JP2021112714A - Sand remover - Google Patents

Abstract

To provide a sand remover that is adaptable to variations in flow rate at low cost.SOLUTION: A sand remover 1 includes: a processing part 12 having at least an inner diameter on a lower end side gradually reducing toward a lower end and being open at the lower end, an inflow part 13 for making raw water flow along an inner peripheral surface of the processing part 12 inside the processing part 12; and a rising pipe part 51 which is formed in a cylindrical shape being open at both ends, one end being positioned coaxially with the processing part 12 inside the processing part 12 and the other end being fluidly continuous with a secondary side of the processing part 12, and the rising pipe part allowing change of at least one of the position of the one end and the inner diameter of the one end in the axial direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sand remover for removing sand from raw water.

A solid-liquid separation device that separates foreign substances from raw water is known (see, for example, Patent Document 1). Further, as a solid-liquid separation device, a sand removal device for removing sand from raw water such as well water containing sand is also known.

In the sand remover, for example, raw water flows in along the inner peripheral surface of a treatment tank whose inner surface is formed into a conical shape to form a swirling flow, and sand is separated from the raw water by using centrifugal force for treatment. The sand is discharged from the opening at the lower end of the tank, and the treated water from which the sand has been removed by the ascending flow generated in the center of the treatment tank is discharged to the outside of the treatment tank.

Japanese Unexamined Patent Publication No. 2011-83397

Such a sand removal device exhibits a separation ability in an appropriate flow rate range, and if it is operated outside the appropriate flow rate range, the specifications of the device may not be satisfied. Specifically, if the sand remover is operated at a flow rate smaller than the appropriate flow rate range, the separation capacity may decrease. Further, when the flow rate of the sand remover is larger than the appropriate flow rate range, the pressure loss increases remarkably in addition to the decrease in the separation capacity.

In particular, when the sand remover is used for well water, if the amount of pumped water fluctuates due to fluctuations in the water level of the well, the operation will be at a different flow rate from the initial installation, and there is a risk that the operation will be outside the appropriate flow rate range. There is.

For this reason, if the sand removal device is operated outside the proper flow rate range due to fluctuations in the water level of the well, it is necessary to replace it with another suitable model, and the cost of replacing the model is high. It was a big one. In addition, it is necessary to prepare a plurality of models of sand removal devices in advance, and the cost is high.

Therefore, an object of the present invention is to provide a sand removal device capable of adapting to fluctuations in flow rate at low cost.

According to one aspect of the present invention, in the sand removing device, at least the inner diameter on the lower end side gradually decreases toward the lower end, and the lower end opens, and the inner circumference of the processing portion inside the processing portion. An inflow part through which raw water flows along a surface and a cylindrical shape with both ends open are formed, one end is arranged coaxially with the processing part inside the processing part, and the other end is on the secondary side of the processing part. It is provided with a fluidly continuous riser pipe portion in which the position of the one end in the axial direction and at least one of the inner diameters of the one end can be changed.

According to the present invention, it is possible to provide a sand removal device capable of responding to fluctuations in flow rate at low cost.

The front view which shows the structure of the sand removal apparatus which concerns on 1st Embodiment of this invention. The top view which shows the structure of the sand removal device in a partial cross section. The cross-sectional view which shows the main part structure of the sand removal device. The cross-sectional view which shows the main part structure of the sand removal device. The cross-sectional view which shows the main part structure of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The cross-sectional view which shows the main part structure of one modification of the sand removal device. The top view which shows the main part structure of the sand removal device. The cross-sectional view which shows the main part structure of the sand removal apparatus which concerns on 2nd Embodiment of this invention. The cross-sectional view which shows the main part structure of one modification of the sand removal device.

(First Embodiment)
Hereinafter, the sand removal device 1 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5. FIG. 1 is a front view showing the configuration of the sand removal device 1, and FIG. 2 is a top view showing a partial cross section of the configuration of the sand removal device 1. FIG. 3 is a cross-sectional view showing a main configuration of the sand removal device 1, and a part of the configuration shown in FIGS. 1 and 2 is omitted.

As shown in FIGS. 1 and 2, the sand removal device 1 includes a base portion 11, a processing portion 12, an inflow portion 13, an outflow portion 14, and an accumulation portion 15. The sand removing device 1 causes raw water to flow from the inflow unit 13 into the processing unit 12, and the processing unit 12 performs a process of removing sand from the raw water containing sand, accumulates the sand in the accumulation unit 15, and collects the sand from the raw water. This is a device that discharges treated water from which sand has been removed from the outflow portion 14. The sand removal device 1 is used, for example, for well water use, and is installed in an installation portion near a well.

The base portion 11 is configured to be able to support the processing portion 12. The base portion 11 has, for example, a base portion 11a and a plurality of support portions 11b. The base portion 11a is formed, for example, in the shape of a rectangular plate. The base portion 11a is fixed to the installation portion, for example, by being partially buried in the ground. The support portion 11b is formed, for example, in a rod shape in which a part is curved, one end thereof is fixed to the base portion 11a, and the other end is fixed to the processing portion 12.

The processing unit 12 is extended along the direction of gravity, and the inner diameter is gradually reduced at least on the lower end side, and the processing unit 12 is formed in a shape in which the lower end is open. That is, the processing unit 12 forms a conical internal space whose inner diameter decreases from the upper end side to the lower end side at least on the lower end side, and the lower end is open. As shown in FIGS. 1 to 3, the processing unit 12 includes, for example, a part of the cylindrical portion 21, a conical portion 22, and a ceiling portion 23. In this embodiment, as described above, the vertical direction is defined as two directions along the direction of gravity.

The cylindrical portion 21 is formed in a tubular shape that extends in the vertical direction and has an upper end and a lower end open. The cylindrical portion 21 extends in the vertical direction in the axial direction. The internal space of the cylindrical portion 21 is partitioned in the vertical direction by, for example, the ceiling portion 23. Here, a part of the cylindrical portion 21 is a lower portion of the cylindrical portion 21 partitioned by the ceiling portion 23. The other portion of the cylindrical portion 21 is the upper portion of the cylindrical portion 21 partitioned by the ceiling portion 23. A part of the cylindrical portion 21 constitutes a part of the processing portion 12, and the other portion of the cylindrical portion 21 constitutes a part of the outflow portion 14.

The conical portion 22 is formed in a tubular shape that extends in the vertical direction and whose inner diameter gradually decreases from the upper end to the lower end. The conical portion 22 is formed in a conical cylinder shape having a constant thickness, for example, in which the inner and outer diameters are gradually reduced from the upper end to the lower end. The conical portion 22 extends along the vertical direction in the axial direction. The upper end of the conical portion 22 is connected to the lower end of the cylindrical portion 21 by, for example, bolts and nuts. In addition, in the figure below FIG. 3, the description of the bolt and the nut connecting the cylindrical portion 21 and the conical portion 22 is omitted. The upper end of the conical portion 22 has an inner diameter equivalent to the inner diameter of the cylindrical portion 21. The lower end of the conical portion 22 opens with a predetermined diameter.

As shown in FIG. 3, the ceiling portion 23 has an opening portion 41 and a fixing portion 42. The ceiling portion 23 is configured so that a part of the cylindrical portion 21 can be closed in the axial direction. The ceiling portion 23 is, for example, a partition plate provided inside the cylindrical portion 21. The ceiling portion 23 is formed, for example, in a disk shape continuous with the inner peripheral surface of the cylindrical portion 21. The ceiling portion 23 is integrally formed on the inner peripheral surface of the cylindrical portion 21, for example.

