JP3320827B2 - 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 more particularly, to a fluid controller in which a fluid flowing through an inlet flow path and an outlet flow path can be used even when a portion of a diaphragm in contact with an opening edge of a valve box is split. An object of the present invention is to provide a fluid controller that does not leak to the outside.

[0002]

2. Description of the Related Art An example of a conventional fluid controller will be described with reference to FIG. The controller (A) includes a valve box (E) having an inlet channel (C) and an outlet channel (D), a valve body (J),
It comprises a diaphragm (F) and an operation mechanism (G) for expanding and contracting the diaphragm (F), and the diaphragm (F) is disposed on an opening (H) formed at a required position of the valve box (E). And at the same time, it is fixed in a gap between the valve box (E) and the valve body (I) via a holding member (B) provided below the valve box (E). .

[0003]

However, the fluid controller (A) having the above-mentioned conventional structure has the following problems. When the inlet channel (C) and the outlet channel (D) are opened and closed via the diaphragm (F), the diaphragm (F)
Pressure is applied to a portion of the opening (H) formed in the valve box (E) in contact with the opening edge (I), so that the inlet channel (C) and the outlet channel (D) are connected to the diaphragm. While repeatedly opening and closing through (F), the portion of the diaphragm (F) in contact with the opening edge (I) of the opening (H) formed in the valve box (E) breaks. . When the portion of the diaphragm (F) in contact with the opening edge (I) of the opening (H) formed in the valve box (E) is split, the inlet channel (C) and the outlet channel (D) are broken. There is a possibility that the fluid flowing through may leak to the outside from the cracked portion.

The present invention has been made in view of the above-mentioned conventional circumstances, and allows the diaphragm to flow through the inlet flow passage and the outlet flow passage even when the portion of the diaphragm that contacts the opening edge of the valve box is split. We continued our research on a fluid controller that does not leak fluid to the outside.

[0005]

That is, the present invention comprises a valve body having an inlet flow path and an outlet flow path, and a valve body. The valve body is held in a gap between the valve box and the valve body via a holding member. A fluid controller comprising a diaphragm fixed to the diaphragm and an operating mechanism for expanding and contracting the diaphragm, wherein a ridge is formed on a peripheral portion of the diaphragm, and a fitting member made of metal is fitted to the ridge. And the thickness of the diaphragm is made thicker than the width of the fitting member ,
The holding member includes an upper portion of a fitting portion to the ridge.
So that only the part up to the middle of the upper surface of the fitting member is
Fluid controller, and an inlet passage and an outlet passage consists valve casing and a valve body formed by clamping state through a gap the clamping member of the valve body and the valve body, characterized by comprising provided A fluid controller comprising a diaphragm fixed to the diaphragm and an operating mechanism for expanding and contracting the diaphragm, wherein a ridge is formed on a peripheral portion of the diaphragm, and a fitting member made of metal is fitted to the ridge. The thickness of the diaphragm is made thinner than the width of the fitting member, a notch is formed in the holding member in a contact portion with the fitting member, and at least the valve body has A recess is formed in a contact portion with the fitting member, and the holding member is
Middle of the upper surface of the fitting member including the upper part of the fitting portion to the ridge
An object of the present invention is to solve the above-mentioned problem by providing a fluid controller characterized by being provided so as to sandwich only a part up to a part .

[0006]

The diaphragm is fixedly held in the gap between the valve box and the valve body via a sandwiching member, and a ridge is formed on the periphery of the diaphragm. The fitting member is sandwiched between the valve body and the clamping member. Therefore, a portion of the diaphragm that is in contact with the opening edge of the opening formed in the valve box is torn while the inlet channel and the outlet channel are repeatedly opened and closed via the diaphragm. Even so, the inside of the inlet channel and the outlet channel can be sealed by the fitting member, and the fluid flowing through the inlet channel and the outlet channel does not leak to the outside.

