KR101957713B1 - Method for Reparing the Pipe using a Protect Guard and Thermostat in Work Zone - Google Patents

Abstract

Disclosed is a method for repairing a pipe using a protection guard and an insulation case installed in a work zone to stably support the pipe, the method comprising: a step of forming a pit with a predetermined depth; a step of installing a plurality of vertical beams perpendicular to an edge part of the pit and fixing and installing a horizontal beam on a top of the vertical beams adjacent to each other; a step of arranging a plurality of earth retaining plates between wall surfaces of the vertical beam and the pit, and arranging one of the earth retaining plates to allow a bottom end to be in contact with a protection guard, which surrounds a part of an outer surface of a pipe while a lower end is supported to a bottom surface of the pit; a step of inserting a repair pipe into the cut pipe; a step of fixing and installing a steam injection hose to one end of the repair pipe and then primarily supplying steam into the repair pipe to soften the repair pipe; a step of fitting and fixing a closing cap with a steam injection hole to both ends of the repair pipe, secondarily pressurizing and supplying steam into the repair pipe through the steam injection hole, and pressing and expanding the repair pipe to allow the repair pipe to be attached and fixed on an inner surface of the pipe by the pressurized and supplied steam; a step of cooling the repair pipe attached and fixed on the inner surface of the pipe in order to separate the closing cap from both the ends of the repair pipe; a step of preheating a thermal bonding heat plate to be heated up to a preset temperature inside an insulation case; and a step of allowing the thermal bonding heat plate separated from the insulation case to be in contact with an end part of the repair pipe protruding from the pipe so as to thermally bond the repair pipe to a connection flange.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of repairing a conduit using a protective guards and a thermally insulated case installed in a work site,

The present invention relates to a method of constructing a work space for a space for repairing a conduit by forming a pit having a certain depth to expose a conduit as a maintenance object and installing a beam structure, The present invention relates to a method for repairing a conduit using a heat-insulating case that keeps a worn hot plate warm,

Generally, conduits buried at a certain depth below the ground, such as sewer pipes or water pipes, are made of concrete or metal material in the form of a cylindrical hollow tube. As time passes, they are corroded due to oxidation or microbial action, Or breakage occurs.

In order to replace such aged conduits, it is necessary to control the road traffic and excavate roads, which causes traffic problems and requires a lot of expenses. Therefore, it is necessary to excavate the workplaces at regular intervals in the buried conduit, A method of repairing a conduit by partially exposing a conduit, cutting it, and inserting a polyethylene liner into the old conduit is known.

(Patent Document 1) KR10-2017-0010294A

Patent Document 1 discloses a liner field connection inserting process in which a folding liner wound around a folding liner roll is inserted into a fallen liner while connecting a folding liner of another folding liner roll to each other, And a liner for pressurizing and expanding the liner by applying a high temperature to the inner surface of the throat tube to tightly adhere the liner to the inner surface of the throat tube, A liner insertion process for inserting a folded liner wound in a lengthwise direction, a liner connection process for connecting a folded liner inserted into a sagittal tube to another folded-up liner roll at a subsequent stage, and a liner connection process for continuously connecting the folded- Linking the liner back to the wrinkle regenerating process And a method of construction is disclosed.

However, in the conventional construction method, a work hole is formed to expose a part of the buried old conduit, and in the process of installing the earth retaining plate, the impact due to the direct contact between the old conduit and the heavy earth retaining plate, A problem has occurred.

In addition, in the repair process of connecting the end portion of the polyethylene pipe to the inside of the aged pipe, the end portion of the pipe is heated to a high temperature. There is a problem that the risk of safety accidents such as burns is always exposed in the process of the worker transporting the heating plate as a heavy material.

In addition, it takes too much time to heat the hot plate, which is exposed in the open air and is difficult to maintain, to a high temperature, thereby causing a problem of lowering work productivity.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide an apparatus and method for preventing deterioration of an aged conduit due to an earth retaining plate, To provide a method of repairing and installing a conduit using a protective guard and a heat insulating case which can fundamentally prevent an operator's burn caused by a heating plate heated by a high temperature at a time and heat the heating plate in a short time without heat loss do.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

