JPH07214023A - Tank cleaning method - Google Patents

Abstract

PURPOSE:To provide a tank cleaning method capable of uniformly cleaning the inside of a tank by effectively jetting a cleaning water into the inside of the tank irrespective of the shape of the tank or the position of a nozzle. CONSTITUTION:The nozzle 5 rotating around a tilted axis is formed at the tip part of a feed pipe part 3 introducing the cleaning water W fed into the tank through a rotary head part 4 rotating around the axis, cleaning water jetting ports 37 and 38 facing in one direction along the axis direction of the feed pipe 3 and in the opposite direction respectively are formed in the nozzle 5 and the cleaning water jetting port 37 facing to an area having large cleaning area or an area having a lot of dirt is formed to have larger aperture than that of the other. And inside of the tank 1 is uniformly cleaned by effectively distributing and jetting the cleaning water irrespective of the shape of the tank 1 or the position of the nozzle 5 from the cleaning water jetting ports 37, 38 while rotating the nozzle 5 and the rotary head part 4 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank cleaning method for efficiently cleaning various tanks such as a beer brewing tank.

[0002]

2. Description of the Related Art As a method for cleaning the inside of a tank, for example, a horizontal shaft is provided at a lower end portion of an insertion pipe portion which is inserted into the tank from an upper portion of the tank and which introduces cleaning water, through a rotary head which rotates around its vertical axis. A nozzle that rotates around is provided, and this nozzle is formed with wash water injection ports of the same diameter facing upward and downward,
There is a method of cleaning the inside of the tank by rotating the nozzle and the rotating head by, for example, a turbine to spray cleaning water from a spray port.

According to this cleaning method, the cleaning water is evenly sprayed upward and downward in the tank with the nozzle as a boundary.
By arranging the nozzle in the center of the tank, the entire area of the tank can be cleaned regardless of the position and degree of dirt.

[0004]

However, in the conventional cleaning method, when the tank is formed in a vertically long shape such as a beer brewing tank, the insertion pipe portion is lengthened to make the nozzle inside the tank. It was difficult to clean the inside of the tank cleanly and efficiently unless it was placed at the center of the tank. That is, as shown in FIG. 5, when the length of the insertion tube portion 3 is short and the rotary head 4 is located above the center of the tank 1, the nozzle 5 serves as a boundary in the tank 1. Since the cleaning area in the upper region E1 is small and the cleaning area in the lower region E2 is large, it is difficult to evenly clean the inside of the tank 1 by the method of uniformly spraying the cleaning water in the vertical direction.

Further, in general, the inside of the tank is more dirty in the lower part than in the upper part, and when there is a region of different dirt in the container as described above, even if the nozzle is arranged at the center of the tank, It is difficult to clean the inside of the tank evenly by the method of cleaning by spraying the cleaning water evenly in the vertical direction. Therefore, in the conventional cleaning method, a portion that cannot be completely cleaned easily occurs in the tank, and it is necessary to rework. Therefore, it has been desired to develop a new cleaning method capable of cleaning the inside of the tank evenly.

Therefore, an object of the present invention is to provide an in-tank cleaning method capable of effectively injecting cleaning water into the tank to uniformly clean the inside of the tank regardless of the shape of the tank and the position of the nozzle. Especially.

[0007]

According to the method for cleaning a bath of the present invention, a tip portion of an insertion pipe portion, which is inserted into the bath and guides cleaning water, is provided with a rotary head that rotates around its axis to rotate around an inclined axis. A rotating nozzle is provided, and this nozzle has a washing water injection port which faces in one direction and the opposite direction along the axial direction of the insertion tube portion, and which faces a large cleaning area or a dirty area in the tank. Has a larger diameter than that of the other, and the nozzle and the rotary head are rotated while cleaning from the cleaning water jet into the tank regardless of the shape of the tank and the position of the nozzle. The feature is that water is effectively sprayed to clean the inside of the tank evenly. That is, while rotating the nozzle and the rotary head respectively, a larger amount of cleaning water is sprayed from the cleaning water injection port to a region with a large cleaning area or a region with a large amount of dirt in the tank, compared to a region with a small cleaning area or a region with a small amount of dirt. By doing so, the inside of the tank is cleaned evenly.

