KR20200070366A - Diaphragm valve - Google Patents

Abstract

In the diaphragm valve 10, the valve body 11 includes an inlet-side flow passage 241, an outlet-side flow passage 242, a communication portion 243, a first surface 31, and a second surface 32 ) And an inlet-side rib 51 and an outlet-side rib 52. The communication part 243 connects the inlet-side flow path 241 and the outlet-side flow path 242 in succession. The opening 31a facing the communication portion 243 is formed on the first surface 31. The second surface 32 faces the first surface 31 with the inlet-side channel 241 and the outlet-side channel 242 interposed therebetween. The inlet-side rib 51 is formed on the second surface 32 and is formed along the inlet-side flow path 241. The outlet side rib 52 is formed on the second surface 32 and is formed along the outlet side flow path 242. A recess 51a is formed in the inlet rib 51. A recess 52a is formed in the outlet-side rib 52.

Description

Diaphragm valve

The present invention relates to a diaphragm valve.

A diaphragm valve is formed in a piping line in a plant such as water treatment, chemical, food, etc., and the fluid flowing through the piping is controlled by the diaphragm valve (see, for example, Patent Document 1).

In such a diaphragm valve, piping is connected to both ends to be installed in the plant. In the diaphragm valve, the flow path is closed by the diaphragm being pressed against the partition wall, and the flow path is opened by the diaphragm being separated from the partition wall.

Japanese Patent Application Publication No. 2007-278308

However, since piping is connected to both ends of the diaphragm valve, external force, such as a tensile force by the piping, is applied to the diaphragm valve, whereby long-term durability performance may be reduced.

An object of the present invention is to provide a diaphragm valve with improved long-term durability performance.

In order to achieve the above object, the diaphragm valve according to the first invention includes a valve body, a diaphragm, a bonnet, and a driving mechanism. The valve body has an inlet side flow passage, an outlet side flow passage, a communication portion, a first surface, a second surface, an inlet side rib, and an outlet side rib. The communicating portion allows the inlet-side flow path and the outlet-side flow path to pass through. The first surface is formed with an opening facing the communicating portion. The second surface faces the first surface with the inlet-side flow passage and the outlet-side flow passage interposed therebetween. The inlet rib is formed on the second surface and is formed along the inlet channel. The outlet side rib is formed on the second surface and is formed along the outlet side flow path. The diaphragm is arranged on the first surface to close the opening. The bonnet is fixed to the valve body to cover the diaphragm. The drive mechanism drives the diaphragm to close or open the communication portion. A recess is formed in at least one of the inlet rib and the outlet rib.

Thus, by forming a recess in the rib formed along the flow path, stress generated in the valve body can be dispersed even when an external force is applied to the diaphragm valve.

That is, although the effect of reinforcing the valve body is exhibited by forming the ribs, stress may be concentrated in the vicinity of the ribs, so that the stress can be dispersed by forming the concave portion as described above.

The diaphragm valve according to the second invention is a diaphragm valve according to the first invention, in which the first inclined end portion and the second inclined end portion are formed in the concave portion. The first inclined end is inclined toward the first inclined end toward the second inclined end, and the second inclined end is inclined toward the first inclined toward the first inclined end, and the first inclined end and 2 The angle formed by the inclined ends is 110 degrees or more and 170 degrees or less.

In this way, the angle formed by the first inclined end portion and the second inclined end portion is 110 degrees or more and 170 degrees or less, so that even when an external force is applied to the diaphragm valve, stress generated in the valve body can be dispersed.

Although the effect of reinforcing the valve body is exhibited by forming the rib, stress may be concentrated in the vicinity of the rib, so that the stress can be dispersed by forming the first inclined end and the second inclined end as described above.

Therefore, the long-term durability performance of the diaphragm valve can be improved.

The diaphragm valve according to the third invention is a diaphragm valve according to the first or second invention, and the concave portions are formed on both the inlet side rib and the outlet side rib.

