KR20200067207A - Euro 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 face P1 and the second flow path face P2, and flows from the first flow path face P1 toward the second flow path face P2 in the direction X ), the area of the flow path perpendicular to the axis is dotted. If the inner diameter of the width direction Y of the flow path shape in the first flow path surface P1 is L1, and the inner diameter of the width direction Y of the flow path shape in the second flow path surface P2 is L2, If L1 <L2, and the area of the flow path shape 210 in the first flow path surface P1 is S1, and the area of the flow path shape 220 in the second flow path surface P2 is S2, S1 > It is S2.

Description

Euro structure

The present invention relates to a flow path structure.

Slurry may be distributed in flow paths in plants such as food and chemicals (for example, see Patent Document 1).

In the recycling system for food recycling resources shown in Patent Document 1, waste energy is recovered and reused by linking the processing of food recycling resources such as collected food waste to a biogasification cogeneration system.

In this recycling system, foreign matter is removed from the input food circulation resource and a pulverization slurrying treatment is performed, and the pulverizing slurry is adjusted in a slurry tank and then introduced into a bioreactor.

Japanese Patent Application Publication No. 2004-148217

However, when the slurry was transported through the flow path, there was a case where the slurry settled by gravity in the flow path and the slurry stayed.

An object of the present invention is to provide a flow path structure capable of suppressing the retention of slurry in the flow path.

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 is dotted. If the inner diameter of the first predetermined direction of the flow path shape on the first flow path surface is L1, and the inner diameter of the second predetermined direction parallel to the first predetermined direction of the flow path shape on the second flow path surface is L2, L1 <L2, and when the area of the flow path shape in the first flow path surface is S1 and the area of the flow path shape in the second flow path surface is S2, S1>S2.

In this way, by changing the shape of the flow path through which the slurry flows, the slurry is mixed in the upper and lower layers in the flow path, so that settlement due to gravity of the slurry can be suppressed. Therefore, the retention of slurry in piping can be suppressed.

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

When the flatness of the flow path shape on the second flow path surface is larger than that of the flow path shape on the first flow path surface, the width of the height in the vertical direction of the flow path shape is gradually narrowed, so that settlement due to gravity can be suppressed. .

The flow path structure according to the third invention is a flow path structure according to the first or second invention, and when the length between the first flow path surface and the second flow path surface is D1, 0.7L1 ≤ D1 ≤ 2.4L1.

Thereby, settlement by gravity of the slurry can be suppressed, and retention can be suppressed.

The flow path structure according to the fourth invention is a 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 disposed 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 shape as the flow path shape on the first flow path surface. The area of the flow path shape perpendicular to the flow direction from the third flow path surface to the second flow path surface is dotted.

Thereby, settlement by gravity of the slurry can be suppressed, and retention can be suppressed.

The flow path structure according to the fifth invention is a flow path structure according to any one of the first to third inventions, and has a flow path shape perpendicular to the flow direction toward the second flow path surface on the upstream side and the downstream side of the second flow path surface. The area is dotted.

Thereby, settlement by gravity of the slurry can be suppressed, and retention can be suppressed.

ADVANTAGE OF THE INVENTION According to this invention, the flow path structure which can suppress the retention of the slurry in a flow path can be provided.

1 is (a) is a side view showing the piping using the flow path structure of Embodiment 1 according to the present invention, and (b) is a plan view of FIG. 1(a).
2(a) is a cross-sectional view of the first flow path surface of FIGS. 1(a) and 1(b), and (b) is a second flow path surface of FIGS. 1(a) and 1(b). The sectional view in (c) is a sectional view in the third flow path surfaces of Figs. 1(a) and 1(b).
3 is a diagram showing a table of results of Examples 1 to 4 and Comparative Examples 1 to 4.
4 is a diagram showing a table of results of Examples 5 to 12 and Comparative Examples 5 to 7.
5 is (a) is a diagram showing a table of results of Example 6 and Comparative Examples 8 and 9, (b) is a diagram showing a flow path shape of the second flow path surface of Comparative Example 8, (c) is a comparative example 9 is a view showing the flow path shape of the second flow path surface, and (d) is a view showing the flow path shape of the second flow path surface in Example 13.
6 is a perspective view showing a seam using the flow path structure of Embodiment 2 according to the present invention.
FIG. 7 is (a) is a side view of the seam of FIG. 6, (b) is a sectional view of the first flow path surface of FIG. 7(a), and (c) is a second flow path surface of FIG. 7(a). And (d) are cross-sectional views of the third flow path surface of Fig. 7(a).
8 is a perspective view of a diaphragm valve using the flow path structure according to Embodiment 3 of the present invention.
9 is a partial cross-sectional view of the diaphragm valve of FIG. 8.
10 is a perspective view of the valve body of FIG. 8 when viewed from above.
11 is a perspective view of the valve body of FIG. 8 when viewed from below.
12 is a front view of the valve body of FIG. 8.
13 is a bottom view of the valve body of FIG. 8.
14 is a cross-sectional view indicated by arrows between AA′ in FIG. 7.
Fig. 15 is a diagram showing (a) a first flow path surface in Fig. 14, (b) a sectional view of a second flow path surface in Fig. 14, and (c) a drawing showing a third flow path surface in Fig. 14. .
Fig. 16 is 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 channel is opened.
17 is a diagram showing a graph of changes in the cross-sectional area of the diaphragm valve of the present embodiment and the conventional diaphragm valve.

