Internal cleaning devices and systems for steel tube manufacturing

Abstract

An internal cleaning device for manufacturing a steel tube according to one aspect of the present invention may comprise a supply device that injects a cleaning solution into the interior of the steel tube, wherein one end of the steel tube is connected and configured in a bundle form according to size; a recovery device that recovers the cleaning solution used to clean the interior of the steel tube, wherein the other end of the steel tube is connected and configured in a bundle form according to size; and a storage device connected to the recovery device for distributing and storing the recovered cleaning solution.

Description

Technology Field

[0001] The present invention relates to an internal cleaning device and system for manufacturing steel tubes, and more specifically, to an internal cleaning device and system for manufacturing steel tubes capable of improving usability. Background Technology

[0003] Steel tubes are produced through a drawing process; due to their very narrow diameter and long length, cleaning the outer surface is easy, but cleaning the inner surface is very difficult.

[0004] Accordingly, it was common practice to clean finished steel tubes by immersing them in a degreasing solution to wash the outer surface while flowing the degreasing solution into the inner surface, and then, after a certain period of time, injecting high-pressure compressed air into the interior to discharge impurities such as drawing oil separated by the degreasing solution along with the degreasing solution.

[0005] However, there is a problem where impurities such as drawing oil deform into carbon and adhere over time, and as the diameter of the steel tube being produced increases, the passage speed and pressure of the high-pressure compressed air decrease accordingly, resulting in a problem where complete cleaning cannot be achieved. Prior art literature

[0007] Republic of Korea Registered Patent No. 10-1711550 (March 3, 2017) The problem to be solved

[0008] The present invention has been devised to solve the above-mentioned problems, and the objective of the present invention is to provide an internal cleaning device and system for manufacturing steel tubes that can improve usability. means of solving the problem

[0010] An internal cleaning device for manufacturing a steel tube according to one embodiment of the present invention for achieving the above-mentioned purpose may comprise a supply device that injects a cleaning solution into the interior of the steel tube, wherein one end of the steel tube is connected and configured in a bundle form according to size; a recovery device that recovers the cleaning solution used to clean the interior of the steel tube, wherein the other end of the steel tube is connected and configured in a bundle form according to size; and a storage device connected to the recovery device for distributing and storing the recovered cleaning solution.

[0011] The above supply device is provided with a main pipe that is cylindrical and receives a cleaning solution, a plurality of sub-pipes branching from the main pipe through which the cleaning solution moves, a plurality of branch pipes having one end connected to the sub-pipe and the other end equipped with a supply valve, and a supply hose having one end connected to the supply valve and the other end connected to the steel tube, wherein the branch pipes are provided in different sizes for each sub-pipe and are connected to the steel tubes according to their sizes through the supply hose, and the recovery device is provided with a recovery hose having one end connected to a recovery valve and the other end connected to the steel tube, a plurality of recovery pipes having one end equipped with the recovery valve and configured to correspond to the branch pipes to recover the cleaning solution moved through the recovery hose, a plurality of merging pipes connected to the plurality of recovery pipes to allow the cleaning solution recovered from the plurality of recovery pipes to merge, and a transfer pipe connected to the plurality of merging pipes to transfer the recovered cleaning solution to the reservoir, and the reservoir is connected to the transfer pipe and the recovered The apparatus may be equipped with a reservoir pipe through which a cleaning solution is transported, a distribution pipe branched from the reservoir pipe to distribute the recovered cleaning solution, and a drum connected to the distribution pipe to store the recovered cleaning solution.

[0012] The device may further be equipped with a resupply device that filters the recovered cleaning solution to enable reuse, and the resupply device may be equipped with a storage tank connected to the recovery device for storing the recovered cleaning solution, and a pump provided at the top of the storage tank for filtering contaminants from the cleaning solution stored in the storage tank and supplying it to the supply device.

