JPH08206618A - Tube inner-face cleaning and drying device - Google Patents

Abstract

PURPOSE: To provide a device of small and continuous diameter for carrying out the cleaning and drying of a tube inside simultaneously and efficiently by the automatic remote operation without extending pollution. CONSTITUTION: A device is composed of a flexible tube 7 connecting a cleaning and drying head consisting of an end drying nozzle 3 and a rotating cleaning brush 2, a tube wind-up drum 10, a roller 8 for moving the tube 7 up and down and a roller 11, and a suction mechanism (an adapter 4, a hose 5 and an exhaust device 13) for gas in a tube 1 is formed at the end of the tube 1 on the inserting side of the tube 7. Also a flexible shaft 14A transmitting the rotating force of a motor 17 is contained in the tube 7, and the cleaning and drying head with the nozzle 3 and the brush 2 installed thereon is connected with the above- said constitution, and gas for drying is supplied into the tube 7, and the cleaning and drying in the tube 1 are carried out simultaneously by rotating a brush rotating shaft. The time required for the cleaning and drying works in the continuous tube of small diameter can be shortened, and the improvement of environment, reduction of labor and the like can be realized by the arrangement.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe inner surface cleaning / drying device, and more particularly, to efficiently clean a small-diameter and long pipe inside a nuclear power generation facility, which is contaminated by radioactive substances, without polluting the atmospheric environment. A device suitable for drying.

[0002]

2. Description of the Related Art Conventionally, the inner surface of a small-diameter and long pipe is cleaned and
As a means for drying, a rotary brush for cleaning was attached to the tip of the shaft, this was inserted into the inner surface of the tube, and the inner surface of the tube was cleaned by manually moving the shaft and the cleaning brush. After that, a method of drying the inside of the pipe by sending a gas to the inside of the pipe for drying was adopted.

This method has a drawback in that there is no means for recovering the dust generated by cleaning the inside of the pipe contaminated with radioactive materials of the nuclear power generation facility, and the cleaning and drying are performed without contaminating the atmospheric environment. Is difficult, and cleaning and drying are divided into two steps,
There is also a drawback that the efficiency is poor because the work must be performed by manual operation.

[0004]

In the above-mentioned prior art, since there is no means for recovering the dust generated by cleaning the inside of the pipe, it is attempted to clean and dry the inside of the pipe contaminated with radioactive substances in a nuclear power plant or the like. In this case, dust containing radioactive substances generated at the time of cleaning might be scattered from the pipe end and spread the pollution.

Further, since the cleaning and drying devices are required separately, the work and the device are complicated, and the cleaning and drying work takes time. Furthermore, when cleaning and drying the inside of a large number of pipes in a tube group, two devices for cleaning and drying are installed in the work place, and the work is performed while replacing these two devices. Since a large work space is required, there is a problem that it is difficult to apply in a narrow space and work efficiency is poor.

Further, in the prior art, since the work must be carried out by manual operation, there is a problem that the longer the pipe, the heavier the burden on the worker and the longer it takes. In particular, as shown in FIG. 1, in the case of a vertical pipe body, the operator supports the self-weight of a portion to be inserted into the pipe, such as a cleaning brush and a shaft. There is also a problem that the cleaning brush can be inserted only in the range, and the cleaning range is limited.

An object of the present invention is to provide a device capable of simultaneously cleaning and drying the inside of a pipe by remote automatic operation while collecting dust during cleaning, and cleaning and drying the inside of a small-diameter and long pipe. It is an object of the present invention to provide a pipe inner surface cleaning / drying device which can be efficiently performed without spreading pollution.

[0008]

In order to achieve the above object, a pipe inner surface cleaning / drying device of the present invention is a device for cleaning the inside of a pipe having a small diameter and a long length and having an open end in at least one of the following: It is characterized in that a rotary brush for cleaning the inside of the tube and a nozzle for injecting a gas for drying the inside of the tube are provided at the tip of the tube to be inserted into the tube.

That is, specifically, a flexible tube is used as the tube, and a rotary brush for cleaning the inside of the tube and a nozzle for injecting gas for drying the inside of the tube are provided together at the tip of the tube, and the tube is dried. A flexible shaft for transmitting the rotational driving force to the rotary brush is included in the tube, and a drum for winding this tube and a feed for putting the tube in and out of the tube. A mechanism is provided, and a mechanism (adapter, hose, exhaust device) for sucking gas in the tube is provided at the tube end on the side where the tube is inserted, so that the tube can be cleaned and dried at the same time.

