JP2000161518A - valve - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a valve in which a valve element is disposed inside a metal reinforcement without dividing the metal reinforcement. SOLUTION: A valve 1 made of a synthetic resin in which a spherical valve body 3 is inserted into a valve body 2 whose central part is enlarged in diameter, a stem hole 42 of the valve body 3 at an upper part, and a stem hole 42 at a bottom part. The valve body insertion holes 43 are respectively opened, and the metal reinforcing member 4 in which the holes 41 are punched over the entire surface is embedded in the synthetic resin of the valve body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a synthetic resin valve.

[0002]

2. Description of the Related Art Conventionally, synthetic resin valves have been widely used in domestic hot water supply, water supply lines and chemical liquid lines because they are excellent in corrosion resistance of chemicals and the like, can be easily produced and can be provided at low cost. However, in the case of synthetic resin valves, since the valve body is molded by injection molding, a weld line is inevitably formed at a position distant from the gate part, which is weaker than other parts and is damaged by external loads Easy to be the starting point of Also, if the valve port connected to the pipe is provided with a tapered female screw, if you try to screw in the metal pipe to connect it, the strength of the metal pipe will be stronger, so the receptacle port will be pushed open and damaged. There was a risk of dropping or dropping out.

Accordingly, as in the valve described in Japanese Utility Model Application Laid-Open No. 7-4971, a metal fastening ring is fitted on the outer peripheral surface of the socket of the valve connected to the pipe,
As in JP-A-133279 and JP-A-62-151472, it has been proposed to reinforce the socket of the valve with a ring-shaped reinforcing material, but in any of the methods, a part of the reinforcing material is exposed outside the valve. Therefore, there is a problem in the corrosion resistance of the synthetic resin valve body.

Therefore, as described in Japanese Patent Application No. 9-315557, a means has been considered in which a reinforcing material such as a metal is completely combined with a synthetic resin to improve the strength while maintaining corrosion resistance. However, it was necessary to set the valve body in a mold after disposing the valve body inside the reinforcing material as a pre-forming step. But,
From the shape of the product, a method was used in which the metal reinforcing material was divided at the center to insert the valve element, the valve element was inserted, and then welding was performed again.

[0005]

However, according to this method, the production process of the product is greatly increased, and the original strength cannot be sufficiently secured in the welded portion due to a cause such as poor welding. The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a valve in which a valve element is disposed inside a metal reinforcement without dividing the metal reinforcement. is there.

[0006]

According to a first aspect of the present invention, there is provided a valve made of a synthetic resin having a valve body inserted into a valve body, a stem hole of the valve body at an upper part, and a stem hole at a bottom part. The valve body insertion holes are respectively opened, and a metal reinforcing material whose center portion is enlarged by punching is embedded in the synthetic resin of the valve body.

According to a second aspect of the present invention, in the valve of the present invention, the valve element insertion hole opened at the bottom of the metal reinforcing member has a rectangular shape having a long side and a short side, and the long side extends in the pipe axis direction. Is what is being done.

[0008]

According to the first aspect of the present invention, there is provided a valve having a metal reinforcing material embedded in a synthetic resin of a valve body, a stem hole for a valve body at an upper part, and a valve body insertion hole at a bottom part. Since the opening is provided, the valve body can be disposed inside the metal reinforcing member without dividing the metal reinforcing member, so that welding is unnecessary and production is facilitated. Further, since holes are punched in the entire surface of the metal reinforcing material, the metal reinforcing material is well welded to the synthetic resin, and the strength of the valve can be improved.

According to a second aspect of the present invention, in the valve, the valve element insertion hole opened at the bottom of the metal reinforcing member has a rectangular shape having a long side and a short side, and the long side extends in the pipe axis direction. As a result, a sufficient reinforcing area of the metal reinforcing member at the center of the valve body can be secured, and the strength can be stabilized.