The opening 41 is, for example, a circular opening that is continuous from one surface of the ceiling portion 23 on the conical portion 22 side to the other surface. The opening 41 is provided in the center of the ceiling portion 23.

The fixing portion 42 detachably fixes the rising pipe portion 51 of the outflow portion 14, which will be described later, to the ceiling portion 23. The fixing portion 42 includes, for example, a first fastening member 43 and a second fastening member 44.

The first fastening member 43 is, for example, a bolt provided on the peripheral edge of the opening 41. A plurality of first fastening members 43 are provided, for example, along the peripheral edge of the opening 41. The first fastening member 43 is formed on, for example, the upper surface of the ceiling portion 23, and extends upward in a direction orthogonal to the ceiling portion 23. The first fastening member 43 is integrally formed with the ceiling portion 23 by welding or the like.

The second fastening member 44 is a member that fastens to the first fastening member 43. The second fastening member 44 is, for example, a nut screwed into the first fastening member 43. The second fastening member 44 is provided in the same number as the first fastening member 43, and is attached to each first fastening member 43 via a fixed portion 61 of the riser pipe portion 51, which will be described later.

The inflow unit 13 communicates with the inside and outside of the treatment unit 12 so that raw water can flow into the treatment unit 12. The inflow portion 13 is, for example, a pipe that is integrally provided below the cylindrical portion 21 and communicates with the inside and outside of the cylindrical portion 21. The inflow portion 13 is provided below the ceiling portion 23. Further, the inflow unit 13 is configured so that raw water can flow in along the inner peripheral surface of the treatment unit 12. Here, the inflow of raw water along the inner peripheral surface of the processing unit 12 means that the raw water flows into the inner peripheral surface side of the processing unit 12 instead of the central side of the processing unit 12. The inflow portion 13 is provided, for example, outward in the radial direction from the center of the processing portion 12, and is provided at a position where the axis does not intersect the axis of the cylindrical portion 21. Further, the inflow portion 13 is provided, for example, in a posture in which the axial direction is orthogonal to the axial direction of the cylindrical portion 21.

The outflow unit 14 communicates with the inside and outside of the processing unit 12 so that the treated water can be discharged to the outside of the processing unit 12. The outflow portion 14 includes, for example, an ascending pipe portion 51, a seal portion 52, a lid portion 53, another portion of the cylindrical portion 21, and an outflow pipe portion 54.

The riser pipe portion 51 constitutes a part of the flow path that guides the treated water to the secondary side of the treatment unit 12. Specifically, the riser pipe portion 51 constitutes a flow path of the treated water flowing from the lower side to the upper side of the treated portion 12 along the axes of the cylindrical portion 21 and the conical portion 22. The riser pipe portion 51 has a fixed portion 61 fixed to the fixed portion 42 of the ceiling portion 23. The riser pipe portion 51 is arranged coaxially with the cylindrical portion 21 and the conical portion 22 of the processing portion 12 in the opening 41 of the ceiling portion 23. The riser pipe portion 51 is formed in a cylindrical shape, for example, extending in one direction and opening at both ends. The riser pipe portion 51 is fixed to the ceiling portion 23 by the first fastening member 43 and the second fastening member 44 via the fixed portion 61, for example, in a posture in which the axis line is along the vertical direction.

Further, for example, the lower end of the riser pipe portion 51 is located inside the processing unit 12, and the upper end is located outside the processing unit 12. In the present embodiment, the lower end of the rising pipe portion 51 is located inside the conical portion 22, and the upper end is located inside the cylindrical portion 21 and above the ceiling portion 23. As shown in FIG. 3, in the rising pipe portion 51 fixed to the ceiling portion 23, the distance from the lower surface of the ceiling portion 23 to one end that opens inside the conical portion 22 is L, and the portion opens inside the conical portion 22. Let D be the inner diameter of one end.

The fixed portion 61 is, for example, a fastened portion that is detachably fastened to the ceiling portion 23 by the first fastening member 43 and the second fastening member 44. As a specific example, the fixed portion 61 is a flange portion provided on the upper end side of the riser pipe portion 51 and including a plurality of holes through which the first fastening member 43 can be inserted. The fixed portion 61 is arranged, for example, in a state where the first fastening member 43 is inserted into a plurality of holes, and the second fastening member 44 is screwed into the first fastening member 43 with respect to the ceiling portion 23. To be concluded.

The sealing portion 52 is provided between the opening 41 of the ceiling portion 23 and the fixed portion 61 of the rising pipe portion 51, and watertightly seals between the ceiling portion 23 and the rising pipe portion 51. The seal portion 52 is, for example, a gasket formed of a resin material. The shape of the seal portion 52 is appropriately set according to the shape of the gap formed between the opening 41 and the riser pipe portion 51.

The lid portion 53 is configured so that the upper portion of the cylindrical portion 21 can be closed. The lid portion 53 is connected to the upper end of the cylindrical portion 21 by, for example, bolts and nuts. Further, the lid portion 53 is provided with, for example, an air valve 53a.

The other portion of the cylindrical portion 21 constitutes a part of the flow path on the secondary side of the riser pipe portion 51. Specifically, in the other portion of the cylindrical portion 21, the upper internal space partitioned by the ceiling portion 23 is covered with the lid portion 53, so that the upper end of the rising pipe portion 51 and the outflow pipe portion 54 are continuous. Make up the road.

The outflow pipe portion 54 constitutes a discharge port for discharging treated water to the secondary side. The outflow pipe portion 54 is, for example, a pipe that is integrally provided in another portion of the cylindrical portion 21 and communicates with the inside and outside of the cylindrical portion 21. The outflow pipe portion 54 is provided above the ceiling portion 23. The outflow pipe portion 54 is provided, for example, in a posture in which the axis is orthogonal to the axis of the cylindrical portion 21.

As shown in FIG. 1, the accumulating portion 15 is connected to the lower end of the conical portion 22 and is fluidly continuous with the inside of the conical portion 22. The accumulating portion 15 is connected to the lower end of the conical portion 22 by, for example, bolts and nuts. The accumulation unit 15 has an accumulation chamber 71, a discharge pipe 72, and an on-off valve 73. The accumulation chamber 71 is configured so that the sand flowing in from the conical portion 22 can be deposited inside. The discharge pipe 72 is fluidly connected to the accumulation chamber 71, and is configured to be able to discharge the sand accumulated in the accumulation chamber 71 to the outside. The on-off valve 73 opens and closes the flow path of the discharge pipe 72.

In such a sand removing device 1, another rising pipe portion 51 having a different axial length and an inner diameter of the opening end can be attached to the ceiling portion 23. Hereinafter, using FIGS. 4 and 5, a sand removing device 1 to which an ascending pipe portion 51 having a different axial length is attached, and an ascending pipe portion 51 having a different inner diameter of an opening end opened in the conical portion 22 are provided. An example of the attached sand removing device 1 will be described.

FIG. 4 is a diagram showing a main part configuration of the sand removing device 1 in which a rising pipe portion 51A having a different axial length from the rising pipe portion 51 is provided. FIG. 5 is a diagram showing a state in which a rising pipe portion 51B having a different inner diameter is provided with respect to the rising pipe portion 51, which is a main configuration of the sand removing device 1. Note that, in FIGS. 4 and 5, as in FIG. 3, the description of a partial configuration of the sand removal device 1 is omitted.

