JPH07136608A - Cleaning device for tank - Google Patents

Abstract

PURPOSE:To provide a cleaning device by which cleaning of the inside of a tank is executed when a column is provided in the inside of the tank. CONSTITUTION:A rotary supporting member 10 and a column-mounted supporting member for supporting the rotary supporting member 10 are provided to a column 1c in a tank 1. The rotary supporting member 10 rotatably supports a spray pipe 5 fitted with a nozzle 6 around the column 1c. The spray pipe 5 is swung and rotated in the horizontal direction by reaction force caused by spout through the nozzle 6 and also the spray pipe 5 is vertically moved by driving a vertically moving means which elevates/lowers the column-mounted supporting member along the column 1c. Thereby, the internal circumferential wall 1a of the tank 1 is cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for cleaning the inner wall of a tank containing chemicals.

[0002]

2. Description of the Related Art In a tank for storing chemicals, it is necessary to clean the inside of the tank when changing the chemicals to be stored. Conventionally, this type of cleaning work has been performed manually by an operator after discharging the chemicals stored in the tank, but the present inventors are currently applying for a patent. -210080, the cleaning solution disclosed in Japanese Patent Application No. 5-27166, the tank cleaning apparatus disclosed in Japanese Patent Application No. 5-27166, and the cleaning method disclosed in Japanese Patent Application No. 5-91832 have already been developed, and good cleaning effects have been achieved.

In the above-described tank cleaning device, a supply hose is hung along a wire from a ceiling hole of a tank having no column therein, a spray pipe is connected to the tip of the hose, and the spray pipe is suspended by the wire. The spray tube is hung up and sprayed with washing water or cleaning liquid from the nozzle attached to the tip of the spray tube to rotate the spray tube in the horizontal direction, and the hose and wire are paid out or wound up to move the spray tube in the vertical direction. The peripheral wall in the tank is cleaned.

[0004]

However, even in the above-described tank cleaning device, when columns are installed in the tank, a supply hose connected to a spray pipe for spraying cleaning water or cleaning liquid, and The wire that suspends the spray pipe from the ceiling is entangled with the pillar and the spray pipe does not rotate, or the pillar in the rotation range of the spray pipe interferes with the spray pipe and the spray pipe does not rotate. There is a problem that you cannot do it.

An object of the present invention is to provide a cleaning device capable of cleaning the inside of a tank even if it has a pillar inside the tank.

[0006]

A typical structure of a tank cleaning device according to the present invention is a cleaning device for cleaning an inner wall of a tank having a column therein, wherein the column in the tank extends from the inner wall of the tank. A spraying pipe having a length corresponding to, and having a nozzle for injecting cleaning water, cleaning steam or cleaning liquid at one end, and a pump having one end connected to the spraying pipe and the other end supplying water, or A supply hose connected to a water vapor generator or a container containing a cleaning liquid via a pump, a rotation support member that supports one end of the spray pipe, and a column in the tank that engages with the rotation support member. A column support member that rotatably supports the rotation support member around the column, and a vertical movement unit that moves the column support member in the vertical direction of the column according to the progress of the cleaning operation. And tank cleaning equipment A.

[0007]

Since the tank cleaning apparatus according to the present invention is constructed as described above, the pillar supporting member provided on the pillar in the tank to be cleaned is moved up and down by the vertical moving means to move the spray pipe according to the cleaning operation. The height can be changed.

Further, since the rotation supporting member for supporting the spray pipe is configured to be rotatable by engaging with the pillar support member, the spray pipe is propelled by the reaction of the jet jet jetted from the nozzle provided at the tip of the spray pipe. It can be rotated in a substantially horizontal direction around.

Therefore, the inner wall of the tank can be cleaned in the arcuate upper and lower range centered on the column in the tank by injecting the cleaning liquid, water or steam from the nozzle at the tip of the spray pipe.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tank cleaning apparatus according to the present invention will be specifically described with reference to the drawings. The cleaning apparatus shown in the figure is mainly configured to clean the peripheral wall 1a of the tank 1. As the order of description, first, the overall configuration of the apparatus will be described, and subsequently, the distribution pipe support portion, and the rotation operation and the direction changing operation of the distribution tube will be described.

