KR101057865B1 - Pipe mill used for lining construction method of existing pipe and the construction method - Google Patents

Abstract

An object of the present invention is to make it possible to stably line a lining tube at all times irrespective of the change in the curvature (winding marks) of the profile supplied from the profile drum.

In the existing pipe 200, the long profile 100 with the joints formed at both edges is wound in a spiral shape, and the curvature of the profile 100 is formed by forming the lining pipe by joining adjacent joints with each other. The preliminary molding of the profile 100 is performed so that it may become constant. More specifically, the preforming part 4 (three-point bending mechanism) which consists of several shaping | molding rollers 41-43 is provided in front of the joining mechanism part 3 of the canning machine 1, and the joining mechanism part 3 is provided. The curvature of the profile 100 to be supplied to is always constant.

Tuber, existing pipe, lining pipe, profile, profile drum, preform

Description

METHOD FOR CONSTRUCTING PIPE LINING FOR EXISTING PIPES, AND A PIPE-MANUFACTURING MACHINE USED THEREIN}

BRIEF DESCRIPTION OF THE DRAWINGS Sectional drawing of the profile used for the lining construction method of this invention.

Figure 2 is a side view showing an example of the canister of the present invention.

FIG. 3 is a cross-sectional view showing the main part structure of the joining mechanism part of the canister of FIG. 2; FIG.

4 is a view showing an example of a preformed part used in the tube making machine of the present invention.

Fig. 5 is a plan view showing an example of a preformed part used in the tube making machine of the present invention.

6 is a diagram schematically showing an example of a lining construction method of the present invention.

7 is a diagram schematically showing an example of a lining construction method of the present invention.

8 is a diagram schematically showing another example of the preform.

9 is a diagram schematically showing still another example of the preform.

10 is a diagram schematically showing still another example of the preform.

11 is a diagram schematically showing still another example of the preform.

Description of the Related Art

1: canning machine

2: forming frame                 

20: link mechanism

21: Link body

22: guide roller

3: joining mechanism part

31: outer roller

311: flange

32: inner roller

33: hydraulic motor

4: preform

41 to 43: forming roller

44: support plate

5: hydraulic unit

6: generator

7: press type

8: bending type

10: start lining pipe

100: profile

101: convex convex portion

102: joint recess

103: rib                 

104: sealing material

105: reinforcing member

110: profile drum

200: existing hall

201, 202: manhole

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

In existing pipes such as agricultural water pipes, sewer pipes, water pipes, gas pipes, etc., a method for regenerating existing pipes by lining the inner circumferential surface of the existing pipes with synthetic resin, etc. It is adopted.

As a method of constructing a lining pipe on the inner surface of an existing pipe such as a sewer pipe, there is a method of spirally forming a long profile having a joint at both edges thereof.

For example, a drum on which a profile is wound is installed on the ground, and the profile is continuously supplied from the drum to a self-propelled tube making machine disposed in the existing pipe, and the profile is wound in a spiral shape in the existing pipe, and at the same time, the bands are adjacent to each other. A method of forming a lining tube by joining side edge portions (joint portions) of members to each other has been proposed (see, for example, Japanese Patent Application Laid-Open No. 11-254531).

According to such a lining construction method, since the material of a profile is not limited, there exists an advantage that a hard vinyl chloride resin suitable for lining pipe construction can be used from a synthetic resin, especially cost, formability, strength, etc. Moreover, as a profile, what combined the metal reinforcement member in the rib part is used in many cases, and in this case, it supplies to the piping machine of a lining pipe in the state which integrated the reinforcement member in the profile and integrated.

By the way, the profile used for lining of an existing pipe | tube is often preserve | saved for a long time in the state wound by the drum, and the wound wound on the profile itself arises. Moreover, since the part is wound by a small diameter in the part near a drum center, and it is wound by a large diameter in the outer peripheral part, the curvature of the wound wound of a profile differs in the profile on the drum center side, and the profile on the drum outer side. Since the drum winding profile is drawn out sequentially from the center of the drum, a profile wound at a small diameter is drawn out at the beginning of the tube making, and a profile wound outside the drum is drawn out as the tube making proceeds. For this reason, the curvature of the wound wound of a profile changes in a manufacturing process, and the diameter of the wound wound of the profile supplied to a piping machine becomes large.

