CN104148315B - Nuclear power station blender clean dirt device - Google Patents

Abstract

The invention provides a cleaning and decontamination device for a mixer in a nuclear power plant, which includes a gantry support on which a lifting system and a flushing system are arranged. The lifting system includes two screw screws vertically arranged on the gantry bracket, and each screw screw is provided with a nut for use in conjunction with it. The surface is connected, and the support plate can move up and down along the two lead screws driven by the nut; the flushing system includes a flushing pipe assembly, and the flushing pipe assembly includes a flushing pipe, and the upper end of the flushing pipe is connected to the support through a flange. The lower end of the flushing pipe is provided with a rotatable nozzle assembly, and the flushing pipe can move up and down with the support plate. The decontamination device provided by the present invention realizes the real-time cleaning of the mixer barrel and the stirring paddle through remote control, and quickly and effectively removes the residual materials on the mixer barrel and the stirring paddle; the time is short and the effect is remarkable.

Description

Nuclear power plant mixer cleaning and decontamination device

technical field

The invention belongs to the technical field of cleaning, and in particular relates to a cleaning and decontamination device for a nuclear power plant. The decontamination device realizes real-time cleaning of a mixer barrel and stirring paddles in the barrel through remote control.

Background technique

At present, most of the radioactive concentrates and waste resins produced in domestic nuclear power plants and nuclear fields are solidified with cement. In the mixer, the stirring paddle installed at the bottom of the bucket is used to rotate the materials quickly and evenly to form cement solidification for permanent treatment. disposal. After the mixing and feeding are completed, a large amount of material will adhere to the mixer barrel and the stirring paddle, which will affect the next stirring. It is necessary to clean the materials remaining on the barrel and the stirring paddle. Because the stirred material is radioactive, it cannot be cleaned at close range. This device can be used for remote control to clean the barrel and stirring paddles. The time is short and the effect is remarkable. At present, there is no public report of this kind of cleaning and decontamination device.

Contents of the invention

Aiming at the defects existing in the prior art, the present invention provides a nuclear power plant mixer cleaning and decontamination device, the device realizes the cleaning of the mixer barrel and the agitator in the barrel through remote control, and solves the problem of There is a problem that radioactive materials cannot be cleaned in close quarters.

In order to achieve the above object, the technical solution adopted by the present invention is: provide a nuclear power plant mixer cleaning and decontamination device, the decontamination device includes a gantry support, and the gantry support is provided with a lifting system and a flushing system; the lifting system includes Two lead screws vertically arranged on the gantry bracket, each of the lead screws is provided with a nut used in conjunction, the lifting system also includes a support plate, the support plate passes through the two lead screws and connects with the two The lower surfaces of the nuts are connected, and the support plate can move up and down along the two lead screws driven by the nuts; the flushing system includes a flushing pipe assembly, and the flushing pipe assembly includes a flushing pipe, and the upper end of the flushing pipe The flange is connected to the support plate, the lower end of the flushing pipe is provided with a rotatable nozzle assembly, and the flushing pipe can move up and down with the support plate.

Further, the flushing pipe assembly also includes a sleeve arranged outside the flushing pipe, the upper end of the sleeve is connected to a drive mechanism capable of driving the sleeve to rotate, and the drive mechanism is fixed on the support plate , the lower end of the sleeve is connected with the spray head assembly, so as to drive the spray head assembly to rotate.

Further, the driving mechanism includes a gear pair and a motor driving the gear pair to rotate.

Further, the spray head assembly is connected to the flushing pipe through a rotary joint.

Further, the gantry bracket is provided with an upper limit switch and a lower limit switch that limit the operating range of the support plate.

Further, a switch baffle is provided on the lower surface of the support plate, and the switch baffle cooperates with the upper limit switch and the lower limit switch to limit the operating range of the support plate.

Further, the gantry bracket is provided with a guide sleeve assembly that guides the flushing pipe assembly.

Further, the gantry support is provided with a screw jack that drives two lead screws to rotate.

Further, the lower end of the gantry bracket is provided with a fixing device, and the fixing device fixes the entire cleaning and decontamination device on the barrel of the mixer.

Further, the cleaning and decontamination device is controlled by a remote control system.

The beneficial technical effects of the present invention are: the present invention provides a cleaning and decontamination device for a nuclear power plant mixer. By providing a lifting system and a flushing system on the gantry, the lifting system and the flushing system are used in conjunction to quickly and effectively remove the mixed The residual material on the mixer barrel and stirring paddle; the time is short and the effect is remarkable; the cleaning and decontamination device can also realize remote control, which solves the problem that the mixer barrel cannot be cleaned at close range due to residual radioactive materials.

