Extended towing device without cross-sectional loss and construction method using it

Abstract

The present invention relates to an expansion traction device without cross-sectional loss and a construction method using the same, which allows for easier replacement of an aging pipe buried underground without excavating the surface and without cross-sectional loss and cavitation caused by ground subsidence. The device comprises: a conveying body that is conveyed into the interior of the aging pipe; a conveying pipe body provided on the inner side of the conveying body and conveyed into the interior of the aging pipe together with the conveying body; a plurality of crushing plates formed radially on the outer side of the conveying body and crushing the aging pipe by applying pressure in the direction of the inner surface of the aging pipe while being conveyed into the interior of the aging pipe along the conveying body; and a propulsion pipe comprising a plurality of cylinders provided radially between the plurality of crushing plates and the conveying pipe body while penetrating the conveying body, which move the plurality of crushing plates from the outer side of the conveying body toward the inner surface of the aging pipe and return them to their original position from the inner surface of the aging pipe toward the outer side of the conveying body. It is characterized by comprising a towing unit that tows the above-mentioned propulsion pipe into the interior of the above-mentioned aging pipe.

Description

Technology Field

[0001] The present invention relates to an expansion traction device without cross-sectional loss and a construction method using the same, which allows for easier replacement of aging pipes buried underground without excavating the surface and without cross-sectional loss and cavitation caused by ground subsidence. Background Technology

[0003] Generally, piping work is carried out in living infrastructure such as houses and roads to bury pipes underground for water supply and sewage treatment, or to serve as underground lines for power and communication cables. In this regard, an underground buried pipe and a method of burying the same, which involves burying multiple pipe bodies in parallel underground to construct a common groove for power lines, have been proposed in Japanese Patent No. 4224758.

[0004] As such, pipes installed in accordance with Japanese Patent No. 4224758, etc., will experience corrosion or damage on the inside and outside of the pipe depending on the environment of the fluid flowing along the pipe or the soil after a certain period of time.

[0005] In particular, in the case of water pipes, if the pipes corrode or break, it causes a very serious problem of immediately contaminating drinking water, and in the case of sewer pipes, if the pipes corrode or break, it causes a problem of contaminating the surrounding soil with wastewater.

[0006] In addition, the occurrence of rusty water due to corroded water pipes has an adverse effect on water quality and causes distrust among consumers, and in the case of sewer pipes, leaked sewage results in the contamination of soil and groundwater.

[0007] Furthermore, in the case of gas pipes, if the pipe corrodes or is damaged, it causes gas leakage, leading to problems such as explosion accidents.

[0008] Therefore, pipes buried underground must be replaced with new pipes after a certain period of time.

[0009] However, in order to replace old pipes buried underground, the surface must be excavated to a certain depth to remove the old pipes and then bury new pipes. This excavation of the surface obstructs the flow of vehicles and people on the ground, causing inconvenience to traffic. Prior art literature

[0011] Japanese Patent No. 4224758 The problem to be solved

[0012] The present invention was created to solve the aforementioned problems, and aims to provide an expansion traction device without cross-sectional loss and a construction method using the same, which allows for easier replacement of aging pipes buried underground without excavating the surface and without cross-sectional loss and cavitation caused by ground subsidence. means of solving the problem

[0014] The present invention, for achieving the above-mentioned purpose, provides an expansion traction device without cross-sectional loss, comprising: a conveying body that is conveyed into the interior of an aging pipe; a conveying pipe body provided on the inner side of the conveying body and conveyed into the interior of the aging pipe together with the conveying body; a plurality of crushing plate sections formed radially on the outer side of the conveying body and crushing the aging pipe by pressurizing it in the direction of the inner surface of the aging pipe while being conveyed into the interior of the aging pipe along the conveying body; a plurality of cylinders provided radially between the plurality of crushing plate sections and the conveying pipe body while penetrating the conveying body and moving the plurality of crushing plate sections from the outer side of the conveying body toward the direction of the inner surface of the aging pipe and returning them to their original position from the inner surface of the aging pipe toward the outer side of the conveying body; and a traction section that pulls the propulsion pipe into the interior of the aging pipe.

[0016] Here, it is preferable that an inclined surface be formed on the front outer surface of the conveying body of the propulsion tube, which gradually slopes inward toward the conveying body as it moves from the rear to the front of the conveying body.

[0018] And, the above-mentioned propulsion tube is characterized by comprising: a transport frame formed to protrude outward from the rear side of the transport body and transported into the interior of the aging pipe together with the transport body; and a soil inflow prevention plate formed to extend a certain length outward from the rear side of the transport body while wrapping the transport frame.

[0020] In addition, it is preferable that an inclined surface be formed on the front outer surface of the transfer frame, which gradually slopes inward toward the transfer frame as it moves from the rear to the front side of the transfer frame.

[0022] Furthermore, it is preferable that the propulsion tube comprises a plurality of reinforcing frames radially provided on the inner front side of the transfer body; and a cover frame provided between the inner surface of the transfer body and the outer surface of the transfer tube body while enclosing the plurality of cylinders.

