JP2000061420A - Cleaning device for inside of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device which efficiently and surely travels/cleans the inside of a pipe. SOLUTION: This device consists of a guide G, which has a fluid take-in port 1c, a fin rotating body 14, which is rotated by an air taken in from the fluid take-in port 1c, and a cleaning brush 4c, which is linked with the rotation of the fin rotating body 14. The cleaning brush 4c is rotated with a non-contact coupling using a magnet. A pipe inside wall-contact part of the guide part G is formed of a flexible material and a fluid passing hole 2c is bored in the outer circumferential part of the guide part G. A speed changing means 15 is interposed between the fin rotating body 14 and the cleaning brush 4c. A fluid direction-changing means is provided opposed to the fin rotating body 14 on the up stream side of an air in the position of the fin rotating body 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning for moving the inside of a long pipe by fluid pressure to remove deposits such as oil and rust adhering to the pipe to clean the pipe. Regarding the device.

[0002]

2. Description of the Related Art Generally, many pipes are used in a plant for producing food such as health drinks. In these piping systems, the inside of the piping is cleaned at regular intervals for the purpose of maintaining food quality, improving safety, and improving the durability of manufacturing plants. In addition to the above foods, for example, a large amount of suspended solids, oils, detergents, etc. are made to flow into the drain pipes of houses, office buildings, etc., but some of these adhere to the inner wall surface of the drain pipes. In some cases, the water may be deposited, the cross-sectional area of flowing water in the pipe may be narrowed, smooth discharge of drainage may be hindered, and finally the pipe may be blocked. As a result, sewage flows back from the drains of kitchens, bathrooms, washrooms, etc., which may fill the room with bad odors, corrode the inner wall of the drainage pipes, and eventually cause holes in the pipes. is there. Therefore, in order to eliminate such inconvenience and to permanently manufacture high-quality food, or to maintain a comfortable and hygienic living environment, it is desirable to clean the inside of the pipe systematically.

Under such circumstances, for example, Japanese Unexamined Patent Publication No. 8-
In Japanese Patent No. 164373, there are two front and rear moving devices, one rear moving device is temporarily fixed in a pipe and the other front moving device is expanded and contracted in a non-temporary state, and the other front moving device is not temporarily fixed. While moving forward, next,
The other front moving device that has been moved is temporarily fixed, and the temporary fixing of the temporarily fixed rear moving device is released, and the telescopic device is contracted to move the entire front moving device and the rear moving device forward. The technology is disclosed.

Further, in Japanese Unexamined Patent Publication No. 8-126876, a pressure-feeding hose connected to a cleaning liquid pressure-feeding device is inserted into a drainage system piping, and pressure is adjusted from a nozzle fastened to the tip of the pressure-feeding hose. The discharged cleaning liquid is ejected to remove the dirt attached to the inner wall surface of the drainage system pipe, and then the nozzle fastened to the tip of the pressure-feeding hose is gradually introduced to the inner part of the drainage system pipe. A technique has been proposed in which the cleaning is continued for a while, and then clean water is injected into the drainage piping to remove the residue remaining inside the piping. However, the above-mentioned means not only has a complicated structure or operation, but also has a drawback that the joint between the pipes is not always sufficiently cleaned.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a flexible pipe inside a long pipe or a curved pipe. Another object of the present invention is to provide an in-pipe cleaning device that can be reliably moved and cleaned.

[0006]

To solve the above problems, the following means 1 to 6 are adopted. 1. The pipe cleaning apparatus according to claim 1 of the present invention is a guide part G having a fluid intake 1c, a fin rotor 14 rotated by a fluid taken from the fluid intake 1c, and rotation of the fin rotor 14. And a cleaning brush (4c) interlocking with the above, which pumps the inside of the pipe by the fluid and cleans the inside of the pipe.

2. According to a second aspect of the present invention, there is provided an in-pipe cleaning device characterized in that the cleaning brush 4c is rotated by a non-contact coupling using the magnet 17 in the above means. 3. In the pipe cleaning device according to claim 3 of the present invention, in the means of 1 or 2, the pipe inner wall abutting portion of the guide portion G is formed of a flexible material, and the fluid passage hole is formed in the outer peripheral portion of the guide portion G. It is characterized by drilling 2c.

