JP7558840B2 - Repair materials for existing pipelines and drainage equipment - Google Patents

Description

The present invention relates to repair materials for existing pipelines and drainage equipment.

For example, Patent Document 1 discloses a repair member for repairing an existing pipeline. The existing pipeline is, for example, a riser pipe connected to an opening above a manhole. The repair member comprises a cylindrical body extending vertically and a sealing member extending radially outward from the lower end of the cylindrical body. A raised portion that rises upward is formed at the bottom of the manhole.

When repairing a riser pipe connected to a manhole, first insert the repair member into the riser pipe until it abuts against the raised portion of the manhole. At this time, the repair member is supported by the raised portion. The tip portion of the sealing member contacts the inner peripheral surface of the riser pipe and is bent in the axial direction of the repair member. After the repair member has been inserted in this way, mortar is filled into the space between the cylindrical body of the repair member and the inner peripheral surface of the riser pipe above the sealing member. Then, when the mortar hardens, the repair of the riser pipe with the repair member is completed.

Patent No. 6120681

However, depending on the type of manhole, there may be some that do not have a raised portion at the bottom of the manhole. In this way, when repairing a riser pipe connected to a manhole without a raised portion, the repair member is inserted into the riser pipe while being spaced upward from the bottom of the manhole. At this time, the repair member is supported by the inner peripheral surface of the riser pipe because the sealing member is in contact with the inner peripheral surface of the riser pipe. In this state, mortar is filled and hardened between the cylindrical body of the repair member and the inner peripheral surface of the riser pipe. At this time, the contact portion between the sealing member and the riser pipe alone cannot support the repair member, and the repair member may fall into the riser pipe, i.e., move downward. It is preferable that the drop of the repair member is small, and by making the drop smaller, the repair work becomes easier.

The present invention was made in consideration of these points, and its purpose is to provide repair materials for existing pipelines and drainage equipment that make it easy to repair the existing pipelines that are the subject of repair using the repair materials.

The repair member for an existing pipeline according to the present invention is a repair member that is inserted into an existing pipeline to repair the existing pipeline. The repair member includes a cylindrical body extending vertically and a sealing member protruding radially outward from the cylindrical body. The cylindrical body has a large diameter portion, a small diameter portion, and a connecting portion. The large diameter portion is disposed above the sealing member and has an outer diameter of a first outer diameter. The small diameter portion is disposed above the sealing member and below the large diameter portion and has an outer diameter of a second outer diameter smaller than the first outer diameter. The connecting portion connects the large diameter portion and the small diameter portion.

According to the above-mentioned repair member for an existing pipeline, when repairing an existing pipeline to be repaired, the repair member is inserted into the existing pipeline with the tip portion of the seal member in contact with the inner circumferential surface of the existing pipeline. When the repair member is inserted, a space is formed between the cylindrical body and the inner circumferential surface of the existing pipeline, and the filler material is filled into the space. At this time, the filler material is also filled around the connecting portion between the large diameter portion and the small diameter portion of the repair member. Here, as the filler material hardens, the filler material engages with the connecting portion. The connecting portion connects the large diameter portion and the small diameter portion located below the large diameter portion, and is located facing downward rather than horizontally. Therefore, the filler material located below the connecting portion and engaged with the connecting portion supports the connecting portion. In this way, since the connecting portion of the repair member is supported by the solidified filler material, it is possible to make it difficult for the repair member to fall into the existing pipeline. Therefore, since it is possible to suppress the repair member from falling, it is easy to repair the existing pipeline using the repair member.

According to another preferred embodiment of the present invention, the cylindrical body has a vertical cylindrical portion that is disposed above the large diameter portion and extends vertically. The small diameter portion constitutes the lower end of the cylindrical body. The inner diameter of the small diameter portion is larger than the inner diameter of the vertical cylindrical portion.

A worker may inspect the inside of an existing pipeline after repair. When inspecting the inside of an existing pipeline after repair, for example, a rod-shaped inspection tool is inserted into the cylindrical body of the repair member. According to the above embodiment, the inner diameter of the small diameter portion that constitutes the lower end of the cylindrical body is large, so that the inspection tool can be easily inserted below the cylindrical body.

According to another preferred embodiment of the present invention, the outer peripheral surface of the connecting portion has an inclined surface that is inclined from the large diameter portion toward the small diameter portion.

According to the above aspect, when filling the space between the cylindrical body of the repair member and the inner circumferential surface of the existing pipeline with filler material, the filler material flows downward along the inclined surface of the connecting portion. This makes it easier for the filler material to flow downward along the inclined surface. In addition, since the outer circumferential surface of the connecting portion is an inclined surface, the surface area of the outer circumferential surface of the connecting portion can be increased. Therefore, the inclined surface of the connecting portion can be supported by a larger amount of filler material, and the load of the repair member is distributed. As a result, it is possible to make it more difficult for the repair member to fall into the existing pipeline.

According to another preferred embodiment of the present invention, at least the outer peripheral surface of the connecting portion is given a matte finish.

According to the above aspect, the matte finish can be applied to the outer circumferential surface of the connecting part to make it rough. This allows the filler to be firmly engaged with the outer circumferential surface of the connecting part. This makes it difficult for the connecting part to shift relative to the solidified filler.