As shown in FIG. 4, the rising pipe portion 51A is different in that, for example, the axial distance from the lower end to the fixed portion 61 is larger than that of the rising pipe portion 51, and the other configurations are raised. It is configured in the same manner as the pipe portion 51. When the fixed portion 61 is fixed to the ceiling portion 23, such an ascending pipe portion 51A sets the distance LA from the lower surface of the ceiling portion 23 to the lower end that opens inside the conical portion 22 in the ascending pipe portion 51. The distance from the lower surface of the ceiling portion 23 to the lower end that opens inside the conical portion 22 can be made larger than the distance L.

As shown in FIG. 5, the rising pipe portion 51B is different in that it has a structure having an inner diameter smaller than that of the rising pipe portion 51, for example, and the other configurations are the same as those of the rising pipe portion 51. Further, at this time, as the seal portion 52, a seal portion 52 formed so as to be watertightly sealable between the ceiling portion 23 and the riser pipe portion 51B is used. When the ascending pipe portion 51B is fixed to the ceiling portion 23, the inner diameter DB of one end that opens inside the conical portion 22 is smaller than the inner diameter D of one end that opens inside the conical portion 22 in the ascending pipe portion 51. can do.

In such a sand removing device 1, in a state where the lid portion 53 is removed from the cylindrical portion 21, the rising pipe portion 51 is attached to the ceiling portion 23 by fastening and releasing the first fastening member 43 and the second fastening member 44. Can be attached and detached. Further, in the sand removing device 1, the other rising pipe portions 51A and 51B are attached and detached by the same work as the work of attaching and detaching the rising pipe portion 51.

The flow of removing sand from raw water by such a sand removing device 1 will be described with reference to FIG. As shown by the broken line arrow in FIG. 1, the sand removing device 1 generates a swirling flow along the inner peripheral surfaces of the cylindrical portion 21 and the conical portion 22 when the raw water containing sand flows into the cylindrical portion 21 from the inflow portion 13. .. When a swirling flow is generated, the sand having a large specific gravity with respect to water moves to the inner wall side of the conical portion 22 due to the centrifugal force. The sand that has moved to the inner wall side of the conical portion 22 gradually reaches the lower end of the conical portion 22 and moves to the accumulating portion 15 to be separated from the raw water.

As the flow of the treated water in which the sand is separated from the raw water, an upward flow along the axis of the conical portion 22 is generated. The treated water passes through the riser pipe portion 51 and flows into the upper part of the cylindrical portion 21 partitioned by the ceiling portion 23. The treated water flowing above the cylindrical portion 21 is discharged from the outflow pipe portion 54.

In such a sand removal device 1, the sand removal rate varies depending on the flow rate of the raw water flowing in from the inflow section 13 and the vertical position and diameter of the opening end of the riser pipe section 51 in the processing section 12. The sand removal rate indicates the ratio of the weight of the sand recovered from the accumulation unit 15 to the weight of the sand contained in the raw water that has flowed into the treatment unit 12 via the inflow unit 13.

Specifically, the sand removing device 1 has the same flow rate of raw water and the vertical position of the opening end of the rising pipe portion 51 in the processing unit 12, and the opening end of the rising pipe portion 51 in the processing unit 12 is the same. Comparing the cases where the inner diameters are different, the sand removal rates are different. Further, the sand removing device 1 has the same flow rate of raw water and the inner diameter of the opening end of the rising pipe portion 51 inside the conical portion 22, and the positions of the opening end of the rising pipe portion 51 in the processing unit 12 in the vertical direction are different. The sand removal rate is different even when comparing the cases where the sand is removed. That is, from the viewpoint of increasing the sand removal rate, the sand removing device 1 has a range suitable as a combination of the position and the diameter of the opening end of the rising pipe portion 51 in the processing portion 12 according to the flow rate of the raw water flowing in from the inflow portion 13. Is what exists.

In the sand removing device 1, the smaller the inner diameter of the opening end of the rising pipe portion 51 in the processing portion 12, the higher the pressure loss. Therefore, it is preferable that the sand removing device 1 determines the axial length of the rising pipe portion 51 and the inner diameter of the opening end in consideration of the balance between the sand removing rate and the pressure loss.

On the other hand, according to the sand removing device 1 according to the first embodiment described above, since the rising pipe portion 51 is detachably configured with respect to the ceiling portion 23, the length in the axial direction is different. It is possible to replace it with another rising pipe portion 51A having a different vertical position of the opening end or a rising pipe portion 51B having a different inner diameter of the opening end. As a result, when the flow rate of the raw water flowing into the inflow section 13 fluctuates, the sand removal device 1 can adapt to the fluctuation of the flow rate by a simple operation of replacing the riser pipe section 51.

Therefore, according to the sand removal device 1, it is not necessary to prepare another sand removal device of a different model and install it in place of the sand removal device in use in order to adapt to the fluctuation of the flow rate. Therefore, according to the sand removal device 1, it is possible to reduce the work for adapting to the fluctuation of the flow rate and the cost related to the manufacture and installation of a plurality of types of sand removal devices.

Further, according to the sand removing device 1, the number of parts to be replaced in order to adapt to the fluctuation of the flow rate can be reduced. For example, when the ascending pipe portion 51 is replaced with the ascending pipe portion 51A or the ascending pipe portion 51B, the same parts can be used as the sand removing device 1 except for the ascending pipe portion 51. Therefore, the sand removal device 1 can reduce the cost related to the replacement parts for adapting to the fluctuation of the flow rate.

Further, the replacement work of the rising pipe portion 51 in the sand removing device 1 is a simple operation of releasing the fastening of the fixed portion 61 by the first fastening member 43 and the second fastening member 44 and replacing the rising pipe portion 51A and 51B with other rising pipe portions 51A and 51B. It is work. In addition, the sand removing device 1 can perform the work by removing the lid portion 53, for example, the work of disconnecting the cylindrical portion 21 and the conical portion 22, and the inflow portion 13 and the outflow pipe portion 54. There is no need to remove the piping that is further connected to. That is, the sand removing device 1 has high workability for replacing the rising pipe portion 51.

Further, in the sand removing device 1, for example, when the rising pipe portion 51 is worn due to use, only the rising pipe portion 51 can be replaced, so that the cost related to the replacement part can be reduced.

As described above, according to the sand removal device 1 according to the embodiment of the present invention, it is possible to adapt to the fluctuation of the flow rate at low cost.

In the above-mentioned example, in the sand removal device 1, the outflow portion 14 includes an ascending pipe portion 51, a seal portion 52, a lid portion 53, another portion of the cylindrical portion 21, and an outflow pipe portion 54. An example has been described, but the present invention is not limited to this. For example, as shown in FIG. 6, the outflow portion 14 may further include a guide pipe portion 55 that connects the ascending pipe portion 51 and the outflow pipe portion 54.

The guide pipe portion 55 is provided in the cylindrical portion 21 and constitutes a flow path for the treated water flowing from the upper end of the rising pipe portion 51 to the outflow pipe portion 54. As shown in FIG. 6, the guide pipe portion 55 is formed, for example, in a cylindrical shape in which the middle portion is bent. The guide tube portion 55 is formed, for example, so that the axial center on one end side is along the gravity direction, that is, the vertical direction, and the axial center on the other end side is along the horizontal direction. One end of the guide pipe portion 55 is connected to the upper end of the rising pipe portion 51, and the other end is connected to the outflow pipe portion 54. The guide pipe portion 55 has, for example, a second flange portion 55a that faces the fixed portion 61 of the rising pipe portion 51 and includes a plurality of holes through which the first fastening member 43 can be inserted.