[0024] In addition, it is preferable that a crushing blade is formed on the outer surface of each of the plurality of crushing plates, protruding to a certain height in the outward direction of the plurality of crushing plates.

[0026] In addition, it is preferable that a lead pipe, which is towed into the interior of the aging pipe along the lead pipe, is connected to the rear side of the conveying body of the propulsion pipe, and that a plurality of main pipes, which are towed into the interior of the aging pipe along the lead pipe, are sequentially connected to the rear side of the lead pipe.

[0028] In addition, the above-mentioned towing unit is preferably configured to include a towing line winch; and a towing line provided between the towing line winch and the transfer body of the propulsion pipe, connecting the towing line winch and the transfer body, and unwinding from the towing line winch and winding onto the towing line winch.

[0030] In addition, it is preferable that the plurality of cylinders of the propulsion pipe are hydraulic cylinders, and that the propulsion pipe is configured to include a hydraulic line that supplies hydraulic pressure to be supplied to the hydraulic cylinders forming the plurality of cylinders into the interior of the transfer pipe while connected to the transfer pipe.

[0032] In addition, it is preferable that the above propulsion tube be configured to include a flow detection member that detects the flow rate of the fluid passing through the hydraulic line.

[0034] In addition, it is preferable that the above propulsion tube be configured to include a camera member provided on the front side of the transfer tube body of the above propulsion tube.

[0036] Furthermore, the present invention comprises: a) a step of preparing a propulsion pipe and a traction part of an expansion traction device without cross-sectional loss, wherein the propulsion pipe and traction part are prepared; b) a step of installing a propulsion pipe and a traction part of the expansion traction device without cross-sectional loss at the starting point of replacement of the aging pipe and installing a traction part of the expansion traction device without cross-sectional loss at the ending point of replacement of the aging pipe; c) a step of connecting a propulsion pipe and a traction part of the propulsion pipe and a traction part of the propulsion pipe; d) a step of connecting a lead pipe to the propulsion pipe; e) a step of crushing and replacing an aging pipe by transporting the propulsion pipe connected to the lead pipe into the interior of the aging pipe and crushing a portion of the aging pipe located at the starting point of replacement of the aging pipe with the propulsion pipe; f) a step of connecting a main pipe to the rear side of the lead pipe; and g) a step of subsequently crushing and replacing an aging pipe by transporting the propulsion pipe again through the traction part to crush a portion of the aging pipe again by the transport distance, and positioning the lead pipe and the main pipe in the area of ​​the crushed aging pipe. h) a main pipe subsequent connection step in which another main pipe is connected to the rear side of the main pipe; and i) an aging pipe replacement completion step in which the g) aging pipe subsequent crushing and replacement step and the h) main pipe subsequent connection step are alternately and repeatedly performed, such that when the crushing of the aging pipe is completed, the propulsion pipe located at the point of completion of the replacement of the aging pipe is separated from the lead pipe, thereby completing the replacement of the aging pipe; the present invention provides a construction method using an expansion traction device without cross-sectional loss, characterized by comprising: a propulsion pipe subsequent connection step in which the aging pipe subsequent crushing and replacement step and the h) main pipe subsequent connection step are alternately and repeatedly performed, such that the propulsion pipe located at the point of completion of the replacement of the aging pipe is separated from the lead pipe. Effects of the invention

[0038] The present invention has the effect of enabling easier replacement of an aging pipe buried underground without excavating the surface and without cross-sectional loss or cavitation caused by ground subsidence, by using a propulsion pipe that positions a lead pipe and a plurality of main pipes inside the aging pipe, in addition to crushing the aging pipe by expanding a plurality of crushing plates into the interior of the aging pipe through a plurality of cylinders while the aging pipe is being crushed. Brief explanation of the drawing