According to another preferred aspect of the present invention, the end face of the sealing member is provided with a visual confirmation means for an operator to confirm that it is the end face.

According to the above aspect, for example, when the repair member is inserted into the existing pipeline, the seal member comes into contact with the inner circumferential surface of the existing pipeline. At this time, the end face of the seal member faces in the opposite direction to the insertion direction of the repair member. When the worker visually inspects the inside of the existing pipeline from the insertion direction of the repair member, the worker can easily check the orientation of the end face of the seal member by checking the position of the visual confirmation means.

According to another preferred aspect of the present invention, the end surface of the sealing member is formed in a first color. The surface of the sealing member other than the end surface is formed in a second color different from the first color.

According to the above aspect, the worker can easily check the orientation of the end face of the sealing member by simply checking the position of the first color.

The drainage equipment according to the present invention comprises a manhole and any of the repair members for existing pipelines described above. The manhole has a straight cylindrical section that opens upward and extends vertically, and a cylindrical body section with a bottom that is connected to the straight cylindrical section and has an inlet and an outlet. The repair member is inserted into the straight cylindrical section so that the outer peripheral surface of the cylindrical section is spaced apart from the inner peripheral surface of the straight cylindrical section. The sealing member is in contact with the inner peripheral surface of the straight cylindrical section. The space between the straight cylindrical section and the cylindrical section is filled with a filler material.

According to the above-mentioned drainage equipment, if the straight cylindrical portion of the manhole becomes deteriorated or damaged, it is easy to repair the straight cylindrical portion using the repair member of the present invention.

The present invention provides repair materials for existing pipelines and drainage equipment that make it easy to repair the existing pipelines to be repaired using the repair materials.

FIG. 2 is a cross-sectional view of a drainage system having a manhole after being repaired using a repair member in the first embodiment. FIG. 2 is a front view of the repair member according to the first embodiment. FIG. 2 is a cross-sectional view of a repair member according to the first embodiment. 4 is a cross-sectional view taken along line IV-IV of FIG. 1. FIG. 2 is a diagram showing a procedure for repairing a manhole using a repair member, and corresponds to FIG. 1 . FIG. 2 is a diagram showing a procedure for repairing a manhole using a repair member, and corresponds to FIG. 1 . FIG. 2 is a diagram showing a procedure for repairing a manhole using a repair member, and corresponds to FIG. 1 . FIG. 2 is a diagram showing a procedure for repairing a manhole using a repair member, and corresponds to FIG. 1 . FIG. 2 is a diagram showing a procedure for repairing a manhole using a repair member, and corresponds to FIG. 1 . FIG. 11 is a front view of a repair member according to a second embodiment.

One embodiment of the present invention will be described below. Note that the embodiment described here is, of course, not intended to limit the present invention in any particular way. In addition, the same reference numerals will be used to designate components and parts that perform the same function, and duplicate descriptions will be omitted or simplified as appropriate.

First Embodiment
1 is a cross-sectional view of a drainage facility 100 after repairing an existing pipeline using a repair member 10 in the first embodiment. First, the repair member 10 for an existing pipeline according to the first embodiment (hereinafter, simply referred to as the repair member) will be described. The repair member 10 is a member that is inserted into an existing pipeline in order to repair a deteriorated or damaged existing pipeline.

Here, "existing pipeline" refers to a pipeline that has already been installed, and is already being used as a pipeline through which water (e.g., wastewater) flows. The existing pipeline may be one that is buried underground, or one that is located above ground. In this embodiment, the manhole 50 provided in the drainage system 100 is given as an example of an existing pipeline. The drainage system 100 will be described below.

In this embodiment, as shown in FIG. 1, the drainage system 100 is buried underground and is a system through which drainage flows. "Drainage" means discharged water. Drainage includes so-called sewage and rainwater. Drainage is water for daily use discharged from facilities such as toilets, bathtubs, and kitchen sinks.

The inlet 50 included in the drainage system 100 is, for example, a public inlet. However, the type of inlet 50 is not limited to public inlets. The inlet 50 includes a straight tube portion 51 and a main body portion 52.

The straight tube portion 51 is a cylindrical member that extends vertically and opens upward. The upper end of the straight tube portion 51 is flush with the ground. In this embodiment, before the manhole 50 is repaired, a lid 53 (see FIG. 5) is removably attached to the upper end of the straight tube portion 51.

The main body 52 is a bottomed cylinder connected to the straight cylinder 51. Here, the main body 52 is disposed below the straight cylinder 51 and is internally connected to the straight cylinder 51. The main body 52 is formed with an inlet 55 and an outlet 56. The inlet 55 and the outlet 56 open to the side. The inlet 55 is connected to an inlet pipe 61 that is connected to a facility (not shown) such as a toilet that discharges wastewater. The outlet 56 is connected to an outlet pipe 62 that is connected to a sewer main pipe (not shown) from which wastewater is discharged.

In this embodiment, the inlet 55 and the outlet 56 are formed in opposing positions. The positions of the inlet 55 and the outlet 56 in the main body 52 are not particularly limited. For example, the outlet 56 may be formed in the bottom of the main body 52 and open downward. In this embodiment, the number of inlet 55 and the number of outlet 56 are one each, but are not particularly limited. In addition, the inlet 55 is smaller than the outlet 56, but the sizes of the inlet 55 and the outlet 56 are also not particularly limited.

