Spray rotor

Abstract

To provide a spray rotor that is able to uniformly wash the inside of a tank and that can be easily attached to any tank.SOLUTION: A spray rotator disposed in a tank and used for washing inside of the tank, includes a plurality of washing jet holes formed in a rotating rotator body. Some or all of the plurality of washing jet holes have different jet angles in an elevation angle direction. Further, in a plan around a rotation axis, washing jet holes are made through side walls of the rotor body at a predetermined angle in a rotating direction with respect to a straight line perpendicular to the rotation axis. When washing is performed while the spray rotor is rotated, a plurality of long streams of water jetted through the respective washing jet holes are sprayed in the elevation angle direction of an upper hemisphere in the tank.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a spray rotor for tank cleaning, which cleans the inner wall surface of a tank. [Background technology]

[0002] Traditionally, in the food and pharmaceutical industries, tanks such as sanitary tanks have been used for various purposes such as product storage, mixing, sterilization, etc. Since the inside of these tanks needs to be kept clean, spray rotors are used as dedicated cleaning devices.

[0003] Specifically, as shown in Fig. 12, the spray rotor is inserted into the tank 102 through a nozzle 102b formed on an upper lid 102a of the tank 102. For example, as shown in Fig. 13, the spray rotor 104 includes an upper rotor 106 and a lower rotor 108 which rotate in opposite directions. Each of the upper rotor 106 and the lower rotor 108 is provided with two rotation injection holes 110 and two cleaning injection holes 112. The rotation injection holes 110 are injection holes that inject cleaning liquid in a tangential direction to rotate the upper rotor 106 or the lower rotor 108, and the cleaning injection holes 112 are injection holes that inject cleaning liquid.

[0004] This spray rotor 104 makes it possible to clean the inside of the tank 102 without taking up much space. However, the above-mentioned spray rotor 104 had a problem that, although the areas in the tank 102 that were hit by the water plume jetted from the cleaning jet holes 112 were cleaned, the areas that were not hit by the water plume were not cleaned directly. For this reason, cleaning of the areas not hit by the water plume had to be left to the flow of cleaning liquid that flows down from the areas where the water plume hits.

[0005] In addition, since there are only four cleaning injection holes 112 in total, there are few places that can be cleaned with the water column, and uneven cleaning is noticeable. In particular, there is a problem that it is difficult to clean the inside of the nozzle 102c.

[0006] In order to solve such problems, a spray rotor has been developed in which a first group of injection holes and a second group of injection holes with different injection angles are formed adjacent to each other on the upper and lower rotors (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2020-157214 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, the spray rotor 114 (hereinafter referred to as the conventional product) described in Patent Document 1 shown in FIG. 14 exhibits high cleaning performance at a spray angle of approximately 15° to 45° when cleaning is performed, but at other spray angles, particularly at lower spray angles (see reference numeral 136 in FIG. 14), cleaning still relies on the flow of water.

[0009] Particularly in large cleaning tanks, the nozzles are often located in areas where the jet of water is unlikely to hit directly, which can result in areas not being cleaned properly. When such residual cleaning occurs, a large amount of cleaning liquid is required to prevent residual cleaning by performing cleaning for a long period of time, but there is a need to conserve cleaning liquid.

[0010] An object of the present invention is to provide a spray rotor capable of uniformly cleaning the inside of a tank in a short time and saving cleaning liquid. [Means for solving the problem]

[0011] The spray rotor of the present invention is A spray rotor disposed in a tank for cleaning the inside of the tank, A plurality of cleaning injection holes are formed in a rotating rotor body, Some or all of the plurality of cleaning jet holes have different jet angles in an elevation angle direction, The cleaning injection holes are drilled in the side wall of the rotor body at a predetermined angle in the rotation direction with respect to a straight line perpendicular to the rotation axis in a plane centered on the rotation axis, When cleaning is performed while rotating the spray rotor, a plurality of water columns are sprayed from each cleaning nozzle in the direction of the elevation angle of the northern hemisphere within the tank.

[0012] In this way, by making the cleaning jet holes have different jetting angles in the elevation direction, the inside of the tank can be cleaned evenly in a short time and cleaning liquid can be saved.