[0040] FIG. 1 is a schematic side view showing an extended traction device without cross-sectional loss, which is an embodiment of the present invention. Figure 2 is an enlarged cross-sectional view schematically showing the thrust pipe. Figures 3 and 4 are cross-sectional views along line A-A of Figure 2 schematically illustrating the process of expanding a plurality of crushing plates of the propulsion pipe. FIGS. 5 and FIGS. 6 are cross-sectional views schematically showing the state in which crushing blades are formed on the outer surface of a plurality of crushing plates. Figure 7 is an enlarged cross-sectional view schematically showing the state in which the lead pipe and the main pipe are separated from the propulsion pipe. Fig. 8 is an enlarged cross-sectional view of the connection of Fig. 7. FIG. 9 is an enlarged combined cross-sectional view schematically showing a cover frame that encloses a plurality of cylinders and has an inclined surface formed on the front outer circumference of the transfer frame of the propulsion pipe. FIG. 10 is a block diagram schematically illustrating a construction method using an expansion traction device without cross-sectional loss, which is an embodiment of the present invention. Figure 11 is a cross-sectional view schematically showing an aging pipe buried underground. Figure 12 is a cross-sectional view schematically showing the preparation process of the traction part. Figure 13 is a cross-sectional view schematically showing the preparation process of the thrust pipe and the state in which the thrust pipe and the traction part are connected. Figure 14 is a cross-sectional view schematically showing the state in which the propulsion pipe is transferred into the interior of the aging pipe. Figure 15 is a cross-sectional view schematically showing the state in which the propulsion pipe and the lead pipe are connected. Figure 16 is a cross-sectional view schematically showing the state in which a portion of the old pipe is crushed by the propulsion pipe. FIG. 17 is a cross-sectional view schematically showing the state in which a lead pipe and a main pipe connected to the lead pipe are transferred into the interior of an aging pipe together with a propulsion pipe. FIG. 18 is a cross-sectional view schematically showing the state in which a portion of the old pipe is crushed again by the propulsion pipe. FIG. 19 is a cross-sectional view schematically showing the state in which the lead pipe and the main pipe are transferred again into the interior of the aging pipe along with the propulsion pipe. FIG. 20 is a cross-sectional view schematically showing the state in which the propulsion pipe has been transferred to the point where the replacement of the old pipe has been completed. FIG. 21 is a cross-sectional view schematically showing the state in which the propulsion tube is separated from the lead tube. Specific details for implementing the invention

[0041] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. Of course, the scope of the present invention is not limited to the following embodiments, and various modifications can be made by those skilled in the art within the scope of the technical essence of the present invention.

[0043] FIG. 1 is a schematic side view showing an extended traction device without cross-sectional loss, which is an embodiment of the present invention.

[0045] An extension traction device without cross-sectional loss, which is an embodiment of the present invention, is largely composed of a propulsion pipe (10) and a traction part (20) as shown in FIG. 1.

[0047] Figure 2 is an enlarged cross-sectional view schematically showing the thrust pipe.

[0049] First, the above-mentioned propulsion pipe (10) is intended to be intermittently transported into the interior of an old pipe buried underground to crush the old pipe.

[0050] The above propulsion tube (10) is configured, for example, as shown in FIG. 2, to include a conveying body (110), a conveying tube body (111), a plurality of crushing plate parts (120), and a plurality of cylinders (130).

[0051] The above-mentioned transfer body (110) can be formed in various shapes, such as a tubular shape that extends a certain length in the front-rear direction of the aging pipe, and the front and rear sides of the above-mentioned transfer body (110) can each be open.

[0052] The above transfer body (110) can be intermittently transferred from the inner rear side of the aging pipe to the inner front side.

[0054] Figures 3 and 4 are cross-sectional views along line A-A of Figure 2 schematically illustrating the process of expanding a plurality of crushing plates of the propulsion pipe.

[0056] The above transfer pipe (111) is provided at a certain height in the inner middle part of the transfer body (110) and is intermittently transferred into the interior of the aging pipe together with the transfer body (110).

[0057] The above transfer pipe (111) may be formed to extend forward and backward for a certain length along the transfer body (110), and the front and rear sides of the transfer pipe (111) may be closed, respectively.

[0058] As shown in FIGS. 3 and 4, the plurality of crushing plates (120) are formed in a convex arc shape toward the outer direction of the conveying body (110) and can be formed in a radial manner along the outer surface of the conveying body (110) while maintaining a certain distance from the conveying body (110).

[0059] The above plurality of crushing plates (120) can crush the aging pipe by applying pressure while in an expanded state toward the inner surface of the aging pipe during the process of intermittently being transported along the conveying body (110) from the inner rear side to the inner front side of the aging pipe.

[0060] The plurality of cylinders (130) may be provided in a radial arrangement between the plurality of crushing plates (120) and the transfer pipe (111) while penetrating the transfer body (110).

[0061] The cylinder bodies of the plurality of cylinders (130) may be provided on the outer surface of the transfer pipe (111) in various ways, such as by bolt fixing or welding, while communicating with the transfer pipe (111), or may be connected to the transfer pipe (111) through a separate connection line such as a hose.

[0062] The upper portions of the pistons of the plurality of cylinders (130) can be connected to the middle portion of the inner surface of each of the plurality of crushing plates (120) in various ways, such as by bolt fixing, welding fixing, or shaft coupling.

[0063] The plurality of cylinders (130) can move the plurality of crushing plates (120) from the outside of the transport body (110) toward the inner surface of the aging pipe as their length increases so that the plurality of crushing plates (120) can expand toward the inner surface of the aging pipe and crush the aging pipe by applying pressure.

[0064] Additionally, the plurality of cylinders (130) can reduce in length so that the pressure state of the plurality of crushing plates (120) pressurizing the aging pipe can be released, thereby repositioning the plurality of crushing plates (120) from the inner surface of the aging pipe to the outer direction of the transfer body.

