KR-102962468-B1 - A straight line, curved pipe partial repair and branch repair method using a non-excavated partial repair packer and branch pipe repair device

KR102962468B1KR 102962468 B1KR102962468 B1KR 102962468B1KR-102962468-B1

Abstract

The present invention relates to a method for partial repair of straight and curved pipelines and branch pipes using a non-excavation partial repair packer and a branch pipe repair device, wherein the method comprises a pipeline internal identification step, a pipeline internal cleanup step, a non-excavation partial repair packer placement step, and a partial repair material construction completion step; wherein, if the damaged portion in the pipeline internal identification step is a location where a branch pipe is formed, the method comprises a partial repair material cutting step, a branch pipe repair device movement step, a repair step, and a joint repair construction completion step after the partial repair material construction completion step. In the event that the damaged portion of the pipeline is a location where a branch pipe is formed during partial repair of the pipeline, the method maintains a self-supporting fixed state before the expansion of the expansion part by means of an expansion part made of an elastic material and a support bar that operates automatically by means of an operating cylinder, thereby enhancing the convenience of the worker.

Inventors

고원준
고상호

Assignees

(주)우암이노텍
(주)우암시스템

Dates

Publication Date: 20260511
Application Date: 20241216

Claims (5)

In a partial pipe repair and reinforcement method for repairing pipes ranging from small to large diameters with a diameter of 150 to 1,500 mm, Pipeline internal assessment step for identifying the condition and location of damaged parts and obstacles inside the pipeline; A pipe internal cleaning step for removing sludge and foreign substances from inside the pipe; A non-excavation partial repair packer placement step comprising, after the above-mentioned internal pipe cleaning step, a housing including flanges having perforated holes formed at both ends, an elastic packing part that expands and contracts by the inflow of compressed air and can be bent, and a wheel part that is coupled to the flanges constituting the housing, wherein a partial repair material impregnated with a hardening agent is attached to the outer surface of the packing part of the non-excavation partial repair packer and then moved to the location of the damaged part of the pipe; The method comprises a partial repair material construction completion step in which compressed air is injected into the packing portion of the non-excavation partial repair packer in the above-mentioned non-excavation partial repair packer placement step to adhere and harden the partial repair material to the damaged portion, then the compressed air is removed from the packing portion, and the non-excavation partial repair packer is moved. If, during the above pipeline internal identification step, the damaged part is located at a position where a branch pipe is formed, after the above partial repair material construction completion step, A partial repair material cutting system for cutting partial repair material at the location of a branch pipe branching off from the pipeline, and A body part including an air supply section on the inside; An expansion part made of an elastic material that expands by compressed air supplied through the air supply part of the body part, wherein the expansion part is coupled to the upper end of the body part and is composed of a pipe contact packer formed in a horizontal direction and a branch pipe contact packer extending upward from the inner center of the pipe contact packer; A branch pipe repair device moving step comprising: an operating cylinder coupled to the lower side of the body part; a support bar having one side coupled to the operating cylinder and rotatably connected by a hinge at a position spaced apart from the position coupled to the operating cylinder, wherein when the operating cylinder is operated, the one side coupled to the operating cylinder moves horizontally and rotates vertically around the hinge to contact the pipe and support the body part; and a spring having one side connected to the body part and the other side connected to the support bar to apply elastic force so that the support bar is positioned horizontally when the operating cylinder is not operated; wherein the expansion part of the branch pipe repair device is impregnated with an impregnating material and a joint repair material consisting of a vertically extended branch pipe repair material inserted into the branch pipe and a pipe repair material extending horizontally below the branch pipe repair material is combined and moved to the position of the branch pipe branching from the pipe. A repair step in which, after the moving step of the branch pipe repair device, a branch pipe contact packer to which a branch pipe repair material is attached among the joint repair materials attached to the expansion part constituting the branch pipe repair device is inserted into the branch pipe, and inserted to a position where the pipe repair material can be in close contact with the pipe, and then, in order to prevent the branch pipe repair device from being pushed in the opposite direction from being inserted into the branch pipe when the expansion part is operated and to ensure it stands upright and is fixed, the support bar is rotated vertically through the operating cylinder of the support part constituting the branch pipe repair device so that the end of the support bar contacts the bottom surface of the pipe and supports the body part, and then compressed air is injected into the expansion part through an external air supply device to expand it and repair the joint between the pipe and the branch pipe; The joint repair construction completion stage comprises: when the repair of the joint between the conduit and the branch pipe is completed through the above repair stage, stopping the air supply of the air supply device to return the expanded expansion part constituting the branch pipe repair device to its initial state and simultaneously stopping the operation of the operating cylinder of the support part so that the support bar returns to its initial position by means of a spring, and then detaching and moving the branch pipe repair device inserted into the branch pipe to its initial position to complete the construction; A method for partial repair of straight and curved pipelines and branch pipes using a non-excavation partial repair packer and a branch pipe repair device, characterized in that, when the above pipeline is a small pipe, the support bar of the support part constituting the branch pipe repair device during the movement stage of the branch pipe repair device further includes a length adjustment means for length adjustment.
A method for partial repair of straight and curved pipelines and branch pipes using a non-excavation partial repair packer and a branch pipe repair device, wherein, in the case of claim 1, when the pipeline is a small pipe, the lower side of the body part constituting the branch pipe repair device during the movement stage of the branch pipe repair device further includes a wheel.
In paragraph 1, if the above-mentioned pipe is a small pipe, The body part constituting the branch pipe repair device during the moving stage of the branch pipe repair device is configured to further include a coupling hole, and A method for partial repair of straight and curved pipelines and repair of branch pipes using a non-excavation partial repair packer and a branch pipe repair device, characterized by moving the branch pipe repair device to the location of the branch pipe branching from the pipeline using a mobile robot that includes a coupling bar with upper and lower height adjustment capabilities that can be coupled to a coupling hole formed in the branch pipe repair device in front, in order to move the branch pipe repair device in the moving step of the branch pipe repair device.
A method for partial repair of straight and curved pipelines and branch pipes using a non-excavation partial repair packer and a branch pipe repair device, characterized in that, in the moving step of the branch pipe repair device, the coupling hole formed in the branch pipe repair device is formed larger than the size of the coupling bar formed in the moving robot, and the coupling bar further includes a magnetic material.
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Description

