KR101875133B1

KR101875133B1 - Lubricant Painting Apparatus and Method of Pipe

Info

Publication number: KR101875133B1
Application number: KR1020170119679A
Authority: KR
Inventors: 최홍락
Original assignee: 주식회사 가나스틸
Priority date: 2017-09-18
Filing date: 2017-09-18
Publication date: 2018-07-05

Abstract

The pipe lubricant applying device of the present invention is a device for applying the liquid lubricant to the pipe to be expanded, Pipe The longitudinal center axis of the pipe while keeping the inclined state with respect to the horizontal plane A pipe rotator provided to be rotatable with respect to a reference; A stirrer configured to be able to move horizontally with respect to the pipe rotator while stirring water and a lubricant therein, and to recover lubricant oil flowing down from the pipe at a lower side of an inclined lower end of the pipe; A sprayer having a nozzle capable of receiving a lubricant solution supplied from the stirrer and spraying the lubricant solution to an inclined upper end of the pipe; And a blower installed in the nozzle for blowing air into the pipe so as to dry the lubricant applied to the inside of the pipe, wherein the pipe rotator is provided with a pipe at the center upper side of each pair of rollers And the upper roller pair and the lower roller pair disposed at predetermined intervals so as to be placed thereon, and the power of the driving motor is transmitted by using a universal joint connected to any one of the roller pairs, so that the pipe is rotated.

Description

Technical Field [0001] The present invention relates to a pipe lubricant applying apparatus and method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for applying a pipe lubricant, and more particularly, to a pipe lubricant applying apparatus and method for applying a lubricant for expanding a pipe inside at least 5 m or longer.

The production of a seamless stainless pipe is difficult because of the difficulty in manufacturing process as the diameter increases. Instead of making it directly to the desired diameter, the pipe produced with a relatively small diameter is expanded to the desired diameter through the expansion process It is more economical.

In order to perform the above-described expansion process, it is preferable that the mandrel is passed through the pipe while lubricant is applied to the inside of the pipe, thereby reducing the friction between the mandrel and the pipe.

Therefore, the lubricant applied in the pipe must be applied uniformly in the pipe, and such uniform lubricant application state must be stably maintained until the expansion process to the mandrel is performed, and the lubricant is applied only to the inside of the pipe, It should be minimized and the risk of safety accidents should be minimized in all processes.

It is to be understood that the foregoing description of the inventive concept is merely for the purpose of promoting an understanding of the background of the present invention and should not be construed as an admission that it is a prior art already known to those skilled in the art. Will be.

KR 10-2007-0055467 A

The present invention makes it possible to quickly and uniformly apply a lubricant to the inside of a pipe for expansion and to ensure that the uniform application state of the lubricant can be stably maintained until the expansion process by the mandrel is performed, And it is an object of the present invention to provide an apparatus and a method for applying a pipe lubricant which minimizes the loss of the lubricant and minimizes the risk of a safety accident during the application and fixing of the lubricant.

In order to accomplish the above object, the present invention provides a pipe lubricant applying device comprising: a pipe for applying a liquid lubricant to a pipe to be expanded, Pipe The longitudinal center axis of the pipe while maintaining the inclined state with respect to the horizontal plane A pipe rotator provided to be rotatable with respect to the reference; A stirrer for stirring the water and the lubricant therein and being horizontally movable with respect to the pipe rotator, the stirrer being located below the slanting lower end of the pipe and recovering lubricant flowing down from the pipe; A sprayer having a nozzle capable of receiving a lubricant solution supplied from the stirrer and spraying the lubricant solution to an inclined upper end of the pipe; And a blower blowing air into the pipe to dry the lubricant sprayed into the pipe from the nozzle,
The pipe rotator includes a pair of upper rollers and a pair of lower rollers arranged at regular intervals so that the pipes are placed on the center upper side of each pair of rollers with their own weight, and a universal joint connected to one of the roller pairs And the power of the driving motor is transmitted to rotate the pipe.