[0065] The plurality of cylinders (130) may be of various types, such as electric cylinders, air cylinders, and hydraulic cylinders, but preferably, they are made of hydraulic cylinders that reciprocate linearly with high hydraulic pressure to more precisely pressurize and crush the aging pipe.

[0066] In this way, when the plurality of cylinders (130) are made of hydraulic cylinders, the propulsion pipe (10) may be configured to further include a hydraulic line (115) as shown in FIGS. 1 and 2.

[0067] The above hydraulic line (115) can be made of various types such as a hydraulic hose, and the rear end of the hydraulic line (115) can be watertightly connected to the front lower part of the transfer pipe (111) so as to be in communication with the above hydraulic line (115) and the transfer pipe (111).

[0068] The above hydraulic line (115) can supply hydraulic pressure to be supplied to the hydraulic cylinders forming the plurality of cylinders (130) into the interior of the transfer pipe (111), and although not shown in the drawing, a directional control valve that can be used to raise and lower the pistons of the hydraulic cylinders forming the plurality of cylinders may be further provided.

[0069] Additionally, a hydraulic tank (100) in which a fluid such as oil is stored at a certain height inside; a hydraulic pump (103) for pumping the fluid stored inside the hydraulic tank (110) into the hydraulic line (115); and a hydraulic line winch (104) for winding and unwinding the hydraulic line (115) may be further provided.

[0070] A discharge port (101) may be formed on the lower side of the hydraulic tank (100) so as to be watertightly connected to the front end of the hydraulic line (115).

[0071] The hydraulic pump (103) may be positioned in the hydraulic line (115) portion between the hydraulic line winch (104) and the hydraulic tank (100), and the hydraulic line (115) portion between the hydraulic pump (103) and the propulsion pipe (10) may be wound and unwound by the hydraulic line winch (104).

[0072] Here, in order to allow a worker to confirm that the aging pipe is being easily crushed by the plurality of crushing plates (120), the propulsion pipe (10) may further include a flow detection member (102) that detects the flow rate of the fluid passing through the hydraulic line (115).

[0073] For example, the above flow detection member (102) may be of various types, such as a flow meter that detects the flow rate of fluid discharged into the hydraulic line (115) through the discharge port (101) of the hydraulic tank (100).

[0074] For example, if the fluid flow rate value detected by the flow rate detection member (102) is greater than or equal to the reference flow rate value transmitted to the worker, the worker can confirm that the aging pipe is easily crushed by the plurality of crushing plates (120).

[0075] If the fluid flow rate value detected by the above flow rate detection member (102) is less than the reference flow rate value transmitted to the worker, the worker can confirm that a safety accident has occurred, such as the plurality of crushing plates (120) failing to crush the old pipe.

[0076] Furthermore, although not shown in the drawing, an alert unit for easily notifying a worker that the old pipe is being crushed by the plurality of crushing plates (120) and a control unit for controlling the alert unit may be further provided.

[0077] For example, if the fluid flow rate value detected by the flow rate detection member (102) is greater than or equal to the reference flow rate value set in the control unit, the control unit may determine that the aging pipe is being easily crushed by the plurality of crushing plates (120) and stop the operation of the notification unit.

[0078] When the fluid flow rate value detected by the above flow rate detection member (102) is less than the reference flow rate value set in the control unit, the control unit determines that a safety accident has occurred, such as the plurality of crushing plates (120) failing to crush the old pipe, and can operate the notification unit so that the notification unit can output a notification sound such as a 'siren sound'.

[0079] Next, in order to allow the propulsion pipe (10) to be more easily pulled into the interior of the aging pipe by the traction part (20), an annular inclined surface (100) may be formed on the front outer surface of the transport body (110) of the propulsion pipe (10) as shown in FIG. 2.

[0080] The above-mentioned annular inclined surface (100) can gradually slope inward toward the inside of the transfer body (110) as it moves from the rear side of the transfer body (110) toward the front side.

[0082] FIGS. 5 and FIGS. 6 are cross-sectional views schematically showing the state in which crushing blades are formed on the outer surface of a plurality of crushing plates.

[0084] Next, in order to form a crushing efficiency of the plurality of crushing plates (120) that crush the old pipe by applying pressure, as shown in FIGS. 5 and 6, a crushing blade (121) may be formed in the middle of the outer surface of the plurality of crushing plates (120) to protrude at a certain height in the outer direction of the plurality of crushing plates (120) and cause a crack in the old pipe.

[0085] For example, the crushing blade (121) may be formed in a triangular shape that becomes progressively sharper as it extends from the middle of the outer surface of the plurality of crushing plates (120) toward the outer direction of the plurality of crushing plates (120).

[0087] FIG. 7 is an enlarged separation cross-sectional view schematically showing the state in which the lead pipe and the main pipe are separated from the propulsion pipe, and FIG. 8 is an enlarged connection cross-sectional view of FIG. 7.

[0089] Next, a lead tube (11) can be connected to the rear side of the propulsion tube (10) as shown in FIGS. 7 and FIGS. 8.

