JP2019196785A - Swirl flow adjustment device - Google Patents

Abstract

To adjust swirl flow in a flow channel with compact configuration without particularly installing a member in the flow channel.SOLUTION: A swirl flow adjustment device 100 comprises: a first space formation part 10 forming a first space 11; a second space formation part 30 forming a second space 31; and a third space formation part 50 forming a third space 51. The first space 11 includes a first inlet 17 and a first outlet 18, the second space includes a second inlet 33 connected to the first outlet and a second outlet 34. The third space 51 includes: a third inlet 57 connected to the second outlet 34 and a third outlet 58. When a first projection vector represents a vector obtained when a vector directed to the first outlet 18 from the first inlet 17 is projected onto a plane perpendicular to a direction in which the fluid outflows from the third outlet 58, and when a second projection vector represents a vector obtained when a vector directed to the third outlet 58 is projected onto the plane, the direction of the first projection vector is different from the direction of the second projection vector.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a swirling flow adjusting device that adjusts a swirling flow in a flow path.

  Patent Document 1 discloses a swirl flow preventing member provided on a branch pipe vertically suspended from one end of a horizontally arranged mother pipe (see claim 1). The swirl flow preventing member is constituted by, for example, at least one plate-like member installed along the axis of the branch pipe (see claim 2). According to such a configuration, the formation of a swirling flow can be prevented by disrupting the cellular vortex.

JP 2004-270738 A

  Piping for flowing fluid is composed of bent pipes, straight pipes, branch pipes, valves, orifices, joints, and other piping elements. In such a pipe, a swirling flow may be generated downstream of the bent pipe, the branch pipe, and other pipe elements. If a swirl flow is present, accurate measurement becomes difficult when the flow rate is measured by a flow rate measurement unit including an orifice or the like.

  Therefore, when measuring the flow rate downstream of bent pipes, branch pipes, or other piping elements, install a sufficiently long straight pipe upstream of the flow measurement unit to attenuate the swirling flow that occurs. Things have been done. However, since the installation position and configuration of the piping are limited due to the installation space limitation, it may be difficult to install a sufficiently long straight pipe upstream of the flow rate measurement unit.

  In the technique described in Patent Document 1, it is possible to reduce the swirl flow, but since the flow obstructed is inserted and installed in the flow path formed inside the pipe, the flow loss is reduced. It gets bigger. In addition, the plate-like member installed in the pipe may fall off due to changes over time such as corrosion.

  The present invention has been made in view of the above-described circumstances, and provides a swirling flow adjusting device capable of adjusting swirling flow in a flow path with a compact configuration without particularly installing a member in the flow path. Let it be an issue.

  In order to achieve the above object, a swirl flow adjusting device according to the present invention includes a first space forming portion that forms a first space, a second space forming portion that forms a second space, and a third space that forms a third space. 3 space formation part. The first space has a first inlet through which a fluid flows and a first outlet through which a fluid flowing from the first inlet flows out. The second space has a second inlet connected to the first outlet, and a second outlet from which a fluid flowing in from the second inlet flows out. The third space has a third inlet connected to the second outlet, and a third outlet from which a fluid flowing in from the third inlet flows out. Here, a vector obtained by projecting a vector from the first inlet toward the first outlet onto a plane perpendicular to the direction in which fluid flows out from the third outlet is defined as a first projection vector. A vector obtained by projecting a vector from the third entrance to the third exit onto the plane is defined as a second projection vector. In this case, the direction of the first projection vector is different from the direction of the second projection vector.

  ADVANTAGE OF THE INVENTION According to this invention, the swirl | vortex flow adjustment apparatus which can adjust the swirl | vortex flow in a flow path with a compact structure can be provided, without installing a member in a flow path in particular.

It is a perspective view which shows the swirl | vortex flow adjustment apparatus which concerns on 1st Embodiment of this invention with upstream piping and downstream piping. FIG. 2 is an enlarged perspective view of a swirl flow adjusting device shown in FIG. 1. It is a longitudinal cross-sectional view of the swirl | vortex flow adjustment apparatus shown by FIG. It is a figure for demonstrating the adjustment principle of the swirl flow by a swirl flow adjustment apparatus. It is an expansion perspective view of the swirl | vortex flow adjustment apparatus which concerns on 2nd Embodiment of this invention. It is an expansion perspective view of the swirl | vortex flow adjustment apparatus which concerns on 3rd Embodiment of this invention.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
In addition, in each figure, about the same component or the same component, the same code | symbol is attached | subjected and those overlapping description is abbreviate | omitted suitably.

