JP3358754B2 - Highly sealed 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 highly-sealed fluid controller, and an object thereof is to provide a highly-sealed fluid controller capable of permanently sealing an opening of a valve box with a diaphragm. .

[0002]

2. Description of the Related Art As a conventional fluid controller, for example, FIG.
As shown in the figure, a valve box (B) having flow paths (C) and (C) and having an opening (D), and a flow path (C) (C) disposed at the opening (D). ) And a peripheral portion (F) of the diaphragm (E).
(F) via bolts (not shown) or the like, holding portions (G) and (G), an operation mechanism (H) provided on the rear side of the diaphragm (E), and this operation mechanism (H). And a handle portion (I) for vertically moving the handle. Also,
The operating mechanism (H) includes a compressor (J) having at least a fitting portion (K) at an upper portion, and one end fitted to the fitting portion (K) of the compressor (J) and the other end fitted to the handle portion (I). And an installed stem (L). In the fluid controller (A) having such a configuration, when the handle (I) is rotated, the stem (L) connected to the handle (I) moves up and down, and the stem (L) The diaphragm (E) is pressed against or separated from the seal seat (M) of the valve box (B) by the vertical movement of the valve (B) to open or close the flow paths (C) and (C).

[0003]

However, in this fluid controller, the peripheral portion of the diaphragm is made flat, and the peripheral portion of the diaphragm is clamped by a clamping portion with a bolt or the like. There was a problem that it was difficult to pinch in a state, and the opening of the valve box could not be permanently sealed. As a result, there is a possibility that the fluid flowing through the flow path may leak out of the holding portion.

[0004] In view of the above circumstances, the inventor of the present invention has intensively studied a highly sealed fluid controller that can permanently seal the opening of a valve box with a diaphragm.

[0005]

That is, the present invention provides a valve box having a flow path and an opening, a diaphragm disposed at the opening to open and close the flow path, and sandwiching a peripheral edge of the diaphragm. A fluid controller comprising a clamping portion, an operating mechanism provided on the rear side of the diaphragm, and a handle portion for moving the operating mechanism up and down, and a clamping protrusion and a clamping notch are provided at a lower portion of the clamping portion. And the inside of the notch is formed from the boundary with the holding ridge.
An annular concave ridge is provided at a position distant to the side, and an annular convex ridge that is sandwiched in close contact with the concave ridge is provided on the upper surface of the diaphragm peripheral portion, and the one of the lower surface is provided with the one annular ridge. At the position opposed to the ridge, there are provided two annular ridges which are pressed against the valve box to seal the opening, and the peripheral portion of the diaphragm is a thin portion, and the thin portion is a pinching ridge. The thick part of the diaphragm is clamped and fixed by the clamping notch, and the periphery of the thin part is located inside the periphery of the clamping protrusion. Related to a fluid controller.

[0006]

An annular recess is provided in the holding notch of the holding portion, the peripheral portion of the diaphragm is made thin, and an annular convex portion is held on the upper surface of the diaphragm in close contact with the recess. A ridge is provided, and two annular ridges are provided on the lower surface of the lower surface opposite to the one ridge so as to be pressed against the valve box to seal the opening. Therefore, the diaphragm can be easily clamped in a crimped state, and the fluid flowing through the flow path can be prevented from leaking from the clamped portion to the outside. In addition, a clamping ridge and a clamping notch are provided at a lower portion of the clamping portion, a peripheral portion of the diaphragm is formed as a thin portion, the thin portion is clamped by the clamping ridge, and a thick portion of the diaphragm is clamped and cut. And fix it by tightening. Therefore, the diaphragm can be easily and firmly fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a highly sealed fluid controller according to the present invention will be described below with reference to the drawings. 1 is a schematic explanatory view showing a highly sealed fluid controller according to one embodiment of the present invention, FIG. 2 is a partially enlarged view showing a sandwiching portion of the diaphragm shown in FIG. 1, FIG. 3 is a plan view showing the diaphragm, FIG.
FIG. 4 is a sectional view of the diaphragm shown in FIG. 3.

[0008] (1) is a fluid controller. As shown in FIG. 1, the fluid controller (1) has a valve box (2), clamping portions (6) (6), and a diaphragm (3). And an operating mechanism (4), and a handle (5) for moving the operating mechanism (4) up and down. The valve box (2) is provided with flow paths (7) and (7) through which fluid flows, an opening (8), and a seal seat (9) for stacking the flow paths (7) and (7). As shown in FIGS. 1 and 2, a thin portion (10) of a diaphragm (3) to be described later is located below the holding portions (6) and (6).
Nipping protrusions (11) and (11) for holding the (10) and nipping notches (13) and (13) for holding the thick portions (12) and (12) of the periphery of the diaphragm (3) are provided. ing. In addition, the holding notches (1) of the holding portions (6), (6)
3) and (13) are provided with annular concave stripes (14) and (14).

