JPH0227021Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a sewer system in which the inner peripheral surface of the pipe body through which sewage flows is covered with a lining material, and in particular, the present invention relates to a sewer system in which the inner peripheral surface of the pipe body through which sewage flows is covered with a lining material. The present invention relates to a sewage channel that can prevent damage to the pipe wall of the pipe body caused by gases such as hydrogen sulfide.

(Prior art) For example, in a sewer using a hump pipe,
Due to suspension of operation of relay pump stations, sewage may remain in the pipes for a long time. When sewage stagnates for a long time, corrosive gases such as hydrogen sulfide gas are generated, which can damage the concrete parts of the pipe walls. In particular, the upper part of the pipe wall, which does not come into contact with flowing sewage, is severely damaged by gas. For this reason, the inner peripheral surface of the pipe is coated with a lining material made of synthetic resin such as vinyl chloride resin. Even old and severely damaged concrete sewer pipes can be used for a long time by lining the inner peripheral surface with a synthetic resin sheet.

Conventionally, a synthetic resin lining material has been applied to the inner circumferential surface of a pipe in the following manner. First, on the entire outer peripheral surface (the surface in contact with concrete) of the inner formwork,
For example, a vinyl chloride sheet is pasted in advance, and concrete is poured between the formwork and the outer steel segment. Then, by removing only the inner formwork after the concrete has hardened, the vinyl chloride sheet is adhered to the inner peripheral surface of the sewer pipe. In this method, when assembling the inner formwork, the lining material must be attached to the inner formwork, which increases the number of work steps.
It takes time and effort. Furthermore, changes in pressure and temperature caused by pouring concrete may deteriorate or damage the synthetic resin lining material.
Since the lining material is in close contact with the concrete, if minute cracks occur in the steel segment or the concrete, cracks may also occur in the lining material. If groundwater infiltrates through cracks formed in the steel segments and concrete, the groundwater may accumulate between the lining material and the pipe wall, potentially damaging the lining material.

(Problems to be Solved by the Invention) The present invention is intended to solve the above-mentioned conventional problems, and its purpose is to make it easy to install a lining material, and to use the lining material to prevent gases such as hydrogen sulfide from being removed. To provide a sewage channel that can reliably protect the wall of a pipe body through which sewage flows. Another object of the present invention is to provide a sewage channel that can prevent damage to the lining material caused by groundwater seeping through cracks in the concrete layer of the pipe through which sewage flows.

(Means for Solving the Problems) The sewage channel of the present invention includes a pipe through which sewage flows; a plate-shaped main body disposed along the inner peripheral surface of the pipe; and an outer peripheral surface of the main body. a plurality of protrusions protruding in parallel to each other, the radial end surface of which abuts the inner circumferential surface of the tube, and divides the gap between the inner circumferential surface and the main body into grooves along the circumferential direction; and a lining material made of synthetic resin having a section, and a communication port is formed that communicates the gap with the flowing water region of the pipe body, thereby achieving the above object.

(Example) Examples of the present invention will be described below.

As shown in FIG. 1, the sewer of the present invention has a pipe body 20 and a lining material 10. Pipe body 20
An outer layer 21 of steel segments is formed around the outer periphery of an inner layer 22 made of concrete. Sewage flows through the pipe body 20. A plurality of lining materials 10, 10, . . . are arranged in parallel on the inner peripheral surface of the tube body 20 in the tube axis direction.

Each lining material 10 has a plate-shaped main body 11 and a plurality of protrusions 12, as shown in FIGS. 2 and 3.

The main body portion 11 includes a water pipe along the inner circumferential surface of the sewer pipe 20 excluding the flowing water area (downward inside the sewer pipe) 200.
It is attached so as to have a predetermined gap (corresponding to the height of the protrusion 12) with the inner peripheral surface.

The protrusions 12, 12, ... are formed on the outer peripheral surface of the main body 11, that is, on the surface facing the inner peripheral surface of the inner layer 22 of the tube body 20, with adjacent ones spaced apart from each other by a predetermined distance in the tube axis direction. It protrudes parallel to the direction. Each protrusion 12 has a T-shaped cross section, and its radial tip surface contacts the inner circumferential surface of the inner layer 22 of the tube body 20. As a result, the protruding portion 12 divides the gap between the inner circumferential surface of the tubular body 20 and the main body portion 11 into grooves along the circumferential direction.

Each circumferential end surface of the main body portion 11 and the protruding portion 1
Each end face in the circumferential direction of 2 is located further below the lowest water level of the sewage flowing through the pipe body 20, respectively. The protrusion gap located on the circumferential end surface of the main body 11 and the inner circumferential surface of the tube 20 are defined by the main body 1
Communication ports 15, 15 are formed to communicate the gap between the inner peripheral surface of the pipe body 1 and the pipe body 20 and the flowing water region within the pipe body.

A linear engagement protrusion 1 parallel to the protrusion 12 is provided on one side of the outer peripheral surface of the main body 11 in the tube axis direction.
3 protrudes in the circumferential direction, and an engagement recess 14 having the same cross-sectional shape as the engagement protrusion 13 is formed on the other side of the main body 11 . The lining materials 10 are continuously arranged in parallel in the tube axis direction of the tube body 20, but adjacent lining materials 10, 1
0 are overlapped, and the two are closely engaged by fitting the engagement protrusion 13 on one lining material into the engagement recess 14 on the other lining material.

