JPWO2019151490A1 - Channel structure - Google Patents

Abstract

The flow path structure (200) is a flow path structure through which the slurry flows, and includes a first flow path surface (P1), a second flow path surface (P2), and a first flow path portion (201). The first flow path surface (P1) is perpendicular to the flow direction X of the slurry. The second flow path surface (P2) is perpendicular to the flow direction X of the slurry. The first flow path portion (201) communicates with the first flow path surface (P1) and the second flow path surface (P2), and the flow direction X is from the first flow path surface (P1) to the second flow path surface (P2). The area of the flow path shape perpendicular to is gradually reduced. Assuming that the inner diameter of the flow path shape in the width direction Y on the first flow path surface (P1) is L1 and the inner diameter of the flow path shape on the second flow path surface (P2) in the width direction Y is L2, L1 <L2. Assuming that the area of the flow path shape (210) on the first flow path surface (P1) is S1 and the area of the flow path shape (220) on the second flow path surface (P2) is S2, S1> S2.

Description

The present invention relates to a flow path structure.

Slurry may be circulated in the flow path in plants such as food and chemistry (see, for example, Patent Document 1).
In the food recycling system shown in Patent Document 1, waste energy is recovered and reused by linking the treatment of collected food recycling resources such as kitchen waste with the biogasification cogeneration system.

In this recycling system, foreign substances are removed from the input food recycling resources, pulverized slurry treatment is performed, and the pulverized slurry is introduced into the bioreactor after its concentration is adjusted in the slurry tank.

Japanese Unexamined Patent Publication No. 2004-148217

However, when the slurry is transported through the flow path, the slurry may sink due to gravity in the flow path and the slurry may stay.
An object of the present invention is to provide a flow path structure capable of suppressing retention of slurry in the flow path.

(Means to solve problems)
In order to achieve the above object, the flow path structure according to the first invention is a flow path structure through which the slurry flows, and includes a first flow path surface, a second flow path surface, and a flow path portion. The first flow path surface is perpendicular to the flow direction of the slurry. The second flow path surface is perpendicular to the flow direction of the slurry. The flow path portion communicates with the first flow path surface and the second flow path surface, and the area of the flow path shape perpendicular to the flow direction from the first flow path surface to the second flow path surface gradually shrinks. Assuming that the inner diameter of the flow path shape on the first flow path surface in the first predetermined direction is L1 and the inner diameter of the flow path shape on the second flow path surface in the second predetermined direction parallel to the first predetermined direction is L2, L1 <L2. If the area of the flow path shape on the first flow path surface is S1 and the area of the flow path shape on the second flow path surface is S2, then S1> S2.

By changing the shape of the flow path through which the slurry flows in this way, the slurry is mixed in the upper layer portion and the lower layer portion in the flow path, so that the sinking of the slurry due to gravity can be suppressed. Therefore, the retention of the slurry in the pipe can be suppressed.

The flow path structure according to the second invention is the flow path structure according to the first invention, and the flow path shape on the first flow path surface is circular or flat. The shape of the flow path on the second flow path surface is flat. The flow path shape on the second flow path surface has a larger flatness than the flow path shape on the first flow path surface.

By making the flatness of the flow path shape on the second flow path surface larger than that of the flow path shape on the first flow path surface, the width of the height of the flow path shape in the vertical direction gradually narrows, and subsidence due to gravity is suppressed. can do.

The flow path structure according to the third invention is the flow path structure according to the first or second invention, and if the length between the first flow path surface and the second flow path surface is D1, 0.7L1 ≦ D1 ≦ 2.4L1.
As a result, the sinking of the slurry due to gravity can be suppressed and the retention can be suppressed.

The flow path structure according to the fourth invention is the flow path structure according to the first or second invention, and further includes a third flow path surface. The third flow path surface is perpendicular to the flow direction of the slurry. The third flow path surface is arranged on the opposite side of the first flow path surface with respect to the second flow path surface. The flow path shape on the third flow path surface is the same as the flow path shape on the first flow path surface. The area of the flow path shape perpendicular to the flow direction gradually shrinks from the third flow path surface toward the second flow path surface.
As a result, the sinking of the slurry due to gravity can be suppressed and the retention can be suppressed.

The flow path structure according to the fifth invention is the flow path structure according to any one of the first to third inventions, and is located on the upstream side and the downstream side of the second flow path surface in the flow direction toward the second flow path surface. The area of the vertical flow path shape is gradually shrinking.
As a result, the sinking of the slurry due to gravity can be suppressed and the retention can be suppressed.

(Effect of the invention)
According to the present invention, it is possible to provide a flow path structure capable of suppressing the retention of slurry in the flow path.