[0013] The spray rotor of the present invention is The cleaning injection hole has: A plurality of high-angle injection holes for injecting a water column into a high-angle region; A plurality of mid-angle injection holes for injecting a water column into a mid-angle region; Multiple low-angle injection holes for injecting water columns into low-angle areas; Includes: Based on the equator perpendicular to the rotation axis of the rotor body, The angle of the water column injected from the high-angle injection hole is greater than 60° and less than 85°, The angle of the water column ejected from the medium angle injection hole is greater than 30° and less than 60°, The angle of the water column ejected from the low-angle injection hole is between 0° and 30°.

[0014] In this way, by forming high-angle injection holes, medium-angle injection holes, and low-angle injection holes in the rotor body, it is possible to clean the inner wall surface of the tank over a wide area, which allows the inside of the tank to be cleaned evenly in a short time and saves on cleaning fluid.

[0015] The spray rotor of the present invention is a plurality of injection hole regions are arranged on a side wall of the rotor body, the injection hole regions having injection hole groups formed in a row in a direction perpendicular to a rotation direction of the rotor body; The injection hole area includes: a high-angle injection hole area for injecting a water column into a high-angle area; a medium angle injection hole area for injecting a water column into a medium angle area; A low-angle injection hole area for injecting a water column into a low-angle area. Includes: The angle of the water column injected from each injection hole group included in each of the injection hole regions is different.

[0016] In this way, by forming high-angle injection hole areas, medium-angle injection hole areas, and low-angle injection hole areas on the rotor body, it is possible to clean the inner wall surface of the tank over a wide area, which allows the inside of the tank to be cleaned evenly in a short time and saves on cleaning fluid.

[0017] The spray rotor of the present invention is the high-angle injection hole region includes a high-angle injection hole group configured from a plurality of the cleaning injection holes, the angle between the water column jetted from the cleaning jet hole on the most equatorial side of the high-angle injection hole group and the equator is in the range of 50° or more, and the angle between the water column jetted from the cleaning jet hole on the most polar side of the high-angle injection hole group and the equator is in the range of 85° or less, the medium-angle injection hole region includes a medium-angle injection hole group configured from a plurality of the cleaning injection holes, an angle between the water column jetted from the cleaning jet hole on the most equatorial side of the medium-angle injection hole group and the equator is in a range of 10° or more, and an angle between the water column jetted from the cleaning jet hole on the most polar side of the medium-angle injection hole group and the equator is in a range of 55° or less, the low-angle injection hole region includes a low-angle injection hole group composed of a plurality of cleaning injection holes, The angle between the low-angle water column sprayed from the cleaning jet hole on the equatorial side of the low-angle injection hole group and the equator is in the range of 0° or more, and the angle between the water column sprayed from the cleaning jet hole on the polar side of the low-angle injection hole group and the equator is in the range of 30° or less.

[0018] In this way, by setting the range of angles formed by the water columns sprayed from the cleaning nozzles, it is possible to accurately form a high-angle nozzle area, a medium-angle nozzle area, and a low-angle nozzle area.

[0019] The spray rotor of the present invention is Each of the injection hole groups includes 2 to 10 of the cleaning injection holes.

[0020] That is, by including the above-mentioned number of cleaning jet holes in each jet hole group, the tank inner wall surface can be cleaned over a wide area.

[0021] The spray rotor of the present invention is The rotor body includes an upper rotor having high-angle injection holes, medium-angle injection holes, and low-angle injection holes, or a region of high-angle injection holes, medium-angle injection holes, and low-angle injection holes, and a lower rotor that rotates in forward and reverse directions with the upper rotor, and the upper rotor and the lower rotor are configured to be spherical.

[0022] In this way, the rotation speed of the upper rotor can be controlled, and the parts inside the tank can be washed accurately. Also, by making the spray rotor spherical, the water column sprayed from the cleaning nozzle can be sprayed at an appropriate elevation angle, and the tank inner wall surface can be washed over a wide area. Effect of the Invention

