JP2006181861A - Lining execution method of existing pipe and pipe making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a lining pipe (regenerating pipe) in an existing pipe in a clearance-free state without locally bending a profile. <P>SOLUTION: A supply roller 4 for supplying the profile 100, which is newly wound from the inside of the already wound profile 100, to the already wound profile 100 is provided and the force in the direction reverse to the supply direction is allowed to act on the new profile 100 supplied to the already wound profile by the supply roller 4 to hold the already wound profile (the lining pipe during formation) to an always drawing state to dispense with an outer roller. By this constitution, even if a profile 100 of high rigidity is used, the lining pipe (regenerating pipe) can be formed within the existing pipe 200 in the clearance-free state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an existing pipe lining construction method for forming a lining pipe on the inner surface of an existing pipe such as an agricultural water pipe, a sewer pipe, a water pipe, and a gas pipe, and a pipe making machine used for the construction method.

  For existing pipes such as agricultural water pipes, sewer pipes, water pipes and gas pipes, the inner peripheral surface of the existing pipes should be lined with synthetic resin as a countermeasure when the existing pipes become obsolete due to cracks or corrosion. The method of rehabilitating the existing pipe is adopted.

  As a method for constructing a lining pipe on the inner surface of an existing pipe such as a sewer pipe, there is a method in which a long profile having fitting portions formed on both side edges is formed in a spiral shape in the existing pipe.

  For example, a drum around which a profile is wound is installed on the ground, and the profile is continuously supplied from the drum to a self-propelled pipe making machine arranged in the existing pipe, and the profile is spirally wound in the existing pipe, There has been proposed a method of forming a lining pipe by fitting side edge portions (fitting portions) of profiles adjacent to each other (see, for example, Patent Document 1 and Patent Document 2).

  According to such a lining construction method, since the material of the profile is not limited, there is an advantage that it is possible to use a synthetic resin, in particular, a hard vinyl chloride resin suitable for lining pipe construction in terms of cost, moldability, strength and the like. is there.

  By the way, in the pipe making machine 301 used in the existing pipe lining construction method, for example, as shown in FIG. 10, the fitting roller 330 for fitting the fitting portion (male / female fitting) of the profile 100 is the outer roller 331. When the lining pipe (rehabilitated pipe) is made by this pipe making machine 301, the outer roller 331 moves around the lining pipe, so that the outer roller 331 moves. It is necessary to make pipes with the necessary clearance.

  For this reason, when the profile is wound with no clearance between the inner surface of the existing pipe and the outer surface of the lining pipe, it is necessary to make the pipe while providing the lining pipe with a recess 400 through which the outer roller 331 can pass. In order to form such a recess 400, it is necessary to locally bend the profile. However, if the profile is highly rigid, it is difficult to perform such local bending, and pipe manufacturing is difficult. There is a case.

  On the other hand, as a method of constructing the rehabilitation member without clearance on the existing pipe inner surface, a strip of hard vinyl chloride (strip) is spirally wound around the inner surface of the existing pipe, There is a construction method (hereinafter referred to as construction method A) in which a spiral pipe is formed on the inner surface of an existing pipe by fitting adjacent members together using a fitting member (joiner).

In addition, when a strip having connecting portions formed on both side edges is spirally wound and adjacent side edges are connected to each other to form a pipe, the strip is sent to the outside of the pipe being formed. There is a construction method (hereinafter referred to as construction method B) in which adjacent side edges of the strip are mutually coupled using the force acting on the fed strip and the tension of the pipe being formed (for example, construction method B). (See Patent Document 3).
JP-A-10-315328 Japanese Patent Laid-Open No. 11-254531 JP 2002-525526 A

  By the way, in the above construction method A, it is a construction method in which a band plate is simply pressed and pasted to the inner surface of an existing pipe. Therefore, when there is no existing pipe or when the unevenness of the existing pipe is severe, reaction force cannot be obtained from the outside. Cannot make pipes.

