JPS6328548A - Pipe inner face polishing device - Google Patents

Abstract

PURPOSE:To immediately discharge chips out of a pipe and polish the inside of said pipe uniformly and efficiency by using a rotary vane which is rotated by an air flow sent and fed from one direction inside said pipe and a gear mechanism, rotating first and second polishing members in the opposite directions to each other, and cleaningly polishing the inside of said pipe. CONSTITUTION:By using rotary vanes 2 which are rotated by the force of an air flow sent and fed from one direction A in a pipe 1 and a gear mechanism 22, a first and a second polishing members 15, 11 are rotated in the opposite directions to each other to cleaningly polish the inner face of the pipe 1. Thereby, even if one of the polishing members hits against an obstacle projected out inside the pipe stopping its rotation, the other polishing member is not affected by it and can be rotated at nearly twice the rotating speed hitherto, without producing unpolished part on the inner face of the pipe 1. The ground dust which are ground off can be discharged out of the pipe 1 by means of the air blow fed into the pipe 1, thereby, polishing the inner face of the pipe 1 uniformly and with high efficiency.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention pulls the inside of the pipe while holding it at approximately the center inside the pipe, rotates the rotary blades by the force of the wind supplied to the inside of the pipe, and drives a gear mechanism. The present invention relates to an apparatus for polishing the inner surface of a tube, in which the inner surface of the tube is polished uniformly and efficiently by rotating the first and second polishing members in opposite directions.

[Conventional technology]

Conventionally, as a method of polishing the inner surface of a pipe, whether it is an existing pipe or a new pipe, a polishing device equipped with a polishing member rotated by an electric motor is inserted into the pipe, and the polishing device is rotated at a predetermined speed. The inner surface of the tube can be polished by rotating a polishing member while being towed by a compressed gas, or the inner surface of the tube can be polished by blowing abrasive sand particles energized by compressed gas into the tube from one end of the tube and using the impact force of these abrasive sand particles. There are known ways to do this.

[Problem that the invention seeks to solve]

A device equipped with an abrasive member rotated by an electric motor,
When polishing the inner circumferential surface of the tube by pulling the inside of the tube,
There is a problem in that the rotation of the abrasive member is stopped due to an obstruction, such as a water tap, provided in the pipe. In addition, since the polishing member rotates only in a certain direction, it is often unable to contact the entire inner peripheral surface of the tube evenly (there is a problem that unpolished areas inevitably occur, and the polishing process After the polishing process is completed, there is a disadvantage that the abrasive debris left inside the tube must be discharged out of the tube using high-pressure water or compressed gas.

In addition, when using the method of using abrasive sand energized by compressed gas, a sand bot, a sand pumping device, etc. are required, which makes the entire device cumbersome, and the polishing cost becomes relatively high. be.

The present invention solves the problems associated with the conventional apparatus described above, and uses a rotary blade and a gear mechanism that are rotationally driven by the force of the wind supplied from one direction inside the pipe to respectively rotate the first and second polishing members. It is an object of the present invention to provide an apparatus for polishing the inner surface of a tube, which rotates in the opposite direction and polishes the inner surface of the tube evenly and very efficiently.

[Means for solving problems]

In detail, the present invention includes a rotary blade that is rotationally driven by the force of a calm air blown from one direction inside the pipe, a driven shaft whose axis is the same as the main axis of the rotary blade, and an outer peripheral portion of the driven shaft. a first abrasive member attached via a bearing to the first abrasive member;
a second polishing member fixed to the tip of the driven shaft at a predetermined distance from the polishing member; and a center holder that cooperates with the first polishing member to hold the entire device approximately in the center of the tube. and a gear for rotating the first polishing member in a direction opposite to the rotational direction of the rotary vane by the rotational driving force of the rotary vane, and rotating the second polishing member in the same direction as the rotary vane. Polishing the inner surface of a tube, characterized in that the first and second polishing members clean and polish the inner surface of the tube while pulling the entire device in a direction opposite to the flow direction of the wind. It is a device.

