JP2020023789A - Cylindrical material inner surface cleaning device - Google Patents

Abstract

To provide a cylindrical material inner surface cleaning device which can reliably clean in a short time the inner surface of a hollow cylindrical material installed in a vertical pit.SOLUTION: A cylindrical material inner surface cleaning device 1 is provided in a vertically moveable manner inside a hollow cylindrical material 5 installed in a vertical pit 3. The cylindrical material inner surface cleaning device 1 includes one or more nozzles 7 capable of spraying cleaning fluid toward the inner surface of the hollow cylindrical material 5, moving means 9 which moves in the nozzle radial direction for making the nozzles 7 in contact with or away from the inner surface of the hollow cylindrical material 5 and nozzle rotating means 11 for rotating the nozzles 7 with the axis line of the hollow cylindrical material 5 being the center.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a cylindrical member inner surface cleaning apparatus.

  Patent Literature 1 discloses a device for removing deposits on the inner surface of a hollow pile. The attached matter removing device includes an annular ejection pipe, and the ejection pipe is provided with a plurality of ejection nozzles at positions facing the inner surface of the hollow pile. According to the attached matter removing device, the attached matter on the inner surface of the hollow pile is removed by injecting the cleaning fluid from the plurality of ejection nozzles.

JP 2017-43942 A

As disclosed in Patent Literature 1, even when the cleaning fluid is injected from the plurality of injection nozzles provided in the annular ejection pipe to the inner surface of the hollow pile, if the groundwater is accumulated in the hollow pile, the cleaning fluid is discharged by the groundwater. The momentum of the cleaning fluid is weakened when colliding with the inner surface of the hollow pile. For this reason, not only the cleaning time for removing the adhering matter is prolonged, but also there is a possibility that it cannot be sufficiently removed.
In view of the circumstances described above, an object of at least one embodiment of the present invention is to provide a cylindrical member inner surface cleaning apparatus capable of reliably cleaning the inner surface of a hollow cylindrical member installed in a vertical hole in a short time.

(1) A cylindrical member inner surface cleaning apparatus according to at least one embodiment of the present invention includes:
In a cylindrical material inner surface cleaning device arranged to be vertically movable in a hollow cylindrical material arranged in a pit,
One or more nozzles capable of injecting a cleaning fluid toward an inner surface of the hollow cylindrical member;
Nozzle radial direction moving means for moving the nozzle toward and away from the inner surface of the hollow cylindrical material,
Nozzle rotating means for rotating the nozzle about the axis of the hollow cylindrical material,
Is provided.

  According to the above configuration (1), the nozzle can be brought closer to the inner surface of the hollow cylindrical member by the nozzle radial direction moving means, and the cleaning fluid can be vigorously collided with the inner surface of the hollow cylindrical member. In addition, by rotating the nozzle by the nozzle rotating means, the cleaning fluid can be sprayed all around the inner surface of the hollow cylindrical member, and the inner surface cleaning device of the cylindrical member can be moved vertically to move the hollow member. The cleaning fluid can be sprayed over a predetermined region in the vertical direction with respect to the inner surface of the cylindrical member. Therefore, according to the above configuration (1), the inner surface of the hollow cylindrical member can be reliably cleaned in a short time.

(2) In some embodiments, in the above configuration (1),
A pump for discharging the fluid in the hollow cylindrical member out of the pit is further provided.
According to the above configuration (2), the fluid in the hollow cylindrical member can be purified by discharging the fluid in the hollow cylindrical member by the pump while supplying the cleaning fluid into the hollow cylindrical member through the nozzle. As a result, it is possible to suppress the reattachment of the deposit removed from the inner surface of the hollow cylindrical member, and it is possible to clean the inner surface of the hollow cylindrical member reliably in a short time.

(3) In some embodiments, in the above configuration (2),
The pump is a mixture jet pump.
According to the above configuration (3), by including the air-mixing jet pump as the pump, a fluid including earth and sand can be efficiently discharged out of the pit.

  According to at least one embodiment of the present invention, there is provided a cylindrical member inner surface cleaning apparatus capable of reliably cleaning the inner surface of a hollow cylindrical member installed in a vertical hole in a short time.