Thereby, stress can be distributed over the entire flow path of the valve body of the diaphragm valve.

The diaphragm valve according to the fourth invention is a diaphragm valve according to the first or second invention, wherein the first inclined end portion and the second inclined end portion are continuously connected by curved ends.

Thereby, the effect of dispersing a stress can be exhibited more.

The diaphragm valve according to the fifth invention is a diaphragm valve according to any one of the first to fourth inventions, and the drive mechanism includes a stem, a compressor, and a drive unit. The stem is supported by the bonnet. The compressor is mounted on the stem and is also connected to the diaphragm. The drive unit drives the stem. The driving unit is a manual, air-driven, or electric-driven type.

In this way, the stem can be driven manually, by air or electricity, so that the flow path is closed or opened.

According to the present invention, it is possible to provide a diaphragm valve with improved long-term durability performance.

1 is a perspective view of a diaphragm valve of an embodiment according to the present invention.
FIG. 2 is a partial cross-sectional view of the diaphragm valve of FIG. 1.
3 is a perspective view of the valve body of FIG. 1 as viewed from above.
4 is a perspective view of the valve body of FIG. 1 when viewed from below.
5 is a front view of the valve body of FIG. 1.
6 is a bottom view of the valve body of FIG. 1.
7 is a cross-sectional view indicated by arrows between AA′ in FIG. 6.
FIG. 8 is an enlarged view of the S part of FIG. 7 (a), and an enlarged view of the T part of FIG. 7.
Fig. 9 is a schematic cross-sectional view showing a state in which the flow path is closed, and (b) a schematic cross-sectional view showing the state in which the flow channel is opened.
10(a) to 10(c) are cross-sectional views for explaining stresses occurring in Examples.
11 is a diagram showing a table of determination results in Examples.

Hereinafter, the diaphragm valve in the embodiment according to the present invention will be described with reference to the drawings.

<1. Configuration>

1 is an external perspective view of a diaphragm valve 10 of an embodiment according to the present invention. 2 is a partial cross-sectional configuration diagram of the diaphragm valve 10 of the present embodiment.

The diaphragm valve 10 of this embodiment is provided with the valve body 11, the diaphragm 12, the bonnet 13, and the drive mechanism 14, as shown in FIGS. 1 and 2. Piping is connected to both ends of the valve body 11, and a flow path 24 through which fluid flows is formed in the valve body 11. The diaphragm 12 opens or blocks the flow path 24. The bonnet 13 is attached to the valve body 11 so as to cover the diaphragm 12. A part of the drive mechanism 14 is disposed in the bonnet 13 and drives the diaphragm 12.

(Valve body 11)

3 is a perspective view of the valve body 11 seen from the first surface 31 side, which will be described later. 4 is a perspective view of the valve body 11 seen from the side of the second surface 32 to be described later. 5 is a front view of the valve body 11, and FIG. 6 is a bottom view of the valve body 11. In addition, FIG. 7 is a cross-sectional view indicated by arrows between AA′ in FIG. 6.

The valve body 11 is made of PVC (polyvinyl chloride), HT (heat-resistant vinyl chloride tube), PP (polypropylene), or PVCF (polyvinylidene fluoride), polystyrene, ABS resin, polytetrafluoroethylene, perfluor It can be formed by a resin such as a roalkyl vinyl ether copolymer, polychlorotrifluoroethylene, or a metal such as iron, copper, copper alloy, brass, aluminum, stainless steel, or porcelain.

As shown in FIG. 3, the valve body 11 has a first end portion 21, a second end portion 22, a central portion 23, and a flow path 24.

The 1st end part 21, the 2nd end part 22, and the center part 23 are integrally formed, and the flow path 24 is the 1st end part 21 and the center part 23, as shown in FIG. ) And the second end 22.