As a specific means for achieving the above object, a preferred embodiment of the present invention includes: forming a pit having a certain depth to expose a conduit buried beneath the ground; Providing a plurality of vertical beams perpendicular to the edges of the pits and providing a beam structure for fixing horizontal beams to upper ends of adjacent vertical beams; A plurality of earth retaining plates are disposed between the vertical beams and the wall surface of the pits and one of the plurality of earth retaining plates is supported on the bottom surface of the pits so that the lower ends thereof contact the protective guards surrounding a part of the outer surface of the conduits Preparing a workpiece by arranging the workpiece; Cutting a conduit exposed in the pit, and inserting a repair pipe into the cut conduit; A steam inlet hose is fixed to one end of a maintenance pipe inserted into the conduit, and then the steam is first supplied to the inside of the maintenance pipe to soften the maintenance pipe; And a sealing cap having a steam inlet is fixed to both ends of the maintenance pipe. Then, steam is supplied to the inside of the maintenance pipe through the steam inlet at a secondary pressure, and steam is supplied to the inside of the maintenance pipe Pressurizing and expanding the maintenance pipe so as to be tightly fixed; Cooling the repair pipe closely fixed to the inner surface of the conduit to separate the sealing cap from both ends of the repair pipe; Preparing a warming case for disposing a fusing heat plate that generates heat when power is applied in an inner space and preheating the fusing heat plate to be heated to a predetermined temperature inside the warming case; And a step of thermally fusing the repair pipe to the connection flange by bringing the fusing heat plate separated from the heat insulating case into contact with the end portion of the repair pipe protruding from the conduit after fixing the connection flange to the end of the conduit, The present invention provides a method of repairing and installing a conduit using a protective guards and a heat insulating case provided in the conduit.

Preferably, the protective guards include a 'c' -shaped cross-sectional shape steel member bent in a curved convex shape, the shape steel member having a support plate for generating surface pressure in contact with the bottom surface of the pit, And may include an anchor that is inserted at a predetermined depth into the surface to generate a clamping force.

Preferably, the protection guard may include a support bar horizontally disposed so as to be inserted into the connection hole formed in the protection guard so as to support and support a lower portion of the conduit spaced apart from the bottom surface of the pit.

Preferably, the softening of the repair pipe may include fixing the steam injection hose by connecting the steam injection hose to the middle of the length of the fixing wire connected to the pair of connection rings provided on the protection guard.

Preferably, the step of pressurizing and expanding the maintenance pipe includes passing the other end of the traction wire, one end of which is connected to the sealing cap, through a pair of connection rings provided on the protection guard, And pressing the sealing cap into the end portion of the maintenance pipe.

Preferably, the step of cooling the maintenance pipe may include fixing the other end of the pulling wire, one end of which is connected to the sealing cap press-fitted to both ends of the maintenance pipe, to a pair of connection rings provided on the protection guard, And minimizing shrinkage deformation of the cooling pipe to be cooled.

Preferably, the fusing heat plate includes a support structure connected to an upper end of a heating plate body that generates heat when power is applied, and a hook ring provided at an upper portion of the support structure and connected to a hook of the crane portion, And a heat insulating member having an opening opened upward to allow the body to enter and exit and an opening portion which is opened by the support structure is sealed, wherein the warming body has a fixing portion corresponding to a connection hole formed in the earth retaining plate, And can be detachably fixed to the earth retaining plate.

Preferably, the fusing heat plate includes a support structure connected to an upper end of a heating plate body that generates heat when power is applied, and a hook ring provided at an upper portion of the support structure and connected to a hook of the crane portion, A lower cover which seals an opened lower end of the thermostat, and a lower cover which seals the upper end of the thermostat and seals the lower end of the thermostat, And may include a side cover.

More preferably, the heat insulating case includes an anti-fall pin member inserted through a fin hole formed in the vicinity of a lower end of the slot, so that the heat insulating case can maintain the raised state due to interference between the fall preventing pin member and the support structure.

More preferably, the crane unit comprises a linkage provided at an upper end of the vertical frame to which the lower end is fixedly installed to the beam structure, a horizontal frame having one end rotatably assembled to the rotation bar of the linkage, And a chain that is wound around the chain block with a hook that engages with a hook ring of the fusing heat plate.

According to a preferred embodiment of the present invention as described above, the following effects can be obtained.

1) By supporting the earth retaining plate through the protective guards placed on the cut conduit, it is possible to prevent the direct contact between the aged conduit and the earth retaining plate which is heavy, so that the old conduit is stably supported while preventing further damage and damage , And can be safely protected.