In such a guide pipe portion 55, the second flange portion 55a is arranged on the first fastening member 43 together with the fixed portion 61 of the rising pipe portion 51, and the second fastening member 44 screwed into the first fastening member 43 is mounted. Therefore, it is fixed to the ceiling portion 23 together with the rising pipe portion 51.

Such a guide pipe portion 55 can guide the treated water flowing out from the rising pipe portion 51 to the outflow pipe portion 54. As a specific example, the guide pipe portion 55 can change the flow direction of the treated water flowing out from the rising pipe portion 51 to the same horizontal direction as the axial direction of the outflow pipe portion 54. According to the sand removing device 1 provided with the guide pipe portion 55, it is possible to reduce the pressure loss when the treated water flows from the upper end of the rising pipe portion 51 to the outflow pipe portion 54.

The shape of the guide pipe portion 55 is appropriately set according to the discharge direction of the treated water by the outflow pipe portion 54. For example, when the discharge port of the outflow pipe portion 54 has a shape that is inclined with respect to the direction of gravity, the guide pipe portion 55 may have a shape in which the axial center on the other end side extends in a direction that is inclined with respect to the direction of gravity. good.

Further, in the above-described example, as an example of the configuration in which the position of the opening end of the riser pipe portion 51 in the processing unit 12 is different in the axial direction in the sand removal device 1, the length in the axial direction is different from that of the riser pipe portion 51. An example of exchanging with a different riser pipe portion 51A has been described, but the present invention is not limited to this. The configuration of the sand removing device 1 can be appropriately set as long as the axial position of the opening end of the rising pipe portion 51 in the processing unit 12 can be changed. Hereinafter, a modified example of the sand removing device 1 in which the position of the opening end of the rising pipe portion 51 in the processing portion 12 in the axial direction is different will be described with reference to FIGS. 7 to 9.

First, the sand removal device 1C, which is a modification of the sand removal device 1, will be described with reference to FIGS. 7 and 8. 7 and 8 are cross-sectional views showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51 as the main configuration of the sand removing device 1C.

As shown in FIG. 7, the sand removing device 1C includes a fixing portion 42C having a configuration different from that of the fixing portion 42. The fixing portion 42C is provided between the plurality of first fastening members 43C provided on the ceiling portion 23, the plurality of second fastening members 44C screwed into the first fastening member 43C, and the fixed portion 61 and the ceiling portion 23. The spacer portion 81 is provided. In the sand removing device 1C, the position of the rising pipe portion 51 in the vertical direction is variable by the spacer portion 81. The other configurations of the sand removal device 1C are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1 in FIG. 7, and detailed description thereof will be omitted.

The first fastening member 43C is, for example, a bolt provided on the peripheral edge of the opening 41. The first fastening member 43C is configured to have a length capable of screwing the second fastening member 44C with the spacer portion 81 provided between the ceiling portion 23 and the fixed portion 61.

The second fastening member 44C is, for example, a nut screwed into the first fastening member 43C. The second fastening member 44C is provided in the same number as the first fastening member 43C, and is attached to each first fastening member 43 with the fixed portion 61 and the spacer portion 81 of the rising pipe portion 51 interposed therebetween.

The spacer portion 81 is formed, for example, in an annular shape whose inner peripheral surface is along the outer peripheral surface of the rising pipe portion 51. The spacer portion 81 has a predetermined thickness T in the axial direction. The thickness T of the spacer portion 81 is appropriately set according to the desired amount of change in the position of the opening end of the riser pipe portion 51. As a specific example, a plurality of spacer portions 81 having different thicknesses are prepared in advance, and those having a desired thickness are used. As another example, the spacer portion 81 may be set to a desired thickness by laminating a plurality of spacers.

Such a sand removing device 1C has a simple structure in which the spacer portion 81 is provided, and the position of the open end of the rising pipe portion 51 in the conical portion 22 can be changed. Specifically, as shown in FIG. 7, the distance from the ceiling portion 23 to the opening end of the rising pipe portion 51 in the sand removal device 1C can be reduced to LC = LT.

That is, the sand removing device 1C does not use a plurality of types of ascending pipe portions 51 having different lengths, but instead uses a kind of ascending pipe portion 51 and a spacer portion 81 to provide the shaft of the open end of the ascending pipe portion 51 in the processing unit 12. The position of the direction can be changed. According to such a sand removing device 1C, it is possible to reduce the cost of manufacturing a plurality of types of rising pipe portions 51 having different axial lengths. The sand removing device 1C may be used without providing the spacer portion 81.

Next, the sand removal device 1D, which is a modification of the sand removal device 1, will be described with reference to FIG. FIG. 8 is a cross-sectional view showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51 as the main configuration of the sand removal device 1D.

As shown in FIG. 8, the sand removing device 1D includes a new rising pipe portion 51D configured by providing an attachment portion 82 on the rising pipe portion 51. The ascending pipe portion 51D includes, that is, a pipe main body 51 having the same configuration as the ascending pipe portion 51, and an attach portion 82 provided at the lower end of the pipe main body 51. The other configurations of the sand removal device 1D are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1 in FIG. 8, and detailed description thereof will be omitted.

The attach portion 82 is attached to an open end located in the conical portion 22 of the pipe body 51, and forms a part of the flow path of the treated water flowing from the lower side to the upper side together with the pipe body 51. For example, the attach portion 82 is formed in a cylindrical shape in which one end is fitted to an open end located in the conical portion 22 of the pipe body 51 and the other end is open in the conical portion 22. Specifically, the attach portion 82 has an inner diameter of a portion fitted to the pipe main body 51 equal to the outer diameter of the pipe main body 51, and an inner diameter of the other portion having an inner diameter equivalent to the inner diameter of the pipe main body 51. The attach portion 82 includes, for example, a seal portion that watertightly seals between the pipe body 51 and the attachment portion 82.

Such a sand removal device 1D has a simple configuration in which the attach portion 82 is attached to the open end of the pipe body 51, and as shown in FIG. 8, the distance from the lower surface of the ceiling portion 23 to the entrance to the outflow portion 14 is set. The distance LD from the lower surface of the ceiling portion 23 to the lower end of the attach portion 82 can be extended. That is, the sand removing device 1D changes the position of the open end of the rising pipe portion 51 in the conical portion 22 to the lower end position of the attach portion 82 attached to the pipe main body 51 by attaching the attach portion 82 to the pipe main body 51. be able to. According to such a sand removing device 1D, it is possible to reduce the cost of manufacturing a plurality of types of rising pipe portions 51 having different axial lengths.

As the attach portion 82 used in the sand removal device 1D, a plurality of individuals having different lengths in the axial direction are prepared, and the attachment portion 82 is selectively used from the plurality of individuals according to the position of the opening end of the desired riser pipe portion 51D. It may be configured to be.

Next, the sand removal device 1E, which is a modification of the sand removal device 1, will be described with reference to FIG. FIG. 9 is a cross-sectional view showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51E as the main configuration of the sand removal device 1E.

