JPH0328217Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is applicable to underground valves that are buried below the ground surface to open and close pipes buried underground for city gas supply, for example, in order to operate them from the ground. This relates to a valve box.

[Prior art]

The conventionally commonly used valve box has an annular side wall made of concrete, etc. installed below the ground surface, a bottom wall made of stone, etc., and a steel etc. that closes the upper opening. A sheath tube for passing an operating tool for operating the underground valve projects into the valve box from the center of the bottom wall. The upper end of the sheath tube is normally sealed and closed by an inner lid.

When operating an underground valve, first open the upper cover of the valve box, then open the middle cover at the upper end of the sheath pipe, pass the operating tool for operating the underground valve through the sheath pipe, and insert the lower end of the valve box into the valve box. The valve is engaged with the actuating part of the valve, thereby operating the underground valve. In this way, underground valves can be operated from above ground.

As mentioned above, underground valve valve boxes are
It is always closed by a top cover, and by keeping this top cover flush with the ground surface, it does not cause any obstruction to the ground, such as traffic obstruction, and also prevents underground valves from being closed. When the need for opening/closing operations arises, the upper cover can be opened and the underground valve can be operated from the ground surface.

[Problem that the invention attempts to solve]

As mentioned above, this type of valve box is installed so that the top cover is flush with the ground surface, so when it is necessary to open and close the valve during rain, when the top cover is opened, the rain water flowing on the ground can be removed. rainwater flows into the valve box and obstructs the operation of the valve, and when the inner cover that closes the upper part of the sheath tube for inserting the operating tool is opened to operate the valve, rainwater reaches the underground valve. This will have an adverse effect on the valve.

[Purpose of invention]

The present invention solves the above-mentioned problems with conventional valve boxes for underground valves, and prevents rainwater inflow from above-ground water from flowing into the valve box even when it is raining when the valve is operated during rain. It is intended to provide a prevention member.

[Structure of the invention] The rainwater inflow prevention member according to the invention to achieve the above object is buried under the ground surface in order to operate the underground valve from the ground, and is always closed by a top cover. In order to prevent rainwater from flowing into the valve box when the valve box is opened, a cylindrical body that engages water-tightly with the ground surface around the opening of the valve box and rises above the opening. It is characterized by:

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of the valve box will be explained with reference to FIG. In FIG. 3, 1 is the ground surface and 2 is the valve box. The valve box 2 has an annular side wall 3 made of concrete, a bottom wall 4 made of gristite, and an upper lid 5 made of iron that always closes the upper opening. A sheath tube 6 into which an operating tool for operating an underground valve (not shown) is inserted projects into the valve box from the center of the bottom wall, and its upper end is always hermetically closed by an inner lid 7.

When opening/closing an underground valve, first open the upper cover 5, then remove the inner cover 7, pass the valve operating tool into the sheath pipe 6, and engage the lower end of the valve operating part with the operating part of the valve. , operate the valve using the operating tool.

Figure 1 is a cross-sectional view showing the rainwater inflow prevention member according to the present invention installed on a valve box;
The figure is a perspective view showing an embodiment of the rainwater inflow prevention member of the present invention. The rainwater inflow prevention member 8 shown in the figure is attached to the ground surface 1 around the opening of the valve box when the lid is opened.
It consists of a cylindrical body 9 that engages with the upper part in a watertight manner and stands up above the opening, and a sealing material 10 is attached to the lower side of the cylindrical body 9, which is in close contact with the ground surface 1.

When operating the valve, first the rainwater inflow prevention member 8 is brought into close contact with the ground surface 1 around the opening of the valve box 3, the top cover 5 is removed, and then the inner cover 7 is removed.
Pass the valve operating tool 11 through the rainwater inflow prevention member and insert it into the sheath pipe 6.
The valve is inserted into the valve, and its lower end is engaged with the operation part of an underground valve (not shown) to open and close the valve.
In this way, if the rainwater inflow prevention member according to the present invention is installed when operating the valve, running water will be prevented from flowing into the valve box even during rainfall, and underground valves can be operated safely. I can do it.

[Effect of idea]

As can be seen from the above description, according to the present invention, underground valves can be operated safely even during rainy weather.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing a rainwater inflow prevention member according to the present invention installed on the ground surface around a valve box, FIG. 2 is a perspective view showing an embodiment of the rainwater inflow prevention member of the present invention, and FIG. FIG. 3 is a sectional view showing the valve box before installation of the rainwater inflow prevention member. 1...Ground surface, 2...Valve box, 3...
Side wall, 4...Bottom wall, 5...Top wall, 6...Sheath pipe, 7
... Inner lid, 8 ... Rainwater inflow prevention member, 9 ... Cylindrical body, 10 ... Sealing material, 11 ... Valve operating tool.

Claims (1)

[Scope of utility model registration request] In order to prevent rainwater from flowing into the valve box when the valve box is opened, which is buried below the ground surface and is always closed with a top cover, in order to operate the underground valve from the ground, a valve is installed. 1. A rainwater inflow prevention member for a valve box for an underground valve, comprising a cylindrical body that watertightly engages on the ground surface around an opening of the box and rises above the opening.