(1) {Description of Overall Configuration} FIG. 1 is a diagram illustrating the overall configuration of the cleaning device, and FIG. 2 is a diagram illustrating the disposition of spray pipes disposed in the tank. In the figure, a tank 1 is a cylindrical tank having a peripheral wall 1a and a ceiling 1b, and is provided with a column 1c at a substantially central portion inside thereof, and has a height and an inner diameter corresponding to a storage volume. Have For example, a tank with a volume of 300 kiloliters has a height of about 10 m and an inner diameter of about 7.8 m.

A ladder 2 for raising and lowering is provided inside the tank 1, and two holes 3 are provided in the ceiling 1b. The holes 3 are arranged on a straight line centered on the pillar 1c. Further, a manhole 4 is formed below the peripheral wall 1a. A groove 1e is formed near the pillar 1c on the bottom plate 1d.

Dispersion pipes 5 and 40, which are supported by post-supporting members 20 and rotation support members 10 to be described later so as to be rotatable in the horizontal direction around the columns 1c, are arranged inside the tank 1 and have a peripheral wall 1a. The cleaning water, the cleaning water vapor, or the cleaning liquid is selectively sprayed onto the. In this embodiment, the case of injecting the cleaning liquid will be mainly described, but the case where cleaning water or cleaning steam is used can be omitted because the same effect can be obtained with the same configuration.

The distribution pipes 5 and 40 are the distance from the pillar 1c of the tank 1 to the peripheral wall 1a (when the ladder is within the cleaning range, the dimension of the ladder 2 is subtracted from the distance from the pillar 1c of the tank 1 to the peripheral wall 1a). Distance)) and is made of stainless steel pipe. Further, nozzles 6, 41 for injecting a pressurized cleaning liquid in a predetermined direction are provided at the tips of the spray pipes 5, 40.
Are connected to each other, and the nozzle 6 and the spray pipe 5 are attached so as to integrally rotate about the axis of the spray pipe 5.

A supply hose 9 is connected to the other end of the spray pipe 5 via a swivel joint 7 and an elbow 8 shown in FIG. 3, and the spray pipe 5 and the supply hose 9 are rotatably connected to each other. A supply hose 43 is connected to the other end of the spray pipe 40 via an elbow 42 shown in FIG.

The supply hose 43 is connected to the supply hose 9 via a tee 44 as shown in FIG. The supply hose 9 is guided to the outside of the tank 1 through the manhole 4, and is connected to a container 52 containing a cleaning liquid via a heater 50 and a pump 51. The heater 50 has a function of heating the cleaning liquid supplied, and the heater
By driving the pump 50 and the pump 51, the heated cleaning liquid to which a pressure of up to 5 atm is applied can be supplied to the nozzle 6 and the nozzle 41.

Further, the pump 51 supplies the cleaning liquid contained in the container 52 to the spray pipes 5 and 40, and also the bottom plate 1 of the tank 1.
The cleaning liquid accumulated in the groove 1e formed in d is sucked through the hose 53 and supplied again to the spray pipes 5 and 40.

The pump 54 is a pump for supplying cleaning water, and by using the supply hose 9 connected to the pump 54 according to the process of cleaning, the cleaning with a pressure of up to 150 atm is applied. It is configured so that water can be supplied to the nozzles 6 and 41. When the cleaning steam is jetted from the nozzles 6 and 41 for cleaning, it is possible to inject the steam from the nozzles 6 and 41 by connecting the supply hose 9 to a steam generator (not shown).

The nozzles 6 and 41 spray the cleaning liquid in a curtain shape having a preset angle, respectively, to form a peripheral wall 1 of the tank 1.
It has a function of spraying on a. Here, the injection direction of the cleaning liquid in the horizontal plane by the nozzle 6 is set to be inclined in one direction from the axis of the spray pipe 5, while the injection direction of the cleaning liquid by the nozzle 41 is in the axial direction of the spray pipe 40. It is set.

Therefore, due to the reaction of sprayed cleaning liquid from the nozzle 6 to the spray pipe 5, the pillar 1c
A force for rotating the nozzle 6 in the direction opposite to the tilt direction of the nozzle 6 acts, and this force can rotate the spray pipe 5 and the spray pipe 40 in the horizontal direction about the column 1c.