As shown in FIG. 9, the sand removing device 1E includes a rising pipe portion 51E having a variable overall length in the axial direction instead of the rising pipe portion 51. The other configurations of the sand removal device 1E are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1 in FIG. 9, and detailed description thereof will be omitted.

The ascending pipe portion 51E has a plurality of pipes, and the plurality of pipes are connected so as to be relatively movable along the axial direction. The riser pipe portion 51E constitutes a flow path inside by these a plurality of pipes. As shown in FIG. 9, the rising pipe portion 51E includes, for example, an outer pipe portion 83, an inner pipe portion 84, and a second seal portion 85.

The outer pipe portion 83 is arranged coaxially with the cylindrical portion 21 and the conical portion 22 of the processing portion 12 in the opening 41 of the ceiling portion 23. The upper end of the outer pipe portion 83 is located above the ceiling portion 23, and the lower end is located below the ceiling portion 23. The outer pipe portion 83 is formed in a cylindrical shape having an inner diameter larger than that of the upper end to the middle portion, for example, from the lower end to the middle portion. Like the rising pipe portion 51, the outer pipe portion 83 has a fixed portion 61 on the upper end side and is detachably fixed to the ceiling portion 23, for example.

A part of the inner pipe portion 84 is arranged inside the outer pipe portion 83, and the other portion is outside the outer pipe portion 83 and is arranged below the outer pipe portion 83. The inner pipe portion 84 is formed in a cylindrical shape having an outer diameter equal to or less than the inner diameter of the middle portion from the upper end of the outer pipe portion 83. The lower end of the inner pipe portion 84 is arranged below the lower end of the outer pipe portion 83 in the axial direction.

The second seal portion 85 is provided between the outer pipe portion 83 and the inner pipe portion 84. The second seal portion 85 is provided, for example, in a part between the lower end and the middle portion of the outer pipe portion 83 in the axial direction. The second seal portion 85 can watertightly seal the gap formed between the inner peripheral surface of the outer pipe portion 83 and the outer peripheral surface of the inner pipe portion 84, and can hold the inner pipe portion 84 when the treated water flows. It is formed in an annular shape that produces frictional force.

In such a sand removing device 1E, the inner pipe portion 84 is arranged at an arbitrary position in the axial direction with respect to the outer pipe portion 83 in the rising pipe portion 51E. Further, the second seal portion 85 regulates the axial movement of the inner pipe portion 84 with respect to the outer pipe portion 83 due to the flow of treated water. That is, the sand removing device 1E can arbitrarily change the axial position of the opening end of the inner pipe portion 84 that opens inside the conical portion 22 in the rising pipe portion 51E.

In the above-mentioned example, the example in which the rising pipe portion 51E includes the outer pipe portion 83, the inner pipe portion 84, and the second seal portion 85 has been described, but the present invention is not limited to this. The riser pipe portion 51E may have a configuration having a plurality of pipes that are connected in the axial direction and are configured to be relatively movable in the axial direction. For example, the riser pipe portion 51E is connected to the inner pipe portion 84 and is connected to the inner pipe portion. It may be configured to further include another tube configured to be movable in the axial direction relative to 84.

Such a sand removing device 1E changes the distance from the lower surface of the ceiling portion 23 to the lower end of the rising pipe portion 51E by a simple operation of changing the axial position of the inner pipe portion 84 with respect to the outer pipe portion 83. Can be done. According to such a sand removing device 1E, it is possible to reduce the cost of manufacturing a plurality of types of rising pipe portions 51 having different axial lengths.

Further, in the above-described example, in the sand removing device 1, as an example of a configuration in which the inner diameter of the opening end of the rising pipe portion 51 in the processing unit 12 is different, the sand removing device 1 is replaced with a rising pipe portion 51B having an inner diameter different from that of the rising pipe portion 51. The example is described, but the present invention is not limited to this. The configuration of the sand removing device 1 can be appropriately set as long as the inner diameter of the opening end of the rising pipe portion 51 in the processing portion 12 can be made different. Hereinafter, a modified example of the sand removing device 1 in which the inner diameter of the opening end of the rising pipe portion 51 in the processing portion 12 is different will be described with reference to FIGS. 10 and 11.

First, the sand removal device 1F, which is a modification of the sand removal device 1, will be described with reference to FIG. FIG. 10 is a cross-sectional view showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51 as the main configuration of the sand removal device 1F.

As shown in FIG. 10, the sand removing device 1F includes a new rising pipe portion 51F configured by providing an attachment portion 82F on the rising pipe portion 51. The rising pipe portion 51F includes a pipe main body 51 having the same configuration as the rising pipe portion 51, and an attachment portion 82F provided at the lower end of the pipe main body 51. The other configurations of the sand removal device 1F are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1 in FIG. 10, and detailed description thereof will be omitted.

The attach portion 82F is attached to an open end located in the processing portion 12 of the pipe body 51. The attach portion 82F is configured to be fitable to, for example, an open end located in the processing portion 12 of the pipe body 51. The attachment portion 82F has a cylindrical shape in which one end is fitted to an opening end located in the processing portion 12 of the pipe body 51 and the other end is opened in the processing portion 12. The attach portion 82F includes, for example, a seal portion that watertightly seals between the pipe body 51 and the attachment portion 82F.

Further, the attach portion 82F has a tapered portion 82F whose inner diameter is gradually reduced from one end fitted to the pipe body 51 to the other end opened in the processing portion 12. That is, the attachment portion 82F has an inner diameter equivalent to the inner diameter D of the opening end located in the processing portion 12 of the pipe main body 51 at one end fitted to the pipe main body 51, and opens into the processing portion 12. The end has an inner diameter DF smaller than the inner diameter of the open end located in the processing portion 12 of the pipe body 51.

Such a sand removing device 1F has a simple configuration in which the attach portion 82F is attached to the open end of the pipe body 51, and the inner diameter of the open end in the conical portion 22 as the processing portion 12 is set to the processing portion 12 of the rising pipe portion 51. It can be changed to an inner diameter DF smaller than the inner diameter D of the opening end located inside. According to such a sand removing device 1F, it is possible to reduce the cost of manufacturing a plurality of types of rising pipe portions 51 having different diameters.

As the attach portion 82F used in the sand removing device 1F, a plurality of individuals having different inner diameters of the opening ends opened in the processing portion 12 are prepared, and a plurality of individuals having different inner diameters of the opening ends of the desired rising pipe portion 51F are prepared. It may be a configuration that is selectively used from an individual.

Further, as the attach portion 82F, a plurality of individuals having different axial lengths are prepared, and the individuals are appropriately selected according to the axial position of the opening end of the attach portion 82F in the desired processing unit 12. It may be attached to the tube body 51. As a result, the sand removing device 1F can change the inner diameter of the opening end in the conical portion 22 and change the distance from the lower surface of the ceiling portion 23 to the opening end in the conical portion 22 as the processing unit 12. can.

Further, in the above-described example, an example in which the attach portion 82F has a tapered portion 82F has been described, but the present invention is not limited to this, and the shape thereof is detachably fixed to the lower end of the pipe body 51 and the lower end is a conical portion. Any shape can be appropriately set as long as it has a shape that opens in 22 with an inner diameter smaller than the inner diameter of the opening end of the pipe body 51.