(First end 21, second end 22)

As shown in FIGS. 3 and 4, the first end portion 21 and the second end portion 22 are arranged so as to sandwich the central portion 23 and are connected to the central portion 23.

As shown in FIG. 3, the first end portion 21 includes a first flange portion 211 to which piping is connected, and a first connection portion 212 connecting the first flange portion 211 and the central portion 23. Have As shown in FIG. 4, the 1st flange part 211 has the 1st flange surface 213 in which the inlet 24a into which the fluid flows into the valve body 11 was formed, and piping is connectable.

Moreover, as shown in FIG. 4, the 2nd end part 22 is the 2nd flange part 221 to which piping is connected, and the 2nd connection part 222 which connects the 2nd flange part 221 and the center part 23 ). As shown in FIG. 3, the 2nd flange part 221 has the 2nd flange surface 223 in which the outlet 24b from which the fluid discharges from the valve body 11 was formed, and piping is connectable.

The first flange portion 211 and the second flange portion 221 are disposed to face each other as shown in FIGS. 3 and 4, and the first flange surface 213 and the second flange surface 223 are shown in FIG. 7. As shown in, it is formed so as to be parallel to each other. Further, the positions of the inlet 24a and the positions of the outlet 24b are also opposed.

(Central part 23, Euro 24)

The central part 23 is formed between the 1st end part 21 and the 2nd end part 22, as shown in FIG. The central portion 23 has a first surface 31, a second surface 32, a wall portion 33 (see FIG. 7 ), and a rib 34.

The first surface 31 is substantially planar, as shown in FIG. 3, and is formed perpendicular to the first flange surface 213 and the second flange surface 223. An opening 31a is formed in the center of the first surface 31. The opening 31a is formed by bending its circumferential edge. Further, the direction along the line connecting the inlet 24b from the inlet 24a is set to the first direction X, and the direction perpendicular to the first direction X and parallel to the first surface 31 is also set. In the second direction (Y). The first direction X may also be referred to as a direction along a straight line perpendicular to the first flange surface 213 and the second flange surface 223.

5, the second surface 32 is a surface facing the first surface 31 with the flow path 24 interposed therebetween. The second surface 32 is formed along the shape of the flow path 24. The second surface 32 is a surface opposite to the side on which the bonnet 13 of the central portion 23 is disposed.

As shown in FIG. 7, the flow path 24 is formed from the inlet 24a to the outlet 24b. The wall portion 33 is formed to protrude toward the first surface 31 at the center of the flow path 24. The wall portion 33 is formed so that the inner surface of the flow path 24 is gently raised toward the first surface 31 so as to form an inclination in the flow path 24. The above-mentioned opening 31a is formed at a position corresponding to the wall portion 33. The diaphragm 12 to be described later is pressed against the front end portion 33a on the first surface 31 side of the wall portion 33.

The flow path 24 is a wall portion 33 from the inlet side flow path 241 formed from the inlet 24a of the first end 21 to the wall portion 33 and the outlet 24b of the second end 22 It has an outlet side flow path 242 formed up to, and a communication portion 243 for connecting the inlet side flow path 241 and the outlet side flow path 242 in succession.

As shown in FIG. 7, the entrance-side flow passage 241 is narrowed as the width in the direction perpendicular to the first surface 31 faces the wall portion 33. On the other hand, the width of the inlet side flow path 241 in the direction parallel to the first surface 31 (the direction perpendicular to the paper surface in FIG. 7) is widened as it faces the wall portion 33. .

The outlet side flow passage 242 is formed from the outlet 24b of the second flange portion 221 to the wall portion 33. As shown in FIG. 7, the exit-side flow passage 242 is narrowed as the width in the direction perpendicular to the first surface 31 faces the wall portion 33. On the other hand, the width of the exit-side flow path 242 in a direction parallel to the first surface 31 (direction perpendicular to the paper surface in FIG. 7) is widening toward the wall portion 33.