(2) {Explanation of the structure of the spray pipe support portion} Next, the spray pipe 5 and the spray pipe 40 centering on the column 1c of the tank 1
The configuration of the supporting portion that supports the rotatably in the horizontal direction will be described. FIG. 3 is a partially enlarged view showing the spraying pipe support portion in FIG. 1, and FIG. 4 is a schematic plan view showing the engagement between a locking bar and a rotating bar for restricting the rotation range of axial rotation of the spraying pipe 5. 5 is a schematic cross-sectional view showing the engagement between the direction changing member that changes the injection direction of the nozzle 6 and the rotating bar, and FIG. 6 is a schematic view showing the relative positional relationship between the rotating bar, the locking bar, and the direction changing member. It is a figure.

In FIG. 3, rotating bars 5a and 5b are formed at right angles to the longitudinal direction of the spray pipe 5 at the end of the spray pipe 5 on the downstream side of the cleaning liquid injection from the swivel joint 7 connected to the end of the spray pipe 5. In addition, they are provided in a line in opposite directions, and are configured to integrally rotate with respect to the rotation of the spray pipe 5 about its axis.

As shown in FIGS. 3 and 4, the spray pipe 5 is rotatably supported about its axis, and is engaged with a rail 21 of a pillar support member 20 described later to rotate around the pillar 1c. The support member 10 includes a cylindrical main body 11, a cylinder 12 protruding from the main body 11, a beam 13 that supports the cylinder 12 on the main body 11, and a support bar 16 that fixes the spray pipe 40 on the opposite side. It is configured.

The cylinder 12 is for inserting the spray pipe 5 into the inside thereof, and smoothly rotating and supporting the spray pipe 5 in the axial direction. Further, as shown in FIG. 3, a pressing member 17 is provided at a predetermined position inside the side surface of the main body 11, and an end portion of the pressing member 17 is expanded and contracted to spread the spray pipe 5
Is contacted with an elbow 8 connected via a swivel joint 7, and the end of the spray tube 5 on the side of the column 1c is pressed downward to hold the spray tube 5 in equilibrium. The shaft rotation in the cylinder 12 is made smoother.

Further, as shown in FIG. 4 to FIG.
Locking bars 15a, 15b, which contact the rotating bars 5a, 5b provided at the ends of the spray pipe 5 and define the rotation angle range of the axial center of the spray pipe 5, at predetermined positions inside the side faces of the spray pipe 5. Is provided. Therefore, after the turning angles of the turning bars 5a and 5b are once set, the turning bar 5a contacts one of the locking bars 15a and 15b and is locked by the reaction of the jet flow from the nozzle 6.

Further, as shown in FIG. 4, a rotary roller 14 which is rotatably supported by the main body 11 is arranged on the upper end of the main body 11 in four directions. The roller 14 will be described later. It is configured to engage with the rail 21 of the pillar support member 20 and rotate on the rail 21.

The above-mentioned pillar support member 20 is composed of a ring-shaped main body 26 having a slightly larger diameter corresponding to the outer diameter of the main body 11 of the rotation support member 10. A ring-shaped rail 21 is formed so as to correspond to the roller 14. Therefore, on the rail 21, the roller 14
When the rotation supporting member 10 rotates,
It is possible to rotate the spray pipes 5 and 40 in the horizontal direction about the column 1c by rotating them.

Further, anti-vibration wheels 22 are arranged in four directions on the upper end portion of the main body 26 of the pole supporting member 20, and when the pole supporting member 20 is moved up and down by using a vertically moving means described later,
Alternatively, in a stopped state, the shake prevention wheels 22 are brought into contact with the pillars 1c of the tank 1 to prevent the spray pipes 5 and 40 that are rotated in the horizontal direction to perform the cleaning work from shaking, and the pillar support members are also provided. 20 can be raised and lowered smoothly.

The anti-shake wheel 22 has an adjusting screw 22.
Since the wheel 22 is moved in the radial direction of the pole support member 20 by adjusting a, and the distance from the pole 1c can be adjusted, a plurality of poles 1c having different outer diameters or shapes can be obtained.
Can be applied to.

Further, as shown in FIGS. 5 to 6, direction changing members 23 and 24 are fixed to predetermined positions of the main body 26 of the pillar support member 20 toward the lower inside of the rotation support member 10. And are arranged at positions corresponding to the rotating bars 5a and 5b of the spray pipe 5, respectively. The direction changing members 23 and 24 include upper bars 23a and 24a and lower bars 23b and 24b, respectively.
Each bar 23a, 23b, 24a, 24b is the main body of the rotation support member 10.
It is arranged toward the radially outer side of 11.

