JPH0340265B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a centering device for aligning the center lines of a butterfly valve and piping when installing the butterfly valve in a piping system.

[Conventional technology]

When installing a chimney valve in a pipeline, the center axes of the chimney valve and the piping must match, but the flange standards on the piping side differ in Japan and overseas, and the pitch and diameter of the mounting bolts also vary. There are many types of , numbers, etc.

Since it is practically impossible to prepare a wide variety of chimney-shaped valve bodies to accommodate such diversity in piping, various methods have been proposed and adopted in the past. .

One such method is to form an elliptical or polygonal centering hole 1 in the valve body as shown in Fig. 6, but this method cannot accommodate about two types of flange standards. Because it is not too much and not enough,
Many standards for chiyo-shaped valves had to be prepared.

The second method, as shown in Fig. 7, is to attach a centering bracket 2, which is formed separately on the valve body, to a screw 3.
etc., and by replacing the bracket 2, it is possible to adapt to the diversity of piping, as disclosed in, for example, US Pat. No. 4,399,833.

[Problem to be solved by the invention]

In the first method, it is practically impossible to deal with the diversity of flange specifications on the piping side. or,
In the second method, if the flange standard is changed after assembly is completed, it is necessary to disassemble and reassemble, which is time-consuming and difficult, and it is difficult to change the flange standard at the site. If disassembly and assembly are required, there is a risk that parts may be lost or assembled incorrectly. Furthermore, screw holes must be formed in the main body to attach the bracket, which requires time and effort, and when attaching the post-shaped valve to the piping, there is a risk of suspending a bracket that is not strong enough with wire, etc. It was hot.

This invention eliminates the drawbacks of conventional valves and makes them easily variable according to flange standards.This invention also makes it possible to change the valve itself even after assembly without disassembling the valve itself, and there is a risk of the valve being suspended by wires, etc. Moreover, there is no need for screw processing such as mounting a bracket.

[Means for solving problems]

In order to solve the above-mentioned problems, the method taken by the present invention is to extend the seat ring fixed to the main body of the honeycomb valve to the flange surfaces on both sides, and to increase the thickness corresponding to the gap between the main body and the piping flange bolts. The centering attachment is removably attached to the seat ring and positioned between the main body and the piping flange bolt.

〔Example〕

A preferred embodiment of the invention will be described with reference to FIGS. 1 to 5. In the figure, reference numeral 10 denotes a cylindrical main body, within which a disc-shaped valve body 11 is rotatably supported. 12 is the main body 10
A sheet link fixed to the inner circumferential surface of the seat, made of rubber or synthetic resin. seat ring 12
As shown in the drawings, groove-like engaging portions 13 are formed which extend diametrically along both side flange surfaces of the main body 10 and are aligned with the positions of the bolts 14 of the piping flange, allowing engagement of hooks.

15 is a centering attachment, especially the fourth
As shown in the figure, the hook portions 16 at both ends are engaged with the engaging portions 13 so as to cover the outer peripheral surface of the main body 10, and the hook portions 16 are attached to the main body 10. At least a portion 15a of the centering attachment 15 has a thickness corresponding to the gap between the outer peripheral surface of the main body 10 and the piping flange bolt 14, and the centering attachment 15
This allows the central axes of the piping side and the chimney-shaped valve to be accurately aligned. If the standard of the piping flange changes, it can be easily handled by replacing it with a centering attachment 15 of a different thickness.Moreover, the centering attachment 15 can be replaced by simply engaging and removing the hook. It is extremely easy to replace.

The centering attachment 15 is preferably a molded product of synthetic resin or rubber having desired elasticity, but is not limited thereto. It goes without saying that its shape is not limited to that shown in FIGS. 1 to 4, and various modifications as shown in FIG. 5 are possible. The one shown in FIG. 5A has spring elasticity by forming at least one bent part 15b on both sides of the thick part, B shows a plate spring bent into a wave shape, and C shows a coil spring. D is a rubber plate with metal hooks fixed to both sides.

The engagement between the centering attachment 15 and the seat ring 12 is not limited to the groove-shaped engagement portion 13 and the hook portion 16. The engaging portion 13 of the seat ring 12 may be formed into a cross-section with a round hole that is opened outward, and the hook portion may be inserted into the hole. good.

〔Effect of the invention〕

According to this invention, the seat ring fixed to the main body of the chimney-shaped valve is extended to the flange surfaces on both sides,
A centering attachment with a thickness corresponding to the gap between the main body and the piping flange bolt is removably attached to the seat ring, and is positioned between the main body and the piping flange bolt. It can be effective.

(b) By preparing multiple centering attachments according to the flange standard, centering becomes easier and accuracy is improved, and the main body can be made into one unified standard.

(b) Since the engaging portion of the seat ring can be molded at the same time as the seat ring is molded, there is no increase in cost.

(c) Since it is only necessary to replace the centering attachment, there is no need to disassemble the valve body even if the flange standard is changed.

(d) There is no need for machining as in the case of attaching a bracket to the main body, and only molding of the seat ring is required, making it possible to reduce costs and achieve mass production.

(E) Since it is impossible to suspend the centering attachment part with a wire, etc., there is no risk of danger as would occur when suspending a conventional bracket with a wire.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the centering state by the centering device according to the present invention, Fig. 2 is a front view of the main body, Fig. 3 is a perspective view showing the relationship with the piping side, and Fig. 4 is a main part. A sectional view, FIG. 5 is a perspective view showing a modification of the centering attachment, and FIGS. 6 and 7 are front views of a valve equipped with a conventional centering device. 10... Body, 11... Valve body, 12... Seat ring, 13... Engaging portion, 14... Piping flange bolt, 15... Centering attachment, 16...
Futsuku department.

Claims (1)

[Claims] 1. Extend the seat ring fixed to the main body of the chi-shaped valve to the flange surfaces on both sides, attach a centering attachment having a thickness corresponding to the gap between the main body and the piping flange bolt to the seat ring in a detachable manner, A centering device for a chimney-shaped valve, characterized in that it is located between the main body and a piping flange bolt.