[0010]

According to the above construction, the tube for supplying the drying gas contains the flexible shaft for transmitting the rotational driving force connected to the rotary brush driving motor, and the drying gas is provided at the tip of these tubes. A cleaning / drying head equipped with a rotary brush and a nozzle for injecting the gas can be connected to the tube, and the rotary shaft can be rotated while feeding the drying gas into the tube for cleaning. Therefore, it becomes possible to perform cleaning and drying at the same time.

Further, the cleaning tube is sandwiched by a feed roller, and the roller is rotated by the driving force of the motor so that the tube can be moved by the frictional force between the roller and the tube, so that the cleaning tube can be automatically lengthened remotely. The inner surface of the pipe can be cleaned and dried.

Further, an adapter to which an exhaust hose is connected is installed at the end of the pipe into which the cleaning tube is inserted, and the exhaust hose is connected to an exhaust device to clean and dry the inside of the pipe while sucking gas in the pipe. By performing the above, it becomes possible to suck and collect dust and the like generated when cleaning the inside of the pipe.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an embodiment of a pipe inner surface cleaning / drying device of the present invention, FIG. 2 is a cross-sectional view showing details of a mechanism of a cleaning / drying head portion of the present embodiment, and FIG. 3 is winding in the present embodiment. FIG. 4 is a side view showing details of the mechanism of the apparatus, and FIG. 4 is a sectional view of FIG.

As shown in FIG. 1, this apparatus has a flexible tube 7 having a cleaning / drying head composed of a drying nozzle 3 and a rotary cleaning brush 2 at its tip, and a tube winding drum for winding the flexible tube 7. 10 and this drum shaft 5
2, a winding device including an upper feed roller 8 and a lower feed roller 11 for moving the flexible tube 7 up and down, and a frame 12 for fixing these.

The cleaning flexible shaft 1 connected to the cleaning motor 17 is attached to the drum shaft 52 of this winding device.
4A, a feed flexible shaft 9A connected to the feed motor 18, and a drying air tube 15 connected to a dry unit 16 for supplying dry air, and the cleaning flexible shaft 14A is a take-up drum. It is connected to the cleaning brush 2 through the inside of the drum shaft 52 of 10 and the inside of the flexible tube 7 connected to the winding drum 10. The flexible feeding shaft 9A branches into two flexible shafts 9B and 9C via a gear in a gear box 48 attached to the frame 12, and is connected to the upper feeding roller 8 and the lower feeding roller 11, respectively. There is.

In addition to this, there is an adapter 4 installed at the lower end of the pipe 1, an exhaust hose 5 drawn from this adapter 4, and an exhaust device 13 connected to the hose 5 via a filter 6 for cleaning. Motor 17, feed motor 1
8, the dry unit 16, and the exhaust device 13 are electrically connected to the control device 20 by a cable 19, respectively.

Next, the cleaning / drying head of this embodiment will be described with reference to FIG. The rotary cleaning brush 2 and the hollow tubular cleaning brush shaft 21 have a hole 27 through which drying air passes on the inner surface.
The drying nozzle 3 which is inserted above the drying head 26 provided with a screw and is attached to the upper end of the drying head 26 by screwing.
Fixed by.

The drying head 26 has the lower end of the coupling 3
1 and the female screws 29 and 30 are connected to the cleaning flexible shaft 14B. The drying head 26, the coupling 31, the flexible shaft 14B for cleaning, and the outer cylinder 32 including the bearings 25 and 28 for supporting these rotations are connected to the flexible tube 7.

Dry air for drying supplied from the dry unit 16 flows into the inner surface of the flexible tube 7 through the dry air tube 15, and the dry air is supplied to the inner surface of the flexible tube and the cleaning flexible shaft 1.
It passes through the gap of 4B as shown by arrow A and reaches the tip of the shaft. The tip of the flexible shaft 14B and the lower end of the drying head 26 are connected by a coupling 31, but there is a gap between them through which dry air passes,
The dry air passes through this gap as shown by arrow B and is guided to the air hole 27 in the dry head 26. Further, the dry air reaches the drying nozzle 3 through the air hole 27 and is jetted downward from the air outlet 22 as indicated by an arrow C.

On the other hand, the rotational driving force of the cleaning motor is transmitted through the flexible shaft 14B and the coupling head 31 to the drying head 26, and the drying head 2
6, the brush shaft 21 fixed by the sleeve 23 and the female screw 24 rotates.