  On the other hand, Method B is a method in which the strips are fed to the outside of the pipe being formed and the adjacent side edges of the strips are connected to each other. Since this is a method of rotating the machine, there is a possibility of buckling deformation due to insufficient strength of the strip, particularly when a pipe having a large diameter and a large weight is formed.

  The present invention was made in view of such circumstances, and in the construction method for producing a lining pipe by spirally winding a profile in an existing pipe, in producing a pipe with no clearance on the existing pipe inner surface, Providing a lining construction method for an existing pipe that does not require local bending of the profile, and can stably produce a lining pipe even if it is an existing pipe having a large diameter, and An object is to provide a pipe making machine suitable for realizing a simple construction method.

  In the construction method of the present invention, in an existing pipe, a long profile in which fitting portions are formed on both side edges is spirally wound, and fitting portions adjacent to each other are fitted together to form a lining pipe A lining construction method for an existing pipe to form a profile, in which a newly wound profile is supplied from the inside to a profile that has already been wound, and the supply direction is reversed to the newly wound profile. By pressing this new profile against the wound profile from the inside while exerting a direction force, it is possible to fit the fitting portion of the new profile to the fitting portion of the wound profile. It is a feature.

  According to the construction method of the present invention, since a force (back tension) opposite to the supply direction is applied to the profile supplied toward the already wound profile, the profile is already wound. The profile (the lining pipe being formed) can always be kept in a squeezed state, and for profile fitting, even if the already wound profile is pushed from the inside, it will not escape to the outside. That is, by applying the back tension to the profile to be newly supplied, the already wound profile itself plays the role of the outer roller, so that the outer roller becomes unnecessary. Even when the reaction force cannot be obtained from the outside or when the unevenness of the existing pipe inner surface is severe, the lining pipe can be stably produced regardless of such a situation.

In the pipe making machine of the present invention, a long profile in which fitting portions are formed on both side edge portions is spirally wound in an existing pipe, and the fitting portions adjacent to each other are fitted to each other for lining. A pipe making machine used to form a pipe, which is a ring mechanism having a plurality of link bodies connected to each other, and is rotatably supported by the link body of the link mechanism and already wound. A plurality of link rollers that are in contact with the inner surface of the profile being profiled, and the inside of the fitting region that fits the already wound profile and the newly wound profile fitting portions together. An inner roller installed in the link mechanism, a rotation drive mechanism that applies rotation in the same direction to the plurality of link rollers and the inner roller, and a new profile is supplied from the inside toward the fitting region. A supply roller, and the supply roller applies a force in the direction opposite to the supply direction to the new profile supplied toward the wound profile. It is characterized in that it is configured to fit the fitting portion of the new profile to the fitting portion of the already wound profile by pressing against the wound profile from the inside.

  According to the pipe making machine of the present invention having the above-described structure, the construction method having the above-described characteristics can be realized, so that the lining pipe can be piped without providing an outer roller. Therefore, by applying the pipe making machine of the present invention to the rehabilitation of the existing pipe, the lining pipe (rehabilitation pipe) can be piped in the existing pipe without any clearance without locally bending the profile. In addition, since all of the inner roller and link roller rotate in the same direction, it is possible to apply a stable driving force to the entire pipe making machine, and load is concentrated on the profile that is newly supplied and wound. Can be suppressed.

  According to the construction method of the present invention, when a lining pipe is constructed in an existing pipe, a force (back tension) opposite to the supply direction is applied to a new profile that is supplied toward a profile that has already been wound. Since it is acting, the already wound profile (lining tube being formed) can always be kept in a state of being squeezed. This eliminates the need for an outer roller and eliminates the need to provide a recess for passage of the outer roller in the lining pipe even when the lining pipe is manufactured without clearance on the inner surface of the existing pipe. Pipe making using a profile is possible.