On the other hand, when a lining pipe of circular cross section is installed in an existing pipe, since the lining pipe is usually made to be of a constant size (diameter) regardless of the progress of the canning, the joints of the profiles adjacent to each other in the joint mechanism part of the pipe making machine When the curvature of the profile supplied to the joining mechanism part changes, when joining mutually, the entrance angle of the profile to the joining mechanism part of a pipe making machine changes, and the two profile joining parts which perform joining, ie, the joining part of the profile previously produced and The relative positional relationship with the junction of the supplied profile gradually changes.

In the case where there is an extreme difference between the drum inner diameter and the drum outer diameter, the tube making is not stabilized and the tube making state changes at the beginning of the tube making and at the end of the tube making. . Moreover, when a positional deviation arises in the joining part of the profile in which the piping is completed, and the joining part of the profile supplied newly in a joining mechanism part, the joining part of either or both profiles may be damaged.

In particular, in the case where a profile in which a reinforcing member such as a metal is fitted is wound on a drum for a long time, the wound of the profile becomes rigid (high rigidity) due to plastic deformation of the reinforcing member, and the above problems become remarkable.

Moreover, when forming the lining pipe of a large diameter using the profile wound on the small diameter drum, or when forming the lining pipe of the small diameter using the profile wound on the large diameter drum, Problems such as poor joining of the profile and breakage of the joint may occur.

The present invention has been made in view of such a situation, and in lining a profile by spirally winding a profile in an existing pipe, the lining pipe may be used regardless of the change in the curvature of the profile supplied from the drum. It is an object of the present invention to provide a lining construction method for an existing pipe which can be stably produced at all times, and to provide a tubing machine suitable for realizing such a construction method.

According to the construction method of the present invention, lining construction of an existing tube forming a lining tube by winding a long profile of a long section in which a joint is formed at both edges in a spiral tube, and joining adjacent joints with each other. The method is characterized by preforming the profile so that the curvature of the profile becomes constant when the profile is wound and joined.

According to the construction method of the present invention, when constructing a cross-section circular lining pipe in an existing pipe, the profile is always curvature-molded (preformed) at a constant radius regardless of the change in the curvature (winding marks) of the profile supplied from the drum. Since it can be rolled-joined in one state, it can manufacture the lining pipe in a stable state all the time from the beginning of production to completion of the production regardless of the progress of production. Also, in the case of forming a large diameter lining tube using a profile wound on a small diameter drum, or in the case of forming a small diameter lining tube using a profile wound on a large diameter drum, the profile has a curvature suitable for the production of the lining tube. Since it becomes possible to preform, a lining pipe can be manufactured favorably.

In the construction method of this invention, it is preferable that the profile curvature after preforming is a curvature close to the diameter (complete diameter) of the lining pipe which performs a construction. In addition, in consideration of the property that the profile tends to return to its original state after curvature molding due to the spring effect of the profile, the preforming of the profile is performed so that the curvature is slightly smaller than the completion diameter of the lining pipe installed in the existing pipe. It is preferable to carry out.

The tube making machine of the present invention is a tube making machine which is used to form a lining tube by winding a long profile in which a joint is formed at both edges thereof in an existing pipe in a spiral manner, and joining adjacent joints to each other. It is characterized by including the preform part which preforms a profile so that the curvature of the profile supplied to a joining mechanism part may be fixed.

As a specific structure of the preform part used for the piping machine of this invention, the three-point bending mechanism which combined several roller is mentioned.

According to the production machine of the present invention, in constructing a circular cross-sectional lining pipe in an existing pipe, the profile is always curvature-molded (preformed) to a constant radius regardless of the change in the curvature (winding marks) of the profile supplied from the drum. Since it can supply to a joining mechanism part in a state, irrespective of the progress of a canning, a lining pipe can be smoothly manufactured in a stable state from the beginning of a canning to the end of a canning. Also, when forming a large diameter lining tube using a profile wound on a small diameter drum, or when forming a small diameter lining tube using a profile wound on a large diameter drum, the profile has a curvature suitable for the production of the lining tube. Since it can be preformed, a lining pipe can be manufactured favorably.

In the tube manufacturing machine of this invention, it is preferable that the curvature of the profile which preforms in a preform part is set to the curvature near the diameter (finish diameter) of the lining pipe which carries out construction. In addition, due to the spring effect of the profile, the profile is preliminarily formed so that the curvature is slightly smaller than the finished diameter of the lining pipe to be constructed in the existing pipe, considering that the profile tends to return to its original state after curvature molding. It is preferable to carry out.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.

First, the profile and the tube making machine used for this invention are demonstrated.

〔profile〕

1 is a cross-sectional view showing the structure of a profile forming a lining pipe.

