JPH08126944A - Pipe inner surface scaling device - Google Patents

Abstract

PURPOSE: To shorten the whole length of the device, and thereby save a setting space by providing a scale cleaning means for the tip end of a slave beam which is mounted on a master beam in such a way that it can be moved back and forth. CONSTITUTION: A pipe 17 is located at a specified position by means of a roller conveyor 38, and a master beam 13 is advanced with a drive motor 28 advanced. By this constitution, a sprocket 12 at the rear section is meshed with a link chain 15 at the lower section so as to be rotated, the link chain 15 at the upper section is simultaneously pushed forward, and a slave beam 14 is thereby be concurrently pushed forward accompanied with the movement of the link chain. In this case, when the master beam 13 is moved by a distance S, the slave beam is also moved by the distance S, and this constitution thereby causes a cleaning air nozzle 16 to be moved to the tip end of the pipe 17. Next, when pressure air is fed to an air feed hose, air is blown off out of the cleaning air nozzle 16, scales adhered thereon and the like are thereby removed.

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 scale removing device for removing scales on the inner surface of a cylinder such as various tubes and polishing if necessary.

[0002]

2. Description of the Related Art In the production of welded pipes and the like, if there is scale in the pipe, the scale may be mixed with the flux and cause welding defects. Therefore, as shown in FIG. 5, a cleaning air nozzle 53 is attached to the tip of the advancing / retreating rod 52 of the cylinder 51 having a stroke 2S corresponding to the length 2S of the pipe 50 to be polished, and once inserted into the back of the pipe 50. A scale removing device 54 has been used which removes adhered scale while retracting the cleaning air nozzle 53 by the cylinder 51. In addition, instead of the cleaning air nozzle 53, a rotary brush equipped with a driving motor is attached to the tip of the advancing / retreating rod 52, and the rotary brush is rotated at high speed to remove the internal scale. It had been. On the other hand, JP-A-3-
Japanese Patent No. 264260 has proposed a polishing device in which an abrasive is coated around the balloon that expands and contracts by air.

[0003]

However, in the scale removing device 54, when cleaning the inner surface of the long pipe 50, the cylinder 51 having a length corresponding to the pipe 50 is required, and the device space is small. This is a long problem, and this is a similar problem even when the polishing apparatus described in JP-A-3-264260 is used. Further, in the scale removing device having a structure in which the rotating brush is attached to the tip of the advancing / retreating rod 52, it is necessary to dispose a motor or a sensor on the inner surface of the pipe 50 where the scale is generated. As a result, there is a problem that the motor etc. is damaged and the life is short. Further, in such a device, since various devices are loaded on the moving part, there is a problem that the moving speed is slow and the productivity is poor.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide a pipe inner surface scale removing device that can reduce the device space, has high durability, and has high productivity.

[0004]

A method according to the above-mentioned object.
The pipe inner surface scale removing device described above moves back and forth along a base arranged on one side of a pipe from which the inner surface scale is to be removed, and a guide provided on the base, and a horizontal shaft is provided on the base end side. A parent beam having a rotatable sprocket having, a lower end one end of which is fixed to a base, and a chain member which meshes with the sprocket and folds back, and is attached to the parent beam so as to be movable back and forth, It has a child beam whose base is connected to the other end on the upper side, and a scale cleaning means provided at the tip of the child beam. Also,
The pipe inner surface scale removing device according to claim 2 is the device according to claim 1, wherein the scale cleaning means includes a cleaning air nozzle, and an air supply hose connected to the cleaning air nozzle is connected to the chain member. Piped along. The pipe inner surface scale removing device according to claim 3 is the device according to claim 1, wherein the scale cleaning means comprises a rotating brush, and a rotation drive source thereof is provided at a base end of the chain member. The rotary brush and the rotary drive source are connected via a flexible shaft arranged along the chain member. In the above description, the chain member means, for example, a link chain having link plates on both sides and connected by pins.

[0005]

In the pipe inner surface scale removing device according to any one of claims 1 to 3, the sprocket can be freely rotated on the base end side of the parent beam that moves back and forth along the guide provided on the base provided on one side of the pipe. And a lower end of the sprocket is attached to the base, and a chain member is attached to the sprocket that is folded back to engage with the sprocket. The upper end of the chain member has a child beam that moves back and forth on the parent beam. , So that advancing the parent beam toward the pipe moves the sprocket along the lower chain member, which causes the sprocket to roll forward. Therefore, the upper chain member that is folded back and meshes with the sprocket is pushed to the front side and pushes the child beam to the front side, whereby the scale cleaning means provided at the tip of the child beam is attached to the pipe. It will be fitted on the inner surface. Next, when the parent beam is retracted while driving the scale cleaning means, the sprocket rotates and retracts the child beam at a speed twice that of the parent beam, gradually removing the scale on the inner surface of the pipe. You can do it. Here, since the moving distance of the child beam is double the moving distance of the parent beam, the parent beam can be shortened, and as a result, the installation space of the device can be shortened. Particularly, in the pipe inner surface scale removing device according to claim 2, since the scale cleaning means is composed of a cleaning air nozzle, and the air supply hose connected to the cleaning air nozzle is piped along the chain member, The air supply hose can be arranged in an orderly manner. Further, in the pipe inner surface scale removing device according to claim 3, the scale cleaning means is composed of a rotating brush, and power is transmitted from the motor by a flexible shaft arranged along the chain member. Can be fixedly arranged outside the pipe, whereby the motor can be arranged in a place with few scales and the like, and the motor can have a long life.