(First embodiment)
First, a first embodiment of the present invention will be described with reference to FIGS.
The pipe through which the fluid flows is composed of a bent pipe, a straight pipe, a branch pipe, a valve, an orifice, a joint, and other pipe elements. Here, the case where the swirl flow adjusting device 100 according to the first embodiment is installed between the upstream pipe 110 having the bent pipes 112 and 114 and the downstream pipe 120 in which the orifice 121 is provided. An example will be described.

FIG. 1 is a perspective view showing a swirl flow adjusting device 100 according to a first embodiment of the present invention, together with an upstream pipe 110 and a downstream pipe 120.
In the present embodiment, the case where the top and bottom in FIG. 1 correspond to the vertical direction is illustrated, but the present invention is not limited to this. The upper and lower sides in FIG. 1 may be, for example, the horizontal direction or an oblique direction with respect to the vertical direction.

  As shown in FIG. 1, the swirl flow adjusting device 100 is installed between the upstream pipe 110 and the downstream pipe 120. The upstream pipe 110, the swirl flow adjusting device 100, and the downstream pipe 120 are formed with a flow path through which a fluid flows, and communicate with each other.

  The upstream side pipe 110 includes two bent pipes 112 and 114 having curved axes, and a straight pipe 113 having a straight axis disposed between the bent pipe 112 and the bent pipe 114. In addition, the upstream pipe 110 includes a straight pipe 111 connected to the upstream side of the bent pipe 112 and a straight pipe 115 connected to the downstream side of the bent pipe 114.

  The downstream pipe 120 is a straight pipe. The downstream pipe 120 is provided with an orifice 121. The orifice 121 is a disc in which a circular hole for narrowing a flow path formed in the downstream pipe 120 is formed in the center. The flow rate is obtained by measuring the differential pressure across the orifice 121.

  The fluid flowing in the upstream pipe 110 passes through the two bent pipes 112 and 114, then enters the swirl flow adjusting device 100, and then flows into the orifice 121 through the downstream pipe 120 that is a straight pipe. However, in FIG. 1, the bent tube 112 and the bent tube 114 are drawn so as to be in the same plane, but either one may be shifted to the front or back of the paper surface of FIG. 1. At this time, the downstream pipe 120 and the swirl flow adjusting device 100 remain in the state shown in FIG. Also, the straight pipe 113 that connects the two bent pipes 112 and 114 may be shifted in front of or behind the paper surface of FIG. 1 or may be inclined in the plane of the paper surface of FIG.

  When the fluid flows in such an upstream side pipe 110, a swirl flow that rotates around an axis (axis line of the upstream side pipe 110) along the flow direction is formed on the downstream side of the bent pipe 114. If the bent pipe 114 and the downstream pipe 120 are directly connected, if the length of the downstream pipe 120 that is a straight pipe is not sufficiently provided, the formed swirling flow enters the orifice 121, Measurement error of flow rate may occur.

  FIG. 2 is an enlarged perspective view of the swirl flow adjusting device 100 shown in FIG. 3 is a longitudinal cross-sectional view of the swirl flow adjusting device 100 shown in FIG. 1, and is a cross-sectional view taken along line III-III in FIG.

  As shown in FIGS. 2 and 3, the swirl flow adjusting device 100 includes a first space forming unit 10 that forms the first space 11, a second space forming unit 30 that forms the second space 31, and a third space 51. The third space forming part 50 is formed. The first space forming unit 10 is connected to the upstream pipe 110. The second space forming unit 30 is disposed on the downstream side of the first space forming unit 10 and is connected to the first space forming unit 10. The third space forming unit 50 is disposed on the downstream side of the second space forming unit 30 and is connected to the second space forming unit 30.