(A) A side view showing a pipe using the flow path structure of the first embodiment according to the present invention, (b) a plan view of FIG. 1 (a). (A) Cross-sectional view of the first flow path surface of FIGS. 1 (a) and 1 (b), (b) cross-sectional view of the second flow path surface of FIGS. 1 (a) and 1 (b), (c). 1 (a) and FIG. 1 (b) are cross-sectional views on the third flow path surface. The figure which shows the table of the result of Examples 1 to 4 and Comparative Examples 1 to 4. The figure which shows the table of the result of Examples 5-12 and Comparative Examples 5-7. (A) A diagram showing a table of the results of Examples 6 and Comparative Examples 8 and 9, (b) a diagram showing a flow path shape of the second flow path surface of Comparative Example 8, and (c) a second flow path surface of Comparative Example 9. The figure which shows the flow path shape of (d) is the figure which shows the flow path shape of the 2nd flow path surface of Example 13. The perspective view which shows the joint using the flow path structure of Embodiment 2 which concerns on this invention. (A) Side view of the joint of FIG. 6, (b) sectional view of the first flow path surface of FIG. 7 (a), (c) sectional view of the second flow path surface of FIG. 7 (a), (d) FIG. (A) is a cross-sectional view on the third flow path surface. The perspective view of the diaphragm valve using the flow path structure of Embodiment 3 which concerns on this invention. FIG. 8 is a partial cross-sectional view of the diaphragm valve of FIG. A perspective view of the valve body of FIG. 8 as viewed from above. A perspective view of the valve body of FIG. 8 as viewed from below. The front view of the valve body of FIG. The bottom view of the valve body of FIG. FIG. 7 is a cross-sectional view taken along the line between AA'in FIG. (A) A view showing a first flow path surface of FIG. 14, (b) a cross-sectional view of the second flow path surface of FIG. 14, and (c) a view showing a third flow path surface of FIG. (A) A schematic cross-sectional view showing a state in which the flow path is closed, and (b) a schematic cross-sectional view showing a state in which the flow path is open. The figure which shows the graph of the change of the cross-sectional area of the diaphragm valve of this embodiment and the conventional diaphragm valve.

Hereinafter, the flow path structure according to the present invention will be described with reference to the drawings.
(Embodiment 1)
Hereinafter, the flow path structure according to the first embodiment of the present invention will be described.

FIG. 1A is a side view showing a pipe 240 having the flow path structure 200 of the first embodiment. FIG. 1B is a plan view of the pipe 240 having the flow path structure 200. 2 (a) is a cross-sectional view taken along the first flow path surface P1 of FIGS. 1 (a) and 1 (b), and FIG. 2 (b) is a cross-sectional view of FIG. 1 (a) and FIG. 1 (b). 2 is a cross-sectional view on the flow path surface P2, and FIG. 2 (c) is a cross-sectional view on the third flow path surface P3 of FIGS. 1 (a) and 1 (b).

As shown in FIGS. 1A and 1B, the pipe 240 has a flow path structure 200. Slurry flows through the pipe 240. The flow path structure 200 includes a first flow path surface P1, a second flow path surface P2, a third flow path surface P3, a first flow path portion 201, and a second flow path portion 202.

The flow path structure 200 is formed between the pipes 240 and is provided to suppress the retention of the slurry. In the flow path structure 200 of the present embodiment, the outer diameter of the pipe 240 is kept constant, and the flow path shape is changed by changing the wall thickness. The vertical direction Z in the flow path structure 200 is shown in FIG. 1 (a), and the width direction Y is shown in FIG. 1 (b). The vertical direction Z is a direction perpendicular to the width direction Y. The vertical direction can be said to be the vertical direction, and the width direction Y can be said to be the horizontal direction.

The first flow path surface P1 has a cross section perpendicular to the flow direction X of the slurry, and is located upstream in the flow path structure 200. The flow path shape 210 on the first flow path surface P1 is a circular shape having a diameter L1. Since the flow path shape on the first flow path surface P1 is circular, both the diameter in the vertical direction Z and the diameter in the width direction Y are L1.

The second flow path surface P2 has a cross section perpendicular to the flow direction X of the slurry, and is located on the downstream side of the first flow path surface P1. The flow path shape 220 on the second flow path surface P2 is a flat shape. In the flow path shape 220, the length of the longest diameter in the width direction Y is L2, and the length of the longest diameter in the vertical direction X is the diameter L3. L2> L3 is set. Further, the diameter L2 is larger than the diameter L1, and the diameter L3 is smaller than the diameter L1.

Further, assuming that the area of the flow path shape of the first flow path surface P1 is S1 and the area of the flow path shape of the second flow path surface P2 is S2, S2 <S1 is set.
The first flow path portion 201 connects the first flow path surface P1 and the second flow path surface P2, and is a flow path that is gradually perpendicular to the flow direction X from the first flow path surface P1 to the second flow path surface P2. The area of the shape is gradually shrinking.

Further, the length D1 between the first flow path surface P1 and the second flow path surface P2 along the flow direction X of the slurry satisfies 0.7L1 ≦ D1 ≦ 2.4L1.
The third flow path surface P3 is provided on the downstream side of the second flow path surface P2. The flow path shape 230 of the third flow path surface P3 is a circular shape having a diameter of L4, and assuming that the area is S3, L1 = L4 and S1 = S3 are set in the present embodiment.