[0023] According to the present invention, it is possible to provide a spray rotor capable of uniformly cleaning the inside of a tank in a short time and saving on cleaning liquid. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a perspective view of a spray rotor according to an embodiment, as viewed from above. [Diagram 2] FIG. 2 is a front view of the spray rotor according to the embodiment. [Diagram 3] 4 is a cross-sectional view showing a plane cut at a predetermined height of an upper rotating body according to an embodiment as viewed from above. FIG. [Figure 4] 4 is a cross-sectional view of a first injection hole group taken along line AA of the upper rotating body according to the embodiment, and a cross-sectional view of a second injection hole group taken along line BB of the upper rotating body shown in FIG. 3. [Diagram 5] 4 is a cross-sectional view of the third injection hole group taken along line CC of the upper rotating body according to the embodiment, and a cross-sectional view of the fourth injection hole group taken along line DD of the upper rotating body shown in FIG. [Figure 6] 4A is a cross-sectional view of the fifth injection hole group taken along line E-E in FIG. 3 , and a cross-sectional view of the sixth injection hole group taken along line F-F in the upper rotating body according to the embodiment. [Figure 7] 4 is a cross-sectional view showing a state in which a plane obtained by cutting a lower rotating body according to an embodiment at a predetermined height is viewed from above. FIG. [Figure 8] 11 is a diagram showing a state in which a water column injected from each injection hole group of the entire injection hole region formed on the upper rotating body in the embodiment hits the inner wall surface of the tank. FIG. [Figure 9] 13 is a bar graph showing the cleaning rate of the inside of the tank and the inside of the nozzle by the embodiment product and the cleaning rate of the inside of the tank and the inside of the nozzle by the conventional product. [Figure 10] 13 is a bar graph showing the cleaning efficiency of the inside of the tank and the inside of the nozzle by the embodiment product and the cleaning efficiency of the inside of the tank and the inside of the nozzle by the conventional product. [Figure 11] FIG. 11 is a front view of a spray rotor according to another embodiment. [Figure 12] FIG. 1 is a diagram showing a state in which the inside of a tank is cleaned using a conventional spray rotor. [Figure 13] FIG. 1 is a front view of a conventional spray rotor. [Figure 14] FIG. 13 is a diagram showing the state in which the inside of a cleaning tank is cleaned using a conventional product. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, with reference to the drawings, a spray rotor according to an embodiment of the present invention will be described by taking as an example a case where the spray rotor is spherical. Fig. 1 is a perspective view of the spray rotor according to the embodiment as viewed from above, and Fig. 2 is a view of the spray rotor as viewed from the front. As shown in Figs. 1 and 2, the spray rotor 2 is formed of a resin such as polytetrafluoroethylene (PTFE), and includes a nozzle portion 4, a fixed ring 6, and a ball main body 8 (rotor main body).

[0026] The outer diameter of the spray rotor 2 is preferably about 62 mm to 67 mm when it is attached to a nozzle 35 having an inner diameter of 80 mm formed in a tank 34 (see FIG. 8). In this specification, "upper" and "lower" are defined in the state shown in FIGS.

[0027] The nozzle part 4 has a cylindrical shape with a flow path 4a for the cleaning liquid formed inside, and a large diameter part 4b with an increased diameter is formed at the lower end. A thread groove (not shown) is formed on the outer periphery of the part of the nozzle part 4 where the fixing ring 6 is attached. Furthermore, a port (not shown) is formed in a part of the nozzle part 4 hidden by the ball body 8 through which the cleaning liquid injected from the injection hole group 12 (described later) passes.

[0028] The fixing ring 6 has a thread groove (not shown) formed on its inner circumferential surface, and is attached to a predetermined position by screwing.

[0029] The ball body 8 is a spherical rotating body with the rotation center line L as its axis and with a through hole (not shown) formed for passing the nozzle part 4 through, and includes an upper rotating body 8a and a lower rotating body 8b. Here, the lower rotating body 8b can rotate in the opposite direction to the upper rotating body 8a, and there may be a gap between the upper rotating body 8a and the lower rotating body 8b, but the upper rotating body 8a and the lower rotating body 8b may be in contact with each other.

[0030] This ball body 8 is first rotatably fixed in a predetermined position by penetrating the lower rotating body 8b through the nozzle portion 4 and seating it on the large diameter portion 4b, then penetrating the upper rotating body 8a through the nozzle portion 4 and abutting it against the lower rotating body 8b, and finally attaching the fixing ring 6 to the nozzle portion 4.

[0031] Three types of injection hole areas 10 are formed on the curved surface of the upper rotating body 8a: a high-angle injection hole area 10a for injecting a water column of cleaning liquid into the high-angle area of ​​the tank 34 (see Figure 8), a medium-angle injection hole area 10b for injecting a water column of cleaning liquid into the medium-angle area, and a low-angle injection hole area 10c for injecting a water column of cleaning liquid into the low-angle area.