As shown in FIGS. 3 and 4, on the upper surface of the peripheral portion of the diaphragm (3), concave strips (14) provided in the holding notches (13) and (13) of the holding portions (6) and (6). ) (1
4) One annular ridge (15) held in close contact with (4)
(15) is provided. At the position on the lower surface of the periphery of the diaphragm (3) facing the one ridge (15), (15), an annular two ridges which are pressed against the valve box (2) to seal the opening (8). (16) (16) is provided. The peripheral portion of the diaphragm (3) is a thin portion (10) as shown in FIG. 4, and the thin portion (10) is formed.
(10) is clamped by the clamping ridges (11) and (11), and the thick portions (12) and (12) of the diaphragm (3) are clamped by the clamping notches (13) and (13) to form bolts (not shown). Z)
Etc.

Reference numerals (22), (22),... Shown in FIG. 3 denote insertion holes through which bolts and the like are inserted when the diaphragm (3) is tightened and fixed. Further, as shown in FIG. 3, one ridge (15) provided on a peripheral portion of the upper surface of the diaphragm (3).
At the substantially central part in (15), the cross-sectional ridges (2) which are in close contact with the flow passages (7) (7) along the seal seat (9) when closed.
It is good to provide 1). By providing the ridge (21), when the diaphragm (3) is pressed against the seal seat (9), the ridge (21) is pressed against the seal seat (9) and the flow paths (7) and (7) are pressed. ) Can be reliably blocked.

The material of the diaphragm (3) is not particularly limited, and conventionally known natural rubbers, nitrile rubbers, styrene rubbers, butadiene / isobutylene synthetic rubbers which are excellent in heat resistance, cold resistance, flexibility, corrosiveness, etc. Polychloroprene rubber, butyl rubber, fluorine rubber, silicone rubber,
Those made of rubber such as polyurethane rubber or synthetic resin such as polytetrafluoroethylene (PTFE) are preferably used. Note that a wire (not shown) for reinforcing the diaphragm (3) may be embedded in the diaphragm (3).

As shown in FIG. 1, the operating mechanism (4) comprises at least a compressor (17) and a stem (18). The compressor (17) is made of aluminum, stainless steel, brass, iron or the like. The compressor (17) is provided on the back surface of the diaphragm (3), and a fitting portion (19) for fitting the stem (18) is provided at an upper portion of the compressor (17). At the lower part of the stem (18), a fitting member (2) fitted into the fitting portion (19) of the compressor (17).
0) is provided, and the upper portion of the stem (18) is attached to the handle portion (5).

The use state of the fluid controller (1) thus configured will be described with reference to FIG. When closing the flow paths (7) and (7), the handle part (5) is rotated. Then, the rotation of the handle portion (5) lowers the stem (18) and lowers the compressor (17). When the compressor (17) descends, the compressor (17) presses the diaphragm (3). When the diaphragm (3) is pressed by the compressor (11), the seal seat (9) of the valve box (2) is pressed.
The diaphragm (3) is pressed to close the flow paths (7) and (7).

To open the flow paths (7) and (7), the handle portion (5) is rotated in a direction opposite to the closing operation of the flow paths (7) and (7). Then, the rotation of the handle portion (5) raises the stem (18) and raises the compressor (17). When the compressor (17) rises, the compressor (18) raises the diaphragm (3). When the diaphragm (3) is raised by the compressor (17), the valve box (2)
Diaphragm (3) pressed against the seal seat (9)
Are separated and the flow paths (7) and (7) are opened.

As described above, the annular notches (14) and (14) are formed in the holding notches (13) and (13) of the holding portions (6) and (6).
And a peripheral portion of the diaphragm (3) is thinned (10).
(10), and a pair of annular ridges (15) and (15) which are held in close contact with the concave ridges (14) and (14) are provided on the upper surface of the periphery of the diaphragm (3), Two annular ridges (16) and (16) which are pressed against the valve box (2) and seal the opening (8) are provided at positions opposed to the one ridges (15) and (15). Therefore, the diaphragm (3) can be easily clamped in a crimped state, and the opening (8) of the valve box (2) can be permanently sealed. Accordingly, it is possible to prevent the fluid flowing through the flow paths (7) (7) from leaking from the holding portion to the outside. Further, the holding ridges (1) are provided below the holding portions (6) and (6).
1) and (11) and sandwich notches (13) and (13), and the periphery of the diaphragm (3) is thinned (1).
0) and (10), the thin portions (10) and (10) are sandwiched by the sandwiching ridges (11) and (11), and the thick portions (12) and (12) of the diaphragm (3) are sandwiched by notches ( 1
3) Since it was clamped and fixed in (13),
The diaphragm (3) can be easily and firmly fixed.

