JP2618616B2 - Internal cleaning equipment for tanks, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning the inside of a container with water sprayed from a nozzle.

[0002]

2. Description of the Related Art For example, cement mixers and containers,
When cleaning the inside of the tank, such as the hold, the worker operates the hose drawn into the tank from outside, or in a large tank, the worker enters the tank and sprays water to clean it. The working environment was poor and the working efficiency was low. In addition, a nozzle is installed at the tip of the beam inserted into the tank, and the nozzle is rotated by using the reaction force of water sprayed from the nozzle to clean the nozzle. It is a simple one that repeats injection, and since the rotation reduces the injection power, a sufficient cleaning effect could not be expected.

According to Japanese Patent Publication No. Hei 6-94128, the applicant has described a nozzle support arm that rotates coaxially with the beam at the tip of the beam, and a rotatable nozzle that projects laterally from the nozzle support arm. It has a mounting seat and a straight-injection type nozzle mounted on the outer peripheral surface of the nozzle mounting seat in a direction crossing the axis of the nozzle mounting seat, and the nozzle mounting seat rotates or reciprocates at a different cycle from the rotation of the nozzle support arm. An apparatus for effectively cleaning the inside of the tank by rotating the tank is provided.

[0004]

SUMMARY OF THE INVENTION
According to the device of No. 94128, the entire surface in the tank can be effectively and automatically cleaned. However, a plurality of nozzles are fixed to the outer peripheral surface of the nozzle mounting seat protruding at right angles to the axis on both sides of the nozzle support arm, respectively, and are fixed to the equiangular position at right angles to each other. Cleaning is performed by rotating or rotating at a different cycle from the support arm, but according to the results of actual cleaning and examination,
The cleaning time until the entire surface was completely cleaned was longer than expected, and overcleaning occurred partially, and it was found that there was a problem that cleaning time and cleaning water were wasted as well as cleaning unevenness. According to the present invention, the cause of uneven cleaning in such an apparatus is investigated, the cleaning time is shortened, and the entire surface is uniformly cleaned.

[0005]

To this end, a nozzle support arm that rotates about the axial direction of the beam is provided at the tip of the beam slidably supported by the support, and a nozzle is provided with the nozzle support arm interposed therebetween. A nozzle mounting seat that is rotatably mounted on an axis that intersects with the axis of the support arm and that rotates or reciprocates at a different cycle from the rotation of the nozzle support arm is provided. In order to adjust the injection direction of a plurality of mounted straight injection type nozzles, the nozzles mounted on the nozzle mounting seat are provided at equal angular positions, and the injection direction of each nozzle includes the axis of the nozzle support arm. The plane perpendicular to the rotation axis of the nozzle mounting seat is inclined toward the position where it comes into contact with the cleaning surface.

[0006] As another means, a plurality of linearly-injection-type jetting nozzles are provided on an outer peripheral surface of a nozzle mounting seat rotatably mounted on the nozzle support arm in a direction perpendicular to an axis of the nozzle mounting seat. With nozzles, these nozzles are attached to the respective nozzle mounting seats at equal angular positions, and the nozzle positions of the nozzle mounting seats are changed from the nozzle mounting angle equidistant position to the cleaning position trajectory of one nozzle. Is arranged at a position deviated by an angle shifted according to the interval of.

[0007]

Therefore, the displacement of the injection position of the nozzles between the nozzle mounting seats due to the distance from the axis of the nozzle support arm to the nozzle position is eliminated, cleaning unevenness is eliminated, and the nozzle position is set between the nozzle support arm and the nozzle mounting position. During one cycle until the seat returns to its original position by rotation of the seat, the jetting position of each nozzle moves at equal intervals over the entire surface of the cleaning surface, thereby eliminating cleaning unevenness and shortening the cleaning time.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Numeral 1 denotes a beam, which is slidably held on a column 2 as shown in FIG. 3, for example, and inserted into a tank 5 to be cleaned by a motor 4 by a chain 3 along the beam. A water pipe 6 is provided inside the beam 1, and the water pipe 6 is rotated by a motor 7 via a gear 8. 9 is a hose for supplying pressurized water to the water pipe 6.