2) It is possible to reduce the time required to heat the fused heat plate to a predetermined temperature by heating the fused heat plate used for heat welding of the maintenance pipe to a high temperature in the internal space of the heat-sealed case which is blocked from the external environment, Since it is possible to prevent contact with the operator, it is possible to reduce the time required for heat generation, thereby improving work productivity and preventing burn incidents of the operator.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view illustrating a process of forming a pit in a method of repairing and installing a conduit using a protective guards and an insulating case according to a preferred embodiment of the present invention.
FIG. 2 is a view illustrating a process of installing a beam structure in a conduit repairing method using a protective guard and a heat insulating case according to a preferred embodiment of the present invention.
3 is a view illustrating a process of preparing a work tool in a method of repairing and installing conduits using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
4A and 4B are a perspective view and an installation state view showing a protective guard employed in a method of repairing and installing a conduit using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
FIG. 5 is a view illustrating a process of inserting a maintenance pipe in a method of repairing and installing a conduit using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
6 is a view illustrating a process of softening a repair pipe in a method of repairing and installing a conduit using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
FIG. 7 is a view illustrating a process of pressurizing and expanding a maintenance pipe in a method of repairing and installing a conduit using the protective guards and the heat insulating case according to a preferred embodiment of the present invention.
FIG. 8 is a view illustrating a process of thermally fusing a maintenance pipe in a method of repairing and installing a conduit using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
FIG. 9 is a perspective view illustrating a fusing heat plate and a heat insulating case used in a method of repairing a conduit using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
10A and 10B are views illustrating a method of thermally pressing a maintenance pipe and a connection flange in a method of repairing and installing a conduit using a protective guard and a heat insulating case according to a preferred embodiment of the present invention.
11 is a perspective view showing another embodiment of a thermal insulation panel and a thermal insulation panel used in a method of repairing a conduit using a protective guard and a thermal insulation case according to a preferred embodiment of the present invention.
12 is an exploded perspective view showing another embodiment of a heat insulating case used in a method of repairing and installing conduits using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.
13 is a cross-sectional perspective view showing another embodiment of a heat insulating case used in a method of repairing and installing a conduit using a protective guards and a heat insulating case according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

The same reference numerals are used for portions having similar functions and functions throughout the drawings.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to include an element does not exclude other elements unless specifically stated otherwise, but may also include other elements.

As shown in FIGS. 1 to 4, a method of repairing and installing a conduit using a protective guards and an insulating case according to a preferred embodiment of the present invention includes steps of forming a pit, installing a beam structure, , Inserting the maintenance pipe, softening the repair pipe, pressurizing and expanding the repair pipe, cooling the repair pipe, preheating the heat transfer plate, and heat sealing the repair pipe to the connection flange can do.

As shown in FIG. 1, the step of forming the pit 10 includes dugging the soil from the ground using a heavy equipment such as a fork-crane, thereby removing the aged conduit P, The pits 10 having a predetermined depth are formed so as to be exposed.

2, the step of installing the beam structure 20 includes vertically arranging a plurality of vertical beams 22 whose lower ends are pushed into the bottom surface of the pit at a predetermined depth for each corner of the pits 10 Install and fix.

Subsequently, horizontal beams 24 whose both ends are fixed by welding are connected to the upper ends of the adjacent vertical beams 22 so as to support a plurality of vertical beams and a plurality of And a beam structure 20 composed of a horizontal beam and supported and fixed to the bottom surface of the pit is installed in the inner space of the pit 10. [

3, the step of preparing the workpieces is performed between the vertical beam 22 of the beam structure and the wall surface of the pit so that the gypsum forming the wall surface of the pit is prevented from collapsing to the inside, And the earth retaining plate 25 of a substantially rectangular plate shape is inserted and arranged.

At this time, the earth retaining plate 25 may be made of an iron plate, but it is not limited thereto, and it may be a wood plate which is stacked in multiple stages.

A substantially U-shaped protective guard 30 is installed on the conduit P exposed to the pit and is bent so as to enclose a part of the outer surface of the upper side of the conduit. do.

In this case, any one of the plurality of the earth retaining plates 25 corresponding to the conduit may be formed so that the arc-shaped cut-out portion 25a, which is formed at the lower end thereof, is in contact with the outer surface of the protective guard 30, And inserted between the vertical beam and the inner surface of the pit.

A sheathing board 25 is mounted between the vertical beam 22 of the beam structure and the inner surface of the pit via a protective guard 30 surrounding the upper outer surface of the conduit P, It is possible to prevent the deteriorated conduit from being damaged before the repair work or unnecessarily damaging the conduit due to the external impact transmitted while being brought into contact with the iron plate on the outer surface of the deteriorated conduit or being directly contacted.

4, the protective guard 30 includes a shape of a 'c' -shaped section steel member 31 bent in a convex curved shape. The shape steel member 31 has a pit 10), and an anchor (33) extending from the support plate (32) is provided, so that the support guard (32) It is possible to generate the support fixing force of the protection guard by the anchor 33 inserted at a certain depth into the surface.

The protection guard 30 includes a support bar 34 for supporting and supporting a lower portion of a conduit P spaced a predetermined height from the bottom surface of the pit 10, And a bar member having a predetermined length horizontally inserted into the connection hole.

The supporting bar 34, which is horizontally assembled to the protective guard and supports the lower portion of the conduit, adjusts a position where the conduit P is assembled to the connecting hole in accordance with the outer diameter of the conduit P, .