An invert 57 is formed at the bottom of the main body 52, connecting the inlet 55 and the outlet 56. Wastewater that flows into the main body 52 from the inlet 55 flows through the invert 57 toward the outlet 56.

In this embodiment, the manhole 50 is made of concrete. That is, the straight tube portion 51 and the main body portion 52 are made of concrete. However, the material forming the manhole 50 is not limited to concrete. The straight tube portion 51 and the main body portion 52 may be integrally formed, or may be formed by assembling multiple members. For example, the straight tube portion 51 may be formed by stacking multiple cylindrical members one on top of the other.

The shape of the manhole 50 is not particularly limited. In this embodiment, for example, the outer and inner peripheral shapes of the straight tube portion 51 and the main body portion 52 of the manhole 50 are circular in plan view. However, the outer and inner peripheral shapes of the straight tube portion 51 and the main body portion 52 may be angular in plan view. In other words, the manhole 50 may be a square manhole.

However, for example, if a portion of the straight tube portion 51 of the manhole 50 is deteriorated or damaged (hereinafter simply referred to as damage), the drainage water inside may leak from the damaged portion. Therefore, in this embodiment, a repair member 10 is used to repair the manhole 50, which is an example of an existing pipeline. The repair member 10 is inserted into the manhole 50 in order to repair the manhole 50. Here, "repair" refers to restoring the function of the damaged manhole 50 as a pipeline. Repair using the repair member 10 prevents the drainage water flowing inside the manhole 50 from leaking to the outside, and prevents water outside the manhole 50 from entering through the damaged portion.

2 and 3 are respectively a front view and a cross-sectional view of the repair member 10. FIG. 4 is a cross-sectional view of the IV-IV cross section of FIG. 1. Note that in FIG. 4, the inlet pipe 61 and the outlet pipe 62 are omitted. As shown in FIG. 2, the repair member 10 according to this embodiment includes a cylindrical body 11, a sealing member 30, and a support member 40. The cylindrical body 11 has a cylindrical shape extending vertically. Although the material of the cylindrical body 11 is not particularly limited, in this embodiment, the cylindrical body 11 is made of resin. The cylindrical body 11 has a vertical cylindrical portion 12, a large diameter portion 13, a small diameter portion 14, an upper connecting portion 15, and a lower connecting portion 16. Here, the vertical cylindrical portion 12, the upper connecting portion 15, the large diameter portion 13, the lower connecting portion 16, and the small diameter portion 14 are arranged in this order from the top to the bottom of the cylindrical body 11.

The vertical tube section 12 is a tube extending vertically, and is disposed above the large diameter section 13. The small diameter section 14 constitutes the lower end of the tube body 11, and is disposed below the large diameter section 13. The upper connecting section 15 is disposed between the vertical tube section 12 and the large diameter section 13, and connects the vertical tube section 12 and the large diameter section 13. The upper connecting section 15 is an example of another connecting section of the present invention. The lower connecting section 16 is disposed between the large diameter section 13 and the small diameter section 14, and connects the large diameter section 13 and the small diameter section 14. The lower connecting section 16 is an example of a connecting section of the present invention.

In this embodiment, the outer diameter of the vertical tube portion 12 is smaller than the outer diameter of the large diameter portion 13 and smaller than the outer diameter of the small diameter portion 14. The outer diameter of the large diameter portion 13 is larger than the outer diameter of the small diameter portion 14. Here, the outer diameter of the large diameter portion 13 is the first outer diameter D11. The outer diameter of the small diameter portion 14 is the second outer diameter D12. The second outer diameter D12 is smaller than the first outer diameter D11. The outer diameter of the vertical tube portion 12 is the third outer diameter D13. The third outer diameter D13 is smaller than the first outer diameter D11 and smaller than the second outer diameter D12. However, the third outer diameter D13 may be the same as the first outer diameter D11 or the second outer diameter D12. Also, the third outer diameter D13 may be larger than the first outer diameter D11 or the second outer diameter D12. In this embodiment, the large diameter portion 13 is the portion of the cylindrical body 11 that has the largest outer diameter.

In this embodiment, as shown in FIG. 3, the relationship of the inner diameters in the cylindrical body 11 is the same as the relationship of the outer diameters described above. That is, the inner diameter of the vertical cylindrical portion 12 is smaller than the inner diameter of the large diameter portion 13 and smaller than the inner diameter of the small diameter portion 14. The inner diameter of the large diameter portion 13 is larger than the inner diameter of the small diameter portion 14. Here, the inner diameter of the large diameter portion 13 is the first inner diameter D21. The inner diameter of the small diameter portion 14 is the second inner diameter D22. The second inner diameter D22 is smaller than the first inner diameter D21. The inner diameter of the vertical cylindrical portion 12 is the third inner diameter D23. The third inner diameter D23 is smaller than the first inner diameter D21 and smaller than the second inner diameter D22. However, the relationship between the first inner diameter D21, the second inner diameter D22, and the third inner diameter D23 is not limited to the above. For example, the first inner diameter D21, the second inner diameter D22, and the third inner diameter D23 may be the same. The third inner diameter D23 may be larger than the second inner diameter D22.

