JPH04285373A - Regulating valve - Google Patents

Abstract

PURPOSE:To obtain a regulating valve which can be switched to a desired flow characteristic to be used. CONSTITUTION:An opening 13 communicated with an outlet path 6 and flow openings 14, 15 opened in such a shape as to obtain each different flow characteristic are formed on a valve ball 10. By the rotation of the valve ball 10, an inlet path 5 and the outlet path 6 are communicated with each other through the flow opening 14 and the opening 13 or through the flow opening 15 and the opening 13.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention relates to a control valve for closing or controlling the flow of various fluids in a pipe, and in particular uses a valve ball as the valve body to control the flow of fluid by rotating the valve ball. This relates to a device that can control the flow rate of water.

0002

2. Description of the Related Art Conventionally, a control valve using a valve ball as a valve body is disclosed in, for example, Japanese Utility Model Publication No. 2-15100. This valve casing forms an inlet passage, a valve chamber, and an outlet passage, and a valve ball with a communication hole that communicates the inlet passage and outlet passage is rotatably arranged inside the valve chamber. A valve seat is provided that opens and closes the circulation hole in cooperation with the valve ball, and depending on the rotational position of the valve ball, communicates or blocks the circulation hole with the inlet passage and the outlet passage, thereby controlling the passage of fluid. It is.

0003

[Problem to be solved by the invention] In the above conventional method,
It was not possible to change the flow rate characteristics of the valve, such as the flow rate curve such as equal percentage or linear, or the flow coefficient Cv that determines the maximum capacity. This is because although the flow rate characteristics of the valve are determined by the shape of the flow hole formed in the valve ball, only one flow hole is provided.

[0004] Therefore, the technical problem of the present invention is to obtain a control valve that can be used by switching to desired flow characteristics.

[0005]

[Means for Solving the Problems] The technical means of the present invention taken to solve the above technical problem is to form an inlet passage, a valve chamber, and an outlet passage in a valve casing, and to form a valve in the valve chamber. The ball is rotatably arranged, and the valve ball has an opening facing the outlet passage, and a plurality of communication ports communicating with the opening and facing the inlet passage depending on the rotational position of the valve ball. However, each flow port is formed in a shape that allows desired flow characteristics to be obtained.

[0006]

[Operation] The operation of the above technical means is as follows. Since a plurality of flow ports with desired flow characteristics are formed in the valve ball, each flow port can be made to face the inlet passage in sequence depending on the rotational position of the valve ball. Fluid from the inlet passageway flows from the facing communication ports through the openings and into the outlet passageway. Therefore, valves with different flow characteristics can be obtained depending on the shape of the flow port facing the inlet passage.

[0007]

[Example] An example showing a specific example of the above technical means will be described (see FIG. 1). Valve casing is casing body 1
It consists of an inlet member 2 and an outlet member 3 attached to this with bolts (not shown). The inlet/outlet members 2, 3 have flanges for connecting piping at their outer ends. A cylindrical valve chamber 4 is formed inside the valve casings 1, 2, and 3. Entrance/exit member 2,
3 is formed with an inlet passage 5 and an outlet passage 6 that communicate with the valve chamber 4, respectively, and an annular stepped portion with a cylindrical surface is formed at the inner end thereof.
Annular valve seats 7 and 8 made of synthetic resin or metal are arranged. An annular valve seat 9 is also arranged at a portion of the casing body 1 facing the inlet member 2.

A valve ball 10 is rotatably disposed within the valve chamber 4. The valve ball 10 has a hollow spherical shell shape, and has a groove 12 in the upper part for connecting the valve shaft 11 for rotational operation, and a groove 12 in the lower part for allowing the fluid flowing into the interior from the inlet passage 5 to flow into the outlet passage 6. It has an opening 13 of. Further, two flow ports 14 and 15 are opened in the valve ball 10, one on the opposite side of the paper and the other on the front side. The flow ports 14 and 15 are both shaped to obtain equal percent flow characteristics, and the flow coefficient C of the flow port 14 on the opposite side is
v is small, and the flow coefficient of the flow port 15 on the near side is formed to be large. The opening 13 is formed larger than the flow holes 14 and 15. A packing 16 is interposed between the casing body 1 and the valve stem 11, and a tightening bolt 17 is screwed to maintain airtightness.

The illustrated valve is in a closed state, and by rotating the valve shaft 11 clockwise, the flow port 15 with a large flow coefficient faces the inlet passage 5, and fluid is directed to the outlet passage 6. Let it flow out. On the contrary, when the valve shaft 11 is rotated counterclockwise from the illustrated state, the flow port 14 with a small flow coefficient faces the inlet passage 5 and the fluid flows out to the outlet passage 6.

0010

[Effects of the Invention] The present invention produces the following unique effects. As described above, according to the present invention, by forming a plurality of flow holes in the valve ball that can obtain desired flow characteristics, the valve ball
The flow characteristics can be switched depending on the rotational position of the lever.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the control valve of the invention.

[Explanation of symbols]

1 Casing body 2 Entrance member 3 Exit member 4 Valve chamber 5 Entrance passage 6 Exit passage 7 Annular valve seat 8 Annular valve seat 9 Annular valve seat 10 Valve ball 11 Valve stem 13 Opening 14 Distribution port 15 Distribution port

Claims (1)

[Claims] Claim 1: An inlet passage, a valve chamber, and an outlet passage are formed in a valve casing, a valve ball is rotatably disposed in the valve chamber, and an opening facing the outlet passage is provided in the valve ball. communicates with the opening,
A control valve in which a plurality of flow ports facing an inlet passage are formed depending on the rotational position of a valve ball, and each flow port is formed in a shape that provides desired flow characteristics.