The second flow path portion 202 connects the second flow path surface P2 and the third flow path surface P3. The area of the flow path perpendicular to the flow direction X gradually shrinks from the third flow path surface P3 toward the second flow path surface P2. In other words, the area of the flow path perpendicular to the distribution direction X gradually expands from the second flow path surface P2 toward the third flow path surface P3.
Further, in the present embodiment, the length D2 between the second flow path surface P2 and the third flow path surface P3 along the flow direction X of the slurry is set to the same length as D1.

(Example)
Next, the flow path structure 200 of this embodiment will be described in detail with reference to Examples.
(Examples 1 to 4, Comparative Examples 1 to 4)
In the pipe 240 of the above embodiment, the fluid analysis was performed by changing the ratio of S2 to S1. FIG. 3 is a diagram showing a table of results of Examples 1 to 4 and Comparative Examples 1 to 4. In the table shown in FIG. 3, the case where the dispersion rate of the slurry in the flow path is 80% or more is shown as good (◯), and the case where the dispersion rate is 60% or more and less than 80% is shown as slightly poor (Δ) and dispersed. When the rate is less than 60%, it is shown as defective (x). In Examples 1 to 4 and Comparative Examples 1 to 4, both the circumference of both the flow path shape in which the flow path area is S1 and the flow path shape in which S2 is formed are formed only by a curved line, and Comparative Example 8 described later. , 9 does not include straight lines.

In Comparative Example 1, as a result of performing fluid analysis with S2 = 0.2 × S1, the dispersion ratio was 52%, which was defective (×).
In Comparative Example 2, as a result of fluid analysis with S2 = 0.4 × S1, the dispersion rate was 74%, which was slightly defective (Δ).

In Example 1, as a result of performing the fluid analysis with S2 = 0.6 × S1, the dispersion ratio was 80%, which was good (◯).
In Example 2, as a result of performing the fluid analysis with S2 = 0.7 × S1, the dispersion rate was 82%, which was good (◯).

In Example 3, as a result of performing the fluid analysis with S2 = 0.8 × S1, the dispersion rate was 84%, which was good (◯).
In Example 4, as a result of performing the fluid analysis with S2 = 0.9 × S1, the dispersion rate was 83%, which was good (◯).

In Comparative Example 3, as a result of fluid analysis with S2 = 1.0 × S1, the dispersion rate was 69%, which was slightly defective (Δ).
In Comparative Example 4, as a result of fluid analysis with S2 = 1.2 × S1, the dispersion ratio was 58%, which was defective (×).
From Examples 1 to 4 and Comparative Examples 1 to 4, it can be seen that 0.6 × S1 ≦ S2 ≦ 0.9 × S1 is preferable.

(Examples 5 to 12, Comparative Examples 5 to 7)
In Examples 5 to 12 and Comparative Examples 5 to 7, the ratio of the distance D1 between the first flow path surface P1 having the flow path area S1 and the second flow path surface P2 having the flow path area S2 to L1 is changed. Fluid analysis was performed. FIG. 4 is a diagram showing a table of results of Examples 5 to 12 and Comparative Examples 5 to 7. In the table shown in FIG. 4, the case where the dispersion rate of the slurry in the flow path is 80% or more is shown as good (◯), and the case where the dispersion rate is 60% or more and less than 80% is shown as slightly poor (Δ) and dispersed. When the rate is less than 60%, it is shown as defective (x). In Examples 5 to 12 and Comparative Examples 5 to 7, both the circumferences of the flow path shape in which the flow path area is S1 and the flow path shape in which S2 is formed are formed only by a curved line, and Comparative Example 8 described later. , 9 does not include straight lines.

In Comparative Example 5, as a result of fluid analysis with D1 = 0.2 × L1, the dispersion ratio was 58%, which was defective (×).
In Comparative Example 6, as a result of fluid analysis with D1 = 0.5 × L1, the dispersion rate was 67%, which was slightly defective (Δ).

In Example 5, as a result of fluid analysis with D1 = 0.7 × L1, the dispersion rate was 80%, which was good (◯).
In Example 6, as a result of fluid analysis with D1 = 0.9 × L1, the dispersion ratio was 80%, which was good (◯).

In Example 7, as a result of fluid analysis with D1 = 1.0 × L1, the dispersion rate was 81%, which was good (◯).
In Example 8, as a result of fluid analysis with D1 = 1.5 × L1, the dispersion rate was 85%, which was good (◯).

In Example 9, as a result of fluid analysis with D1 = 1.8 × L1, the dispersion rate was 83%, which was good (◯).
In Example 10, as a result of fluid analysis with D1 = 2.0 × L1, the dispersion rate was 76%, which was good (◯).

In Example 11, as a result of performing the fluid analysis with D1 = 2.2 × L1, the dispersion rate was 70%, which was good (◯).
In Example 12, as a result of performing the fluid analysis with D1 = 2.4 × L1, the dispersion rate was 62%, which was good (◯).