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Further, the stirrer may include: agitation passing through containing a lubricant and water; A pump installed in the stirring cylinder for sucking and discharging the lubricant and water; And a discharge pipe connected to the discharge side of the pump and discharging the lubricant solution discharged from the pump through the discharge holes into the stirring cylinder through at least two discharge ports; A lubricant supply pipe may be connected to the discharge side of the pump in parallel with the discharge pipe to transfer the lubricant solution to the injector.

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Wherein the injector is configured to be movable in a horizontal direction with respect to the pipe rotator; A flexible pipe hose is connected between the injector and the nozzle so that the position and the angle of the nozzle with respect to the injector can be freely adjusted; The blower may be installed in the injector.

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Wherein the blower is installed in a lift pipe inserted and raised in the injector; The injector may be provided with a fixing bolt to fix the elevated position of the elevating pipe to the injector.

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According to another aspect of the present invention, there is provided a method of applying a pipe lubricant, comprising the steps of placing a pipe to be expanded on an upper side of an upper side of a pair of upper and lower rollers constituting a pipe rotating machine, Placing the stirrer in the nozzle and positioning the nozzle of the injector near the sloped upper end of the pipe; A lubricant supply starting step of driving the stirrer to pump the lubricant solution to the nozzle of the injector; A lubricant applying step of injecting a lubricant solution into the upper end of a pipe rotating in an inclined state by using the nozzle while rotating the pipe by rotating the pair of rollers using the driving motor of the pipe rotator, ; And drying the lubricant applied to the inside of the pipe by blowing air into the upper end portion of the pipe while continuing to rotate the pipe after completing the lubricant application step.

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The present invention makes it possible to quickly and uniformly apply a lubricant to the inside of a pipe for expansion and to ensure that the uniform application state of the lubricant can be stably maintained until the expansion process by the mandrel is performed, So that the loss of the lubricant is minimized and the risk of the safety accident during the application of the lubricant is minimized.

1 is a structural view of a pipe lubricant applying device according to the present invention,
FIG. 2 is a view of the stirrer of FIG. 1 viewed from above,
Figure 3 shows the main part of the pipe rotator of Figure 1,
FIG. 4 is a view showing an example in which a blower is mounted on the injector of FIG. 1,
5 is a flow chart illustrating a method of applying a pipe lubricant according to the present invention.

1 to 4, the pipe lubricant applying device according to the present invention includes a pipe 1 to be rotated so that the pipe 1 can be rotated with respect to the longitudinal center axis while maintaining the inclined state with respect to the horizontal plane (3); And an agitator (not shown) which is configured to horizontally move with respect to the pipe rotator 3 and stirs water and a lubricant therein and recovers the lubricant flowing down from the pipe 1, which is located below the slanting lower end of the pipe 1 5); An injector (9) having a nozzle (7) capable of receiving a lubricant solution supplied from the stirrer (5) and injecting the lubricant solution into an inclined upper end of the pipe (1); And a blower 11 blown into the pipe 1 from the nozzle 7 to blow air into the pipe 1 to dry the applied lubricant.

That is, in the present invention, the lubricant solution is sprayed to the inside of the upper side of the pipe 1 with the nozzle 7 while rotating the pipe 1 in a state where the pipe 1 is mounted on the upper side of the pipe rotator 3, The lubricant is uniformly applied to the inner surface of the pipe 1 and the remaining lubricant flows back into the stirrer 5 to circulate the lubricant so that the lubricant can be quickly and uniformly applied to the inside of the pipe 1, The lubricant is applied only to the inside and the remaining lubricant is recovered so that the loss can be minimized.

Further, immediately after the application of the lubricant as described above, the uniform application state of the lubricant can be stably maintained until the expansion process by the mandrel is performed by the drying process by the blower 11. [

2, the stirrer 5 includes an agitating cylinder 13 containing a lubricant and water; A pump (15) installed in the stirring cylinder (13) for sucking and discharging the lubricant and water; And a discharge pipe (19) connected to the discharge side of the pump (15) for discharging the lubricant solution discharged by the pump (15) into the stirring cylinder (13) through at least two discharge ports (17) ; A lubricant supply pipe 21 is connected to the discharge side of the pump 15 in parallel with the discharge pipe 19 to transfer the lubricant solution to the injector 9.

