JPH102439A - Valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insulate a valve body positively from the ground in a valve installed underground and facilitate assembly of the valve body and a support base. SOLUTION: A valve body 2 is manufactured by providing its bottom part with an external thread part 2a, and a support base 3 is manufactured of non-metallic material with insulating property by providing its top part with an internal thread part 3a to be screwed with the external thread part 2a of the valve body 2. Parts such as insulating packing, an insulating washer, an insulating sleeve and bolts heretofore needed can thereby be omitted to simplify assembling work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a valve installed underground.

[0002]

2. Description of the Related Art Valves installed in the ground are susceptible to electrolytic corrosion. In order to prevent such corrosion, anti-corrosion treatment is usually performed and a base is provided.

For example, in the valve 1 shown in FIGS. 3 and 4, the valve body 2 and the gantry 3 are manufactured separately, and after each of them is subjected to a treatment such as anticorrosion coating, the valve body 2 and the gantry 3 are mounted.
Are fixed in an insulated state so that the corrosion prevention of the valve body 2 can be maintained even when the corrosion prevention of the gantry 3 is broken.

In order to fix the valve body 2 and the gantry 3 in an insulated state, the valve body 2, the gantry 3 and the bolts 4 for fixing them are made of metal. With an insulating packing 5 interposed, an insulating sleeve 6 and an insulating washer 7 are mounted between the gantry 3 and the bolt 4.

[0005]

However, the conventional valve as described above requires an insulating material such as an insulating packing 5, an insulating sleeve 6, and an insulating washer 7, which not only increases the number of parts to be secured, but also increases the number of parts to be secured. However, there is a problem that the assembling work becomes complicated.

Further, in the assembly of the valve body 2 and the gantry 3, the gap between the wall surface of the gantry 3 and the head of the bolt 4 becomes small, so that it is difficult to apply a final heavy-duty anticorrosion coating, There is a problem that it easily becomes defective.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a valve which can reliably insulate the valve main body from the ground and can easily assemble the valve main body and the gantry.

[0008]

In order to solve the above-mentioned problems, a valve according to the present invention is a valve comprising a valve body and a support base for supporting the valve body, wherein the support base has a non-insulating property. It is made of a metal material, and has a threaded portion formed on the top portion that is mutually screwed with the bottom portion of the valve body.

According to the above construction, the support base can be directly assembled to the valve main body by screwing the screw part of the support base to the screw part of the valve main body. Can be insulated more reliably than the ground. Also, since the shape of the mounting portion between the valve body and the support base is smooth, the final heavy duty anticorrosion coating can be easily performed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of a valve installed underground. The valve 1 is composed of a valve body 2 and a support base 3 for supporting the valve body.

The valve body 2 is made of a metal material, has a male thread 2a at the center of the bottom surface, and has a corrosion-resistant coating applied to portions other than the male thread 2a. The support base 3 is made of an insulating non-metallic material such as ceramic, resin such as FRP and vinyl chloride, and has a female screw 3a screwed to the male screw 2a of the valve body 2 at the top. Is formed.

The support base 3 is directly attached to the valve main body 2 by screwing the male screw 2a of the valve main body 2 with the female screw 3a of the support base 3. When assembling such a valve 1, it is only necessary to screw the male screw portion 2a of the valve body 2 and the female screw portion 3a of the support base 3, and after installation, the valve body 2 is securely insulated from the ground. it can. Therefore, components such as an insulating packing, an insulating sleeve, an insulating washer, and a bolt for coupling, which are conventionally required for securing insulation, are unnecessary, and the assembling work is facilitated. Further, since the shape of the mounting portion between the valve body 2 and the support base 4 becomes smooth, the final heavy-duty anticorrosion coating can be easily performed.

In place of the above-described configuration, as shown in FIG. 2, even if a female screw 2b is formed at the bottom of the valve body 2 and a male screw 3b is formed at the top of the support base 3, The same effect can be obtained.

[0014]

As described above, according to the present invention, the support base is manufactured from a nonmetallic material having an insulating property, and the support base is directly fixed to the valve body by screwing. Can be more reliably insulated from the ground, and conventionally required parts such as an insulating packing, an insulating washer, an insulating sleeve and a bolt can be omitted, and the assembling work can be simplified. In addition, since the shape of the mounting portion between the valve body and the support base is smooth, the occurrence of pinholes during the final heavy-duty anticorrosion coating can be suppressed, and workability is improved.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a main part showing a mounting structure of a valve body and a support base in a valve according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part showing a mounting structure of a valve body and a support base in a valve according to another embodiment of the present invention.

FIG. 3 is a front view showing a schematic overall configuration of a conventional valve installed underground.

FIG. 4 is a partially cutaway view showing a structure of a mounting portion between a valve body and a gantry in the valve of FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve 2 Valve body 3 Support stand 2a Male screw part 3a Female screw part 2b Female screw part 3b Male screw part

Claims (1)

[Claims] 1. A valve comprising a valve body and a support base for supporting the valve body, wherein the support base is made of a nonmetallic material having an insulating property, and is provided on a top part with a bottom part of the valve body. A valve having a threaded portion to be screwed together.