[0013] The apparatus further comprises an auxiliary device connected to the supply device and the recovery device to apply pressure to a cleaning solution moving inside the steel tube, wherein the auxiliary device comprises an inlet block connected to the supply hose and the steel tube and positioned between the supply hose and the steel tube, a discharge block connected to the steel tube and the recovery hose and positioned between the steel tube and the recovery hose, and a pig that is introduced into the interior of the steel tube through the inlet block, applies pressure to the cleaning solution moving inside the steel tube, and is discharged through the discharge block, wherein the inlet block comprises an inlet pipe connected to the supply hose and the steel tube and communicating with the supply hose and the steel tube, an inlet extending from the inlet pipe into which the pig is introduced, a first opening / closing valve provided at the opening of the inlet port to open / close the interior of the inlet port, a first communication valve provided inside the inlet port to communicate or disconnect the inlet pipe and the inlet port, and a first communication valve provided inside the inlet port to communicate or disconnect the inlet pipe and the inlet port, and the The device is equipped with an inlet guide that guides the inlet of the pig, and the discharge block is equipped with a discharge pipe connected to the steel tube and the recovery hose and communicating with the steel tube and the recovery hose, a discharge port extending from the discharge pipe through which the pig is discharged, a second shut-off valve provided at the opening of the discharge port to open and close the interior of the discharge port, a second communication valve provided inside the discharge port to communicate with or disconnect the discharge pipe and the discharge port, and a discharge guide provided inside the discharge pipe to guide the discharge of the pig, and the pig is equipped with a body that is cylindrical and has the same size as the inner surface of the steel tube, a conical protruding head protruding from one side of the body, a propeller provided on the other side of the body that rotates, a motor provided inside the body to supply power to the propeller, and a battery provided inside the body to supply power to the motor, and the pig is equipped with the body according to the size of the steel tube.Pressure can be applied to the cleaning solution by receiving propulsion force from the above propeller.

[0014] The apparatus further comprises an auxiliary device connected to the supply device and the recovery device to apply pressure to a cleaning solution moving inside the steel tube, wherein the auxiliary device comprises an inlet block connected to the supply hose and the steel tube and positioned between the supply hose and the steel tube, a discharge block connected to the steel tube and the recovery hose and positioned between the steel tube and the recovery hose, and a pig that is introduced into the interior of the steel tube through the inlet block, applies pressure to the cleaning solution moving inside the steel tube, and is discharged through the discharge block, wherein the inlet block comprises an inlet pipe connected to the supply hose and the steel tube and communicating with the supply hose and the steel tube, an inlet extending from the inlet pipe into which the pig is introduced, a first opening / closing valve provided at the opening of the inlet port to open / close the interior of the inlet port, a first communication valve provided inside the inlet port to communicate or disconnect the inlet pipe and the inlet port, and a first communication valve provided inside the inlet port to communicate or disconnect the inlet pipe and the inlet port, and the The device is equipped with an inlet guide that guides the inlet of a pig, and the discharge block is equipped with a discharge pipe connected to the steel tube and the recovery hose and communicating with the steel tube and the recovery hose, a discharge port extending from the discharge pipe through which the pig is discharged, a second opening / closing valve provided at the opening of the discharge port to open / close the interior of the discharge port, a second communication valve provided inside the discharge port to communicate with or disconnect the discharge pipe and the discharge port, and a discharge guide provided inside the discharge pipe to guide the discharge of the pig, and the pig is equipped with a cylindrical body, a conical protruding head protruding from one side of the body, a propeller provided on the other side of the body to rotate, a motor provided inside the body to supply power to the propeller, a battery provided inside the body to supply power to the motor, and an internal space, and is provided in a form that surrounds the outer surface of the body and is fixed to the body.A pocket that expands by a cleaning solution introduced into the interior of the steel tube through the aforementioned inlet block and then into the interior space, an inlet hole formed in the pocket to allow the cleaning solution to flow into the interior space, and a frame provided inside the pocket and connected to the pocket to hold the pocket in a cylindrical shape when the pocket expands, and the pig can apply pressure to the cleaning solution by receiving propulsion force from the propeller after the cleaning solution flows into the interior space of the pocket and expands to fit the size of the steel tube.