Hereinafter, a flow path structure according to the present invention will be described with reference to the drawings.

(Embodiment 1)

Hereinafter, the flow path structure in Embodiment 1 according to the present invention will be described.

1(a) is a side view showing a pipe 240 having a flow path structure 200 according to the first embodiment. 1( b) is a plan view of a pipe 240 having a flow path structure 200. Fig. 2(a) is a cross-sectional view of the first flow path surface P1 of Figs. 1(a) and 1(b), and Fig. 2(b) shows Figs. 1(a) and 1(b). It is sectional drawing in the 2nd flow path surface P2, and FIG. 2(c) is sectional drawing in the 3rd flow path surface P3 of FIG. 1(a) and FIG. 1(b).

1(a) and 1(b), the pipe 240 has a flow path structure 200. The 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. It is provided.

The flow path structure 200 is formed between the pipes 240 and is formed to suppress the retention of the slurry. In the flow path structure 200 of this embodiment, the outer diameter of the pipe 240 is kept constant and is formed by changing the flow path shape by changing the 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. In addition, the vertical direction may also be referred to as a vertical direction, and the width direction Y may also be referred to as a horizontal direction.

The first flow path surface P1 is 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 in the first flow path surface P1 is a circular shape having a diameter L1. Since the flow path shape in 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 is a cross section perpendicular to the flow direction X of the slurry, and is located downstream 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 diameter L3. L2> L3. Moreover, the diameter L2 is larger than L1, and the diameter L3 is smaller than the diameter L1.

Moreover, when the area of the flow path shape of the first flow path surface P1 is S1 and the flow path shape of the second flow path surface P2 is S2, S2 &lt; S1 is set.

The first flow path portion 201 connects the first flow path surface P1 and the second flow path surface P2, and gradually flows from the first flow path surface P1 toward the second flow path surface P2 ( The area of the channel shape perpendicular to X) is dotted.

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 formed downstream 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 if the area is S3, L1 = L4 in this embodiment, and S1 = S3.

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 decreases 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 flow direction X gradually increases 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 is explained in detail using an Example.

(Examples 1 to 4, Comparative Examples 1 to 4)

In the piping 240 of the above-described embodiment, fluid analysis was performed by changing the ratio of S2 to S1. 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 indicated as good (○), and the case where the dispersion rate is 60% or more and less than 80% is indicated as slightly defective (Δ), and the dispersion rate is less than 60%. The case is indicated as defective (×). Further, in Examples 1 to 4 and Comparative Examples 1 to 4, the circumferences of both of the flow path area of S1 and the flow path shape of S2 are all formed only in a curve, and the straight lines as Comparative Examples 8 and 9 described later. Did not include.

In Comparative Example 1, fluid analysis was performed as S2 = 0.2 x S1, resulting in a dispersion ratio of 52% and a defect (x).

In Comparative Example 2, when fluid analysis was performed as S2 = 0.4 x S1, the dispersion ratio became 74%, resulting in a slight defect (Δ).

In Example 1, when fluid analysis was performed as S2=0.6xS1, the dispersion ratio became 80%, and it became favorable (○).

In Example 2, when the fluid analysis was performed as S2 = 0.7 x S1, the dispersion ratio became 82%, and it was favorable (○).

