Cleaning apparatus for steel pipe and cleaning method using the same

Abstract

The present invention relates to a cleaning device (100) for cleaning the inner surface of a steel pipe (10) buried underground by spraying dry ice, comprising: a main body; a main body driving unit (110) installed to drive the main body inside the steel pipe (10); a storage unit (120) installed at the rear of the main body to store dry ice; a supply unit (130) installed in the main body to supply dry ice from the storage unit (120); a spray pipe (140) installed at the front of the main body to receive dry ice from the supply unit (130); a spray pipe driving unit (141) installed in the main body to rotate the spray pipe (140) along the inner circumference of the steel pipe (10); a spray unit (142) installed at the end of the spray pipe (140) to spray dry ice onto the inner surface of the steel pipe (10); and a length adjustment unit (150) for adjusting the length of the spray pipe (140). A cleaning device (100) for a steel pipe is provided, characterized by including a control unit (160) that controls the main body driving unit (110), the spray pipe driving unit (141), and the length adjustment unit (150) so that when the main body drives the inside of the steel pipe (10), the distance between the spray unit (142) and the steel pipe (10) is maintained within a certain range despite changes in the curvature of the steel pipe (10) and rotation of the spray pipe (140). This allows the cleaning efficiency to be increased by maintaining the distance between the end of the spray pipe and the steel pipe within a certain range despite changes in the curvature of the steel pipe and rotation of the spray pipe.

Description

Technology Field

[0001] The present invention relates to the field of construction technology, and more specifically, to a cleaning device for steel pipes buried underground and a cleaning method using the same. Background Technology

[0002] Underground pipes, such as water pipes, sewer pipes, gas pipes, and communication pipes, are damaged due to structural aging, ground subsidence, fluctuations in soil pressure above ground, and cracks and breakage caused by external loads.

[0003] This not only degrades the performance of the pipeline but also causes wastewater leaking through damaged sections to seep underground, contaminating the soil or causing ground erosion; therefore, efficient repair of damaged underground pipelines is required.

[0004] A rehabilitation method (pipeline repair method) in which a lining is attached to the inner surface of underground pipelines by inversion is widely used for repair.

[0005] This refers to a method of attaching a liner to the inner surface of a pipe by inverting a liner impregnated with a curable resin (or a liner attached with a thermoplastic resin) into the pipe by means of fluid pressure, applying pressure to the inverted liner on the inner surface of the pipe, and curing the curable resin by heating while maintaining the pressurized state (or recrystallizing the thermoplastic resin by melting).

[0006] Figures 1 to 7 are process diagrams of a conventional steel pipe rehabilitation method.

[0007] A pair of work ports (11) connected to the underground steel pipe (10) to be repaired are secured. (Figs. 1, 2)

[0008] The inner wall of the steel pipe (10) is cleaned by a cleaning device (20), using a cleaning agent supplied from an abrasive supply unit (21) and a dry ice supply unit (22). (Figs. 3, 4)

[0009] After the cleaning operation is completed, a heater (30) capable of operating inside the steel pipe (10) is installed, and a liner supply roller (40) is installed in the work opening (11). (Fig. 5)

[0010] When the liner (200) is supplied into the steel pipe (10) through the liner supply roller (40) in the liner loading and supply device (A), the liner (200) is inverted and pressurized by the pressurizing device (50) and pressed against the inner surface of the steel pipe (10). (Fig. 6)

[0011] As the liner (200) advances by supplying it inside the steel pipe (10), the heater (30) moves backward at a certain distance from the front of the liner (200), thereby attaching the liner (200) by heating. (Fig. 7)

[0013] These conventional methods had the following problems.

[0014] Steel pipes buried underground take on a curved structure rather than a straight one due to ground subsidence and various other causes.

[0015] Due to the change in curvature of the steel pipe, the distance between the end of the spray pipe (23) of the cleaning device (20) and the inner surface of the steel pipe (10) continuously changes.

[0016] If the distance is too far, the cleaning intensity becomes weak, and if the distance is too close, there is a problem of damage caused by contact with the steel pipe (10) or spray pipe (23).

[0017] Therefore, in the past, in order to prevent damage, the distance between the end of the spray pipe (23) of the cleaning device (20) and the inner surface of the steel pipe (10) was uniformly set long, so there is a problem that the cleaning efficiency is not good.