In Comparative Example 7, as a result of fluid analysis with D1 = 2.5 × L1, the dispersion rate was 59%, which was slightly defective (Δ).
From Examples 5 to 12 and Comparative Examples 5 to 7, it can be seen that 0.7 × L1 ≦ D1 ≦ 2.4 × L1 is preferable.

(Example 13, Comparative Examples 8 and 9)
In Example 13 and Comparative Examples 8 and 9, fluid analysis was performed by changing the ratio of the curved portion of the flat flow path shape 220 on the second flow path surface P2.

FIG. 5A is a diagram showing a table of results of Example 13 and Comparative Examples 8 and 9. In the table shown in FIG. 5A, the case where the dispersion rate of the slurry in the flow path is 80% or more is shown as good (◯), and the case where the dispersion rate is 60% or more and less than 80% is regarded as slightly defective (Δ). The case where the dispersion ratio is less than 60% is shown as defective (x).

FIG. 5B is a diagram showing a flow path shape 2100 of the second flow path surface P2 of Comparative Example 8, and FIG. 5C shows a flow path shape 2200 of the second flow path surface P2 of Comparative Example 9. FIG. 5D is a diagram showing a flow path shape 220 of the second flow path surface P2 of the thirteenth embodiment.

In Comparative Example 8, as a result of fluid analysis using the flow path shape on the second flow path surface P2 as the flow path shape 2100 formed only by straight lines, the dispersion rate was 55%, which was defective (x). .. In Comparative Example 9, as a result of fluid analysis using the flow path shape on the second flow path surface P2 as the flow path shape 2200 formed by a straight line having a circumference of 50% and a curve having a circumference of 50%, the dispersion rate was 72%. It was slightly defective (△).

In Example 13, as a result of fluid analysis using the flow path shape on the second flow path surface P2 as the flow path shape 220 in which the circumference is formed only by a curved line as in the above-described embodiment, the dispersion rate is 86%. , Good (○).

From the above results, it can be seen that it is preferable that the peripheral edge of the flow path shape on the second flow path surface P2 is formed to be curved.
(Embodiment 2)
Next, the joint 300 having the flow path structure 200 according to the second embodiment of the present invention will be described. FIG. 6 is a perspective view showing the joint 300. 7 (a) is a side view showing the joint 300, FIG. 7 (b) is a cross-sectional view of the first flow path surface P1 of FIG. 7 (a), and FIG. 7 (c) is FIG. 7. FIG. 7D is a cross-sectional view taken along the second flow path surface P2 of FIG. 7A, and FIG. 7D is a cross-sectional view of the third flow path surface P3 of FIG. 7A.

The joint 300 is a member having a columnar outer shape and connects between two pipes. The joint 300 has a first pipe connecting portion 301 and a second pipe connecting portion 302 at both ends thereof. The first pipe connection portion 301 and the second pipe connection portion 302 are columnar spaces into which the ends of the pipes are inserted. The flow path structure 200 of the present embodiment is provided between the first pipe connecting portion 301 and the second pipe connecting portion 302.

The surface perpendicular to the flow direction X of the slurry at the end of the flow path structure 200 on the side of the first pipe connection portion 301 is the first flow path surface P1. Further, the surface perpendicular to the flow direction X of the slurry at the end of the flow path structure 200 on the side of the second pipe connection portion 302 is the third flow path surface P3.

Further, the width direction Y and the vertical direction Z are shown in FIGS. 3 and 4. The vertical direction Z is a direction perpendicular to the width direction Y. The vertical direction can be said to be the vertical direction, and the width direction Y can be said to be the horizontal direction. Similar to the first embodiment, the joint 300 is arranged so that L2 in the flow path shape of the second flow path surface P2 is along the horizontal direction.

Although there are differences between the joint 300 and the pipe 240 between the second embodiment and the first embodiment, the flow path shape is the same as that of the first embodiment, and the flow path structure 200 is the same as that of the first embodiment. ing.

That is, the second flow path surface P2 is arranged between the first flow path surface P1 and the third flow path surface P3. The flow path shape 210 of the first flow path surface P1 is a circular shape having a diameter of L1. The area of the flow path shape 210 of the first flow path surface P1 is S1. The flow path shape 220 of the second flow path surface P2 is a flat shape, the longest length in the width direction Y is L2, and the longest length in the vertical direction Z is L3. The area of the flow path shape 220 of the second flow path surface P2 is S2. The flow path shape 230 of the third flow path surface P3 is a circular shape having a diameter of L4. The area of the flow path shape 230 of the third flow path surface P3 is S3. The length of the first flow path surface P1 and the second flow path surface P2 along the distribution direction X is D1, and the length of the second flow path surface P2 and the third flow path surface P3 is D2. L1, L2, L3, L4, D1, D2, S1, S2 and S3 satisfy the same conditions as in the first embodiment.

