JPH044376A - Valve - Google Patents

Abstract

PURPOSE:To realize the simplification and the enhancement of efficiency of works such as the process of a valve trunk, the examination of a valve, and the connection of a valve to a piping, by forming a flat surface to be a standard in various works at the whole surface of the bottom of the valve trunk or at the lower edge of flanges. CONSTITUTION:To a valve trunk 1, a flat surface 2 to be the standard of various works is formed to the whole surface of the bottom 1a or the lower edge of flanges 1b. When a hole to which a valve rod 4 is inserted and the like are processed, or when the valve rod 4 or a valve body 3 are inserted to the valve trunk 1, and the like, the above flat surface 2 is abutted to a work table to load the valve trunk, and thereby the valve trunk 1 can be set in a stable condition. Furthermore, in the work to combine the valve trunk 1 to the flanges 7a of a piping 7, a stable condition can be obtained only by loading the valve trunk 1 on a plane form setting position between the flanges 7a. Consequently, various works can be carried out simply and efficiently.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to surface finishing of the main parts of a cast valve body,
A valve that allows you to easily and efficiently assemble the valve body and valve body, inspect the assembled valve at an inspection site, and connect the valve to the flange of the piping. It is related to.

[Conventional technology]

There are many different types of valves that are installed in pipelines to regulate flow, and the shape and type of each component that makes up the valve differs depending on the structure of the valve body.

It is equipped with a valve stem and a valve body.

Such a valve is usually used by connecting the flange portion of the valve to a flange portion provided in the middle of piping.

- To manufacture a valve, first the hole and flange portion of the cast valve body into which the valve body is inserted are surface-finished. The flange portion and the flange portions formed at both ends of the valve body are finished so that they are parallel to each other, and the hole in the valve body into which the valve stem is inserted is formed at right angles to the reference plane during valve installation work. This is very important.

In conventional valves, for example, in the case of an angle valve, the center line of the fluid outlet side and the center line of the fluid inlet side are at right angles, so the fluid inlet side (opposite the valve stem insertion side) If the surface finish of the flange on the side (side) is done accurately, the valve body can be held upright by placing this flange surface on the processing table, and the flange on the fluid outlet side and the insertion hole for the valve body can be aligned. Since these parts are oriented in the same direction, it is possible to precisely finish the surface of these parts. However, the valves are globe valves, gate valves, and ball valves.

In the case of a butterfly valve or the like, for example, in the case of a globe valve, the valve body 1' as shown in FIGS.
The bottom part 1a' of the valve body 1' is formed into a curved surface shape corresponding to the shape of the flow path formed in the valve body 1', and the flange parts 1b' on the inlet side and the outlet side are formed in an annular shape. Torso 1
When the valve body 1' is placed on a workbench when finishing the surface of the hole into which the valve body is inserted, the flange part 1b', etc., the valve body 1' or the valve body 1' is placed on the top surface of the flat workbench. Since the peripheral edge of the annular flange portion 1b' formed at the valve body 1' comes into contact with the valve body 1', the valve body 1' is likely to rotate, resulting in an unstable state. Therefore, conventionally, as shown in FIG. 9(b), the inlet and outlet flange portions 1b' are placed on a support member 5 such as a V-shaped block, and furthermore, as shown in FIG.
As shown in a), the valve body 1 is fixed by using a presser 6 to fix the inlet side and outlet side flange parts 1b' on the workbench.
The surface finishing process was carried out in a stable state where the ′ did not rotate.

In addition, when assembling the valve body 1' with the valve body 1', the weight of the valve used in an industrial plant is 50 kg.
In such heavy valves, the weight support occupied by the valve body 1' is extremely large, making it difficult to support the work tool by hand, etc. In order to position the valve body 1' on the assembly stand in a state where it is easy to install the valve stem and valve body and in a stable state where the valve body 1' does not rotate, the method shown in Fig. 9 (b) is used. As shown in FIG. The valve body 1' is fixed on the assembly table using the holding tool 6.
It is necessary to keep it in a stable state so that it does not rotate.

Furthermore, when inspecting the assembled valve at an inspection site, the inlet and outlet flange portions 1b' are placed on the support member 5 such as a V-shaped block as shown in FIG. 9(b). Furthermore, as shown in FIG. 9(a), the inlet and outlet flanges 1b' are fixed on the inspection table using a presser 6 to keep the valve in a stable state where it will not rotate. I needed to.

In addition, in the piping work to connect the valve to the flange portion 7a of the pipe 7, the end of the pipe 7 adjacent to the connected valve is fixed to the base 8 with a U-bolt/nut 9, as shown in FIG. The purpose was to stabilize the valve and prevent it from falling over due to earthquakes, etc.

[Problem to be solved by the invention]

In this way, for conventional valves, the hole and flange portion of the valve body into which the valve body is inserted are subjected to surface trimming, the valve stem and valve body are attached to the valve body, and the assembled valve is inspected at an inspection site. In order to keep the valve body or valve in a stable state so that it does not rotate during inspections, etc., it is necessary to use a support member or even a holding device. It is necessary to fix the end of the piping adjacent to the base to the base with U bolts and nuts, and it takes a lot of effort to transport and install the support members and holding tools, and to transport and install the U bolts and nuts during piping work. This method had the disadvantage of reducing work efficiency because it required a lot of time and effort.