Description of drawings

Fig. 1 is the front view of the nuclear power plant mixer cleaning and decontamination device of the present invention;

Fig. 2 is a side sectional view of Fig. 1;

Fig. 3 is a top view of the nuclear power plant mixer cleaning and decontamination device of the present invention.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1-3, it is a nuclear power plant mixer cleaning and decontamination device provided by the present invention. The device includes a gantry support 3, and two sets of systems are arranged on the gantry support 3, namely a lifting system and a flushing system. Wherein, the lifting system comprises vertically setting two lead screws 5 on the gantry support 3, and the two lead screws are driven and rotated by the screw elevator 2 arranged on the gantry support 3, and each lead screw 5 is provided with a nut 4 for cooperating use. The lifting system also includes a support plate 6, the support plate 6 passes through the two lead screws 5 and is connected with the lower surfaces of the two nuts 4, the support plate 6 can move up and down along the two lead screws driven by the nut 4 .

The flushing system includes a flushing pipe assembly 7 , and the flushing pipe assembly 7 includes a casing 16 and a flushing pipe 17 disposed in the casing 16 . The upper end of the sleeve 16 is connected to a driving mechanism capable of driving the sleeve to rotate, and the driving mechanism is fixed on the support plate 6 , and the lower end of the sleeve 16 is connected to the spray head assembly 20 to drive the spray head assembly 20 to rotate. Wherein, the drive mechanism includes gear pairs 15, 21 and a high-pressure washing motor 1, one gear 15 in the gear pair is connected to the casing 16 by bolts, and the other gear 21 in the gear pair is connected to the output shaft of the high-pressure washing motor 1. The upper end of the flushing pipe 17 is provided with a water inlet 13, and the upper end of the flushing pipe 17 is connected with the support plate 6 through a flange, and the lower end of the flushing pipe 17 is connected with the nozzle assembly 20 through a rotary joint 19, and the flushing pipe 17 can move up and down with the support plate 6; The upper end of the pipe 17 is provided with a water inlet 13, and the water inlet 13 is connected with the water supply system. Bearings 14 , 18 are provided between the bushing 16 and the flushing pipe 17 in order to fix the flushing pipe 17 .

When the high-pressure flushing motor 1 starts, the electric output shaft drives the gear 21 to rotate, and the rotation of the gear 21 drives the gear 15 meshed with it to rotate, thereby driving the sleeve 16 to rotate between the bearing 14 and the bearing 18. The swivel joint 19 keeps the flushing pipe 17 fixed and does not rotate. The high-pressure flushing water enters the interior of the flushing pipe through the water inlet 13 at the upper end of the flushing pipe, and enters the nozzle assembly 20 at the lower end through the flushing pipe 17. The nozzle assembly 20 rotates to clean the inside of the mixer. Sewage.

In order to limit the stroke of the support plate 6, a switch baffle 10 is provided on the lower surface of the support plate 6, and an upper limit switch 9 and a lower limit switch 11 are arranged on the gantry bracket 3, and the switch baffle 10 passes through the upper limit switch 9 and the lower limit switch. The position switch 11 cooperates to limit the operating range of the support plate 6 .

The gantry support 3 is provided with a guide sleeve assembly 8, the guide sleeve assembly 8 is fixed on the gantry support 3, and the guide sleeve assembly 8 plays a guiding role when the flushing pipe assembly 7 runs downward.

The lower end of the gantry support 3 is provided with a fixing device 12, which is connected with the mixer barrel, thereby fixing the whole device on the mixer barrel.

In order to avoid the radiation of residual materials, the cleaning and decontamination device is controlled by a remote control system.

The working process of the above-mentioned cleaning and decontamination device is as follows:

Firstly, the whole device is fixed to the barrel of the mixer through the fixing device 12, and then the high-pressure flushing motor 1 is fixed on the gantry support 3. After the mixing of the mixer is completed and the material is discharged through the discharge port, close the valve of the discharge port of the mixer, start the stirring motor of the mixer, and make the stirring paddle rotate counterclockwise in the mixer. Simultaneously start the high-pressure flushing motor 1, and now the flushing pipe assembly 7 starts at the upper limit position, and the nozzle assembly 20 rotates to complete the flushing of the mixer barrel and the stirring paddle. After 5s, the screw jack 2 is started, and the screw jack 2 drives the support plate 6 through the nut 4 and the lead screw 5 to drive the flushing pipe assembly 7 down. When the screw jack 2 moves, the guide sleeve assembly 8 installed on the flushing pipe assembly 7 provides guidance and fixation. After the flushing pipe assembly 7 descends for 1 second, it stays at this position for flushing for 5 seconds, and then continues to descend until the switch baffle plate 10 touches the limit switch 11 at the lower limit position, and stops descending. The flushing pipe assembly 7 reaches the lower limit position and stays at this The position utilizes and spray head assembly 20 to flush the barrel body and the stirring paddle of the mixer, and the stirring motor speed of the mixer increases from 0 to 80 rpm during the entire descent process. After flushing at the lower limit position for about 20 seconds, start the screw elevator 2 to drive the support plate 6 to drive the flushing pipe assembly 7 to rise. When the switch baffle 10 touches the upper limit position limit switch 9, the flushing pipe assembly 7 reaches the upper limit position. Turn off the high-pressure flushing motor 1, reduce the speed of the stirring motor of the mixer to 30rpm, open the valve of the feed port of the mixer, and discharge the flushing liquid.