  A first space 11, a second space 31, and a third space 51 serving as a flow path are formed inside each of the first space forming unit 10, the second space forming unit 30, and the third space forming unit 50. ing. That is, the swirl flow adjusting device 100 includes three spaces, a first space 11, a second space 31, and a third space 51.

  The first space forming part 10 includes a first cylindrical part 12 having a cylindrical shape, a first downstream flange 14 having a connection hole 13 connected to the first cylindrical part 12, and a connection hole 15 connected to the upstream pipe 110. And a first upstream flange 16. The first space 11 described above is formed inside the first cylindrical portion 12. The first space 11 has a first inlet 17 through which a fluid flows and a first outlet 18 through which a fluid flowing from the first inlet 17 flows out. The first inlet 17 is connected to the upstream pipe 110 disposed on the upstream side of the first space 11.

  The 2nd space formation part 30 has the 2nd cylindrical part 32 which exhibits a cylindrical shape. The second space 31 described above is formed inside the second cylindrical portion 32. The second space 31 has a second inlet 33 connected to the first outlet 18 and a second outlet 34 from which the fluid flowing in from the second inlet 33 flows out.

  The third space forming part 50 includes a third cylindrical part 52 having a cylindrical shape, a second upstream flange 54 having a connection hole 53 connected to the third cylindrical part 52, and a connection hole 55 connected to the downstream pipe 120. And a second downstream flange 56. The third space 51 described above is formed inside the third cylindrical portion 52. The third space 51 has a third inlet 57 through which a fluid flows and a third outlet 58 through which the fluid flowing from the third inlet 57 flows out. The third outlet 58 is connected to a downstream pipe 120 disposed on the downstream side of the third space 51.

  In the present embodiment, the first space 11, the second space 31, and the third space 51 have a cylindrical shape having a common axis CL. The second inlet 33 and the second outlet 34 are formed at both ends of the second space 31 in the direction of the axis CL. The first inlet 17 is formed at a position eccentric to the axis CL of the second space 31 on the end face on the upstream side (opposite to the second space 31) of the first space 11. The third outlet 58 is formed at a position eccentric to the axis CL of the second space 31 on the end surface on the downstream side (opposite to the second space) of the third space 51. If comprised in this way, the swirl | vortex flow control apparatus 100 will become a rigid, highly rigid and stable structure.

  The first downstream flange 14 and the first upstream flange 16 are screws such as bolts in a state where the upstream end surface of the first downstream flange 14 and the downstream end surface of the first upstream flange 16 are in contact with each other. It is fastened and fixed by the member 71. The screw member 71 is inserted into the screw hole 20 formed in the first upstream flange 16 through the arc-shaped long hole 19 extending along the circumferential direction in the peripheral portion of the first downstream flange 14. It is. A plurality of (here, four) long holes 19 are formed at equal intervals in the circumferential direction. For this reason, the relative position in the circumferential direction of the first downstream flange 14 and the first upstream flange 16 can be changed. That is, the first inlet 17 of the first space 11 is configured to be movable and adjustable in the circumferential direction around the axis CL of the second space 31.

  The second downstream flange 56 and the second upstream flange 54 are screws such as bolts in a state where the upstream end surface of the second downstream flange 56 and the downstream end surface of the second upstream flange 54 are in contact with each other. It is fastened and fixed by the member 71. The screw member 71 is inserted through the arc-shaped long hole 59 extending along the circumferential direction in the peripheral portion of the second downstream flange 56 and screwed into the screw hole 60 formed in the second upstream flange 54. It is. A plurality (four in this case) of the long holes 59 are formed at equal intervals in the circumferential direction. For this reason, the relative position in the circumferential direction of the second downstream flange 56 and the second upstream flange 54 can be changed. That is, the third outlet 58 of the third space 51 is configured to be movable and adjustable in the circumferential direction around the axis CL of the second space 31.

  The second space 31 is connected to and communicates with the first space 11 on the upstream side and the third space 51 on the downstream side. The flow of the fluid passing through the swirl flow adjusting device 100 according to the present embodiment is indicated by arrows in FIG. 2, and proceeds in the order of flows F1, F2, F3, F4, and F5.