[0015] Meanwhile, an internal cleaning system for manufacturing steel tubes according to one embodiment of the present invention for achieving the above-mentioned purpose comprises: a supply device that injects a cleaning solution into the interior of the steel tube, provided in a bundle form such that one end of the steel tube is connected and connected by size; a recovery device that recovers the cleaning solution used to clean the interior of the steel tube, provided in a bundle form such that the other end of the steel tube is connected and connected by size; and a storage device connected to the recovery device for distributing and storing the recovered cleaning solution. The supply device comprises a main pipe that is cylindrical and receives the cleaning solution, a plurality of sub-pipes branching from the supply pipe to move the cleaning solution, a plurality of branch pipes having one end connected to the sub-pipe and a supply valve at the other end, and a supply hose having one end connected to the valve and the other end connected to the steel tube. The branch pipes are provided in different sizes for each sub-pipe and are connected to the steel tubes according to size through the supply hose. The recovery device has one end connected to a recovery valve and the other end connected to the steel tube The apparatus may comprise a recovery hose connected to a tube, a plurality of recovery pipes having a recovery valve at one end and configured to correspond to the branch pipe to recover the cleaning solution moved through the recovery hose, a plurality of joining pipes connected to the plurality of recovery pipes to allow the cleaning solution recovered from the plurality of recovery pipes to join, and a transfer pipe connected to the plurality of joining pipes to transfer the recovered cleaning solution to the reservoir, wherein the reservoir may comprise a reservoir pipe connected to the transfer pipe to transfer the recovered cleaning solution, a distribution pipe branched from the reservoir pipe to distribute the recovered cleaning solution, and a drum connected to the distribution pipe to store the recovered cleaning solution. Effects of the invention

[0017] According to the internal cleaning device and system for manufacturing steel tubes according to the present invention, usability can be improved. Brief explanation of the drawing

[0019] FIG. 1a is a conceptual diagram showing an internal cleaning device and system for manufacturing steel tubes according to one embodiment of the present invention. FIGS. 1B to 1D are drawings showing an internal cleaning device and system for manufacturing steel tubes as illustrated in FIG. 1A. FIG. 1e is an equipment drawing showing an internal cleaning device and system for manufacturing steel tubes as illustrated in FIG. 1a to 1d. FIG. 1f is an equipment drawing showing a modified example of an internal cleaning device and system for manufacturing steel tubes shown in FIG. 1e. FIG. 2 is a drawing showing an auxiliary device equipped in an internal cleaning device and system for manufacturing steel tubes shown in FIG. 1a to 1d. FIG. 3 is a drawing showing the pig of the auxiliary device illustrated in FIG. 2. FIGS. 4 to 6 are drawings showing examples of variations of the pig shown in FIG. 3. Specific details for implementing the invention

[0020] Hereinafter, an internal cleaning device and system for manufacturing steel tubes according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0022] FIG. 1a is a conceptual diagram showing an internal cleaning device and system for manufacturing a steel tube according to one embodiment of the present invention, FIG. 1b to 1d are drawings showing an internal cleaning device and system for manufacturing a steel tube shown in FIG. 1a, FIG. 1e is an equipment drawing showing an internal cleaning device and system for manufacturing a steel tube shown in FIG. 1a to 1d, and FIG. 1f is an equipment drawing showing a modified example of an internal cleaning device and system for manufacturing a steel tube shown in FIG. 1e.

[0023] Referring to FIGS. 1a to 1f, an internal cleaning device (10) and system for manufacturing a steel tube according to one embodiment of the present invention may be provided to dissolve carbon that has deformed and solidified over time in the steel tube (20) during the drawing process when manufacturing the steel tube (20) and discharge it to the outside, and may include a supply device (100) which is provided in a bundle form so that one end of the steel tube (20) is connected and connected by size and injects a cleaning solution into the steel tube (20), a recovery device (200) which is provided in a bundle form so that the other end of the steel tube (20) is connected and connected by size and recovers the cleaning solution that has cleaned the inside of the steel tube (20), and a storage device (300) connected to the recovery device (200) to distribute and store the recovered cleaning solution.

[0024] The supply device (100) is provided with a main pipe (110) that is cylindrical and receives a cleaning solution, and a plurality of sub-pipes (120) that branch off from the main pipe (110) and through which the cleaning solution moves. The sub-pipes (120) are provided in a form that protrudes horizontally from the outer surface of the main pipe (110), and it is preferable to have four of them in the left, right, up, and down directions, but is not limited thereto.

[0025] Each subpipe (120) is provided with a plurality of branch pipes (140) at regular intervals, one end of which is connected to the subpipe (120) and the other end of which is equipped with a supply valve (130), and the supply valve (130) may be equipped with a supply hose (150) connected to a steel tube (20).

[0026] The supply valve (130) serves to prevent the supply of the cleaning solution from being unnecessarily supplied when work such as temporarily stopping the movement of the cleaning solution or connecting the supply hose (150) is in progress, and the supply hose (150) can add flexibility in connecting the branch pipe (140) and the steel tube (20).