According to the apparatus of the present invention, the first and second polishing members rotate in opposite directions, so that the inner surface of the tube is polished very precisely, and one polishing member protrudes into the tube, for example. Even if the rotation stops due to hitting an obstacle such as a water faucet, the other polishing member is unaffected and can continue to rotate at almost double the previous rotation speed. In addition, the scraped abrasive debris is immediately discharged outside the tube by the flow of air that continues to be supplied inside the tube, and is removed separately after the polishing process as in the conventional method. This eliminates the need for discharge work.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the specific structure of the apparatus of this invention will be explained in detail based on the illustrated Example.

The drawing is a partial sectional view showing an embodiment of the device of the present invention,
In the figure, 1 indicates the pipe to be cleaned and polished.

Note that the pipe 1 may be a buried pipe or a non-barrier pipe.

Reference numeral 2 denotes a rotary vane that is rotationally driven by the force of wind supplied by a blower or the like from one direction within the pipe 1, and 3 indicates a main shaft located at the center of the rotary vane 2. Reference numeral 4 denotes a driven shaft that faces the main shaft 3 with a short distance therebetween, and the axial center of the driven shaft 4 is the same as that of the main shaft 3.

Reference numeral 5 designates a first polishing member attached to the outer periphery of the driven shaft 4 via a bearing 6 such as a ball bearing. In the case of the illustrated embodiment, the first polishing member 5 includes a base 7 fixed to the outer periphery of a bearing 6, an annular frame 9 supported by a support member 8 fixed to the base 7, and this frame. It consists of a VR brush 10 attached to the circumferential surface of the body 9.

11 indicates a second polishing member fixed to the tip of the driven shaft 4 at a predetermined distance from the first polishing member 5;
The second polishing member 11 includes a polishing brush 12 that expands outward due to centrifugal force.

13 is a center holder that cooperates with the first polishing member 5 to hold the entire device approximately at the center inside the tube 1;
The center holder 13 is rotatably attached to the tip of the main shaft 3 of the rotary blade 2 via a bearing 14 such as a ball bearing, and is fixed to the outer periphery of the bearing 14 similarly to the first polishing member 5. The polishing brush 18 is composed of a base 15 and an annular frame 17 supported by a support member 16 fixed to the base 15, and a polishing brush 18 is attached to the circumferential surface of the frame 17.

A center holder suppressor 21 is fixed to the front end of the center holder 13 and is rotatable by a thrust bearing 19 and includes a tow rope attachment 20.

22 rotates the first polishing member 5 in a direction opposite to the rotational direction of the rotary blade 2 by the rotational driving force of the rotary blade 2, and rotates the second polishing member 11 in the same direction as the rotary blade 2; The gear mechanism for this is shown. Gear mechanism 2
2 consists of a planetary gear 23 that meshes with a tooth groove provided on the outer periphery of the rear end of the main shaft 3, a gear 25 fixed to one end of the shaft 24 of this planetary gear 23, and an internal gear 26 that meshes with the planetary gear 23. , the internal gear 26 is mounted within the base 7 of the first polishing member 5, which is mounted on the outer periphery of the driven shaft 4 via a bearing 6. The base 7 provided with the internal gear 26 extends in the direction of the outer periphery of the main shaft 3, and also functions to support a bearing 27 attached to the outer periphery of the main shaft 3.

Gear 2 fixed to one end of shaft 24 of planetary gear 23
5 meshes with a tooth groove formed on the end of the driven shaft 4, so that the rotational force of the main shaft 3 is transmitted to the driven shaft 4 via the planetary gear 23, the shaft 24, and the gear 25.

Next, an example of the operation of the device of the present invention will be explained.

First, place this device inside the pipe 1 to be cleaned and polished,
An appropriate towing rope (not shown) is fastened to the mounting hardware 20 provided on the center holder suppressor 21, and the towing rope is pulled in the right direction in the drawing, and in the opposite direction to this pulling direction. That is, from the direction of drawing arrow A, tube 1
Air is supplied inside the pipe from a blower installed outside the pipe.