The communication portion 243 is a portion of the flow path 24 on the side of the first surface 31 of the wall portion 33, and allows the inlet-side flow path 241 and the outlet-side flow path 242 to pass through.

As shown in FIG. 4, the second surface 32 has an inlet side curved portion 321 along the inlet side flow path 241 and an outlet side curved portion 322 along the outlet side flow path 242. Protrusions to the first surface 31 side of the wall portion 33 shown in FIG. 7 are formed by the inlet-side curved portion 321 and the outlet-side curved portion 322.

(Rib (34))

The ribs 34 are formed to protrude from the second surface 32 perpendicular to the first surface 31 as shown in FIGS. 4 and 6. The rib 34 has a first rib 41 and a second rib 42.

4 and 6, the first rib 41 is from the inlet-side curved portion 321 in the second surface 32 to the outlet-side curved portion 322 along the first direction X, as shown in FIGS. 4 and 6. Is formed. Moreover, the 1st rib 41 is formed in the center of the center part 23 in the 2nd direction Y.

The second rib 42 is formed along the second direction Y and is formed at the center in the first direction X of the central portion 23.

Moreover, the outer edge part 35 is formed toward the 2nd surface 32 side from each of both ends of the 2nd direction Y of the 1st surface 31, and the 2nd rib 42 is one side It is formed from the outer edge portion 35 to the other outer edge portion 35.

The first ribs 41 and the second ribs 42 cross each other in a planar shape as shown in Fig. 6 in the central portion 43, which is the center of each. 4, the bolt hole 43a is formed in the center part 43 toward the 1st surface 31 as shown in FIG.

The first rib 41 is formed on the inlet side rib 51 formed on the inlet 24a side with respect to the central portion 43 and on the outlet 24b side based on the central portion 43. It has an outlet side rib 52.

The inlet-side rib 51 is formed along the inlet-side flow path 241. It can be said that the inlet rib 51 is formed along the direction perpendicular to the first flange surface 213 and the second flange surface 223.

As shown in FIGS. 4 and 7, the inlet rib 51 is formed with a recess 51a. The stress generated by the external force is relieved by the concave portion 51a. Fig. 8(a) is an enlarged view of the S part in Fig. 7. As shown in FIG. 8(a), the inlet-side rib 51 has a first inclined end portion 511, a second inclined end portion 512, and a first inclined end portion 511 in the concave portion 51a. And a curved end 513 connecting between the second inclined end 512. The first inclined end portion 511 and the second inclined end portion 512 are formed in a straight line in the case seen along the second direction Y.

The first inclined end portion 511, the curved end portion 513, and the second inclined end portion 512 are arranged from the central portion 43 toward the first end portion 21.

The first inclined end portion 511 is inclined from the central portion 43 toward the first end portion 21 toward the first surface 31. The second inclined end 512 is inclined away from the first surface 31 from the central portion 43 side toward the first end 21 side.

In addition, the first inclined end portion 511 is inclined toward the second inclined end portion 512 toward the first surface 31, and the second inclined end portion 512 is in the first inclined end portion 511 side It can also be said to be inclined toward the first surface 31 toward the.

The curved end portion 513 continuously connects the first inclined end portion 511 and the second inclined end portion 512 without a step.

As shown in Fig. 8(a), the angle θ1 formed by the straight line L1 along the first inclined end 511 and the straight line M1 along the second inclined end 512 when viewed from the front is , 110 degrees or more, and 170 degrees or less.

The outlet-side ribs 52 are formed along the outlet-side flow path 242 on the second surface 32 while being on the second end 22 side than the central portion 43. It can also be said that the outlet ribs 52 are formed along the directions perpendicular to the first flange surface 213 and the second flange surface 223.