In this embodiment, the outer peripheral surface of the upper connecting portion 15 has an upper inclined surface 17 that is inclined from the vertical tube portion 12 toward the large diameter portion 13. The upper inclined surface 17 is inclined radially outward of the cylindrical body 11 as it moves from the vertical tube portion 12 toward the large diameter portion 13. The outer peripheral surface of the lower connecting portion 16 has a lower inclined surface 18 that is inclined from the large diameter portion 13 toward the small diameter portion 14. The lower inclined surface 18 is inclined radially inward of the cylindrical body 11 as it moves from the large diameter portion 13 toward the small diameter portion 14.

In this embodiment, the vertical dimension D31 of the lower connecting portion 16 is larger than the vertical dimension D32 of the upper connecting portion 15. The vertical dimension D33 of the vertical tube portion 12 is larger than the dimension D31 of the lower connecting portion 16 and is also larger than the dimension D32 of the upper connecting portion 15. However, the relationship between the dimensions D31, D32, and D33 is not limited to the above.

In this embodiment, as shown in FIG. 2, the outer peripheral surface of the cylindrical body 11 is subjected to a matte finish 20. The matte finish 20 is a process for roughening the outer peripheral surface of the cylindrical body 11, in other words, a process for making the outer peripheral surface uneven. The matte finish 20 includes, for example, a sand-applied process. The sand-applied process is realized by applying an adhesive containing sand to the outer peripheral surface of the cylindrical body 11. The matte finish 20 may be applied only to a part of the outer peripheral surface of the cylindrical body 11. Here, the matte finish 20 is applied to the outer peripheral surfaces of the lower part of the vertical cylindrical portion 12, the upper connecting portion 15, the large diameter portion 13, the lower connecting portion 16, and the small diameter portion 14, that is, the outer peripheral surface of the lower part of the cylindrical body 11. However, the position of the matte finish 20 is not particularly limited. For example, the matte finish 20 may be applied to the outer peripheral surface of the upper part of the cylindrical body 11, or may be applied to the outer peripheral surface of the central parts of the upper and lower parts of the cylindrical body 11. The textured finish 20 may be applied to the outer surface of the left half of the cylindrical body 11, or to the outer surface of the right half of the cylindrical body 11. Of course, the textured finish 20 may be applied to the entire outer surface of the cylindrical body 11. In this way, by applying the textured finish 20, when the filler 60 (see FIG. 1) described later is filled into the space between the square 50 and the cylindrical body 11 and hardened, the filler 60 and the textured finish 20 are easily interlocked, making it difficult for the filler 60 to slip out of the space.

As shown in FIG. 2, the seal member 30 is disposed along the periphery of the outer peripheral surface of the cylindrical body 11 and protrudes radially outward from the cylindrical body 11. In this embodiment, the seal member 30 is attached to the lower end of the cylindrical body 11, here the small diameter portion 14. Here, the vertical cylindrical portion 12, the upper connecting portion 15, the large diameter portion 13, the lower connecting portion 16 and the small diameter portion 14 of the cylindrical body 11 are disposed above the seal member 30. The seal member 30 may be attached to a portion other than the lower end of the cylindrical body 11. As shown in FIG. 4, the seal member 30 is annular and is formed over the entire circumference of the outer peripheral surface of the cylindrical body 11. Here, the outer peripheral shape of the seal member 30 corresponds to the inner peripheral shape of the straight cylindrical portion 51 of the manhole 50. When the inner peripheral shape of the straight cylindrical portion 51 is circular in a plan view as in this embodiment, the outer peripheral shape of the seal member 30 is also circular in a plan view. For example, if the inner peripheral shape of the straight cylindrical portion 51 is angular in plan view, the outer peripheral shape of the seal member 30 is also angular in plan view. In this embodiment, the outer diameter of the seal member 30 is larger than the outermost diameter of the cylindrical body 11. Here, the outermost diameter of the cylindrical body 11 is the outer diameter of the large diameter portion 13. Therefore, the outer diameter of the seal member 30 is larger than the outer diameter of the large diameter portion 13 of the cylindrical body 11, i.e., the first outer diameter D11.

The material of the seal member 30 is not particularly limited. In this embodiment, the seal member 30 is made of a flexible material. Examples of materials for the seal member 30 include rubber and foamed rubber, and among these, ethylene propylene diene rubber (EPDM) is preferable. For example, the seal member 30 may be made of a hard material as long as it can seal with the inner surface of the straight cylindrical portion 51 of the manhole 50. In addition, the method of attaching the seal member 30 to the cylindrical body 11 is not particularly limited, but in this embodiment, the seal member 30 is attached to the cylindrical body 11 with an adhesive.

In this embodiment, the end face 31 of the seal member 30 is provided with a visual confirmation means 32 that allows an operator to confirm that it is the end face 31. Here, the end face 31 of the seal member 30 refers to the surface that faces radially outward of the cylindrical body 11 when the seal member 30 is not deflected. The end face 31 refers to the outer peripheral surface of the seal member 30. The visual confirmation means 32 is provided around the entire circumference of the end face 31.

