JP2645971B2 - Inner surface cleaning device for tubular body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning the inner surface of a tubular body for removing foreign matters such as welding debris and dust remaining on the inner surface of a pipe, or for cleaning and removing processing debris remaining on the inner surface of a duct. .

[0002]

2. Description of the Related Art For example, in order to remove welding debris that scatters on the inner surface of a pipe during welding, conventionally, compressed air or high-pressure water is sprayed on the inner surface of the pipe, and the inside of the pipe is cleaned by the impact of these high-pressure fluids. (Literature unknown).

[0003]

In a mode in which the inner surface of a pipe is cleaned using a high-pressure fluid, in addition to a device and equipment for generating and injecting the high-pressure fluid, scattering of a jet fluid containing welding debris, dust, and the like is performed. It was necessary to prepare equipment for preventing and collecting foreign substances, and auxiliary equipment such as a water treatment apparatus, and the entire apparatus was large-scale, the equipment cost was high, and the space required for the installation was large.

[0004] The finishing mode using a high-pressure fluid can completely remove foreign matters such as welding debris, and is convenient when the steel pipe is applied to, for example, pipelines for various plants in which foreign matters are not to be mixed. However, when using steel pipes as structural materials such as utility poles and aggregates for buildings, there is no problem even if the degree of removal of foreign matter is low, but in such cases the same cleaning process is performed. There is waste in the processing, and the cost of manufacturing the steel pipe is high accordingly.

An object of the present invention is to provide a structure suitable for a tubular body such as a structural steel pipe or duct which does not require a high-level cleaning treatment.
An object of the present invention is to provide an inexpensive and compact inner surface cleaning device.

[0006]

According to the present invention, there is provided an inner surface cleaning apparatus, comprising: a cart 4 having a cleaning body 11 attached to a tip thereof;
A traveling frame 3 for moving and guiding the carriage 4 and the operating band 5 on the gantry 1, and a traveling body located on the traveling frame 3. A drive mechanism 2 for reciprocating the drive 13 is provided. Operation zone 5
Adjacent traveling bodies 13 are connected to be able to bend only downward from the traveling surface. Then, the carriage 4 is reciprocally driven by the drive mechanism 2 via the operation band 5 along the inner bottom surface of the tubular body P fixed on the extension of the traveling frame 3.

Specifically, the guide frame 6 is provided below the traveling frame 3.
And an operation band 5 bent in an inverted shape at one end of the traveling frame 3.
Are supported by the guide frame 6. A hoisting device 41 that winds the operation band 5 moving rearward beyond the traveling frame 3 is disposed below the rear portion of the traveling frame 3. A group of traveling bodies 13 is connected to a chain 14
Connect through. The traveling body 13 has a roller 17 and a roller frame 16 that supports the roller 17, and a regulating piece 18 that prevents refraction of the roller frame 16 from above is provided between adjacent roller frames 16.

[0008]

In use, the carriage 4 is pushed out of the traveling frame 3 into the inner surface of the tubular body P, and the cleaning body 11 provided at the tip thereof is provided.
Then, foreign substances such as welding debris and dust adhering to the inner surface of the tubular body P are scraped off. At this time, the operation belt 5 enters the inside of the tubular body P together with the bogie 4. However, since the refraction direction of the adjacent traveling bodies 13 is regulated in one direction by the regulating pieces 18, even if the extension dimension becomes large. The bogie 4 can be pressed and moved to the end opening of the tubular body P without being bent in a mountain shape. As described above, when the foreign matter is scraped off by the cleaning body 11 and removed, fine foreign matter cannot be removed, but a state in which there is no problem in use is obtained. Since foreign matter is removed only by mechanical force, the structure of the entire apparatus can be simplified and made compact. Since the carriage 4 is reciprocated using the operation band 5 that can be bent only in one direction as a transmission body, the operation band 5 can be bent and stored when not in use or in a standby state, which also contributes to downsizing of the entire apparatus.

[0009]

According to the present invention, the operation belt 5 composed of a group of traveling bodies 13 is reciprocated by the driving mechanism 2, and foreign matter on the inner surface of the tubular body P is removed by the cleaning body 11 provided on the carriage 4 at the tip end. I did it. Therefore, compared to the conventional inner surface cleaning mode in which high-pressure water or compressed air is injected to remove foreign substances, there is no need to provide extra auxiliary equipment for dust treatment, water treatment, and the like. It can be made compact and the cost of its introduction can be significantly reduced. Furthermore, since foreign matter is removed only by mechanical force, the operating cost can be reduced as compared with the case of using a high-pressure fluid, and there is no excess or deficiency in the cleaning state, so that the manufacturing cost of the tubular body P can be reduced.

[0010]

In FIG. 1, an inner surface cleaning device includes a gantry 1, a drive mechanism 2 provided on the gantry 1, and a traveling frame 3 horizontally projecting from one end of the gantry 1 toward a fixed tubular body P. And a guide frame 6 extending from below the traveling frame 3 toward the space below the tubular body P, and the like. The tubular body P is a welded steel pipe for a utility pole. After a welding process, the tubular body P is fed horizontally in a direction orthogonal to the pipe axis, one opening of which is fixed at a position facing the traveling frame 3 and is attached to the inner wall. It is subjected to a process for removing foreign matters such as remaining welding residues.