In the step of inserting the repair pipe 40, the middle of the length of the conduit P exposed in the pit is cut, and then the repair pipe is inserted into the cut pipe.

That is, the repair pipe (40) folded into a U shape at the time of factory production is unrolled in a rolled state on the rotary shaft and enters the inlet of the cut duct of the work.

One end of the maintenance pipe which is introduced to the inlet side of the cut conduit is connected to a pulling device such as a winch via a pull string, and this pulling device (not shown) is disposed on the ground corresponding to the outlet side of the cut pipe, The maintenance pipe can be pulled by the external force of the traction device to the outlet side of the other end of the cut pipe, and the repair pipe 1 folded in a substantially U shape inside the pipe can be inserted and arranged.

In this case, when the folded repair pipe is unscrewed from the reel part and inserted into the cut pipe, the outer surface of the repair pipe coming into contact with the inner surface of the pipe is scratched or damaged while contacting the beam structure. When the repair pipe inside the conduit is inflated by forcible injection into the inside of the repair pipe, the repair pipe may be frayed due to the tearing of the damage area, resulting in a fatal construction failure. Therefore, the maintenance pipe entering the vertical beam or the horizontal beam of the beam structure It is preferable to provide a protective material such as a cloth member so as to absorb the shock caused by the contact of the maintenance pipe and to prevent scratching of the outer surface of the maintenance pipe.

As shown in FIG. 6, the step of softening the maintenance pipe 40 may be performed by fixing a steam injection hose 45 to one end of a maintenance pipe inserted into a conduit, Deg.] C or more to supply the inside of the maintenance pipe to soften the maintenance pipe 40 made of a polyethylene material.

That is, when high-temperature steam is supplied to the inside of the maintenance tube through the steam injection hose 45, the maintenance tube heated and heat-exchanged with the high-temperature steam is changed from a hard state to a soft state, So that it can be smoothly softened so as to be smoothly performed.

The steam injection hose 45 is bundled in the middle of the length of a fixed length of the fixed wire 46 having both ends connected to the pair of connection rings 47 provided in the steel member 31 of the protective guard 30, And is fixedly fixed to the protective guards.

The steam injection hose 45 for supplying the high temperature steam to the inside of the maintenance pipe 40 inserted into the conduit P is fixed to the protection guard by the fixing wire 46, The steam injection hose is separated from the maintenance pipe to prevent a safety accident that causes an image caused by steam to an adjacent worker.

In addition, a finishing material (not shown) such as a cloth material is inserted into the one end of the maintenance tube where the steam injection hose 45 is fixed to temporarily prevent the high-temperature steam supplied to the outside from being discharged to the outside, It is preferable to temporarily finish the steam as the finishing material so as to prevent the steam from leaking to the outside.

The step of pressurizing and expanding the maintenance pipe 40 may include a steam inlet port 49 connected to the steam injection line 49 at both ends of the repair pipe 40 exposed to the end of the cut pipe, 52 are press-fitted into the cylindrical sealing cap 50, respectively.

The steam is then supplied to the inside of the maintenance pipe 40 by the second pressure by supplying the steam to the inside of the maintenance pipe 40 by the opening operation of the valve provided in the steam injection port 52. As a result, The maintenance pipe is pressurized and inflated by the steam pressurized and supplied to the inside of the pipe 40, and is tightly fixed to the inner surface of the pipe.

That is, when the steam of about 120 ° C is forcedly injected through the steam inlet of the sealing cap 50, the maintenance pipe is softened by steam forcibly injected, and the softened maintenance pipe 40 is forced into the inner space And is tightly fixed to the inner surface of the aged conduit.

At this time, the temperature of steam forcibly injected into the one end of the maintenance tube through the steam injection port of the one-side sealing cap is measured by measuring in real time the steam discharged through the steam inlet of the other sealing cap pressed into the other end of the maintenance pipe .

The sealing cap 50 is connected to one end of a pair of traction wires 53 and the other end of the traction wire 53 passes through a pair of connection rings provided on a section of the protection guard 30 Next, the pulling wire can be press-fitted into the open end of the maintenance pipe to the outside of the sealing cap 50 in the direction away from the sealing cap.

Accordingly, it is possible to prevent the noise pollution caused by the worker hitting by using a tool such as a hammer by pressing and fixing the sealing cap 50 to the open end of the repair pipe, and to prevent the sealing cap from being damaged or damaged It can be prevented.

 The step of cooling the maintenance pipe (40) is to cool the pressurized and expanded expanded maintenance pipe so as to be closely fixed to the inner surface of the conduit, and then to separate the pressurized and sealed cap at both ends of the maintenance pipe.

