JPH0619884Y2 - Soft seal type valve packing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to packing of a soft seal type valve.

[Prior Art] Conventionally, as shown in FIG. 5, for the purpose of softening the contact of the valve body with respect to the valve seat, achieving reliable water tightness, and improving the efficiency of running water when the valve is opened. Soft-sealed valves have been proposed and implemented.

This soft seal type valve A has a straight tubular main body B,
A cylindrical casing portion E for receiving the valve body C and the valve rod D is formed orthogonally to each other, in which a substantially cylindrical shape or a substantially frustoconical body is used as a base, and the outer peripheral contour is along the inner surface of the valve box F. The valve body C is fitted and the seal packing G is provided on the outer surface of the valve body C.

[Problems of conventional technology]

By the way, since the valve body C has a three-dimensional three-dimensional shape, the sealing packing G fitted to the outer periphery of the valve body C also has a sixth shape.
As shown in the figure, it is necessary to have a three-dimensional structure in which the U-shaped portion G ₂ is integrally provided on the annular portion G ₁ , and therefore there is a problem that the manufacturing of the sealing packing G is not easy.

That is, as the sealing packing G becomes larger as the valve body C becomes larger, the packing G also needs to be made larger as a result of the packing G becoming larger, and the rubber volume of the sealing packing does not become so large. Nevertheless, there was a problem that the larger the valve, the higher the manufacturing cost.

[Problems solved by the invention]

In view of the above problems, the present invention can be manufactured at low cost even if the packing is compatible with any large valve body,
Further, the object of the present invention is to provide a packing of a soft seal type valve which can be remarkably reduced in storage volume and transportation volume and can be easily incorporated into the valve body when molding the valve body.

[Technology for solving problems]

That is, the packing of the soft seal type valve according to the present invention is fitted along the outer peripheral contour of the main body portion of the soft seal type valve in which the base portion of the valve main body portion having the contour shape along the inner surface of the valve box is cylindrical. The U-shaped packing and the ring-shaped packing fitted along the outer periphery of the main body are separately provided, and the open end of the U-shaped packing is provided in a fitting groove formed in the inner circumference of the ring-shaped packing. It is characterized in that it can be fitted.

〔Example〕

 Next, this invention will be described with reference to examples.

FIG. 1 is an exploded perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which the soft seal valve is attached to a valve body.

The packing 1 of the soft seal type valve of the present invention is a soft seal type in which the base portion C ₁ of the valve main body portion C ₂ having a contour shape along the inner surface (not shown) of the valve box is formed into a cylindrical shape (see FIG. 2). The U-shaped packing 1A fitted along the outer peripheral contour of the valve C _{2 and} the annular packing 1B fitted along the outer periphery of the main body base C ₁ are separate bodies, and the annular packing 1B The open ends 4 and 4 of the U-shaped packing 1A can be fitted in the fitting groove 3 provided in the inner peripheral surface 2.

The shape of the fitting groove between the annular packing 1B and the U-shaped packing 1A is as follows with respect to the T-shaped groove 3 as shown in FIG.
In addition to the T-shaped heads 4 and 4, a fitting structure (indicated by 3'and 4 ') bent in a hook shape as shown in FIG. 3 may be used.

Further, recesses 5 and 5 may be provided on the side surface 1A 'of the U-shaped packing 1A as shown in FIG.

[Action]

In the packing 1 of the soft seal type valve of the present invention, the U-shaped packing 1A and the annular packing 1B are molded by separate molds, and then assembled into a three-dimensional three-dimensional structure by fitting.

Then, after that, it is mounted in a valve body molding die device (not shown) of the soft seal type valve and integrated with the valve body at the time of molding the valve body by resin injection or the like.

At this time, pressure is applied to the fitting portion of the packing 1 outward from the inner surface of the annular packing 1A, so that the fitting portion with the U-shaped packing 1B is tightly pressed and does not come off.

As shown in FIG. 4, the U-shaped packing 1A side surface 1
When the recesses 5 and 5 are provided in A ', the resin forming the valve body also enters into the recesses 5 and 5 and hardens, so that the adhesion with the valve body is improved, and the annular packing 1B and the U-shape are formed. The fitting state with the linear packing 1A is strengthened.

〔effect〕

Since the packing of the soft seal type valve of the present invention comprises the annular portion and the U-shaped portion as separate bodies, it is necessary to integrally preform the annular portion and the U-shaped portion as in the conventional case. It is not necessary to prepare, the packing molding die is downsized, and the packing molding time can be shortened, so that the packing can be molded very easily, and the packing structure has an annular portion and a U-shaped portion. Since the members can be stored flatly in the valve body manufacturing process, the storage volume and the transport volume can be significantly reduced, and after assembly,
Since it is physically integrated with the constituent resin of the valve body, there is no risk of separation and drop from the valve body, and despite the divided structure, it has various effects such as good sealing performance and durability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a perspective view showing a state where the soft seal valve is attached to a valve body, and FIGS. 3 and 4 are main parts of other embodiments. Perspective view, FIG. 5, 6
The figure is an explanatory sectional view and a perspective view of a conventional example.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuichi Yoneda 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Vinyl Pipe Factory (72) Inventor Keiji Matsumoto 64, Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd. Company's vinyl pipe factory (72) Inventor Hidekazu Enomoto 64 Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Vinyl pipe factory (72) Kenzo Nishitani 64, Ishizukitamachi, Sakai City, Osaka Prefecture Kubota Iron Works Co., Ltd.Vinyl Inside a pipe factory (56) References Published by Sho 55-26611 (JP, Y1)

Claims (2)

[Scope of utility model registration request] 1. A U-shaped packing fitted along the outer peripheral contour of the main body of a soft-seal type valve in which the base of the valve main body having a contour shape along the inner surface of the valve box is cylindrical. And a ring-shaped packing fitted along with the ring-shaped packing are separated from each other, and the open end of the U-shaped packing can be fitted into a fitting groove provided in an inner peripheral portion of the ring-shaped packing. Soft seal valve packing characterized by 2. The packing for a soft seal type valve according to claim 1, wherein the U-shaped seal packing is provided with a recess on the side surface thereof.