack with nozzle turning mechanism mounted on washing head axle and through hinged link ,to external adjustable ring of bearing disposed on packing assembly.

EFFECT: enhanced reliability and safety in operation.

3 cl, 3 dwg

 

The invention relates to the nuclear industry in terms of processing radioactive waste, namely, devices for jet erosion of sediment that has accumulated in containers storage of radioactive waste high level of activity. The invention can serve for the decontamination of the internal surfaces of the vessel and for the translation of this sediment in suspension to further its extraction for processing.

The famous design of the washing device for washing the precipitate and decontamination of containers of radioactive waste, comprising a housing with inlet fitting decontamination solution chamber for supplying liquid to scour sediment and device orientation of the nozzle (see Author's certificate No. 1387731, CL G 21 F 9/34, 1986).

The disadvantages described above of the known device is that this device when working in the mode of erosion of sediment at the bottom of the tank, and in the mode of deactivation can only produce uniform processing streams across the surface. Because the storage tanks are mostly underground tanks with a diameter of from 12 to 35 meters, then, of course, there is a need to scour sediment and decontamination of individual capacity that the specified device cannot be performed. The design orientation of the nozzle DOS does not provide the enough degree of reliability, since when washing the spray liquid from the insoluble solid phase (sand) can lead to jamming of the gear.

The closest device to the same destination to the claimed invention by the combination of features of a device (see application No. 2002101861 A, G 21 F 9/00, publ. 10.08.2003).

Device for washing the precipitate and decontamination includes a housing, a camera, Polaroid, drive rotation, the bearing support, the top and bottom of the washing head with nozzles, through which the discharge pipe is connected with a chamber for working fluid, provided with a filling valve. The device also has placed inside of the bearing support by the distributor, drive shaft, valve and piping, compressed air and water. On the lower section of the drive shaft that is installed movably through the seal at the top of the injection pipe, mounted on the axis of the upper washer head with nozzle to the housing which is pivotally attached rod. The lower end of the fixed thrust bearing mounted on the upper discharge pipe. Top drive shaft is fixed in the movable bearing unit, attached to the actuator with a reciprocating rod, and a node is installed on the spline connection inside toothed wheel which engages with the gear drive rotation.

With the help of open the specified device is not effectively removes residue from surfaces. In addition, there is a large amount of liquid radioactive waste.

Object of the invention is the reduction of the working fluid and, consequently, reduction of volumes of liquid radioactive waste and increasing the degree of radiation safety.

The technical result, which can be obtained by carrying out the invention, consists in extending the functionality of the proposed device, in improving the efficiency, reliability and safety of its operation.

This technical result is achieved in that the device for erosion of sediment and decontamination, including side socket, the camera working fluid, drive shaft washer head with a nozzle, a feature is that using a pipeline connected to the lateral pipe, the camera working fluid, including installed through the seal assemblies drive shaft and fitting washer head, placed between a coaxial and connected through edges, mounted directly inside the storage tanks, and the drive shaft is connected through the movable bearing unit with a drive to change the angle of the nozzle and through the splined connection, gear the gear and the rack - driven rotation of the nozzle, which is installed on the axis of the washing head and are connected pivotally thrust with turning the outer ring of the bearing, posted on the site seal.

Given the particular conditions of operation, the device

first, it differs in that it includes a remote control system consisting of a personal computer, a microcontroller, modem connection and software;

secondly, the device is characterized in that the actuators are mechanisms with a reciprocating rod, equipped with positioners.

Placing the camera working fluid inside the tank and its connection with the lateral pipe nipple allows to reuse the solution in the washing of the precipitate, removing deposits from the walls and the primary decontamination, thereby reducing the volume of the working fluid and, as a consequence, the volume of liquid radioactive waste.

What drive shaft mounted in the chamber of the working fluid through the seal assemblies, coaxial is connected by edges with fitting washer head, the axis of which is mounted the nozzle, United articulated thrust with an outer bearing ring mounted on the lower unit seals the chamber, and that the drive shaft via the mobile node is connected to the actuator to change the angle of inclination of the nozzle and through the splined connection of the toothed gear and the rack - driven rotation of the nozzle - all this allows you to change the angle of the nozzle in the vertical plane and made TLAT rotation of the nozzle in a horizontal plane, that provides the direction of the jet of working fluid at any desired point on the capacity and increases the efficiency of the whole device.

A device management system including a personal computer, microcontroller, communication modems and software that enables remote management device, to produce the orientation of the nozzle in the desired direction and the movement in continuous or discrete mode that allows you to increase the level of radiation safety and the efficiency of the device due to the rational use of working fluid.