Reference numeral 11 denotes a rotary box provided at the tip of the beam 1, which in this embodiment is connected to the water pipe 6 and rotates together with the water pipe. Reference numeral 12 denotes a nozzle support arm which is coaxial with the water pipe and protrudes in the axial direction of the beam from the rotating box.
Reference numerals 3 and 14 denote nozzle mounting seats which are perpendicularly intersecting the axis of the nozzle support arm on both sides of the nozzle support arm 12 and are rotatably mounted. Four nozzle mounting seats are provided on the outer peripheral surface of the nozzle mounting seat. Straight-injection type nozzles 15a, 15
b, 15c, 15d and 16a, 16b, 16b, 16
d (15d, 16c and 16d are not shown in FIG. 1). Each nozzle uses a universal nozzle whose injection direction can be adjusted in the axial direction of the nozzle mounting seat, and the mounting position of the nozzle is separated from the axis C of the nozzle support arm 12 by an interval L. The nozzles of the nozzle mounting seats 13 and 14 on both sides are positioned at equal angular positions on the respective nozzle mounting seats, that is, as shown in FIG.
In the case of the individual, it is attached at a position of 90 °, so that the nozzles of the nozzle attachment seats are located at equal positions of the attachment angle,
In the case of four, they are arranged with an angle difference of 45 °.

Reference numeral 17 denotes an internal gear fixed to the beam 1, and reference numeral 18 denotes a drive shaft provided in the rotating box 11 in parallel with the beam 1, and a spur gear 19 meshes with the internal gear 17. Reference numeral 21 denotes the drive shaft 18 in the rotating box 11.
, And meshes with a helical gear 23 attached to the operation shaft 22. Reference numerals 24 and 25 denote main driving gears provided at both ends of the operation shaft 22, which mesh with driven gears 26 and 27 of the nozzle mounting seats 13 and 14, respectively.
Reference numeral 28 denotes a water supply passage in the nozzle support arm, which is connected to the water guide pipe 6 via a water supply passage 29 in the rotating box. The number of teeth of the internal gear 17 and the number of teeth of the spur gear 19 are set to a non-integral multiple of the number of teeth, and the nozzle support arm 12 and the nozzle mounting seat 1
The rotation of 3, 14 is not synchronized.

When performing cleaning, the tip of the beam 1 is inserted into the tank 5 to be cleaned, the insertion hole is appropriately closed with a sheet or the like, pressure water is supplied from the hose 9 to the water guide pipe 6,
9 and the water is supplied from each nozzle through the water supply passage 28.
When the water guide pipe 6 in the beam 1 is rotated by the motor 7 via the gear 8, the nozzle support arm 12 rotates together with the rotating box 11, and the entire nozzle is moved to the nozzle support arm 12.
Is rotated about the axis C. With this rotation, the spur gear 19 of the drive shaft 18 rotates along the internal gear 17 of the arm to rotate the drive shaft 18, and the drive gear 21 drives the operation shaft 22 via the helical gear 23. Therefore, the driving gears 24 and 25 rotate the nozzle mounting seats 13 and 14 together with the nozzles via the driven gears 26 and 27.

The rotation of the nozzles is performed when the nozzles are mounted in a direction perpendicular to the axis of the nozzle mounting seats 13 and 14, and the ejection direction is parallel to the axis C of the nozzle support arm 12. 4, the nozzles 15a, 15b, 15c, and 15d rotate in the direction of arrow a around the axis A of the nozzle mounting seat 13 as shown in FIG. 4, and the nozzles 16a, 16b, The injection positions of 16b and 16d rotate in the same b direction with a rotation angle of 45 ° about the axis B of the nozzle mounting seat 14 and rotate in the same direction b, and the nozzles on both sides center on the axis C of the nozzle support arm 12. The nozzle rotates in the direction of arrow d while maintaining the interval 2L between the nozzles.