[0006]

Embodiments of the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. 1 (A) and 1 (B) are side views of the pipe inner surface scale removing device according to the first embodiment of the present invention in a partially omitted state, and FIG. 2 is a PP view in FIG. 1 (A). 'Cross section,
FIG. 3 is a sectional view taken along the line Q-Q ′ in FIG.
(A), (B) is a partially omitted side view of the operating state of the pipe inner surface scale removing device according to the second embodiment of the present invention.

As shown in FIG. 1, a pipe inner surface scale removing device 10 according to a first embodiment of the present invention is provided with a base 11 and a base 11 which can be moved back and forth and is rotated toward the base end side. Parent beam 13 with free sprocket 12 and parent beam 1
3 of the chain member, which is attached to the child beam 14 so as to be movable back and forth, meshes with the sprocket 12 in a folded state, one end is fixed to the base 11, and the other end is fixed to the end portion of the child beam 14. It has a link chain 15 which is an example, and a cleaning air nozzle 16 which is an example of a scale cleaning means attached to the tip of the child beam 14. Less than,
These will be described in detail.

The base 11 is arranged on one side of the pipe 17 from which scale is to be removed in the same direction as the pipe 17, and guides 18 and 19 made of grooved steel on both sides.
It has. A receiving roller 20 that receives the parent beam 13 rotatably is provided at the front portion. The guides 18, 19 are fitted with four wheels 21 provided on the front and rear sides of the rear portion of the main beam 13, respectively.
The parent beam 13 can freely move along the. Then, a pin rack 22 is provided at the bottom of the parent beam 13.
And a drive shaft 25 attached to the pin rack 22 via bearings 23 and 24 on the base 11 as shown in FIG.
The sprocket 26 fixed to
A drive motor 28 is connected to 5 via a coupling 27, and by rotating the drive motor 28, the parent beam 13 is moved back and forth.

A support plate 29 is provided at the rear of the parent beam 13.
30 and a horizontal shaft 31 fixed to the support plates 29 and 30
A pair of large-diameter sprockets 12 arranged with a gap therebetween are rotatably provided. A link chain 15 is meshed with the sprocket 12. One end of the link chain 15 is a base 1 as shown in FIG.
It is fixed to 1, and the other end is connected to the base end of the child beam 14.

Although the child beam 14 is mounted on the upper portion of the parent beam 13, the parent beam 13 has guide pieces 32 on both sides thereof.
33 is provided so that the child beam 14 moves along the parent beam 13, and a guide roller 34 is provided above the tip of the parent beam 13 so that the child beam 14 can advance and retract smoothly. ing. Also, the parent beam 13
A guide roller 35 is also provided under the tip of the pipe 1,
You can move smoothly inside 7.

A cleaning air nozzle 16 is provided at the front end of the child beam 14, and the child beam 14 is hollow as shown in FIG. 2 for sending compressed air to the cleaning air nozzle 16. Air supply hose 3 connected to
6 is a link chain 15 from the base end of the child beam 14.
The compressed air is supplied from the base end of the link chain 15 to the fixed pipe. The cleaning air nozzles 16 are symmetrically arranged facing diagonally rearward.
Alternatively, it is composed of three or more air blowing nozzles and blows compressed air to the inner surface of the pipe to push out the attached scale to the back side. A guide roller 37 that rolls on the inner surface of the pipe 17 is also provided at the tip of the child beam 14, so that the child beam 14 can smoothly move in the pipe 17.

Therefore, the pipe inner surface scale removing device 10
When using, the pipe 17 is arranged at a predetermined position by the roller conveyor 38, the driving motor 28 is rotated forward, and the parent beam 13 is moved forward. As a result, the rear sprocket 12 meshes with and rotates on the lower link chain 15, but pushes the upper link chain 15 forward, and accordingly pushes the child beam 14 forward. In this case, as shown in FIG. 1, when the parent beam 13 moves the distance S, the child beam 14 moves 2S, and the cleaning air nozzle 16 can be moved to the tip of the pipe 17. In this case, since the child beam 14 is pushed by the link chain 15, the child beam 14 is preferably made as light as possible, and the link chain 15 is also preferably a link plate having an appropriate weight.

Next, when compressed air is supplied to the air supply hose 36, air is ejected from the cleaning air nozzle 16 to remove adhered scale and the like. Therefore, the drive motor 28 is reversed as it is and the parent beam 13 is removed. Gradually retreat,
Make sure to clean the entire length of the pipe 17.