[0010]

Embodiments of the present invention will be described with reference to the drawings. FIGS. 1A and 1B are sectional views showing a valve in which a metal reinforcing material according to the present invention is combined.
(A), FIG. 2 (B), FIG. 2 (C) are explanatory diagrams showing a metal reinforcing material, and FIGS. 3 to 5 are explanatory diagrams showing a state in which a valve element is inserted into the metal reinforcing material.

As shown in FIGS. 1A and 1B, the valve 1 comprises a valve body 2, a valve body 3 forming a part of the valve, a seat ring 5, a metal reinforcing material 4, It has. The valve 1 of the present invention may be used in a portion that is easily damaged when a load is applied from outside or inside the valve body 2 made of a synthetic resin, or a portion that is likely to be deformed and cause a connection failure.
The metal reinforcement 4 is embedded and integrated in the valve body 2 so that the front surface is surrounded by the synthetic resin forming the valve body 2.

The valve body 2 is formed of a synthetic resin material having excellent corrosion resistance, and has receiving ports 21 and 21 at both ends.
A female screw 22 is provided on the inner peripheral surface of the receiving port 21. The synthetic resin for molding the valve body 2 is not particularly limited, but may be polyvinyl chloride (PVC), chlorinated polyvinyl chloride (cPVC), polyvinylidene fluoride (PVDF),
Examples include polyphenylene sulfide (PPS) and polypropylene (PP).

The valve body 3 has a spherical shape, is provided with a tubular pipe inside, is formed of a synthetic resin material having excellent corrosion resistance, and is rotatably housed in the valve body 2. A metal handle receiving portion 32 is provided at the tip of the stem portion 31 on the upper portion of the valve body 3 so as to protrude from the valve body 2. At both ends of the pipe of the valve body 3, cut surfaces 32 in which the outer shape of a sphere is cut are provided. Therefore, the cut surface 32 is made smaller than the outer diameter of the sphere so that it can be easily inserted into the metal reinforcing member 4. The seat ring 5 is provided inside the valve body 2 and is made of a synthetic resin having excellent corrosion resistance. The seat ring 5 includes the valve body 3 and the valve body 2.
And the watertightness of the sliding part is maintained.

FIG. 2A, FIG. 2B, and FIG. 2C show the metal reinforcing member 4. The metal reinforcing member 4 is formed of a stainless steel pipe metal material. The metal reinforcing member 4 is embedded in the synthetic resin in the valve body 2, and provided with a straight pipe portion 4 a and a central portion 4 b gradually expanding in diameter from the straight pipe portion 4 a along the shape of the valve body 2. Receiving port 2 by straight pipe section 4a
1 from the outside surrounding the formation portion of the female screw 22 and the central portion 4b
Thereby, the valve body 3 is surrounded from the outside. Thus, the metal reinforcing member 4 is completely isolated from the outside by the synthetic resin constituting the valve body 2. The metal reinforcing material 4 is formed into a regular shape by reducing the diameter of the straight pipe portions 4a at both ends by pressing from a stainless steel pipe having a diameter corresponding to the maximum outer diameter of the central portion 4b.

As the metal reinforcing member 4, a metal material such as iron, stainless steel, aluminum, copper, and copper alloy is usually used. Further, the thickness of the metal reinforcing member 4 is preferably 0.2 mm or more, and it is preferable to provide the surface with a punching process or a knurling process, or to form a projection by projecting a ridge to provide unevenness.

In this embodiment, both ends of a stainless steel tube having an outer diameter of 34 mm were reduced by press working, and a punching press was used to form a punching hole 41, a stem hole 42, and a valve element insertion hole 43. Alternatively, the central portion of a stainless steel tube having an outer diameter of 28 mm may be enlarged. The punching hole 41, the stem hole 42, and the valve body insertion hole 43 may be formed by laser or the like.