4. The pipe cleaning apparatus according to claim 4 of the present invention is characterized in that, in any one of the above-mentioned means 1 to 3, a speed changing means 15 is interposed between the fin rotor 14 and the cleaning brush 4c. 5. The pipe cleaning device according to claim 5 of the present invention is the above-mentioned 1
In any of the means of 4, the fluid direction changing means 11a is provided on the fluid upstream side of the position of the fin rotor 14 so as to face the fin rotor 14. 6. The pipe cleaning apparatus according to claim 6 of the present invention is the above
5 is characterized in that a wiping means 18 for wiping the inner peripheral surface of the pipe is provided prior to cleaning the cleaning brush 4c.

[0009]

Embodiments of the present invention will now be described in more detail with reference to the drawings. FIG. 1 shows a state in which the pipe cleaning device C is arranged in a pipe P to be cleaned. In FIG. 1, from the left side, a guide portion G including a setter guide 1, a setter 2, etc., a housing 3, a brush wheel 4 are shown. , A non-contact coupling part including a thrust cover 5, a rotor shaft 16 and the like, a cover part including a first cover 8, a second cover 10 and a fin cover 12, and a distributor 1.
1, a fin rotating body 14, and a rotating portion including a speed changing means 15. Hereinafter, each component of the pipe cleaning device C will be described in detail. In the following description, the expression "left" or "right" represents the left and right in each drawing.

The setter guide 1, which constitutes a part of the guide portion, is formed in a T-shape in a side view as a whole, and is made of an aluminum alloy, a steel material, or a hard synthetic resin. The setter guide 1 has a cylindrical portion 1a having a male screw 1d formed on the right end surface, a large diameter portion 1b made of a disc integrally attached to the left end portion of the cylindrical portion 1a, and a large diameter portion 1b.
And a fluid intake port 1c which is provided at the center of the cylinder and communicates with the center hole of the cylindrical portion 1a. The setter 2 that constitutes a part of the guide portion is formed of a flexible synthetic resin as a whole, that is, urethane in this embodiment. Setter 2 is
It is composed of a disk-shaped fluid receiving portion 2a slightly larger than the inner diameter of the pipe P to be washed, and a guide plate 2b formed continuously with the fluid receiving portion 2a. The fluid receiving portion 2a and the guide plate 2b are integrally formed, and the fluid passage 2
c is drilled.

The fluid receiving portion 2a is formed so that its outer periphery, that is, the sliding contact portion with the pipe P is bendable. Further, the guide plate 2b is formed such that its diameter is slightly smaller than the inner diameter of the pipe P. A plurality of fluid passage holes 2c are formed near the outer peripheral portions of the fluid receiving portion 2a and the guide plate 2b.
. Is formed so that air, which is a pressurized fluid, circulates. Further, a guide insertion hole 2d is provided at the center of the setter 2.
The cylindrical portion 1a of the setter guide 1 is inserted into the guide insertion hole 2d through the interposition pipe 2e. In this inserted state, as shown in FIGS. 1 and 2, the male screw 1d of the cylindrical portion 1a projects rightward from the right end wall of the setter 2.

Next, the non-contact coupling section will be described. First, the housing 3 screwed onto the male screw 1d of the setter guide 1 will be described. Housing 3
Is a disk-shaped large-diameter portion 3a, a wheel receiving cylinder portion 3b integrally provided at the center of the large-diameter portion 3a, and a diameter slightly smaller than the wheel receiving cylinder portion 3b and a female screw formed at the left end portion. The connecting tubular portion 3c is formed coaxially as a whole. Further, bolt holes 3d ... Are drilled in the peripheral portion of the large diameter portion 3a.

Next, the brush wheel 4 will be described. The brush wheel 4 is rotatably inserted into the outer periphery of the wheel receiving cylinder portion 3b of the housing 3. Brush wheel 4
Is a cylindrical portion 4a supported in a non-contact manner on the wheel receiving cylindrical portion 3b,
A driven magnet 4b, which is installed in the cylindrical portion 4a,
And cleaning brushes 4c, which are integrally planted at four locations on the outer circumference of the tubular portion 4a.
The cleaning brush 4c is formed of an integral synthetic resin, specifically polypropylene.