Turn on the high-pressure flushing motor 1 again. At this time, the valve of the discharge port is opened. Repeat the above steps to lower the flushing pipe assembly 7 from the upper limit position to the lower limit position. Rinse at the lower limit position for 20 seconds and then rise to the upper limit position. At this time, increase the mixing When the speed of the stirring motor of the mixer reaches 240rpm, first turn off the high-pressure flushing motor 1, and then turn off the stirring motor of the mixer barrel, so that the stirring paddle stops rotating. Cleaning and decontamination of barrel and stirring paddle.

The cleaning and decontamination device of the present invention is not limited to the above-mentioned specific implementation manners, and those skilled in the art can obtain other implementation manners according to the technical solutions of the present invention, which also belong to the technical innovation scope of the present invention.

Claims (9)

1. Nuclear power plant mixer cleaning and decontamination device, the decontamination device includes a gantry support (3), which is characterized in that: the gantry support (3) is provided with a lifting system and a flushing system; the lifting system includes a vertically arranged Two lead screws (5) on the gantry support (3), each of the lead screws (5) is provided with a nut (4) for use in conjunction, the lifting system also includes a support plate (6), the support The plate (6) passes through the two lead screws (5) and is connected with the lower surfaces of the two nuts (4), and the support plate (6) can move along the two lead screws under the drive of the nuts (4). (5) move up and down; the flushing system includes a flushing pipe assembly (7), and the flushing pipe assembly (7) includes a flushing pipe (17), and the upper end of the flushing pipe (17) is connected to the support plate ( 6) connection, the lower end of the flushing pipe (17) is provided with a rotatable nozzle assembly (20), and the flushing pipe (17) can move up and down with the support plate (6); the flushing pipe assembly (7) also includes A sleeve (16) arranged outside the flushing pipe (17), the upper end of the sleeve (16) is connected to a drive mechanism that drives the sleeve (16) to rotate, and the drive mechanism is fixed on the support plate (6), the lower end of the sleeve (16) is connected to the spray head assembly (20), thereby driving the spray head assembly (20) to rotate. 2. The nuclear power plant mixer cleaning and decontamination device according to claim 1, characterized in that: the drive mechanism includes a gear pair and a motor (1) that drives the gear pair to rotate. 3. The nuclear power plant mixer cleaning and decontamination device according to claim 2, characterized in that: the spray head assembly (20) is connected to the flushing pipe (17) through a rotary joint (19). 4. The nuclear power plant mixer cleaning and decontamination device according to claim 3, characterized in that: the gantry support (3) is provided with an upper limit switch (9) and a lower limit switch (9) that limit the operating range of the support plate (6). bit switch (11). 5. The nuclear power plant mixer cleaning and decontamination device as claimed in claim 4, characterized in that: the lower surface of the support plate (6) is provided with a switch baffle (10), and the switch baffle (10) is in contact with the The upper limit switch (9) cooperates with the lower limit switch (11) to limit the operating range of the support plate (6). 6. The cleaning and decontamination device for mixers in nuclear power plants according to claim 5, characterized in that: the gantry support (3) is provided with a guide sleeve assembly (8) that guides the flushing pipe assembly (7). 7. The nuclear power plant mixer cleaning and decontamination device according to any one of claims 1-6, characterized in that: the gantry support (3) is provided with a screw elevator (2) that drives two lead screws (5) to rotate ). 8. The nuclear power plant mixer cleaning and decontamination device according to claim 7, characterized in that: the lower end of the gantry support (3) is provided with a fixing device (12), and the fixing device (12) cleans and decontaminates the whole The device is fixed on the barrel of the mixer. 9. The nuclear power plant mixer cleaning and decontamination device according to claim 8, characterized in that: the cleaning and decontamination device is controlled by a remote control system.