[0032] The injection hole region 10 includes a plurality of injection hole groups 12 formed in a row in a direction perpendicular to the rotation direction of the ball body 8, i.e., in the direction of the rotation center line L. That is, each injection hole region 10 is provided with two injection hole groups 12 including a plurality of cleaning injection holes 8e that inject cleaning liquid, and each injection hole group 12 is formed symmetrically with respect to the rotation center line L of the ball body 8 (see FIG. 3).

[0033] The high-angle injection hole region 10a includes a first injection hole group 12a and a second injection hole group 12b as high-angle injection hole groups, the medium-angle injection hole region 10b includes a third injection hole group 12c and a fourth injection hole group 12d as medium-angle injection hole groups, and the low-angle injection hole region 10c includes a fifth injection hole group 12e and a sixth injection hole group 12f as low-angle injection hole groups.

[0034] In addition, three cleaning injection holes 8e are drilled in each of the first injection hole group 12a and the second injection hole group 12b, and four cleaning injection holes 8e are drilled in each of the third injection hole group 12c, the fourth injection hole group 12d, the fifth injection hole group 12e, and the sixth injection hole group 12f.

[0035] The number of cleaning injection holes 8e included in each injection hole group 12 is not necessarily limited to the above-mentioned number, and the number of cleaning injection holes 8e included in the first injection hole group 12a to the sixth injection hole group 12f may be in the range of 2 to 10. The outer diameter of the cleaning injection holes 8e is preferably in the range of 1.0 mm to 1.8 mm, and more preferably in the range of 1.2 mm to 1.5 mm.

[0036] 3 is a cross-sectional view showing a plane cut at a predetermined height of the upper rotor 8a as viewed from above. As shown in FIG. 3, each cleaning injection hole 8e constituting the injection hole group 12 is drilled in the side wall of the rotor body at a predetermined angle θ1 in the rotation direction with respect to a straight line X perpendicular to the rotation center line L on a plane centered on the rotation center line L. Here, the angle θ1 is 5 to 25°. This can promote the rotation of the upper rotor 8a.

[0037] 4 to 6 are cross-sectional views of each injection hole group 12 drilled in the upper rotor 8a. As shown in Figs. 4 to 6, each injection hole group 12 is formed symmetrically on both side walls at two locations with respect to the rotation center line L, and the angles of the water columns injected from each injection hole group 12 included in each injection hole region 10 are different.

[0038] Here, Figure 4(a) shows a cross section of the first injection hole group 12a (cross section taken along line A-A shown in Figure 3), Figure 4(b) shows a cross section of the second injection hole group 12b (cross section taken along line B-B shown in Figure 3), Figure 5(a) shows a cross section of the third injection hole group 12c (cross section taken along line C-C shown in Figure 3), Figure 5(b) shows a cross section of the fourth injection hole group 12d (cross section taken along line D-D shown in Figure 3), Figure 6(a) shows a cross section of the fifth injection hole group 12e (cross section taken along line E-E shown in Figure 3), and Figure 6(b) shows a cross section of the sixth injection hole group 12f (cross section taken along line F-F shown in Figure 3).

[0039] 4(a), in the first injection hole group 12a forming the high-angle injection hole region 10a for injecting a water column of cleaning liquid into the high-angle region, the angle α1 between the first water column 14a injected from the polar-most cleaning injection hole 8e and the equator 16 is in the range of 60° to 80°, and the angle β1 between the first water column 14a' injected from the equatorial-most cleaning injection hole 8e and the equator 16 is in the range of 50° to 70°. The angle γ1 between the first water column 14a and the first water column 14a' is in the range of 10° to 30°.

[0040] 4(b), in the second injection hole group 12b forming the high-angle injection hole region 10a for injecting a water column of cleaning liquid into the high-angle region, the angle α2 between the second water column 14b injected from the polar-most cleaning injection hole 8e and the equator 16 is in the range of 65° to 85°, and the angle β2 between the second water column 14b' injected from the equatorial-most cleaning injection hole 8e and the equator 16 is in the range of 55° to 75°. The angle γ2 between the second water column 14b and the second water column 14b' is in the range of 10° to 30°.

[0041] In other words, the angle between the water column sprayed from the cleaning jet hole 8e on the equatorial side of the high-angle injection hole group and the equator is 50° or more, and the angle between the water column sprayed from the cleaning jet hole 8e on the polar side of the high-angle injection hole group and the equator is 85° or less.