Therefore, when the cleaning surface of the cylinder facing the axis C is cleaned from the state shown in FIG. 4, the cleaning distance is 1 m, the number of rotations of the nozzle support arm is 5 rpm, and the distance between the nozzle support arm and the nozzle mounting seat is 5 mm. FIG. 5 shows a characteristic diagram (Lissajous) showing the trajectory of the injection position of each nozzle after 6 seconds when the rotation ratio is 1: 3.1 and the cleaning time of 100% of the cleaning effect requires 156 seconds. As described above, the injection position of the nozzle 15a of the nozzle mounting seat 13 is shifted from the axial position O of the nozzle support arm by a distance L between the nozzle positions in the X-axis direction (the circumferential direction of the cylinder). The cleaning surface is moved along the curve 15a according to the rotation speed and the rotation speed of the nozzle support arm 12. The nozzle 16a of the other nozzle mounting seat 14 moves along a curve 16a from a position deviated by an interval L from the axis position O to the opposite side to the nozzle 15a. For this reason, the curve 15a and the curve 16a approach each other at an interval of 2L and almost overlap each other. In other words, the nozzle 15b and the nozzle 16b, the nozzle 15c and the nozzle 16c, and the nozzle 15d1 and the nozzle 6d are similarly cleaned at positions almost close to each other. Therefore, the trajectory of the cleaning position is deviated to cause cleaning unevenness, the interval between the cleaning positions of the nozzles is greatly widened, the required number of revolutions of the nozzle support arm 12 is increased to fill this portion, and until the uniform cleaning is obtained. The cleaning time is prolonged, and the portion close to the cleaning position is over-cleaned.

In order to solve such a point, the present invention provides:
Each nozzle 15a, 15 attached to the nozzle attachment seat 13
b, 15c, 15d and nozzle 1 of nozzle mounting seat 14
The injection directions of 6a, 16b, 16c, and 16d include the nozzle mounting seat 1 including the axis C of the nozzle support arm 12, respectively.
The planes perpendicular to the rotation axes of 3 and 14 are inclined toward the position where they come into contact with the cleaning surface. Therefore, as shown in FIG.
The ejection positions of 15b, 15c, and 15d are set in such a manner that the ejection direction is corrected according to the inclination L according to the interval L from the nozzle support arm 12, and the nozzle mounting seat 13 is corrected in a state where the bias on the cleaning surface is corrected.
The nozzle 16 rotates in the direction of arrow a about the axis A of
The jetting positions of a, 16b, 16b, and 16d are corrected for the deviation in the cleaning surface in the opposite direction, and are delayed by 45 ° from the nozzle of the nozzle mounting seat 13 with respect to the axis B of the nozzle mounting seat 14 by a rotation angle of 45 °. , And the nozzles on both sides are rotated around the axis C of the nozzle support arm 12 as indicated by an arrow d.
Rotate in the direction of.

For this reason, as shown in FIG. 7, the trajectory of the injection position of each nozzle on the cleaning surface is such that the injection position of the nozzle 15a is cleaned from the axial position O along the curve 15a, and the nozzle 16a is not biased. Wash away locations at 45 ° intervals. The nozzle 15b is further cleaned along a curve delayed by 45 °, and the other nozzles are also cleaned at equal intervals without mutual deviation. Therefore, the nozzle support arm 1
With the rotation of the nozzle mounting seats 13 and 14, each nozzle performs cleaning at an interval equivalent to 45 ° with respect to each other, and the next rotation of the nozzle mounting seat sequentially fills the space between the trajectories to wash the cleaning surface evenly. As a result, overcleaning can be eliminated, and the entire surface can be cleaned in a short time.

In the embodiment shown in the drawings, the nozzle mounting seats are provided on both sides of the nozzle support arm, and four nozzles are mounted on each of the nozzle mounting seats. However, the present invention is not limited to this. They can be selected and attached at an equal angle to each other. Further, in the embodiment shown in the figure, the drive shaft 18 is driven to be reduced by the spur gear 19 meshed with the internal gear 17, but instead of the internal gear, an external gear fixed to the beam 1 surrounding the water pipe 6 is used. The spur gear 19 may be provided so as to mesh with the outer periphery of the external gear. In actual cleaning, the distance between the cleaning surface for setting the angle θ between the axis of the nozzle mounting seat and the jetting direction of the nozzle may change depending on the rotational position of the nozzle. If it is set, or if it is set to the largest cleaning distance, it is possible to obtain an effect that is practically acceptable.