Then, the wind passes through the frame-shaped center holder 13 and hits the rotary blade 2, driving the rotary blade 2 to rotate in the right direction. The main shaft 3 also rotates due to the rotational drive of the rotary blade 2, and the planetary gear 23 meshing with the tooth groove of the main shaft 3 rotates to the left.

As described above, the planetary gear 23 meshes with the internal gear 26 provided in the base 7, so the rotational driving force of the planetary gear 23 causes the first polishing member 5 to rotate in the same left direction as the planetary gear 23. drive

On the other hand, the gear 25 fixed to one end of the shaft 24 of the planetary gear 23 meshes with a tooth groove carved in the end of the driven shaft 4, so the rotation of the main shaft 3 causes the driven shaft 4 to rotate in the right direction. Driven.

Then, the second polishing member 11 fixed to the tip of the driven shaft 4 is also rotationally driven in the right direction, and the polishing brush 12 provided on the second polishing member 11 expands outward due to the centrifugal force. Together with the Vr polishing brush 10 attached to the first polishing member 5, the inner peripheral surface of the tube 1 is cleaned and polished.

The entire apparatus is held approximately at the center within the tube 1 by the center holder 13 and the first polishing member 5, and is moved within the tube 1 at a predetermined speed by a pulling rope.

Note that there are no obstacles inside the tube 1, and the first polishing member 5
and the second polishing member 11 are rotated together, and the first polishing member 5 or the second polishing member 11 hits an obstacle such as a faucet protruding into the pipe 1. The following table shows the change in rotational speed when either of them is in contact and stopped.

In this way, when either one of the polishing members stops,
Since the other polishing member rotates at almost twice the speed of the previous rotation speed, even if one of the polishing members stops due to an obstacle, there is no problem such as non-gf areas forming on the inner surface of the tube. It is.

The abrasive debris scraped from the inner surface of the tube 1 is discharged outside the tube 1 by the flow of air that continues to be supplied inside the tube 1, and is prevented from dispersing by a water seal or the like provided outside the tube. .

〔Effect of the invention〕

As described above, when the device of the present invention is used, the first and second
The polishing members are rotated in opposite directions to polish the inner surface of the tube, so the polishing members can come into even contact with the inner surface of the tube, eliminating the conventional drawbacks such as non-polished areas on the inner surface of the tube. It is something that can be resolved. Also,
Even if one polishing member stops rotating, the other polishing member will continue to rotate without being affected, and the polishing debris scraped from the inner surface of the tube is instantly discharged outside the tube, making the work extremely efficient. It is something that can be done well.

[Brief explanation of drawings]

The drawing is a partial sectional view showing an embodiment of the device of the present invention. 1: Pipe 2: Rotating blade 3: Main shaft 4: Driven shaft 5: First polishing member 6: Bearing 7: Base 8: Supporting member 9: Frame body 10: Polishing brush 11: Second polishing member 12 : Polishing brush 13: Center holder 14 Biaxial bearing 15: Base 16: Support member 17; Frame body 18: Polishing brush 19 Ni-last bearing 20: Mounting hardware 21: Center holder suppressor

Claims (1)

[Claims] A rotary blade that is rotationally driven by the force of the wind supplied from one direction inside the pipe, a driven shaft whose axis is the same as the main axis of the rotary blade, and a second shaft that is attached to the outer periphery of the driven shaft via a bearing. A second polishing member fixed to the tip of the driven shaft at a predetermined distance from the first polishing member works together with the first polishing member to move the entire device into the pipe. a center holder held at approximately the center of the rotary blade, and a center holder that rotates the first polishing member in a direction opposite to the rotational direction of the rotary blade by the rotational driving force of the rotary blade;
and a gear mechanism for rotating the polishing member in the same direction as the rotary blade, and while pulling the entire device in the opposite direction to the flow direction of the wind, the inner surface of the tube is polished by the first and second polishing members. A polishing device for the inner surface of a tube, characterized in that it is configured to perform cleaning and polishing.