  According to the pipe making apparatus of the present invention, for the profile that has already been wound, a supply roller that supplies a new profile every time from the inside is provided, and the profile that is supplied toward the inner roller by the supply roller Since a force opposite to the supply direction is applied, a construction method having the above-described characteristics can be easily realized. In addition, since all of the inner roller and link roller rotate in the same direction, it is possible to apply a stable driving force to the entire pipe making machine, and a load is intensively applied to the newly supplied profile. As a result, it is possible to produce pipes without problems even when forming a lining pipe having a large diameter and a large weight.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, a profile and a pipe making machine used in the present invention will be described.

-Profile-
FIG. 1 shows an example of a profile forming a lining pipe.

  A profile 100 shown in FIG. 1 is a band-shaped member formed of a synthetic resin (eg, hard vinyl chloride, polyethylene, polypropylene, etc.) in a long band shape, and a plurality of ribs 103.. 103 are formed along the longitudinal direction. Yes. Further, on both side edge portions of the profile 100, a fitting convex portion 101 and a fitting concave portion 102 are formed along the longitudinal direction so as to overlap each other and engage with each other.

  The profile 100 having such a structure is spirally wound by a pipe making machine 1 and the like which will be described later, and in the winding process, as shown in FIGS. 2 (A) and 2 (B), 2 adjacent to each other. By fitting the fitting projection 101 of the other profile 100 into the fitting recess 102 of one profile 100 from the inside (the inside of the profile 100 that has already been wound), Profiles 100, 100 adjacent to each other can be connected to each other.

  FIG. 3 shows another example of a profile forming a lining pipe.

  A profile 110 shown in FIG. 3 is a belt-shaped member formed of a synthetic resin (eg, hard vinyl chloride, polyethylene, polypropylene, etc.) in a long band shape, and a plurality of ribs 113.. 113 are formed along the longitudinal direction. Yes. The profile 110 in this example is connected using a long strip connector 120.

  A fitting recess 112 is formed in each side edge of the profile 110 along the longitudinal direction. Further, the connector 120 is formed with two fitting convex portions 121 that can be fitted in the fitting concave portion 112 of the profile 110 in parallel with each other along the longitudinal direction.

  The profile 110 having such a structure is obtained by a pipe making machine 1 or the like to be described later in a state in which one of the fitting convex portions 121 of the connector 120 is fitted into one of the fitting concave portions 112 and 112 on both side edges. In the winding process, as shown in FIGS. 4A and 4B, in the two profiles 110 and 110 adjacent to each other, in the fitting recess 112 of one profile 100, By fitting the fitting convex portion 121 of the connector 120 fitted into the fitting concave portion 112 of the other profile 110 from the inside (the inside of the profile 110 that has already been wound), the profiles 110 and 110 that are adjacent to each other. Can be connected to each other.

−Pipe making machine−
FIG. 5 is a side view showing an example of the pipe making machine of the present invention.

  The pipe making machine 1 in this example is a self-propelled pipe making machine used for construction of a lining pipe having a circular cross section, and includes a forming frame 2, a fitting mechanism portion 3 installed in the forming frame 2, and a supply roller 4. It has.

  As shown in FIGS. 5 and 6, the molded frame 2 includes an annular structure link mechanism (flexible) 20 formed by connecting a plurality of link bodies 21... 21, and each link of the link mechanism 20. It is comprised by the link rollers 22 and 22 supported by the body 21 rotatably. The circumferential length of the forming frame 2 can be adjusted by changing the number of links between the link body 21 and the link rollers 22... 22 and can be adjusted to the pipe size of the lining pipe for pipe making.

  The fitting mechanism unit 3 includes an inner roller (fitting roller) 31 disposed inside a lining pipe that performs pipe making, a hydraulic motor 32 that rotationally drives the inner roller 31, and the like.