(Embodiment 3)
Next, the diaphragm valve 10 having the flow path structure 200 according to the present invention will be described.

<Composition>
FIG. 8 is an external perspective view of the diaphragm valve 10 according to the embodiment of the present invention. FIG. 9 is a partial cross-sectional configuration diagram of the diaphragm valve 10 of the present embodiment.

As shown in FIGS. 8 and 9, the diaphragm valve 10 of the present embodiment includes a valve body 11, a diaphragm 12, a bonnet 13, and a drive mechanism 14. Piping is connected to both ends of the valve body 11, and a flow path 24 through which a fluid flows is formed in the valve body 11. The diaphragm 12 opens or shuts off 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 arranged in the bonnet 13 and drives the diaphragm 12.

(Valve body 11)
FIG. 10 is a perspective view of the valve body 11 as viewed from the first surface 31 side, which will be described later. FIG. 11 is a perspective view of the valve body 11 as viewed from the second surface 32 side, which will be described later. FIG. 12 is a front view of the valve body 11, and FIG. 13 is a bottom view of the valve body 11. FIG. 14 is a cross-sectional view taken along the line between AA'in FIG. 13, and FIG. 14 is a cross-sectional view of the center of the valve body 11 in the width direction. Further, FIG. 14 is left-right reversed from FIG.

The valve body 11 is a PVC (polyvinyl chloride), HT (heat resistant vinyl chloride tube), PP (polypropylene), or PVCF (polyfluoride bunilidene), polystyrene, ABS resin, polytetrafluoroethylene, perfluoroalkyl vinyl ether copolymer. , Polychlorotrifluoroethylene and other resins, or metals such as iron, copper, copper alloys, brass, aluminum and stainless steel, or porcelain.

As shown in FIG. 10, 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 first end portion 21, the second end portion 22, and the central portion 23 are integrally formed, and the flow path 24 has the first end portion 21, the central portion 23, and the second end as shown in FIG. It is formed over the portions 22.

(1st end 21, 2nd end 22)
As shown in FIGS. 10 and 11, 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. 11, the first end portion 21 has a first flange portion 211 to which the pipe is connected, and a first connection portion 212 connecting the first flange portion 211 and the central portion 23. As shown in FIG. 11, the first flange portion 211 has a first flange surface 213 on which an inlet 24a through which a fluid flows into the valve body 11 is formed, and a pipe can be connected to the first flange portion 211.

Further, as shown in FIG. 11, the second end portion 22 has a second flange portion 221 to which the pipe is connected, and a second connecting portion 222 connecting the second flange portion 221 and the central portion 23. As shown in FIG. 10, the second flange portion 221 has a second flange surface 223 on which an outlet 24b through which a fluid is discharged from the valve body 11 is formed, and a pipe can be connected to the second flange portion 221.

The first flange portion 211 and the second flange portion 221 are arranged so as to face each other as shown in FIGS. 10 and 11, and the first flange surface 213 and the second flange surface 223 are arranged as shown in FIG. They are formed so as to face each other and be parallel to each other. Further, the position of the inlet 24a and the position of the outlet 24b are also opposed to each other.

(Central part 23)
As shown in FIG. 12, the central portion 23 is provided between the first end portion 21 and the second end portion 22. The central portion 23 has a first surface 31, a second surface 32, a wall portion 33 (see FIG. 14), and a rib 34.

As shown in FIG. 10, the first surface 31 has a substantially planar shape, 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 peripheral edge of the opening 31a is curved. The direction along the line connecting the inlet 24a and the outlet 24b is defined as the first direction X (which can also be said to be the flow direction X of the slurry), and the direction perpendicular to the first direction X and parallel to the first surface 31 is the second. The direction Y (also called the width direction Y). The first direction X can be said to be a direction along a straight line perpendicular to the first flange surface 213 and the second flange surface 223.

As shown in FIG. 12, 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 of the central portion 23 opposite to the side on which the bonnet 13 is arranged.

(Flow path 24)
As shown in FIG. 14, the flow path 24 is formed from the inlet 24a to the outlet 24b. The wall portion 33 is formed in the center of the flow path 24 so as to project toward the first surface 31. 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. A diaphragm 12, which will be described later, is pressed against the tip 33a on the first surface 31 side of the wall 33.

The flow path 24 includes an inlet side flow path 241 formed from the inlet 24a of the first end 21 to the tip 33a, and an outlet side flow path 241 formed from the outlet 24b of the second end 22 to the tip 33a. It has a 242 and a communication portion 243 that communicates the inlet side flow path 241 and the outlet side flow path 242.

The inner peripheral surface of the inlet-side flow path 241 is curved, and as shown in FIG. 14, the width in the direction perpendicular to the first surface 31 becomes narrower toward 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. 14) becomes wider toward the wall portion 33.