[0090] And, a plurality of main tubes (12) can be sequentially connected to the rear side of the above-mentioned lead tube (11).

[0091] The above lead pipe (11) and the above plurality of main pipes (12) are placed inside the old pipe that has been crushed by the above propulsion pipe (10) for the replacement of the old pipe.

[0092] The above-mentioned lead pipe (11) and the above-mentioned multiple main pipes (12) can be made of various types, such as synthetic resin pipes like Hume pipes or PE (polyethylene) pipes.

[0093] The above lead pipe (11) can be towed into the interior of the aging pipe along the above propulsion pipe (10), and the plurality of main pipes (12) can be towed into the interior of the aging pipe along the above lead pipe (11).

[0094] Next, for easy connection between the propulsion tube (10) and the lead tube (11), the propulsion tube (10) may be configured to include a transfer frame (112) as shown in FIGS. 7 and 8.

[0095] The above transfer frame (112) can be formed in various shapes, such as an annular ring shape that protrudes to a certain height in the outer direction of the transfer body (110).

[0096] The front side of the above transfer frame (112) is vertically bent to a certain length inwardly into the transfer frame (112) and can be connected to the rear end, which is the opposite side of the front end of the transfer body (110), in various ways such as welding or bolting.

[0097] The above transfer frame (112) can be transferred into the interior of the aging pipe together with the above transfer body (110).

[0098] The front side of the lead tube (11) can be connected to the transfer frame (112) in various ways, for example, the front side of the lead tube (11) can be screw-coupled to the inside of the transfer frame (112), or the front side of the lead tube (11) can be connected to the transfer frame (112) in various ways such as fusion bonding or band fixing.

[0099] Also, the front side of any one of the multiple main tubes (12) can be connected to the rear side of the lead tube (11) in various ways, such as by screw connection, fusion bonding, or band fixing.

[0100] And, the multiple main pipes (12) can be sequentially connected in such a manner that the front side of another main pipe (12) is connected to the rear side of one main pipe (12) in various ways, such as screw connection, fusion connection, or welding connection.

[0101] Next, the above propulsion pipe (10) may be configured to further include a soil inflow prevention plate (140).

[0102] The above soil inflow prevention plate (140) is intended to prevent some soil from flowing into the inside of the propulsion pipe (10), the inside of the lead pipe (11), and the inside of the main pipe (12) through the gap between the propulsion pipe (10) and the lead pipe (11) and the gap between the lead pipe (11) and one of the main pipes (12).

[0103] The above soil inflow prevention plate (140) can be made of various types, for example, a ring-shaped steel plate with various types of elasticity, such as a galvanized steel plate with a thickness of about 1 mm.

[0104] The front side of the annular soil inflow prevention plate (140) can be connected to the transfer frame (112) of the propulsion pipe (10) in various ways, such as by bolt fixing, welding fixing, fusion bonding, or band fixing, while wrapping around the rear outer surface of the transfer frame (112) of the propulsion pipe (10).

[0105] The rear side of the annular soil inflow prevention plate (140) can be formed to extend horizontally for a certain length in the rear outward direction of the conveying body (110).

[0106] The front side of the lead pipe (11) and one of the main pipes (12) connected to the lead pipe (11) can be accommodated inside the annularly shaped soil inflow prevention plate (140).

[0107] Next, the towing unit (20) is for towing the propulsion pipe (10) into the interior of the aging pipe so that the propulsion pipe (10), which is to crush the aging pipe buried underground, can be intermittently transported from the interior rear side to the interior front side direction of the aging pipe together with the lead pipe (11) and the plurality of main pipes (12).

[0108] The above towing unit (20) can be made of various types, and for example, as shown in FIG. 1, it can be largely configured to include a towing line winch (210) and a towing line (220).

[0109] The above towing line winch (210) can be fixed in various ways, such as by bolting, together with the hydraulic tank (100), the hydraulic pump (103), and the hydraulic line winch (104), for example, on the upper part of a loading frame (31) of a vehicle (3) of various types, such as a truck, while maintaining a certain distance from the hydraulic tank (100), the hydraulic pump (103), and the hydraulic line winch (104).

[0110] The above traction line (220) can be made of various types, such as wire and chain.

[0111] The above towing line (220) is provided between the towing line winch (210) and the propulsion pipe (10) to connect the towing line winch (210) and the propulsion pipe (10).

[0112] The above towing line (220) may, for example, be composed of a first towing line (221) and a plurality of second towing lines (222).

[0113] The first towing line (221) can be unwound from the winch (210) and wound onto the winch (210) on the front side.

[0114] The plurality of second towing lines (222) may be provided at the rear of the first towing line (221).

[0115] For example, as shown in FIG. 8, various types of hook members (7), such as shackles, may be provided between the rear side of the first towing line (221) and the front side of the plurality of second towing lines (222).

[0116] Although not shown in the drawing, a hook member of various types, such as a snap hook that is detachably fixed to the inside of the ring member (7), may be provided on the rear side of the first traction line (221).