[0017] Further, an adjusting device provided with a driving device constituted by a crank device or a gear for changing the injection angle of the nozzle is provided in the nozzle mounting seat. Attach a small distance measuring device such as ultrasonic wave to detect the distance to the cleaning surface,
This detection value is set as a perpendicular line, tan θ with the interval L as the base is calculated, the adjusting device is driven, and the angle of the nozzle is adjusted, whereby automation can be performed. With measuring instrument and adjusting device,
If the injection angle is adjusted individually according to a change in the distance from the cleaning surface in the nozzle direction, more efficient cleaning can be performed.

FIG. 8 shows another embodiment, in which the same parts as those in FIG. 1 are denoted by the same reference numerals, 12 is a nozzle supporting arm, and 13 and 14 are rotatable to both sides with the nozzle supporting arm interposed therebetween. The operating shaft 22 is rotated by driven gears 24 and 25 via driven gears 26 and 27 at a nozzle mounting seat attached to the operating shaft 22. Numeral 31 denotes a nozzle mounting piece of the nozzle mounting seat 13, the nozzles 15 a, 15 b, 15 c and a not-shown nozzle 15 d on the outer periphery thereof are arranged at equal angular positions, and the jetting direction of each nozzle is set at the axis of the nozzle mounting seat. And at right angles. Reference numeral 32 denotes a nozzle mounting piece of the nozzle mounting seat 14, which is rotatably held by the nozzle mounting seat 14, and has nozzles 16a, 16b and nozzles 16c, 16d (not shown) arranged at equal angular positions on the outer peripheral surface thereof. The injection direction is perpendicular to the axis of the nozzle mounting seat. Reference numeral 33 denotes a gear attached to the nozzle attachment piece 32, which meshes with a pinion 35 driven by a motor 34 provided on the nozzle attachment seat 14.

The nozzles 16a, 16 of the nozzle mounting seat 14
b, 16c and 16d are the nozzles 15 of the nozzle mounting seat 13.
a, 15b, 15c, and 15d are arranged at 90 ° angular positions, but the nozzles of the nozzle mounting seats 13 and 14 are positioned at equal positions of the nozzle mounting angle of 90 ° as shown in FIG. 2L distance between nozzles from 45 ° position
Is shifted by an angle α for shifting the trajectory of the washing position. Therefore, the trajectory of the injection position of the nozzle is
As shown in FIG. 9, the nozzle 15a moves by a curve 15a shown by a solid line from a position deviated by an interval L from the axial center position O of the nozzle support arm, and the nozzle 16a moves further by α ° from a position 45 ° delayed by a dotted line. Curve 16 indicated by the dashed dotted line
Move with a. For this reason, the nozzle interval 2L from the equal position
And the trajectory of the jetting position of the nozzle 16a is located between the trajectory of the nozzle 15a and the intermediate point between the delay nozzle 15a and the nozzle 15b, so that uniform cleaning can be performed. Cleaning unevenness can be eliminated.

FIG. 10 shows the nozzle mounting seats 13 and 14 by the driving gear and the driven gear in the embodiment shown in FIGS.
1 is a side view showing an example in which the rotation is changed to a reciprocating rotation by a crank, and the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and nozzles 16a, 16b, 16c, and 16d are nozzles 15a. , 15b, 15c, and 15d. 41 and 42 are crank arms fixed to both ends of the operating shaft 22, 43 and 44 are nozzle mounting seats 13,
14 are crank rods connecting the crank arms 41, 42 of the operating shaft and the crank arms 43, 44 of the nozzle mounting seat, respectively.
The nozzle mounting seats 13 and 14 are reciprocated at a rotation angle of 90 ° via the nozzles 3 and 44. In such an apparatus as well, the influence of the distance L from the axis C of the nozzle support arm to the nozzle position occurs, and in order to eliminate this influence, the jetting direction of each nozzle is changed by the nozzle mounting seat including the axis of the nozzle support arm. Is tilted toward a position where a plane perpendicular to the axis of rotation contacts the cleaning surface.