The outlet side flow path 242 is formed from the outlet 24b of the second flange portion 221 to the tip portion 33a. The inner peripheral surface of the outlet side flow path 242 is formed to be curved, and as shown in FIG. 14, the width in the direction perpendicular to the first surface 31 becomes narrower toward the wall portion 33. On the other hand, the width of the outlet-side flow path 242 in the direction parallel to the first surface 31 (the direction perpendicular to the paper surface in FIG. 8) becomes wider toward the wall portion 33.

The communication portion 243 is a portion of the flow path 24 on the first surface 31 side of the wall portion 33, and communicates the inlet side flow path 241 and the outlet side flow path 242.
As shown in FIG. 11, 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. The inlet side curved portion 321 and the outlet side curved portion 322 form a protrusion of the wall portion 33 shown in FIG. 14 toward the first surface 31 side.

The flow path 24 has a flow path structure 200. 15 (a) is a diagram showing the first flow path surface P1 of FIG. 14, FIG. 15 (b) is a diagram showing the second flow path surface P2 of FIG. 14, and FIG. 15 (c) is a diagram. It is a figure which shows the 3rd flow path surface P3 of 14.

As shown in FIGS. 14 and 15 (a), the first flow path surface P1 of the flow path structure 200 corresponds to the position of the first flange surface 213, and the flow path shape 210 of the first flow path surface P1 is circular. Yes, it corresponds to the entrance 24a.

As shown in FIGS. 14 and 15 (c), the third flow path surface P3 of the flow path structure 200 corresponds to the position of the second flange surface 223, and the flow path shape 230 of the third flow path surface P3 is circular. Corresponds to the exit 24b.

The first flow path portion 201 corresponds to the inlet side flow path 241 and the second flow path portion 202 corresponds to the outlet side flow path 242.
As shown in FIGS. 14 and 15 (b), the second flow path surface P2 passes through the tip portion 33a of the wall portion 33 and corresponds to a surface parallel to the first flange surface 213 and the second flange surface 223. The second flow path surface P2 is formed by the diaphragm 12 and the valve body 11. The flow path shape 220 is flat when the diaphragm 12 is open, the longest length of the width Y in the left-right direction is L2, and the longest length in the vertical direction Z is L3. In the flow direction X from the inlet 24a to the outlet 24b, as shown in FIG. 14, the length between the first flow path surface P1 and the second flow path surface P2 is D1, and the second flow path surface P2 and the third flow path surface P3. The length between them is D2. Further, the area of the flow path shape 210 on the first flow path surface P1 is S1, the area of the flow path shape 230 on the second flow path surface P2 is S2, and the area of the flow path shape 230 on the third flow path surface P3 is S3. .. L1, L2, L3, L4, D1, D2, S1, S2 and S3 satisfy the same conditions as in the first embodiment.

(Rib 34)
As shown in FIGS. 5 and 7, the rib 34 is formed so as to project from the second surface 32 perpendicularly to the first surface 31. The rib 34 has a first rib 41 and a second rib 42.

As shown in FIGS. 12 and 14, the first rib 41 is formed from the inlet side curved portion 321 to the outlet side curved portion 322 on the second surface 32 along the first direction X. Further, the first rib 41 is provided at the center of the central portion 23 in the second direction Y.

The second rib 42 is formed along the second direction Y and is provided at the center of the central portion 23 in the first direction X.
Further, an outer edge portion 39 is formed from each end of the first surface 31 in the second direction Y toward the second surface 32 side, and the second rib 42 is formed from one outer edge portion 39 to the other outer edge portion 39. Is formed up to.
The first rib 41 and the second rib 42 intersect in a cross shape in a plan view as shown in FIG. 12 at the central portion 43, which is the center of each.

(Diaphragm 12)
The material of the diaphragm 12 may be any rubber-like elastic body, and is not particularly limited. For example, ethylene propylene rubber, isoprene rubber, chloroprene rubber, chlorosulphonized rubber, nitrile rubber, styrene butadiene rubber, chlorinated polyethylene, fluororubber, EPDM (ethylene / propylene / diene rubber), PTFE (polytetrafluoroethylene) and the like are suitable. It is mentioned as a material. Further, a reinforcing cloth having high strength may be inserted into the diaphragm 12, and it is desirable that the reinforcing cloth is made of nylon. This is preferable because it is possible to prevent deformation or breakage of the diaphragm 12 when a fluid pressure is applied to the diaphragm 12 when the diaphragm valve is closed.

As shown in FIG. 9, the diaphragm 12 is arranged on the first surface 31 so as to close the opening 31a. The outer peripheral edge portion 121 of the diaphragm 12 is sandwiched between the bonnet 13 and the valve body 11, which will be described later.

The diaphragm 12 moves downward by a drive mechanism 14 described later, and abuts on the tip 33a of the wall 33 to close the communication portion 243 and close the flow path 24. Further, the diaphragm 12 is moved upward by the drive mechanism 14, and the diaphragm 12 is separated from the tip portion 33a, so that the flow path 24 is opened.