[0019] The drawing symbols of the above prior art are limited only to the description of the said prior art. Prior art literature

[0020] (Patent Document 0001) KR 10-2302235 B1(Patent Document 0002) KR 10-2021-0102682 A(Patent Document 0003) KR 10-2112012 B1(Patent Document 0004) KR 10-2012-0104063 A The problem to be solved

[0021] The present invention was developed to solve the aforementioned problems, and aims to provide a cleaning device for steel pipes buried underground and a cleaning method using the same, which can increase cleaning efficiency by maintaining the distance between the end of the spray pipe and the steel pipe within a certain range, regardless of changes in the curvature of the steel pipe and the rotation of the spray pipe. means of solving the problem

[0022] To solve the above problem, the present invention provides a cleaning device (100) for cleaning the inner surface of a steel pipe (10) buried underground by spraying dry ice, comprising: a main body; a main body driving unit (110) installed to drive the main body inside the steel pipe (10); a storage unit (120) installed at the rear of the main body to store dry ice; a supply unit (130) installed in the main body to supply dry ice from the storage unit (120); a spray pipe (140) installed at the front of the main body to receive dry ice from the supply unit (130); a spray pipe driving unit (141) installed in the main body to rotate the spray pipe (140) along the inner circumference of the steel pipe (10); a spray unit (142) installed at the end of the spray pipe (140) to spray dry ice onto the inner surface of the steel pipe (10); and a length adjustment unit (150) for adjusting the length of the spray pipe (140). A cleaning device (100) for a steel pipe is provided, characterized by including a control unit (160) that controls the main body driving unit (110), the spray pipe driving unit (141), and the length adjustment unit (150) so that when the main body drives the inside of the steel pipe (10), the distance between the spray unit (142) and the steel pipe (10) is maintained within a certain range despite changes in the curvature of the steel pipe (10) and the rotation of the spray pipe (140).

[0023] The above injection tube (140) preferably includes a rotating injection tube (143) that rotates by being coupled to the injection tube driving unit (141); and an extension injection tube (144) that is coupled to the end of the rotating injection tube (143) so as to be sliding, and the length adjustment unit (150) preferably includes a cylinder (151) hinged to the rotating injection tube (143); and a piston (152) that is installed in the cylinder (151) and hinged to the extension injection tube (144).

[0024] The supply unit (130) preferably comprises: a dry ice supply pipe (131) for supplying dry ice from the storage unit (120); an air supply pipe (132) for supplying high-pressure air; an orifice (133) for supplying dry ice from the dry ice supply pipe (131) by means of a high-speed flow of air supplied through the air supply pipe (132); and a nozzle (134) for discharging a mixed fluid of high-pressure air and dry ice from the orifice (133) toward the spray pipe (140).

[0025] It is preferable to further include a sensing unit (170) installed in the main body to provide information for control to the above control unit (160).

[0026] The sensing unit (170) preferably includes an IMU sensor that measures the tilt and spatial orientation of the main body.

[0027] The sensing unit (170) includes a front camera (171) installed at the front of the main body; and the control unit (160) preferably controls the speed of the main body driving unit (110) and the spray pipe driving unit (141) based on the amount of foreign matter removed by washing.

[0028] It is preferable that the control unit (160) controls the length of the injection pipe (140) to become shorter as the injection unit (142) moves upward when the main body is driven downward, and controls the length of the injection pipe (140) to become longer as the injection unit (142) moves downward, and controls the length of the injection pipe (140) to become longer as the injection unit (142) moves upward when the main body is driven upward, and controls the length of the injection pipe (140) to become shorter as the injection unit (142) moves downward.

[0029] It is preferable that the control unit (160) controls the length of the injection pipe (140) to become shorter as the injection unit (142) moves toward the right when the main body is driven leftward, and controls the length of the injection pipe (140) to become longer as the injection unit (142) moves toward the left, and controls the length of the injection pipe (140) to become longer as the injection unit (142) moves toward the right when the main body is driven rightward, and controls the length of the injection pipe (140) to become longer as the injection unit (142) moves toward the left.