It is a figure showing roughly a cylindrical material inner surface cleaning device concerning one embodiment of the present invention. FIG. 2 is a diagram for explaining the number and arrangement of nozzles, and is a schematic partial cross-sectional view along the line II-II in FIG. 1. FIG. 4 is a diagram for explaining an example of a configuration of a nozzle radial direction moving unit. FIG. 4 is a diagram for explaining an example of a configuration of a nozzle rotating unit. FIG. 4 is a diagram for explaining an example of a configuration of a cleaning fluid supply unit for supplying a cleaning fluid to a rotating nozzle. It is a fragmentary sectional view corresponding to Drawing 2 of a cylindrical member inner surface cleaning device concerning other embodiments. It is a perspective view which shows roughly the nozzle of the modification applied to a cylindrical-material inner surface cleaning apparatus. It is a perspective view which shows schematically the nozzle and brush of the modification applied to a cylindrical-material inner surface cleaning apparatus. It is a figure which shows schematically the cylindrical material inner surface cleaning apparatus which concerns on other embodiment.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Absent.
For example, the expression representing a shape such as a square shape or a cylindrical shape not only represents a shape such as a square shape or a cylindrical shape in a strictly geometrical sense, but also an uneven portion or a chamfer as long as the same effect can be obtained. A shape including a part and the like is also represented.

FIG. 1 is a view schematically showing a cylindrical member inner surface cleaning apparatus (hereinafter, also simply referred to as a cleaning apparatus) 1 according to an embodiment of the present invention.
As shown in FIG. 1, the cleaning device 1 is for cleaning the inner surface of a hollow cylindrical member 5 disposed in a vertical hole 3 provided in the ground, and is capable of moving up and down in the hollow cylindrical member 5. Be placed. The pit 3 is, for example, a pile hole, and the hollow cylindrical member 5 is a steel pipe, a ready-made pile, or the like. For example, when constructing a cast-in-place pile, the cleaning device 1 is used for cleaning the inner surface of a steel pipe before placing concrete. Further, for example, in the method of embedding a hollow ready-made pile, the cleaning device 1 is used for cleaning the inner surface of the ready-made pile before injecting the cement milk.

  The cleaning device 1 has one or more nozzles 7, and the nozzles 7 can jet a cleaning fluid toward the inner surface of the hollow cylindrical member 5. The cleaning fluid injected by the nozzle 7 is, for example, water. A high-pressure cleaning fluid is supplied to the nozzle 7 from the ground.

  The cleaning device 1 has a nozzle radial direction moving unit 9 and a nozzle rotating unit 11. The nozzle radial moving means 9 is for moving the nozzle 7 toward and away from the inner surface of the hollow cylindrical member 5. The nozzle rotating means 11 is for rotating the nozzle 7 about the axis of the hollow cylindrical member 5.

According to the cleaning device 1 described above, while the nozzle 7 is rotated by the nozzle rotating means 11 in a state where the nozzle 7 is brought close to the inner surface of the hollow cylindrical member 5 by the nozzle radial moving means 9, the cleaning fluid is discharged from the nozzle 7. By spraying toward the inner surface of the hollow cylindrical member 5, it is possible to remove deposits on the inner surface of the hollow cylindrical member 5.
At this time, the nozzle 7 can be brought closer to the inner surface of the hollow cylindrical member 5 by the nozzle radial direction moving means 9 regardless of the inner diameter of the hollow cylindrical member 5, and the cleaning fluid vigorously collides with the inner surface of the hollow cylindrical member 5. Can be done. In addition, by rotating the nozzle 7 by the nozzle rotating means 11, the cleaning fluid can be sprayed over the entire inner surface of the hollow cylindrical member 5 and the cleaning device 1 can be moved in the vertical direction. The cleaning fluid can be sprayed over a predetermined region in the vertical direction with respect to the inner surface of the hollow cylindrical member 5. Therefore, according to the cleaning device 1 having the above-described configuration, the inner surface of the hollow cylindrical member 5 can be reliably cleaned in a short time.

FIG. 2 is a diagram for explaining the number and arrangement of the nozzles 7, and is a schematic partial cross-sectional view along the line II-II in FIG.
In some embodiments, as shown in FIG. 2, a plurality of nozzles 7 are arranged at intervals in the circumferential direction of the hollow cylindrical member 5, and for example, eight nozzles 7 are provided.
According to the above configuration, the cleaning fluid is ejected from the plurality of nozzles 7 arranged at intervals in the circumferential direction of the hollow cylindrical member 5 toward the inner surface of the hollow cylindrical member 5, thereby forming the inner surface of the hollow cylindrical member 6. Can be efficiently cleaned.