In addition, the diaphragm is fixedly held in a gap between the valve box and the valve body via a holding member, and a ridge is formed on a peripheral portion of the diaphragm, and a fitting member is fitted to the ridge. . A notch is formed at the contact portion of the holding member with the fitting member, a recess is formed at the contact portion of the valve box with the fitting member, and the fitting member is sandwiched between the notch and the recess. .
Therefore, a portion of the diaphragm that is in contact with the opening edge of the opening formed in the valve box is torn while the inlet channel and the outlet channel are repeatedly opened and closed via the diaphragm. Even so, the inside of the inlet channel and the outlet channel can be sealed by the fitting member, and the fluid flowing through the inlet channel and the outlet channel does not leak to the outside.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a fluid controller according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional explanatory view showing an embodiment of a fluid controller according to the present invention, FIG. 2 is a cross-sectional explanatory view showing a sandwiched portion of the diaphragm shown in FIG. 1, and FIG. FIG. 4 is an explanatory cross-sectional view showing a sandwiched portion of the diaphragm, which is an embodiment of the present invention. FIG. 4 is an explanatory sectional view showing a state where the sandwiched portion of the diaphragm shown in FIG. 3 is disassembled.

[0009] (1) is a fluid controller. As shown in FIG. 1, the fluid controller (1) includes a valve box (25), a valve body (2), a diaphragm (6), and a compressor ( 1
2), a stem (13), an actuator cap (8), and a spring (9).

The valve box (25) has an inlet channel (3) and an outlet channel (4), and a seal seat (13) located between the inlet channel (3) and the outlet channel (4). An opening (5) is formed at a required position of the valve box (25). A diaphragm (6) in the form of a square sheet is disposed at an opening (5) formed at a required position of the valve box (25). As shown in FIG. 2, a ridge (11) is formed on the periphery of the diaphragm (6), and a fitting member (20) is fitted to the ridge (11).

As the fitting member (20), any material may be appropriately selected and used according to the physical properties and chemical properties of the fluid used, temperature, pressure, purpose of use, and the like.
13Cr steel (SUS403, SUS410, SUS42
1) and 18Cr-8Ni steel (SUS304, SUS30
Stainless steels represented by 4L) and nickel-based alloys are preferably used because they are excellent in mechanical strength and excellent in corrosion resistance, acid resistance, heat resistance and the like, but are not particularly limited. That is, as the fitting member (20), an arbitrary member may be appropriately used according to the purpose of use. For example, when a fluid that needs to be controlled at a low temperature is used,
Austenitic stainless steels, aluminum alloys, nickel alloys, copper alloys, etc., having no low-temperature brittleness can be suitably used. When control at high pressure is required, a metal fitting member (20) having excellent pressure resistance may be used, and there is no particular limitation. The thickness of the diaphragm (6) is greater than the width of the fitting member (20).

The diaphragm (6) is not particularly limited, and includes conventionally known natural rubbers, nitrile rubbers, styrene rubbers having excellent heat resistance, cold resistance, flexibility, corrosiveness and the like.
Rubber or polytetrafluoroethylene (PT) such as butadiene / isobutylene synthetic rubber, polychloroprene rubber, butyl rubber, fluorine rubber, silicone rubber, polyurethane rubber, etc.
A synthetic resin material such as FE) is preferably used.

[0013] A diaphragm (6) and a fitting member (20) disposed at the opening (5) of the valve box (25).
(20) is fixed in a gap between the valve box (25) and the valve body (2) via a holding member (7) provided below the valve box (25).

As shown in FIGS. 3 and 4, a notch (2) is formed at a contact portion of the holding member (21) with the fitting member (20).
2), and a recess (24) is formed in at least a contact portion of the valve box (23) with the fitting member (20),
The notch (22) and the recess (24) fit the fitting member (2).
The diaphragm (6) may be fixed to the gap between the valve box (23) and the valve body (26) via the holding member (21) so as to sandwich the diaphragm (6). In this case, the thickness of the diaphragm (6) may be thinner than the width of the fitting member (20), and the thickness of the diaphragm (6) may be substantially the same as the width of the fitting member (20). good.

