JPH0222533Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is characterized in that a sub-valve body, a sub-valve stem, and a sub-valve box are integrally and detachably attached to the main valve body, and an elastic seat is provided for the sub-valve body. This invention relates to a seat mounting structure for a butterfly valve with a built-in sub-valve.

[Conventional technology]

Conventionally, as shown in FIG.
is screwed to the sub-valve body 15, and the elastic sheet 19 is attached to the sub-valve body 10 by a retaining plate 23 fixed with bolts 24.
The sub-valve box 15 was detachably attached to the main valve body 1 (for example, as disclosed in Japanese Utility Model Application Publication No. 59-66066).

[Problem that the invention attempts to solve]

However, in order to attach the elastic sheet 19 to the sub-valve body 9, a holding plate 23 and a large number of bolts 24 are required.
The number of parts increases, which is disadvantageous in terms of cost and parts management, and it is troublesome to assemble and disassemble the elastic sheet.

The purpose of the present invention is to eliminate the need for a special member for attaching the elastic sheet even though it is a simple modification that effectively utilizes the original structure.

[Means for solving problems]

The characteristic configuration of the present invention is that the elastic sheet for the auxiliary valve body is held between the main valve body and the auxiliary valve box that is detachable from the main valve body, and its effects are as follows.

[Effect]

In other words, if you take advantage of the original configuration in which the sub valve box is detachable from the main valve body and sandwich the elastic seat between the main valve body and the sub valve box, you will not need any special members for attaching the elastic seat. It can be made unnecessary.

[Effect of idea]

As a result, the number of parts can be greatly reduced by eliminating the need for special members for attaching the elastic seat, and it is possible to provide a butterfly valve with a built-in sub-valve that is superior in terms of parts management, parts cost, manufacturing, and repair inspection. It became like that.

〔Example〕

Next, an example will be shown with reference to FIGS. 1 and 2.

The main valve rods 2a and 2b connected to the main valve body 1 are rotatably attached to the main valve box 5 by bearings 3a and 3b and bushes 4a and 4b, and one of the main valve rods 2a and a rotating shaft for main valve operation are attached. 6 are interlocked and connected by a worm gear reducer in a case 7, so that the main valve body 1 can be opened and closed.

A flow passage 8 is formed in the main valve body 1, and a sub-valve body 9 for opening and closing the flow passage 8 is connected to a sub-valve rod 10.
1a, 11b, O-ring case 12, thrust bearing 13, cover 14, etc.
is rotatably attached to the auxiliary valve box 15, and the auxiliary valve operating rotation shaft 16, which passes through the main valve rod 2a, is fitted to the auxiliary valve rod 10 so as to rotate integrally with the coupling 17, and the auxiliary valve body 9 is rotated. It is configured so that it can be opened and closed.

The sub-valve box 15 is detachably attached to the main valve body 1 with bolts 18, and the elastic seat 19 is attached to the sub-valve body 9.
between the main valve body 1 and the sub-valve box 15 and the bolt 18
It is held in place by tightening.

The auxiliary valve operating rotating shaft 16 is attached so that it can be freely inserted into and removed from the auxiliary valve rod 10 with the operating part case 20 removed from the reducer case 7. With the exercise rotation shaft 16 removed from the auxiliary valve stem 10, the auxiliary valve body 9, the auxiliary valve stem 10, and the auxiliary valve box 15 are attached to the main valve body 1 so as to be integrally attachable and detachable, and the elastic sheet 1
9 is made easy to replace.

A seal between the main valve body 1 and the sub-valve box 15,
It is provided with an elastic sheet 19 and an O-ring 21 to provide sufficient water-tightness.

[Another example]

Next, another example will be described.

The structure, shape, material, etc. of the elastic sheet 19 can be changed as appropriate, and the structure in which the elastic sheet 19 is held between the main valve body 1 and the sub-valve box 15 can also be changed as appropriate.

Opening/closing operation configuration of main valve body 1 and sub-valve body 9, sub-valve rod 1
In terms of the structure for engaging and disengaging the operating mechanism with respect to 0, and other aspects, the specific configuration of the butterfly valve can be changed as appropriate.

[Brief explanation of the drawing]

FIG. 1 is a partially sectional side view showing an embodiment of the present invention, and FIG. 2 is an exploded sectional view of the main part of FIG. FIG. 3 is an exploded sectional view of essential parts of a conventional example. 1...Main valve body, 9...Sub-valve body, 10...Sub-valve rod, 15...Sub-valve box, 19...Elastic sheet.

Claims (1)

[Scope of utility model registration request] In a butterfly valve with a built-in sub-valve, in which a sub-valve body 9, a sub-valve stem 10 and a sub-valve box 15 are integrally and detachably attached to the main valve body 1, and an elastic sheet 19 is provided for the sub-valve body 9, the elastic sheet 19 is a seat mounting structure of a butterfly valve with a built-in auxiliary valve, which is held between the main valve body 1 and the auxiliary valve box 15;