A thrust cover 5 is arranged on a step portion at the left end of the wheel receiving cylinder portion 3b of the housing 3. In the thrust cover 5, the brush wheel 4, which is loosely fitted in the wheel receiving cylinder portion 3b, is connected to the wheel receiving cylinder portion 3b from the connecting cylinder portion 3b.
It is to be supported so as not to fall off to the c side. Also,
For positioning the thrust cover 5, the connecting cylinder portion 3c
The band 6 is fixed to the outer periphery of the. Therefore, the position of the thrust cover 5 is specified by the band 6, and the brush wheel 4 is supported by the thrust cover 5 so as not to fall off from the wheel receiving cylinder portion 3b although it is rotatable.

On the right side of the housing 3, a first cover 8 is provided with a bolt b.
・ Attached by. The first gasket 7 is made of Teflon and improves the airtightness of the housing 3 and the first cover 8. The first cover 8 is formed with a fluid passage 8a ... In the shape of a ring having a constant width from the central portion, and a bolt hole 8c for fixing the speed change means 15 inside thereof.
..., and bolt holes 8b ... Are drilled around it.

On the right side of the first cover 8, a second cover 10 is further arranged via a second gasket 9 made of silicon rubber. Similarly to the first cover 8, the second cover 10 is also provided with a fluid passage 10a at its center and bolt holes 10b at its periphery. On the right side of the inner peripheral surface on the right side of the second cover 10, there are formed guide ridges and ridges 10c for air guide.
5 is supported by this ridge portion.

Next, the distributor 11 will be described. The distributor 11 is formed in a ring shape having a relatively thin width as a whole, and the fluid passage 11b at the center thereof is
A large number of guide slits 11a ... Are formed on the inner periphery of the guide slits 11a as means for changing the direction of air flow.

A fin cover 12 is further attached to the right of the distributor 11. Fin cover 12
Is formed of a large diameter portion 12a and a cylindrical portion 12b. In particular, as shown in FIGS. 1 and 2, the fin rotor 14 is axially supported inside the fin cover 12 to the right of the transmission means 15 by a rotary shaft 15b through a connecting shaft hole 14b thereof. Further, the damper 13 is connected and fixed to the fin rotating body 14 via a fin rotating shaft 14a by a connecting hole 13a.

A fin disc 14c is formed on the fin rotating body 14, and a fin rotating shaft 14a provided so as to project to the right of the fin disc 14c is connected to the connecting hole 13a. Further, on the disk-shaped fin disk 14c, the fins 14d ...
Are formed in large numbers. The damper 13 has a function of a flywheel, and allows the fin rotor 14 to rotate stably by inertial force.

In the present embodiment, a unit type of a known harmonic drive (registered trademark No. 801166) manufactured by Harmonic Drive Systems Co., Ltd. is adopted as the transmission means 15. The harmonic drive consists of three basic elements: a wave generator, a flexspline, and a circular spline. By rotating the wave generator, a reduction ratio (1/10 to 1/50) is achieved without using a complicated mechanism or structure. This is a transmission that can rotate the flexspline with (not shown). When this transmission is applied to the present embodiment, a particularly desirable reduction gear ratio is 1/20 to 1/30.

The connecting shaft hole 1 on the left side of the fin rotating body 14
A rotating shaft (wave generator side) 15b of the harmonic drive 15 is integrally inserted in the 4b, and is arranged for converting (decelerating) into a required rotational force by a rotor shaft (flex spline side) 16 described later. The right side of the large diameter portion (outer cylinder portion) 15a of the harmonic drive 15 is supported and fixed to the convex portion of the guide uneven strip 10c, and the left side of the large diameter portion (outer cylinder portion) 15a is fixed to the first cover 8 by the bolt b. It is fixed by using three bolt holes 8b.

As described above, the harmonic drive 15
The rotor shaft 16 is integrally provided on the left side (driven side) of the. The position of the rotor shaft 16 is located in the fluid passage hole at the center of the wheel receiving cylinder portion 3b.
Further, four magnets 17 ... Are fixed to the outer circumference of the rotor shaft 16 at equal intervals. Since the rotor shaft 16 is integrated with the rotary shaft 15b in the harmonic drive 15, the fin rotor 14
Rotation is greatly reduced and transmitted to the rotor shaft 16, and the magnets 17 provided on the outer circumference of the rotor shaft 16 rotate in the wheel receiving cylinder portion 3b.