[0027] Here, the branch pipe (140) is provided with different sizes for each sub-pipe (120), that is, different diameters corresponding to different diameters of the steel tube (20), so that the steel tube (20) of various sizes and the branch pipe (140) can be easily connected to each other, thereby improving usability.

[0028] The cleaning solution can be supplied through the main pipe (110), moved to the sub-pipe (120), and then simultaneously supplied to steel tubes (20) of different sizes through the branch pipe (140) and the supply hose (150).

[0029] Meanwhile, the recovery device (200) may be provided with a recovery hose (220) having one end connected to a recovery valve (210) and the other end connected to a steel tube (20), a plurality of recovery pipes (230) having a recovery valve (210) at one end and configured to correspond to a branch pipe (140) to recover the cleaning solution moved through the recovery hose (220), a plurality of joining pipes (240) connected to the plurality of recovery pipes (230) to allow the cleaning solution recovered from the plurality of recovery pipes (230) to join, and a moving pipe (250) connected to the plurality of joining pipes (240) to move the recovered cleaning solution to a water storage device (300).

[0030] The recovery valve (210) serves to temporarily stop the recovery of the cleaning solution, and the recovery hose (220) can add flexibility in connecting the steel tube (20) and the recovery pipe (230).

[0031] The recovery pipe (230), like the branch pipe (140), is provided with different diameters corresponding to various diameters of the steel tube (20) so that it can be easily connected to steel tubes (20) of various sizes.

[0032] After cleaning the inside of the steel tube (20), the cleaning solution is simultaneously recovered through the recovery hose (220) and the recovery pipe (230), joined to the confluence pipe (240), and can be moved to the water storage device (300) through the transfer pipe (250).

[0033] Meanwhile, the water storage device (300) may be equipped with a water storage pipe (310) connected to a moving pipe (250) through which the recovered cleaning solution is moved, a distribution pipe (320) branched from the water storage pipe (310) to distribute the recovered cleaning solution, and a drum (330) connected to the distribution pipe (320) through which the recovered cleaning solution is stored.

[0034] Between the distribution pipe (320) and the drum (330), a water storage valve (not labeled) and a water storage hose (not labeled) are provided so that the cleaning solution can be easily stored even if the position of the drum (330) is changed, and the recovered cleaning solution can be prevented from being ejected to the outside when the drum (330) is replaced.

[0035] Meanwhile, the internal cleaning device (10) and system for manufacturing a steel tube according to one embodiment of the present invention may further be provided with a re-supply device (400) that filters the recovered cleaning solution to enable reuse.

[0036] The resupply device (400) is connected to the supply device (100), the recovery device (200), and the water storage device (300), respectively, and may be equipped with a water storage tank (410) and a pump (420).

[0037] The water storage tank (410) is connected to the recovery device (200) and serves to store the recovered cleaning solution, and the pump (420) is provided at the top of the water storage tank (410) so that the cleaning solution stored in the water storage tank (410) can be resupplied to the supply device (100).

[0038] Here, the pump (420) is equipped with a filter (not shown) that filters contaminants from the cleaning solution stored in the water tank (410), so that the cleaning solution from which contaminants have been removed can be supplied back to the supply device (100).

[0039] And, by performing operations such as replacing the original cleaning solution supplied to the supply device (100) while the recovered cleaning solution is being resupplied, the supply, recovery, and reuse of the cleaning solution can be made easy.

[0040] Next, an internal cleaning device (10) for manufacturing a steel tube and an auxiliary device (500) provided in the system according to one embodiment of the present invention will be described. In the following description, only parts that differ from the above-described embodiment will be described in detail, and detailed descriptions of parts that are identical or extremely similar will be omitted.

[0042] FIG. 2 is a drawing showing an auxiliary device equipped in an internal cleaning device and system for manufacturing steel tubes shown in FIG. 1a to 1d, and FIG. 3 is a drawing showing a pig of the auxiliary device shown in FIG. 2.

[0043] Referring to FIGS. 1a to 3, an internal cleaning device (10) and system for manufacturing a steel tube according to one embodiment of the present invention may further include an auxiliary device (500) connected to a supply device (100) and a recovery device (200) to apply pressure to a cleaning solution moving inside a steel tube (20).

[0044] Due to the characteristics of the steel tube (20) which is manufactured in a long, slender shape, a large flow rate and high pressure of the cleaning solution are required. The auxiliary device (500) can improve usability by applying pressure to the cleaning solution moving inside the steel tube (20) to increase cleaning efficiency.