[0030] The present invention provides a cleaning system for a steel pipe using the cleaning device (100), comprising: the cleaning device (100); and a supply device that repeatedly operates between the inlet of the steel pipe (10) and the cleaning device (100) to supply dry ice to the storage unit (120) inside the steel pipe (10).

[0031] The present invention provides a method for cleaning a steel pipe using the above-described cleaning system, comprising the steps of: introducing a cleaning device (100) to the front of a cleaning area inside the steel pipe (10); and driving the cleaning device (100) backward while simultaneously receiving dry ice from the supply device and cleaning the inner surface of the steel pipe (10) by spraying dry ice. Effects of the invention

[0032] The present invention provides a cleaning device for a steel pipe buried underground and a cleaning method using the same, which can increase cleaning efficiency by maintaining the distance between the end of the spray pipe and the steel pipe within a constant range, regardless of changes in the curvature of the steel pipe and the rotation of the spray pipe. Brief explanation of the drawing

[0033] FIGS. 1 to 7 are process diagrams of a conventional steel pipe rehabilitation method. FIG. 8 and below illustrate embodiments of the present invention, FIG. 8 is a side view of the cleaning device. FIG. 9 is a front view of the cleaning device. FIG. 10 is a cross-sectional view of the supply section. FIG. 11 is a diagram showing the usage state of the cleaning device. Specific details for implementing the invention

[0034] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

[0035] As illustrated in FIG. 8 and below, the present invention relates to a cleaning device (100) for cleaning the inner surface of a steel pipe (10) buried underground by spraying dry ice.

[0036] This comprises a main body, a main body drive unit (110), a storage unit (120), a supply unit (130), a spray pipe (140), a spray pipe drive unit (141), a spray unit (142), a length adjustment unit (150), and a control unit (160).

[0038] The main body drive unit (110) has a structure such as an endless track, and is formed so that the main body drives along the longitudinal direction within a cylindrical steel tube (10) despite changes in its curvature.

[0039] The storage unit (120) has a hopper structure, etc. and is installed at the rear of the main body to store dry ice.

[0040] This receives dry ice by a separate supply device (not shown) and transports the dry ice to the supply unit (130) by a screw conveyor (121).

[0041] The supply device is driven repeatedly between the inlet of the steel pipe (10) and the cleaning device (100) to supply dry ice to the storage unit (120) inside the steel pipe (10).

[0043] The supply unit (130) is installed in the main body to supply dry ice from the storage unit (120).

[0044] Specifically, this is configured to include a dry ice supply pipe (131), an air supply pipe (132), an orifice (133), and a nozzle (134). (Fig. 10)

[0045] The dry ice supply pipe (131) supplies dry ice transported by the screw conveyor (121) of the storage unit (120).

[0046] The air supply pipe (132) supplies high-pressure compressed air.

[0047] The orifice (133) allows dry ice to be supplied from the dry ice supply pipe (131) by the high-speed flow of air supplied (discharged) through the air supply pipe (132).

[0048] The nozzle (134) discharges a mixture of high-pressure air and dry ice from the orifice (133) toward the spray pipe (140).

[0049] The amount of dry ice discharged can be controlled by adjusting the gap between the front end of the orifice (133) and the rear end of the nozzle (134).

[0051] The spray pipe (140) is installed at the front of the main body to receive dry ice from the supply unit (130).

[0052] The injection pipe drive unit (141) is installed in the main body so that the injection pipe (140) rotates along the inner circumference of the steel pipe (10).

[0053] The spraying part (142) is installed at the end of the spray pipe (140) to spray dry ice onto the inner surface of the steel pipe (10).

[0054] The length adjustment part (150) adjusts the length of the spray tube (140).

[0055] Specifically, the injection tube (140) is configured to include a rotating injection tube (143) that rotates by being coupled to an injection tube driving unit (141); and an extension injection tube (144) coupled to the end of the rotating injection tube (143) so as to be capable of sliding (sliding drive).

[0056] The length adjustment unit (150) is configured to include a cylinder (151) hinged to a rotating injection pipe (143); and a piston (152) installed in the cylinder (151) and hinged to an extension injection pipe (144).