The specific configuration for realizing the visual confirmation means 32 is not particularly limited. In this embodiment, the visual confirmation means 32 is realized by making the color of the end face 31 of the seal member 30 different from the color of the surface of the seal member 30 other than the end face 31. Here, the end face 31 of the seal member 30 is formed in a first color CL1. The surface of the seal member 30 other than the end face 31 is formed in a second color CL2. The second color CL2 is a color different from the first color CL1, for example, black. The second color CL2 is, for example, the color of the material of the seal member 30 (here, the color of rubber). In this embodiment, when the repair member 10 is inserted into the manhole 50, the inside of the manhole 50 is in a dark state. Therefore, it is preferable that the first color CL1 is a color that is easy to distinguish in the dark. For example, the first color CL1 is a fluorescent color or yellow. The first color CL1 may be realized, for example, by applying paint to the end face 31 of the seal member 30, or by attaching a sealant.

Here, as shown in FIG. 1, when the repair member 10 is inserted into the manhole 50, the sealing member 30 bends upward in the axial direction of the cylindrical body 11, and the end face 31 of the sealing member 30 faces upward. Here, when an operator visually inspects the repair member 10 through the opening of the straight cylindrical portion 51 of the manhole 50, as shown in FIG. 4, the operator can confirm that the end face 31, on which the visual inspection means 32 is provided, extends around the entire outer periphery of the cylindrical body 11, thereby confirming that the repair member 10 has been properly sealed by the sealing member 30.

As shown in FIG. 2, the support member 40 is a member that supports the seal member 30 when the seal member 30 is bent in the axial direction of the cylindrical body 11. The support member 40 is formed separately from the cylindrical body 11 and is attached to the cylindrical body 11. However, the support member 40 may be formed integrally with the cylindrical body 11. The support member 40 protrudes radially outward from the cylindrical body 11. The support member 40 is annular and is formed around the entire outer circumferential surface of the cylindrical body 11.

In this embodiment, the support member 40 is located above the seal member 30 and is in contact with the seal member 30. Here, the support member 40 is bonded and fixed to the seal member 30 by an adhesive. The thickness of the support member 40 is thinner than the thickness of the seal member 30. The support member 40 may be formed of a material harder than the seal member 30. Here, the support member 40 is made of resin. In this embodiment, the radial protrusion dimension of the support member 40 from the cylindrical body 11 is smaller than the radial protrusion dimension of the seal member 30 from the cylindrical body 11. That is, the seal member 30 protrudes radially outward beyond the support member 40. In addition, the outer diameter of the support member 40 is larger than the outermost diameter of the cylindrical body 11, which is the first diameter D11, which is the outer diameter of the large diameter portion 13 here.

As shown in FIG. 1, when the sealing member 30 of the repair member 10 is inserted into the manhole 50, it contacts the inner peripheral surface of the manhole 50. More specifically, the tip portion of the sealing member 30 contacts the inner peripheral surface of the straight tube portion 51 of the manhole 50. In this embodiment, a space is formed above the sealing member 30 between the straight tube portion 51 of the manhole 50 and the cylinder 11 of the repair member 10. This space is filled with a filler 60. Here, mortar is used as the filler 60. However, the type of the filler 60 is not particularly limited. For example, a liquid hardening injection material may be used as the filler 60. As the hardening injection material, an epoxy resin, an acrylic resin, or an unsaturated polyester resin that is hardenable at room temperature and inexpensive and has excellent adhesion is preferable.

Next, the procedure for repairing the manhole 50 using the repair member 10 will be described. Figures 5 to 9 are diagrams showing the procedure for repairing using the repair member 10. Here, we will explain the case where part A of the straight cylindrical portion 51 of the manhole 50 is damaged, as shown in Figure 5.

First, remove the lid 53 provided at the upper end of the straight tube portion 51 of the tubular container 50. Then, as shown in FIG. 6, insert the repair member 10 from the upper end of the straight tube portion 51. The repair member 10 is inserted into the center of the straight tube portion 51 so that the outer circumferential surface of the tube body 11 is separated from the inner circumferential surface of the straight tube portion 51. At this time, it is preferable to insert the repair member 10 so that the central axis of the repair member 10 and the central axis of the straight tube portion 51 overlap. However, since a part of the seal member 30 protrudes outward from the support member 40, when the repair member 10 is inserted into the straight tube portion 51, the tip portion of the seal member 30 contacts the inner circumferential surface of the straight tube portion 51 and bends in the axial direction of the tube body 11 in the opposite direction to the insertion direction (here, upward). In this way, the repair member 10 is inserted while the seal member 30 bends in the axial direction of the tube body 11.

When the seal member 30 is bent, the end face 31 of the seal member 30 faces upward. When the worker visually inspects the inside of the straight tube portion 51 from the top end of the straight tube portion 51, the worker checks the position of the end face 31 of the seal member 30 using the visual inspection means 32. At this time, as shown in FIG. 4, by checking that the shape of the end face 31 of the seal member 30 is annular, the worker can confirm that the repair member 10 has been properly inserted into the straight tube portion 51.