In Example 3, when fluid analysis was performed as S2 = 0.8 x S1, the dispersion ratio was 84%, and it was favorable (○).

In Example 4, the fluid analysis was performed as S2 = 0.9 x S1, and as a result, the dispersion ratio was 83%, which was good (○).

In Comparative Example 3, when the fluid analysis was performed as S2 = 1.0 x S1, the dispersion ratio became 69%, resulting in a slight defect (Δ).

In Comparative Example 4, when fluid analysis was performed as S2 = 1.2 x S1, the dispersion ratio was 58%, resulting in defects (x).

From Examples 1-4 and Comparative Examples 1-4, it turns out that 0.6xS1 <S2 <0.9xS1 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 to L1 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 is changed, Fluid analysis was performed. 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 ratio of the slurry in the flow path is 80% or more is indicated as good (○), the case where the dispersion rate is 60% or more and less than 80% is indicated as slightly defective (Δ), and the dispersion rate is less than 60%. The case is indicated as defective (×). Moreover, in Examples 5-12 and Comparative Examples 5-7, the periphery of both the flow path shape of the flow path area S1 and the flow path shape of S2 is formed only by curves, and a straight line like Comparative Examples 8 and 9 mentioned later. Did not include.

In Comparative Example 5, fluid analysis was performed as D1 = 0.2 x L1, resulting in a dispersion ratio of 58%, resulting in defects (x).

In Comparative Example 6, when the fluid analysis was performed as D1 = 0.5 x L1, the dispersion ratio was 67%, resulting in a slight defect (Δ).

In Example 5, when the fluid analysis was performed as D1 = 0.7 x L1, the dispersion ratio was 80%, which was good (○).

In Example 6, when the fluid analysis was performed as D1 = 0.9 x L1, the dispersion ratio was 80%, and it was good (○).

In Example 7, when the fluid analysis was performed as D1 = 1.0 x L1, the dispersion ratio was 81%, which was good (○).

In Example 8, when the fluid analysis was performed as D1 = 1.5 x L1, the dispersion ratio was 85%, and it was good (○).

In Example 9, when the fluid analysis was performed as D1 = 1.8 x L1, the dispersion ratio was 83%, which was good (○).

In Example 10, when the fluid analysis was performed as D1 = 2.0 x L1, the dispersion ratio was 76%, which was good (○).

In Example 11, as a result of performing fluid analysis as D1 = 2.2 x L1, the dispersion ratio was 70%, which was good (○).

In Example 12, when the fluid analysis was performed as D1 = 2.4 x L1, the dispersion ratio was 62%, and it was good (○).

In Comparative Example 7, fluid analysis was performed as D1 = 2.5 x L1, resulting in a dispersion ratio of 59% and a slight defect (Δ).

From Examples 5-12 and Comparative Examples 5-7, it turns out that 0.7xL1<D1<2.4xL1 is preferable.

(Example 13, Comparative Examples 8, 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.

5(a) is a diagram showing a table of results of Example 13 and Comparative Examples 8 and 9. In the table shown in Fig. 5(a), the case where the dispersion ratio 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 indicated as slightly defective (Δ), and the dispersion rate is The case of less than 60% is indicated as defective (×).

Fig. 5(b) is a view showing the flow path shape 2100 of the second flow path surface P2 in Comparative Example 8, and Fig. 5(c) is a flow path shape of the second flow path surface P2 in Comparative Example 9 It is a figure which shows 2200, and FIG. 5(d) is a figure which shows the flow path shape 220 of the 2nd flow path surface P2 of Example 13. FIG.

In Comparative Example 8, the fluid analysis was conducted using the flow path shape on the second flow path surface P2 as the flow path shape 2100 formed only around a straight line, resulting in a dispersion ratio of 55%, resulting in a defect (×). Became. In Comparative Example 9, when the fluid analysis was performed with the flow path shape on the second flow path surface P2 as a flow path shape 2200 formed by a 50% straight line and a 50% curve, the dispersion ratio was 72%. It became slightly defective (△).

In Example 13, the fluid analysis was conducted using the flow path shape on the second flow path surface P2 as a flow path shape 220 formed only by a curved line as in the above-described embodiment. As a result, the dispersion ratio was 86%. It became good (○).

From the above results, it can be seen that the circumferential edge of the flow path shape in the second flow path surface P2 is preferably formed by being curved.