The lining material 10 is made of vinyl chloride resin, for example.
As shown in FIG. 4, it is integrally molded from a flexible synthetic resin such as polyolefin resin. Normally, the length of the main body part 11 in the tube axis direction is about 5 to 30 cm, but when attaching it to the inner peripheral surface of the tube body 20, each side of several sheets of lining material is overlapped to form the engaging protrusion 13. By engaging the engagement recess 14 with the engagement recess 14, the length in the tube axis direction is about 1 to 2 m.
Such a lining material is wound so that the protruding part 12 is on the outer circumferential side, and is carried into the tube body 20, and the radial end surface of the protruding part 12 is brought into contact with the inner circumferential surface of the tube body 20. , several anchor bolts 23 are driven into the tube wall of the tube body 20 from the inner peripheral surface of the main body 11 at appropriate intervals, and a nut 2 is attached to each anchor bolt 23.
It is fixed by screwing 4 together.

Anchor bolt 2 for fixing lining material 10
3 and the nut 24 are made of a material with excellent acid resistance and alkali resistance, such as stainless steel with a chromium content of 20% or more, polyphenylene sulfide, or the like.

In a sewer waterway with such a configuration, each lining material 1
0 coats the inner peripheral surface of the tube body 20, it is possible to reliably prevent damage to the tube wall caused by hydrogen sulfide gas or the like generated from sewage flowing through the tube. In addition, groundwater or the like that permeates through cracks formed in the pipe wall is guided by each protrusion 12 through the gap between the main body 11 of the lining material 10 and the inner peripheral surface of the pipe body 20, and is guided through the respective communication ports 15, 15 and flows down to the flowing water in the pipe.

In the above embodiment, the cross-sectional shape of the protrusion 12 is T.
Although the configuration has been described as a character shape, the configuration is not limited to this, and it may be configured to have a rectangular shape, a trapezoid shape, a square shape, an inverted trapezoid shape, etc., for example.

The communication ports 15, 15 are not limited to the above configuration, but for example, as shown in FIG. A plurality of through holes communicating with the gaps between the protrusions may be provided in the main body 11 located below the water level to serve as communication ports 15, 15, . . . .

In addition, the engaging protrusion 13 and the engaging recess 14 are provided on each side of the main body 11 in the axial direction, and the configuration is such that adjacent lining materials are connected to each other, but the present invention is not limited to such a configuration. First, the side parts of adjacent lining materials may be arranged side by side without overlapping and joined by a suitable joining member. This joining member is preferably made of vinyl chloride resin, for example, and can be held between each main body portion 11 and cover the inner circumferential surface of each side portion. In this case, in order to securely sandwich the joining member, a spacer made of, for example, butyl rubber may be interposed between the joining member and each lining material.

(Effects of the invention) In this way, the sewage channel of the present invention can guide underground water seeping through cracks, etc. in the pipe wall of the sewage pipe to the sewage flowing through the pipe body using the lining material. There is no risk that water will accumulate between the tube and the circumferential surface of the tube, and therefore there is no risk of damage due to the accumulated water. The construction of the lining material is
For example, when pouring concrete for a pipe body on-site, it is not necessary to do so at the same time as pouring concrete, improving work efficiency. Since the main body of the lining material is not bonded to the pipe wall, there is no risk of cracks occurring in the lining material due to cracks occurring in the pipe wall. Moreover, if the lining material is used for an aged pipe body, there is no fear that the pipe body will be damaged due to water leakage, and the pipe body can be used for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a sewer channel of the present invention;
Figure 2 is its cross-sectional view, Figure 3 is the − of Figure 2.
4 is a perspective view of the lining material of the present invention, and FIG. 5 is a perspective view of a sewer channel in another embodiment of the present invention. 10... Lining material, 11... Main body, 12
...Protrusion, 13...Engagement protrusion, 14...Engagement recess, 20...Pipe body.

Claims (1)

[Claims for Utility Model Registration] 1. A pipe through which sewage flows; a plate-shaped main body disposed along the inner peripheral surface of the pipe; and a plate-shaped main body disposed along the inner circumferential surface of the pipe; Made of synthetic resin, the tube has a plurality of protrusions whose radial tip surfaces abut against the inner circumferential surface of the tube and divide the gap between the inner circumferential surface and the main body into grooves along the circumferential direction. A sewage channel, comprising: a lining material; and a communication port communicating between the gap and a flowing water region of the pipe body. 2. The sewer waterway according to claim 1, wherein the communication port is constituted by the protrusion gap located on the circumferential end surface of the main body of the lining material and the inner circumferential surface of the tube. 3. The sewage channel according to claim 1, wherein the communication port is formed by a through hole that is provided in the main body of the lining material and communicates with the protrusion gap. 4. The sewer waterway according to claim 1, wherein the lining materials are arranged in parallel in the axial direction of the pipe body. 5. One side of the main body of the lining material in the tube axis direction has an engaging protrusion for joining another lining material arranged in parallel, and the other side has an engaging protrusion for joining another lining material arranged in parallel.
A sewage channel according to claim 4, which has an engaging recess for a similar purpose.