JPS6215340Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a screw-type water control valve housing provided for operating a water control valve provided in a water pipe.

The conventional screw-type water control valve housing has an upper and a lower cylinder screwed together as shown in Fig. 3, a lid is attached to the upper surface of the upper cylinder, and the lower end of the lower cylinder is shaped like a flap. Usually, the valve case is configured to have an open valve housing protection part, and the height can be adjusted by adjusting the threading of the upper and lower cylinders. However, when installing the water control valve housing and compacting the surrounding buried earth, there is a risk that the entire water control valve housing will tilt if a road roller or the like hits it, so it is necessary to be very careful. As the roadbed sinks over time, the head of the water control valve housing rises above the road surface, and the water control valve housing sinks and creates a dent, so the outer periphery of the upper end of the cylindrical part is
Attempts have been made to stabilize the structure by installing a protruding ring-shaped tsuba like the one seen in Jitsugoku 50-39019 and filling the inside with concrete, etc., but a small hole was made in the bottom of the box-shaped ring-shaped tsuba. Even if the pavement is paved with asphalt, it is impossible to press the asphalt or other paving material on the underside of the brim with a roller, and the density is inevitably lower than that of other parts. Air bubbles may float to the surface and collect on the underside of the flange, creating a void, and the concrete may be damaged in the void due to impact from passing vehicles, etc., causing the upper part of the water control valve housing to shake or sink. Something happened. In addition, when repairing floating or sinking water control valve cases or raising the level of road pavement, the upper part of the water control valve case is rotated to adjust its height. It was necessary to dig down to at least the lower end of the upper part, and soil and sand often got caught in the threaded joint, making adjustment difficult.

The present invention was devised to eliminate such drawbacks, and will be explained in accordance with the embodiments shown in the drawings. The screw-type water control valve housing 1 according to the present invention is composed of an upper part 2, a lower part 3, and a lid 4 like the conventional product, but the upper part 2 has a funnel-like shape that expands toward the upper end. In addition, the length of the funnel-shaped expanded portion is at least half of the total length of the upper portion 2, and a cylindrical portion is provided below the lower end of the expanded portion, and the inner wall surface of the cylindrical portion is The threaded thread 5 is made to bulge in one to three turns (one lead to three leads) in a spiral manner. The outer wall surface of the cylindrical portion of the lower part 3 is also provided with a screw thread 6 in a spiral shape.
The screw threads 5 are raised over the entire length of the cylindrical part at the same pitch as the threads 5 which are raised on the inner cylindrical part. Further, the width of the groove formed by spirally protruding the threads 5 and 6 is made to be at least 1.5 times wider than the width of the threads. The upper part 2 is screwed together with the lower part 3 so as to be attached to the lower part 3. The lower end of the lower part 3 is opened in the shape of a flap, as is the case with conventional products, and the lid 4 provided at the upper end of the upper part 2 is not particularly limited, and in Figure 1, a larger lid than the conventional one is shown. but,
An annular collar may be provided inside the opening to make it compatible with conventional lids.

Since the screw-type water control valve housing according to the present invention is constructed as described above, before paving with asphalt, concrete, etc., it is necessary to use crushed stone, gravel, etc., to leave the upper surface of the water control valve housing as thick as the pavement. It is buried and hardened, but at that time rollers etc. may hit the water control valve housing, tilting the water control valve housing as a whole and damaging it. The upper part 2 has a length of one-half or more of the total length of the upper part 1, and as shown in the enlarged cross-sectional view of the threaded part in FIG. The lower part 3 is screwed in a state where it is supported by the thread 5 on the thread 6, and the upper part 2 can move up and down by the gap created above the thread 5, and the top part cannot swing. Therefore, even if the roller hits the upper part 2 of the water control valve housing, the effect on the lower part 3 is reduced accordingly, and damage is also reduced. In addition, asphalt and other paving materials can be compacted at the same density around the water control valve housing, so there is no fear that the asphalt will sink and the water control valve housing will protrude. Therefore, even if air bubbles hit the upper outer wall, they will rise along the wall and be released into the air, so there is no need to worry about creating voids on the wall surface. In addition, in the case of road raising work, the upper 2
Since it is funnel-shaped, it has the advantage that it is possible to easily rotate only the upper part and make it higher without having to excavate the surrounding area.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view showing the left half in cross section, FIG. 2 is a partially enlarged sectional view of the threaded part A in FIG. 1, and FIG. It is a side view showing the left half of the conventional product in cross section. 1...Screw type water control valve housing, 2...Upper part, 3...Lower part, 4...Lid, 5...Screw thread (upper part), 6...
Screw thread (lower part), A...screw joint.

Claims (1)

[Scope of utility model registration request] The upper part 2 has a lid 4 fitted into the upper opening, and the lower part 3 has a valve housing protection part opening in the shape of a flap at the lower end, and the upper part 2 and the lower part 3 are connected with a screw. In the valve housing 1, the upper part 2 has a funnel-like shape that expands toward the upper end, and the length of the funnel-shaped expanded part is one half or more of the total length of the upper part 2,
A screw thread 5 is spirally provided on the inner wall surface of a cylindrical portion provided below the lower end of the expanded portion, and is raised around one to three times;
On the outer wall surface of the cylindrical portion of the lower part 3, a threaded thread 6 is spirally provided over the entire length at the same pitch as the threaded thread 5 that is raised on the inner cylindrical part of the upper part 2, and a groove is formed by the threaded thread. The screw type water control valve housing is characterized in that the width of the casing is at least 1.5 times the width of the screw thread, and the upper part 2 is screwed together with the lower part 3 so as to be crowned.