Further, the housing 3, the first cover 8,
Seals 18 made of urethane, which is an elastic material, are attached to the outer peripheral portions of the second cover 10 and the distributor 11, and are fixed to the outer peripheral portions by, for example, rubber. The seal 18 is formed in a cylindrical shape as a whole, the outer diameter of which is larger than the inner diameter of the pipe P, and the inner diameter of which is slightly smaller than the outer diameters of the housing 3, the first cover 8, the second cover 10 and the distributor 11. Formed and covered.

The configuration of each component of this embodiment is as described above. Next, the assembly of each member will be described. In the pipe cleaning device C of the present embodiment, the setter guide 1, the setter 2, the housing 3, the brush wheel 4, the first cover 8, the second cover 10, as the entire frame thereof, And the fin cover 12 is formed as an outer frame. Then, in the central portions of these members, there are formed through holes through which air flows from left to right, and the first cover 8 and the second cover 1 are formed in these through holes.
Harmonic drive 15 supported by 0 and fixed
(The large-diameter portion 15a is fixed) is arranged, the rotor shaft 16 having the fin rotor 14 and the damper 13 on the right side of the rotary shaft 15b of the harmonic drive 15, and the magnet 17 on the outer periphery on the left side. Will be arranged as a coaxial rotating body.

A pipe-shaped seal 18 having an outer diameter larger than that of the pipe P is arranged outside the entire structure, that is, outside the housing 3, the first cover 8, the second cover 10 and the distributor 11. It The seal 18 is made of urethane, and when the pipe cleaning device C moves in the pipe P, the seal 18 receives air pressure and slides on the inner wall of the pipe P while being compressed.

Next, the function of the pipe cleaning device C will be described. When inserting the in-pipe cleaning device C into the pipe P to be cleaned, a setter 2 and a brush wheel 4 having sizes matching the inner diameter of the pipe P are selected. First, a suitable brush wheel 4 is fitted to the wheel receiving cylinder portion 3b, the thrust cover 5 is set, and then the band 6 is used to set the thrust cover 5.
Secure it so that it does not fall out. Next, as shown in FIG. 1, a setter 2 having a diameter slightly larger than the inner diameter of the pipe P is selected and fitted into and attached to the setter guide 1, and the male screw 1d of the setter guide 1 is screwed into the thread portion of the housing 3. By doing so, it is attached to the housing 3.

Next, the pipe cleaning device C is arranged in the pipe P as shown in FIG. 1, and the low pressure is applied to the rear side of the pipe cleaning device C, that is, from the left side of FIG. 1 toward the setter 2. , For example, an air pressure of 0.2 kg / cm ² is applied. A part of the pressurized air passes through the fluid passage holes 2c, ... Of the setter 2, further passes through the cleaning brush 4c, passes through the seal 18, and exits forward. The pressurized air that has entered from the fluid intake 1c provided at the center of the setter guide 1 passes through the center of the housing 3, the first cover 8, the second cover 10, and the fin rotating body 14 and moves forward. It will blow through. The pressurized air that has entered from the fluid intake port 1c collides with the fins 14d ... Of the fin rotating body 14 in the middle thereof and rotates the fin rotating body 14. That is, it rotates within the fin cover 12 like a so-called windmill.

This rotational force is decelerated by the harmonic drive 15, and is stably rotated by the rotational inertial force of the damper having a large second moment of area, which causes the rotor shaft 16 to rotate at a constant speed, and the magnet 17 rotates. . Due to the rotation of the magnet 17, a starting (rotating) force is generated in the driven magnet 4b that is arranged around the magnet 17, that is, outside the wheel receiving portion 3b in a non-contact state, and the brush wheel 4 is rotated at a constant speed. Become. By this rotation, the cleaning brushes 4c ... Slidably contact the inner circumference of the pipe P to clean the inner wall of the pipe. In summary, due to the action of the pressurized air, the pipe cleaning device C moves forward in the pipe P to the right, and the fin rotor 14 rotates due to the partial pressure of the air pressure, and the cleaning brush 4c ... Will clean the inner wall of the pipe P.