The attach portion 82F may have a shape having different inner diameters at the upper end and the lower end, for example. For example, as shown in FIG. 11, the attach portion 82F is provided at the upper end and has an inner diameter of fitting to the pipe body 51, and is provided at the lower end and has an inner diameter smaller than that of the first opening 82Fb. It may be configured to have a second opening 82Fc continuous with the first opening 82Fb. With such an attach portion 82F, the inner diameter of the opening end in the processing portion 12 can be changed to an inner diameter DF smaller than the inner diameter D of the opening end located in the conical portion 22 of the rising pipe portion 51.

Further, in the above-described example, as the fixing portion 42 of the sand removing device 1, the fixed portion 61 of the rising pipe portion 51 is fixed to the ceiling portion 23 by fastening the second fastening member 44 to the first fastening member 43. As described above, the fixing portion 42 can be appropriately set as long as the ceiling portion 23 and the rising pipe portion 51 are fixed to each other. Hereinafter, another example of the configuration of the fixing portion 42 will be described with reference to FIGS. 12 to 14.

First, the sand removal device 1G, which is a modification of the sand removal device 1, will be described with reference to FIG. FIG. 12 is a cross-sectional view showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51 as the main configuration of the sand removal device 1G.

As shown in FIG. 12, the sand removing device 1G includes a fixed portion 42G having a configuration different from that of the fixed portion 42, and a fixed portion 61G having a configuration different from that of the fixed portion 61. The other configurations of the sand removal device 1G are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1G in FIG. 12, and detailed description thereof will be omitted.

The fixing portion 42G includes a first fastening member 43G and a sealing portion 43Ga. The first fastening member 43G is, for example, a female screw provided along the inner peripheral surface of the opening 41 of the ceiling portion 23. The first fastening member 43G is provided on the inner peripheral surface of the opening 41 of the ceiling portion 23, for example, and is formed in a rectangular annular shape having a long cross-sectional shape in the axial direction. The first fastening member 43G has, for example, a female screw formed on the inner peripheral surface. The seal portion 43Ga is provided on the upper end side of the first fastening member 43G, for example, and watertightly seals between the riser pipe portion 51 and the fixed portion 61G.

The fixed portion 61G includes a second fastening member 44G and a contact portion 44Ga. The second fastening member 44G is, for example, a male screw screwed into the first fastening member 43G. The second fastening member 44G is provided on the outer peripheral surface of the rising pipe portion 51 on the upper end side, and is formed in an annular shape having an outer diameter substantially the same as the inner diameter of the first fastening member 43G. The second fastening member 44G has a male screw formed on the outer peripheral surface thereof to be screwed into the first fastening member 43G. The contact portion 44Ga is formed in an annular shape that abuts on the upper end surface of the first fastening member 43G and the seal portion 43Ga when screwed into the first fastening member 43G.

In such a sand removing device 1G, the rising pipe portion 51 is detachably fixed to the ceiling portion 23 by screwing the second fastening member 44G to the first fastening member 43G. Here, the sand removing device 1G has the second fastening member 44G with respect to the first fastening member 43G until the contact portion 44Ga of the second fastening member 44G of the rising pipe portion 51 comes into contact with the upper surface of the first fastening member 43G. Is used in a screwed state.

As shown in FIG. 12, in the sand removing device 1G, the rising pipe portion 51 is provided with the second fastening member 44G in order to facilitate the passage through the inside of the first fastening member 43G provided on the ceiling portion 23. The shape may be such that a tapered portion whose outer diameter gradually decreases from the portion to the lower side is formed. In this modified example, the riser pipe portion 51 is formed to have a constant thickness by gradually reducing both the inner diameter and the outer diameter from the portion where the second fastening member 44G is provided to the lower side.

Next, the sand removal device 1H, which is a modification of the sand removal device 1, will be described with reference to FIG. FIG. 13 is a cross-sectional view showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51 as the main configuration of the sand removing device 1H.

As shown in FIG. 13, the sand removing device 1H includes a fixing portion 42H having a configuration different from that of the fixing portion 42, and a fixed portion 61H having a configuration different from that of the fixed portion 61. The other configurations of the sand removal device 1H are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1 in FIG. 13, and detailed description thereof will be omitted.

The fixing portion 42H is a locking portion 91 provided on the ceiling portion 23. The locking portion 91 includes a base portion 93 provided on the ceiling portion 23 and a locking member 94. The locking portion 91 is configured so that the fixed portion 61H can be locked.

The base portion 93 is provided on the upper surface of the ceiling portion 23 along the peripheral edge of the opening 41, and is formed in an annular shape protruding upward. The base portion 93 has a plurality of hole portions 93a that penetrate from the outer peripheral surface to the inner peripheral surface and are formed so that the locking member 94 can be inserted. The plurality of hole portions 93a are arranged along the circumferential direction of the outer peripheral surface of the base portion 93. Further, the base portion 93 includes an annular sealing portion 93b that watertightly seals between the base portion 93 and the ceiling portion 23.

The fixed portion 61H is a locked portion 92 provided on the upper end side of the rising pipe portion 51. The locked portion 92 is, for example, a recess provided on the outer peripheral surface of the rising pipe portion 51 and in which a part of the locking member 94 can be arranged. A plurality of locked portions 92 are provided along the circumferential direction of the outer peripheral surface of the rising pipe portion 51. For example, the locked portions 92 are provided at least at two locations 180 degrees apart along the circumferential direction of the outer peripheral surface of the rising pipe portion 51. Further, a plurality of locked portions 92 are provided at predetermined intervals along the axial direction of the rising pipe portion 51. Here, the predetermined interval is an interval at which the position can be adjusted stepwise when positioning the riser pipe portion 51.

A part of the locking member 94 is formed so as to be able to be arranged in the locked portion 92 in a state of being inserted into the hole portion 93a of the base portion 93. The locking member 94 abuts on the inner surface of the hole 93a and the locked portion 92 in the vertical direction to restrict the vertical movement of the rising pipe portion 51.

As shown in FIG. 13, such a sand removing device 1H is raised by arranging the locking member 94 in a state where the hole portion 93a of the base portion 93 and the locked portion 92 are arranged so as to be continuous. The pipe portion 51 can be fixed to the ceiling portion 23. Therefore, according to such a sand removing device 1H, the rising pipe portion 51 can be detachably fixed to the ceiling portion 23 by the fixing portion 42H and the fixed portion 61H.

Further, since the sand removing device 1H can selectively use any of the locked portions 92 provided in the axial direction of the ascending pipe portion 51, the open end located in the processing portion 12 of the ascending pipe portion 51 The axial position can also be made variable.

Next, the sand removal device 1I, which is a modification of the sand removal device 1, will be described with reference to FIGS. 14 and 15. FIG. 14 is a cross-sectional view showing a configuration in the vicinity of the ceiling portion 23 and the rising pipe portion 51 as the main configuration of the sand removal device 1I. FIG. 15 is a top view showing the configuration of the sand removing device 1I in the vicinity of the ceiling portion 23 and the rising pipe portion 51.

As shown in FIG. 14, the sand removing device 1I includes a fixing portion 42I having a configuration different from that of the fixing portion 42. The fixing portion 42I includes a tightening portion 95 provided on the ceiling portion 23 and a tightening member 96 attached to the tightening portion 95. The other configurations of the sand removal device 1I are the same as those of the sand removal device 1, and the same reference numerals are given to the configurations equivalent to the sand removal device 1 in FIG. 14, and detailed description thereof will be omitted.