[0058] The control unit (160) controls the main body driving unit (110), the injection pipe driving unit (141), and the length adjustment unit (150) so that when the main body drives the inside of the steel pipe (10), the distance between the injection unit (142) and the steel pipe (10) is maintained within a constant range, regardless of the change in curvature of the steel pipe (10) and the rotation of the injection pipe (140). (Fig. 11)

[0059] For example, when the main body is driven downward, as the injection part (142) moves upward, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes shorter, so the control part (160) controls the length of the injection pipe (140) to be shortened.

[0060] When the main body is driven downward, as the injection part (142) moves downward, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes longer, so the control part (160) controls the length of the injection pipe (140) to become longer.

[0061] Conversely, when the main body is driven upward, as the injection part (142) moves upward, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes longer, so the control part (160) controls the length of the injection pipe (140) to increase.

[0062] When the main body is driven upward, as the injection part (142) moves downward, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes shorter, so the control part (160) controls the length of the injection pipe (140) to be shortened.

[0063] For example, when the main body is driven to the left, as the injection part (142) moves toward the right, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes shorter, so the control part (160) controls the length of the injection pipe (140) to be shortened.

[0064] When the main body is driven to the left, as the injection part (142) moves toward the left, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes longer, so the control part (160) controls the length of the injection pipe (140) to become longer.

[0065] Conversely, when the main body is driven to the right, as the injection part (142) moves toward the right, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes longer, so the control part (160) controls the length of the injection pipe (140) to become longer.

[0066] When the main body is driven to the right, as the injection part (142) moves toward the left, the distance between the end of the injection pipe (140) and the inner surface of the steel pipe (10) becomes shorter, so the control part (160) controls the length of the injection pipe (140) to be shortened.

[0068] The sensing unit (170) is installed in the main body to provide information for control to the control unit (160).

[0069] This may be configured to include an IMU sensor for measuring the tilt and spatial orientation of the main body; a front camera (171) installed at the front of the main body; a rear camera (not shown) installed at the rear of the main body, etc.

[0070] The information provided by the IMU sensor senses the upward, downward, leftward, and rightward movement of the main body, thereby allowing the length of the injection tube (140) described above to be controlled.

[0071] The front camera (171) allows the amount of foreign matter removed by washing to be determined, thereby enabling the speed of the main body drive unit (110) and the spray tube drive unit (141) to be controlled.

[0072] For example, if it is determined that there is a large amount of foreign matter, the speed of the main body drive unit (110) can be slowed down and the speed of the injection tube drive unit (141) can be controlled quickly.

[0073] The rear camera can monitor the situation in which the supply device supplies dry ice to the storage unit (120).

[0075] The steel pipe cleaning system according to the present invention comprises: the cleaning device (100); and a supply device that repeatedly drives between the inlet of the steel pipe (10) and the cleaning device (100) to supply dry ice to the storage unit (120) inside the steel pipe (10).

[0076] The supply device can perform the role of supplying dry ice to the cleaning device (100), replacing the battery of the cleaning device (100), etc.

[0077] Since a number of conduits, wires, etc. are connected to the cleaning device (100), when performing cleaning work while advancing the cleaning device (100), interference may occur due to these conduits, wires, etc.

[0078] Therefore, the cleaning device (100) is introduced up to the front of the cleaning area inside the steel pipe (10), and the above pipes, wires, etc. are all spread out.

[0079] Afterwards, the cleaning device (100) is driven backward, and dry ice is supplied by the supply device, and the inner surface of the steel pipe (10) is cleaned by spraying dry ice.

[0080] Therefore, there is an advantage in that interference by the aforementioned pipes, wires, etc., can be avoided during the cleaning process.

[0082] The foregoing merely describes some preferred embodiments that can be implemented by the present invention. As is well known, the scope of the present invention should not be interpreted as being limited to the above embodiments, and all technical concepts that share the fundamental principles with the technical concept of the present invention described above shall be considered to be included within the scope of the present invention. Explanation of the symbols

[0083] 10 : Steel pipe 100 : Washing device 110: Main body drive unit 120: Storage unit 130: Supply unit 131: Dry ice supply pipe 132: Air supply pipe 133: Orifice 134 : Nozzle 140 : Spray pipe 141: Injection pipe drive unit 142: Injection unit 143: Rotary spray nozzle 144: Extended spray nozzle 150 : Length adjustment part 151 : Cylinder 152 : Piston 160 : Control unit 170: Sensing unit 171: Front camera