In this way, the drying air is supplied to the drying nozzle 3
The inner surface of the pipe can be cleaned and dried at the same time by rotating the cleaning brush 2 while ejecting the air from the air outlet 22.

Further, as shown in FIG. 1, a tubular adapter 4 connected to an exhaust device 13 via an exhaust hose 5 and a filter 6 is attached to the lower end of the pipe to be cleaned, and suction is performed by the exhaust device. While cleaning and drying,
The dust generated by cleaning the inside of the pipe can be collected by the filter 6 and the exhaust device 13 without being scattered around.

In this embodiment, the air outlet 22
Is directed downward, the dry air is always jetted downward as shown by arrow C. Therefore, it is possible to perform cleaning while dropping dust and the like generated by cleaning downward from the drying nozzle 3 without being scattered, and it is possible to reliably collect dust in combination with the exhaust function. Is. Further, the cleaning brush 2 and the brush shaft 21
Can be easily replaced by removing the drying nozzle 3 at the upper end of the drying head 26.

An embodiment of the winding device shown in FIGS. 3 and 4 is shown. FIG. 3 is a view showing a side surface of the winding device, and FIG. 4 is a view showing a cross section of the winding device. Further, FIGS. 5 and 6 show an embodiment of the cleaning tube feeding mechanism installed in this winding device. 5 is a view showing a side surface of the cleaning tube feeding mechanism, and FIG. 6 is a view showing an arrow A of the cleaning tube feeding mechanism as seen from above.

The winding drum 10 and the drum shaft 52 are rotatably fixed to the frame 12 by a drum bearing 56. A cleaning flexible shaft 14A and a dry air tube 15 are connected to both ends of the drum shaft 52, respectively. The cleaning flexible shaft 14A is the drum shaft 5
2 reaches the portion A via the gear 54 and the shaft 57 provided inside the cleaning flexible shaft 14B at the portion A.
Is connected to the drying head 26 through the inside of the flexible tube 7, and the rotational driving force from the cleaning motor 17 is transmitted to the drying head 26. On the other hand, the drying air tube 15 is connected to the air pipe 53 through the drum shaft 52, reaches the portion A, and guides the drying air supplied from the dry unit 16 into the flexible tube 7.

The frame 12 is provided with a gear box 48 to which the flexible feeding shaft 9A is connected, and the flexible feeding shaft 9A is fed by the gears in the gear box 12 to the flexible feeding shaft 9B and the flexible feeding shaft 9B. The flexible shaft 9C is branched into two parts, an upper feed roller 8 and a lower feed roller 11, respectively.
Connected to.

The flexible tube 7 including the cleaning flexible shaft 14B is wound around the winding drum 10 with the portion A as the end, and the frame 12
The roller 49 and the spring 50 fixed to the winding roller 10 hold the roller 49 and the spring 50 so that the roller 49 and spring 40 do not protrude from the winding drum 10, and then sandwich the roller 49 between the upper feed roller 8 and the guide roller 41.

As shown in FIG. 5, the upper portion of the tube feed mechanism for cleaning has a speed reducer 35 connected to the feed flexible shaft 9B, gears 36 and 37, a drive pulley 42, a driven pulley 43, and these. V and the V-belt 45 wound around the outer periphery of the upper feed roller 8, the spring 46 for adjusting the pressing force of the upper feed roller 8, and the adjusting screw 4.
It is composed of four.

The rotational driving force of the feed motor 18 is supplied to the upper feed roller 8 via the flexible feed shaft 9B.
It is transmitted to the lower feed roller 11. Flexible tube 9B for feeding in the upper tube feeding mechanism part for cleaning
The rotational driving force is reduced by the speed reducer 35 and then transmitted to the gear 36 via the shaft 38. The gear 36 and the gear 37 mesh with each other, and the gear 37 rotates in the direction of arrow B, which is opposite to the rotation direction of the gear 36.

The rotations of these gears 36, 37 are transmitted to the drive pulley 42 via the shafts 38, 39, and the V feed belt 45 wound on the outside of the drive pulley 42 and the upper feed roller via the driven pulley 43. 8 is transmitted. The flexible tube 7 sandwiched between the upper feed roller 8 and the guide roller 41 is moved by the frictional force between the upper feed roller 8 and the upper feed roller 8 as shown by an arrow C in accordance with the forward / reverse rotation of the upper feed roller 8. Up and down. On the other hand, the lower feed roller 1
1 is in contact with the take-up drum 10, and the frictional force between them causes the take-up drum to rotate with the forward / reverse rotation of the lower feed roller 8.