After cleaning, the pipe cleaning device C is
Although it can be taken out from the other end, that is, the right end in FIG. 1, if it cannot be taken out from the other end, a pulling string may be attached to the in-pipe washing device C, and after washing, it may be pulled back to the left, that is, to the left. .

The main pipe cleaning device C can be applied to pipes P having various thicknesses. That is, it can be performed by changing the setter 2 and the brush wheel 4 depending on the inner diameter of the pipe P. This operation is sufficient because it is sufficient to remove the setter guide 1, the band 6 and the thrust cover 5 from the housing 3 and then replace the setter 2 and the brush wheel 4. Therefore, the replacement operation is very easy.

In particular, in this embodiment, since the moving and cleaning brushes of the apparatus are all driven by air pressure, not only the movement and rotation of the cleaning brush 4c are reasonable, but also the cleaning brush 4
Even if a relatively large resistance is applied to c ..., it is not in a mechanical power transmission state, and therefore it rarely breaks down. That is, the guide portion G having the fluid intake port 1c at the center, the fin rotating body 14 rotated by the fluid taken in from the fluid intake port 1c, and the fin rotating body 14
The cleaning brush 4c that is interlocked with the rotation of the pipe, and the structure in which the inside of the pipe is pumped by the fluid and the inside of the pipe is cleaned, the inside of the pipe can be cleaned simply by the fluid pressure to the guide portion G.

Further, since the cleaning brush 4c is rotated by the non-contact coupling using the magnet 17, the rotation driving portion of the cleaning brush 4c is separated from the cleaning brush 4c, so that the cleaning brush 4c becomes dirty and separated. The durability of the entire apparatus is high without being affected by the rotary drive unit. Further, by forming the pipe inner wall abutting portion of the guide portion G with a flexible material and forming the fluid passage hole 2c in the outer peripheral portion of the guide portion G, the fluid pressure effectively acts on the guide portion G. Together with the fluid passage 2c
By the fluid passing through, the pipe cleaning device C can be smoothly advanced at a substantially constant speed.

Further, the fin rotating body 14 and the cleaning brush 4c
By interposing the harmonic drive 15 between
The rotating force of the fin rotating body 14 can be efficiently converted into the rotating force of the cleaning brush. Further, by connecting the damper 13 to the fin rotating body 14, even if the fluid pressure on the fin rotating body 14 changes, the inertial force of the damper 13 can rotate the cleaning brush 4c at a substantially constant rotation speed. It is possible to realize a substantially uniform cleaning action with respect to. Further, by providing the guide slit 11a facing the fin rotor 14 on the fluid upstream side of the position of the fin rotor 14,
The fluid can efficiently act on the fins 14d. Thereby, the fin rotating body 14 can be smoothly rotated. Further, by providing the seal 18 for wiping the inner peripheral surface of the pipe prior to cleaning the cleaning brush 4c, the inner peripheral surface of the pipe can be cleaned in advance and the subsequent cleaning can be smoothly performed. Further, since the seal 18 also receives the fluid pressure, it is possible to further smoothly move the entire apparatus.

Although air is used as the pressurized fluid in the above embodiment, a liquid such as water may be used. Further, a cleaning auxiliary agent or the like may be appropriately added to these fluids. Further, before and after the harmonic drive 15, or in the harmonic drive 15, a means for changing the rotational speed in a plurality of stages, that is, a variable speed change means may be provided to appropriately adjust the moving speed and the cleaning action force. In addition, although the reference numerals in the claims are attached to clarify the correspondence with the embodiments, the present invention is not limited thereto.

[0035]

The present invention has the following effects due to the above configuration. 1. According to the first aspect of the present invention, the guide portion having the fluid intake port at the central portion, the fin rotating body rotated by the fluid taken in from the fluid intake port, and the cleaning brush interlocked with the rotation of the fin rotating body. Since the inside of the pipe is pumped by the fluid and the inside of the pipe is cleaned, the inside of the pipe can be cleaned simply by the fluid pressure applied to the guide portion.

2. According to the second aspect of the present invention, in addition to the above effect, by rotating the cleaning brush by the non-contact coupling using the magnet, the rotation drive unit of the cleaning brush is separated from the cleaning brush. Since the rotary drive unit is not affected by the dirt separated by, the durability of the entire device is high. 3. According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, the tube inner wall contact portion of the guide portion is formed of a flexible material, and the outer peripheral portion of the guide portion is formed. By forming the fluid passage hole in the, the fluid pressure effectively acts on the guide portion, and the fluid passing through the fluid passage hole can smoothly advance at a substantially constant speed.