FIG. 4 is a view for explaining the principle of adjusting the swirling flow by the swirling flow adjusting device 100.
The three circles in FIG. 4 flow out from the third outlet 58 through the first inlet 17 and the first outlet 18 of the first space 11 and the third inlet 57 and the third outlet 58 of the third space 51. It is projected onto a plane perpendicular to the direction of movement. The direction in which the fluid flows out from the third outlet 58 corresponds to the upward direction here. Therefore, the plane perpendicular to the direction in which the fluid flows out from the third outlet 58 corresponds to the horizontal plane here. In FIG. 4, the first outlet 18 and the third inlet 57 overlap.

  In FIG. 4, the symbol “17a” is the center of the first inlet 17, the symbol “18a” is the center of the first outlet 18, the symbol “57a” is the center of the third inlet 57, and the symbol “58a” is the center of the third outlet 58. Indicates the center. A vector obtained by projecting a vector from the center 17a of the first inlet 17 toward the center 18a of the first outlet 18 onto the horizontal plane is defined as a first projection vector V1. Here, the vector from the center 17a of the first inlet 17 toward the center 18a of the first outlet 18 corresponds to the flow F2 shown in FIG. A vector obtained by projecting a vector from the center 57a of the third inlet 57 toward the center 58a of the third outlet 58 onto the horizontal plane is defined as a second projection vector V2. Here, the vector from the center 57a of the third inlet 57 toward the center 58a of the third outlet 58 corresponds to the flow F4 shown in FIG.

  As shown in FIG. 4, the direction of the first projection vector V1 and the direction of the second projection vector V2 are different. Here, the rotation direction when the direction of the first projection vector V1 coincides with the direction of the second projection vector V2 is T2. In this case, as the fluid flows through the swirl flow adjusting device 100, a swirl flow that rotates in the direction of the rotation direction T2 is generated.

According to such a swirl flow adjusting device 100, for example, swirl flow can be adjusted without using a structure that requires an installation space such as a sufficiently long straight pipe. Further, since a member that obstructs the flow is not installed in the flow path, flow loss does not increase, and members installed in the flow path do not fall off due to corrosion or the like.
That is, according to the present embodiment, it is possible to provide the swirling flow adjusting device 100 that can adjust the swirling flow in the flow path with a compact configuration without particularly installing a member in the flow path.

  In the present embodiment, a swirl flow that is a flow swirling in the direction T1 shown in FIG. 4 is formed on the downstream side of the bent pipe 114 (see FIG. 1) in the upstream pipe 110. However, by adjusting the swirl flow by the swirl flow adjusting device 100, the swirl flow formed on the upstream side can be attenuated. Specifically, the rotational direction T2 corresponding to the direction of the swirling flow generated by the swirling flow adjusting device 100 is opposite to the direction T1 of the swirling flow of the fluid flowing into the first space 11. In this way, the swirling flow adjusting device 100 can attenuate the swirling flow generated in the upstream pipe 110.

  In the present embodiment, the orifice 121 is provided in the downstream pipe 120 that is a straight pipe. Since the swirling flow in the upstream pipe 110 is attenuated by the swirling flow adjusting device 100, the fluid in which the swirling flow is suppressed enters the orifice 121. Therefore, the flow rate can be measured more accurately by the flow rate measurement unit including the orifice 121.

  In the present embodiment, the first inlet 17 of the first space 11 and the third outlet 58 of the third space 51 are configured to be movable and adjustable in the circumferential direction around the axis CL of the second space 31. ing. Therefore, the rotation direction T2 and the rotation angle when the direction of the first projection vector V1 in FIG. 4 is matched with the direction of the second projection vector V2 can be adjusted. That is, the direction and strength of the swirling flow generated by the swirling flow adjusting device 100 can be adjusted. Thereby, the swirl flow can be adjusted more accurately according to the situation of the flow path of the upstream pipe 110 and the downstream pipe 120.

(Second Embodiment)
Next, with reference to FIG. 5, the second embodiment of the present invention will be described with a focus on differences from the first embodiment described above, and description of common points will be omitted. In the second embodiment, the same reference numerals are given to components common to the first embodiment described above.

FIG. 5 is an enlarged perspective view of a swirl flow adjusting device 100a according to the second embodiment of the present invention.
As shown in FIG. 5, the swirl flow adjusting device 100a includes a first space forming unit 10, a second space forming unit 30, and a third space forming unit 50a. In 2nd Embodiment, the 3rd space formation part 50a is different from the 3rd space formation part 50 in 1st Embodiment.

