JPH0139835Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a water lock for underdrain drainage that is excellent in stability, watertightness, etc.

In conventional culvert drainage construction, water locks as shown in FIG. 1 or 2 are generally used frequently. The water lock shown in Fig. 1 has a pair of left and right horizontal cylinders 12a, 1 for connecting drain pipes on both sides of a vertical cylinder 11a.
3a, and a substantially elliptical ring-shaped seal seat 14 formed at an angle inside the main body 1a.
a, a rising circular pipe 2a connected and fixed to the upper part of the vertical cylinder 11a of the main body 1a, a shaft 3a inserted into the rising circular pipe 2a, and a shaft 3a mounted and fixed diagonally to the lower end of the shaft 3a via a fitting 31a. The shaft fixing means 5a is provided on the upper part of the rising circular pipe 2a.When the packing 4a is brought into close contact with the packing seat 14a as shown in the figure, the space between the horizontal cylinders 12a and 13a is fixed. When the seal 4a is pulled up from the seal seat 14a by the shaft 3a, both horizontal cylinders 12a and 13a communicate with each other, thereby allowing drainage to take place.

However, in such water locks, Patsukin 4
a and the lock seat 14a are inclined at about 45 degrees and are not provided at right angles to the shaft 3a, so when pushing down the shaft 3a to close the lock, the shaft 3
If a was twisted, the seal 4a would rotate and would no longer come into close contact with the seal seat 14a. Therefore, when closing the water lock, it is necessary to check each time whether the seal 4a faces the proper direction and is in close contact with the seal seat 14a, which is troublesome. On the other hand, the water lock shown in FIG. 2A is formed by making the bottom part 111b of the vertical cylinder 11b of the main body 1b project downward from the left and right horizontal cylinders 12b, 13b, and has a stopper 4 having a circular cross section.
b is attached to the lower end of the shaft 3b, and the stopper 4b is fitted up to the bottom 111b of the vertical cylinder 11b.The other construction is the same as that of the water lock shown in FIG. In such a water lock, since the stopper 4b has a circular cross section, even when the stopper 4a rotates when the lock is closed, it comes into close contact with the inner surface of the vertical cylinder 11b, blocking the space between the horizontal cylinders 12b and 13b, and draining water. However, on the other hand, it has the following drawbacks.

One of the problems is that the bottom part 111b of the vertical cylinder 11b protrudes below both horizontal cylinders 12b and 13b, making it difficult to place the vertical cylinder 11b during piping construction. Another drawback is that this bottom part 111b
When mud tends to accumulate and the bottom 111b becomes filled with mud, it becomes difficult to fit the plug 4b into the bottom 111b, resulting in a decrease in watertightness and the inability to satisfactorily prevent drainage. Yet another drawback is that since both horizontal cylinders 12b and 13b are provided at the same height,
If b and 13b are made thicker so that the inner diameter approaches the inner diameter of the vertical cylinder 11b, the inner shape of the vertical cylinder 11b that comes into close contact with the plug body 4b becomes greatly constricted in the center as shown by diagonal lines in FIG. ,,Since watertightness is maintained at the constricted portion of the minimum width w, the watertightness is further reduced. Therefore,
In this water lock, the horizontal cylinder 1 is larger than the vertical cylinder 11b.
It was necessary to make 2b and 13b considerably thinner.

The present invention was made with the aim of eliminating all the drawbacks of the conventional water locks mentioned above, and will be described in detail below with reference to examples.