As shown in FIGS. 14 and 15, the tightening portion 95 is fixed to, for example, the upper surface of the ceiling portion 23, and is formed in an annular shape partially notched in the circumferential direction. The tightening portion 95 is made of, for example, a resin material that can be elastically deformed by attaching the tightening member 96. Further, the tightening portion 95 includes an annular seal portion 95a that is fixed to the inner peripheral surface and watertightly seals between the tightening portion 95 and the riser pipe portion 51 in a state where the tightening member 96 is attached to the tightening portion 95. ..

The tightening member 96 is configured so that the outer peripheral surface of the tightening portion 95 can be tightened. The tightening member 96 has, for example, an annular shape having an inner diameter slightly larger than the outer diameter of the tightening portion 95, and is formed in a shape in which a part is notched in the circumferential direction.

Further, the tightening member 96 is integrally provided at one end and the other end facing each other through the notch, and has a protruding portion 96a protruding from the outer peripheral surface. The protrusion 96a includes, for example, a hole through which a bolt 96b can be inserted and a nut 96c can be mounted. In such a tightening member 96, a bolt 96b is inserted into both of the two protruding portions 96a, and a nut 96c screwed into the bolt 96b is attached to tighten the tightening portion 95 arranged inside.

According to the sand removing device 1I configured in this way, the rising pipe portion 51 is tightened by arranging the rising pipe portion 51 inside the tightening portion 95 and tightening the tightening portion 95 with the tightening member 96. It is fixed to the part 95. That is, the rising pipe portion 51 is fixed to the ceiling portion 23. In the sand removing device 1I, the rising pipe portion 51 can be detachably fixed to the ceiling portion 23 by a simple operation of attaching the tightening member 96 to the tightening portion 95.

Further, since the sand removing device 1I can select any position in the axial direction of the rising pipe portion 51 to attach the tightening member 96, the end of the opening located in the processing portion 12 of the rising pipe portion 51 The axial position can also be made variable.

In the sand removing device 1I, the fixed portion of the rising pipe portion 51 is a part of the outer peripheral surface of the rising pipe portion 51. Further, as shown in FIG. 14, the rising pipe portion 51 of the sand removing device 1I enables the operator to grasp the axial position of the opening end in the processing portion 12, for example, in the axial direction on the outer peripheral surface. A plurality of markers 97 may be provided in stages along the line.

In the above embodiment, an example in which the first fastening member 43 is provided on the upper surface of the ceiling portion 23 has been described, but the present invention is not limited to this. For example, the first fastening member 43 may be provided on the lower surface of the ceiling portion 23. The position and shape of the fixed portion 61 provided on the riser pipe portion 51 are appropriately set according to the change in the position of the first fastening member 43. In this case, the riser pipe portion 51 and the opening 41 of the ceiling portion 23 form a flow path from the lower end of the riser pipe portion 51 to the upper side of the cylindrical portion 21. That is, the positional relationship between the first fastening member 43 and the fixed portion 61 can be appropriately set as long as the rising pipe portion 51 can be detachably fixed to the ceiling portion 23.

However, in order to improve the workability of the work of fixing the rising pipe portion 51 to the ceiling portion 23, the first fastening member 43 is provided on the upper surface side of the ceiling portion 23, and the fixed portion 61 of the rising pipe portion 51 is provided. Is preferably fixed on the upper surface side of the ceiling portion 23. Similarly, in various modifications of the fixed portion 42 and the fixed portion 61 described above, it is preferable that the fixed portion 61 is fixed on the upper surface side of the ceiling portion 23.

(Second Embodiment)
Hereinafter, the sand removal device 1J according to the second embodiment of the present invention will be described with reference to FIG. FIG. 16 is a cross-sectional view showing the vicinity of the cylindrical portion 21J and the ceiling portion 23J as the main configuration of the sand removing device 1J. The sand removal device 1J has a different configuration of the processing unit 12 and the outflow unit 14 as compared with the sand removal device 1, and other configurations are the same as those of the sand removal device 1. Therefore, in the sand removal device 1J shown in FIG. 16, the same reference numerals are given to the configurations equivalent to those of the sand removal device 1, and detailed description thereof will be omitted.

The sand removal device 1J includes a base portion 11, a processing portion 12J, an inflow portion 13, an outflow portion 14J, and an accumulation portion 15. Specifically, the sand removing device 1J includes a cylindrical portion 21J, a ceiling portion 23J, and a rising pipe portion 51J, and as compared with the sand removing device 1, the cylindrical portion 21, the ceiling portion 23, and the rising pipe portion The difference is that the configuration of 51 is different and that the lid 53 is not provided.

The cylindrical portion 21J is formed in a tubular shape that extends in the vertical direction and has an upper end and a lower end open. The cylindrical portion 21J is integrally provided with a ceiling portion 23J at the upper end, and a conical portion 22 is connected to the lower end. An inflow portion 13 is provided on the lower end side of the cylindrical portion 21J.

The ceiling portion 23J has an opening portion 41J and a fixing portion 42J. The ceiling portion 23J is configured so that the region at the upper end of the cylindrical portion 21J excluding the opening 41J can be closed. The ceiling portion 23J is integrally provided at the upper end of the cylindrical portion 21J, for example, and is formed to have a predetermined curved surface shape and bulge upward toward the cylindrical portion 21J.

The opening 41J is, for example, a circular opening continuous from the lower surface to the upper surface of the ceiling portion 23. The opening 41J is provided at the center of the ceiling 23J. Further, the opening 41J has a cylindrical tubular portion 41J that is integrally provided on the opening edge and extends upward.

The fixing portion 42J detachably fixes the rising pipe portion 51J to the ceiling portion 23J. The fixing portion 42J includes, for example, a flange portion 43J, a third fastening member 44J, a fourth fastening member 45J, and a sealing portion 46J.

The flange portion 43J is integrally provided on the upper surface of the tubular portion 41Ja. The flange portion 43J has a plurality of holes into which the third fastening member 44J can be arranged.

The third fastening member 44J is, for example, a bolt. The third fastening member 44J is configured to be insertable into each hole of the flange portion 43J.

The fourth fastening member 45J is a member that is fastened in cooperation with the third fastening member 44J. The fourth fastening member 45J is, for example, a nut screwed into the third fastening member 44J. The fourth fastening member 45J is provided in the same number as the third fastening member 44J, and is attached to each third fastening member 44J with the sealed portion 46J and the fixed portion 61J of the rising pipe portion 51J described later interposed therebetween.

The seal portion 46J watertightly seals between the flange portion 43J of the ceiling portion 23J and the outer peripheral surface of the riser pipe portion 51J. The seal portion 46J is, for example, a gasket formed of a resin material. The seal portion 46J is arranged between the flange portion 43J and the fixed portion 61J.

The riser pipe portion 51J is arranged in the opening 41J of the ceiling portion 23J. The riser pipe portion 51J is formed in a cylindrical shape extending in one direction and opening at both ends. The lower end of the riser pipe portion 51J is located inside the processing portion 12J, and the upper end is located outside the processing portion 12J. In the present embodiment, the lower end of the rising pipe portion 51J is located inside the processing portion 12, and the upper end is located outside the cylindrical portion 21 and above the ceiling portion 23. The portion of the riser pipe portion 51J located outside the cylindrical portion 21J constitutes the outflow portion 14J of the sand removal device 1J.