Use as drive mechanisms with a reciprocating rod, equipped with positioners, allows to obtain a high accuracy of the orientation of the nozzle in the tank and, consequently, to improve the efficiency of its work.

1 shows a device for washing the precipitate and decontamination placed in the container.

Figure 2 shows the connection area of the shaft and fitting.

Figure 3 shows a section a-a of the device.

The device includes a camera 1, the working fluid is connected by a pipe 2 with a side pipe 3. The camera 1 is installed coaxially with the upper 4 and lower 5 seal assemblies. Through the upper seal Assembly 4 in the chamber 1 is placed a shaft 6, and through the lower seal Assembly 5 - W is user 7 of the washing head 8.

The shaft 6 and the socket 7 are interconnected by ribs 9. On the axis 10 of the washing head 8 mounted nozzle 11, United articulated thrust 12 with a bearing outer ring 13 mounted on the lower unit seals 5.

The seal assemblies 4 and 5 are made of antifriction material and also serve as bearings for the shaft 6 and the nozzle 7.

The shaft 6 is suspended on a movable bearing unit 14, which is attached to the actuator 15 changing the angle of inclination of the nozzle 11, is equipped with a positioner 16. On the shaft 6 spline connection gear 17 which engages with a toothed rack 18, which is connected to the actuator 19, provided with a positioner 20 and serving to rotate the nozzle 11.

The unit is mounted on the mounting flange 21 mounted on the flange penetrations 22 in capacity-store 23.

The proposed device operates as follows.

The device is installed in a container-store 23, basing its mounting flange 21 on the flange penetrations 22. Side socket 3 connected as a pipeline of fresh working fluid, and a pump installed in the tank storage supplying working fluid.

Supplied through the lateral pipe 3, the working fluid through the pipe 2 into the chamber 1 of the working fluid, and then through the cavity between the ribs 9, soudanaise the shaft 6 and the nozzle 7, the working fluid is supplied into the washing head 8 and the nozzle 11.

The necessary change in the angle of inclination of the nozzle in the vertical plane is the positioner 16, through which sequentially sets the required amount of extension of the drive shaft 15, the shaft 6 and the fitting of the washing head 8. The nozzle 11 mounted on the shaft 10, when the vertical movement of the washing head 8 and under the influence of an articulated traction 12 carries out a rotation in the vertical plane.

The rotation of the nozzle 11 in a horizontal plane as follows. The positioner 20 is supplied with the necessary extension of the drive shaft 19 and connected with it a toothed rack 18 which engages with the gear 17, which via a splined connection rotates the shaft 6, is suspended in the movable bearing unit 14, to the desired angle around its axis.

As the shaft 6 is rigidly connected to the washing head 8, the latter also rotates around the axis together with the pivot thrust 12 and a bearing outer ring 13 mounted on the lower unit seals 5.

With the addition of the movements of the nozzle 11 from the actuators 15 and 19 it can be sent anywhere in the container.

As drives can be used with the mechanisms of the electric linear (IEP) or pneumatic actuators with positioners that allows you to adjust the speed of movement of the rods and productivity is ü they stop in a predetermined position. The drive control is performed remotely by a computer control system. An electrical signal from a personal computer is supplied to a programmable microcontroller, and then either electropneumatically engaged in the supply of compressed air to the pneumatic cylinder, or the relay is engaged in the supply voltage on the mechanisms of electric linear actuators. The computer control system allows not only to change the direction of the nozzle by the pointer of the mouse on the computer monitor, but also to carry out continuous or discrete moving on the program.

Thus, the device can be effectively used for erosion of sediment and disinfection of the surface of the radionuclides. When it is achieved by increasing the degree of radiation safety and formed a small quantity of liquid radioactive waste.

1. Device for washing the precipitate and decontamination containing side socket, the camera working fluid, drive shaft washer head with nozzle, characterized in that by means of the pipeline connected to the lateral pipe, the camera working fluid, including installed through the seal assemblies drive shaft and fitting washer head, placed between a coaxial and connected through edges, mounted directly is edstone inside of storage tanks, moreover, the drive shaft is connected through the movable bearing unit with a drive to change the angle of the nozzle and through the splined connection of the toothed gear and the rack - driven rotation of the nozzle, which is installed on the axis of the washing head and are connected pivotally thrust with a rotating outer ring, placed on the seal node.

2. The device according to claim 1, characterized in that it contains a control system including a personal computer, a microcontroller, modems, communications and software.

3. The device according to claim 1, characterized in that the drive use with a reciprocating rod, and their positioning.



 

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