In this way, the rotational driving force of the feed motor 18 is transmitted to the upper feed roller 8 and the lower feed roller 11, and the flexible tube 7 is automatically moved up and down by the rotation of these rollers and the winding associated therewith. It is possible to perform automatic rotation traveling of the taking drum 10.

In this embodiment, since the cleaning flexible tube is wound on the winding drum, the space occupied by the flexible tube can be small, so that the operation space below the pipe end to be cleaned is small. It can be applied in. Further, the length of the flexible shaft connecting the winding drum and the motor, the dry unit, and the length of the air tube can be extended or shortened according to the situation of the work place, so that remote automatic operation is possible.

Since the weight of the cleaning tube or the like inserted into the tube is supported by the winding drum and driven by the two rollers, the upper and lower rollers, the length of the tube to be cleaned is long. Even if the weight of the cleaning tube becomes large, it can be dealt with by increasing the size of the cleaning drum, and it can be applied to a considerably long tube.

[0034]

As described above, according to the present invention, the cleaning / drying work in the pipe, which has been conventionally carried out by the two working steps of cleaning and drying, can be carried out at the same time, and the generated dust can be recovered. The working time can be shortened and the working environment can be improved. In addition, since the cleaning brush can be run remotely and automatically, the labor of the operator can be reduced and the work in the narrow space can be performed, so that the cleaning and drying work of the inner surface of the long pipe can be performed efficiently. effective.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of a pipe inner surface cleaning / drying device of the present invention.

FIG. 2 is a sectional view showing the details of the mechanism of the embodiment of the cleaning / drying head portion of the present invention.

FIG. 3 is a side view showing details of the mechanism of the embodiment of the winding device of the present invention.

FIG. 4 is a cross-sectional view showing details of the mechanism of the embodiment of the winding device of the present invention.

FIG. 5 is a side view showing details of the embodiment of the cleaning tube feeding mechanism of the present invention.

FIG. 6 is a view seen from the arrow A of FIG.

FIG. 7 is a structural diagram of a tube and a tube sheet to which the present invention can be applied.

[Explanation of symbols]

 1 Tube 2 Cleaning Brush 3 Drying Nozzle 4 Adapter 5 Exhaust Hose 6 Filter 7 Flexible Tube 8 Upper Feed Roller 9A, 9B, 9C Feed Flexible Shaft 10 Tube Winding Drum 11 Lower Feed Roller 12 Frame 13 Exhaust Device 14A, 14B For Cleaning Flexible shaft 15 Drying air tube 16 Drying unit 17 Cleaning motor 18 Feeding motor 19 Cable 20 Operation panel 21 Brush shaft 22 Air outlet 23 Sleeve 24 Set screw 25 Bearing 26 Drying head 27 Air hole 28 Bearing 29, 30 Stop Screw 31 Coupling 32 Outer cylinder 35 Reducer 36, 37 Gear 38, 39 Shaft 40 Frame 41 Guide roller 42 Drive pulley 43 Driven pulley 44 Adjustment screw 45 V belt 46 bar 47 roller 48 gearbox 49 roller 50 spring 51 frame 52 drum shaft 53 air pipe 54 Gear 55 Gear box 56 the drum bearing 57 the shaft 58 welded portion 59 tubesheet

Claims (5)

[Claims] 1. An apparatus for cleaning the inside of a tube having a small diameter and a long length, at least one of which has an open end, wherein a rotary brush for cleaning the inside of the tube is provided at a tip portion of the tube inserted into the tube, Cleaning the inner surface of the pipe, which is equipped with a nozzle that injects a gas that dries the inside of the pipe.
Drying device. 2. The tube has an inner diameter of 15 mm to 100
The pipe inner surface cleaning / drying device according to claim 1, which has a length of 500 mm to 30,000 mm. 3. The tube is made of a flexible structure, provided with a winding drum for the tube, and a feeding mechanism for taking the tube in and out of the tube, and cleaning and drying the inside of the tube by remote automatic. The pipe inner surface cleaning / drying device according to claim 1. 4. The pipe inner surface cleaning / drying device according to claim 1, wherein a mechanism for sucking and collecting dust and the like in the tube is provided at a tube end on the side where the tube is inserted. 5. The pipe inner surface cleaning / drying device according to claim 1, wherein the pipe is used in a nuclear power generation facility contaminated with radioactive substances.