(Bonnet 13)
Similar to the valve body 11, the bonnet 13 is made of PVC (polyvinyl chloride), HT (heat resistant vinyl chloride tube), PP (polypropylene), or PVCF (polyfluoride bunilidene), polystyrene, ABS resin, polytetrafluoroethylene, par. It can be formed of a fluoroalkyl vinyl ether copolymer, a resin such as polychlorotrifluoroethylene, a metal such as iron, copper, copper alloy, brass, aluminum, or stainless steel, or porcelain.

As shown in FIG. 8, the bonnet 13 is fixed to the first surface 31 of the valve body 11 by bolts 100 or the like. The bonnet 13 is provided 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 has a through hole 13b in which the sleeve 62 and the stem 63, which will be described later, are arranged at positions facing the opening 13a.

(Drive mechanism 14)
The drive mechanism 14 includes 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. An engaging member 65 is embedded in the diaphragm 12, and the engaging member 65 projects to the opposite side (non-contact surface side) of the valve body 11. The protruding portion of the engaging member 65 is engaged with the compressor 61, and the compressor 61 and the diaphragm 12 are connected to each other.

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 located inside the sleeve 62 and is screwed into a screw shape formed inside the sleeve 62. A compressor 61 is fixed to an end of the stem 63 arranged inside the bonnet 13. The compressor 61 is engaged with the diaphragm 12 on the valve body 11 side and fixed to the stem 63 on the side opposite to the valve body 11.
The handle 64 is fitted to the outer peripheral portion of the portion of the stem 63 located outside the bonnet 13.

<Operation>
Next, the operation of the diaphragm valve 10 of the present embodiment will be described. 16 (a) and 16 (b) are diagrams schematically showing the operation of the diaphragm 12.

When the handle 64 is rotated in the direction of closing the flow path 24 from the state where the flow path 24 is open as shown in FIG. 16A, the stem 63 is lowered according to the rotation of the handle 64 (see FIG. 9). .. As the stem 63 descends, the compressor 61 fixed to the end of the stem 63 also descends.

As the compressor 61 descends, the diaphragm 12 is convexly curved toward the second surface 32 side and is pressed against the tip portion 33a of the wall portion 33, as shown in FIG. 16B.
As a result, the flow path 24 of the diaphragm valve 10 is cut off.

On the other hand, when the handle 64 is rotated in the opening direction, the stem 63 rises as the handle 64 rotates. 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. 16A.
As a result, the flow path 24 of the diaphragm valve 10 is opened.

(Change in channel cross-sectional area)
FIG. 17 is a diagram comparing the cross-sectional area of the flow path of the diaphragm valve 10 of the present embodiment with the cross-sectional area of the flow path of the conventional diaphragm valve.

Next, an embodiment according to the present invention will be described with reference to examples.
Distance 0 indicates the inlet of the diaphragm valve. C1 is a graph showing a change in the cross-sectional area of the flow path of the diaphragm valve 10 of the present embodiment, and C2 is a graph showing a change in the cross-sectional area of the flow path of the conventional diaphragm valve 10. Further, the graph C1 shown in FIG. 10 shows up to the tip portion 33a with which the diaphragm 12 abuts, and the graph C2 also shows the portion with which the diaphragm abuts.

As shown in FIG. 17, in the present embodiment, the change in the cross-sectional area of the flow path 24 is gradual and the change width is small as compared with the conventional example. This makes it possible to prevent the slurry from staying.

Further, as shown in (Table) below, the fluids of the diaphragm valve 10 of the present embodiment having the flow path cross-sectional area of the graph of C1 and the conventional diaphragm valve having the flow path cross-sectional area of the graph of C2. The analysis was performed. As a result, in the present embodiment, the dispersion rate was 86%, which was good (◯). On the other hand, in the past, the dispersion rate was 54%, which was defective (x). As described above, it can be seen that, conventionally, the slurry tends to stay.
(table)

(Features, etc.)
(1)
The flow path structure 200 of the present embodiment is a flow path structure through which the slurry flows, and includes a first flow path surface P1, a second flow path surface P2, and a first flow path portion 201 (an example of the flow path portion). , Equipped with. The first flow path surface P1 is perpendicular to the flow direction X of the slurry. The second flow path surface P2 is perpendicular to the flow direction X of the slurry. The first flow path portion 201 communicates with the first flow path surface P1 and the second flow path surface P2, and has a cross-sectional area of a flow path shape perpendicular to the flow direction X from the first flow path surface P1 to the second flow path surface P2. Gradually shrink. The inner diameter of the flow path shape in the width direction Y (an example of the first predetermined direction) on the first flow path surface P1 is L1, and the width direction Y of the flow path shape on the second flow path surface P2 (second parallel to the first predetermined direction). If the inner diameter in the predetermined direction) is L2, then L1 <L2, and if the area of the flow path shape 210 on the first flow path surface P1 is S1 and the area of the flow path shape 220 on the second flow path surface P2 is S2, then S1 > S2.

By changing the shape of the flow path through which the slurry flows in this way, the slurry is mixed in the upper layer portion and the lower layer portion in the flow path, so that the sinking of the slurry due to gravity can be suppressed. Therefore, the retention of the slurry in the pipe can be suppressed.