The carriage 4 comprises a downwardly opening frame 8 having a U-shaped cross section, and rollers 9 pivotally supported on the left and right sides of the frame 8 at regular intervals, as shown in FIG. The holder 10 is fixed to the (end on the tubular body P side), and a scraper 11 (cleaning body) for scraping off foreign matter is mounted on the holder 10 in a replaceable manner. The scraper 11 is formed of a tough plastic material having wear resistance such as polyamide resin, or a metal such as steel, and has an arcuate blade surface 11a along the concave surface of the tubular body P. A cleaning brush 12 is provided on the lower surface of the frame 8 near the holder 10. In order to perform a return operation of a traveling plate 3a described later using the retreating operation of the cart 4,
An engagement piece 10a is provided at the lower end of the holder 10 so that the engagement piece 10a can be engaged with the contact piece 39 of the traveling plate 3a (see FIG. 2).

An operation band 5 is provided to feed the carriage 4 into the tubular body P or to pull it back from the inside of the tube. In FIG. 3, the operation belt 5 includes a group of traveling bodies 13,
And a chain 14 for connecting them.
The reciprocating drive of the drive mechanism 4 by the drive mechanism 2 enables the front and rear movement on the traveling frame 3. In FIG. 5, the traveling body 13 includes a roller frame 16 having a U-shaped cross section mounted on a chain 14 via a bracket 15, and a pair of left and right rollers 17 supported by the roller frame 16. However, in this embodiment, the roller 17 is pivotally supported at every other adjacent roller pair 16.
At the front end of the upper surface of the adjacent roller frame 16, a regulating piece 18 for preventing the operation band 5 from being bent in a mountain shape inside the tubular body P.
Is protruding. This restricting piece 18 is provided with the front roller frame 16.
It is covered on the upper surface. The guide frame 6 is formed of a channel material having a U-shaped cross section, one end of which is supported by the gantry 1 and is gently inclined downward toward the space below the tubular body P.

In FIGS. 3 and 5, the traveling frame 3 has a traveling plate 3a for supporting the carriage 4 and the traveling body 13, and a holding frame for regulating the lifting of the carriage 4 and the traveling body 13 above the traveling plate 3a. 19 are provided. The traveling plate 3a is supported by the fixed frame 3b via rollers 32 so as to be able to move back and forth. The traveling plate 3a is advanced forward by a feed belt 33 provided on the lower surface thereof, and the leading end contacts the tubular body P. In order to avoid interference with the first sprocket wheel 24 described later, the traveling plate 3
An escape groove 34 is provided in the center of the rear part of the section a. In order to support the operation band 5 via the chain 14 when the traveling plate 3a moves forward, a receiving frame 38 is provided at the left and right center of the pair of fixed frames 3b (see FIG. 3). The feed belt 33 is driven by a dedicated motor (not shown). The front end bracket supporting the holding frame 19 is provided with a limit switch 29 for detecting that the carriage 4 has returned to a predetermined position.

In FIG. 4, the drive mechanism 2 includes a motor 22 with a speed reducer, an electromagnetic clutch 23, a group of transmission gears 35, a winding transmission mechanism using a timing pulley 36 and a chain 37 as a transmission medium. Finally, the first to third sprocket wheels 24, 25 and 26 are synchronously driven to reciprocate the operation band 5. As shown in FIG.
Two of the sprocket wheels 24, 25, and 26 are disposed at the middle and rear ends of the traveling frame 3, and the other is disposed above the guide frame 6. 1st sprocket wheel 2
The upper part of 4 protrudes above the traveling plate 3a of the traveling frame 3 and meshes with the chain 14 of the operation band 5 (see FIG. 5).
Also, the second sprocket wheel 25 at the rear end of the traveling frame 3
Engages with the chain 14, and guides the chain 14 and the traveling body 13 to be inverted and moved toward the guide frame 6. A regulating plate 27 for preventing the operation band 5 from coming off is provided along the outer periphery of the rear part of the sprocket wheel 25. The regulating plate 27 can swing back and forth, and is urged by a spring 28 toward the second sprocket wheel 25. In FIG.
0 is a control panel.

In the standby state, the carriage 4 is located at the front of the traveling frame 3, and most of the operation band 5 is inverted by the second sprocket wheel 25 and is located within the guide frame 6. The roller 17 of the traveling body 13 is
Rolling on the guide frame 6 prevents the roller frame 16 from contacting the guide frame 6.