The compressor (12) is axially connected to a connecting bolt (18).
The tip of (8) is the embedded part (1) at the center of the diaphragm (6).
It is buried in 5).

The use state of the fluid controller (1) thus configured will be described. When closing the inlet channel (3) and the outlet channel (4), the compressor (12) fixed below the stem (14) is lowered by the spring (9). Then the diaphragm (6)
The peripheral edge of the diaphragm (6) is clamped and pinched by the tip of the pinching member (7), and is pressed against the seal seat (13) of the valve box (25) so that the inlet channel (3) and the outlet channel (4).
And is closed. When air is introduced from the inlet port (16) through the air passage (17), the compressor (1) fixed below the stem (14) is introduced.
2) is raised, and the diaphragm (6) is moved to the seal seat (1).
3) The inlet channel (3) and the outlet channel (4) are opened further apart. The illustrated example shows a state in which the inlet channel (3) and the outlet channel (4) are closed by the fluid controller (1). Further, the opening and closing of the inlet channel (3) and the outlet channel (4) may be performed by a manually opened / closed diaphragm valve.

In this embodiment, the operating mechanism for expanding and contracting the diaphragm (6) is configured as described above. However, the present invention is not limited to this operating mechanism, and other operating mechanisms may be used. good.

Thus, the valve box (25) and the valve body (2)
The diaphragm (6) is fixed in a sandwiched state via a sandwiching member (7) in the gap of (1), and a ridge (11) is formed on the periphery of the diaphragm (6), and fitted to the ridge (11). The member (20) is fitted and the valve box (25) and the holding member (7)
Because the fitting member is sandwiched between the diaphragm (6) and the diaphragm (6), the inlet channel (3) and the outlet channel (4) are repeatedly opened and closed via the diaphragm (6) repeatedly. Even if the portion of the opening (5) formed in the valve box (25) in contact with the opening edge (19) is torn, the fitting member (20) allows the inlet flow path (3). The inside of the outlet channel (4) can be sealed, and the fluid flowing through the inlet channel (3) and the outlet channel (4) does not leak to the outside.

Further, the diaphragm (6) is fixed to the gap between the valve box (23) and the valve body (26) via a holding member (7) in a sandwiched state, and a ridge is formed on the periphery of the diaphragm (6). (11) is formed, a fitting member (20) is fitted to the ridge (11), and a notch (22) is formed in a contact portion of the holding member (21) with the fitting member (20). And a recess (24) is formed in a contact portion of the valve box (23) with the fitting member (20), so that the cutout (22) and the recess (2) are formed.
Since the fitting member (20) is sandwiched in 4), the inlet channel (3) and the outlet channel (4) are connected to the diaphragm (6).
The opening (5) formed in the valve box (23) of the diaphragm (6) while being repeatedly opened and closed via the
Even if the portion in contact with the opening edge portion (19) of the is broken, the inside of the inlet channel (3) and the outlet channel (4) can be sealed by the fitting member (20), The fluid flowing through the inlet channel (3) and the outlet channel (4) does not leak to the outside.

[0020]

As described in detail above, a valve box having an inlet flow path and an outlet flow path and a valve body are fixed in a gap between the valve box and the valve body via a holding member. A fluid controller comprising: a diaphragm formed by a diaphragm; and an operating mechanism for expanding and contracting the diaphragm, wherein a ridge is formed on a peripheral portion of the diaphragm, and a fitting member made of metal is fitted to the ridge. At the same time, the thickness of the diaphragm is made thicker than the width of the fitting member, and the holding member is
Upper surface of the fitting member including the upper part of the fitting portion to the ridge
Since the fluid controller is provided so as to sandwich only a part up to the middle part , the following effects are obtained. That is, the diaphragm is fixed in a sandwiched state in the gap between the valve box and the valve body via a sandwiching member, and a ridge is formed on the periphery of the diaphragm, and a fitting member is fitted to the ridge to fit the valve box. Since the fitting member is sandwiched between the holding member and the holding member, the opening formed in the valve box of the diaphragm while the inlet passage and the outlet passage are repeatedly opened and closed continuously through the diaphragm. Even when the portion in contact with the opening edge of the portion is split, the inside of the inlet channel and the outlet channel can be sealed by the fitting member, and flows through the inlet channel and the outlet channel. No fluid leaks out.