A method for partial repair of straight and curved pipelines and branch pipes using a non-excavated partial repair packer and branch pipe repair device The present invention relates to a method for partial repair of straight and curved pipelines and branch pipes using a non-excavation partial repair packer and a branch pipe repair device, which can improve workability during partial repair of main straight and curved pipelines as well as partial repair of locations where branch pipes are present in the pipeline through a flexible non-excavation partial repair packer. Generally, the method of excavating the ground or road and replacing the pipe itself has been widely used to repair sewer pipes buried underground. However, this sewer pipe repair method has several problems, as follows. Since traffic must be blocked throughout the entire construction section, road closures cause traffic congestion. In cases where long-term road closures of approximately 15 to 30 days are required, construction itself may become impossible. Replacing the pipes themselves can also cause environmental problems, such as contaminating soil and groundwater through sewage leakage caused by pipe breakage and faulty joints, reducing the efficiency of sewage treatment plants due to groundwater inflow, and generating large amounts of construction waste. Repair work involving the replacement of pipes themselves not only generates numerous complaints, but intermittent maintenance also leads to distrust in the administration and makes it impossible to adequately respond to the need for unpredictable emergency repairs. Furthermore, it is currently difficult to establish long-term plans to address these complaints. In some cases, indirect work such as temporary structures is required in addition to direct construction like sewer pipe repairs, making it uneconomical when considering the cost of such temporary structures. Since concrete sewer pipes are simply replaced, they remain susceptible to chemical resistance and corrosion, and there is a problem that repair work must be performed again if deterioration progresses rapidly. Excavation of the ground or road causes subsidence in the surrounding area, and there is a constant risk of damage to other buried pipes, such as gas lines, during excavation. There is a concern regarding safety accidents involving workers and residents due to the excavation work. After construction, ground re-establishment and road repaving are required, which leads to a shortened road lifespan. Additionally, since separate work is necessary to ensure precise construction of the joints and watertightness of the replaced sewer pipes, the construction period is further extended. Therefore, in recent years, technology for repairing sewer pipes without excavating the ground or roads has been developed and is widely used. In particular, for sewer pipes with a small diameter (for example, a diameter of less than 800 mm, which makes it difficult for a person to walk), workers are restricted from entering the sewer pipe to work, so a remote-controlled trenchless repair device for sewer pipes is used. Prior art using trenchless repair devices includes the following: For example, Korean Registered Patent No. 10-1188717 comprises: a remotely controlled vehicle that is remotely controlled from outside the sewer pipe and travels inside the sewer pipe in the direction of the sewer pipe axis; a packer positioned in front of the remotely controlled vehicle, having a branch pipe lining sheet wound around its outer surface and connected to an air injection pipe so as to be inflatable by air injection; a rotation means positioned in front of the remotely controlled vehicle and remotely controlled from outside the sewer pipe to rotate the packer around the sewer pipe axis; a parallelogram link mechanism having a first link mounted on the rotation means, a second link spaced forward from the first link and parallel to the first link, and a pair of third and fourth links connected to the first and second links so as to be relatively rotatable and parallel to each other, and a packer insertion means having a link driving mechanism to rotate the third link to insert the packer into the branch pipe; It comprises a packer stepless tilting means mounted on a second link of the packer insertion means to tilt the packer in all directions (360 degrees); and further comprises a packer detachable means configured to install the packer on a spherical body coupled to a support member constituting the packer stepless tilting means, and to enable the packer stepless tilting means to be mounted or detached from the second link of the packer insertion means by remote control from outside the sewer pipe; and is configured so that after the packer is detached from the branch pipe by the packer detachable means, a remote vehicle can be transported to another branch pipe to continuously insert and mount another packer. (Patent Document 1) KR 10-1188717 B1 Non-