As an example, the nozzles 15a, 15b, 15
c, 15d and 16a, 16b, 16b, 16d are arranged as shown in FIG. 11, the injection directions are provided in parallel, the nozzle mounting seats 13, 14 are cranked, and the nozzle support shaft is d.
In the direction a, and the nozzle 15a
The nozzle 16a is turned by 90 ° in the direction b. When it is turned 90 °, it reciprocates in the opposite direction. For this reason, when the cleaning surface of the cylinder facing the axis C of the nozzle supporting shaft arm is cleaned from the state shown in FIG. 11, the cleaning distance is 1 m, the driving rotation speed of the nozzle supporting arm is 5
rpm, the rotation ratio of the nozzle support arm and the nozzle mounting seat is 1:
6.1. Assuming that a cleaning time of 100% cleaning effect requires 156 seconds, a characteristic diagram (Lissajous) showing the locus of the injection position of each nozzle after 6 seconds is shown in FIG. The cleaning position due to the injection is biased, and cleaning unevenness occurs. On the other hand, by changing the ejection direction of the nozzle as shown in FIG. 13, the trajectory of the cleaning surface is equalized as shown in FIG. 14, and the cleaning can be performed without unevenness.

[0022]

As described above, according to the present invention, the tip of the beam slidably supported by the column is provided with a nozzle support arm rotating about the axis in the same direction as the beam, and an equal angle with the nozzle support arm interposed therebetween. A nozzle mounting seat rotatably mounted at a position, the injection direction of a plurality of linear injection nozzles radially mounted at equal angular positions on the outer peripheral surface of each nozzle mounting seat, the axis of the nozzle support arm. By inclining the plane perpendicular to the rotation axis of the nozzle mounting seat, including the core, toward the position where the nozzle mounting seat comes into contact with the cleaning surface, the displacement of the injection position due to the interval between the nozzle mounting positions of the nozzle mounting seats is eliminated, and each nozzle Prevents overlapping and uneven spacing of mutual cleaning positions, eliminates partial over-cleaning, cleans the entire clean surface evenly in a short time, and reduces the cleaning time until the entire surface is completely cleaned Let It can eliminate the waste of the washing water due to partial over-washed to eliminate the uneven cleaning.

Note that effective cleaning can be performed even if the nozzle angle adjustment is set by the average distance to the cleaning surface. In addition, an adjustment device that changes the angle of inclination of the nozzle and a distance measuring device that measures the distance from the nozzle position to the cleaning surface are provided, and if the angle of inclination of the nozzle is automatically adjusted based on the detected value, automation is possible. And the washing efficiency can be further improved.

Further, the nozzles are mounted on the respective nozzle mounting seats at equal angular positions with the jetting direction perpendicular to the axis of the nozzle mounting seat, and the nozzle positions of the nozzle mounting seats are set at the center where the nozzle mounting angle is equally divided. By deviating the trajectory of the cleaning position from the position by the angle that shifts the trajectory of the cleaning position in accordance with the interval between the nozzles, the nozzle can be ejected in the direction perpendicular to the axis of the nozzle mounting seat, and This eliminates overlap and bias in the cleaning positions of the nozzles due to the distance between the nozzles, enables uniform cleaning in a short time, and eliminates the need to adjust the jet direction of the nozzles, thereby simplifying the nozzle structure and using inexpensive nozzles. The effect that can be obtained is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment when a nozzle is rotated in the present invention, and a part is shown in a cross section.

FIG. 2 is a left side view of FIG.

FIG. 3 is a side sectional view showing an example of a use state.

FIG. 4 is an explanatory view showing the movement of the nozzle when the nozzle mounting direction is not tilted when rotating the nozzle mounting seat.

FIG. 5 is a characteristic diagram showing a trajectory of an injection position due to the movement of the nozzle in FIG. 4;

FIG. 6 is an explanatory view showing the movement of the nozzle of the present invention in which the nozzle of FIG. 4 is inclined.

FIG. 7 is a characteristic diagram showing a trajectory of an injection position due to the movement of the nozzle in FIG. 6;

FIG. 8 is a plan view, partially in section, showing another embodiment.