2, the discharge pipe 19 preferably has a discharge port (not shown) which is disposed at a lower side of the inner center of the stirring barrel 13 and is capable of discharging the lubricant solution from the center of the stirring barrel 13 17 are provided at equal intervals on both sides of the discharge pipe 19 so that forced circulation of the lubricant solution through the entire inside of the agitating cylinder 13 can be made by a plurality of paths so that effective stirring of the lubricant and water .

In the stirring process of the lubricant solution as described above, even when the stirring of the lubricant is performed, there is substantially no solid movement such as a stirring blade in the stirring barrel 13, and only a flow of the purely liquid lubricant solution exists, There is an effect that it is possible to prevent the risk of the accident.

The stirrer 5 is provided with a wheel on its lower side and is movable in the horizontal direction with respect to the pipe rotator 3 so that when the pipes of various lengths are placed on the upper side of the pipe rotator 3, The stirrer 5 is easily positioned below the slant lower end of the pipe so that excess lubricant flowing out to the slanting lower end of the pipe when the lubricant is applied can be easily recovered to the agitator 5.

The injector 9 is provided with a wheel on its lower side and is movable in the horizontal direction with respect to the pipe rotator 3 so that even when pipes of various lengths are placed in the pipe rotator 3, It is possible to easily position the nozzle 7 and to further flexibly adjust the position and angle of the nozzle 7 with respect to the ejector 9, So that the angle and position of spraying the lubricant solution into the pipe 1 can be easily, quickly, and accurately adjusted by connecting with the pipe hose 23.

In the present embodiment, the blower 11 is installed together with the injector 9.

4, the blower 11 is installed in an elevating pipe 25 which is inserted into the injector 9 and is elevated and lowered, and the elevating pipe 25 is elevated and lowered with respect to the injector 9 And a fixing bolt 27 is provided on the injector 9 so as to fix the position where the nozzle is fixed.

Of course, the blower 11 may be elevated up and down with respect to the injector 9 by hydraulic pressure, or the blower 11 may be elevated with respect to the injector 9 by using a motor, a rack and a pinion.

The pipe rotator 3 is provided with an upper roller pair 29 and a lower roller pair 31. The pipe rotator 3 is provided with a pair of rollers 31, 3, the power of the drive motor 35 is supplied to one roller of the lower roller pair 31 by using the universal joint 33. In this embodiment, To provide power to rotate the pipe (1).

5, the pipe lubricant applying method according to the present invention for applying a lubricant to the inside of the pipe 1 using the pipe lubricant applying device constructed as described above,

The pipe 1 to be shrunk is inclined to the pipe rotator 3 and the stirrer 5 is positioned below the slanting lower end of the pipe and the nozzle of the injector 9 7; A lubricant supply start step (S20) for driving the agitator (5) to pump the lubricant solution to the nozzle (7) of the injector (9); A lubricant applying step of applying a lubricant by spraying the lubricant solution into the upper end of the rotating pipe 1 in an inclined state with the nozzle 7 while rotating the pipe 1 with the pipe rotator 3 S30); And a drying step (S40) for drying the applied lubricant by blowing air into the upper end portion while continuing to rotate the pipe (1) after the lubricant applying step (S30) is completed.

The pipe 1 to be expanded placed on the pipe rotator 3 is a stainless pipe for expanding its diameter through a cold expansion process. Since the stainless steel may cause corrosion by penetration of the carbon component on its component, the lubricant should use a lubricant (for example, a squeeze casting mold release agent) not containing a carbon component. This is to distinguish the lubricant used for expanding the conventional steel pipe from a carbon material such as graphite.

After the lubricant as described above is applied to the interior of the pipe to be expanded, the blower 11 is moved up and down with respect to the injector 9 so that the wind by the blower 11 flows into the upper end of the pipe The blower 11 is operated so that the lubricant applied inside the pipe flows to one side of the inside of the pipe 1 so that the lubricant can be dried without being clumped.