[0117] In addition, a hook member of various types, such as a snap hook that is detachably fixed to the inside of the ring member (7), may also be provided on the front side of the plurality of second towing lines (222).

[0118] In addition, although not shown in the drawing, for example, a semi-circular or circular connecting ring member may be provided radially at regular intervals on the front inner surface of the conveying body (110) of the propulsion pipe (10) in various ways, such as by welding or bolting.

[0119] A hook member of various types, such as a snap hook that is detachably fixed to the connecting ring member, may also be provided on the rear side of the plurality of second towing lines (222).

[0120] Next, the above propulsion tube (10) may be configured to further include a camera member (150).

[0121] The camera unit (150) is intended to photograph the internal condition of the aging pipe during the process in which the propulsion pipe (10) intermittently transports from the internal rear side to the internal front side of the aging pipe.

[0122] As shown in FIG. 8, the camera member (150) can be mounted in various ways, such as by bolt fixing, on the upper front side of the transfer body (111) of the propulsion tube (10).

[0123] The captured image of the above camera member (150) can be displayed on a screen through various types of displays, such as smartphones and tablets, that can be carried by the worker.

[0125] FIG. 9 is an enlarged combined cross-sectional view schematically showing a cover frame that encloses a plurality of cylinders and has an inclined surface formed on the front outer circumference of the transfer frame of the propulsion pipe.

[0127] Next, in order to allow the transfer frame (112) to be more easily transferred into the interior of the aging pipe together with the transfer body (110) of the propulsion pipe (10), an annular inclined surface (113) may be formed on the front outer surface of the transfer frame (112) as shown in FIG. 9.

[0128] The above-mentioned annular inclined surface (113) can gradually slope inward toward the inside of the transfer frame (112) as it moves from the rear side of the transfer frame (112) toward the front side.

[0129] Next, the above propulsion tube (10) may be configured to include a reinforcing frame (114).

[0130] The reinforcing frame (114) is intended to reinforce the transfer body (110) so as to improve the durability of the transfer body (110).

[0131] As shown in FIG. 8, the reinforcing frame (114) can be provided in various ways, such as by welding or bolting, in a radial manner on the inner front side of the transport body (110) while maintaining a certain distance from the multiple second towing lines (222) of the towing line (220).

[0132] Next, the propulsion tube (10) may be configured to further include a cover frame (160).

[0133] The above cover frame (160) is intended to safely protect the plurality of cylinders (130) from external forces and to guide the reciprocating linear motion of the plurality of cylinders (130) so that it can be performed stably in a straight line without wobbling.

[0134] The above cover frame (160) can be provided in various ways, such as by bolt fixing or welding, between the inner surface of the transfer body (110) and the outer surface of the transfer pipe (111) while enclosing the plurality of cylinders (130).

[0136] FIG. 10 is a block diagram schematically illustrating a construction method using an expansion traction device without cross-sectional loss, which is an embodiment of the present invention.

[0138] Next, a construction method using an expansion traction device without cross-sectional loss, which is an embodiment of the present invention, is largely composed of the following steps as shown in FIG. 10: a) a step of preparing the propulsion pipe and traction part (hereinafter referred to as 'step a'), b) a step of installing the propulsion pipe and traction part (hereinafter referred to as 'step b'), c) a step of connecting the propulsion pipe and traction part (hereinafter referred to as 'step c'), d) a step of connecting the lead pipe (hereinafter referred to as 'step d'), e) a step of crushing and replacing the aging pipe (hereinafter referred to as 'step e'), f) a step of connecting the main pipe (hereinafter referred to as 'step f'), g) a step of subsequently crushing and replacing the aging pipe (hereinafter referred to as 'step g'), h) a step of subsequently connecting the main pipe (hereinafter referred to as 'step h'), and i) a step of completing the replacement of the aging pipe (hereinafter referred to as 'step i').

[0139] First, step a) above is a step of preparing the propulsion pipe (10) and the towing part (20) of the expansion towing device without cross-sectional loss.

[0141] Figure 11 is a cross-sectional view schematically showing an aging pipe buried underground.

[0143] Next, step b) is a step of installing the propulsion pipe (10) at the starting point of replacement of the aging pipe (2) and installing the traction part (20) at the ending point of replacement of the aging pipe (2).

[0144] First, as shown in FIG. 11, at the rear side of the aging pipe (2), which is the starting point for replacing the aging pipe (2), and at the front side of the aging pipe (2), which is the ending point for replacing the aging pipe (2), manholes (8, 9) that are connected to the aging pipe (2) may be located respectively.

[0145] The inner wall surface of the above manhole (8, 9) is finished with a support member (81, 91) respectively, and a manhole cover (82, 92) may be horizontally provided on the upper part of the above manhole (8, 9).

[0147] Figure 12 is a cross-sectional view schematically showing the preparation process of the traction part.