(2)
In the flow path structure 200 of the present embodiment, the flow path shape 210 on the first flow path surface P1 is circular or flat. The flow path shape 220 on the second flow path surface P2 is flat. The flow path shape 220 on the second flow path surface P2 has a larger flatness than the flow path shape 210 on the first flow path surface P1.

By making the flatness of the flow path shape 220 on the second flow path surface P2 larger than that of the flow path shape 210 on the first flow path surface P1, the width of the height of the flow path shape in the vertical direction gradually becomes narrower, and gravity It is possible to suppress the sinking due to.

(3)
In the flow path structure 200 of the present embodiment, assuming that the length between the first flow path surface P1 and the second flow path surface P2 is D1, 0.7L1 ≦ D1 ≦ 2.4L1.
As a result, the sinking of the slurry due to gravity can be suppressed and the retention can be suppressed.

(4)
The flow path structure 200 of the present embodiment further includes a third flow path surface P3. The third flow path surface P3 is perpendicular to the flow direction X of the slurry. The third flow path surface P3 is arranged on the opposite side of the first flow path surface P1 with reference to the second flow path surface P2. The flow path shape 230 on the third flow path surface P3 has the same shape as the flow path shape 210 on the first flow path surface P1. The cross-sectional area of the flow path shape perpendicular to the flow direction gradually shrinks from the third flow path surface P3 toward the second flow path surface P2.
As a result, the sinking of the slurry due to gravity can be suppressed and the retention can be suppressed.

(5)
In the flow path structure 200 of the present embodiment, the cross-sectional area of the flow path shape perpendicular to the flow direction X is gradually reduced toward the second flow path surface P2 on the upstream side and the downstream side of the second flow path surface P2.
As a result, the sinking of the slurry due to gravity can be suppressed and the retention can be suppressed.

[Other Embodiments]
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.

(A)
In the above embodiment, the flow path shape 210 on the first flow path surface P1 is circular, but may be flat. In this case, the flow path shape 210 is formed so that the longest diameter in the flat shape is parallel to L2 of the flow path shape 220 on the second flow path surface P2. Further, it is preferable that the flow path shape 220 on the second flow path surface P2 has a larger flatness than the flow path shape 210 on the first flow path surface P1.

(B)
In the above embodiment, the structure from the second flow path surface P2 to the first flow path surface P1 and the structure from the second flow path surface P2 to the third flow path surface P3 are symmetrical with respect to the second flow path surface P2. However, the present invention is not limited to this, and may be asymmetrical.

(C)
In the above embodiment, the flow path shape of the first flow path surface P1 and the flow path shape of the third flow path surface P3 are circular shapes having the same diameter (L1 = L3), but L1 <L3 or L1> L3. May be good. For example, in the case of the joint of the second embodiment, it may be a joint having a different diameter.

The flow path structure of the present invention exerts an effect of suppressing the retention of slurry in the flow path, and is useful as a pipe, a joint, a diaphragm valve, or the like.

200 Flow path structure 201 First flow path 210 Flow path shape 220 Flow path shape P1 First flow path surface P2 Second flow path surface

Claims (5)

It is a flow path structure through which the slurry flows.
A first flow path surface perpendicular to the flow direction of the slurry,
A second flow path surface perpendicular to the flow direction of the slurry,
A first flow path portion that communicates with the first flow path surface and the second flow path surface, and the area of the flow path shape perpendicular to the distribution direction gradually shrinks from the first flow path surface toward the second flow path surface. With,
Assuming that the inner diameter of the flow path shape on the first flow path surface in the first predetermined direction is L1 and the inner diameter of the flow path shape on the second flow path surface in the second predetermined direction parallel to the first predetermined direction is L2, L1 <L2,
Assuming that the area of the flow path shape on the first flow path surface is S1 and the area of the flow path shape on the second flow path surface is S2, S1> S2.
Channel structure. The shape of the flow path on the first flow path surface is circular or flat.
The flow path shape on the second flow path surface is flat and flat.
The flow path shape on the second flow path surface has a larger flatness than the flow path shape on the first flow path surface.
The flow path structure according to claim 1. Assuming that the length between the first flow path surface and the second flow path surface is D1, 0.7L1 ≦ D1 ≦ 2.4L1.
The flow path structure according to claim 1 or 2. A third flow path surface perpendicular to the flow direction of the slurry is provided.
The third flow path surface is provided on the side opposite to the first flow path surface with reference to the second flow path surface.
The flow path shape on the third flow path surface is the same as the flow path shape on the first flow path surface.
The area of the flow path shape perpendicular to the flow direction gradually shrinks from the third flow path surface toward the second flow path surface.
The flow path structure according to claim 1 or 2. On the upstream side and the downstream side of the second flow path surface, the area of the flow path shape perpendicular to the distribution direction gradually shrinks toward the second flow path surface.
The flow path structure according to any one of claims 1 to 4.

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