  As shown in FIG. 7, sprockets 5, 5 are connected to the rotary shaft 31 a of the inner roller 31 and the rotary shafts 22 a of the link rollers 22, 22, respectively. An annular chain 6 is wound around these sprockets 5.. 5, and all of the link rollers 22, 22 are rotated in addition to the rotation of the inner roller 31 by driving of the hydraulic motor 32 of the fitting mechanism 3. It is configured to rotate in the same direction as the inner roller 31. Due to the rotation of the inner roller 31 and the link rollers 22... 22, the entire pipe making machine 1 moves around the existing pipe 200 and advances while spirally winding the profile 100. By pressing the fitting convex portion 101 of the profile 100 to be newly supplied from the inside by the inner roller 31 into the fitting concave portion 102 of the rotated profile 100, the fitting convex portion 101 of the new profile 100 is pressed. It can be fitted into the fitting recess 102 of the profile 100 that has already been wound.

  The sprockets 5 and 5 and the chain 6 are preferably provided on the side opposite to the supply roller 4 in consideration of interference with the profile 100 supplied toward the inner roller 31.

  The hydraulic motor 32 that rotates the inner roller 31 described above is driven by hydraulic oil supplied from the hydraulic unit 7 (see FIG. 8). Further, the hydraulic unit 7 is driven by a power source supplied from a generator 8 (see FIG. 8). It is preferable that the hose, the generator 8 and the cord of the hydraulic unit 7 are connected by a flexible joint or the like so as not to be affected by the rotation of the pipe making machine 1. Further, since the profile 100 is supplied into the existing pipe 200, it is preferable that the cords and hoses are supplied from the direction opposite to the profile 100 (for example, upstream of the existing pipe 200 as shown in FIG. 8).

  In the pipe making machine 1 of this example, the supply roller 4 that supplies the profile 100 to the fitting mechanism unit 3 is disposed on the inner side of the molding frame 2 on the upstream side in the rotation direction of the fitting mechanism unit 3. Yes. The supply roller 4 is composed of a pair of pinch rollers (with brakes) 41 and 42 that sandwich the profile 100 supplied toward the inner roller 31 (fitting region) of the fitting mechanism unit 3 from both the inner surface and the outer surface thereof. The profile 100 supplied toward the inner roller 31 of the fitting mechanism section 3 can be subjected to a force (back tension) opposite to the supply direction by the braking force of the pinch rollers 41 and 42. it can. Therefore, by providing such a supply roller 4, it is possible to keep the already wound profile 100 (the lining pipe being formed) in a state where it is always squeezed.

  The supply roller 4 having the above structure is held on the molding frame 2 (link body 21) via the support plate 40, and the positional relationship of the fitting mechanism portion 3 with respect to the inner roller 31 is kept constant. Rotate. The supply roller 4 only needs to have a structure that applies a force in the direction opposite to the supply direction to the profile 100 supplied toward the inner roller 31, and the pinch rollers 41 and 42 are rotated by friction braking. In addition to a structure that regulates the above, a structure in which the pinch rollers 41 and 42 are rotated in the direction opposite to the supply direction of the profile 100 by an actuator such as a hydraulic motor may be used.

  Next, a specific example of a lining pipe construction method will be described with reference to FIGS.

-Preparation before construction-
First, the existing pipe 200 is provided with a manhole for every predetermined span. In this example, the lining pipe is formed in the existing pipe 200 by using the upstream manhole 201 and the downstream manhole 202 in the construction target area (rehabilitation area). Is manufactured. Construction of the lining pipe is performed from the upstream side to the downstream side of the existing pipe 200.

  For the production of the lining pipe, a profile drum 130 (with a turntable), a pipe making machine 1, a hydraulic unit 7, a generator 8 and the like wound with the profile 100 having the structure shown in FIG. 1 are used. Among these, the profile drum 130 is installed on the ground on the upstream manhole 201 side, and the generator 8 is installed on the ground on the downstream manhole 202 side. Further, the pipe making machine 1 and the hydraulic unit 7 are carried in and installed through the upstream manhole 201 at the upstream end in the existing pipe 200 to be rehabilitated. In addition, about the pipe making machine 1, the circumference (the number of the link bodies 21 and the link rollers 22) of the shaping | molding flame | frame 2 is adjusted according to the pipe | tube size of the lining pipe | tube which manufactures a pipe.