[0045] To this end, the auxiliary device (500) is equipped with an inlet block (510) connected to the supply hose (150) and the steel tube (20) and positioned between the supply hose (150) and the steel tube (20), a discharge block (520) connected to the steel tube (20) and the recovery hose (220) and positioned between the steel tube (20) and the recovery hose (220), and a pig (530). The pig (530) is introduced into the interior of the steel tube (20) through the inlet block (510), moves along the interior of the steel tube (20), and is discharged to the outside of the steel tube (20) through the discharge block (520), and can serve to apply pressure to the cleaning solution while moving along the interior of the steel tube (20).

[0046] The inlet block (510) is connected to the supply hose (150) and the steel tube (20) through various connection methods and may be equipped with an inlet pipe (511) connected to the supply hose (150) and the steel tube (20) and communicating with the supply hose (150) and the steel tube (20), an inlet port (512) extending from the inlet pipe (511) to allow the pig (530) to be introduced, a first opening / closing valve (513) provided at the opening of the inlet port (512) to open / close the interior of the inlet port (512), a first connecting valve (514) provided inside the inlet port (512) to connect or disconnect the inlet pipe (511) and the inlet port (512), and an inlet guide (515) provided inside the inlet pipe (511) to guide the introduction of the pig (530).

[0047] The inlet pipe (511) is manufactured with an inner diameter the same size as the supply hose (150) and the steel tube (20) to allow the cleaning solution to move smoothly, and the inlet port (512) has an inner diameter that is a predetermined size larger than that of the inlet pipe (511) and can be extended outward at a certain angle from one end where the steel tube (20) is connected.

[0048] The first shut-off valve (513) serves to open or close the inlet (512) itself, and the first connecting valve (514) serves to connect or disconnect the inlet pipe (511) and the inlet (512). By opening or closing the first shut-off valve (513) and the first connecting valve (514), the pig (530) can be introduced from the inlet (512) into the inlet pipe (511).

[0049] The pig (530) is located inside the inlet (512) when the first shut-off valve (513) is open and the first connecting valve (514) is closed, and the space where the pig (530) is located is closed by closing the first shut-off valve (513), and the pig (530) can be introduced into the inlet pipe (511) by opening the first connecting valve (514).

[0050] At this time, the pig (530) can be guided by the inlet guide (515) and inserted into the inlet pipe (511) in a sliding manner, and the inlet guide (515) can be provided in various forms such as a plate with perforated holes, a mesh form, or a fence form so as not to obstruct the movement of the cleaning solution.

[0051] Meanwhile, the discharge block (520) is connected to the steel tube (20) and the recovery hose (220) through various connection methods, similar to the inlet block (510), and may be equipped with a discharge pipe (521) connected to the steel tube (20) and the recovery hose (220) and communicating with the steel tube (20) and the recovery hose (220), a discharge port (522) extending from the discharge pipe (521) through which a pig (530) is discharged, a second opening / closing valve (523) provided at the opening of the discharge port (522) to open / close the interior of the discharge port (522), a second connecting valve (524) provided inside the discharge port (522) to connect or disconnect the discharge pipe (521) and the discharge port (522), and a discharge guide (525) provided inside the discharge pipe (521) to guide the discharge of the pig (530).

[0052] The discharge pipe (521) is manufactured with an inner diameter the same size as the recovery hose (220) and the steel tube (20) to allow the cleaning solution to move smoothly, and the discharge port (522) has an inner diameter that is larger than the discharge pipe (521) and can be extended outward at a certain angle from one end where the steel tube (20) is connected.

[0053] The second shut-off valve (523) serves to open or close the discharge port (522) itself, and the second connecting valve (524) serves to connect or disconnect the discharge pipe (521) and the discharge port (522). By opening or closing the second shut-off valve (523) and the second connecting valve (524), the pig (530) can be discharged from the discharge pipe (521) to the discharge port (522).

[0054] The pig (530) is located inside the discharge port (522) when the second connecting valve (524) is open and the second opening / closing valve (523) is closed, and the space where the pig (530) is located can be closed by closing the second connecting valve (524) and the pig (530) can be discharged out of the discharge port (522) by opening the second opening / closing valve (523).

[0055] At this time, the pig (530) can be guided by the discharge guide (525) and discharged from the discharge pipe (521) to the discharge port (522) in a sliding manner, and the discharge guide (525) can be provided in various forms such as a plate with perforated holes, a mesh form, or a fence form so as not to obstruct the movement of the cleaning solution.