The profile 100 shown in FIG. 1 is a strip-shaped member formed of a synthetic resin (for example, hard vinyl chloride, polyethylene, polypropylene, and the like) into a long strip shape, and a plurality of ribs 103 · 103 are long. It is formed along the direction. Moreover, the joint convex part 101 and the joint concave part 102 which engage each other and overlap each other in and out in the edge part of the profile 100 are formed along the longitudinal direction, and the vicinity of the joint convex part 101 is carried out. The sealing member 104 is provided in order to ensure water resistance. The sealing material 104 is formed by simultaneously pushing a soft elastic body such as an elastomer and the profile 100. In addition, the sealing material 104 may be formed by applying a hot melt adhesive or a solvent adhesive.

The profile 100 having such a structure is wound around the profile drum 110 (see FIG. 6) with the reinforcing member 105 sandwiched between the two ribs 103 and 103, and in this state, Supplied. In addition, the cross-sectional shape of the reinforcing member 105 is preferably a cross-sectional shape that easily obtains the strength in the cross-sectional direction when the profile 100 is wound, for example, a W-shape as shown in FIG. It is not limited, For example, it may be V-shaped or U-shaped. In addition, the material of the reinforcing member 105 is preferably a metal material (for example, steel), but may be a synthetic resin having high rigidity.

[Canister]

Fig. 2 is a side view showing an example of the canister of the present invention.

The tube making machine 1 of this example is a self-propelled tube making machine used for the construction of the lining pipe of a circular cross section, and is provided with the shaping | molding frame 2 and the joining mechanism part 3 provided in this shaping | molding frame 2. As shown in FIG.

As shown in FIG. 2 and FIG. 5, the forming frame 2 has a link mechanism (curve material) 20 having an annular structure formed by connecting a plurality of link bodies 21. It is comprised by the guide rollers 22 * 22 which rotation is supported by each link body 21 of the link mechanism 20 freely. The circumferential length of the shaping | molding frame 2 can be adjusted by changing the connection number of the link body 21 and the guide roller 22, and can be matched with the pipe size of the lining pipe which carries out piping.

The bonding mechanism part 3 is a hydraulic motor which drives the outer surface roller 31 and the inner surface roller 32, and those outer surface roller 31 and the inner surface roller 32 for fitting the profile 100 from both an outer surface and an inner surface. (33) and the like.

As shown in FIG. 3, the outer roller 31 is a pin-shaped roller provided with a plurality of flanges 311... 311 to be fitted between the ribs 103 of the profile 100 on an outer circumferential surface thereof. 32 is a roller whose outer peripheral surface is flat. Moreover, it is preferable to coat the outer peripheral surface of the inner surface roller 32 with rubber | gum with a large frictional resistance, etc.

The outer roller 31 and the inner roller 32 are connected via a gear (not shown), and the inner roller 32 and the outer roller 31 are driven by rotating the inner roller 32 by the hydraulic motor 33. ) Rotates in opposite directions to each other. By the rotation of these outer surface rollers 31 and the inner surface rollers 32, the whole canister 1 moves around in the existing pipe 200, and progresses while winding the profile 100 spirally, In the process of advancing, the joining convex part 101 and joining concave part 102 of the profile 100 which adjoin each other can mutually join.

In addition, the hydraulic motor 33 for rotating the inner surface roller 32 is driven by the hydraulic oil supplied from the hydraulic unit 5 (see FIG. 6). In addition, the hydraulic unit 5 is driven by the power supplied from the generator 6 (see FIG. 6). It is preferable that the hoses, the generators 6, and the cords of these hydraulic motors 5 are connected by a flexible joint or the like so as not to be influenced by the rotation of the steel tube 1. In addition, since the profile 100 is supplied in the existing pipe 200, cord hoses are reversed from the profile 100 (for example, upstream of the existing pipe 200 as shown in FIG. 6). It is preferable to supply.

In the existing pipe 1 of this example, there is a feature in that a preformed part (preformed part) 4 is provided for making the curvature of the profile supplied to the joining mechanism part 3 constant.

As shown in FIG. 4 and FIG. 5, the preform part 4 is a three-point bending mechanism comprised by the three rollers of the center shaping roller 41 and the front and back shaping rollers 42 and 43, and The support shaft 411 of the center shaping roller 41 is supported by the support shaft 211 of the guide roller 22 of the shaping frame 2. In addition, the front and rear two forming rollers 42 and 43 are supported by the support shaft 411 of the center forming roller 41 via the support plate 44, respectively.