In this embodiment, as shown in FIG. 6, the repair member 10 is inserted to a position above the inlet 55 and outlet 56 of the manhole 50. Therefore, within the manhole 50, the repair member 10 is positioned away from the bottom of the main body 52 (in other words, the invert 57).

In this embodiment, a portion of the tubular body 11 of the repair member 10 protrudes from the ground. Therefore, a fixing band 72 is attached to the position of the tubular body 11 protruding from the ground to temporarily fix the repair member 10. Because the fixing band 72 is in contact with the ground, the repair member 10 is less likely to move up and down. Note that attaching the fixing band 72 to the tubular body 11 may be omitted.

After the repair member 10 is inserted into the mast 50 in this way, as shown in FIG. 7, the space between the tubular body 11 of the repair member 10 and the straight tubular portion 51 of the mast 50 is filled with filler 60. At this time, the amount of filler 60 to be filled is not particularly limited, but it is preferable to fill the filler 60 up to a position slightly lower than the position where the tubular body 11 is cut, for example. When filling the filler 60, a small amount of filler 60 may be first filled and allowed to harden, and then the remaining filler 60 may be filled. This makes it difficult for the repair member 10 to shift and makes it easier to fix it in the appropriate position.

Then, as shown in Figure 8, remove the fixing band 72 from the repair member 10 and cut off the portion of the cylindrical body 11 that protrudes above the ground. At this time, taking into account the thickness of the lid 25 (see Figure 9) that will be attached to the upper end of the cylindrical body 11, it is advisable to cut off the cylindrical body 11 by the total length of the length of the cylindrical body 11 that protrudes above the ground and the thickness of the lid 25.

After cutting the cylindrical body 11, as shown in FIG. 9, a lid 25 is attached to the upper end of the cylindrical body 11, and the remaining space between the cylindrical body 11 and the inner surface of the straight cylindrical portion 51 is filled with a filler material 60. The repair of the manhole 50 is completed when the filler material 60 hardens.

As described above, the drainage equipment 100 according to this embodiment includes a manhole 50 and a repair member 10, as shown in FIG. 1. The manhole 50 has a straight cylindrical portion 51 that opens upward and extends vertically, and a bottomed cylindrical main body portion 52 that is connected to the straight cylindrical portion 51 and has an inlet 55 and an outlet 56 formed therein. The repair member 10 is a member that is inserted into the manhole 50 to repair the manhole 50, which is an example of an existing pipeline. As shown in FIG. 2, the repair member 10 includes a cylindrical body 11 that extends vertically, and a seal member 30 that protrudes radially outward from the cylindrical body 11. The cylindrical body 11 has a large diameter portion 13, a small diameter portion 14, and a lower connecting portion 16. The large diameter portion 13 is disposed above the seal member 30, and has an outer diameter of a first outer diameter D11. The small diameter portion 14 is disposed above the seal member 30 and below the large diameter portion 13, and has a second outer diameter D12 that is smaller than the first outer diameter D11. The lower connecting portion 16 connects the large diameter portion 13 and the small diameter portion 14.

In this embodiment, as shown in FIG. 1, when repairing the straight tube portion 51 of the manhole 50, the repair member 10 is inserted into the straight tube portion 51 so that the outer circumferential surface of the tube body 11 is separated from the inner circumferential surface of the straight tube portion 51. At this time, the seal member 30 is bent and contacts the inner circumferential surface of the straight tube portion 51. When the repair member 10 is inserted, a space is formed between the tube body 11 and the inner circumferential surface of the straight tube portion 51, and the filler material 60 is filled into the space. At this time, the filler material 60 is also filled around the lower connecting portion 16 between the large diameter portion 13 and the small diameter portion 14 of the repair member 10. Here, the filler material 60 hardens, and the filler material 60 engages with the lower connecting portion 16. The lower connecting portion 16 connects the large diameter portion 13 and the small diameter portion 14 arranged below the large diameter portion 13, and is arranged facing downward rather than horizontally. Therefore, the filler 60, which is disposed below the lower connecting portion 16 and engages with the lower connecting portion 16, supports the lower connecting portion 16. In this way, the lower connecting portion 16 of the repair member 10 is supported by the solidified filler 60, so that the repair member 10 is less likely to fall into the straight tube portion 51 of the manhole 50. Therefore, because the fall of the repair member 10 can be suppressed, it is easy to repair the straight tube portion 51 using the repair member 10.

In this embodiment, the large diameter portion 13 protrudes outward from the cylindrical body 11 beyond the vertical cylindrical portion 12 of the cylindrical body 11. Therefore, the portion of the cylindrical body 11 where the large diameter portion 13 protrudes beyond the vertical cylindrical portion 12 does not need to be filled with the filler 60. Therefore, the amount of filler 60 to be filled can be reduced by the size of the portion where the large diameter portion 13 protrudes beyond the vertical cylindrical portion 12.