Here, the step of cooling the maintenance pipe 40 may be forcibly performed by separating the steam injection line connected to the steam injection port and forcibly supplying cold air having a temperature lower than the ambient temperature, but is not limited thereto, It can be slowly cooled.

At this time, the other end of the pulling wire 53, one end of which is connected to the sealing cap 50 press-fitted to both ends of the maintenance pipe 40, The shrinkage deformation in the longitudinal direction of the maintenance pipe that is cooled inside the conduit can be minimized by being connected to the ring 47 and fixing it to maintain a taut state.

In this case, both ends of the maintenance pipe 40, which is cooled inside the conduit, are fixed to the protection guard via the pulling wire connected to the sealing cap, so that the entire length of the maintenance pipe contracted during cooling of the repair pipe is reduced Both ends of the maintenance pipe can be prevented from entering the inside of the conduit.

When cooling of the maintenance pipe is completed, the pulling wire is released to release the sealing cap, and the sealing cap is separated from both ends of the repair pipe.

As shown in FIGS. 8 and 9, the step of preheating the fusing heat plate includes a fusing heat plate 60 that generates heat at a predetermined temperature of 200.degree. C., which allows heat fusion of the polyethylene pipe The heat insulating case 70 is disposed in the space and preheated at a predetermined temperature in the internal space of the heat insulating case 70 so that the heat welding process can be performed.

The fusing heat plate 60 includes a support structure 62 connected to an upper end of a heating plate body 61 on a disk that generates heat in an electric resistance manner when power is applied thereto, And a hook ring 63 connected to the hook 85a of the hook hook 85a.

The heat insulating case 70 includes a thermostat 71 having an opening that is opened upward to allow the heating plate 61 to enter and exit and an opening portion that is opened by the supporting structure 62 is closed, (71) has a fixing portion (71a) corresponding to the connection hole (25b) formed in the earth retaining plate (25) and having a heat insulating material to prevent the temperature of the heating plate body, And can be fixed in position so as to be attachable to and detachable from the earth retaining plate (25) by a fastening member.

Here, the heating plate body 61 is a heating member having a circular hole formed at the center of the body and having a handle 64 so that the operator can handle the both sides of the circular plate. The support structure 62 is supported by the heating plate body 61 Sectional shape of the steel member connected to the upper end of the heating plate body by the fastening member and having a length corresponding to the diameter of the heating plate body.

Accordingly, the fusing heat plate 60 is stored in the thermosensitive body of the heat-insulating case temporarily fixed to the earth retaining plate, and is heated and waits while waiting, Is transported and transported to the working position by the crane unit (80).

After the heat-sealing process is completed, the box body is re-stored in the thermosensitive body of the thermostat case and is temporarily fixed to the turntable.

Here, the support structure is shown to be composed of a beam structure having a certain length so as to block the opened upper portion of the thermostat, while connecting the heating plate and the hook ring to each other. However, the support structure is not limited thereto, And a simple block that connects the hook rings to each other.

As shown in FIG. 8, the crane unit 80 for conveying and transporting the fusing heat plate 60 includes a linkage 82 provided at an upper end of a vertical base 81 to which a lower end is fixed to the beam structure And a horizontal block 83 having one end rotatably mounted on the rotation bar 82a of the link block 82 and having a wheel 84a slidably moved in the horizontal direction along the horizontal block, And a chain 85 wound around the chain block 84 with a hook 85a engaged with the hook ring of the fusing heat plate.

Accordingly, the hook ring 63 provided on the fusing heat plate is interlocked with the hook 85a provided on the chain of the crane part, so that the fusing heat plate 60 is pulled out of the chain wound on the chain block And is moved in the horizontal direction together with the horizontal movement of the chain block having the wheel while being rotated together with the horizontal base rotatably assembled to the rotary bar, And can be transported and moved to reciprocate.

At this time, the crane unit is fixedly installed on the horizontal beam of the beam structure fixedly installed in the pit, but the present invention is not limited thereto, and the crane unit may be installed on a pedestal mounted on the ground.

As shown in FIGS. 10A and 10B, the step of thermally fusing the maintenance pipe to the connection flange includes the steps of: connecting a connection conduit (not shown) corresponding to the cut portion to the end portion of the conduit P The flange P1 is fixed by a welding method and then the heating plate 61 of the fusing heat plate 60 separated from the heat insulating case 70 is connected to a maintenance pipe 40 so as to face each other.

In this state, when one side of the heating plate heated to a high temperature is pressed toward the conduit while being in contact with the end of the maintenance pipe, the end of the maintenance pipe is melted by the heating plate body and is thermally fused integrally with the connection flange P1 .