  A third space 51a serving as a flow path is formed inside the third space forming portion 50a. The third space forming portion 50a has a third cylindrical portion 52a having a cylindrical shape extending in a direction perpendicular to the direction in which the fluid flows out from the third outlet 58, that is, in the horizontal direction. The above-described third space 51a is formed inside the third cylindrical portion 52a. The third space 51a has a columnar shape extending in the horizontal direction. Here, the cross-sectional shape when the third space 51a is cut by a vertical plane is shown as a rectangle, but may be another shape such as a circle.

  Such a swirl flow adjusting device 100a according to the second embodiment has a simpler structure than that of the first embodiment, can reduce manufacturing costs, and can reduce the volume of the device.

  Note that the third space forming portion 50a around the axis CL (see FIG. 3) of the second space 31 is connected to the connecting portion between the second space 31 and the third space 51a formed inside the second space forming portion 30. A seal structure that can rotate is also applicable. If comprised in this way, the rotation direction T2 and rotation angle in the case of making the direction of the 1st projection vector V1 in FIG. 4 correspond with the direction of the 2nd projection vector V2 can be adjusted.

(Third embodiment)
Next, with reference to FIG. 6, the third embodiment of the present invention will be described with a focus on differences from the second embodiment described above, and description of common points will be omitted. In the third embodiment, components that are the same as those in the second embodiment are assigned the same reference numerals.

FIG. 6 is an enlarged perspective view of a swirl flow adjusting device 100b according to the third embodiment of the present invention.
As shown in FIG. 6, the swirl flow adjusting device 100b includes a first space forming part 10a, a second space forming part 30, and a third space forming part 50a. In the second embodiment, the first space forming portion 10a is different from the first space forming portion 10 in the second embodiment.

  A first space 11a serving as a flow path is formed inside the first space forming portion 10a. The first space forming portion 10a includes a first cylindrical portion 12a having a cylindrical shape extending in a direction perpendicular to the direction in which the fluid flows out from the third outlet 58, that is, in the horizontal direction. The first space 11a described above is formed inside the first cylinder portion 12a. The first space 11a has a columnar shape extending in the horizontal direction. Here, the cross-sectional shape when the first space 11a is cut by a vertical plane is shown as a rectangle, but may be another shape such as a circle.

  Such a swirl flow adjusting device 100b according to the third embodiment has a simpler structure than that of the second embodiment, can reduce manufacturing costs, and can further reduce the volume of the device.

  The first space forming portion 10a and the third space forming portion around the axis CL of the second space 31 are connected to the connecting portions of the first space 11a and the second space 31, and the second space 31 and the third space 51a. A seal structure that allows each of the 50a to rotate may be applied. If comprised in this way, the rotation direction T2 and rotation angle in the case of making the direction of the 1st projection vector V1 in FIG. 4 correspond with the direction of the 2nd projection vector V2 can be adjusted.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Further, a part of the configuration of an embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of an embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of the above-described embodiment.

  For example, in the above-described embodiment, the swirl flow adjusting devices 100, 100a, and 100b have been described as being used as devices that attenuate the swirl flow generated in the upstream pipe 110, but the present invention is not limited to this. Absent. The present invention can also be used as an apparatus for generating a swirl flow, for example, when the cleaning effect or heat transfer effect is improved by the swirl flow.

  In the above-described embodiment, the first inlet 17 and the third outlet 58 are configured to be movable and adjustable in the circumferential direction around the axis CL of the second space 31, but the present invention is limited to this. Is not to be done. One of the first inlet 17 and the third outlet 58 may be configured to be movable and adjustable in the circumferential direction around the axis CL of the second space 31. Even in this case, it is possible to adjust the rotation direction T2 and the rotation angle when the direction of the first projection vector V1 in FIG. 4 coincides with the direction of the second projection vector V2. Further, when the direction and strength of the swirling flow in the upstream pipe 110 are obtained in advance by design specifications, experiments, or the like, the first inlet 17 and the third outlet 58 are circles around the axis CL of the second space 31. The position in the circumferential direction may be fixed.

