JP3003108B2 - Fluid controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid controller, and a purpose of the present invention is to easily observe the open / closed state of the controller visually and to sterilize a line with formalin or steam when the controller is started up. It is another object of the present invention to provide a fluid controller in which these fluids do not enter the controller and cause dew condensation or the like in the controller.

[0002]

2. Description of the Related Art When shutting off chemicals such as acids, diaphragm valves are often used as fluid controllers. As the diaphragm valve, there are various types such as a manual type and a pneumatic type, and as a manual type diaphragm valve, for example, as shown in FIG.
(A) and stem (B), diaphragm (C), bonnet (D)
, A compressor (E), a handle (F), and an indicator (G). In the diaphragm valve having such a configuration, when the handle (F) is rotated, the handle (F)
The stem (B) is moved up and down by the rotation of. This stem
The compressor (E) fixed to the lower end of the stem (B) moves up and down due to the vertical movement of (B), and this compressor
The diaphragm (C) is pressed against or separated from the valve body (A) by the vertical movement of (E).

[0003] In this manual diaphragm valve, a color that is easily noticeable in the gap between the bonnet (D) and the handle (F) is used as a guide for visually checking the open / closed state of the diaphragm (C).
For example, there is an indicator provided with an indicator (G) colored yellow or the like. The indicator (G) is provided on the outer peripheral surface of the bonnet (D) via the locking pin (G ₁ ), and is turned on and off by turning the handle (F) when the valve is opened and closed. In other words, the indicator from outside
When (G) is visible, the valve body (A) is open, and when the indicator (G) is not visible, the valve body (A) is closed. Also, the visible length of the indicator (G) is proportional to the open state of the valve body (A), and the open / closed state of the valve body (A) should be detected based on the amount of the indicator (G) that can be seen or hidden. Can be.

[0004]

As described above, the indicator (G) is a convenient member that allows the operator to easily visually recognize the open / closed state of the valve body (A) when operating the valve. The following problems existed with the attached diaphragm. That is, since a gap is formed between the handle (F) and the indicator (G), for example, in a line sterilization operation using formalin or steam at the time of starting the line, formalin, steam, or the like is temporarily contained in the gap. Invaded, and the formalin or vapor that has entered may condense in the gaps and cause corrosion, rust and the like.

[0005]

According to the present invention, there is provided a valve body having an inlet flow path, an outlet flow path, and a seal seat located between these two flow paths, and a position opposed to the seal seat of the valve body. A diaphragm fixed to the seal seat via a clamping member, and an operating mechanism for pressing or separating the diaphragm from or against the seal seat. The operating mechanism is movable in the axial direction by rotation of a valve opening / closing handle. Is provided with a locking hole on the outer peripheral surface, and an indicator is provided in a gap between the holding member and the valve opening / closing handle. The indicator is provided on the inner circumferential surface with the locking hole engaged with the locking hole of the holding member. The above-described conventional fluid controller is provided by providing a protrusion, and a protrusion-shaped spacer is provided on the outer peripheral surface of the indicator at the same position as the locking protrusion. Object of the present invention to eliminate altogether.

[0006]

[Function] The open / closed state of the valve by the diaphragm can be easily detected by the indicator, and it is possible to reliably prevent such fluids and other foreign substances from entering the controller during formalin or steam sterilization work at line startup. As a result, there is no occurrence of corrosion, rust, etc. in the controller.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the fluid controller according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional explanatory view showing one embodiment of a fluid controller (1) of the present invention. In FIG. 1, (2) is a valve main body, and the valve main body (2) has an inlet flow path (21). Outlet channel (22) and seal seat (23) located between these two channels
Are formed. (3) is a compressor, (4) is a stem, (5) is a bonnet as a holding member, (6) is a valve opening / closing handle, (7) is a diaphragm, and (8) is an indicator.

In the fluid controller (1) having such a structure, the stem (4) is moved up and down by rotating the valve opening / closing handle (6) as in the above-mentioned conventional one. The vertical movement of the stem (4) causes the compressor (3) fixed to the lower end of the stem (4) to move up and down, and the vertical movement of the compressor (3) causes the diaphragm (7) to move the valve body (2).
Is pressed against or separated from the seal seat (23).