(Embodiment 2)

Next, the seam 300 having the flow path structure 200 of Embodiment 2 according to the present invention will be described. 6 is a perspective view showing the seam 300. Fig. 7(a) is a side configuration diagram showing the seam 300, Fig. 7(b) is a sectional view of the first flow path surface P1 in Fig. 7(a), and Fig. 7(c) is , It is sectional drawing in the 2nd flow path surface P2 of FIG. 7(a), and FIG. 7(d) is sectional drawing in the 3rd flow path surface P3 of FIG. 7(a).

The seam 300 is a cylindrical-shaped member and connects between two pipes. The seam 300 has a first pipe connection portion 301 and a second pipe connection portion 302 at both ends. The 1st pipe connection part 301 and the 2nd pipe connection part 302 are cylindrical spaces, and the end of a pipe is inserted. The flow path structure 200 of the present embodiment is formed between the first pipe connection portion 301 and the second pipe connection 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 becomes the first flow path surface P1. Moreover, the surface perpendicular to the flow direction X of the slurry at the end of the flow path structure 200 at the second pipe connecting portion 302 side becomes the third flow path surface P3.

In addition, 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. In addition, the vertical direction may also be referred to as a vertical direction, and the width direction Y may also be referred to as a horizontal direction. As in the first embodiment, the seam 300 is disposed such that L2 in the flow path shape of the second flow path surface P2 follows the horizontal direction.

In the second embodiment and the first embodiment, there is a difference between the seam 300 and the pipe 240, but the flow path shape is the same as that of the first embodiment and has the same flow path structure 200 as the first embodiment.

That is, the 2nd flow path surface P2 is arrange|positioned between the 1st flow path surface P1 and the 3rd 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 face P1 and the second flow path face P2 along the flow direction X is D1, and the length of the second flow path face P2 and the third flow path face 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.

<Configuration>

8 is an external perspective view of the diaphragm valve 10 of the embodiment according to the present invention. 9 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 FIG. 8 and FIG. 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)

10 is a perspective view of the valve body 11 seen from the side of the first surface 31 to be described later. 11 is a perspective view of the valve body 11 seen from the second surface 32 side, which will be described later. 12 is a front view of the valve body 11, and FIG. 13 is a bottom view of the valve body 11. 14 is a cross-sectional view indicated by arrows between AA′ in FIG. 13, and FIG. 14 is a cross-sectional view in the center of the valve body 11 in the width direction. In addition, FIG. 14 is inversely opposite to FIG. 12.

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. 10, the valve main 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. 10 and 11, the first end portion 21 and the second end portion 22 are disposed so as to sandwich the central portion 23 therebetween, and are connected to the central portion 23.

As shown in FIG. 11, 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 11, the 1st flange part 211 has the 1st flange surface 213 in which the inlet 24a in which the fluid flows into the valve body 11 is formed, and piping is connectable.

Moreover, as shown in FIG. 11, 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. 10, the second flange portion 221 has a second flange surface 223 on which an outlet 24b through which the fluid is discharged is formed, and piping is connectable.

The 1st flange part 211 and the 2nd flange part 221 are arrange|positioned facing as shown in FIGS. 10 and 11, and the 1st flange surface 213 and the 2nd flange surface 223 are drawings. As shown in 14, 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)

The center part 23 is formed between the 1st edge part 21 and the 2nd edge 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. 14 ), and a rib 34.

As shown in FIG. 10, the first surface 31 is substantially planar 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. In addition, the direction along the line connecting the inlet 24b from the inlet 24a is set as the first direction X (also referred to as the flow direction X of the slurry) and perpendicular to the first direction X The direction parallel to the first surface 31 is also referred to as the second direction Y (also referred to as the width 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.

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 opposite to the side on which the bonnet 13 of the central portion 23 is disposed.

(Euro 24)

The flow path 24 is formed from the inlet 24a to the outlet 24b, as shown in FIG. 14. The wall portion 33 is formed to protrude toward the first surface 31 at the center of the flow path 24. The wall part 33 is formed so that the inner surface of the flow path 24 gently rises 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, which will be described later, is pressed against the front end portion 33a of the wall portion 33 on the first surface 31 side.

The flow path 24 is formed from the inlet 24a of the first end 21 to the tip portion 33a, and the inlet side flow path 241 and the tip portion 33a from 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.