At this time, in the state where the disc-shaped PE plug (P2) made of the same material as that of the maintenance pipe is disposed outside the heating plate body (61), the end of the maintenance pipe (40) When one side of the plug P2 is heated to melt the contact surface and then the heating plate body is lifted uprightly, the end portion of the maintenance pipe in which the contact surface is melted by the heating plate body and the PE plug are integrally formed And can be thermally fused.

As shown in FIG. 8, the heat insulating case 70 is temporarily fixed to the earth retaining plate 25, while the heating heat plate connected to the hook of the crane portion is independently transported and moved. However, As shown in FIGS. 11, 12 and 13, the heat insulating case 70 can be carried along with a heating plate connected to the hook of the crane unit.

The heating furnace 60 includes a support structure 62 connected to an upper end of a heating plate body 61 that generates heat when power is applied thereto and is provided on the support structure 62, And may include a ring 63.

The heat insulating case 70 includes a thermostat 70a formed on both sides of the elongated hole 73 to be coupled with the protruding member 62a provided at both ends of the supporting structure 62 and coupled to the supporting structure And a lower cover 74 for sealing the opened lower end of the thermosensitive body, and a side cover 73a for sealing the elongated hole 73.

The protruding member 62a is composed of a bolt member selectively fastened to the fastening holes formed at both ends of the support structure 62 located at the open upper portion of the thermostat 70a, However, the present invention is not limited thereto. The support structure 62 may be formed as an integral member protruding from both ends of the support structure 62 and located in the long hole.

The lower cover (74) is selectively separated to open the lower end of the thermosensitive body when the thermosensitive body relatively moves toward the upper side with respect to the thermosetting process, And is a lid member which is forced to seal the lower open end of the thermosensitive body when preheating the heat plate.

The side cover 73a is selectively separated so as to completely open the long hole of the thermosensor 70a when the thermosensor is relatively moved to the upper side with respect to the fusing heat plate for the thermal fusion process like the lower cover, Is a lid member that is forced to seal the elongated hole of the thermosensitive body in the preheating of the fusing heat plate in the inner space of the thermostat.

Accordingly, the fusing heat plate disposed in the internal space of the thermosensor 70a of the thermosensor 70a is thermally transferred to the thermosensor 70a carried by the crane 80 in a state waiting to maintain a high-temperature heating state, Is brought close to the end of the maintenance pipe (40) exposed from the conduit.

Then, the lower cover 74 provided at the opened bottom end of the thermosensitive body and the side cover 73a provided at the long hole are separated to completely open the lower end of the thermosensor case to fully open the slot.

In this state, when the heating element 70a is directly moved upward relative to the fusing heat plate 60, which is hooked to the hook of the crane portion by hooking and hooking in a stationary state, Since the protruding members are located in the elongated openings formed on both sides of the heat insulating case, the heating plate body of the heat welding plate is externally exposed so as to face the end of the heat exchanger tube.

At this time, when the supporting structure is positioned at the open lower end of the thermosensitive body, the thermosensitive case 70, which is relatively moved upright so as to expose the heating plate of the thermosetting thermosetting plate 60, The raised state is maintained by the interference between the fall preventing pin member 73b inserted through the through-hole formed and the supporting structure 62, and the exposed state of the heating plate body is maintained.

  When the thermal welding between the maintenance pipe and the connection flange is completed, the thermal insulation is lowered and returned by the separation of the falling prevention pin member to store the thermal expansion plate 60 in the inner space of the thermal insulation, It is returned to the home position by the crane portion and the next process is prepared.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

10: feet
20: beam structure
30: Protection guard
32: Support plate
33: Anchor
40: Maintenance shop
50: sealing cap
60: Fused Warm Plate
61: heating plate body
62: support structure
63: Hook ring
70: Insulation case
70a, 71: thermostat
73: Slots
73a: side cover
74: Lower cover
80: Crane section

Claims (8)