As shown in FIG. 5, the direction changing members 23 and 24 are formed by bending them at a predetermined angle θ at the positions where the respective upper bars 23a and 24a are projected. The angle θ is configured to be equal to the rotation angle of the rotation bars 5a and 5b, that is, the rotation angle about the axis of the spray tube 5.

Accordingly, the main body 26 of the pillar support member 20 is provided with the direction changing members 23 and 24 having upper bars 23a and 24a and lower bars 23b and 24b, respectively, which are in contact with the rotating bars 5a and 5b, at predetermined positions.
It is possible to set the jet direction of the cleaning liquid jetted from the nozzle 6 of the spray pipe 5 to a desired angle by arranging the nozzle at a desired position and setting the angle θ appropriately.

The structure of the vertically moving means for moving the pole support member 20 in the vertical direction of the column 1c in accordance with the progress of the cleaning operation will be described below. A suspension beam 30 is formed through the hole 3, and a pulley 31 is fixed to a substantially central portion of the beam 30. A wire 32 is stretched around the pulley 31, and one end of the wire 32 is connected to a hook 25 formed at the upper end of the pole support member 20. The other end of the wire 32 is wound around the winding drum 34 provided outside through the manhole 4 of the tank 1 via the pulley 33 provided at the main portion of the pillar 1c.

Therefore, the pole support member 20 can be moved up and down along the pole 1c by driving the winding drum 34 to wind or unwind the wire 32, and the spray tube 5 can be moved along with the progress of the cleaning operation. Can be moved up and down.

The suspension beam 30 may be suspended by fixing both ends 30a, 30b to the flanges installed in the holes 3, or the both ends 30a, 30b may be suspended by using an external crane. It's okay. Further, as another embodiment, the pulley 31 can be configured to engage with a hook provided near the pillar 1c of the ceiling 1b.

(3) {Explanation of rotating operation and direction changing operation of the spray tube} Here, the rotating operation and the direction changing operation of the spray tube 5 will be described mainly with reference to FIG. By means of means, the rotary support member 10 and the spray tubes 5 and 40 engaging with the on-pillar support member 20 are stopped at a predetermined height of the column 1c.

Here, in the initial state, for example, as shown in FIG. 6, it is assumed that the turning bar 5a fixed to the end of the spray tube 5 is brought into contact with the upper bar 23a of the direction changing member 23 and locked. .
At this time, the rotating bar 5a is in contact with and locked by the locking bar 15a.

Further, the cleaning liquid under pressure is jetted from the nozzle 6 attached to the tip of the spray pipe 5 toward the peripheral wall 1a of the tank 1 in the direction shown in FIG. 6, and the spray pipe is reacted by the reaction of the jet flow. 5 receives a force on the opposite side of the jet direction of the jet flow, and the spray pipe 5 rotates substantially horizontally in the direction of arrow a in FIG. 6 about the column 1c.

When the spray pipe 5 is further rotated in the direction of arrow a, the spray bar 5 is axially rotated in the direction of arrow b shown in FIG. 6 while the rotary bar 5a is locked by the upper bar 23a. Is brought into contact with the lower bar 23b of the direction changing member 23 and locked. At this time, the rotating bar 5a separates from the locking bar 15a while rotating in the direction of the arrow b, and comes into contact with and locks with the locking bar 15b.

At this time, the nozzle 6 rotates integrally with the axial rotation of the spray pipe 5 to change the jet direction of the jet flow, and the spray pipe 5 is centered on the column 1c by the reaction of the jet flow in the changed direction. And starts rotating substantially horizontally in the direction opposite to the arrow a in FIG. At this time, the rotating bar 5a is in contact with and locked by the locking bar 15b.

Further, when the spray pipe 5 is horizontally rotated in the direction opposite to the arrow a, the rotating bar 5a causes the upper bar 24a of the direction changing member 24 to rotate.
While being abutted against and locked by, the spray pipe 5 is axially rotated in the direction opposite to the arrow b shown in FIG. 6, and the rotating bar 5b is brought into contact with the lower bar 24b of the direction changing member 24 and locked. At this time, the rotating bar 5
While rotating in the direction opposite to the arrow b, a is separated from the locking bar 15b and abuts on the locking bar 15a to be locked.