Claims

Claim 1 A cleaning device (100) for cleaning the inner surface of a steel pipe (10) buried underground by spraying dry ice, comprising: a main body; a main body driving unit (110) installed to drive the main body inside the steel pipe (10); a storage unit (120) installed at the rear of the main body to store dry ice; a supply unit (130) installed in the main body to supply dry ice from the storage unit (120); a spray pipe (140) installed at the front of the main body to receive dry ice from the supply unit (130); a spray pipe driving unit (141) installed in the main body to rotate the spray pipe (140) along the inner circumference of the steel pipe (10); a spray unit (142) installed at the end of the spray pipe (140) to spray dry ice onto the inner surface of the steel pipe (10); a length adjustment unit (150) for adjusting the length of the spray pipe (140); and when the main body drives the inside of the steel pipe (10), A control unit (160) that controls the main body drive unit (110), the injection pipe drive unit (141), and the length adjustment unit (150) so that the distance between the injection part (142) and the steel pipe (10) is maintained within a certain range despite changes in the curvature of the steel pipe (10) and rotation of the injection pipe (140); and a sensing unit (170) installed in the main body to provide information for control to the control unit (160); wherein the injection pipe (140) includes a rotating injection pipe (143) that rotates in conjunction with the injection pipe drive unit (141); and an extension injection pipe (144) that is coupled to the end of the rotating injection pipe (143) so as to be sliding; and the length adjustment unit (150) includes a cylinder (151) hinged to the rotating injection pipe (143); and a piston (152) installed in the cylinder (151) and hinged to the extension injection pipe (144). Including, the sensing unit (170) includes an IMU sensor that measures the tilt and spatial orientation of the main body;The control unit (160) controls the length of the spray pipe (140) to become shorter as the spray unit (142) faces upward when the main body is driven downward, and controls the length of the spray pipe (140) to become longer as the spray unit (142) faces downward; when the main body is driven upward, controls the length of the spray pipe (140) to become longer as the spray unit (142) faces upward, and controls the length of the spray pipe (140) to become shorter as the spray unit (142) faces downward; and when the main body is driven leftward, controls the length of the spray pipe (140) to become shorter as the spray unit (142) faces right, and controls the length of the spray pipe (140) to become longer as the spray unit (142) faces left. When the main body is driven rightward, the A steel pipe cleaning device (100) characterized by controlling the length of the spray pipe (140) to increase as the spray part (142) moves toward the right, and controlling the length of the spray pipe (140) to decrease as the spray part (142) moves toward the left. Claim 2 delete Claim 3 In claim 1, the supply unit (130) comprises: a dry ice supply pipe (131) for supplying dry ice from the storage unit (120); an air supply pipe (132) for supplying high-pressure air; an orifice (133) for supplying dry ice from the dry ice supply pipe (131) by means of a high-speed flow of air supplied through the air supply pipe (132); and a nozzle (134) for discharging a mixed fluid of high-pressure air and dry ice from the orifice (133) toward the spray pipe (140). The cleaning device (100) for a steel pipe is characterized by including Claim 4 delete Claim 5 delete Claim 6 A steel pipe cleaning device (100) according to claim 1, wherein the sensing unit (170) includes a front camera (171) installed in front of the main body, and the control unit (160) controls the speed of the main body driving unit (110) and the spray pipe driving unit (141) according to the amount of foreign matter removed by cleaning. Claim 7 delete Claim 8 delete Claim 9 A cleaning system for a steel pipe using a cleaning device (100) according to any one of claims 1, 3, and 6, wherein the cleaning device (100); and a supply device that repeatedly drives between the inlet of the steel pipe (10) and the cleaning device (100) to supply dry ice to the storage unit (120) inside the steel pipe (10). Claim 10 A method for cleaning a steel pipe using a cleaning system according to claim 9, comprising: a step of moving a cleaning device (100) up to the front of a cleaning area inside the steel pipe (10); and a step of driving the cleaning device (100) backward while simultaneously cleaning the inner surface of the steel pipe (10) by spraying dry ice while receiving dry ice from the supply device.

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