The lubricant applied to the inner side of the pipe at the time of contact with the mandrel used for expanding the pipe may be expanded to the entire inner diameter of the pipe, Thereby reducing the frictional force evenly, thereby helping to smoothly perform the pipe expanding process.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

One; pipe
3; Pipe rotator
5; agitator
7; Nozzle
9; Injector
11; air blower
13; Stirring bar
15; Pump
17; Outlet
19; Discharge pipe
21; Lubricant supply pipe
23; Flexible pipe hose
25; Lifting pipe
27; Fixing bolt
29; The upper roller pair
31; Lower roller pair
33; Universal joint
35; Drive motor
S10; Preparation phase
S20; Supply start phase
S30; Lubricant application step
S40; Drying step

Claims

So that the liquid lubricant flows along the inner surface of the pipe 1 to be expanded, Pipe (1) While keeping the inclined state with respect to the horizontal plane, the longitudinal center axis of the pipe 1 A pipe rotator (3) provided so as to be rotatable with respect to a reference;
And an agitator (3) configured to horizontally move with respect to the pipe rotator (3) while stirring the water and the lubricant therein and recovering the lubricating oil flowing down from the pipe (1) located below the slanting lower end of the pipe (5);
An injector (9) having a nozzle (7) capable of receiving a lubricant solution supplied from the stirrer (5) and injecting the lubricant solution into an inclined upper end of the pipe;
And a blower 11 blown into the pipe 1 from the nozzle 7 so as to blow air into the pipe 1 to dry the applied lubricant,
The pipe rotator 3 is provided with an upper roller pair 29 and a lower roller pair 31 arranged at regular intervals so that the pipe 1 is placed on the center upper side of each roller pair by its own weight, Wherein the power of the drive motor (35) is transmitted by using the universal joint (33) connected to any one of the rollers (3, 4) and the pipe (1).

The method according to claim 1,
The agitator (5)
An agitation cylinder 13 containing a lubricant and water;
A pump (15) installed in the stirring cylinder (13) for sucking and discharging the lubricant and water;
And a discharge pipe (19) connected to the discharge side of the pump (15) for discharging the lubricant solution discharged by the pump (15) into the stirring cylinder (13) through at least two discharge ports (17) ;
And a lubricant supply pipe (21) is connected to the discharge side of the pump (15) in parallel with the discharge pipe (19) to transfer the lubricant solution to the injector (9).

The method according to claim 1,
The injector (9) is configured to be movable in a horizontal direction with respect to the pipe rotator (3);
A flexible pipe hose 23 is connected between the injector 9 and the nozzle 7 so as to freely adjust the position and the angle of the nozzle 7 with respect to the injector 9;
Wherein the blower (11) is installed in the injector (9).

The method of claim 3,
The blower (11) is installed in an elevating pipe (25) which is inserted and raised in the injector (9);
Characterized in that the injector (9) is provided with a fixing bolt (27) so that the elevation pipe (25) can be fixed to the injector (9).

The pipe to be expanded is placed on the upper side of the center of the upper roller pair 29 and the lower roller pair 31 constituting the pipe rotator 3 to position the pipe to be expanded at an inclined position and the agitator (S10) for positioning the nozzle (7) of the injector (9) near the sloping upper end of the pipe;
A lubricant supply start step (S20) for driving the agitator (5) to pump the lubricant solution to the nozzle (7) of the injector (9);
A pipe for rotating the lubricant solution in an inclined state by using the nozzle 7 while rotating the one of the rollers 31 by rotating the roller by using the drive motor 35 of the pipe rotator 3, A lubricant applying step (S30) of injecting lubricant into the upper end portion of the lubricant applying unit (1);
After the lubricant application step S30 is completed, the drying step S40 of continuously blowing air into the upper end of the pipe 1 while continuously rotating the pipe 1 to dry the lubricant applied to the inside of the pipe 1, And applying a lubricant to the pipe lubricant.