9 is a characteristic diagram showing a trajectory of an injection position due to the movement of the nozzle in FIG.

FIG. 10 is a plan view showing an embodiment when the nozzle is rotated in the present invention, and a part is shown in a cross section.

FIG. 11 is an explanatory view showing the movement of the nozzle when the nozzle mounting direction is not inclined when the nozzle mounting seat is rotated.

12 is a characteristic diagram showing a trajectory of an injection position due to the movement of the nozzle in FIG.

FIG. 13 is an explanatory diagram showing the movement of the nozzle of the present invention in which the nozzle of FIG. 10 is inclined.

14 is a characteristic diagram showing a trajectory of an injection position due to the movement of the nozzle in FIG.

[Explanation of symbols]

 Reference Signs List 1 beam 2 support 3 chain 4 motor 5 tank to be washed 6 water guide pipe 7 motor 8 gear 9 hose 11 rotating box 12 nozzle support arm 13, 14 nozzle mounting seat 15a, 15b, 15c, 15d nozzle 16a, 16b, 16b, 16d nozzle 17 Internal gear 18 Drive shaft 19 Spur gear 21 Drive gear 22 Operating shaft 23 Helical gear 24, 25 Main drive gear 26, 27 Follower gear 28 Water supply channel 29 Water supply channel 31, 32 Nozzle mounting piece 33 Gear 34 Motor 35 Pinion 41, 42, 43, 44 Crank arm 45, 46 Crank rod

Claims (4)

(57) [Claims] A beam slidably supported by a column;
A nozzle support arm attached to the tip of this beam and rotating at an axis in the same direction as the axis of the beam, and arranged at an equal angle with the nozzle support arm interposed therebetween, with an axis intersecting the axis of the nozzle support arm A nozzle mounting seat rotatably mounted, and a plurality of linear injection nozzles radially mounted on the outer peripheral surface of each of the nozzle mounting seats and capable of adjusting the injection direction, wherein each of the nozzles has a nozzle mounting seat. Attached to the seat at equal angular positions, the nozzle positions of each nozzle mounting seat are arranged at equal positions of the nozzle mounting angle, and the ejection direction of each nozzle is adjusted to the nozzle mounting seat including the axis of the nozzle support arm. A plane perpendicular to the rotation axis is inclined toward a position where the plane is in contact with the cleaning surface, and pressurized water is supplied to the nozzle to rotate the nozzle support arm and to attach the nozzle mounting seat. Internal cleaning apparatus such as a tank, characterized in that rotating or reciprocating rotation at different periods of the rotation of the nozzle support arm. 2. An average distance from the axis of the nozzle mounting seat to the cleaning surface is detected, and a distance from the axis of the nozzle support arm to the nozzle is defined as a base and the average distance is defined as a vertical line.
The internal cleaning apparatus for a tank or the like according to claim 1, wherein the inclination angle of the nozzle is adjusted by nθ. 3. A distance measuring device for measuring a distance from an axis of the nozzle mounting seat to a cleaning surface, wherein a distance from an axis of the nozzle support arm to the nozzle is a base, and a detection value of the distance measuring device is 2. The internal cleaning device for a tank or the like according to claim 1, wherein the inclination angle of the nozzle is adjusted by tan θ as a perpendicular line. 4. A beam slidably supported on a column,
A nozzle support arm attached to the tip of this beam and rotating around the axis in the same direction as the beam axis, and rotatable at an equiangular position across this nozzle support arm around an axis perpendicular to the axis of the nozzle support arm A nozzle mounting seat attached to a plurality of linear injection nozzles that are radially mounted on the outer peripheral surface of each of the nozzle mounting seats and spray in a direction perpendicular to the axis of the nozzle mounting seat, The nozzles are mounted at equal angular positions on the outer peripheral surface of the respective nozzle mounting seats, and the nozzle positions of the respective nozzle mounting seats are set at equal positions of the nozzle mounting angle. It is arranged at a position deviated by an angle that is shifted by the interval, supplies pressure water to the nozzle, rotates the nozzle support arm, and moves the nozzle mounting seat to a different circumference. In rotating or internal cleaning apparatus such as a tank, characterized in that reciprocally rotate.