JPS62246662A - Butterfly type valve - Google Patents

Abstract

PURPOSE:To manufacture at a low cost by constituting with a case body made of a metallic tube, and a butterfly valve consisting of two metallic dish-like disk and a corrugated metallic disk. CONSTITUTION:A case body is A formed by annularly cutting a metallic tube of a specified diameter. A butterfly valve C is made by joining a pair of thin dish-like disks 5 of metallic sheets together at their concave parts with a corrugated metallic reinforcement disk 6 held in between and welding all the three together at the joined periphery of the two dish-like disks and at the raised parts on both sides of the corrugated reinforcement disk 6. An operation shaft D is formed with its top end as a rotary operation part 13 below which a flange- shaped large diametered part 14 is arranged and further below it two splined parts 15 are formed by cold forging.

Description

[Detailed description of the invention] C) Industrial application field) This invention relates to improvements in butterfly valves.

C. Prior Art) Conventionally, the case body and the butterfly valve of a butterfly type valve are generally formed by casting.

Problems to be solved by the invention C) Molding a butterfly valve by casting requires the labor of many people in multiple steps, and extremely complicated facilities including exhaust gas treatment etc. are required as auxiliary equipment. The method required hot work, which was environmentally problematic, and as a result, the production cost was extremely high, and it also required a considerable amount of materials, making it economically disadvantageous.

In view of the above-mentioned disadvantages of the conventional technology, the present invention eliminates the casting means and obtains a high-quality, low-cost butterfly-type valve, which is made of a short metal tube of a predetermined diameter. A through hole is formed in the middle part of the toric body, and a concave hole is formed opposite to the through hole and protrudes outward on the other side, and a tube of a flanged cap is formed around the through hole of the toric body. The case body is welded together with a pair of plate-shaped metal discs, with wavy uneven parts formed on the inside, and the five parts of the discs are welded together with a friendly metal reinforcing disc interposed to form a single body. A butterfly valve is a butterfly valve in which a metal seat piece having at least one insertion hole on the upper and lower sides of the outer side of a hollow valve body is welded to the valve body with the axes of both insertion holes aligned, and a flange-like seat piece is provided in the upper middle. It consists of each member: an operating shaft piece forming a large diameter part, a seal ring made of an elastic material and forming an elastic support part along the inner peripheral surface, and a holding cap for the operating shaft piece. Insert the operating shaft piece from the flanged cap of the case body that houses the valve and has a seal ring attached to the inner circumferential surface, insert the operating shaft piece through the insertion hole of the upper and lower seat pieces of the butterfly valve, and connect the lower end of the piece to the case body. It is rotatably fitted and supported in the concave hole of the main body, and the cap is fitted and fixed in the upper flanged cap to hold down the large diameter portion of the operating shaft piece, and it is moved along the inner circumference of the case body. It is characterized by a seal ring being glued to tightly hold the outer periphery of the butterfly valve during the closing operation.

C Example) Butterfly type valve according to the present invention, C, case body A,
Flange cap 11 Butterfly valve 0, operating shaft piece D1 restraint cap L
and the members of the seal ring 1.
When assembled into a body, a valve product as shown in FIGS. 1 and 2 is obtained.

As shown in Fig. 5, the case body AFi is formed of a toric body of a predetermined diameter obtained by cutting a metal tube into rings, for example.This is formed by bending a band of an appropriate width into an annular shape, and attaching the abutting portions at both ends. The toric body AKd may be welded to form a toric body, and a through hole 11) of an appropriate size is opened in the middle position of the toric body AKd, and a concave hole (2 ) are integrally molded.

As shown in Fig. 4, the flanged cap B consists of a cylindrical piece (3) having a protruding flange (4), and the lower edge of the cylindrical piece (3) is surrounded by a through hole (11) in the case body. Weld it together with the case.

As shown in Fig. 5, the butterfly valve 0 has a pair of thin plate-shaped discs (5) made of metal plates that overlap each other in their recesses, forming a wavy uneven part (71) as shown in Fig. 6. The metal reinforcing disk (6) is sandwiched in the recess, and the joining periphery of both plate-shaped disks +51151 and the peaks on the front and back of the wavy metal reinforcing disk (6) are welded to both plate-shaped disks +51 +!51. As shown in FIG. 7, a hollow valve body (8) with increased mechanical strength is formed by a corrugated metal reinforcing disk (6).
) The butterfly valve 0 is constructed by integrally welding the seat pieces (9) (9) on the upper and lower sides of the - side outer surface of the butterfly valve 0.

The seat piece (9) is a metal cylindrical piece (111) which is press-fitted with corrugated irregularities on the inner periphery as shown in Fig. 9 to form a spline groove in the insertion opening aQ as shown in Fig. 8. Then, this is welded to the valve body (8) K as shown by the phantom lines in FIG.

As shown in Fig. 10, the upper end of the operating shaft piece has a rectangular rotating operating part αj, for example, and a flange-like large diameter part a4 is provided at the bottom thereof, and a spline part (group 151α is cooled) is provided at two locations below. Although it is formed by intermittent forging, the shape of the rotation operation part a3 is arbitrary.

As shown in FIG.
The cylindrical piece (3) has a cylindrical part ae that can be fitted under internal pressure, and a flange piece aD that can be combined with the protruding flange (4) of the flanged cap B.