[0042] 5(a), in the third injection hole group 12c forming the medium angle injection hole region 10b for injecting a water column of cleaning liquid into the medium angle region, the angle α3 between the third water column 14c injected from the most polar cleaning injection hole 8e and the equator 16 is in the range of 25° to 50°, and the angle β3 between the third water column 14c' injected from the most equatorial cleaning injection hole 8e and the equator 16 is in the range of 10° to 35°. The angle γ3 between the third water column 14c and the third water column 14c' is in the range of 15° to 40°.

[0043] 5(b), in the fourth injection hole group 12d that forms the medium angle injection hole region 10b for injecting a water column of cleaning liquid into the medium angle region, the angle α4 between the fourth water column 14d injected from the polar most cleaning injection hole 8e and the equator 16 is in the range of 30° to 55°, and the angle β4 between the fourth water column 14d' injected from the equatorial most cleaning injection hole 8e is in the range of 10° to 45°. Also, the angle γ4 between the fourth water column 14d and the fourth water column 14d' is in the range of 10° to 45°.

[0044] In other words, the angle between the water column sprayed from the cleaning jet hole 8e on the equatorial side of the medium-angle injection hole group and the equator is 10° or more, and the angle between the water column sprayed from the cleaning jet hole 8e on the polar side of the medium-angle injection hole group and the equator is 55° or less.

[0045] 6(a), in the fifth injection hole group 12e forming the low-angle injection hole region 10c for injecting a water column of cleaning liquid into the low-angle region, the angle α5 between the fifth water column 14e injected from the polar-most cleaning injection hole 8e and the equator 16 is in the range of 10° to 25°, and the angle β5 between the fifth water column 14e' injected from the equatorial-most cleaning injection hole 8e and the equator 16 is in the range of 0° to 15°. The angle γ5 between the fifth water column 14e and the fifth water column 14e' is in the range of 10° to 25°.

[0046] 6(b), in the sixth injection hole group 12f forming the low-angle injection hole region 10c for injecting a water column of cleaning liquid into the low-angle region, the angle α6 between the sixth water column 14f injected from the polar-most cleaning injection hole 8e and the equator 16 is in the range of 10° to 30°, and the angle β6 between the sixth water column 14f' injected from the equatorial-most cleaning injection hole 8e and the equator 16 is in the range of 0° to 20°. The angle γ6 between the sixth water column 14f and the sixth water column 14f' is in the range of 10° to 30°.

[0047] In other words, the angle between the low-angle water column sprayed from the cleaning jet hole 8e, which is the equatorial-most of the low-angle injection hole group, and the equator is 0° or more, and the angle between the fifth water column sprayed from the cleaning jet hole 8e, which is the polar-most of the low-angle injection hole group, and the equator is 30° or less. The rotation speed of the upper rotor 8a is 5 rpm or more and 60 rpm or less, and since it rotates slowly, the inside of the tank 34 (see FIG. 8) can be thoroughly cleaned.

[0048] FIG. 7 is a cross-sectional view showing a state in which a plane cut at a predetermined height of the lower rotor 8b is viewed from above. As shown in FIG. 7, two rotation injection holes 8x for injecting cleaning liquid in a tangential direction to rotate the lower rotor 8b and two cleaning injection holes 8y for injecting cleaning liquid are drilled in the curved surface of the lower rotor 8b. Here, the rotation injection holes 8x and the cleaning injection holes 8y are drilled in the side wall of the rotor body at a predetermined angle θ2 in the rotation direction with respect to a straight line X perpendicular to the rotation center line L. Here, the angle θ2 is 5° to 25°. The lower rotor 8b comes into contact with the upper rotor 8a and rotates while sliding against the upper rotor 8a, thereby suppressing the rotation speed of the upper rotor 8a so that the upper rotor 8a rotates slowly.

[0049] In this spray rotor 2, the cleaning liquid supplied from the flow path 4a of the nozzle portion 4 is filled into the upper rotor 8a and the lower rotor 8b through a port (not shown) in the bowl body 8, and is sprayed from each cleaning jet hole 8e to promote the rotation of the upper rotor 8a, while the cleaning liquid is sprayed tangentially from the rotation jet hole 8x of the lower rotor 8b, causing the lower rotor 8b to rotate in the opposite direction to the upper rotor 8a, suppressing the rotation speed of the upper rotor 8a. Then, the cleaning liquid is sprayed from each cleaning jet hole 8e toward the part to be cleaned (for example, the inner wall surface of the tank 34).