Next, a pipe inner surface scale removing device 40 according to a second embodiment of the present invention shown in FIG. 4 will be described. The same components as those in the above embodiment are designated by the same reference numerals and detailed description thereof will be given. The description is omitted. In this pipe inner surface scale removing device 40, a rotating brush 41 is provided as a scale cleaning means. And the rotating brush 4
The motor 42, which is the rotation driving source of
The rotary brush 41 and the motor 42 are connected to each other via a flexible shaft 43. The flexible shaft 43 is arranged in the link chain 15, and the child beam 14 is a rotary shaft having bearings on both sides. In addition, it is possible to form the child beam 14 and the link chain 15 as a continuous flexible shaft.

In using the pipe inner surface scale removing device 40, the rotary brush 41 is sent to the tip of the pipe 17 by the same operation as in the above embodiment, and then the main beam 13 is retracted to gradually rotate the rotary brush 41. Move backward while rotating,
The scale is removed while polishing the inner surface of the pipe 17 over the entire length. In this case, since the removed scale falls into the pipe, the cleaning air nozzle 16 shown in the first embodiment.
Can be further attached to the tip side of the rotary brush so that it can be blown off by compressed air. In this case, the rotary shaft arranged in the child beam 14 is hollow, and a rotary joint is used at the base end to connect the inside of the link chain 15 to the air supply hose 36 that is piped. The scale that has fallen may be removed in a separate step by using the pipe inner surface scale removing device 10 according to the first embodiment.
The present invention is also applicable to a case where the flexible shaft and the air supply hose are arranged in parallel in two rows inside the sprocket to achieve the above object.

In the above embodiment, the link chain 1
Although a link chain that can be bent in the direction of 360 degrees was used as No. 5, if a suitable stopper is attached to the link plate to prevent it from bending more than 180 degrees, the weight of multiple links pushes the child beam, so that it can be fed smoothly. it can.

[0017]

In the pipe inner surface scale removing device according to any one of claims 1 to 3, the scale cleaning means for removing the scale on the inner surface of the pipe is a double length driving means composed of a combination of a parent beam, a child beam, a sprocket and a chain member. Since it was put into the pipe by using, the length of the entire device was shortened, and thus the installation space of the device could be saved. Further, since the child beam moves at a double speed with respect to the movement of the parent beam, the scale cleaning means can be moved at a high speed, which improves productivity, and further, the parent beam and the child beam can be moved by one motor. Has been simplified. Particularly, in the pipe inner surface scale removing device according to the third aspect, since the rotary drive source for driving the rotary brush provided at the tip of the child beam is provided at the base end of the chain member, Compared to the case where it is attached to the tip, it is not affected by dust, etc., and it is possible to obtain a long service life.

[Brief description of drawings]

1A and 1B are side views, partly omitted, showing an operating state of a pipe inner surface scale removing device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line P-P ′ in FIG.

FIG. 3 is a sectional view taken along the line Q-Q ′ in FIG.

4 (A) and 4 (B) are partially omitted side views of the operating state of the pipe inner surface scale removing device according to the second embodiment of the present invention.

FIG. 5 is an explanatory view of a pipe inner surface scale removing device according to a conventional example.

[Explanation of symbols]

 10 Pipe inner surface scale removing device 11 Base 12 Sprocket 13 Parent beam 14 Child beam 15 Link chain 16 Air nozzle for cleaning 17 Pipe 18 Guide 19 Guide 20 Receiving roller 21 Wheel 22 Pin rack 23 Bearing 24 Bearing 25 Drive shaft 26 Sprocket 27 Coupling 28 Driving motor 29 Support plate 30 Support plate 31 Horizontal shaft 32 Guide piece 33 Guide piece 34 Guide roller 35 Guide roller 36 Air supply hose 37 Guide roller 38 Roller conveyor 40 Pipe inner surface scale removing device 41 Rotating brush 42 Motor 43 Flexible shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eizo Uchiyama 46-59 Nakahara, Tobata-ku, Kitakyushu, Fukuoka Prefecture 59 Nittetsu Plant Design Co., Ltd. (72) Inventor Riyo Nakagawa 46, Nakahara, Tobata-ku, Kitakyushu, Fukuoka −59 Nippon Steel Co., Ltd., Machinery & Plant Division (72) Inventor Toshihiro Nagase 1321, Sanao, Kimitsu City, Chiba Prefecture 26 Sankyu Stock Company Dormitory

Claims (3)

[Claims] 1. A base which is arranged on one side of a pipe from which an inner scale is to be removed, and a base which is moved back and forth along a guide provided on the base and which has a horizontal axis on the base end side. Main beam with a sprocket, one end on the lower side is fixed to the base, and a chain member is engaged with the sprocket and folded back, and the other end on the upper side of the chain member is movably mounted on the main beam. A pipe inner surface scale removing device, comprising: a child beam having a base portion connected to a base, and a scale cleaning unit provided at a tip portion of the child beam. 2. The pipe inner surface scale removal according to claim 1, wherein the scale cleaning means includes a cleaning air nozzle, and an air supply hose connected to the cleaning air nozzle is piped along the chain member. apparatus. 3. The scale cleaning means comprises a rotary brush, a rotary drive source of which is provided at a base end of the chain member, and the rotary brush and the rotary drive source are arranged along the chain member. The pipe inner surface scale removing device according to claim 1, wherein the pipe inner surface scale removing device is connected via a flexible shaft.