At this time, similarly to the above, the nozzle 6 rotates along with the axial rotation of the spray pipe 5 to change the jet direction of the jet flow, and the spray pipe 5 is centered on the column 1c by the reaction of the jet flow in the changed direction. Then, rotation is started substantially horizontally in the direction of arrow a in FIG. At this time, the rotary bar 5a is brought into contact with the locking bar 15a and locked.

By repeating the above-described series of operations, the spray pipe 5 is constructed so as to repeat the swing around the column 1c at a predetermined angle. Therefore, it is possible to inject the cleaning liquid onto the peripheral wall 1a of the tank 1 within a predetermined arc range corresponding to the swing. In addition to this, a pillar support member
By raising and lowering 20 by the vertically moving means, it is possible to inject the cleaning liquid onto a predetermined side surface of the peripheral wall 1a of the tank 1.

Using the cleaning device constructed as described above,
The case of cleaning the peripheral wall 1a of the tank 1 by injecting the cleaning liquid will be described. In FIG. 1, the hole 3 in the ceiling 1b of the tank 1 is illustrated.
The suspension beam 31 with the pulley 32 attached thereto is tensioned by a crane arranged outside, and the integrated spray pipes 5, 40, the rotation support member 10, the pillar support member 20 and the like are inserted into the tank 1 from the manhole 4. And rotation support member 10, pillar support member
20 joints (not shown) are opened, set around the pillar 1c, and the joints are closed.

Next, the rotation roller 14 of the rotation support member 10 is placed on the rail 21 of the pole support member 20 and engaged with each other. Further, the anti-shake wheel 22 is adjusted by the set screw 22a so as to properly contact the column 1c.

Next, one end of the wire 32 wound around the winding drum 36 installed outside the tank 1 is supported on the pillar via a pulley 33 attached to the head of the pillar 1c and a pulley 31 attached to the suspension beam 30. Hang on the hook 24 of the member 20. Then, by connecting the supply hoses 9 and 43 to the spray pipes 5 and 40, respectively, the cleaning preparation is completed.

First, the winding drum 34 is driven to wind up the wire 32, and the distribution pipes 5 and 40 are wound at a position near the ceiling 1b of the tank 1 and at a position where the suspension pipes 30 and 40 are not in contact with the suspension beam 30 and are substantially horizontal. Stop the torso 34. At this time, when the spray pipe 5 and the spray pipe 40 are in equilibrium and cannot maintain a horizontal position, the set screw 16a of the support bar 16 supporting the spray pipe 40 is loosened to adjust the position of the spray pipe 40. Can be balanced.

If necessary, a predetermined balance weight can be attached to the side of the spray pipe 40 to maintain equilibrium. Further, instead of the spray pipe 40, a balance weight having the same weight as that of the spray pipe 5 can be used. By installing and maintaining equilibrium,
Cleaning work can be performed only with the spray pipe 5, for example, the pillar 1
It is possible to clean a tank where c is not in the center or where multiple columns are installed inside.

Next, when the heater 50 and the pump 51 are driven, the cleaning liquid is supplied from the container 52 to the pump 51 through the hose 55, and becomes the pressurized cleaning liquid via the pump 51. The pressurized cleaning liquid is supplied to the heater 50 through the supply hose 9 and warmed to at least 20 ° C to 90 ° C. The warmed cleaning liquid passes through the supply hose 9 and is sprayed from the nozzles 6 and 41 of the spray pipes 5 and 40 in a shower shape.

Simultaneously with the injection of the cleaning liquid, the spray pipes 5 and 40 start horizontal rotation in one direction (for example, the direction of arrow a in FIG. 6), and the spray pipes are rotated as described in the description of the rotation operation and the direction change operation. The pipes 5 and 40 swing around the pillar 1c in a predetermined arc, and spray the cleaning liquid onto the peripheral wall 1a. When the winding drum 34 is driven and the wire 32 is sent out in response to this swing operation, the pole support member 20 connected to the wire 32 is lowered to lower the spray tubes 5 and 40.