delete Forming a pit having a certain depth to expose a conduit buried beneath the ground;
Providing a plurality of vertical beams perpendicular to the edges of the pits and providing a beam structure for fixing horizontal beams to upper ends of adjacent vertical beams;
A plurality of earth retaining plates are disposed between the vertical beams and the wall surface of the pits and one of the plurality of earth retaining plates is supported on the bottom surface of the pits so that the lower ends thereof contact the protective guards surrounding a part of the outer surface of the conduits Preparing a workpiece by arranging the workpiece;
Cutting a conduit exposed in the pit, and inserting a repair pipe into the cut conduit;
A steam inlet hose is fixed to one end of a maintenance pipe inserted into the conduit, and then the steam is first supplied to the inside of the maintenance pipe to soften the maintenance pipe;
And a sealing cap having a steam inlet is fixed to both ends of the maintenance pipe. Then, steam is supplied to the inside of the maintenance pipe through the steam inlet at a secondary pressure, and steam is supplied to the inside of the maintenance pipe Pressurizing and expanding the maintenance pipe so as to be tightly fixed;
Cooling the repair pipe closely fixed to the inner surface of the conduit to separate the sealing cap from both ends of the repair pipe;
Preparing a warming case for disposing a fusing heat plate that generates heat when power is applied in an inner space and preheating the fusing heat plate to be heated to a predetermined temperature inside the warming case; And
And a step of thermally fusing the repair pipe to the connection flange by bringing the fusing heat plate separated from the thermal insulation case into contact with the end of the repair pipe protruded from the conduit,
Wherein the softening of the repair pipe comprises fixing the position of the steam injection hose by connecting the steam injection hose to the middle of the length of the fixing wire connected at both ends to a pair of connection rings provided in the protective guard, Maintenance method of conduit using guards and insulation case. Forming a pit having a certain depth to expose a conduit buried beneath the ground;
Providing a plurality of vertical beams perpendicular to the edges of the pits and providing a beam structure for fixing horizontal beams to upper ends of adjacent vertical beams;
A plurality of earth retaining plates are disposed between the vertical beams and the wall surface of the pits and one of the plurality of earth retaining plates is supported on the bottom surface of the pits so that the lower ends thereof contact the protective guards surrounding a part of the outer surface of the conduits Preparing a workpiece by arranging the workpiece;
Cutting a conduit exposed in the pit, and inserting a repair pipe into the cut conduit;
A steam inlet hose is fixed to one end of a maintenance pipe inserted into the conduit, and then the steam is first supplied to the inside of the maintenance pipe to soften the maintenance pipe;
And a sealing cap having a steam inlet is fixed to both ends of the maintenance pipe. Then, steam is supplied to the inside of the maintenance pipe through the steam inlet at a secondary pressure, and steam is supplied to the inside of the maintenance pipe Pressurizing and expanding the maintenance pipe so as to be tightly fixed;
Cooling the repair pipe closely fixed to the inner surface of the conduit to separate the sealing cap from both ends of the repair pipe;
Preparing a warming case for disposing a fusing heat plate that generates heat when power is applied in an inner space and preheating the fusing heat plate to be heated to a predetermined temperature inside the warming case; And
And a step of thermally fusing the repair pipe to the connection flange by bringing the fusing heat plate separated from the thermal insulation case into contact with the end of the repair pipe protruded from the conduit,
The step of pressurizing and expanding the maintenance pipe may include passing the other end of the traction wire having one end connected to the sealing cap through a pair of connection rings provided on the protection guard, And a step of press fitting and fixing the end portion of the maintenance pipe to the end portion of the maintenance pipe. Forming a pit having a certain depth to expose a conduit buried beneath the ground;
Providing a plurality of vertical beams perpendicular to the edges of the pits and providing a beam structure for fixing horizontal beams to upper ends of adjacent vertical beams;
A plurality of earth retaining plates are disposed between the vertical beams and the wall surface of the pits and one of the plurality of earth retaining plates is supported on the bottom surface of the pits so that the lower ends thereof contact the protective guards surrounding a part of the outer surface of the conduits Preparing a workpiece by arranging the workpiece;
Cutting a conduit exposed in the pit, and inserting a repair pipe into the cut conduit;
A steam inlet hose is fixed to one end of a maintenance pipe inserted into the conduit, and then the steam is first supplied to the inside of the maintenance pipe to soften the maintenance pipe;
And a sealing cap having a steam inlet is fixed to both ends of the maintenance pipe. Then, steam is supplied to the inside of the maintenance pipe through the steam inlet at a secondary pressure, and steam is supplied to the inside of the maintenance pipe Pressurizing and expanding the maintenance pipe so as to be tightly fixed;
Cooling the repair pipe closely fixed to the inner surface of the conduit to separate the sealing cap from both ends of the repair pipe;
Preparing a warming case for disposing a fusing heat plate that generates heat when power is applied in an inner space and preheating the fusing heat plate to be heated to a predetermined temperature inside the warming case; And
And a step of thermally fusing the repair pipe to the connection flange by bringing the fusing heat plate separated from the thermal insulation case into contact with the end of the repair pipe protruded from the conduit,