The entrance-side flow path 241 is formed by bending its inner circumferential surface, and as shown in FIG. 14, the width in the direction perpendicular to the first surface 31 is narrowed as it 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 (direction perpendicular to the paper surface in FIG. 14) is widened toward the wall portion 33. .

The outlet side flow passage 242 is formed from the outlet 24b of the second flange portion 221 to the tip portion 33a. The exit-side flow passage 242 is formed by bending its inner circumferential surface, and as shown in FIG. 14, the width in the direction perpendicular to the first surface 31 is narrowed as it faces the wall portion 33. On the other hand, the width of the exit-side flow path 242 in the direction parallel to the first surface 31 (direction perpendicular to the paper in FIG. 8) 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.

11, the inlet side curved portion 321 along the inlet side flow path 241 and the outlet side curved portion 322 along the outlet side flow path 242 are provided. A protrusion to the first surface 31 side of the wall portion 33 shown in FIG. 14 is formed by the inlet-side curved portion 321 and the outlet-side curved portion 322.

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

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 of the first flow path surface P1 The shape 210 is circular, and corresponds to the inlet 24a.

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 of the third flow path surface P3 The shape 230 is circular, and corresponds to the outlet 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.

14 and 15(b), the second flow path surface P2 passes through the tip portion 33a of the wall portion 33, and the first flange surface 213 and the second flange surface 223 Corresponds to a plane parallel to. 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 of the vertical direction Z is L3. In the flow direction X from the inlet 24a toward 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 length between the two flow path surfaces P2 and the third flow path surfaces P3 is D2. In addition, the area of the flow path shape 210 in the first flow path surface P1 is S1, the area of the flow path shape 230 in the second flow path surface P2 is S2, and the third flow path surface is The area of the flow path shape 230 in (P3) is S3. L1, L2, L3, L4, D1, D2, S1, S2 and S3 satisfy the same conditions as in the first embodiment.

(Rib (34))

5 and 7, the ribs 34 are formed to protrude from the second surface 32 perpendicular to the first surface 31. The rib 34 has a first rib 41 and a second rib 42.

12 and 14, 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. 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 39 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 39 to the other outer edge portion 39.

The first ribs 41 and the second ribs 42 cross each other in a planar shape as shown in Fig. 12 in the central portion 43, which is the center of each.

(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 arrange|positioned at the 1st surface 31 so that opening 31a may be blocked as shown in FIG. 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 to close the flow passage 24 by touching the tip portion 33a of the wall portion 33. 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 1st surface 31 of the valve body 11 with the bolt 100 etc., as shown in FIG. 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.

<action>

Next, the operation of the diaphragm valve 10 of this embodiment will be described. 16A and 16B 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. 16(a), the stem 63 is rotated according to the rotation of the handle 64. It descends (see Fig. 9). 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. 16(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. 16(a).

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

(Cross section change)

FIG. 17 is a view in which the cross-sectional area of the flow path of the diaphragm valve 10 of this embodiment is compared with the cross-sectional area of the flow path of a conventional diaphragm valve.

Next, embodiments related to the present invention will be described using examples.

The distance 0 represents the inlet of the diaphragm valve. C1 is a graph showing the change in the cross-sectional area of the flow path of the diaphragm valve 10 of this embodiment, and C2 is a graph showing the change in the cross-sectional area of the flow path of the conventional diaphragm valve. Moreover, the graph C1 shown in FIG. 10 shows to the tip part 33a where the diaphragm 12 abuts, and the graph C2 also shows the part where 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 slower and the change width is smaller than in the conventional example. This makes it possible to prevent the retention of the slurry.

Moreover, as shown in the following (Table), the fluid analysis of the diaphragm valve 10 of this 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 was performed. . As a result, in the present embodiment, the dispersion ratio was 86%, which was good (○). On the other hand, in the prior art, the dispersion ratio became 54%, resulting in defects (x). As described above, it has been found that in the related art, retention of the slurry tends to occur.

[Table 1]

(Features, etc.)

(One)

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 face P1, a second flow path face P2, and a first flow path portion 201 (an example of the flow path portion). To be equipped. 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 face P1 and the second flow path face P2, and flows from the first flow path face P1 toward the second flow path face P2 in the direction X ), the cross-sectional area of the flow path perpendicular to the axis is dotted. The inner diameter of the flow path-shaped width direction Y (an example of the first predetermined direction) on the first flow path surface P1 is L1, and the flow path-shaped width direction on the second flow path surface P2 (Y ) When the inner diameter of (the second predetermined direction parallel to the first predetermined direction) is L2, L1 <L2, the area of the flow path shape 210 in the first flow path surface P1 is S1, and the second When the area of the flow path shape 220 in the flow path surface P2 is S2, S1>S2.