[0149] With the manhole cover (82, 92) separated from the manhole (8, 9), the winch (210) of the traction unit (20) can be prepared in a positioned state on the ground around the upper part of the manhole (8) located at the end point of replacement of the old pipe (2), as shown in FIG. 12.

[0151] Figure 13 is a cross-sectional view schematically showing the preparation process of the thrust pipe and the state in which the thrust pipe and the traction part are connected.

[0153] And, as seen in FIG. 13, the propulsion pipe (10) can be prepared to be accommodated inside a manhole (9) located at the starting point of replacement of the aging pipe (2).

[0154] Next, step c) is a step of connecting the rear side of the towing line (220) of the towing section (20) to the front side of the propulsion pipe (10) while the rear side of the towing line (220) of the towing section (20) passes through the interior of the aging pipe (2), as seen in FIG. 13.

[0156] FIG. 14 is a cross-sectional view schematically showing the state in which the thrust pipe is transferred into the interior of the aging pipe, and FIG. 15 is a cross-sectional view schematically showing the state in which the thrust pipe and the lead pipe are connected.

[0158] Next, step d) is the step of connecting the lead pipe (11) to the rear side of the propulsion pipe (10).

[0159] In order to easily form a space for connecting the propulsion pipe (10) and the lead pipe (11) inside the manhole (9) located at the rear of the old pipe (2), which is the starting point for replacing the old pipe (2), as shown in FIG. 14, the transport body (110) of the propulsion pipe (10) can be brought into the rear interior of the old pipe (2) by the traction unit (20) or a worker, etc., for a certain length.

[0160] In this state, the lead tube (11) can be connected to the rear side of the propulsion tube (10) as shown in FIG. 15.

[0162] Figure 16 is a cross-sectional view schematically showing the state in which a portion of the old pipe is crushed by the propulsion pipe.

[0164] Next, step e) is a step in which a plurality of crushing plates (120) of the propulsion pipe (10), located inside the rear side of the aging pipe (2) at the starting point for replacing the aging pipe (2) as shown in FIG. 16, crush a part of the aging pipe (2).

[0166] FIG. 17 is a cross-sectional view schematically showing the state in which a lead pipe and a main pipe connected to the lead pipe are transferred into the interior of an aging pipe together with a propulsion pipe.

[0168] Next, step f) is the step of connecting the front side of one of the main tubes (12) to the rear side of the lead tube (11) as seen in FIG. 17.

[0170] FIG. 18 is a cross-sectional view schematically showing a state in which a portion of the aging pipe is crushed again by the propulsion pipe, and FIG. 19 is a cross-sectional view schematically showing a state in which the lead pipe and the main pipe are transported again into the interior of the aging pipe together with the propulsion pipe.

[0172] Next, step g) is a step of transporting the propulsion pipe (10) again through the traction unit (20) as seen in FIGS. 17 to 19, thereby crushing a portion of the aging pipe (2) again by the transport distance, and positioning the lead pipe (11) and the main pipe (12) in the area of ​​the crushed aging pipe (2).

[0173] Next, step h) is the step of connecting another main building (12) to the rear side of the main building (12) as shown in FIG. 19.

[0175] FIG. 20 is a cross-sectional view schematically showing the state in which the propulsion pipe has been transferred to the point where the replacement of the old pipe has been completed, and FIG. 21 is a cross-sectional view schematically showing the state in which the propulsion pipe has been separated from the lead pipe.

[0177] Next, step i) is a step in which the entire old pipe (2) is crushed by alternating steps g) and h), and the propulsion pipe (10) that has been introduced into the manhole (8) located at the point where the replacement of the old pipe (2) is completed as shown in FIG. 20 is separated from the lead pipe (11) as shown in FIG. 21, thereby completing the replacement of the old pipe (2).

[0178] The propulsion pipe (10), separated from the lead pipe (11), can be lifted to the ground around the upper part of the manhole (8) located at the end point of replacement of the aging pipe (2), as seen in FIG. 19.

[0179] As described above, the present invention has the advantage of being able to more easily replace the aging pipe (2) buried underground without excavating the surface and without cavitation, by means of the propulsion pipe (10) which positions the lead pipe (11) and the plurality of main pipes (12) inside the aging pipe (2) by means of the traction part (20) which intermittently transports the plurality of crushing plates (120) into the interior of the aging pipe (2) through the plurality of cylinders (130) to crush the aging pipe (2) and position the lead pipe (11) and the plurality of main pipes (12) inside the crushed aging pipe (2). Explanation of the symbols

[0181] 10; propulsion pipe, 110; transfer body, 111; transfer pipe body, 120; crushing plate section, 130; cylinder, 20; traction part.