As shown in FIG. 4 and FIG. 7, the concave portion 52a is formed in the outlet-side rib 52. The concave portion 52a relieves stress generated by an external force. Fig. 8(b) is an enlarged view of the T portion in Fig. 7. The outlet-side rib 52 is in the concave portion 52a, between the first inclined end portion 521, the second inclined end portion 522, and the first inclined end portion 521 and the second inclined end portion 522. It has a curved end 523 connecting. The 1st inclined end part 521 and the 2nd inclined end part 522 are formed linearly in the case seen along the 2nd direction Y (at the front).

From the central part 43, it is arrange|positioned toward the 2nd end part 22 in order of 1st inclined end part 521, the curved end part 523, and the 2nd inclined end part 522.

The first inclined end portion 521 is inclined from the central portion 43 toward the second end portion 22 toward the first surface 31. The second inclined end portion 522 is inclined away from the first surface 31 from the central portion 43 side toward the second end portion 22 side.

Further, the first inclined end portion 521 is inclined toward the second inclined end portion 522 toward the first surface 31, and the second inclined end portion 522 is on the first inclined end portion 521 side It can also be said to be inclined toward the first surface 31 toward the.

The curved end portion 513 continuously connects the first inclined end portion 511 and the second inclined end portion 512 without a step.

As shown in Fig. 8(b), the angle θ2 formed by the straight line L2 along the first inclined end 521 and the straight line M2 along the second inclined end 522 when viewed from the front is , 110 degrees or more, and 170 degrees or less.

(Diaphragm (12))

The material of the diaphragm 12 may just be a rubber-like elastic body, and is not particularly limited. For example, ethylene propylene rubber, isoprene rubber, chloroprene rubber, chlorosulfonated rubber, nitrile rubber, styrene-butadiene rubber, chlorinated polyethylene, fluorine rubber, EPDM (ethylene/propylene/diene rubber), PTFE (polytetrafluoroethylene) Etc. are mentioned as a preferable material.

Further, a high-strength reinforcing cloth may be inserted into the diaphragm 12, and the reinforcing cloth is preferably made of nylon. This is preferable because it is possible to prevent deformation or breakage of the diaphragm 12 when fluid pressure is applied to the diaphragm 12 when the diaphragm valve is closed.

The diaphragm 12 is arranged on the first surface 31 so as to close the opening 31a as shown in FIG. 2. The outer circumferential edge portion 121 of the diaphragm 12 is sandwiched between the bonnet 13 to be described later and the valve body 11.

The diaphragm 12 moves downward by the driving mechanism 14 to be described later, and closes the communication portion 243 by contacting the tip portion 33a of the wall portion 33, thereby closing the flow path 24. Moreover, the diaphragm 12 moves upward by the drive mechanism 14, and the flow path 24 is opened by the diaphragm 12 being separated from the front-end|tip part 33a.

(Bonnet (13))

The bonnet 13, like the valve body 11, is PVC (polyvinyl chloride), HT (heat-resistant vinyl chloride tube), PP (polypropylene), or PVCF (polyvinylidene fluoride), polystyrene, ABS resin, poly It can be formed of a resin such as tetrafluoroethylene, perfluoroalkyl vinyl ether copolymer, polychlorotrifluoroethylene, or a metal such as iron, copper, copper alloy, brass, aluminum, stainless steel, or porcelain. .

The bonnet 13 is fixed to the first surface 31 of the valve body 11 by a bolt 100 or the like, as shown in FIGS. 1 and 2. The bonnet 13 is formed so as to cover the opening 31a via the diaphragm 12.

That is, the bonnet 13 has an opening 13a corresponding to the first surface 31, and a through hole in which the sleeve 62 and the stem 63, which will be described later, are disposed at positions facing the opening 13a. (13b).

(Drive mechanism 14)

The drive mechanism 14 has a compressor 61, a sleeve 62, a stem 63, and a handle 64.

The compressor 61 is formed of PVDF (polyvinylidene fluoride) or the like, and is connected to the diaphragm 12. The engagement member 65 is embedded in the diaphragm 12, and the engagement member 65 protrudes to the opposite side (non-contact surface side) of the valve body 11. The protruding part of the engaging member 65 is engaged with the compressor 61, so that the compressor 61 and the diaphragm 12 are connected.