[0056] In one embodiment of the present invention, the inlet guide (515) and the discharge guide (525) are shown to be plate-shaped, but the inlet guide (515) and the discharge guide (525) are provided in a shape bent at a certain angle along the direction of movement of the pig (530) so that they can be easily moved from the inlet block (510) to the steel tube (20) and from the steel tube (20) to the discharge block (520), and the pig (530) can be easily moved through various other methods.

[0057] Meanwhile, the pig (530) may be provided in a cylindrical shape and may be provided with a body (531) that is provided in the same size as the inner surface of the steel tube (20) according to the size of the steel tube (20), a conical protruding head (532) protruding from one side of the body (531), a propeller (533) that rotates provided on the other side of the body (531), a motor (534) that supplies power to the propeller (533) provided inside the body (531), and a battery (535) that supplies power to the motor (534) provided inside the body (531).

[0058] Various methods may be applied to the conical protruding head (532), such as forming a groove (not shown) on the upper side or forming the upper side steeper than the lower side so that the pig (530) can easily move from the inlet block (510) to the steel tube (20) and from the steel tube (20) to the discharge block (520).

[0059] The pig (530) can move along the inside of the steel tube (20) while being fitted into the inner surface of the steel tube (20) by receiving propulsion through its own power source (535), motor (534), and propeller (533), and can increase cleaning efficiency by applying pressure from the direction of the supply device (100) to the direction of the recovery device (200) to the cleaning solution moving inside the steel tube (20).

[0060] Next, a modified example of the pig (530) mentioned above will be described. In the following description, only the parts that differ from the above-described embodiment will be described in detail, and detailed descriptions of identical or extremely similar parts will be omitted.

[0062] FIGS. 4 to 6 are drawings showing examples of variations of the pig illustrated in FIG. 3.

[0063] Referring to FIGS. 1a through 6, the pig (530) may have a cylindrical body (531), a conical protruding head (532) protruding from one side of the body (531), a propeller (533) provided on the other side of the body (531) and rotating, a motor (534) provided inside the body (531) and supplying power to the propeller (533), a battery (535) provided inside the body (531) and supplying power to the motor (534), a pocket (536) provided in a shape that surrounds the outer surface of the body (531) and is fixed to the body (531) and has an internal space, an inlet hole (537) formed in the pocket (536) and allowing a cleaning solution to flow into the internal space, and a frame (538) provided inside the pocket (536).

[0064] The pocket (536) is provided in a long cylindrical shape from the protruding head (532) toward the propeller (533), and its outer surface is provided in the shape of a corrugated tube so that the internal space can expand or contract. It expands when a cleaning solution is introduced into the internal space through the inlet hole (537) after the pig (530) is introduced into the interior of the steel tube (20) through the inlet block (510), and it contracts when a cleaning solution is drained from the internal space through the inlet hole (537) after the pig (530) is discharged to the outside of the steel tube (20) through the discharge block (520).

[0065] Accordingly, the pig (530) expands to fit the size of the steel tube (20) and remains stuck inside the steel tube (20), and by receiving propulsion force through self-powered power from the battery (535), motor (534) and propeller (533) and moving along the inside of the steel tube (20), it can apply pressure from the direction of the supply device (100) to the direction of the recovery device (200) to the cleaning solution moving inside the steel tube (20), thereby increasing the cleaning efficiency.

[0066] Meanwhile, the frame (538) is connected to the pocket (536) and serves to hold the pocket (536) in a cylindrical shape when the pocket (536) expands, and conversely, when the pocket (536) contracts, it prevents it from shrinking below a certain size and prevents the inlet hole (537) from being covered by the contracted pocket (536).

[0068] Although an internal cleaning device and system for manufacturing steel tubes according to one embodiment of the present invention have been described above, the scope of the present invention is not limited to the embodiments presented in this specification. Furthermore, those skilled in the art who understand the scope of the present invention may easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same concept, and such embodiments shall also be considered to fall within the scope of the present invention. Explanation of the symbols