4. According to the invention of claim 4, in addition to the effect of any one of the inventions of claims 1 to 3, by providing a speed changing means between the fin rotating body and the cleaning brush, the fin rotating body is provided. Even if the fluid pressure with respect to fluctuates, the cleaning brush can be rotated at a substantially constant number of rotations, and a substantially uniform cleaning action on the inner wall of the pipe can be realized. 5. According to the invention of claim 5, in addition to the effect of any one of the inventions of claims 1 to 4, a fluid direction changing means is provided on the fluid upstream side of the position of the fin rotating body so as to face the fin rotating body. By providing the fluid, the fluid can efficiently act on the fins.

6. According to the invention of claim 6, in addition to the effect of any one of the inventions of claims 1-5, a wiping means for wiping the inner peripheral surface of the pipe is provided prior to cleaning the cleaning brush 4c. Thus, the inner peripheral surface of the pipe can be cleaned in advance, and the subsequent cleaning can be smoothly advanced. Moreover, since the wiping means also receives the fluid pressure, it is possible to further smoothly move the entire apparatus.

[Brief description of drawings]

FIG. 1 is a side view of a partial cross section according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the embodiment.

FIG. 3 is a rear view of the embodiment.

FIG. 4 is a front view of the embodiment.

FIG. 5 is an exploded perspective view of the embodiment.

[Explanation of symbols]

C ... Pipe cleaning device G: Guide section P ... tube b ... bolt 1-setter guide 1a: Cylindrical part 1b ... large diameter part 1c ... Fluid intake port 1d ... Male screw 2 ... setter 2a ... Fluid receiving part 2b ... Guide plate 2c ... Fluid through hole 2d: Guide insertion hole 2e ... Interposed pipe 3 ... Housing 3a ... Large diameter part 3b: Wheel receiving part 3c ... Connection tube part 3d ... Bolt hole 4 ... Brush wheel 4a ... Cylinder 4b: driven magnet 4c: Cleaning brush 5 ... Thrust cover 6 ... Band 7: first gasket 8: First cover 8a ... fluid passage 8b ... Bolt hole 8c ... Bolt hole 9 ... Second gasket 10-Second cover 10a ... Fluid passage 10b ... Bolt hole 10c ··· Guide uneven surface 11. Destributor 11a ... fluid direction changing means (guide slit) 11b ... Fluid passage 12 ... Fin cover 12a ... Large diameter part 12b ... Cylinder 13 ... Damper 13a ... Connection hole 14 ... Fin rotating body 14a ... Fin rotating shaft 14b ... Connecting shaft hole 14c ... Fin disk 14d ... Fin 15..Transmission means (harmonic drive) 15a ... Large diameter part 15b ... Rotating shaft 16 ... Rotor shaft 17 ... Magnet 18 ... Wiping means (seal)

Claims (6)

[Claims] 1. A guide portion G having a fluid intake 1c,
The fin rotating body 14 is rotated by the fluid taken in from the fluid intake port 1c, and the cleaning brush 4c is interlocked with the rotation of the fin rotating body 14. The inside of the pipe is pumped by the fluid and the inside of the pipe is cleaned. Characteristic pipe cleaning device. 2. The pipe cleaning apparatus according to claim 1, wherein the cleaning brush 4c is rotated by a non-contact coupling using a magnet 17. 3. The pipe inner wall abutting portion of the guide portion G is formed of a flexible material, and the fluid passage hole 2c is formed in the outer peripheral portion of the guide portion G. 2. The in-pipe cleaning device according to 2. 4. The in-pipe cleaning device according to claim 1, further comprising a speed change device 15 interposed between the fin rotating body 14 and the cleaning brush 4c. 5. The in-pipe cleaning device according to claim 1, wherein a fluid direction changing means 11a is provided on the fluid upstream side of the position of the fin rotor 14 so as to face the fin rotor 14. 6. The in-pipe cleaning device according to claim 1, further comprising a wiping means 18 for wiping the inner peripheral surface of the pipe prior to cleaning the cleaning brush 4c.