The metal reinforcing member 4 is entirely provided with holes formed by punching (hereinafter referred to as "punching holes 41"), and the punching shape is circular. The punching hole 41 has an opening ratio of 10 to 80%.
The diameter of the hole is preferably φ2 to 10 mm. In this embodiment, 1 mm stainless steel was used and punching was performed with an aperture ratio of 40% and a hole diameter of 6 mm.

The shape of the punching hole 41 of the metal reinforcing member 4 is not limited to a circle, but may be a square, a rectangle, a flower, an oval, or the like.

Two holes are provided at the center of the metal reinforcing member 4. One is a stem hole 42, and the other is a stem hole 42, as shown in FIG. As shown in FIG. 2 (c), a valve element insertion hole 43 is provided. In the present embodiment, the stem hole 42 of the metal reinforcing member 4 is formed in a circular shape of 20 mm without being exposed to the outside of the molded product and in consideration of the reinforcing effect, but is not limited to the circular shape.

The valve element insertion hole 43 is formed in a rectangular shape having a long side 44 along the longitudinal direction of the metal reinforcing member 4, and has a shape in which the valve element 3 is inserted in the closing direction. It is preferable that the four corners of the valve element insertion hole 43 have a round shape. In the present embodiment, the four corners have a radius of 5 mm. The four corners of the rectangular shape of the valve element insertion hole 43 have a rounded shape, so that the strength of the metal reinforcing member 4 due to stress concentration is prevented from being reduced.

The valve element insertion hole 43 is a substantially rectangular shape having a long side 44 in the axial direction of the metal reinforcing member 4 and a short side 45 in a direction perpendicular to the axis, and the long side 44 is slightly longer than the diameter of the valve element 3. , Short side 4
5 is slightly longer than the width of the valve body 3. That is, the shape is such that the valve body 3 can be inserted into the metal reinforcing member 4 with the valve body 3 closed with respect to the metal reinforcing member 4.

Further, in the present embodiment, the long side 44 is provided in the axial direction of the metal reinforcing member 4, but may be reversed. However,
When the long side is provided in a direction perpendicular to the axial direction of the metal reinforcing member 4, the reinforcing effect of the valve 15A according to the present embodiment is about １ ／ of the central portion of the main body with respect to the circumferential direction. It is preferable that the long side is provided in the axial direction of the metal reinforcing member 4 to significantly reduce the length. In this embodiment, the valve element insertion hole 43 is used.
Has a substantially rectangular shape, but is not limited to this as long as the valve body 3 can be inserted. For example, any shape may be used as long as the valve body 3 has a substantially sectional shape and the valve body 3 can be inserted.

Preferably, an adhesive layer is interposed between the metal reinforcing member 4 and the valve body 2. The adhesive constituting the adhesive layer is not particularly limited, and examples thereof include a hot melt adhesive, an organic titanate, a coupling agent, and an epoxy adhesive.

The method of manufacturing the valve 1 using the metal reinforcing material 4 includes a part which is easily damaged when a load is applied from the outside of the resin valve body or a part which is likely to be deformed to cause poor connection. Metal reinforcement 4 to reinforce the part
And burying and integrating the entire surface of the metal reinforcing member 4 so as to be surrounded by the synthetic resin forming the valve body 2.

First, as shown in FIGS. 3A and 3B, the valve 3 is inserted into the valve insertion hole 43 of the metal reinforcing member 4 from the stem 31 of the valve 3. When inserting, the valve 3
The cut surface 32 of the valve body 3 is connected to the short side 45 of the valve body insertion hole 43.
, That is, the valve body 3 is closed and the metal reinforcement 4
Insert inside. Since the cut surface 32 of the valve element 3 is smaller than the short side 45 of the valve element insertion hole 43 as shown in FIG. It can be inserted into the reinforcement 4.