[0050] Fig. 8 is a diagram showing a state in which a water column sprayed from each of the injection hole groups 12 in the entire injection hole region 10 formed in the upper rotor 8a hits the inner wall surface of the tank 34. As shown in Fig. 8, by forming the high-angle injection hole region 10a, the medium-angle injection hole region 10b, and the low-angle injection hole region 10c in the upper rotor 8a, it is possible to spray a water column not only to the medium-angle region 36b in the tank 34, but also to the high-angle region 36a and the low-angle region 36c. In addition, since the angles of the water columns sprayed from the injection hole groups 12 included in each injection hole region 10 are different, it is possible to clean a wide range of the inner wall surface of the tank 34. EXAMPLES

[0051] [Example 1] Next, an experiment on the cleaning rate performed using the spray rotor 2 (embodied product) according to the embodiment and the spray rotor 114 (conventional product) described in Patent Document 1 will be described. First, in the experiment, a tank equipped with the implemented product and a tank equipped with the conventional product were prepared. Here, the tanks used for each were the same. Both the implemented product and the conventional product were made of polytetrafluoroethylene (PTFE), and the external diameter of the implemented product was 65 mm and the external diameter of the conventional product was 70 mm. The tank is constructed from stainless steel and has an internal diameter of 1200mm with a northern hemisphere height to internal diameter ratio of 2:1.

[0052] Next, a total of 13 stainless steel test plates coated with food coloring and other artificial dirt were prepared. Of the 13 plates, 8 were to be placed on the inner wall surface of the tank, and 5 were to be placed inside the nozzle of the tank. The weights of the 8 test plates placed on the inner wall surface of the tank and the 5 test plates placed inside the nozzle were measured. Next, the 8 test plates were placed on the inner wall surface of both tanks, and the 5 test plates were placed inside the nozzle, and after cleaning each tank for a specified time using the implementation product and the conventional product, the test plates were removed and their weights were measured.

[0053] In the test, the flow rate of the tested product was 70 (L / min) and the spray pressure of the cleaning water was 0.15 (Mpa), while the flow rate of the conventional product was 90 (L / min) and the spray pressure of the cleaning water was 0.15 (Mpa).

[0054] The formula for calculating the cleaning rate based on the weight of the test plate before and after cleaning is as follows: Cleaning rate = (weight of test plate before cleaning - weight of test plate after cleaning) / weight of test plate before cleaning ... (Formula 1)

[0055] FIG. 9(a) is a bar graph showing the cleaning rate inside the tank for the practical product and the conventional product calculated using this formula 1 (the practical product is shown on the left, and the conventional product on the right; same below), and FIG. 9(b) is a bar graph showing the cleaning rate inside the nozzle for the practical product and the conventional product calculated using this formula 1.

[0056] Note that High_100A is a nozzle with an inner diameter of 100 mm located in high angle region 36a, Medium_50A is a nozzle with an inner diameter of 50 mm located in medium angle region 36b, and Low_100A is a nozzle with an inner diameter of 100 mm located in low angle region 36c. Note that the embodiment product and the conventional product are attached to nozzle 35 with an inner diameter of 80 mm located in high angle region 36a in tank 34 (see FIG. 8).

[0057] Figure 9(a) shows that the cleaning rate of the inside of the tank by the implemented product is higher in the high-angle and low-angle regions than the conventional product. Also, Figure 9(b) shows that the cleaning rate of the inside of the tank nozzle by the implemented product is higher in the medium-angle and low-angle regions than the conventional product.

[0058] The cleaning efficiency of the implemented product and the conventional product are shown in Figure 10(a) and (b). The formula for calculating the cleaning efficiency is as follows: Cleaning efficiency = cleaning rate / flow rate ... (Formula 2)

[0059] According to the spray rotor 2 of the embodiment, by forming the high-angle injection hole region 10a, the medium-angle injection hole region 10b, and the low-angle injection hole region 10c in the upper rotor 8a, it is possible to spray a water column not only to the medium-angle region 36b in the tank 34, but also to the high-angle region 36a and the low-angle region 36c. Also, since the angles of the water columns sprayed from the injection hole groups 12 included in each injection hole region 10 are different, it is possible to clean a wide area of ​​the tank inner wall surface. Therefore, the inside of the tank 34 can be cleaned evenly in a short time, and cleaning liquid can be saved.