The seal ring 7 is made of an elastic body made of synthetic resin such as rubber or Teflon, and is made of a base piece 0 as shown in FIG.
A support part 0 with a T-shaped cross section is provided protruding from the ladder, and seat pieces (A) (2) are successively provided on both sides of the base piece Ol to form a U-shaped space in the space formed on both sides of the T-shaped support part α1. A cross-sectional spring material Cυ is inserted to provide elastic resistance to the T-shaped support part 4, and each seat piece (2
1) Each K is provided with a protrusion (C) to prevent the U-shaped spring material eυ from escaping, and to prevent dust from entering the space, and to form a hollow cross-sectional shape, as shown in FIG. 12. It can be formed into a ring shape with a diameter that is inscribed in the case body A, or it can be cut to a predetermined length and connected into a ring shape for use.

A seal ring r is attached to the inner peripheral surface of the case body to which the flanged cap B of the member constructed as described above is attached, and then the butterfly valve 0 is accommodated in the case body A and the flange of the case body is attached. Insert the operating shaft piece from the attachment cap B, insert it through the upper and lower seat pieces (9) (9) of the butterfly valve 0, engage it with the spline, and insert the lower end of the shaft piece into the concave hole (2) of the case body A. ), and hold it in the upper flanged cap B of the case body and insert the cylindrical portion (161) of the cap E, and insert the flange aη into the protrusion (4) of the flanged cap B. c231 etc., and suppress the brim-like large diameter part Q41 of the operating shaft piece 0 with the cylindrical part 0e to remove the shaft piece 0.
A butterfly type valve is assembled and molded to prevent the valve from escaping as shown in FIG.

The seal ring r is attached to the seat pieces (2) on both sides as shown in Fig. 15.
1) Hold down each of the parts (2) with a binding material (2) and weld the binding material (R24) to the inner peripheral surface of the case body using an electron beam or the like and attach it immovably.

(Function) The butterfly valve according to the present invention is connected to pipes by appropriate means, and the butterfly valve 0 opens and closes the pipe by rotating one of the operating shafts, or the flow rate is adjusted by the degree of opening and closing, which is different from the conventional method. It is similar to that.

C) Effects of the Invention) According to the present invention, the case body of the valve can be obtained more simply by cutting a metal tube of a desired diameter into an appropriate length, and forming a through hole and a recessed hole therein. In addition, the butterfly valve has sufficient mechanical strength because it is made by combining two metal plate-shaped disks, welding them together with a corrugated metal disk interposed as a reinforcing material, and forming a hollow shape. The case body and butterfly valve, which are the main components of these components, are plastically worked from sheet metal, and the fixed joints of each component are welded by laser or electron beams, so they can be processed through cold processing, instead of conventional casting or heat processing. It has the advantage of eliminating disadvantages due to inter-processing and enabling economical production.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view of a butterfly valve as a product, FIG. 2 is a cut side view thereof,
Fig. 5 is a perspective view of the case body, Fig. 4 is a perspective view of the flanged cap, Fig. 5 is a perspective view of a dish-shaped metal disc, Fig. 6 is a perspective view of a metal disc with corrugated irregularities, and Fig. 7 The figure is a cut side view of the butterfly valve, Figure 8 is a perspective view of the seat piece, Figure 9 is a perspective view of the metal cylinder piece with unevenness, Figure 10 is a perspective view of the operating shaft piece, and Figure 11 is the stopper base. FIG. 12 is a perspective view of the seal ring, and FIG. 13 is an enlarged sectional view of the seal ring. A... Case body B... Flange base 0...
Butterfly valve D... Operating shaft piece E... Holder cap 7... Seal ring (1)... Through hole
[2)...Recessed hole (51...Dish-shaped metal disk (6)...Wave-shaped uneven metal disk (8)...Valve body (9)...Seat piece (I
I... Insertion hole I... Flange-shaped large diameter member...
・2 people outside the elastic support department < ♀ Doctor C group

Claims (1)

[Claims] A through hole is formed in the middle part of a toroidal body made of a short metal tube of a predetermined diameter, and a recessed hole that is opposed to the through hole and projects outward on the other side,
A case body in which a cylindrical part of a flanged cap is welded around the through hole of the toric body, and a metal reinforcing disc with a corrugated uneven part formed inside a pair of dish-shaped metal discs are interposed. 3 of the disc
metal seat pieces each having an insertion hole are welded to the valve body at least on the top and bottom of one outer surface of the hollow valve body, which is made into a single body by welding two parts together, with the axes of both insertion holes aligned. a butterfly valve, an operating shaft piece having a large-diameter flange-like part formed in the upper middle, a seal ring made of an elastic body and forming an elastic support part along the inner circumferential surface, and a retaining cap of the operating shaft piece. The butterfly valve is housed in the case body, and the operating shaft piece is inserted from the flanged cap of the case body with a seal ring attached to the inner peripheral surface, and is inserted through the insertion hole of the upper and lower seat pieces of the butterfly valve. The lower end of the shaft piece is rotatably fitted and supported in the recessed hole of the case body, and the cap is fitted and fixed in the upper flanged cap to secure the flanged large diameter portion of the operating shaft piece. A butterfly-type valve characterized in that a seal ring is adhered along the inner circumference of a case body so as to tightly hold the outer circumference of the butterfly valve during closing operation.