[0008]

According to the method of cleaning a bath of the present invention, the rotary head rotates about the axis of the insertion tube and the nozzle rotates about the tilt axis, so that the cleaning water is sprayed from the cleaning water injection port with the smaller diameter. An area with a small cleaning area or an area with little dirt in the tank is mainly washed with the washing water, and a large area with a large washing area or a lot of dirt with a large amount of washing water sprayed from the washing water injection port with the larger diameter. Since the area is mainly washed, even if it is a vertically long tank such as a beer brewing tank, without positioning the nozzle in the center of the tank,
Further, even if there are areas of different stains in the tank, it is possible to efficiently and evenly clean the inside of the tank.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a tank such as a beer brewing tank, and a cleaning device 2 for cleaning the inside of the tank 1 is installed at an approximately central portion of an upper portion of the tank 1. This cleaning device 2 has an insertion pipe portion 3 which is vertically inserted into the tank 1 and which guides the cleaning water w, and a rotary head which rotates around its vertical axis (arrow A) at the lower end portion of the insertion pipe portion 3. A nozzle 5 that rotates around the tilt axis (arrow B) is provided via 4.

A drive section 6 is provided at the upper end of the insertion tube section 3, and a rotary shaft 7 for transmitting rotation from the drive section 6 to the rotary head section 4 and the nozzle 5 is provided in the insertion tube section 3. It has been inserted. In addition, the insertion pipe portion 3 is divided into a plurality of portions to enable maintenance and change of length, and in the case of the embodiment, the cleaning water inlet port 8 is located outside the tank 1 and is connected to the cleaning water supply pipe 8. Is formed by connecting the L-shaped outer pipe portion 3a having the above, the middle pipe portion 3b and the end pipe portion 3c located in the tank 1 in series by a flange joint.

The flange 9 of the middle pipe portion 3b connected to the outer pipe portion 3a is formed large as a lid for covering the opening 10 provided in the upper portion of the tank 1, and is bolted to the upper portion of the tank 1.
Further, the rotary shaft 7 is also divided into a plurality of parts according to the joint position of the insertion pipe part 3, and in the case of the embodiment, as shown in FIG. 2 or 4, the outer shaft part 7a, the middle shaft part 7b and the end shaft part 7c. Are connected in series by a meshing joint. The upper end portion of the outer shaft portion 7a penetrates the upper end portion of the outer pipe portion 3a, and is rotatably supported via a bearing 12 in a bearing chamber 11 formed in the upper end portion of the outer pipe portion 3a. . The upper end of the middle shaft portion 7b is rotatably supported by the lower end portion of the outer pipe portion 3a via a cylindrical bearing 13, and the upper end portion of the end shaft portion 7c is located at the axial center of the end pipe portion 3c. It is rotatably supported on the upper end of a fixed cylindrical portion 14 that is fixed so as to pass through the portion 7c.

The bearing chamber 11 is provided with the drive unit 6 composed of a cylinder for driving the rotating shaft 7 by utilizing the pressure of the pressurized cleaning water w. The drive unit 6 is a second cylinder unit 16 that houses the first piston 15 and a second piston 17 that is in contact with the tip of the first piston 15 and that is larger than the first piston 15. 18 in series, and the first and second pistons 15 and 17 are provided in the first and second cylinder portions 16 and 18, respectively.
Coil springs 19 and 20 for returning the to the standby position (stroke end on the right side in FIG. 2) are provided, respectively.

A water supply port 22 for introducing cleaning water w from the outer pipe portion 3a through the water supply pipe 21 is formed at the end of the first cylinder portion 16, and the first piston 15 is thereby partitioned. A small hole 23 that communicates the front and rear chambers in the formed first cylinder portion 16 is formed. Second piston 17
A communication hole 24 that communicates the front and rear chambers in the second cylinder portion 18 partitioned by this is formed in this.
Is closed by the tip of the first piston 15. Further, the second cylinder portion 18 is formed with a drain port 25 for draining the wash water flowing out through the communication hole 24, and the drain port 25 is provided, for example, through the flange 9 of the middle pipe portion 3b. A drain pipe 26 for draining the wash water into the tank 1 is connected.