The riser pipe portion 51J has, for example, a fixed portion 61J provided on the outer peripheral surface of the middle portion on the upper end side. The fixed portion 61J is an annular rib including a plurality of holes through which the third fastening member 44J can be inserted. The fixed portion 61J is configured to be able to come into contact with the flange portion 43J of the ceiling portion 23J in the axial direction.

In such a sand removing device 1J, the seal portion 46J is arranged on the upper surface of the flange portion 43J of the ceiling portion 23, and the fixed portion 61J of the rising pipe portion 51J is arranged on the upper surface of the seal portion 46. By attaching the fastening member 44J and the fourth fastening member 45J, the rising pipe portion 51J is detachably fixed to the ceiling portion 23J.

According to the sand removing device 1J configured in this way, as in the sand removing device 1 according to the first embodiment, the rising pipe portion 51J is detachably configured with respect to the ceiling portion 23J. It is possible to replace it with another rising pipe portion having a different axial length and a different axial position of the opening end, or a rising pipe portion having a different inner diameter of the opening end. Further, the work of attaching / detaching the rising pipe portion 51 is a simple work of releasing the fastening between the third fastening member 44J and the fourth fastening member 45J, and the workability of replacing the rising pipe portion 51J is also high.

Therefore, the sand removal device 1J can adapt to the fluctuation of the flow rate by the simple operation described above. Therefore, in order to adapt to the fluctuation of the flow rate, it is not necessary to prepare another sand removing device and install it in place of the sand removing device in use, and the cost can be reduced.

As described above, according to the sand removal device 1J according to the second embodiment of the present invention, it is possible to adapt to the fluctuation of the flow rate at low cost.

In the above-mentioned example, the third fastening member 44J and the fourth fastening member 45J are attached to the ceiling portion 23J by mounting the third fastening member 44J and the fourth fastening member 45J on the fixed portion 61J provided in the middle of the flange portion 43J and the rising pipe portion 51J near the upper end. On the other hand, an example in which the rising pipe portion 51 is detachably fixed has been described, but the present invention is not limited to this.

For example, as shown in FIG. 17, the fixed portion 61J may be a flange portion provided at the upper end of the rising pipe portion 51J. In this case, the sand removing device 1J is inserted with the third fastening member 44J. A possible configuration may be further provided with a phase flange 47J and a second seal portion 48J that watertightly seals between the fixed portion 61J and the phase flange 47J. That is, the sand removing device 1J may be configured to detachably fix the rising pipe portion 51J to the ceiling portion 23J by sandwiching the fixed portion 61J between the flange portion 43J and the phase flange 47J. In this case, the portion of the rising pipe portion 51J located outside the cylindrical portion 21J and the phase flange 47J constitute the outflow portion 14J in the sand removal device 1J. As the phase flange 47J, the flange portion of the pipe forming the secondary side flow path of the rising pipe portion 51J may be used.

Further, as the fixing portion 42J, various modifications of the fixing portion 42 described in the first embodiment may be applied. That is, as long as the sand removing device 1J has a configuration in which the rising pipe portion 51J can be detachably fixed to the ceiling portion 23J, the configuration can be appropriately set. Further, the sand removing device 1J may be configured to change the axial position of the opening end located in the conical portion 22 of the rising pipe portion 51 by applying various modifications of the fixing portion 42.

The present invention is not limited to the above embodiment, and can be variously modified at the implementation stage without departing from the gist thereof. In addition, each embodiment may be carried out in combination as appropriate, in which case the combined effect can be obtained. Further, the above-described embodiment includes various inventions, and various inventions can be extracted by a combination selected from a plurality of disclosed constituent requirements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the problem can be solved and the effect is obtained, the configuration in which the constituent requirements are deleted can be extracted as an invention.

1 ... Sand remover, 11 ... Base part, 11a ... Base part, 11b ... Support part, 12 ... Processing part, 13 ... Inflow part, 14 ... Outflow part, 15 ... Accumulation part, 21 ... Cylindrical part, 22 ... Conical part, 23 ... Ceiling part, 41 ... Opening, 41Ja ... Tube part, 42 ... Fixed part, 43 ... First fastening member, 43Ga ... Seal part, 43J ... Flange part, 44 ... Second fastening member, 44Ga ... Contact part, 44J ... 3rd fastening member, 45J ... 4th fastening member, 46 ... Sealing part, 47J ... Phase flange, 48J ... 2nd sealing part, 51 ... Rising pipe part (tube body), 52 ... Sealing part, 53 ... Lid part , 53a ... Air valve, 54 ... Outflow pipe part, 55 ... Guide pipe part, 55a ... Second flange part, 61 ... Fixed part, 71 ... Accumulation chamber, 72 ... Discharge pipe, 73 ... Open / close valve, 81 ... Spacer part , 82 ... Attach part, 82Fa ... Tapered part, 82Fb ... First opening, 82Fc ... Second opening, 83 ... Outer pipe part, 84 ... Inner pipe part, 85 ... Second seal part, 91 ... Locking part, 91a ... Locking hole, 92 ... Locked part, 93 ... Base part, 93a ... Hole part, 93b ... Seal part, 94 ... Locking member, 95 ... Tightening part, 95a ... Seal part, 96 ... Tightening member, 96a ... projecting part, 96b ... bolt, 96c ... nut, 97 ... marker.

Claims (7)

At least the inner diameter on the lower end side gradually shrinks toward the lower end, and the lower end opens.
An inflow part that allows raw water to flow into the inside of the treatment part along the inner peripheral surface of the treatment part,
It is formed in a cylindrical shape with both ends open, one end is arranged coaxially with the processing part inside the processing part, and the other end is fluidly continuous with the secondary side of the processing part, and the end of the one end in the axial direction. A riser tube portion whose position and at least one of the inner diameters of the one end can be changed, and
A sand remover equipped with. The processing unit has a ceiling portion provided on the upper end side, and has a ceiling portion.
The riser pipe portion has a fixed portion provided on the other end side, and has a fixed portion.
By making the fixed portion removable from the ceiling portion, the position of the one end in the axial direction and at least one of the inner diameters of the one end are different from the rising pipe portion. The sand removal device according to claim 1, which can be changed to the other rising pipe portion. The sand removing device according to claim 2, wherein the fixed portion is fixed on the upper surface side of the ceiling portion. The fixed portion is a flange portion and is
The sand removal device according to claim 2 or 3, further comprising a spacer portion provided between the ceiling portion and the flange portion and for varying the distance between the ceiling portion and the flange portion. The rising pipe portion has an outer pipe portion provided with the fixed portion and an outer diameter equal to or less than the inner diameter of the front outer pipe portion, and a part thereof is arranged inside the outer pipe portion and is provided on the outer pipe portion. The sand removal device according to claim 2 or 3, further comprising an inner pipe portion whose axial position is variably fixed. The rising pipe portion is formed in a cylindrical shape with both ends open, one end is arranged coaxially with the processing portion inside the processing portion, and the other end is a pipe fluidly continuous to the secondary side of the processing portion. An attachment portion that is detachably fixed to the main body and the one end of the pipe body, has an opening end that opens inside the processing portion, and the opening end is formed to have an inner diameter smaller than that of the one end of the pipe body. The sand removal device according to claim 1 or 2, further comprising. A discharge port that is fluidly continuous with the secondary side of the riser pipe and discharges treated water to the outside,
The first or second aspect of the present invention further comprises a guide pipe portion connected to the other end of the riser pipe portion and the discharge port to guide the flow on the secondary side of the riser pipe portion to the discharge port. Sand remover.

Images