−Preparation and setting of starting lining tube−
After the profile 100 is pulled out from the profile drum 130 disposed on the ground and pulled into the upstream manhole 201, the leading end portion of the profile 100 is passed between the pair of pinch rollers 41 and 42 of the supply roller 4 of the pipe making machine 1. In the state where the tip portion of the profile 100 is sandwiched between the inner roller 31 of the fitting mechanism unit 3 and the inner surface of the existing pipe 200, the entire pipe making machine 1 is manually rotated several times (three times). About) Winding to produce the starting lining tube 10. The produced starting lining pipe 10 is fixed to the upstream end of the existing pipe 200, or a weight or the like of an appropriate weight is installed at the pipe end so that the starting lining pipe 10 is rotated or displaced. Make sure that the above does not occur.

-Lined pipe making by pipe making machine-
After the preparation and setting of the starting lining pipe is completed, the fitting mechanism portion 3 of the pipe making machine 1 is driven (driving the hydraulic motor 32). By driving the fitting mechanism 3, the inner roller 31 and the plurality of link rollers 22, 22 of the fitting mechanism 3 rotate and move along the inner peripheral surface of the starting lining pipe 10. As the whole revolves, a new profile 100 is supplied from the supply roller 4 toward the inner roller 31 of the fitting mechanism portion 3, and the fitting convex portion 101 of the supplied new profile 100 is started by the inner roller 31. The fitting convex portion 101 of the new profile 100 is fitted into the fitting concave portion 102 of the starting lining tube 10 by being pressed against the fitting concave portion 102 of the lining tube 10 (see FIG. 2B). Further, when the inner roller 31 rotates about one turn on the inner circumference of the starting lining pipe 10 due to the revolution of the pipe making machine 1, it is newly supplied to the fitting recess 102 of the previously wound profile 100. The fitting convex portion 101 of the profile 100 is fitted by the inner roller 31, and the lining pipe 11 is sequentially produced.

  In such a pipe making process, the profile 100 supplied toward the inner roller 31 of the fitting mechanism portion 3 is opposite to the supply direction by the braking force of the pinch rollers 41 and 42 constituting the supply roller 4. Since the force (back tension) is applied, the already wound profile 100 (the lining pipe being formed) can be kept in a state of being always squeezed, and thus, for the new fitting of the profile 100 In addition, even if the already wound profile 100 is pushed from the inside, it will not escape to the outside. That is, by applying a back tension to the profile 100 newly supplied by the supply roller 4, the already wound profile itself can serve as an outer roller 331 as shown in FIG.

  Thus, in this example, even if the pipe making machine 1 is not provided with an outer roller, the lining pipe 11 can be smoothly produced in a stable state from the beginning of pipe making to the end of pipe making. The lining pipe 11 can be formed on the inner surface of the existing pipe 200 without a clearance. Moreover, since it is not necessary to provide the recessed part etc. for making an outer roller pass in the lining pipe | tube 11 in formation, even if the profile 100 is highly rigid, pipe manufacture of a lining pipe | tube is attained. Furthermore, even when the reaction force cannot be obtained from the outside or when the unevenness of the inner surface of the existing pipe 200 is severe, the lining pipe can be stably produced regardless of such a situation.

  In addition, all of the link rollers 22... 22 are rotated in the same direction as the inner roller 31 by a rotational drive mechanism constituted by the hydraulic motor 32, the sprocket 5, the chain 6, etc. Therefore, even if a lining pipe having a large diameter and a large weight is formed, the pipe making can be performed without any problem. It can be performed.

In the above pipe making process, the profile 100 supplied into the existing pipe 200 becomes twisted as the number of turns of the fitting mechanism portion 3 of the pipe making machine 1 increases. By rotating the drum 130 (with a turntable) continuously or intermittently, the twist of the profile 100 can be eliminated.
-Completion of pipe making and removal of pipe making equipment-
After the production of the lining pipe 11 is completed over the entire length of the existing pipe 200, the profile 100 at the pipe end of the lining pipe 11 is cut, and then the equipment such as the pipe making machine 1 and the hydraulic unit is removed.

