JPH06272771A - Fluid controller - Google Patents

Abstract

PURPOSE:To prevent the fluid from leaking outside even when the part of a diaphragm in contact with the opening edge part of a valve casing is deteriorated by forming endless sealing projecting parts to seal the flow passage at the inlet and the outlet on the valve body in contact with the circumferential side surface of the holding member. CONSTITUTION:A diaphragm 6 is fixed in a holding manner to the clearance between a valve casing 19 and a valve body 2 through a holding member 7, and endless sealing projections 11, 11 formed on the valve casing 19 are brought into contact with the circumferential side surface 10 of the holding member 7. Even when the part of the diaphragm 6 in contact with an opening edge part 19 of the opening part 5 formed in the valve casing 19 is deteriorated while an inlet flow passage 3 and an outlet flow passage 4 are repeatedly opened/closed through the diaphragm 6, the inlet flow passage 3 and the outlet flow passage 4 can be sealed by the sealing projections 11, 11, and the fluid flowing in the inlet flow passage 3 and the outlet flow passage 4 is prevented from leaking.

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 an object of the invention is to control a fluid flowing through an inlet flow passage and an outlet flow passage even when a portion of a diaphragm which is in contact with an opening edge of a valve box is ruptured. It 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 operating mechanism (G) for expanding and contracting the diaphragm (F), and the diaphragm (F) is arranged on an opening (H) formed at a required position of the valve box (E). In addition, the holding member (B) provided on the lower portion of the valve body (J) and the valve box (E) are fixed in a sandwiched state.

[0003]

However, the above-described conventional fluid controller (A) has the following problems. When the inlet flow channel (C) and the outlet flow channel (D) are opened and closed via the diaphragm (F), this diaphragm (F)
Of the opening (H) formed in the valve box (E) is in contact with the opening edge (I), so that the inlet passage (C) and the outlet passage (D) are connected to the diaphragm. While repeatedly opening and closing through (F), the portion of the diaphragm (F) that contacts the opening edge (I) of the opening (H) formed in the valve box (E) is ruptured. . The inlet flow passage (C) and the outlet flow passage (D) are formed by rupturing the portion of the diaphragm (F) that is in contact with the opening edge (I) of the opening (H) formed in the valve box (E). There was a possibility that the fluid flowing through and leaked from the cracked portion to the outside.

The present invention has been made in view of the above-mentioned conventional circumstances, and flows through the inlet flow path and the outlet flow path even when the portion of the diaphragm that contacts the opening edge of the valve box is fractured. I have continued my earnest research on a fluid controller in which the fluid does not leak to the outside.

[0005]

That is, the present invention comprises a valve body having an inlet passage and an outlet passage and a valve body, and is sandwiched in a gap between the valve body and the valve body via a sandwiching member. A fluid controller comprising a diaphragm fixed in a state and an operation mechanism for expanding and contracting the diaphragm, wherein the valve body is in contact with a peripheral side surface of the sandwiching member and inside the inlet passage and the outlet passage. It is an object of the present invention to solve the above-mentioned problems by providing a fluid controller characterized in that an endless sealing protrusion for sealing the above is formed.

[0006]

The diaphragm is fixed in a sandwiched state in the gap between the valve box and the valve body via the sandwiching member, and the endless sealing projection formed on the valve body is brought into contact with the peripheral side surface of the sandwiching member. Let Therefore, when the inlet flow passage and the outlet flow passage are repeatedly opened and closed through the diaphragm, the portion of the diaphragm that is in contact with the opening edge of the opening formed in the valve box is torn. However, the inside of the inlet channel and the outlet channel can be sealed by the sealing protrusion, and the fluid flowing through the inlet channel and the outlet channel does not leak to the outside.

[0007]

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 sectional explanatory view showing an embodiment of a fluid controller according to the present invention, and FIG. 2 is a sectional explanatory view showing a sandwiched portion of the diaphragm shown in FIG.

(1) is a fluid controller, and this fluid controller (1) has a valve box (19), a valve body (2), a diaphragm (6), a holding member (7), and a compressor. (12), stem (13), actuator cap (8), and spring (9).

The valve box (19) has an inlet passage (3) and an outlet passage (4), and a seal seat (13) located between the inlet passage (3) and the outlet passage (4). Is provided, and an opening (5) is formed at a required position of the valve box (19). Further, as shown in FIG. 2, the valve box (19) is provided with endless sealing projections (11) (11) which come into contact with the peripheral side surface (10) of the holding member (7).