Therefore, when the cleaning water is introduced into the first cylinder portion 16 from the water supply port 22 of the drive unit 6, the cleaning water becomes the first cleaning water.
The second piston 17 and the first piston 1 are introduced by being introduced into the second cylinder portion 18 through the small hole 23 of the piston 15 and the gap between the first piston 15 and the first cylinder 16.
5 resists the spring pressure of the coil springs 20 and 19 and moves forward (see FIG. 2).
To the left) of (moving forward). Then, when the first piston 15 stops at the stroke end, the second piston 1
7 moves further forward due to the pressure of the washing water to move the first piston 1
5 is separated from the front end portion of the first piston 15, the pressure difference of the wash water acting on the front end portion and the rear end portion of the first piston 15 is reduced, so that the first piston 15 is at the standby position by the spring pressure of the coil spring 19 at the rear position ( Return movement (return) to the right in Fig. 2)
Then, the second piston 17 also releases the pressure of the washing water acting on the rear end portion of the first piston 15 through the communication hole 24 opened by the separation of the front end portion of the first piston 15, thereby causing the spring of the coil spring 20. Moves back with pressure.

In this way, the first and second pistons 1
The rotating shaft 7 is driven by the power of the drive unit 6 in which 5 and 17 reciprocate repeatedly.
A ratchet mechanism is used to rotate the.
That is, the outer shaft portion 7 of the rotating shaft 7 located in the bearing chamber 11
As shown in FIG. 3, a ratchet gear 27 is attached to a, and a rack portion 28 that meshes with the ratchet gear 27 is pivotally supported at the tip end portion of the second piston 17 to reciprocate the second piston 17. Thus, the rotating shaft 7 is intermittently driven to rotate via the rack portion 28 and the ratchet gear 27. It is needless to say that the ratchet mechanism has a spring (not shown) that presses the rack portion 28 against the ratchet gear 27 and a stopper claw (not shown) that prevents reverse rotation of the ratchet gear 27.

The upper end portion of the rotary shaft 7 (upper end portion of the outer shaft portion 7a) extends through the upper portion of the bearing chamber 11, and the upper portion of the bearing chamber 11 has the extended rotary shaft 7 A cover 29 that covers the tip is detachably attached. A rotation sensor (not shown) such as a rotary encoder may be provided at the upper end of the rotary shaft 7 to remotely detect the number of rotations of the rotary shaft 7 or manage it via a computer. When the drive unit 6 fails, a handle or an auxiliary power unit can be connected to the upper end of the rotary shaft 7 to rotate the rotary shaft 7.

On the other hand, the rotating head 4 is formed in a cylindrical shape with its upper end rotatably fitted to the outer periphery of the lower end of the insertion tube 3 (lower end of the end tube 3c), and the inside is partitioned into upper and lower parts. A partition wall 30 is formed, and an end plate 31 is attached to the lower end portion. The lower end portion of the rotary shaft 7 (the lower end portion of the end shaft portion 7c) penetrates through the partition wall 30 of the rotary head 4 together with the fixed cylinder portion 14, and the lower end portion of the rotary shaft 7 rotates the rotary head 4. Therefore, it is engaged with the end plate 31.

A receiving portion 32 having a conical upper end is fixed to the outer peripheral portion of the lower end of the fixed tubular portion 14, and a bevel gear 33 having a lower end engaging with the receiving portion 32 is fixed to the upper portion of the receiving portion 32. The bevel gear 33 is mounted in a loosely mounted state, and the lower surface of the partition wall 30 of the rotary head 4 is rotatably supported on the upper end of the bevel gear 33 via a bearing 34. As described above, the bevel gear 33 is placed on the receiving portion 32 because the bevel gear 33 is pressed and fixed by the receiving portion 32 by the pressure of the washing water during cleaning, but the insertion pipe portion 3 is placed in the tank 1. This is for avoiding damage to the nozzle 5 by freely rotating when the nozzle 5 hits an object during insertion or withdrawal.