After inserting the valve body 3 into the metal reinforcing member 4, FIG.
(B), as shown in FIG. 4 (B) and FIG. 4 (C), the valve body 3 is rotated by 90 degrees inside the metal reinforcing material 4,
The valve body 3 rotates so as to be in an open state. As shown in FIGS. 5 (a), 5 (b) and 5 (c), the metal reinforcing member 4 into which the valve body 3 is inserted is arranged in a mold (not shown). As the mold is closed, both ends of the metal reinforcing material are fixed at predetermined positions by metal reinforcing material fixing portions (not shown) provided on a slide core (not shown). The metal composite valve 15A was molded by a process of injecting a synthetic resin into a mold and embedding and molding the metal reinforcing material 4 integrally with the valve body 2.

As described above, the metal reinforcing material 4 is
When the metal pipe is screwed and joined to the receiving port 21, the metal reinforcing member 4 can prevent damage due to the expansion of the receiving port 21, disconnection, and damage from the weld line. The outer peripheral portion of the stem portion 31 of the valve body 3 of the valve body 2 can be reinforced by the central portion 4b of the metal reinforcing member 4 to prevent breakage from the weld line.

Further, since the metal reinforcing member 4 is completely covered with the resin constituting the valve body 2, the metal reinforcing member 4 does not come into contact with the fluid flowing inside the piping or the external atmosphere. Therefore, as the metal reinforcing member 4,
Even materials with poor corrosion resistance can be used.

That is, according to the valve 1, the receiving port 2
Since the portions 21 and 21 are reinforced by the metal reinforcing material 4, even when the metal pipe is screwed to the socket 21, the diameter of the socket 21 may be increased, and the metal pipe may be damaged or the metal pipe may come off. There is no. Further, a punching hole 41 is formed in the metal reinforcing material 4.
Is provided, the synthetic resin and the metal reinforcement 4
Not only is it preferable because it adheres firmly, but also at the time of injection molding, a flow path of the synthetic resin can be secured, and the metal reinforcing material 4 does not float due to resin pressure.

[0030]

According to the first aspect of the present invention, there is provided a valve having a metal reinforcing material embedded in a synthetic resin of a valve body, a stem hole of a valve body at an upper part, and a valve body insertion hole at a bottom part. Are opened, so that the valve element can be disposed inside the metal reinforcing member without dividing the metal reinforcing member, so that welding is unnecessary and production is facilitated. Further, since holes are punched in the entire surface of the metal reinforcing material, the metal reinforcing material is well welded to the synthetic resin, and the strength of the valve can be improved.

According to a second aspect of the present invention, the valve body insertion hole opened at the bottom of the metal reinforcing member has a rectangular shape having a long side and a short side, and the long side extends in the pipe axis direction. As a result, a sufficient reinforcing area of the metal reinforcing member at the center of the valve body can be secured, and the strength can be stabilized.

[Brief description of the drawings]

FIGS. 1A and 1B are cross-sectional views showing a valve in which a metal reinforcing material according to the present invention is combined.

FIGS. 2 (a), 2 (b), and 2 (c) are explanatory views showing a metal reinforcing material.

FIG. 3 is an explanatory view showing a state in which a valve body is inserted into a metal reinforcing member.

FIG. 4 is an explanatory view showing a state in which a valve body is inserted into a metal reinforcing member.

FIG. 5 is an explanatory view showing a state in which a valve body is inserted into a metal reinforcing member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve 2 Valve main body 3 Valve body 32 Cut surface 4 Metal reinforcing material 4a Straight pipe part 4b Central part 41 Punching hole 42 Stem part insertion hole 43 Valve body insertion hole 45 Short side 46 Long side 5 Seat ring

Claims (2)

[Claims] 1. A valve made of a synthetic resin in which a valve body is inserted into a valve body, and a stem hole of the valve body is provided at an upper part thereof.
A valve, characterized in that a valve body insertion hole is opened at a bottom portion, and a metal reinforcing material whose center portion is enlarged by punching is embedded in a synthetic resin of the valve body. 2. A valve body insertion hole which is opened at the bottom of the metal reinforcing member has a rectangular shape having a long side and a short side, and the long side is formed in a pipe axis direction. Item 6. The valve according to Item 1.