JPH0440050Y2

JPH0440050Y2 -

Info

Publication number: JPH0440050Y2
Application number: JP1986149008U
Authority: JP
Priority date: 1986-09-29
Filing date: 1986-09-29
Publication date: 1992-09-18
Also published as: JPS6353962U

Description

【考案の詳細な説明】産業上の利用分野本考案は流体の流れを多方向に切換えたり、閉
止をする液体、粉体等、摩耗抵抗の大きい流体の
輸送配管に使用される多方向切換弁に関するもの
である。[Detailed description of the invention] Industrial application field This invention is a multi-directional switching valve used in transportation piping for fluids with high wear resistance, such as liquids and powders, which switches or closes the flow of fluid in multiple directions. It is related to.

従来の技術従来、多方向切換弁については弁箱の入口及び
出口の流路、その途中の流路、弁体の流路はそれ
ぞれ同一寸法で製造されていた。BACKGROUND ART Conventionally, in a multi-way switching valve, the inlet and outlet passages of the valve body, the intermediate passages therebetween, and the passages of the valve body have been manufactured to have the same dimensions.

考案が解決しようとする問題点上記のような従来例において、流路がすべて同
一径であると、粉体輸送に使つた場合、流路の曲
り角、特に弁体の中央部分では流路の曲り角度が
大きく、粉体が流路壁に激突しこの部分が摩耗し
たり、摩耗が激しくなつて穴があくという欠点が
あつた。Problems to be solved by the invention In the conventional example described above, if all the channels have the same diameter, when used for powder transportation, the bending angle of the channel, especially in the center of the valve body The problem was that the powder collided with the channel wall, causing wear in this area, and the wear became so severe that holes were formed.

本考案は上記問題点を解決すると共に、流体に
よる抵抗が大きい弁体内の流路の中央部分では流
路面積を徐々に大きくし流速を減じて摩耗抵抗の
小さい多方向切換弁を提供することを目的として
いる。 The present invention solves the above problems and provides a multi-way switching valve with low wear resistance by gradually increasing the flow passage area and reducing the flow velocity in the central part of the flow passage in the valve body where the resistance due to fluid is large. The purpose is

問題点を解決するための手段上記目的達成のため本考案では、曲つた流路を
持つ弁体を内装し液体、粉体等摩耗抵抗の大きい
流体の輸送配管に使用される多方向切換弁におい
て、弁箱及び弁体内の流路中央で曲り角度の大き
い屈曲部の流路面積を弁箱の両端面の流路面積よ
りも大きくし、弁箱の一方端面から徐々に大きく
して弁体の中央部を経て、他方端面へ徐々に小さ
くした平滑面として弁箱の両端面へ連通するよう
にした多方向切換弁とした。Means for Solving the Problems In order to achieve the above object, the present invention provides a multi-way switching valve that is equipped with a valve body having a curved flow path and is used for transportation piping for fluids with high wear resistance such as liquids and powders. , the flow path area of the bent part with a large bending angle at the center of the flow path in the valve box and valve body is made larger than the flow path area on both end faces of the valve box, and gradually increases from one end face of the valve body to form a valve body. This is a multi-way switching valve that communicates with both end surfaces of the valve body as a smooth surface that gradually becomes smaller from the center portion to the other end surface.

作用本考案では弁箱の両端面の流路面積よりも、弁
箱及び弁体内の流路中央で曲り角度の大きい屈曲
部の流路面積を大きくしたので、この部分の流体
の流速が弁箱の端面に較べて小さくなつた。従つ
て、粉体のような流体の場合、流路壁に激突する
力は流速が小さくなるほど小さくなつて流路壁の
摩耗から保護されることになつた。そして、弁箱
の一方端面から徐々に大きくして弁体の中央部を
経て、他方端面へ徐々に小さくした平滑面として
弁箱の両端面と連通するようにしたので、流体の
流れは滑らかとなつて、摩耗抵抗が減少するよう
になつている。Effect In this invention, the flow path area of the bent part with a large bending angle at the center of the flow path in the valve body and the valve body is made larger than the flow path area on both end faces of the valve body, so the flow velocity of the fluid in this part is It became smaller compared to the edge of the box. Therefore, in the case of a fluid such as powder, the force with which it collides with the channel wall becomes smaller as the flow velocity decreases, and the channel wall is protected from wear. The fluid flow is smooth because the smooth surface gradually increases from one end of the valve body, passes through the center of the valve body, and gradually decreases to the other end. As a result, wear resistance is reduced.