FIG. 3 is a cross-sectional view of one embodiment of the water lock of the present invention, and this water lock consists of a pair of left and right horizontal cylinders at the bottom of a vertical cylinder 11 with a bottom, each having an internal diameter equal to or smaller than the internal diameter of the vertical cylinder 11. The cylinders 12 and 13 are arranged in series with a slight difference in height, and the lower part 121 of the cylinder wall of the lower horizontal cylinder 12 is the bottom wall 1 of the vertical cylinder 11.
The main body 1 is configured to have the same height as the main body 11. This main body 1 has left and right horizontal cylinders 12 and 13.
Sockets 122 and 123 are provided at the tip of the vertical cylinder 11 to connect a drain pipe, and a socket 112 is also provided at the top of the vertical cylinder 11 to connect and fix the rising circular pipe 2. The inner surface of the lower part of the vertical cylinder 11 is tapered as will be described later, and a stopper 114 for the stopper 4 is provided on the upper surface of the bottom wall 111. In such a main body 1, the bottom of the vertical cylinder 11 does not protrude downward like the main body of the conventional water lock shown in FIG.
Since the difference in height between the cylinders 13 and 13 is small, it has good stability.In this embodiment, legs 133 are provided on the socket portion 132 of the higher horizontal cylinder 13 in order to further improve the stability.

A pipe-shaped shaft 3 having a water inlet 31 is inserted into the rising circular pipe 2 so as to be movable up and down.
The shaft can be fixed at a desired height by shaft fixing means 5 provided on the upper part of the rising circular pipe 2. . This shaft fixing means 5 consists of a collect chuck 52 provided on the lid 51 of the rising pipe 2, and a tightening nut 53 that is screwed into the chuck 52. When the tightening nut 53 is tightened, the collect chuck 52 tightens and the shaft is tightened. 3 can be strongly held and fixed from the surroundings.

A plug body 4 is fitted onto the lower part of the shaft 3 and is clamped and fixed from above and below by fixing members 32 and 33. This plug body 4 has a donut-shaped cross section, and its outer peripheral surface is tapered so that the outer diameter becomes smaller toward the lower end. By moving the shaft 3 up and down, the plug 4 can slide vertically within the vertical cylinder 11 of the main body 1, and the lower end of the plug 4 is connected to the higher horizontal cylinder 13 of the main body 1. lower part of the cylinder wall 13
1 and the bottom wall 111 of the vertical cylinder 11
3, the plug body 4 comes into close contact with the inner surface of the lower part of the vertical cylinder 11, which has a taper corresponding to the taper of the plug body 4, and both horizontal cylinders 12, 1
It is designed to block the gap between 3 and 3. In addition, plug body 4
A gap corresponding to at least the height of the stopper 114 exists between the vertical cylinder 11 and the bottom wall 111 of the vertical cylinder 11.

The water lock of the present invention constructed as described above connects the upstream drain pipe to the socket 132 of the higher horizontal cylinder 13 of the main body 1, and connects the lower horizontal cylinder 1 to the socket 132 of the main body 1.
Connect the downstream drain pipe to the socket 122 of No. 2,
The rising circular pipe 2 is buried underground with the upper part protruding from the ground surface. In this case, in the main body 1 of the water lock of the present invention, the bottom of the vertical cylinder does not protrude downward like the conventional water lock shown in FIG.
Since the difference in height is small, it has good stability and can be easily buried. In particular, the socket 132 of the higher horizontal cylinder 13 as in the embodiment
If a leg piece 133 is provided on the holder, the installation property will be further improved.

The opening and closing operations of the water lock of the present invention buried in this manner are performed as follows. When opening a water lock,
Loosen the tightening nut 53 of the shaft fixing means 5, pull up the shaft 3, and slide the plug body 4 upward so that the lower end of the plug body 4 is located above the lower part 131 of the cylinder wall of the higher horizontal cylinder 13. This allows both horizontal cylinders 12 and 13 to communicate with each other. Conversely, when closing the water lock, push down the shaft 3 and slide the stopper 4 downward until the lower end of the stopper 4 overlaps with the stepped portion 113, bringing the stopper 4 into close contact with the inner surface of the lower part of the vertical cylinder 11. , tighten the tightening nut of the shaft fixing means 5 to fix it. In this case, the inner surface of the lower part of the vertical cylinder 11 that is in close contact with the plug body 4 is constricted at the center as shown in FIG. Since they are installed at different heights, the constricted minimum width l is compared to the minimum width w of the conventional water lock shown in Figure 2 (b).
Due to the difference in height, the width becomes wider and the watertightness improves. Therefore, the water lock of the present invention has good watertightness even when the inner diameters of both the horizontal cylinders 12 and 13 and the inner diameter of the vertical cylinder 11 are the same. To give an example, the inner diameter of the vertical cylinder 11 is 82 mm, and the inner diameter of the horizontal cylinder 1 is 82 mm.
When the inner diameter of 2 and 13 is expanded to 82 mm, horizontal cylinder 1
If there is no height difference between 2 and 13, w will be 0m/m,
Although water leakage occurs, if the height of the stepped portion 113 is set to 20 mm, a watertight area of approximately 14 m/m is obtained, greatly improving watertightness. It goes without saying that if the vertical cylinder 11 is larger than the horizontal cylinders 12 and 13, watertightness will be more certain.