In the fluid controller (1) of the present invention, an indicator (8) is provided in a gap between the bonnet (5) and the valve opening / closing handle (6). Bonnet (5)
Has an engaging hole (51) formed on the outer peripheral surface, and the indicator (8) has an engaging projection (81) provided on the inner peripheral surface to be engaged with the engaging hole (51). The indicator (8) is provided in the space between the bonnet (5) and the valve opening / closing handle (6) on the outer peripheral side through the engagement between the locking projection (81) and the locking hole (51). Further, in the present invention, the indicator
On the outer peripheral surface of (8), that is, on the peripheral surface on the valve opening / closing handle (6) side, a projecting spacer (82) is provided at the same position as the locking projection (81).

The reason why the projection spacer (82) is provided at the same position as the locking projection (81) is that the valve opening / closing handle (6)
The protruding spacer (82) pressed by the locking protrusion (81)
Also press the locking force of the locking protrusion (81) and the protrusion-shaped spacer
This is because the sealing force of (82) exhibits a synergistic effect. Further, in the present invention, the thickness of the projection spacer (82) is provided to be smaller than the thickness of the locking projection (81). The reason for this is that if the thickness of the locking projection (81) is too small, it will easily come off the bonnet (5), so a certain thickness is required. This is because it is necessary to make the thickness of the handle (6) as small as possible because it may hinder the rotation of the handle (6). Further, it is necessary that the protruding spacer (82) is provided with a length that maintains tightness with the valve opening / closing handle (6).

As described above, since the indicator (8) is provided without obstructing the rotation of the valve opening / closing handle (6) and maintaining the tightness with the valve opening / closing handle (6), the indicator (8) can be easily operated. The opening / closing operation can be performed, and it also serves to prevent steam and other foreign substances from entering the gap between the valve opening / closing handle (6).

The indicator (8) is provided in a color such as yellow which is conspicuous. By coloring the indicator (8) in this way, the visibility from the outside becomes clearer, and the tightness of the diaphragm (7) can be easily detected by the visibility of the colored indicator (8).

[0013]

As described in detail above, the present invention is directed to a valve body having an inlet flow path, an outlet flow path, and a seal seat located between these two flow paths, and opposing the seal seat of the valve main body. And a control mechanism for pressing or separating the diaphragm from or against the seal seat.The control mechanism is configured to be able to advance and retreat in the axial direction by rotating a valve opening / closing handle. The holding member has a locking hole formed on the outer peripheral surface, and an indicator is provided in a gap between the holding member and the valve opening / closing handle, and the indicator is engaged with the locking hole of the holding member on the inner circumferential surface. The fluid controller is provided with a locking projection and a projection-shaped spacer is provided on the outer peripheral surface of the indicator at the same position as the locking projection. The opening and closing state of the valve body can be easily visually inspected, and the fluid can be reliably blocked from entering the gap between the indicator and the valve opening and closing handle due to sterilization of formalin and steam when the line is started. It works.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing one embodiment of a fluid controller according to the present invention.

FIG. 2 is an explanatory sectional view showing one embodiment of a conventional fluid controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid controller 2 Valve body 21 Inlet flow path 22 Outlet flow path 23 Seal seat 3 Compressor 4 Stem 5 Clamping member (bonnet) 51 Locking hole 6 Valve opening / closing handle 7 Diaphragm 8 Indicator 81 Locking projection 82 Projecting spacer

Claims (1)

(57) [Claims] 1. A valve body having an inlet flow path, an outlet flow path, and a seal seat located between these two flow paths, and fixed at a position facing the seal seat of the valve body via a sandwiching member. And a control mechanism for pressing or separating the diaphragm from or against the seal seat. The control mechanism is movable in the axial direction by turning a valve opening / closing handle. Is formed, and an indicator is provided in a gap between the holding member and the valve opening / closing handle. The indicator has an inner peripheral surface provided with a locking projection which is engaged with a locking hole of the holding member. A fluid controller, wherein a projection-shaped spacer is provided on the outer peripheral surface at the same position as the locking projection.