FIG. 3 is a diagram for explaining an example of the configuration of the nozzle radial direction moving means 9.
As shown in FIG. 3, the nozzle radial direction moving means 9 has a center axis 15, and the tiltable arm 17 is attached to the center axis 15. The number of the arms 17 corresponds to the number of the nozzles 7, and one or more arms 17 are arranged around the central axis 15.
A hydraulic cylinder 19 is attached to the center shaft 15 as a power source of the arm 17, and the arm 17 can be tilted in accordance with expansion and contraction of the hydraulic cylinder 19. For example, a movable ring 21 is slidably fitted to the center shaft 15, and a link rod 23 is pin-connected to the movable ring 21 and the arm 17. The movable ring 21 can move up and down along the center axis 15 according to the expansion and contraction of the hydraulic cylinder 19, and the arm 17 tilts with respect to the center axis 15 via the link rod 23 as the movable ring 21 moves up and down. Then, as the arm 17 tilts, the nozzle 7 attached to the tip of the arm 17 comes into contact with and separates from the inner surface of the hollow cylindrical member 5.
Note that the arm 17 may be directly attached to the center shaft 15 or may be pin-connected to a fixing ring 25 fitted to the center shaft 15 as shown in FIG.

FIG. 4 is a diagram for explaining an example of the configuration of the nozzle rotating unit 11.
As shown in FIG. 4, the nozzle rotating means 11 includes a hydraulic motor 27 as a power source, a gear box 29, and a drive shaft 31. By operating the hydraulic motor 27, the drive shaft 31 can be rotated via the gear box 29. The rotation of the drive shaft 31 is transmitted to the center shaft 15, whereby the nozzle 7 can be rotated about the center shaft 15.

  In some embodiments, the nozzle 7 is tiltably fixed to the arm 17. In this case, by adjusting the angle of the nozzle 7 in accordance with the tilt of the arm 17, the cleaning fluid can be jetted onto the inner surface of the hollow cylindrical member 5 at an appropriate angle.

FIG. 5 is a diagram for explaining an example of the configuration of the cleaning fluid supply means for supplying the cleaning fluid to the rotating nozzle 7.
The cleaning fluid supply means has a swivel 33 as shown in FIG. The swivel 33 has an inner cylinder 35 and an outer cylinder 37, and the inner cylinder 35 is rotatable relative to the outer cylinder 37. The inner cylinder 35 is connected to the drive shaft 31 and the center shaft 15, and can transmit rotation of the drive shaft 31 to the center shaft 15. On the other hand, the rotation of the outer cylinder 37 is restricted by the detent 38 so as not to rotate with the inner cylinder 35.

  The outer cylinder 37 is provided with an inlet 39a for a cleaning fluid, and the inner cylinder 35 is provided with an outlet 41a for a cleaning fluid. The inner cylinder 35 and the outer cylinder 37 are provided with an internal channel 43a extending between the inlet 39a and the outlet 41a. When the hydraulic cylinder 19 is used as a power source of the arm 17, the inner cylinder 35 and the outer cylinder 37 have inlets 39 b and 39 c for supplying hydraulic pressure to the hydraulic cylinder 19, outlets 41 b and 41 c, and internal passages. 43b and 43c are provided. Therefore, if the cleaning fluid or the hydraulic pressure is supplied from outside the pit 3 to the inlets 39a, 39b, 39c of the inner cylinder 35 through the pipe or the tube, the cleaning fluid or the hydraulic pressure can be supplied to the rotating nozzle 7 or the hydraulic cylinder 19. .

FIG. 6 is a partial cross-sectional view corresponding to FIG. 2 of a cleaning apparatus 1 according to another embodiment.
As shown in FIG. 6, the cleaning device 1 may further include a brush 45 that can abut the inner surface of the hollow cylindrical member 5. The brush 45 is attached, for example, beside the nozzle 7. According to this configuration, while the large deposits are removed by the brush 45, the deposits that cannot be removed by the brush 45 can be removed by the cleaning fluid. As a result, the inner surface of the hollow cylindrical member 5 can be reliably cleaned in a short time.

FIG. 7 is a perspective view schematically showing a nozzle 47 of a modified example applied to the cleaning device 1. The nozzle 47 has a plurality of injection ports 47a. If a nozzle 47 is attached to each arm 17, the area that can be cleaned can be increased, and the inner surface of the hollow cylindrical member 6 can be reliably cleaned in a short time.
Note that a brush 45 may be provided beside the nozzle 47 as shown in FIG.