In this embodiment, as shown in FIG. 2, the cylinder 11 has a vertical cylinder portion 12 that is arranged above the large diameter portion 13 and extends vertically, and an upper connecting portion 15 that connects the vertical cylinder portion 12 and the large diameter portion 13. The outer diameter of the vertical cylinder portion 12 is a third outer diameter D13 that is smaller than the first outer diameter D11. In this way, the upper connecting portion 15 connects the large diameter portion 13 and the vertical cylinder portion 12 that is arranged above the large diameter portion 13 and has a smaller outer diameter, so that it is arranged facing upward rather than horizontally. Therefore, the filler 60 that engages with the upper connecting portion 15 is in a state of suspending and supporting the upper connecting portion 15. This makes it possible to prevent the repair member 10 from falling into the straight cylinder portion 51.

In addition, in this embodiment, when filling the gap between the tube body 11 of the repair member 10 and the straight tube portion 51 of the manhole 50 with the filling material 60, the filling material 60 flows along the upper connecting portion 15 toward a lower portion of the upper connecting portion 15 (e.g., toward the lower connecting portion 16). Therefore, the upper connecting portion 15 makes it easier for the filling material 60 to flow toward the lower connecting portion 16, etc. In addition, because the upper connecting portion 15 protrudes outward from the vertical tube portion 12, the amount of filling material 60 can be reduced by the size of the protruding portion of the upper connecting portion 15.

In this embodiment, as shown in FIG. 3, the vertical dimension D31 of the lower connecting portion 16 is larger than the vertical dimension D32 of the upper connecting portion 15. This increases the surface area of the lower connecting portion 16 that engages with the solidified filler material 60. This allows the lower connecting portion 16 to be supported by a larger amount of filler material 60. This makes it more difficult for the repair member 10 to fall into the straight tube portion 51.

In this embodiment, for example, after repairing the straight cylindrical portion 51 of the manhole 50, a worker may inspect the inside of the manhole 50. When inspecting the manhole 50 after repair, for example, a rod-shaped inspection tool (not shown) is inserted into the cylindrical body 11 of the repair member 10. In particular, when inspecting the inside of the inlet pipe 61 connected to the inlet 55 of the manhole 50 or the outlet pipe 62 connected to the outlet 56, the inspection tool is inserted obliquely into the cylindrical body 11 toward the inlet 55 or the outlet 56. In this embodiment, as shown in FIG. 3, the small diameter portion 14 constitutes the lower end of the cylindrical body 11. The inner diameter D22 of the small diameter portion 14 is larger than the inner diameter D23 of the vertical cylindrical portion 12. In this way, since the inner diameter of the small diameter portion 14 constituting the lower end of the cylindrical body 11 is large, it is easy to insert the inspection tool when inserting it below the cylindrical body 11 (for example, when inserting it obliquely into the cylindrical body 11 toward the inlet 55 or the outlet 56).

In this embodiment, the outer peripheral surface of the lower connecting portion 16 has a downward inclined surface 18 that is inclined from the large diameter portion 13 toward the small diameter portion 14. As a result, when filling the space between the cylindrical body 11 of the repair member 10 and the inner peripheral surface of the straight cylindrical portion 51 of the manhole 50 with the filler 60, the filler 60 flows downward along the downward inclined surface 18 from the downward inclined surface 18. Therefore, the filler 60 is easily caused to flow downward along the downward inclined surface 18. In addition, since the outer peripheral surface of the lower connecting portion 16 is the downward inclined surface 18, the surface area of the outer peripheral surface of the lower connecting portion 16 can be increased. Therefore, since the lower inclined surface 18 of the lower connecting portion 16 can be supported by a larger amount of filler 60, the load of the repair member 10 is distributed. As a result, the repair member 10 is less likely to fall into the manhole 50.

In this embodiment, as shown in FIG. 2, at least the outer peripheral surface of the lower connecting portion 16 (here, the lower inclined surface 18) is subjected to a matte finish 20. Here, the matte finish 20 is a sanding process. By applying the matte finish 20 in this way, the lower inclined surface 18 of the lower connecting portion 16 can be roughened. This allows the filler material 60 to be firmly engaged with the lower inclined surface 18. This makes it difficult for the lower connecting portion 16 to slip relative to the solidified filler material 60.

In this embodiment, the end face 31 of the sealing member 30 is provided with a visual confirmation means 32 that allows the worker to confirm that it is the end face 31. For example, as shown in FIG. 1, when the repair member 10 is inserted into the straight tube portion 51 of the manhole 50, the sealing member 30 contacts the inner peripheral surface of the straight tube portion 51 while bending in the axial direction of the cylinder 11. At this time, the end face 31 of the sealing member 30 faces in the opposite direction (upward in this case) to the insertion direction of the repair member 10. When the worker visually checks inside the straight tube portion 51 from the insertion direction of the repair member 10, the worker can easily confirm the orientation of the end face 31 of the sealing member 30 by checking the position of the visual confirmation means 32.

In this embodiment, as shown in FIG. 2, the end face 31 of the seal member 30 is formed in a first color CL1. The surface of the seal member 30 other than the end face 31 is formed in a second color CL2 that is different from the first color CL1. This allows the worker to easily check the orientation of the end face 31 of the seal member 30 by the simple method of checking the position of the first color CL1.

Second Embodiment
Next, a repair member for an existing pipeline according to a second embodiment will be described. Fig. 10 is a front view of a repair member 10A according to the second embodiment.