-About backfilling materials-
In the above lining construction method, a backfilling material such as mortar is injected into the gap between the outer peripheral surface of the lining pipe 11 (the outer peripheral face of the profile 100) and the existing pipe 200 (including the gap between the ribs 103 of the profile 100). Or may not be injected. When injecting the backfilling material, for example, a method of applying mortar to the surface of the profile 100 just before fitting may be employed.

  Here, in the above example, the lining pipe 11 is manufactured in the existing pipe 200 using the profile 100 having the structure shown in FIGS. 1 and 2. Instead, the lining pipe 11 is shown in FIGS. 3 and 4. A lining pipe may be formed in the existing pipe 200 using the structural profile 110. Moreover, it is not restricted to the profile shown in FIGS. 1-4, It can be fitted to the fitting part of the profile already wound only by pressing the fitting part of the profile supplied newly from the inside. If possible, the lining pipe may be manufactured using a profile of another structure.

  INDUSTRIAL APPLICATION When existing pipes, such as an agricultural water pipe, a sewer pipe, a water supply, or a gas pipe, are aged by cracking, corrosion, etc., they can be effectively used to rehabilitate the aged existing pipe. .

It is sectional drawing which shows an example of the profile used for the lining construction method of this invention. It is sectional drawing which similarly shows an example of a profile. It is sectional drawing which shows the other example of the profile used for the lining construction method of this invention. It is sectional drawing which similarly shows the other example of a profile. It is a front view which shows an example of the pipe making machine of this invention. It is a perspective view which shows the pipe making machine of FIG. 5 in use condition. It is a figure which shows the connection structure of an inner roller and a link roller. It is a figure which shows an example of the lining construction method of this invention. It is a figure which shows an example of the lining construction method of this invention. It is a figure which shows an example of the conventional lining construction method and a pipe making machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe making machine 2 Forming frame 20 Link mechanism 21 Link body 22 Link roller 3 Fitting mechanism part 31 Inner roller 32 Hydraulic motor 4 Supply roller 41, 42 Pinch roller 40 Support plate 5 Sprocket 6 Chain 7 Hydraulic unit 8 Generator 10 Start Lining pipe 11 lining pipe 100 profile 101 fitting convex part 102 fitting concave part 200 existing pipe 201,202 manhole

Claims (2)

Lining existing pipes that form a lining pipe by spirally winding a long profile with fitting parts formed on both side edges in the existing pipe and fitting the adjacent fitting parts to each other. A construction method,
A new winding profile is supplied from the inside to the profile that has already been wound, and this new profile is applied while applying a force in the direction opposite to the supply direction to the newly wound profile. A lining construction method for an existing pipe, wherein a fitting portion of a new profile is fitted to a fitting portion of a profile that has already been wound by pressing the wound profile from the inside. In an existing pipe, it is used to form a lining pipe by spirally winding a long profile with fitting parts formed on both side edges and fitting the adjacent fitting parts to each other. A pipe making machine,
A link mechanism having an annular structure in which a plurality of link bodies are connected to each other; a plurality of link rollers that are rotatably supported by the link body of the link mechanism and are in contact with the inner surface of the already wound profile; An inner roller installed in the link mechanism, and the plurality of link rollers so as to be located inside a fitting region in which fitting portions of a profile already wound and a newly wound profile are fitted to each other. And a rotation drive mechanism that applies rotation in the same direction to the inner roller, and a supply roller that supplies a new profile from the inside toward the fitting region,
The new profile supplied by the supply roller toward the already wound profile is applied to the new profile while the force opposite to the supply direction is applied to the new profile. The pipe making machine is configured to fit the fitting portion of the new profile to the fitting portion of the already wound profile by pressing against the inside from the inside.

Images