The sleeve 62 is supported by the through hole 13b of the bonnet 13. A screw shape is formed inside the sleeve 62.

The stem 63 is disposed inside the sleeve 62 and is screwed into a screw shape formed inside the sleeve 62. The compressor 61 is fixed to the end disposed inside the bonnet 13 of the stem 63. The compressor 61 is engaged with the diaphragm 12 on the valve body 11 side, and is fixed to the stem 63 on the opposite side to the valve body 11.

The handle 64 is fitted to the outer periphery of the portion located outside the bonnet 13 of the stem 63.

<2. Action>

Next, the operation of the diaphragm valve 10 of this embodiment will be described. 9A and 9B are diagrams schematically showing the operation of the diaphragm 12.

When the handle 64 is rotated in the direction in which the flow path 24 is closed from the state in which the flow path 24 is open as shown in Fig. 9(a), the stem 63 is rotated according to the rotation of the handle 64. It descends (see Fig. 2). Along with the lowering of the stem 63, the compressor 61 fixed to the end of the stem 63 is also lowered.

As the compressor 61 descends, the diaphragm 12 convexly curves toward the second surface 32 as shown in Fig. 9(b), and is pressed against the tip portion 33a of the wall portion 33.

Thereby, the flow path 24 of the diaphragm valve 10 is blocked.

On the other hand, when the handle 64 is rotated in the opening direction, the stem 63 rises according to the rotation of the handle 64. As the stem 63 rises, the compressor 61 also rises, and the central portion of the diaphragm 12 engaged with the compressor 61 rises as shown in Fig. 9(a).

Thereby, the flow path 24 of the diaphragm valve 10 is opened.

<3. Example>

When the θ1 and θ2 were changed to 100°, 110°, 140°, 170°, and 180°, stress generated in the valve body 11 was analyzed to determine in three states.

As the first state, the stress generated in the valve body 11 when the diaphragm 12 was pressed against the wall portion 33 was judged. As the second state, the stress generated in the valve body 11 due to the self-weight of the diaphragm valve 10 was judged. As the third state, the stress generated in the valve body 11 when the first flange portion 211 and the second flange portion 221 were pulled by piping was judged.

10(a) is a diagram showing the stress applied to the valve body 11 in the first state. The force when pressing the diaphragm 12 against the wall portion 33 is represented by F1. By F1, the stress F2 toward the inside in the first direction X is generated on the first surface 31 side of the valve body 11, and the inlet-side rib 51 and the outlet-side rib 52 ), the stress F3 toward the outside occurs.

Fig. 10(b) is a diagram showing the stress applied to the valve body 11 in the second state. When a bolt is inserted into the bolt hole 43a of the central portion 43 to fix the valve body 11 in a predetermined place, the force applied to the valve body 11 is indicated by F1. By F1, the stress F2 toward the outside in the first direction X is generated on the first surface 31 side of the valve body 11, and the inlet-side rib 51 and the outlet-side rib 52 ), stress F3 toward the inside is generated.

Fig. 10(c) is a diagram showing the stress applied to the valve body 11 in the third state. The force at which the first flange portion 211 and the second flange portion 221 are pulled by the pipe is indicated by F1. By F1, the stress F2 toward the outside in the first direction X is generated on the first surface 31 side of the valve body 11, and the inlet-side rib 51 and the outlet-side rib 52 ), stress F3 toward the inside is generated.

The sizes of F2 and F3 were determined by analysis to determine whether they were good or not. Since the size of F2 is proportional to the size of F3, only F2 is used as a criterion. 11 is a diagram showing the determination result in the above embodiment.

In the first state, the case where the stress is 400 MPa or less was judged good, in the second state, the case where the stress was 2 MPa or less was judged good, and in the third state, the case where the stress was 50 MPa or less was judged as good. .