Further, a diaphragm comprising a valve box having an inlet flow path and an outlet flow path and a valve body, and fixed in a gap between the valve box and the valve body via a holding member, A fluid controller comprising an operation mechanism for expanding and contracting a diaphragm, wherein a protrusion is formed on a peripheral portion of the diaphragm, and a fitting member made of metal is fitted on the protrusion, and the thickness of the diaphragm is increased. The thickness is made thinner than the width of the fitting member, a cutout portion is formed in the holding member in a contact portion with the fitting member, and the valve body has at least a contact portion with the fitting member. The holding member includes an upper portion of a fitting portion to the ridge.
Only the part up to the middle of the upper surface of the fitting member is pinched.
Since the fluid controller is provided as described above , the following effects can be obtained. That is, the diaphragm is fixed in a sandwiched state between the valve body and the valve body via a sandwiching member, and a ridge is formed on a peripheral portion of the diaphragm. A notch is formed in a contact portion of the member with the fitting member, a recess is formed in a contact portion of the valve box with the fitting member, and the fitting member is sandwiched between the notch and the recess. Therefore, when the inlet channel and the outlet channel are repeatedly opened and closed via the diaphragm, the portion of the diaphragm that contacts the opening edge of the opening formed in the valve box is torn. Even in this case, the inside of the inlet channel and the outlet channel can be sealed by the fitting member, and the fluid flowing through the inlet channel and the outlet channel does not leak to the outside.

[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 a sandwiched portion of the diaphragm shown in FIG. 1;

FIG. 3 is an explanatory sectional view showing a sandwiched portion of a diaphragm which is another embodiment of the fluid controller according to the present invention.

FIG. 4 is an explanatory sectional view showing a state where a sandwiched portion of the diaphragm shown in FIG. 3 is disassembled.

FIG. 5 is an explanatory sectional view showing a conventional fluid controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid controller 2 Valve main body 3 Inlet flow path 4 Outlet flow path 6 Diaphragm 7 Nipping member 10 Peripheral side surface 11 Ridge 20 Fitting member 21 Nipping member 22 Notch 23 Valve box 24 Recess 25 Valve box 26 Valve body

Claims (3)

(57) [Claims] 1. A diaphragm, comprising: a valve box having an inlet flow path and an outlet flow path; and a valve body, fixed to a gap between the valve box and the valve body in a sandwiched state via a sandwiching member. A fluid controller comprising an operation mechanism for expanding and contracting a diaphragm, wherein a protrusion is formed on a peripheral portion of the diaphragm, and a fitting member made of metal is fitted on the protrusion, and the thickness of the diaphragm is increased. The thickness is made thicker than the width of the fitting member, and the holding member is located above the fitting portion to the ridge.
Only the part up to the middle part of the upper surface of the fitting member including the part
A fluid controller characterized in that it is provided to 2. A diaphragm, comprising a valve box having an inlet flow path and an outlet flow path, and a valve body, fixed to a gap between the valve box and the valve body in a sandwiched state via a sandwiching member; A fluid controller comprising an operation mechanism for expanding and contracting a diaphragm, wherein a protrusion is formed on a peripheral portion of the diaphragm, and a fitting member made of metal is fitted on the protrusion, and the thickness of the diaphragm is increased. The thickness is made thinner than the width of the fitting member, a cutout portion is formed in the holding member in a contact portion with the fitting member, and the valve body has at least a contact portion with the fitting member. A recess is formed in the pinch
The member includes the upper part of the fitting part to the ridge,
It is provided so that only the part up to the middle of the upper surface of the material is sandwiched
Fluid controller characterized by comprising Te. 3. The diaphragm according to claim 2, wherein the thickness of the diaphragm is substantially the same as the width of the fitting member.
The fluid controller according to claim 1.