A square sheet-shaped diaphragm (6) is disposed at an opening (5) formed at a required position of the valve box (19). In the present invention, the diaphragm (6) is not particularly limited, and conventionally known natural rubber, nitrile rubber, styrene rubber, butadiene / isobutylene synthetic rubber, polychloroprene which are excellent in heat resistance, cold resistance, flexibility, corrosiveness and the like. Rubber, butyl rubber, fluororubber, silicone rubber, polyurethane rubber or the like or synthetic resin such as polytetrafluoroethylene (PTFE) is preferably used.

The diaphragm (6) is fixed in the gap between the valve box (19) and the valve body (2) via the sandwiching member (7). At this time, the sealing projections (11) (11) formed on the valve box (19) are brought into contact with the peripheral side surface (10) of the holding member (7). In the illustrated example, the sealing protrusions (11) (11) formed on the valve box (19) are in contact with only the ends of the peripheral side surface (10) of the holding member (7), The protrusions (11) (11) may be brought into contact with the entire peripheral side surface (10) of the holding member (7).

The compressor (12) is axially connected to a connecting bolt (18), and the connecting bolt (1)
8) is a buried portion (1) at the center of the diaphragm (6).
5) It is buried inside.

The usage state of the fluid controller (1) thus constructed 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 clamped by the tip of the clamping member (7), and is pressed against the seal seat (13) of the valve box (19) so that the inlet flow passage (3) and the outlet flow passage (4).
And are closed. Further, when air is introduced from the inlet port (16) through the air passage (17), the compressor (1) fixed below the stem (14).
2) is raised and the diaphragm (6) is moved to the seal seat (1
The inlet channel (3) and the outlet channel (4) are opened apart from each other by 3). 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 / closing of the inlet flow path (3) and the outlet flow path (4) may be performed by a manual open / close type diaphragm valve.

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

Thus, the valve box (19) and the valve body (2)
The diaphragm (6) is fixed in the state of being sandwiched by the sandwiching member (7) in the gap between the two, and the endless sealing protrusions (11) (11) formed in the valve box (19) are sandwiched. Since it is made to contact the peripheral side surface (10) of the member (7),
The opening formed in the valve box (19) of the diaphragm (6) while the inlet flow path (3) and the outlet flow path (4) are repeatedly opened and closed through the diaphragm (6). Even when the portion of (5) that contacts the opening edge portion (19) is torn, the sealing projections (11) and (11) cause the inside of the inlet passage (3) and the outlet passage (4) to flow. It can be sealed, and the fluid flowing through the inlet channel (3) and the outlet channel (4) does not leak outside.

[0016]

As described above in detail, the present invention comprises a valve body having an inlet passage and an outlet passage and a valve body, and is sandwiched in the gap between the valve body and the valve body via a sandwiching member. A fluid controller comprising a diaphragm fixed in a state and an operation mechanism for expanding and contracting the diaphragm, wherein the valve body is in contact with a peripheral side surface of the sandwiching member and inside the inlet passage and the outlet passage. Since the fluid controller is characterized in that an endless sealing protrusion that seals is formed, it has the following effects. That is, the diaphragm is fixed in a sandwiched state in the gap between the valve box and the valve body via the sandwiching member, and the endless sealing projection formed on the valve box is brought into contact with the peripheral side surface of the sandwiching member. Therefore, while repeatedly opening and closing the inlet flow path and the outlet flow path through the diaphragm,
Even when the portion of the diaphragm that is in contact with the opening edge of the opening formed in the valve box is ruptured, the inlet passage and the outlet passage can be sealed by the sealing protrusion. The fluid flowing through the inlet passage and the outlet passage does not leak outside.

[Brief description of drawings]

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

2 is a cross-sectional explanatory view showing a sandwiched portion of the diaphragm shown in FIG.

FIG. 3 is an explanatory sectional view showing a conventional fluid controller.

[Explanation of symbols]

 1 Fluid Controller 2 Valve Main Body 3 Inlet Flow Path 4 Outlet Flow Path 6 Diaphragm 7 Clamping Member 10 Circumferential Side Surface 11 Sealing Protrusion 19 Valve Box

Claims (1)

[Claims] 1. A diaphragm comprising a valve box having an inlet channel and an outlet channel and a valve body, the diaphragm being fixed in a sandwiched state via a sandwiching member in a gap between the valve box and the valve body, A fluid controller comprising an operation mechanism for expanding and contracting the diaphragm, wherein the valve body is in contact with the peripheral side surface of the sandwiching member and seals the inlet passage and the outlet passage in an endless seal. A fluid controller characterized in that a protrusion is formed.