JPH0128108Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a water absorption channel for underdrain drainage buried in agricultural land or the like where the groundwater level is high.

[Conventional technology]

Conventionally, the above-mentioned water absorption culvert is constructed by laying ceramic pipes with their end faces abutting each other in a trench excavated in agricultural land with a high groundwater level, and then backfilling the water to form a water absorption culvert. absorbs groundwater from
It is known that water is sent to drainage canals.

[Problem that the invention attempts to solve]

In the above-mentioned conventional water absorption channel, the entire area of both end faces of the ceramic pipes that are butted together forms a simple plane perpendicular to the pipe axis, and these planes are only butted against each other, and the bottom of the groove is completely flat. Because it takes time to lay the pipes in a certain degree of undulation, it is customary to lay them in a certain degree of undulation. Therefore, during backfilling or after construction, due to tread pressure from tractors, freezing of the soil, uneven settlement, etc., the end faces of the ceramic pipes that meet each other may shift vertically or horizontally, or may become too far apart from each other front and back, resulting in the inflow of earth and sand. However, there was a drawback that drainage was likely to become impossible.

The present invention aims to provide a water absorption channel that eliminates the above-mentioned conventional drawbacks.

[Means for solving problems]

In this invention, a plurality of ceramic tubes are arranged in series, each of which has alternating engagement protrusions and engagement recesses on both open ends of the tube body, and the engagement protrusions and engagement recesses of adjacent ceramic tubes are engaged with each other. , and a wire is wrapped around the engaged convex portion and concave portion to tighten and connect them.

[Effect]

In this invention, the meshing protrusions and meshing recesses of adjacent ceramic pipes mesh with each other, and the area around these meshing projections and meshing recesses is tightened with a wire rod, so that the connected end surfaces of each ceramic pipe can be unprepared. It does not shift up and down, left and right, or front and back.

In addition, since the engaging convex portion and the engaging concave portion engage as described above, the groundwater on both abutted end faces is absorbed more than the conventional case where the entire end face is a simple plane perpendicular to the pipe axis. The gap becomes longer.

〔Example〕

First, the first embodiment shown in FIGS. 1 and 2 will be described below.

Ceramic tubes A ₁ and A ₂ in Fig. 1 each have an unglazed tube body with a circular cross section and a circumferential wall of a required length, and both opening ends are divided into four equal parts, and each of these parts is alternately divided into meshing protrusions 1 and 1.
and the meshing recess 2. The outer end surfaces 4, 4 of the engaging protrusions 1, 1 and the inner bottom surfaces 5, 5 of the engaging recesses 2, 2 are formed over the inner periphery and outer periphery of the peripheral wall, respectively,
and are located on mutually parallel planes perpendicular to the tube axis.

The boundary surface 6 between the engaging convex portion 1 and the engaging concave portion 2 is formed across the inner and outer peripheries of the peripheral wall, and is located on each diameter line dividing the opening end into four equal parts. The meshing convex portions 1, 1 on the opening end of the one side (on the right side of the figure) and the meshing recesses 2, 2 on the other side (on the right side of the figure),
The engaging concave portions 2, 2 at one open end correspond to the engaging convex portions 1, 1 at the other open end.

Therefore, as shown in Figure 1, the ceramic tubes A ₁ and A ₂ are
Connection can be made by engaging the engaging protrusion 1 and the engaging recess 2 at the opening ends of both, for example, by inserting the ceramic pipe A ₁ ,
Engagement convex part 1 and engagement concave part 2 where A ₂ is laid and engaged
The iron wire 3, which is a wire material, is wrapped around both parts and tightened.
Below, in the same manner, water absorption channel B ₁ is constructed by connecting and laying the required number of ceramic pipes in series.

The water absorption channel B ₁ constructed in this way has a total of 8 meshing protrusions 1 and 8 meshing recesses 2 of the adjacent ceramic pipes A ₁ , A _{2 ,} etc. connected in series, and 8 interfaces 6 . are joined in a tapered shape on the diameter line that divides the open end into four equal parts, so there is no risk of it shifting in any direction such as vertically or horizontally in a plane perpendicular to the tube axis. Since it is tightened, there is no risk of it shifting in the front-rear direction (in the direction of the pipe axis), and the two open ends may be inadvertently engaged when backfilling the trench 7, or due to tread pressure from a tractor, freezing of the soil, uneven settlement, etc. It never shifts.