As shown in the figure, when θ1 and θ2 are 110° or more and 170° or less, the judgment is a good result in any of the three states.

<4. Features, etc.>

(4-1)

The diaphragm valve 10 of the present embodiment includes a valve body 11, a diaphragm 12, a bonnet 13, and a drive mechanism 14. The valve body 11 includes an inlet side flow passage 241, an outlet side flow passage 242, a communication portion 243, a first surface 31, a second surface 32, and an inlet side rib ( 51) and an outlet side rib 52. The communication part 243 connects the inlet-side flow path 241 and the outlet-side flow path 242 in succession. The opening 31a facing the communication portion 243 is formed on the first surface 31. The second surface 32 faces the first surface 31 with the inlet-side channel 241 and the outlet-side channel 242 interposed therebetween. The inlet-side rib 51 is formed on the second surface 32 and is formed along the inlet-side flow path 241. The outlet-side rib 52 is formed on the second surface 32 and is formed along the outlet-side flow path 242. The diaphragm 12 is arranged on the first surface 31 so as to close the opening 31a. The bonnet 13 is fixed to the valve body 11 so as to cover the diaphragm 12. The drive mechanism 14 drives the diaphragm 12 to close or open the communication portion 243. A recess 51a is formed in the inlet rib 51. A recess 52a is formed in the outlet-side rib 52.

Thus, by forming the concave portions 51a, 52a in the first rib 41 formed along the flow path 24, even when an external force is applied to the diaphragm valve 10, stress generated in the valve body 11 Can be dispersed.

That is, although the effect of reinforcing the valve body is exerted by forming the ribs, stress may be concentrated in the vicinity of the ribs, so that the stresses can be dispersed by forming the recesses 51a and 52a as described above.

Therefore, the long-term durability performance of the diaphragm valve 10 can be improved.

(4-2)

In the diaphragm valve 10 of the present embodiment, the first inclined end portion 511 and the second inclined end portion 512 are formed in the concave portion 51a. The first inclined end portion 511 is inclined toward the second inclined end portion 512 toward the first surface 31, and the second inclined end portion 512 is directed toward the first inclined end portion 511 side The angle θ1 formed by the first inclined end portion 511 and the second inclined end portion 512 is inclined so as to approach the first surface 31, and is 110 degrees or more and 170 degrees or less. A first inclined end portion 521 and a second inclined end portion 522 are formed in the concave portion 52a. The first inclined end portion 521 is inclined toward the second inclined end portion 522 and closer to the first surface 31, and the second inclined end portion 522 is directed toward the first inclined end portion 521 side The angle θ2 formed by the first inclined end portion 521 and the second inclined end portion 522 is inclined to approach the first surface 31, and is 110 degrees or more and 170 degrees or less.

Thus, by setting the angles θ1 and θ2 formed by the first inclined ends 511 and 521 and the second inclined ends 512 and 522 to 110 degrees or more and 170 degrees or less, an external force is applied to the diaphragm valve 10. Even when this is applied, stress generated in the valve body 11 can be dispersed.

Although the effect of reinforcing the valve body is exerted by forming the ribs, since stress may be concentrated in the vicinity of the ribs, the first inclined ends 511 and 521 and the second inclined ends 512 and 522 are formed as described above. By doing so, it becomes possible to disperse the stress.

Therefore, the long-term durability performance of the diaphragm valve 10 can be improved.

(4-3)

In the diaphragm valve 10 of this embodiment, a concave portion 51a is formed on the inlet side rib 51 and a concave portion 52a is formed on the outlet side rib 52.

Thereby, the stress can be distributed over the entire flow path 24 of the valve body 11 of the diaphragm valve 10.