  In the above-described embodiment, the swirl flow adjusting device 100 includes the three spaces of the first space 11, the second space 31, and the third space 51 (see FIG. 2 and the like). It is not limited to. Another space is further provided on the upstream side of the first space 11 or the downstream side of the third space 51 to increase the swirling flow generated so as to rotate, for example, in the direction of the rotation direction T2 (see FIG. 4). Also good.

  Moreover, in above-described embodiment, although the 2nd cylindrical part 32 of the 2nd space formation part 30 has predetermined length (refer FIG. 2 etc.), this invention is not limited to this. . The second cylindrical portion 32 may be shorter or omitted. When the second cylindrical portion 32 is omitted, the second space 31 is a disk-shaped space formed inside the hole that connects the first space 11 and the third space 51.

11, 11a First space 17 First inlet 18 First outlet 31 Second space 33 Second inlet 34 Second outlet 51, 51a Third space 57 Third inlet 58 Third outlet 100, 100a, 100b Swirling flow adjusting device 110 Upstream pipe 112, 114 Curved pipe 120 Downstream pipe 121 Orifice CL Axis T1 Direction of swirl flow T2 Direction of rotation V1 First projection vector V2 Second projection vector

Claims (8)

A first space forming portion that forms a first space having a first inlet through which a fluid flows in and a first outlet through which the fluid flowing in from the first inlet flows out;
A second space forming part forming a second space having a second inlet connected to the first outlet and a second outlet from which a fluid flowing in from the second inlet flows out;
A third space forming part that forms a third space having a third inlet connected to the second outlet, and a third outlet through which a fluid flowing in from the third inlet flows out,
A vector obtained by projecting a vector from the first inlet to the first outlet onto a plane perpendicular to the direction in which fluid flows out from the third outlet is defined as a first projection vector, and the third inlet to the third outlet. A swirl flow adjusting device characterized in that, when a vector obtained by projecting a heading vector onto the plane is a second projection vector, the direction of the first projection vector is different from the direction of the second projection vector.   2. The swirl flow adjustment according to claim 1, wherein at least one of the first inlet and the third outlet is configured to be movable and adjustable in a circumferential direction around the axis of the second space. apparatus. The first inlet is connected to an upstream pipe disposed on the upstream side of the first space,
The swirl flow adjusting device according to claim 1, wherein the upstream pipe has a bent pipe having a curved axis. The third outlet is connected to a downstream pipe disposed on the downstream side of the third space,
The downstream pipe is a straight pipe having a straight axis,
The swirl flow adjusting device according to claim 1, wherein an orifice is provided in the straight pipe.   The rotation direction when the direction of the first projection vector coincides with the direction of the second projection vector is opposite to the direction of the swirling flow of the fluid flowing into the first space. The swirl | vortex flow adjustment apparatus of description. The first space, the second space, and the third space have a cylindrical shape having a common axis,
The second inlet and the second outlet are respectively formed at both ends in the axial direction of the second space,
The first inlet is formed at a position eccentric to the axis of the second space on the upstream end face of the first space,
2. The swirl flow adjusting device according to claim 1, wherein the third outlet is formed at a position eccentric to an axis of the second space on an end face on the downstream side of the third space. The first space and the second space have a cylindrical shape having a common axis,
The third space has a columnar shape extending in a direction perpendicular to a direction in which fluid flows out from the third outlet,
The second inlet and the second outlet are respectively formed at both ends in the axial direction of the second space,
The first inlet is formed at a position eccentric to the axis of the second space on the upstream end face of the first space,
2. The swirl flow adjusting device according to claim 1, wherein the third outlet is formed at a position eccentric to an axis of the second space on an end face on the downstream side of the third space. The second space has a cylindrical shape,
The first space and the third space each have a column shape extending in a direction perpendicular to a direction in which fluid flows out from the third outlet,
The second inlet and the second outlet are respectively formed at both ends in the axial direction of the second space,
The first inlet is formed at a position eccentric to the axis of the second space on the upstream end face of the first space,
2. The swirl flow adjusting device according to claim 1, wherein the third outlet is formed at a position eccentric to an axis of the second space on an end face on the downstream side of the third space.

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