Groundwater flows in and is absorbed through the gap between the engaging convex portion 1 and the engaging concave portion 2, but this gap is larger than that in the conventional case where the entire opening end surface is simply butted against a simple plane that is orthogonal to the pipe axis. Even if the pipe diameter is the same, the gap becomes longer because the boundary surfaces 6 are joined to each other, so the water absorption efficiency increases accordingly.

Next, a second embodiment shown in FIGS. 3 and 4 will be described.

Ceramic tubes A ₃ and A ₄ used in this second embodiment
, both opening ends are divided into eight equal parts, and each of these parts is made into an engaging convex part ₁ ' and an engaging concave part ₂ ' in the same manner as in the case of the above-mentioned ceramic tubes A 1 and A 2 , and the parts 1', Although the number of pieces 2' is different from that of ceramic tubes A ₁ and A ₂ , the other configurations are the same.

As shown in Figure 3, the ceramic tubes A ₃ and A ₄ can be connected by engaging the engaging protrusion 1' and the engaging recess 2' at their open ends, and the iron wire 3 is attached to the engaged part. Then connect the required number of ceramic pipes in series in the same manner and install them in trench 8 (Fig. 4) excavated at the required position on the farmland to construct water absorption culvert _B2 .

The water absorption culvert B ₂ constructed in this way has the length of the gap between the interfaces 6' of the connected ceramic pipes A ₃ , A ₄ , etc. as those of the ceramic pipes A ₁ and A ₂ . Since the water absorption efficiency is twice as high as that of the pipe diameter, the water absorption efficiency is increased by that amount even with the same pipe diameter.

In addition, in the above embodiment, the case where both opening ends are divided into four equal parts or eight equal parts was explained, but the invention is not limited to this, and it may be divided into an appropriate even number of equal parts such as six equal parts or 12 equal parts or more. .

[Effect of idea]

As is clear from the above, according to the present invention, an even number of meshing protrusions and an even number of meshing recesses formed at the open ends of both connected ceramic tubes mesh with each other. In addition to the boundary surfaces of the engaging convex part and the engaging concave part joining in a tapered shape on the diameter line that equally divides the opening end (an even number of 4 or more), a wire rod is wrapped around the engaging part and tightened. Therefore, it does not shift vertically, horizontally, etc. in the plane perpendicular to the pipe axis, and it also does not shift in the front-back direction (pipe axis direction), so it does not shift when backfilling trenches, treading pressure from tractors, etc. There is no risk of the mated opening ends shifting or becoming too far apart due to freezing, uneven settlement, etc., allowing for a secure connection, and also preventing earth and sand from flowing in if the ends of the connected ceramic pipes shift or become too far apart. It is highly durable and does not become impossible to drain.

In addition, groundwater flows in and is absorbed from the gap between the interfaces of the meshing protrusion and the meshing recess, so when simply butting together a simple plane in which the entire opening end face is perpendicular to the pipe axis, Compared to this, even if the pipe diameter is the same, the gap is longer due to the bonded interface, so the water absorption efficiency is increased accordingly.

[Brief explanation of drawings]

Drawings 1 and 2 show the first embodiment of the present invention,
FIG. 1 is a side view of the ceramic pipe with some parts omitted, and FIG. 2 is a front view of the ceramic pipe installed in a groove.
Figures 3 and 4 show a second embodiment of the present invention, with Figure 3 being a side view with a portion of the ceramic tube omitted, and Figure 4 being a side view of the ceramic tube.
The figure is a front view showing the state in which it is installed in a groove. 1, 1'...Matching convex part, 2, 2'...Matching concave part, 4...
Outer end surface, 5...inner bottom surface, 6, 6'...boundary surface, A ₁ to _{A 4}
...Ceramic pipe, 3...Iron wire.

Claims (1)

[Scope of utility model registration request] Both opening ends of a tubular body having a circular cross section and having a peripheral wall of a required length are each divided equally into an even number of 4 or more, and each of these equally divided parts is alternately formed into a mating convex part and a mating concave part, and the above-mentioned The outer end surface of the engaging convex portion and the inner bottom surface of the engaging concave portion are located on mutually parallel planes that span the inner and outer peripheries of the peripheral wall and are perpendicular to the tube axis, and the interface between the engaging convex portion and the engaging concave portion is A plurality of ceramic tubes are arranged in series, extending over the inner and outer peripheries of the peripheral wall and located on each diameter line that equally divides the open ends, so that the open ends of adjacent ceramic tubes correspond to each other. A water absorption culvert for underdrain drainage, characterized in that an engaging protrusion and an engaging recess are engaged, and a wire is wrapped and tightened around the engaged engaging protrusion and the engaged recess.