In this way, by changing the shape of the flow path through which the slurry flows, the slurry is mixed in the upper and lower layers in the flow path, so that settlement due to gravity of the slurry can be suppressed. Therefore, the retention of slurry in piping 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 in the second flow path surface P2 has a greater flatness than the flow path shape 210 in the first flow path surface P1.

When the flow path shape 220 in the second flow path surface P2 is larger than the flow path shape 210 in the first flow path surface P1, the width of the height in the vertical direction of the flow path shape is gradually increased. It becomes narrow, and the settlement by gravity can be suppressed.

(3)

In the flow path structure 200 of the present embodiment, when the length between the first flow path surface P1 and the second flow path surface P2 is D1, 0.7L1 ≤ D1 ≤ 2.4L1.

Thereby, settlement by gravity of the slurry can be suppressed, and retention can be suppressed.

(4)

In the flow path structure 200 of the present embodiment, a third flow path surface P3 is further provided. The third flow path surface P3 is perpendicular to the flow direction X of the slurry. The 3rd flow path surface P3 is arrange|positioned on the opposite side of the 1st flow path surface P1 with respect to the 2nd flow path surface P2. The flow path shape 230 in the third flow path face P3 is the same shape as the flow path shape 210 in the first flow path face P1. The cross-sectional area of the flow path shape perpendicular to the flow direction from the third flow path surface P3 toward the second flow path surface P2 is dotted.

Thereby, settlement by gravity of the slurry can be suppressed, and 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 toward the second flow path surface P2 on the upstream side and the downstream side of the second flow path surface P2 is dotted and have.

Thereby, settlement by gravity of the slurry can be suppressed, and retention can be suppressed.

[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, the flow path shape 210 in the first flow path surface P1 is circular, but may be flat. In this case, the flow path shape 210 is formed such 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. Moreover, it is preferable that the flow path shape 220 in the 2nd flow path surface P2 has a larger flatness ratio than the flow path shape 210 in the 1st flow path surface P1.

(B)

In the above-described embodiment, the structure from the second flow path surface P2 to the first flow path surface P1 with the second flow path surface P2 interposed therebetween, and the third flow path surface P2 to the third flow path surface ( The structure up to P3) is symmetrical, but is not limited to this, and may be asymmetric.

(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 used. For example, in the case of the seam of Embodiment 2, the seam may be different.

Industrial availability

The flow path structure of the present invention exerts an effect capable of suppressing the retention of slurry in the flow path, and is useful as piping, joints, diaphragm valves, and the like.

200: Euro structure
201: 1st Euro part
210: flow path shape
220: flow path shape
P1: 1st flow path
P2: 2nd flow path

Claims (5)

As 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 communicating with the first flow path surface and the second flow path surface, and having an area in the shape of a flow path perpendicular to the flow direction from the first flow path surface to the second flow path surface;
The inner diameter of the first predetermined direction of the flow path shape on the first flow path surface is L1, and the inner diameter of the second predetermined direction parallel to the first predetermined direction of the flow path shape on the second flow path surface is L2. If, 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, the flow path structure is S1>S2. According to claim 1,
The flow path shape on the first flow path surface is circular or flat,
The flow path shape on the second flow path surface is flat,
The flow path structure in the second flow path surface has a larger flatness ratio than the flow path shape in the first flow path surface. The method of claim 1 or 2,
If the length between the first flow path surface and the second flow path surface is D1, the flow path structure is 0.7L1 ≤ D1 ≤ 2.4L1. The method of claim 1 or 2,
It has a third flow path surface perpendicular to the flow direction of the slurry,
The third flow path surface is formed on the side opposite to the first flow path surface based on the second flow path surface,
The flow path shape on the third flow path surface is the same shape as the flow path shape on the first flow path surface,
A flow path structure in which an area of a flow path shape perpendicular to the flow direction from the third flow path face to the second flow path faces is dotted. The method according to any one of claims 1 to 4,
A flow path structure in which an area of a flow path shape perpendicular to the flow direction toward the second flow path faces on the upstream side and the downstream side of the second flow path surface.

Images