The positional relationship between these center shaping rollers 41 and the front and rear shaping rollers 42 and 43 may have passed through the profile 100 between the front and rear shaping rollers 42 and 43 and the center shaping roller 41. At this time, the profile 100 is arranged to impart a bending deformation (moving bending) of a certain curvature. Therefore, the curvature (winding marks) of the profile 100 supplied from the profile drum 110 (refer FIG. 6) by providing the preform part 4 of such a structure in the front end of the joining mechanism part 3 is provided. Irrespective of the change of), the profile 100 can be supplied to the joining mechanism part 3 in a state of curvature molding (preforming) at a constant radius at all times.

In addition, the preform part 4 is provided to the distance between the center shaping roller 41 and the front and back shaping rollers 42 and 43 and the center shaping roller 41 by the change of the support plate 44, etc. The curvature of the bending applied to the profile 100 can be arbitrarily set by adjusting the angle θ of the forming rollers 42 and 43 before and after.

In addition, in this example, the lining which performs piping manufacturing in consideration of the spring effect of the reinforcement member 105 inserted in the profile 100 in consideration of the property that the profile 100 tries to return to an original state after curvature shaping | molding. The positional relationship between the center shaping roller 41 and the front and back shaping rollers 42 and 43 is adjusted so as to be preformed with a curvature slightly smaller than the completed diameter of the tube.                     

Next, the specific example of the construction method of a lining pipe is demonstrated, referring FIG. 6 and FIG.

[Preparation before construction]

First, the manhole is installed in the existing pipe 200 for each predetermined span, and in this example, the manhole 201 and the downstream manhole 202 of the construction target area (rehabilitation area) are used in the existing pipe 200. Produce lining pipe. The construction of the lining pipe is performed from the upstream side of the existing pipe 200 toward the downstream side.

In the piping of the lining pipe, a heavy-duty profile drum 110 (with a swivel) wound around the profile 100 shown in FIG. 1, a pipe mill 1, a hydraulic unit 5, a generator 6, and the like, are mounted. use. Among these, the profile drum 110 is provided in the ground part by the upstream manhole 210 side, and the generator 6 is installed in the ground part by the downstream manhole 202 side. In addition, the piping machine 1 and the hydraulic unit 5 are carried in and installed in the upstream end part in the existing pipe 200 used as a rehabilitation object through the upstream manhole 201. In addition, about the canning machine 1, the circumferential length (the number of the link bodies 21 and the guide rollers 22) of the shaping | molding frame 2 is adjusted according to the pipe size of the lining pipe | tube which carries out piping.

[Production, set of opening lining pipe]

The profile 100 is taken out from the profile drum 110 placed on the ground and drawn into the upstream manhole 201, and the front end portion of the profile 100 is rolled on the outer surface of the joining mechanism 3 of the tube making machine 1. In the state sandwiched between 31 and the inner surface roller 32, the joining mechanism part 3 is rotated manually, and the profile 100 is wound several times (about 3 times), and the opening lining pipe 10 for a start is produced. do. The produced starting lining pipe 10 is fixed to an upstream end of the existing pipe 200, or by installing a weight or the like of a suitable weight at the end of the pipe, such that rotation or positional deviation of the starting lining pipe 10 is reduced. Do not create it.

[Making of lining pipe by canning machine]

After the production and set of the above-described starting lining pipe are completed, the joining mechanism part 3 of the canning machine 1 is driven (drive of the hydraulic motor 33). By the driving of this joining mechanism part 3, the joining convex which the lining pipe | tube 10 for starting is lined up side by side by the clamping force of the outer surface roller 31 and the inner surface roller 32, and the newly supplied profile 100 contacts each other. It joins to the starting lining pipe 10 by joining the part 101 and the joining recessed part 102. FIG. At the same time, the whole pipe making machine 1 revolves in the circumferential direction of the existing pipe 200, and moves forward in the direction of the pipe axis of the existing pipe 200, and moves with the movement of the canning machine 1. The profile 100 is wound in a spiral shape, the new profile 100 is sequentially joined, and the lining pipe 11 is constructed.

In such a manufacturing process, since the profile 100 wound on the profile drum 110 is taken out from the center of the profile drum 110 in sequence, the profile 100 wound with a small diameter is drawn out at the beginning of the tubing, As the tubing proceeds, the profile 100 wound around the drum is drawn out. For this reason, the curvature of the wound mark of the profile 100 changes in a manufacturing process, and the diameter of the wound mark of the profile 100 supplied toward the piping machine 1 becomes large, but in this example, the piping machine 1 Since the preformed part 4 is provided in front of the joining mechanism part 3 of), the profile (regardless of the change in the curvature (wound) of the profile 100 supplied from the profile drum 110) 100 can always be supplied to the joining mechanism part 3 in the state which carried out curvature shaping | molding (preliminary shaping | molding) to a fixed radius. Therefore, the lining pipe 11 can be sequentially produced in a stable state from the beginning of production to the completion of production.