[0070] 10: Internal cleaning device for steel tube manufacturing 20: Steel tube 100: Supply device 110: Main pipe 120: Sub pipe 130: Supply valve 140: Branch pipe 150: Supply hose 200: Recovery device 210: Return valve 220: Return hose 230: Recovery pipe 240: Joining pipe 250: Moving pipe 300: Water reservoir 310: Water reservoir pipe 320: Distribution pipe 330: Drum 400: Refill device 410: Water storage tank 420: Pump 500: Auxiliary device 510: Inlet block 511: Inlet pipe 512: Inlet 513: First shut-off valve 514: First connecting valve 515: Withdrawal Guide 520: Discharge Block 521: Discharge pipe 522: Discharge outlet 523: Second shut-off valve 524: Second connecting valve 525: Discharge Guide 530: Pig 531: Body 532: Protruding head 533: Propeller 534: Motor 535: Battery 536: Pocket 537: Inflow hole 538: Framework

Claims

Claim 1 A supply device for injecting a cleaning solution into the interior of a steel tube, wherein one end of the steel tube is connected and arranged in a bundle form according to size; a recovery device for recovering the cleaning solution that has cleaned the interior of the steel tube, wherein the other end of the steel tube is connected and arranged in a bundle form according to size; and a storage device connected to the recovery device for distributing and storing the recovered cleaning solution. The supply device is provided with a main pipe that receives the cleaning solution and is provided in a cylindrical shape; a plurality of sub-pipes branching from the main pipe through which the cleaning solution moves; a plurality of branch pipes, each having one end connected to the sub-pipe and a supply valve at the other end; and a supply hose, each having one end connected to the supply valve and the other end connected to the steel tube. The branch pipes are provided in different sizes for each sub-pipe and are connected to the steel tube according to size through the supply hose. The recovery device is provided with a recovery hose, one end connected to a recovery valve and the other end connected to the steel tube, and the recovery valve is provided at one end. The apparatus comprises a plurality of recovery pipes configured to correspond to a branch pipe and through which a cleaning solution moved through the recovery hose is recovered, a plurality of joining pipes connected to the plurality of recovery pipes to allow the cleaning solution recovered from the plurality of recovery pipes to merge, and a transfer pipe connected to the plurality of joining pipes to transfer the recovered cleaning solution to the reservoir, wherein the reservoir comprises a reservoir pipe connected to the transfer pipe through which the recovered cleaning solution is transferred, a distribution pipe branched from the reservoir pipe to distribute the recovered cleaning solution, and a drum connected to the distribution pipe to store the recovered cleaning solution, and further comprises an auxiliary device connected to the supply device and the recovery device to apply pressure to the cleaning solution moving inside the steel tube, wherein the auxiliary device comprises an inlet block connected to the supply hose and the steel tube and positioned between the supply hose and the steel tube, andThe apparatus comprises a discharge block connected to the steel tube and the recovery hose and positioned between the steel tube and the recovery hose, and a pig that is introduced into the interior of the steel tube through the inlet block, applies pressure to a cleaning solution moving inside the steel tube, and is discharged through the discharge block; the inlet block comprises an inlet pipe connected to the supply hose and the steel tube and communicating with the supply hose and the steel tube, an inlet extending from the inlet pipe into which the pig is introduced, a first opening / closing valve provided at the opening of the inlet port to open / close the interior of the inlet port, a first communication valve provided inside the inlet port to communicate or disconnect the inlet pipe and the inlet port, and an inlet guide provided inside the inlet pipe to guide the introduction of the pig; and the discharge block comprises a discharge pipe connected to the steel tube and the recovery hose and communicating with the steel tube and the recovery hose, and a discharge pipe extending from the discharge pipe into which the pig is discharged The device comprises a discharge port, a second opening / closing valve provided at the opening of the discharge port to open / close the interior of the discharge port, a second connecting valve provided inside the discharge port to connect or disconnect the discharge pipe and the discharge port, and a discharge guide provided inside the discharge pipe to guide the discharge of the pig, wherein the pig comprises a cylindrical body, a conical protruding head protruding from one side of the body, a propeller provided on the other side of the body to rotate, a motor provided inside the body to supply power to the propeller, a battery provided inside the body to supply power to the motor, an internal space, a pocket provided in a shape that surrounds the outer surface of the body and is fixed to the body, which expands by a cleaning solution flowing into the internal space after being introduced into the interior of the steel tube through the inlet block, an inlet hole formed in the pocket to allow the cleaning solution to flow into the internal space, and provided inside the pocket,An internal cleaning device for manufacturing a steel tube, comprising a frame connected to the pocket and supporting the pocket so that its shape becomes cylindrical when the pocket expands, wherein the pig receives a cleaning solution into the internal space of