The step of cooling the maintenance pipe may include the steps of fixing the other end of the traction wire, one end of which is connected to the sealing cap press-fitted to both ends of the maintenance pipe, to a pair of connection rings provided on the protection guard, A method of repairing and installing a conduit using a protective guard and an insulating case installed in a work area, the method comprising the step of minimizing shrinkage deformation of the pipe. Forming a pit having a certain depth to expose a conduit buried beneath the ground;
Providing a plurality of vertical beams perpendicular to the edges of the pits and providing a beam structure for fixing horizontal beams to upper ends of adjacent vertical beams;
A plurality of earth retaining plates are disposed between the vertical beams and the wall surface of the pits and one of the plurality of earth retaining plates is supported on the bottom surface of the pits so that the lower ends thereof contact the protective guards surrounding a part of the outer surface of the conduits Preparing a workpiece by arranging the workpiece;
Cutting a conduit exposed in the pit, and inserting a repair pipe into the cut conduit;
A steam inlet hose is fixed to one end of a maintenance pipe inserted into the conduit, and then the steam is first supplied to the inside of the maintenance pipe to soften the maintenance pipe;
And a sealing cap having a steam inlet is fixed to both ends of the maintenance pipe. Then, steam is supplied to the inside of the maintenance pipe through the steam inlet at a secondary pressure, and steam is supplied to the inside of the maintenance pipe Pressurizing and expanding the maintenance pipe so as to be tightly fixed;
Cooling the repair pipe closely fixed to the inner surface of the conduit to separate the sealing cap from both ends of the repair pipe;
Preparing a warming case for disposing a fusing heat plate that generates heat when power is applied in an inner space and preheating the fusing heat plate to be heated to a predetermined temperature inside the warming case; And
And a step of thermally fusing the repair pipe to the connection flange by bringing the fusing heat plate separated from the thermal insulation case into contact with the end of the repair pipe protruded from the conduit,
Wherein the heating plate has a support structure connected to an upper end of a heating plate body that generates heat when power is applied thereto, and a hook ring provided at an upper portion of the support structure and connected to a hook of the crane portion,
The heat insulating case includes a thermostat having an opening that is opened upward to allow the heating plate to advance and retreat, and an opening portion that is opened by the supporting structure is closed, and the thermostat has a fixing portion corresponding to the connection hole formed in the fixing plate Wherein the securing member is detachably fixed to the earth retaining plate by a fastening member. Forming a pit having a certain depth to expose a conduit buried beneath the ground;
Providing a plurality of vertical beams perpendicular to the edges of the pits and providing a beam structure for fixing horizontal beams to upper ends of adjacent vertical beams;
A plurality of earth retaining plates are disposed between the vertical beam and the wall surface of the pit, and one of the plurality of earth retaining plates is supported on the bottom surface of the pit so that the lower end is contacted to the protective guard surrounding a part of the outer surface of the conduit Preparing a workpiece by arranging the workpiece;
Cutting a conduit exposed in the pit, and inserting a repair pipe into the cut conduit;
A steam inlet hose is fixed to one end of a maintenance pipe inserted into the conduit, and then the steam is first supplied to the inside of the maintenance pipe to soften the maintenance pipe;
And a sealing cap having a steam inlet is fixed to both ends of the maintenance pipe. Then, steam is supplied to the inside of the maintenance pipe through the steam inlet at a secondary pressure, and steam is supplied to the inside of the maintenance pipe Pressurizing and expanding the maintenance pipe so as to be tightly fixed;
Cooling the repair pipe closely fixed to the inner surface of the conduit to separate the sealing cap from both ends of the repair pipe;
Preparing a warming case for disposing a fusing heat plate that generates heat when power is applied in an inner space and preheating the fusing heat plate to be heated to a predetermined temperature inside the warming case; And
And a step of thermally fusing the repair pipe to the connection flange by bringing the fusing heat plate separated from the thermal insulation case into contact with the end of the repair pipe protruded from the conduit,
Wherein the heating plate has a support structure connected to an upper end of a heating plate body that generates heat when power is applied thereto, and a hook ring provided at an upper portion of the support structure and connected to a hook of the crane portion,
Wherein the heat insulating case includes a thermostat which is formed on both sides of the thermostat to have a long hole corresponding to a protruding member provided at both ends of the supporting structure and is coupled with the supporting structure, And a side cover that seals the long hole, wherein the protection guard and the heat insulating case are installed in the work area. The method according to claim 6,
The heat insulating case includes an anti-fall pin member inserted through a fin hole formed in the vicinity of a lower end of the elongated hole to maintain an elevated state due to interference between the fall preventing pin member and the support structure. Method of Repairing Conduit Using Protective Guard and Insulation Case. 8. The method according to any one of claims 5 to 7,
The crane unit includes a connecting block provided at an upper end of a vertical block to which the lower end is fixedly installed to the beam structure, a horizontal block having one end rotatably mounted on the rotating rod of the connecting block, And a chain wound around the chain block, the chain block having a wheel having a wheel and a hook which is engaged with a hook ring of the heat-melting plate, and a chain.

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