As in this embodiment, the central pillar 1 is provided in the tank 1.
When there are no obstacles other than c, the spray pipes 5 and 40 are swung every half circumference of the tank 1 to clean the tank 1, and the cleaning of the entire peripheral wall 1a is completed. As another embodiment, when there are a plurality of pillars or other obstacles in the tank 1, only the spray pipes 5, 40 or the spray pipes 5 are provided between the pillars and the pillars or between the pillars and the other obstacles. In the case where there are multiple pillars or other obstacles in the tank by installing the same and performing the swing cleaning in the same manner as described above, and repeating the swing cleaning between each pillar and the pillar or between the pillar and other obstacles. It is also applicable to.

In this embodiment, the case where the cleaning liquid is supplied to the spray pipes 5 and 40 for cleaning has been mainly described. However, as described above, the supply hose 9 is not pumped through the heater 50 but the pump 54.
It is possible to clean the peripheral wall 1a of the tank 1 by connecting it to the above, and when the supply hose 9 is connected to a steam generator (not shown), it is possible to supply steam for cleaning. .

[0053]

Since the tank cleaning apparatus according to the present invention has the above-described structure and operation, even if a pillar or another apparatus is installed in the tank, the tank cleaning apparatus can be obstructed by swing cleaning. The inner wall surface of the tank can be cleaned without using.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an entire configuration of a cleaning device of the present invention.

FIG. 2 is a view for explaining the arrangement of spray pipes arranged in a tank.

FIG. 3 is a partially enlarged view showing a spray pipe support portion in FIG.

FIG. 4 is a schematic plan view showing the engagement between a locking bar and a rotating bar that regulates the rotation range of axial rotation of the spray tube 5.

FIG. 5 is a schematic cross-sectional view showing engagement between a turning member that changes the jetting direction of the nozzle 6 and a rotating bar.

FIG. 6 is a schematic diagram showing a relative positional relationship among a rotation bar, a locking bar, and a direction changing member.

[Explanation of symbols]

1 ... Tank, 1a ... Peripheral wall, 1b ... Ceiling, 1c ... Pillar, 1d
... bottom plate, 1e ... groove, 2 ... ladder, 3 ... hole, 4 ... manhole, 5 ... spreading pipe, 5a, 5b ... rotating bar, 6 ... nozzle,
7 ... Swivel joint, 8 ... Elbow, 9 ... Supply hose, 10 ... Rotation support member, 11 ... Main body, 12 ... Cylinder, 13
... Beams, 14 ... Rotating rollers, 15a, 15b ... Locking bars, 16 ... Support bars, 16a ... Set screws, 17 ... Pressing members, 20 ... Pillar support members, 21 ... Rails, 22 ... Anti-shake wheels, 23, 24 ... Direction changing member, 23a, 24a ... Upper bar, 23b, 24b ... Lower bar, 25
… Hooks, 26… Main body, 30… Suspended beams, 31… Pulleys, 32… Wires, 33… Pulleys, 34… Winding cylinders, 40… Spreading tubes, 41… Nozzles, 42
… Elbow, 43… Supply hose, 44… Tee, 50… Heater, 51… Pump, 52… Vessel, 53… Hose, 54… Pump,
55 ... Hose

Claims (3)

[Claims] 1. A cleaning device for cleaning an inner wall of a tank having a pillar therein, the cleaning apparatus having a length corresponding to the inner wall of the tank from the pillar in the tank and at one end of which cleaning water or cleaning steam or cleaning liquid is provided. A spray pipe equipped with a nozzle for spraying, one end of which was connected to the spray pipe and the other end of which was connected to a pump for supplying water, a steam generator, or a container containing a cleaning liquid via the pump. A supply hose, a rotation support member that supports one end of the spray pipe, a pillar support member that engages the rotation support member and rotatably supports the rotation support member around a pillar in the tank, An apparatus for cleaning a tank, comprising: an up-and-down moving unit that moves the pillar support member in the vertical direction of the pillar according to the progress of the cleaning operation. 2. A rotating bar extending perpendicularly to the longitudinal direction of the distribution pipe, which is fixed to the end of the distribution pipe, and a rotation bar which is provided on the pillar support member and which contacts the rotation bar. A direction changing member that contacts and rotates the rotating bar around the axis of the spray pipe; and a locking bar that is provided on the rotation supporting member and defines a rotation angle range of the rotating bar. The tank cleaning device according to claim 1. 3. The tank cleaning device according to claim 1 or 2, wherein another spray pipe or balance weight is provided on the column in a direction opposite to the spray pipe.