the pocket, expands to fit the size of the steel tube, and then applies pressure to the cleaning solution by receiving propulsion force from the propeller. Claim 2 delete Claim 3 An internal cleaning device for manufacturing steel tubes according to claim 1, further comprising a resupply device that filters the recovered cleaning solution to enable reuse, wherein the resupply device comprises a storage tank connected to the recovery device for storing the recovered cleaning solution, and a pump provided at the top of the storage tank for filtering contaminants from the cleaning solution stored in the storage tank and supplying it to the supply device. Claim 4 delete Claim 5 delete Claim 6 A supply device for injecting a cleaning solution into the interior of a steel tube, wherein one end of the steel tube is connected and arranged in a bundle form according to size; a recovery device for recovering the cleaning solution that has cleaned the interior of the steel tube, wherein the other end of the steel tube is connected and arranged in a bundle form according to size; and a storage device connected to the recovery device for distributing and storing the recovered cleaning solution. The supply device is provided with a main pipe that receives the cleaning solution and is provided in a cylindrical shape, a plurality of sub-pipes branching from the main pipe through which the cleaning solution moves, a plurality of branch pipes having one end connected to the sub-pipes and a supply valve at the other end, and a supply hose having one end connected to the supply valve and the other end connected to the steel tube. The branch pipes are provided in different sizes for each sub-pipe and are connected to the steel tube according to size through the supply hose. The recovery device is provided with a recovery hose having one end connected to a recovery valve and the other end connected to the steel tube, and the recovery valve is provided at one end. The apparatus comprises a plurality of recovery pipes configured to correspond to the branch pipes and through which a cleaning solution moved through the recovery hose is recovered, a plurality of merging pipes connected to the plurality of recovery pipes to allow the cleaning solution recovered from the plurality of recovery pipes to merge, and a transfer pipe connected to the plurality of merging pipes to transfer the recovered cleaning solution to the reservoir, wherein the reservoir comprises a reservoir pipe connected to the transfer pipe through which the recovered cleaning solution is transferred, a distribution pipe branched from the reservoir pipe to distribute the recovered cleaning solution, and a drum connected to the distribution pipe to store the recovered cleaning solution, and further comprises an auxiliary device connected to the supply device and the recovery device to apply pressure to the cleaning solution moving inside the steel tube, wherein the auxiliary device comprises an inlet block connected to the supply hose and the steel tube and located between the supply hose and the steel tube, and a discharge block connected to the steel tube and the recovery hose and located between the steel tube and the recovery hose.The apparatus comprises a pig that is introduced into the interior of the steel tube through the inlet block, applies pressure to a cleaning solution moving inside the steel tube, and is discharged through the discharge block; the inlet block comprises an inlet pipe connected to the supply hose and the steel tube and communicating with the supply hose and the steel tube, an inlet extending from the inlet pipe into which the pig is introduced, a first opening / closing valve provided at the opening of the inlet port to open / close the interior of the inlet port, a first communication valve provided inside the inlet port to communicate or disconnect the inlet pipe and the inlet port, and an inlet guide provided inside the inlet pipe to guide the introduction of the pig; and the discharge block comprises a discharge pipe connected to the steel tube and the recovery hose and communicating with the steel tube and the recovery hose, a discharge port extending from the discharge pipe into which the pig is discharged, and a valve provided at the opening of the discharge port to open / close the interior of the discharge port. The device comprises a second shut-off valve, a second connecting valve provided inside the discharge port to connect or disconnect the discharge pipe and the discharge port, and a discharge guide provided inside the discharge pipe to guide the discharge of the pig, wherein the pig comprises a cylindrical body, a conical protruding head protruding from one side of the body, a propeller provided on the other side of the body to rotate, a motor provided inside the body to supply power to the propeller, a battery provided inside the body to supply power to the motor, an internal space, a pocket provided in a shape that surrounds the outer surface of the body and is fixed to the body, which is introduced into the interior of the steel tube through the inlet block and expands by a cleaning solution introduced into the internal space, an inlet hole formed in the pocket to allow the cleaning solution to flow into the internal space, and a frame provided inside the pocket and connected to the pocket to hold the pocket in a cylindrical shape when the pocket expands.The above pig is an internal cleaning system for manufacturing steel tubes in which a cleaning solution flows into the internal space of the pocket, expands to fit the size of the steel tube, and then receives propulsion force from the propeller to apply pressure to the cleaning solution.

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