JPH0310203Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to the structure of a joint between a manhole and a hump pipe.

<Problems that this idea aims to solve> It is said that the amount of sewage flowing into sewage treatment plants is 20% to 30% more than the amount calculated for the population. For this reason, final treatment plants are forced to increase their equipment, creating a major problem in which the public budget is significantly exceeded.

In other words, it is due to uncalculated water leakage or inflow water, and prevention is an urgent need, and related industries are being asked to investigate the cause and take remedial measures. There is a problem that external water flows in from the joint between the manhole and the hump pipe.

A rubber ring is attached to the fume pipe that is inserted into the side hole of the manhole to give it flexibility and water-stopping properties, but the rubber ring does not fit the shape of the manhole, which means that the manhole is mostly It is cylindrical, whereas a rubber ring is planar. There is a gap between the side hole of the manhole and the rubber ring attached to the humid pipe, and this gap is filled with mortar to seal it, but such work is difficult due to the narrow space, and the finished appearance is not sealed. Even if it looks like this, it is still not possible to confirm whether the internal sealing density is sufficient.

Therefore, due to external impacts, etc., the mortar may crack or fall off due to ground subsidence or earth pressure, resulting in water leakage and inflow of external water. The present invention attempts to solve such problems.

<Structure of the invention> When fitting and connecting a hume pipe into a side hole of a manhole, a rubber ring to be fitted into the hume pipe is molded into a three-dimensional arcuate shape in plan view to match the curved shape of the side hole, and the rubber ring is A concave ring part is provided on the outer surface of the intermediate part, and after press-fitting into the side hole, caulking material is injected and filled from the inside of the concave ring part to surely eliminate the gap between the side hole and the rubber ring. It is in.

<Example> Examples will be described below based on the drawings.

A hume pipe 4 fitted with a rubber ring 3 is inserted into a side hole 2 of a cylindrical manhole 1. The rubber ring 3 is integrally molded into a three-dimensional arcuate shape in plan view along the cylindrical shape of the manhole using a press machine, and a concave ring part 5 is provided in the middle of the outer surface as shown in FIGS. The fins 6a and 6b for tilting are provided symmetrically, and a weir plate 7 is provided in the middle of the upper part of the concave ring part 5, and a flow path 8 that reaches the concave ring part 5 from the inner surface 3a on both sides of the weir plate 7 is provided.
a and 8b are provided.

When the hume pipe 4 is inserted into the side hole 2 of the manhole 1, the fins 6a and 6b inserted into the hume pipe 4
is tilted and press-fitted into the inner surface of the side hole 2, and then the gun part connected to the caulking material injection tube from the inside of the manhole 1 is inserted into one flow path 8a.
Then, caulking material 9 is injected into the concave ring portion 5. Due to the presence of the weir plate 7, the caulking material 9 flows downward, discharging the internal air from the other channel 8b, flowing towards the same channel 8b, and eventually stopping the injection at the point where it flows out from the channel 8b. . In this way, the inside of the concave ring part 5 is filled with the caulking material 9, completely filling the gap between the rubber ring 3 and the horizontal hole 2, and leaving no gap at all.

The caulking material 9 used includes, for example, molecules that adhere to both rubber and concrete, an expandable material whose volume does not decrease even after hardening, and molecules that impart elasticity.

In Fig. 5, a weir plate 7 is provided not only at the upper part of the concave ring part 5 but also at the center of the lower part, and flow passages 8a and 8b are also provided in the lower part, so that the inside of the concave ring part 5 divided into two by the upper and lower weir plates 7 is provided. An example is shown in which the caulking material 9 is injected from the upper flow path to the lower flow path.

In the embodiment, 6a and 6b are left-right symmetrical, but there is no deviation from the present invention even if they are left-right asymmetrical depending on the intended use.

<Effects of the invention> With the above configuration, the rubber ring 3 three-dimensionally formed in the shape of the manhole pipe wall is press-fitted between the side hole of the manhole and the hump pipe fitted therein, and the outer middle of the rubber ring 3 is inserted. By injecting and filling the caulking material into the concave ring provided in the joint, the work is facilitated, and a joint with no gaps is formed, which prevents external water from flowing in.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional front view showing the joint between a manhole and a hump pipe, Figure 2 is an enlarged cross-sectional plan view of the same, and Figure 3
The figure is a vertical side view seen from the hump pipe side, Figure 4 is a cross-sectional view of the upper part of the rubber ring, Figure 5 is a front view of another example of the rubber ring, Figure 6 is a cross-sectional view of the same, and 1 is a cylindrical manhole. , 2 is a horizontal hole, 3 is a rubber ring, 4 is a hump tube,
5 is a concave ring, 6a and 6b are fins for tilting, 7 is a weir plate, 8a and 8b are channels, and 9 is a caulking material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A concave ring is provided in the middle between the side hole of the manhole and the hump pipe inserted into the side hole, and rubber rings with tilting fins are press-fitted on both sides of the ring. A joint structure for a manhole and a fume pipe, characterized in that a caulking material is injected and filled into the concave portion of the rubber ring. (2) The structure according to claim 1 of the utility model registration, characterized in that the rubber ring is three-dimensionally molded into a curved shape or the like to match the shape of the side hole of the manhole. (3) Utility model registration claims 1 to 2, characterized in that the caulking material has adhesive properties to concrete and rubber, cures without shrinkage, and maintains elasticity even after curing. Structure described.