(4-4)

In the diaphragm valve 10 of the present embodiment, the first inclined end portion 511 and the second inclined end portion 512 are continuously connected by a curved end portion 513. Moreover, the 1st inclined end part 521 and the 2nd inclined end part 522 are continuously connected by the curved end part 523 (an example of a curved end part).

Thereby, the effect of dispersing a stress can be exhibited more.

(4-5)

In the diaphragm valve 10 of the present embodiment, the drive mechanism 14 has a stem 63, a compressor 61, and a handle 64 (an example of a driving portion). The stem 63 is supported by the bonnet 13. The compressor 61 is attached to the stem 63 and is also connected to the diaphragm 12. The handle 64 drives the stem 63. The handle 64 is manual.

Thus, the stem 63 can be driven manually, and the flow path 24 is blocked or opened.

[Other embodiments]

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention.

(A)

In the above-described embodiment, although concave portions are formed on both the inlet-side rib 51 and the outlet-side rib 52, they may be formed on only one side. Even in this case, it is possible to exert the effect that the stress is relieved by at least the recess on the side where the recess is formed.

(B)

In the diaphragm valve 10 of the above-described embodiment, a manual handle 64 is formed as an example of the drive portion, but the stem 63 may be driven by an air-driven or electric-driven drive portion.

(C)

In the diaphragm valve 10 of the above embodiment, the wall portion 33 is formed, but the wall portion 33 does not have to be formed, i.e., only the flow path 24 can be closed or opened by the diaphragm 12. You can do it.

(D)

In the diaphragm valve 10 of the above embodiment, a curved end 513 is formed between the first inclined end 511 and the second inclined end 512, and the first inclined end 521 and the second inclined end Although the curved ends 523 are formed between 522, both or one of the curved ends 513 and 523 are not formed, and the inclined ends may be directly connected.

In addition, the connection between the first inclined end 511 and the second inclined end 512 and/or between the first inclined end 521 and the second inclined end 522 is not a curved end, but a straight end. It may be.

Industrial availability

The diaphragm valve of the present invention exerts an effect of improving long-term durability performance, and is useful when used in a plant or the like.

10: diaphragm valve
11: valve body
12: diaphragm
13: bonnet
14: driving mechanism
24: Euro
31: first side
31a: opening
32: second side
51: entrance rib
51a: Concave
52: outlet rib
52a: recess
241: entrance channel
242: outlet side flow path
243: Ministry of Communication
511: first inclined end
512: second inclined end
521: first inclined end
522: second inclined end

Claims (5)

An inlet flow channel, an outlet flow channel, a communication portion connecting the inlet flow channel and the outlet flow channel in succession, a first surface having an opening facing the communication section, the inlet flow channel and the outlet flow channel A second surface facing the first surface with an interposed therebetween, an inlet rib formed on the second surface, formed along the inlet channel, and formed on the second surface, along the outlet channel A valve body having an outlet rib formed therein,
A diaphragm disposed on the first surface to close the opening,
A bonnet fixed to the valve body to cover the diaphragm,
It has a driving mechanism for driving the diaphragm to shield or open the communication portion,
A diaphragm valve, wherein a recess is formed in at least one rib of the inlet rib and the outlet rib. According to claim 1,
The rib has a first inclined end and a second inclined end in the recess,
The first inclined end is inclined toward the second inclined end toward the first surface, and the second inclined end is inclined toward the first inclined toward the first inclined end, The angle formed by the first inclined end and the second inclined end is 110 degrees or more and 170 degrees or less, a diaphragm valve. The method according to claim 1 or 2,
The concave portion is formed on both the inlet side rib and the outlet side rib, the diaphragm valve. According to claim 2,
The first inclined end and the second inclined end are continuously connected by a curved end, the diaphragm valve. The method according to any one of claims 1 to 4,
The drive mechanism,
A stem supported by the bonnet,
A compressor mounted on the stem and connected to the diaphragm;
It has a drive for driving the stem,
The drive unit is a manual, air-driven, or electric-driven, diaphragm valve.

Images