As shown in FIG. 10, the cylindrical body 11A of the repair member 10A according to this embodiment includes a vertical cylindrical portion 12, a large diameter portion 13A, a small diameter portion 14A, an upper connecting portion 15A, and a lower connecting portion 16A. The large diameter portion 13A is disposed below the vertical cylindrical portion 12 and is a cylindrical portion extending vertically. The small diameter portion 14A is disposed below the large diameter portion 13A and is a cylindrical portion extending vertically. Here, the vertical dimension D41 of the small diameter portion 14A is smaller than the vertical dimension D42 of the large diameter portion 13A, but may be the same as the dimension D42 or may be larger than the dimension D42.

In this embodiment, the upper connecting portion 15A and the lower connecting portion 16A are not inclined and extend in the radial direction of the cylindrical body 11A. The upper connecting portion 15A connects the lower end of the vertical cylindrical portion 12 and the upper end of the large diameter portion 13A. The upper connecting portion 15A extends radially outward from the lower end of the vertical cylindrical portion 12 toward the upper end of the large diameter portion 13A. Here, a step is formed by the vertical cylindrical portion 12, the upper connecting portion 15A, and the large diameter portion 13A.

The lower connecting portion 16A connects the lower end of the large diameter portion 13A and the upper end of the small diameter portion 14A. The lower connecting portion 16A extends radially inward of the cylindrical body 11A from the lower end of the large diameter portion 13A toward the upper end of the small diameter portion 14A. Here, a step is formed by the large diameter portion 13A, the lower connecting portion 16A, and the small diameter portion 14A.

Even in this embodiment, the lower connecting portion 16A connects the large diameter portion 13A and the small diameter portion 14A that is disposed below the large diameter portion 13A, and is disposed facing downward rather than horizontally. Therefore, as the filling material 60 hardens, the filling material 60 engages with the lower connecting portion 16A, and the filling material 60 engaged with the lower connecting portion 16A is in a state of supporting the lower connecting portion 16A. This makes it difficult for the repair member 10A to fall into the straight tube portion 51 of the manhole 50. Therefore, since the falling of the repair member 10A can be suppressed, it is easy to repair the straight tube portion 51 using the repair member 10A.

In each of the above embodiments, the small diameter portion 14, 14A constitutes the lower end portion of the cylindrical body 11, 11A. However, the small diameter portion 14, 14A may constitute the upper or lower central portion of the cylindrical body 11, 11A, or may constitute the upper portion of the cylindrical body 11, 11A. The large diameter portion 13, 13A may constitute the upper portion of the cylindrical body 11, 11A.

10 Repair parts (repair parts for existing pipelines)
11 Cylinder body 12 Vertical cylinder portion 13 Large diameter portion 14 Small diameter portion 15 Upper connecting portion (other connecting portion)
16 Lower connecting part (connecting part)
17 Upper inclined surface 18 Lower inclined surface (slanted surface)
20 Satin finish (sanding)
30 Sealing member 32 Visual inspection means 50 Inlet (existing pipeline)
51 Straight cylinder part 52 Main body part 55 Inflow port 56 Outflow port 100 Drainage equipment

Claims (5)

A repair member that is inserted into an existing pipeline to repair the existing pipeline,
The existing pipeline is:
A straight cylinder portion that opens upward and extends vertically;
A bottomed cylindrical main body portion connected to the straight cylindrical portion and having an inlet and an outlet formed therein;
It has
A cylindrical body extending vertically,
a seal member protruding radially outward from the cylindrical body;
Equipped with
the seal member is configured so as not to be supported from below by the main body portion, and is disposed above the inlet and the outlet;
a tip portion of the sealing member is configured to contact an inner circumferential surface of the straight cylindrical portion when inserted into the chamber;
The cylindrical body is
a large diameter portion disposed above the seal member and having an outer diameter of a first outer diameter;
a small diameter portion that is disposed above the seal member and below the large diameter portion and has a second outer diameter smaller than the first outer diameter;
a connecting portion connecting the large diameter portion and the small diameter portion;
having
The connecting portion is disposed facing downward from the horizontal direction,
an outer circumferential surface of the connecting portion has an inclined surface that is inclined from the large diameter portion toward the small diameter portion,
A repair member for an existing pipeline, in which, when inserted into the manhole, the space between the straight tube portion and the cylindrical body above the sealing member is filled with a hardening material that is filled and then hardened. The cylindrical body has a vertical cylindrical portion that is disposed above the large diameter portion and extends vertically,
the small diameter portion constitutes a lower end portion of the cylindrical body,
The repair member for an existing pipeline according to claim 1 , wherein an inner diameter of the small diameter portion is larger than an inner diameter of the vertical tube portion. 3. The repair member for an existing pipeline according to claim 1, wherein at least an outer circumferential surface of the connecting portion is subjected to a matte finish. an end surface of the seal member is formed in a first color;
4. A repair member for an existing pipeline as described in claim 1 , wherein a surface of the seal member other than the end face is formed in a second color different from the first color. As mentioned above,
A repair member for an existing pipeline according to any one of claims 1 to 4 ;
Equipped with
The repair member is inserted into the straight cylindrical portion so that an outer peripheral surface of the cylindrical body is spaced from an inner peripheral surface of the straight cylindrical portion.

Images