The present invention solves the above-mentioned drawbacks of the prior art, and involves surface finishing of the hole and flange portion of the valve body into which the valve stem is inserted, and assembly of the valve stem and valve body onto the valve body.

There is no need to use a support member to keep the valve body or valve in a stable state from rotating during inspections of assembled valves at inspection sites, etc., and during piping work to connect the valve to the flange of piping. does not require work to fix the end of the piping adjacent to the valve to the base with U bolts and nuts,
The object of the present invention is to provide a valve that not only improves work efficiency but also has excellent economic efficiency.

[Means for Solving the Problems] As a result of various studies to solve the problems, the inventor of the present invention found that in conventional valves, the bottom of the valve body is spherical, and the flanges on the outlet and inlet sides are annular. We focused on the fact that the valve body is easily rotated and becomes unstable when it is placed on a work site because of the shape of the valve body. The present invention was completed by discovering that it is sufficient to form a flange 1-face that serves as a reference.

Hereinafter, the valve according to the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing one embodiment of the valve according to the present invention, FIG. 2 is a longitudinal sectional view of the valve body in FIG. 1, FIG. 3 is a side view of the same, and FIG. 4 is the same as that in FIG. FIG. 5 is a longitudinal sectional view showing another embodiment of the valve according to the present invention, FIG. 6 is a longitudinal sectional view of the valve body in FIG. 5, and FIG. The same side view and FIG. 8 are front views showing a state in which the valve shown in FIG. 5 is installed.

In the drawings, ] is a valve body that is cast in a shape that has a flow path formed inside and a flat surface 2 that serves as a reference during various operations on the entire surface of the bottom portion 1a or the lower edge of the flange portion 1b,
The shape of the valve body 1 is not limited to the globe valve of the illustrated embodiment, but may also be a gate valve, a ball valve, a butterfly valve, or the like. Further, 3 is a valve body, and 4 is a valve stem fixed to the valve body 3.

[For production]

The valve according to the present invention having the above-described structure has a flat surface 2 when the valve body 1 is placed on a flat part that serves as a reference during work.
Therefore, the valve body 1 is in a stable state and does not rotate.

That is, when surface finishing the hole and flange portion of the cast valve body 1 into which the valve stem 4 is inserted, the bottom portion 1a is
If the valve body 1 is placed so that the flanges 1 and 2 formed on the entire surface or the lower edge of the flange portion 1b are in contact with the workbench, the valve body 1 will be in a stable position and the surface finish will be improved. This allows for better processing. Also, when assembling the valve stem 4 and valve body 3 to the valve body 1, the bottom 1
If the valve body 1 is placed so that the flat surface 2 formed on the entire surface of a or the lower edge of the flange portion 1b is in contact with the assembly table, the valve body 1 will be in a stable position and the assembly work will be easy. It can be done well. When inspecting the assembled valve at an inspection site, hold the valve body so that the flanges 1 to 2 formed on the entire surface of the bottom portion 1a or the lower edge of the flange portion 1b are in contact with the inspection table. If the valve body 1 is placed in a stable position, the inspection work can be performed satisfactorily. Furthermore, the valve is attached to the flange part 7 of the pipe 7.
In the piping work connected to pipe a, the valve will be in a stable state simply by positioning the valve in a flat installation position between the flange portions 78 of the pipe 7, so the end of the pipe 7 should be placed as in conventional piping work. This eliminates the need for work such as fixing the parts to the base 8 with U-bolts 1 to 9.

〔Effect of the invention〕

As described in detail above, in the valve according to the present invention, a flat surface is formed on the entire bottom of the valve body or on the lower edge of the flange portion, which serves as a reference during work. Easy and efficient work such as finishing, assembling the valve stem and valve body to the valve body, inspecting the assembled valve at the inspection site, and connecting the valve to the flange of the piping. It is possible to do so, and its industrial value is extremely large.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the valve according to the present invention, FIG. 2 is a longitudinal sectional view of the valve body in FIG. 1, FIG. 3 is a side view of the same, and FIG. 4 is the same as that in FIG. FIG. 5 is a longitudinal sectional view showing another embodiment of the valve according to the present invention, FIG. 6 is a longitudinal sectional view of the valve body in FIG. 5, and FIG. FIG. 8 is a front view showing the state in which the valve shown in FIG. 5 is installed, and FIG. 9 is a cross-sectional view (A) and (
b) The same side view, and FIG. 10 is a front view showing a state in which the valve shown in FIG. 9 is installed. In the drawing, J-...Valve body 1a...Bottom part 1b...Flange part 1'...Conventional valve body la'...Bottom part Ib'...Flange part 2. ... Flat surface 3 ... Valve body 4 ... Valve stem 5 ... Support member 6 ... Holder 7 ... Piping 7a ... Flange part 8 ...・Base 9... U-bolt/nut patent applicant Koso Service Co., Ltd.

Claims (1)

[Claims] 1 The entire surface of the bottom (1a) of the valve body (1) or the flange part (
1b) A valve characterized in that a flat surface (2) is formed on the lower edge thereof to serve as a reference during work.