[0060] In addition, by forming the first injection hole group 12a and the second injection hole group 12b with different injection angles adjacent to each other on the upper rotor 8a and the lower rotor 8b, it is possible to evenly clean the inside of the tank 34. In addition, there is no need to adjust the injection angle for each tank 34 to be cleaned, and the device can be easily attached to any tank 34.

[0061] In addition, since the spray rotor 2 has a two-stage structure with an upper rotor 8a and a lower rotor 8b, dirt on areas washed away by the cleaning liquid sprayed from the upper rotor 8a is further washed away by the cleaning liquid sprayed from the lower rotor 8b, so that dirt inside the tank 34 can be thoroughly cleaned.

[0062] Furthermore, by making the spray rotor 2 spherical, the angle of the water column sprayed from the cleaning nozzle 8e can be adjusted to an appropriate elevation angle, making it possible to clean the inner wall surface of the tank 34 over a wide area.

[0063] In the above embodiment, the spray rotor 2 has an upper rotor 8a and a lower rotor 8b, but the spray rotor does not necessarily have to be spherical, and does not necessarily have to have the lower rotor 8b. When the spray rotor 2 is not spherical, it may be, for example, frustum-shaped.

[0064] In addition, in the above embodiment, the case where the lower rotating body 8b rotates in the opposite direction to the upper rotating body 8a has been illustrated, but the lower rotating body 8b may rotate in the same forward direction as the upper rotating body 8a.

[0065] Furthermore, in the above-described embodiment, so long as the inside of tank 34 can be cleaned evenly in a short time and cleaning liquid can be saved, it is not necessary for the high-angle injection hole area 10a, the medium-angle injection hole area 10b, the low-angle injection hole area 10c, and each of the injection hole groups to be formed on the curved surface of upper rotating body 8a.

[0066] In other words, it is sufficient that the side wall of the bowl body 8 includes multiple nozzles with different spray angles in the elevation direction, and when cleaning is performed while rotating the spray rotor 2, multiple water columns are sprayed from each cleaning nozzle 8e in the elevation direction of the northern hemisphere in the tank 34.

[0067] Specifically, by configuring the cleaning injection holes 8e to include injection holes having different angles in the elevation angle direction, such as multiple high-angle injection holes for injecting a water column into a high-angle region, multiple medium-angle injection holes for injecting a water column into a medium-angle region, and multiple low-angle injection holes for injecting a water column into a low-angle region, the multiple water columns sprayed from each cleaning injection hole 8e are sprayed in the elevation angle direction of the northern hemisphere inside the tank 34, thereby achieving the function of cleaning a wide area of ​​the tank's inner wall surface.

[0068] For example, a high-angle injection hole is configured so that the angle of the ejected water column with respect to the equator is greater than 60° and less than 85°, a medium-angle injection hole is configured so that the angle of the ejected water column with respect to the equator is greater than 30° and less than 60°, and a low-angle injection hole is configured so that the angle of the ejected water column with respect to the equator is greater than 0° and less than 30°.

[0069] In this case, for example, as in the spray rotor 22 shown in Figure 11, even if there is no injection hole group 12 and the cleaning injection holes 8e are formed in a spiral shape on the curved surface of the ball body 8, by including high-angle injection holes, medium-angle injection holes, and low-angle injection holes in the cleaning injection holes 8e, it is possible to realize the function of spraying multiple water columns from each cleaning injection hole 8e in the elevation angle direction of the northern hemisphere in the tank 34.

[0070] Furthermore, in the above-described embodiment, the cleaning injection holes 8e arranged in the high-angle injection hole region 10a may include not only high-angle injection holes but also medium-angle injection holes and low-angle injection holes, the cleaning injection holes 8e arranged in the medium-angle injection hole region 10b may include not only medium-angle injection holes but also high-angle injection holes and low-angle injection holes, and the cleaning injection holes 8e arranged in the low-angle injection hole region 10c may include not only low-angle injection holes but also high-angle injection holes and medium-angle injection holes.