A washing water outlet port 35 is formed on the side of the rotary head 4 above the partition wall 30 so as to project obliquely downward and is opened. The T-shaped nozzle 5 is provided on the outer periphery of the washing water outlet port 35. The base portion of the nozzle 5 is rotatably mounted, and a bevel gear 36 meshing with the bevel gear 33 is fixed to the outer periphery of the base portion of the nozzle 5. Therefore, when the rotary head 4 is rotated via the rotary shaft 7 during cleaning, the bevel gear 36 on the nozzle 5 side rolls on the bevel gear 33 in the fixed state, and the nozzle 5 moves to the cleaning water outlet 35. Rotate around the tilt axis.

The nozzle 5 has a washing water injection port 37 which is open in one direction along the axial direction of the insertion tube portion 3, that is, a downward direction in the vertical direction, and an opposite direction, that is, a washing water opening which is upward in the vertical direction. And a water injection hole 38, particularly the tank 1
A region with a large cleaning area, that is, a lower region in the present embodiment, has a diameter d1 of one cleaning water injection port 37 which is larger than a diameter d2 of the other cleaning water injection port 38 with the position of the nozzle 5 as a boundary. There is. Therefore, as shown in FIG. 1, when the nozzle 5 rotates about the tilt axis (arrow B), the two cleaning water injection ports 37 and 38 draw different trajectories,
The washing water is jetted from the washing water jet port 38 having a smaller diameter at an opening angle α facing upward, and a larger amount of washing water is jetted from the washing water jet port 37 having a larger diameter at an opening angle β facing downward. Along with the rotation of the rotary head 4, a larger amount of cleaning water is sprayed on the lower region having a large cleaning area than the upper region having a small cleaning area, and the entire tank 1 is cleaned. In addition,
The nozzle 5 is formed by screwing a nozzle member 41 having a large-diameter cleaning water injection port 37 at one end of a T-shaped nozzle body 40 and a nozzle member 42 having a small-diameter cleaning water injection port 38 at the other end. It is configured so that various nozzle members having different diameters can be replaced depending on the size of the tank 1 and the state of dirt.

When the inside of the tank 1 is cleaned by the cleaning device 2 configured as described above, the insertion pipe part 3 is inserted from the opening 10 into the upper part of the tank 1 whose inside is emptied in advance. 2 may be installed, and cleaning water may be supplied by connecting a cleaning water supply pipe to the cleaning water inlet 8. The second piston 17 of the drive unit 6 is supplied by supplying a part of the wash water to the drive unit 6.
Reciprocate to intermittently rotate the rotary shaft 7 via the ratchet mechanism, the rotary head 4 rotates about the vertical axis via the rotary shaft 7, and the bevel gear accompanying the rotation of the rotary head 4 is rotated. Three
The nozzle 5 is rotated around the tilt axis by the action of 3, 36.

On the other hand, the washing water is used as the insertion tube portion 3 and the rotary head 4.
Is supplied to the nozzle 5 through the cleaning water, is sprayed from the cleaning water spray ports 37 and 38 of the rotating nozzle 5 as described above, and is sprayed from the cleaning water spray port 38 of the smaller diameter in the tank 1. The upper area with a small washing area is mainly washed,
A large amount of cleaning water sprayed from the cleaning water spray port 37 having a larger diameter mainly cleans the lower region having a large cleaning area. As described above, since the cleaning water is distributed to the regions having different cleaning areas generated by the nozzles 5 in the tank 1 as boundaries, the cleaning water is effectively cleaned, so that, for example, a vertically long tank such as a beer brewing tank. Even in such a case, the interior of the tank 1 can be efficiently cleaned without arranging the nozzle 5 at the center of the tank 1.