  In some embodiments, the cleaning device 1 further includes a pump 49 for discharging the fluid in the hollow cylindrical member 5 out of the pit 3.

  According to the above configuration, the fluid in the hollow cylindrical member 5 is purified by discharging the fluid in the hollow cylindrical member 5 by the pump 49 while supplying the cleaning fluid into the hollow cylindrical member 5 through the nozzle 7. it can. As a result, reattachment of the deposits removed from the inner surface of the hollow cylindrical member 5 can be suppressed, and the inner surface of the hollow cylindrical member 5 can be reliably cleaned in a short time.

In some embodiments, as shown in FIG. 4, the pump 49 is a submersible pump 49a, which is connected to the upper end of the drive shaft 31 via a rotary joint 50. The drive shaft 31, the inner cylinder 35 of the swivel 33 and the center shaft 15 are hollow, and fluid can be sucked from the lower end of the center shaft 15. A drain pipe 51 is connected to the submersible pump 49a, and the fluid can be discharged out of the pit 3 through the drain pipe 51.
In addition, the rotation stop 53 prevents the submersible pump 49a from rotating together (see FIG. 1).

  In some embodiments, a trumpet-shaped suction port 55 is provided at the lower end of the central shaft 15 as shown in FIG. The trumpet-shaped suction port 55 is located below the nozzle 7, and can efficiently suck the attached matter removed from the inner surface of the hollow cylindrical member 5.

FIG. 9 is a view schematically showing a cleaning apparatus 1 according to another embodiment of the present invention.
As shown in FIG. 9, in some embodiments, the pump 49 is a mixture jet pump 49b. The air-mixing jet pump 49b is provided, for example, at the lower end of the central shaft 15, and is configured by supplying high-pressure air and high-pressure water into the central shaft 15. The high-pressure air and high-pressure water are injected upward into the central shaft 15. Also in this case, the fluid is discharged out of the pit 3 via the hollow center shaft 15 and the drive shaft 31.
According to the above configuration, the pump 49 is constituted by the air-mixing jet pump 49b, whereby the fluid containing earth and sand can be efficiently discharged out of the pit 3.
The high-pressure air and high-pressure water to be supplied to the air-jet pump 49b can also be supplied through the swivel 33 by adding an inlet, an outlet, and an internal flow path to the swivel 33.
Further, the pump 49 does not need to be arranged in the shaft 3, and may be arranged outside the shaft 3.

  In some embodiments, as shown in FIGS. 1 and 9, the cleaning device 1 is suspended from the ground by a crane via a drill pipe 57 and a Kelly bar rod 59, and the hollow cylindrical member 5 is operated by operating the crane. Moved up and down within. When the kelly bar rod 59 is used, a rotational reaction force generated by the rotation of the nozzle rotating means 11 can be received on the ground.

  Lastly, the present invention is not limited to the above-described embodiment, but also includes a modification of the above-described embodiment and a combination thereof.

1 Inner surface cleaning device for cylindrical material 3 Vertical hole (pile hole)
5 Hollow cylindrical material 7 Nozzle 9 Nozzle radial direction moving means 11 Nozzle rotating means 15 Center shaft 17 Arm 19 Hydraulic cylinder 21 Movable ring 23 Link rod 25 Fixed ring 27 Hydraulic motor 29 Gear box 31 Drive shaft 33 Swivel 35 Inner cylinder 37 Outer cylinder 38 Detents 39a, 39b, 39c Inlets 41a, 41b, 41c Outlets 43a, 43b, 43c Internal flow path 45 Brush 47 Nozzle 47a Injection port 49 Pump 49a Submersible pump 49b Air-mixing jet pump 50 Rotary joint 51 Drain pipe 53 Detent 55 Suction port 57 Drill tube 59 Kelly bar rod

Claims (3)

In a cylindrical material inner surface cleaning device arranged to be vertically movable in a hollow cylindrical material arranged in a pit,
One or more nozzles capable of injecting a cleaning fluid toward an inner surface of the hollow cylindrical member;
Nozzle radial direction moving means for moving the nozzle toward and away from the inner surface of the hollow cylindrical material,
Nozzle rotating means for rotating the nozzle about the axis of the hollow cylindrical material,
A cylindrical member inner surface cleaning apparatus comprising:   The apparatus for cleaning the inner surface of a cylindrical member according to claim 1, further comprising a pump for discharging a fluid in the hollow cylindrical member out of the pit. The apparatus according to claim 2, wherein the pump is an air-jet pump.

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