[0071] In the above-described embodiment, a plurality of cleaning injection holes 8e having the same injection angle in the elevation angle direction may be included in some of the nozzles. In the above embodiment, the cleaning injection holes 8e formed in the spray rotor 2 do not necessarily have to have the same hole diameter. [Explanation of symbols]

[0072] 2 Spray Rotor 4 Nozzle section 4a Flow path 4b Large diameter section 6 Retaining ring 8 Ball body 8a Upper Rotating Body 8b Lower Rotating Body 8e Cleaning nozzle 8x Rotational Jets 8y Cleaning nozzle 10 Injection hole area 10a High angle injection area 10b Medium angle injection hole area 10c Low angle injection hole area 12 injection hole group 12a 1st injection hole group 12b 2nd injection hole group 12c 3rd injection hole group 12d 4th injection hole group 12e 5th injection hole group 12f 6th injection hole group 14a 1st water column 14b 2nd water column 14c 3rd water column 14d 4th water column 14e 5th water column 14f 6th water column 16 Equator 22 Spray Rotor 34 Tank 35 Nozzle 36a High angle area 36b Medium angle area 36c low angle area 102 Tank 102a Upper lid part 102b Nozzle 102c Nozzle 104 Spray Rotor 106 Upper Rotating Body 108 Lower Rotating Body 110 Rotational injection hole 112 Cleaning nozzle 114 Spray Rotor 136 Areas where cleaning must be done by flowing water (areas where the water column does not reach easily) L Rotation center line A straight line perpendicular to XL

Claims

1. A spray rotor disposed in a tank for cleaning the inside of the tank, A plurality of cleaning injection holes are formed in a rotating rotor body, Some or all of the plurality of cleaning jet holes have different jet angles in an elevation angle direction, The cleaning injection holes are drilled in the side wall of the rotor body at a predetermined angle in the rotation direction with respect to a straight line perpendicular to the rotation axis in a plane centered on the rotation axis, A spray rotor characterized in that, when cleaning is performed while rotating the spray rotor, a plurality of water columns are sprayed from each cleaning nozzle in the elevation direction of the northern hemisphere within the tank.

2. The cleaning injection hole has: A plurality of high-angle injection holes for injecting a water column into a high-angle region; A plurality of mid-angle injection holes for injecting a water column into a mid-angle region; Multiple low-angle injection holes for injecting water columns into low-angle areas; Includes: Based on the equator perpendicular to the rotation axis of the rotor body, The angle of the water column injected from the high-angle injection hole is greater than 60° and less than 85°, The angle of the water column ejected from the medium angle injection hole is greater than 30° and less than 60°, 2. The spray rotor according to claim 1, wherein an angle of the water columns ejected from the low-angle injection holes is 0° or more and 30° or less.

3. a plurality of injection hole regions are arranged on a side wall of the rotor body, the injection hole regions having injection hole groups formed in a row in a direction perpendicular to a rotation direction of the rotor body; The injection hole area includes: a high-angle injection hole area for injecting a water column into a high-angle area; a medium angle injection hole area for injecting a water column into a medium angle area; A low-angle injection hole area for injecting a water column into a low-angle area. Includes:

2. The spray rotor according to claim 1, wherein angles of water plumes sprayed from each of the nozzle hole groups included in each of the nozzle hole regions are different from each other.

4. the high-angle injection hole region includes a high-angle injection hole group configured from a plurality of the cleaning injection holes, an angle between the water column jetted from the cleaning jet hole on the most equatorial side of the high-angle injection hole group and the equator is in the range of 50° or more, and an angle between the water column jetted from the cleaning jet hole on the most polar side of the high-angle injection hole group and the equator is in the range of 85° or less, the medium-angle injection hole region includes a medium-angle injection hole group configured from a plurality of the cleaning injection holes, an angle between the water column jetted from the cleaning jet hole on the most equatorial side of the medium-angle injection hole group and the equator is in a range of 10° or more, and an angle between the water column jetted from the cleaning jet hole on the most polar side of the medium-angle injection hole group and the equator is in a range of 55° or less, the low-angle injection hole region includes a low-angle injection hole group composed of a plurality of cleaning injection holes, 4. A spray rotor as described in claim 3, characterized in that the angle between the equator and the low-angle water column sprayed from the cleaning jet hole on the equatorial side of the low-angle injection hole group is 0° or more, and the angle between the equator and the water column sprayed from the cleaning jet hole on the polar side of the low-angle injection hole group is 30° or less.

5. 4. The spray rotor according to claim 3, wherein each of the groups of injection holes includes 2 to 10 of the cleaning injection holes.

6. The spray rotor described in claim 1, characterized in that the rotor main body comprises an upper rotor having high-angle injection holes, medium-angle injection holes, and low-angle injection holes, or a high-angle injection hole area, a medium-angle injection hole area, and a low-angle injection hole area, and a lower rotor that rotates in a forward and reverse direction with the upper rotor, and the upper rotor and the lower rotor are spherically configured.

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