Claims

Claim 1 The apparatus comprises a conveying body that is conveyed into the interior of an aging pipe; a conveying pipe body provided on the inner side of the conveying body and conveyed into the interior of the aging pipe together with the conveying body; a conveying frame formed protruding outward from the rear side of the conveying body and conveyed into the interior of the aging pipe together with the conveying body; a soil inflow prevention plate formed extending a certain length outward from the rear side of the conveying body while wrapping the conveying frame; a plurality of crushing plate sections formed radially divided into multiple parts on the outer side of the conveying body and expanding toward the inner surface of the aging pipe to pressurize and crush the aging pipe during the process of being conveyed into the interior of the aging pipe along the conveying body; and a plurality of cylinders provided radially between the plurality of crushing plate sections and the conveying pipe body while penetrating the conveying body, wherein the plurality of cylinders move the plurality of crushing plate sections from the outer side of the conveying body toward the inner surface of the aging pipe, and the plurality of cylinders move the plurality of crushing plate sections An expansion traction device without cross-sectional loss, characterized by comprising: a propulsion pipe that returns to its original position in the outer direction of the transfer body from the inner surface of the aging pipe; and a traction part that pulls the propulsion pipe into the interior of the aging pipe. Claim 2 An expansion traction device without cross-sectional loss according to claim 1, characterized in that an inclined surface is formed on the front outer circumference of the conveying body of the propulsion pipe, which gradually slopes inward toward the conveying body as it moves from the rear to the front direction of the conveying body. Claim 3 An expansion traction device without cross-sectional loss according to claim 1, characterized in that an inclined surface is formed on the front outer circumference of the transfer frame, gradually sloping inward toward the transfer frame as it moves from the rear side to the front side of the transfer frame. Claim 4 An expansion traction device without cross-sectional loss according to claim 1, characterized in that the propulsion tube comprises a plurality of reinforcing frames radially provided on the inner front side of the transfer body; and a cover frame provided between the inner surface of the transfer body and the outer surface of the transfer tube body while enclosing the plurality of cylinders. Claim 5 An expansion traction device without cross-sectional loss according to claim 1, characterized in that a crushing blade portion is formed on the outer surface of each of the plurality of crushing plate portions, protruding to a certain height in the outward direction of the plurality of crushing plate portions. Claim 6 An expansion traction device without cross-sectional loss according to claim 1, characterized in that a lead pipe is connected to the rear side of the conveying body of the propulsion pipe and is pulled into the interior of the aging pipe along the propulsion pipe, and a plurality of main pipes are sequentially connected to the rear side of the lead pipe and are pulled into the interior of the aging pipe along the lead pipe. Claim 7 An extended traction device without cross-sectional loss according to claim 1, characterized in that the traction unit comprises: a traction line winch; and a traction line provided between the traction line winch and the transfer body of the propulsion pipe, connecting the traction line winch and the transfer body, and unwinding from the traction line winch and winding onto the traction line winch. Claim 8 An expansion traction device without cross-sectional loss according to claim 1, characterized in that the plurality of cylinders of the propulsion pipe are hydraulic cylinders, and the propulsion pipe is connected to the transfer pipe body and comprises a hydraulic line that supplies hydraulic pressure to be supplied to the hydraulic cylinders forming the plurality of cylinders into the interior of the transfer pipe body. Claim 9 An expansion traction device without cross-sectional loss, characterized in that, in claim 8, the propulsion tube comprises a flow detection member that detects the flow rate of the fluid passing through the hydraulic line. Claim 10 An expansion traction device without cross-sectional loss, characterized in that, in claim 1, the thrust tube comprises a camera member provided on the front side of the transfer tube body of the thrust tube. Claim 11 a) a step of preparing a propulsion pipe and a traction part of an expansion traction device without cross-sectional loss according to any one of claims 1 to 10; b) a step of installing a propulsion pipe and a traction part of the expansion traction device without cross-sectional loss at the starting point of replacement of the aging pipe and installing a traction part of the expansion traction device without cross-sectional loss at the ending point of replacement of the aging pipe; c) a step of connecting a propulsion pipe and a traction part of the propulsion pipe and a traction part of the expansion traction device; d) a step of connecting a lead pipe to the propulsion pipe; e) a step of crushing and replacing an aging pipe by transporting the propulsion pipe connected to the lead pipe into the interior of the aging pipe and crushing a portion of the aging pipe located at the starting point of replacement of the aging pipe with the propulsion pipe; f) a step of connecting a main pipe to the rear side of the lead pipe; and g) a step of transporting the propulsion pipe again through the traction part to crush a portion of the aging pipe again by the transport distance, and positioning the lead pipe and the main pipe in the area of ​​the crushed aging pipe. A construction method using an expansion traction device without cross-sectional loss, characterized by comprising: a crushing and replacement step; h) a main pipe subsequent connection step in which another main pipe is connected to the rear side of the main pipe; and i) a aging pipe replacement completion step in which the g) aging pipe subsequent crushing and replacement step and the h) main pipe subsequent connection step are alternately and repeatedly performed so that the propulsion pipe located at the point of completion of replacement of the aging pipe is separated from the lead pipe when the crushing of the aging pipe is completed, thereby completing the replacement of the aging pipe. Claim 12 delete

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