実施例以下、図面に示した実施例を説明する。１，
２，３は流体出入口、４は多方向切換弁の弁体、
５は弁体の端面の開口部である。６は弁箱の端面
である。７，８は屈曲部を示す。弁体４の回転に
よつて流体出入口１，２，３の切換えをする。Ａ
−Ａ線による断面、Ｂ−Ｂ線による断面及びＣ−
Ｃ線による断面は真円形である。弁箱の流体出入
口１，２，３の端面Ｃ−Ｃ線による流路面積と比
較して曲り角度の大きい屈曲部７，８の流路面積
は滑らかで徐々に大きくなる平滑面とした。尚、
流路断面の形状は真円に限らず矩形状でもよい。Embodiments Hereinafter, embodiments shown in the drawings will be described. 1,
2 and 3 are fluid inlets and outlets, 4 is a valve body of a multi-way switching valve,
5 is an opening in the end face of the valve body. 6 is the end face of the valve box. 7 and 8 indicate bent portions. The fluid ports 1, 2, and 3 are switched by rotating the valve body 4. A
- Cross section along line A, cross section along line B-B, and C-
The cross section taken along line C is a perfect circle. The flow path area of the bent portions 7 and 8, which have a larger bending angle than the flow path area taken by the end face C-C line of the fluid inlet/outlet ports 1, 2, and 3 of the valve box, is a smooth surface that gradually increases. still,
The cross-sectional shape of the flow path is not limited to a perfect circle, but may be rectangular.

同一の流量を流す場合、流速は流路面積が大き
くなる程小さくなる。流速が小さくなることによ
り、弁箱の流体出入口１，２，３及び弁体４内の
壁面に生じる流体による摩耗も減少することによ
り、壁面の保護ができるようになつた。 When flowing the same flow rate, the flow rate becomes smaller as the flow path area becomes larger. By reducing the flow velocity, the wear caused by the fluid on the walls of the fluid inlets and outlets 1, 2, and 3 of the valve body and the inside of the valve body 4 is also reduced, making it possible to protect the walls.

考案の効果本考案は上記のように弁箱及び弁体内の中央で
曲り角度の大きい屈曲部の流路面積を弁箱の両端
面の流路面積よりも大きくしたことにより、流体
の流速を小さくし、平滑面とすることにより摩耗
抵抗も小さくなつた。従つて、弁箱及び弁体の流
路壁の保護ができ、長期間の使用に耐える多方向
切換弁を提供することができた。Effects of the invention As mentioned above, the present invention reduces the flow velocity of the fluid by making the flow passage area of the bent part with a large bending angle at the center of the valve box and valve body larger than the flow passage area of both end faces of the valve box. However, by making the surface smooth, the wear resistance was also reduced. Therefore, it was possible to protect the valve box and the flow path wall of the valve body, and to provide a multi-way switching valve that can be used for a long period of time.

[Brief explanation of the drawing]

第１図は一実施例として示した三方切換弁の断
面図、第２図イ，ロ，ハは第１図Ａ−Ａ線、Ｂ−
Ｂ線及びＣ−Ｃ線による流路断面図、第３図は第
１図と同じ三方切換弁の断面図である。４……弁体、７，８……屈曲部。 Fig. 1 is a sectional view of a three-way switching valve shown as an example, and Fig. 2 A, B, and C are lines A-A and B-A in Fig. 1.
FIG. 3 is a cross-sectional view of the flow path taken along line B and line C-C, and FIG. 3 is a cross-sectional view of the same three-way switching valve as FIG. 1. 4... Valve body, 7, 8... Bent portion.

Claims

[Scope of utility model registration request]

In a multi-way switching valve that has a valve body with a curved flow path and is used for transportation piping for fluids with high abrasion resistance such as liquids and powders, a bent part with a large bending angle at the center of the flow path in the valve body and valve body. The flow path area of the valve body is made larger than the flow path area of both end faces of the valve body, and the valve body is made of a smooth surface that gradually increases from one end face of the valve body, passes through the center of the valve body, and gradually decreases to the other end face. A multi-way switching valve characterized by communicating with both end faces of the valve.