Further, since the rotary head 4 and the nozzle 5 are rotated by the drive unit 6 composed of a cylinder which utilizes the pressure of the cleaning water, unlike the turbine type which utilizes the flow of the cleaning water, the nozzle is used. Wash water injection port 37, 3
Even if the diameter of 8 is changed, the number of rotations of the rotary head 4 and the nozzle 5 can be kept constant.

Although the cleaning device 2 is installed on the upper part of the tank 1 in the above embodiment, the cleaning device 2 may be installed on the bottom part of the tank 1 or on the side of the tank 1. It may be installed in the section.
Further, as the drive unit 6 of the cleaning device 2, various types can be applied as long as the rotary shaft 7 is rotated by using the pressure of the cleaning water, and the rotary shaft 7 is not intermittent but continuous. It may be rotated. Furthermore, in the above-described embodiment, both the insertion tube portion 3 and the rotary shaft 7 are divided into a plurality of pieces, but these may not necessarily be divided.

In the above embodiment, the case where the nozzle 5 is arranged at a position apart from the center of the tank 1 has been described. However, the case where the nozzle 5 is arranged at the center of the tank 1 is described. However, the present invention is applicable. In this case, the nozzle 5
The upper and lower cleaning areas in the tank 1 at the boundary are almost equal, but in terms of dirt, the lower area is generally more dirty than the upper area. By setting the diameter of the cleaning water injection port 37 larger than that of the other cleaning water injection port 38, it is possible to cleanly and efficiently clean the interior of the tank 1 efficiently. Furthermore, the method of cleaning the tank of the present invention, in addition to cleaning the beer brewing tank,
It can also be applied to cleaning various tanks such as chemical tanks.

[0027]

In summary, according to the present invention, the nozzle which rotates around the tilt axis is provided at the tip of the insertion pipe portion which is inserted into the tank and which guides the cleaning water, through the rotary head which rotates around the axis. The nozzle has a cleaning water injection port facing in one direction and the opposite direction along the axial direction of the insertion pipe portion, and one cleaning water injection port facing a large cleaning area or a dirty region in the tank. Is formed to have a larger diameter than the other, and the cleaning area is small in the area where the cleaning area is large or where there is much dirt in the tank from the cleaning water injection port while rotating the nozzle and the rotating head respectively. The nozzle is located in the center of the tank even if it is a vertically long tank, such as a beer brewing tank, because a large amount of cleaning water is sprayed more effectively than in an area or an area with little dirt. Without letting Further it is also possible to clean the tank evenly efficiently if there is dirt different areas in the tank.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a cleaning device used in the in-tank cleaning method of the present invention.

FIG. 2 is an enlarged cross-sectional view showing details of a drive unit of the cleaning apparatus in FIG.

FIG. 3 is a plan view showing a ratchet mechanism section of the drive section in FIG.

FIG. 4 is an enlarged cross-sectional view showing details of a nozzle portion of the cleaning device in FIG.

FIG. 5 is a diagram schematically illustrating a conventional in-tank cleaning method.

[Explanation of symbols]

 1 Tank 3 Insertion Pipe 4 Rotating Head 5 Nozzles 37, 38 Cleaning Water Jet

Claims (1)

[Claims] 1. A nozzle 5 which rotates around an inclined axis is provided at a tip end portion of an insertion pipe portion 3 which is inserted into a tank 1 and which introduces cleaning water w, through a rotary head 4 which rotates around its axis. 5
Has wash water injection ports 37, 38 facing in one direction and the opposite direction along the axial direction of the insertion pipe portion 3, and one wash water facing a region with a large washing area or a lot of dirt in the tank 1. The injection port 37 or 38 is formed to have a larger diameter than that of the other port, and the nozzle 5 and the rotary head 4 are rotated, respectively, and the cleaning water injection port 37, 38 is used to rotate the nozzle 5 and the rotary head 4, respectively.
A method for cleaning an inside of a tank, characterized in that cleaning water is effectively sprayed into the inside of the tank 1 regardless of the shape of the tank 1 and the position of the nozzle 5 to wash the inside of the tank 1 evenly.