When the tubular body P is sent to a predetermined position, this is detected by a sensor and the motor 22 is started.
The motor power is transmitted to the first to third sprocket wheels 24 to 26 via the drive mechanism 2 to drive the operation band 5 toward the tubular body P for driving. At the same time, the feed belt 33 is driven, and the traveling plate 3a contacts the tubular body P. Operation belt 5
The carriage 4 moves from the traveling plate 3a to the inside of the tubular body P, and advances while the scraper 11 at the tip thereof is in contact with the inner wall of the tubular body P. Therefore, foreign matter such as welding residue remaining on the inner side wall of the tubular body P is scraped off by the blade surface 11a of the scraper 11, and is discharged from the pipe end. Immediately before the scraper 11 reaches the pipe end, the drive mechanism 2 automatically stops, and is immediately driven in reverse to retreat the carriage 4 and the operation band 5. When the carriage 4 comes out of the tubular body P, the engaging piece 10a engages with the contact piece 39, so that the traveling plate 3a returns to the standby state. Thereafter, the cleaned tubular body P is sent to the next step, the new tubular body P is fixed at a predetermined position, and the carriage 4 is driven back and forth in the same manner as described above to remove foreign matter.

As described above, in the standby state, the operation band 5
Is inverted at the rear end of the traveling frame 3 and housed in the guide frame 6, the traveling belt 5 is placed in an empty space below the tubular body P.
This is advantageous in that it can accommodate Tubular body P to be treated
Has an inner diameter of 80 to 500 mm, and can process a tubular body P up to 12 m in length. The moving speed of the operation band 5 can be changed to be large or small as necessary, and the carriage 4 can be reciprocated a plurality of times.

FIG. 6 shows another embodiment. In this case, the hoisting device 41 is arranged at the lower rear part of the traveling frame 3, and the operation belt 5 located behind the traveling frame 3 is wound by the hoisting device 41 in a standby state. This embodiment corresponds to a case where the space below the tubular body P cannot be used. By winding and storing the operation band 5, the occupied space of the entire apparatus can be reduced. The hoisting device 4
The first winding cylinder is composed of first and second sprocket wheels 24.2.
5 and is driven to rotate in synchronization with the rotation speed of 5.

In the above embodiment, the chain 1
Although the traveling body 13 is driven back and forth via the line 4, it is not necessary. For example, a group of traveling bodies 13 can be connected in the same manner as a chain, and this can be directly reciprocated by a sprocket wheel, gear, or feed chain mechanism. The inner surface finishing device of the present invention can be used to remove processing dust and the like on the inner surface of the spiral duct other than the pipe. As for returning the traveling plate 3a from the advanced position, the motor for the feed belt 33 may be reversed to return. Using the holder 10 as the engaging piece 10a, a contact piece 39 for contacting the engaging piece 10a can be provided on the traveling plate 3a.
The contact piece 39 in this case is formed in a gate-shaped frame surrounding the frame 8. First and second sprocket wheels 24.2
A fixed traveling plate is provided instead of the receiving frame 38 between the five, and only the traveling plate 3a ahead of the fixed traveling plate can be moved back and forth. As the cleaning body 11, a brush such as a bristle brush or a wire brush can be used other than the scraper.

[Brief description of the drawings]

FIG. 1 is an overall side view.

FIG. 2 is a side view of a cart and an operation band.

FIG. 3 is a partially broken side view showing a drive structure of the operation console.

FIG. 4 is a plan view of a driving mechanism.

FIG. 5 is a sectional view of a traveling frame.

FIG. 6 is an overall side view showing another embodiment.

[Brief description of reference numerals]

 Reference Signs List 1 gantry 2 drive mechanism 3 traveling frame 3a traveling plate 4 carriage 5 operation band 6 guide frame 11 cleaning body (scraper) 14 chain 18 regulating piece 41 hoisting device P tubular body

Claims (4)

(57) [Claims] 1. A trolley 4 having a cleaning body 11 mounted on its tip.
And an operation band 5 composed of a group of traveling bodies 13 for pushing and pulling the carriage 4. On the gantry 1, a traveling frame 3 for transitionally guiding the carriage 4 and the operation band 5, and on the traveling frame 3. A driving mechanism 2 for reciprocatingly driving the traveling body 13 is provided. The operation belt 5 is configured such that adjacent traveling bodies 13 are connected to bendable only downward from the traveling surface thereof. An apparatus for cleaning the inner surface of a tubular body, wherein the carriage (4) is reciprocally driven by a drive mechanism (2) via an operation band (5) along the inner bottom surface of the tubular body (P) fixed on the extension. 2. The inner surface of the tubular body according to claim 1, wherein a guide frame is disposed below the traveling frame, and an operation band bent at an end of the traveling frame in an inverted manner is supported by the guide frame. Cleaning device. 3. The apparatus for cleaning the inner surface of a tubular body according to claim 1, further comprising a hoisting device for winding an operation band moving rearward beyond the running frame, below the rear portion of the running frame. 4. A group of traveling bodies 13 are connected via a chain 14, and the traveling body 13 has a roller 17 and a roller frame 16 for supporting the roller 17, and adjacent roller frames 16 A regulating piece (18) for preventing upward refraction of the roller frames (16) between them.
An apparatus for cleaning the inner surface of a tubular body according to claim 1.