In addition, as the number of turns of the joining mechanism part 3 of the canning machine 1 increases in the above-mentioned canning process, the profile 100 supplied into the existing pipe 200 is in a twisted state, The twist of the profile 100 can be eliminated by rotating the installed profile drum 110 (with a rotating table) continuously or intermittently.

[Demolition of article making, article making equipment removal]

After the production of the lining pipe 11 is completed over the entire length of the existing pipe 200, the profile 100 of 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. To demolish.

(Backfill process)

A backfill material such as cement milk is injected into the gap between the outer circumferential surface of the lining pipe 11 (the outer circumferential surface of the profile 100) and the existing pipe 200 (including the gap between the rib 103 of the profile 100). . In addition, when there is a possibility that buckling breakage or the like may occur in the lining pipe 11 when the backfill material is injected, a support hole or the like is provided in the lining pipe 11 to be reinforced.

Here, in the above example, although the bonding mechanism part 3 is driven by hydraulic pressure, this invention is not limited to this, You may comprise so that a bonding mechanism part may be driven by a pneumatic motor or an electric motor. Moreover, you may make it drive the joining mechanism part by manual operation.

In the above example, although the three-point bending mechanism which consists of three shaping | molding rollers 41-43 is used as the preform part 4, it is not limited to this, For example, as shown in FIG. 4, two forming rollers 141, 142 are provided in front, and the two forming rollers 141, 142 and the restricting plate 130 (or outer roller 31) of the inlet of the joining mechanism part 3 are provided. You may comprise a 3-point bending mechanism by this.

Further, as another example, the upper and lower pairs of press dies 7 as shown in FIGS. 9A and 9B are arranged in front of the joining mechanism part 3 to supply the joining mechanism part 3 to the profile 100. A method of making the curvature constant by the continuous press molding, or the bending die 8 having the arc-shaped slit 81 as shown in FIG. 10 is disposed in front of the joining mechanism part 3, thereby joining the joining mechanism part 3. ) By passing through the slit 81 of the bending die 8 to a predetermined curvature (shaping).

In addition, in the case of using a high rigid synthetic resin (thermoplastic resin) as a profile reinforcing member or in forming a lining tube with a single profile (without reinforcing member), a heat-molding mold (heater built-in) as shown in FIG. The method of making the curvature of the profile 100 constant may be employ | adopted by arrange | positioning 9) in front of the joining mechanism part 3, and heat-forming (preforming) the profile 100 supplied to the joining mechanism part 3. . In this case, a method of arranging heating means such as a heater at the front end of the molding die, and sending the profile 100 to the molding die in a pre-heated state may also be considered.

According to the present invention, in lining an existing pipe into a profile having a circular cross section, regardless of a change in the curvature (wound) of the profile supplied from the drum, the profile is always curvature-molded (preformed) to a constant radius. Since it can be rolled-joined, the lining pipe can be produced in a stable state at all times from the beginning of the production to the completion of the production regardless of the progress of the production. Therefore, the present invention can be effectively used to regenerate an old existing pipe when an existing pipe such as an agricultural water pipe, a sewer pipe, a water supply or a gas pipe is aging due to cracking or corrosion.

Claims (5)

It is a lining construction method of the existing tube which forms a lining tube by spirally winding the long profile in which the junction part was formed in both edge part in a existing tube, and joining mutually adjacent junction parts mutually, and winding-joint the profile. A preliminary forming of the profile is carried out so that the curvature of the profile becomes constant at the time. The method for lining an existing pipe according to claim 1, wherein the profile is cured so that the curvature of the profile corresponds to the curvature of the diameter of the lining pipe to be constructed. In an existing pipe, it is a piping machine used to form a lining pipe by winding the long profile in which the junction part was formed in the both edge part spirally, and joining adjacent joint parts mutually, and supplying it to the joining mechanism part of the said piping machine. A preliminary forming section for preforming the profile so that the curvature of the profile is constant. The pipe manufacturing machine according to claim 3, wherein the preform is configured to preform the profile with a curvature corresponding to the diameter of the lining pipe to be constructed. The tube mill according to claim 3, wherein the preform part is a three-point bending mechanism combining a plurality of rollers.

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