[0016]

As described above, the present invention relates to a valve box having a flow path and an opening, a diaphragm disposed at the opening to open and close the flow path, and a peripheral portion of the diaphragm. A fluid controller comprising a clamping portion to be clamped, an operation mechanism provided on the back side of the diaphragm, and a handle portion for moving the operation mechanism up and down, and a clamping protrusion and a clamping notch at a lower portion of the clamping portion. Is provided inside the holding notch, from the boundary with the holding protrusion.
An annular concave ridge is provided at a position apart from the ridge, and an annular convex ridge that is sandwiched in close contact with the concave ridge is provided on the upper surface of the diaphragm peripheral portion, and the one convex on the lower surface is provided. At the position opposed to the ridge, there are provided two annular ridges which are pressed against the valve box to seal the opening, and the peripheral portion of the diaphragm is a thin portion, and the thin portion is a clamping ridge. The thick portion of the diaphragm is sandwiched and clamped and fixed by the notch notch, and the periphery of the thin portion is located inside the periphery of the clamping protrusion. Since it is a fluid controller, the following effects can be obtained.

That is, an annular concave streak is provided in the holding notch of the holding portion, the peripheral portion of the diaphragm is made thin, and an annular one is held on the upper surface of the diaphragm in close contact with the concave streak. The convex ridges are provided and the annular lower ridges which are pressure-bonded to the valve box and seal the opening are provided at positions opposed to the one convex ridge on the lower surface, so that the diaphragm can be easily crimped. It can be clamped and the valve box opening can be permanently sealed. Therefore, it is possible to prevent the fluid flowing through the flow path from leaking from the holding portion to the outside. In addition, a clamping ridge and a clamping notch are provided at a lower portion of the clamping portion, a peripheral portion of the diaphragm is formed as a thin portion, the thin portion is clamped by the clamping ridge, and a thick portion of the diaphragm is clamped and cut. , The diaphragm can be easily and firmly tightened and fixed.

[Brief description of the drawings]

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

FIG. 2 is a partially enlarged view showing a sandwiching portion of the diaphragm shown in FIG.

FIG. 3 is a plan view showing a diaphragm.

FIG. 4 is a sectional view of the diaphragm shown in FIG. 3;

FIG. 5 is a schematic configuration diagram showing a conventional fluid controller.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fluid controller 2 Valve box 3 Diaphragm 4 Operating mechanism 5 Handle part 6 Holding part 7 Flow path 8 Opening 10 Thin part 11 Holding protruding part 12 Thick part 13 Holding notch part 14 Convex part 15 One convex part 16 2 Ridge

Continuation of the front page (56) References JP-A-2-195082 (JP, A) JP-A-5-126265 (JP, A) Japanese Utility Model Showa 47-34431 (JP, U) JP-B-60-14232 (JP) , B1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16K ^7/ 12-7/ ¹⁷

Claims (1)

(57) [Claims] 1. A valve box having a flow path and an opening, a diaphragm disposed at the opening to open and close the flow path, a holding portion for holding a peripheral edge of the diaphragm, and a rear side of the diaphragm. A fluid controller comprising an operating mechanism provided and a handle for moving the operating mechanism up and down, wherein a gripping ridge and a gripping notch are provided at a lower portion of the gripping part, and the gripping notch has The pinching ridge
An annular concave ridge is provided at a position inward from the boundary with the portion, and an annular convex ridge that is sandwiched in close contact with the concave ridge is provided on the upper surface of the peripheral edge of the diaphragm. At the position opposing the one ridge on the lower surface, there are provided two annular ridges which are pressed against the valve box to seal the opening, and the peripheral edge of the diaphragm is formed as a thin portion. Are sandwiched by the sandwiching ridge, the thick portion of the diaphragm is sandwiched by the sandwiching notch and fastened and fixed, and the periphery of the thin portion is located inside the periphery of the sandwiching ridge. Highly sealed fluid controller.