In addition, in the water lock of the present invention, the lower part of the cylinder wall 121 of the lower horizontal cylinder 12 of the main body 1 is at the same height as the bottom wall 111 of the vertical cylinder 11, so that the water is washed away by the force of the drainage and the bottom wall 111 Therefore, the stopper 4 can be pushed in until it comes into contact with the stopper 114 on the bottom 111 of the vertical cylinder 11, so that the stopper 4 can be pushed in until it touches the stopper 114 on the bottom 111 of the vertical cylinder 11. There is no disadvantage of reduced watertightness.

Furthermore, if a vertical groove 151 is provided on the upper outer circumferential surface of the stopper 4 as shown in FIGS. Water flows into the vertical cylinder 11 through the gap between the horizontal cylinder 13 and the upper part 134 of the cylinder wall, and further flows through the shaft 3 through the water inlet 31 of the shaft 3 and flows out into the other horizontal cylinder 12. Mizuguchi 3
It is maintained at a height of 1. Therefore, by changing the position of the water inlet 31 of the shaft 3, the water level can also be adjusted.

In addition, in the water lock of the present invention, since the stopper 4 has a donut-shaped cross section with no directionality, even if the stopper 4 is rotated by twisting the shaft 3, it will not fit tightly against the inner surface of the lower part of the vertical cylinder 11. Therefore, it goes without saying that rotating the seal 4a as in the case of the conventional water lock shown in FIG. 1 does not have the drawback of poor adhesion and reduced watertightness.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an example of a conventional water lock, Fig. 2A is a partial sectional view showing another example of a conventional water lock,
Figure 2B is an explanatory diagram showing the inner surface shape of a vertical cylinder with which the plug of the conventional water lock is in close contact, Figure 3 is a sectional view of an embodiment of the water lock of the present invention, and Figure 4 shows the plug of the same embodiment. An explanatory diagram showing the inner shape of vertical cylinders that are in close contact with each other. FIG. 5A is a cross-sectional view of the water lock of the present invention provided with a stopper whose water level can be adjusted, and FIG. 5B is a perspective view showing the stopper of FIG. Explanation of main symbols in the drawings, 1...Main body, 11...
Vertical cylinder, 12, 13...Horizontal cylinder, 111...
Bottom wall, 2... rising circular pipe, 3... shaft, 4...
...Plug body, 5...Shaft fixing means.

Claims (1)

[Scope of utility model registration request] At the bottom of the bottomed vertical cylinder 11, a pair of left and right horizontal cylinders 12 and 13 having an inner diameter equal to or smaller than that of the vertical cylinder 11 are arranged in series with a slight difference in height, and the lower horizontal cylinder is A main body 1 configured such that the lower part 121 of the cylinder wall of the vertical cylinder 12 is at the same height as the bottom wall 111 of the vertical cylinder 11;
A rising circular pipe 2 connected and fixed to the top of the vertical cylinder 11 of
A vertically movable shaft 3 inserted into the rising circular pipe 2, a stopper 4 fixed to the lower part of the shaft 3 and in close contact with the inner surface of the lower part of the vertical cylinder 11 of the main body 1, and a vertically movable shaft 3 inserted into the rising circular pipe 2; A water lock consisting of a shaft fixing means 5 provided at the top.