TWI859251B - Spray ball - Google Patents

Abstract

This invention provides a spray ball which can clean tanks uniformly and can be easily installed in any tank body. The spray ball has a first injection hole group and a second injection hole group formed in rows on a curved surface of a ball body which would rotates, along a direction orthogonal to the rotation direction of the ball body, wherein the first injection hole group includes a plurality of injection holes for washing which are perforated radially from an equator side toward a pole side of the curved surface with a first imaginary point being taken as the reference point, that is imagined to be on a straight line passing through an imaginary reference point injection hole located closest to the equator side of the curved surface and the center of curvature of the ball body and outside the ball body, , and the section injection hole group includes a plurality of injection holes for washing which are perforated radially from the pole side toward the equator side of the curved surface with a second imaginary point being taken as the reference point, that is imagined to be on a straight line passing through an imaginary reference point injection hole located closest to the pole side of the curved surface and the center of curvature of the ball body and outside the ball body.

Description

Spray ball

The present invention relates to a tank cleaning ball for cleaning the inner surface of a tank body.

In the past, industries such as the food and pharmaceutical industries used disinfection tanks for various purposes such as product storage, preparation, and sterilization. Since such tanks must maintain a clean interior, spray balls are used as dedicated cleaning devices.

Specifically, as shown in FIG8 , the spray ball is inserted into the tank body 102 from the nozzle 102b formed in the upper cover portion 102a of the tank body 102. As shown in FIG9 , the spray ball 104 is, for example, a rotating spray ball, and the rotating spray ball has an upper rotating body 106 and a lower rotating body 108 that rotate in opposite directions. In addition, the upper rotating body 106 and the lower rotating body 108 are each provided with two rotating spray holes 110 and two washing spray holes 112. The rotating spray hole 110 is used to rotate the upper rotating body 106 or the lower rotating body 108 to spray the cleaning liquid in the tangential direction, and the cleaning spray hole 112 is used to spray the cleaning liquid. By using the spray ball 104, the tank 102 can be cleaned without taking up space.

[Prior Art Literature]

[Patent Literature]

[Patent document 1] Japanese Patent Publication No. 2014-233682

However, when the above-mentioned spray ball 104 is used, the problem that the areas in the tank 102 that are hit by the water column sprayed by the spray hole 112 for cleaning are cleaned, while the areas that are not hit by the water column are not directly cleaned. Therefore, the areas that are not hit by the water column can only be cleaned by the flow of cleaning liquid flowing down from the areas hit by the water column.

In addition, since there are only four spray holes 112 for cleaning, there are few places that can be cleaned with water columns, and the cleaning is uneven. In particular, it is difficult to clean the inside of the nozzle 102c.

In order to solve this problem, there is a known tank cleaning ball sprayer in which an extension tube is provided at the spray hole of the ball sprayer (for example, refer to Patent Document 1). However, when the extension tube is provided, the length of the extension tube must be changed according to each tank body, so there is a problem that it is time-consuming and labor-intensive to install it on the tank body.

The purpose of the present invention is to provide a spray ball that can clean the tank evenly and can be easily installed in any tank body.

The jet ball of the present invention has a first jet hole group and a second jet hole group formed in a row on the curved surface of a rotating ball body, along a direction orthogonal to the rotation direction of the aforementioned ball body;

The aforementioned first jet hole group includes a plurality of jet holes for cleaning, and the jet holes for cleaning are formed by radially penetrating from the equator side of the aforementioned curved surface toward the pole side, with the imaginary first imaginary point located on a straight line passing through the imaginary reference point jet hole located at the position closest to the equator of the aforementioned curved surface and the curvature center of the aforementioned spherical body and located outside the spherical body as the reference point;

The second jet hole group includes a plurality of jet holes for cleaning, which are formed by radially piercing from the pole side of the curved surface toward the equator side, with a second imaginary point located on a straight line passing through an imaginary reference point jet hole located at the position closest to the pole side of the curved surface and the center of curvature of the spherical body and located outside the spherical body as a reference point.

In this way, since the first and second ejection hole groups with different ejection angles are formed adjacent to the upper rotating body and the lower rotating body, the tank can be cleaned uniformly. In addition, it is not necessary to adjust the ejection angle according to each tank to be cleaned, and it can be easily installed on any tank.

Furthermore, in the jet ball of the present invention, the ball body comprises an upper rotating body and a lower rotating body rotating in the opposite direction to the upper rotating body, and the first jet hole group and the second jet hole group are formed on the upper rotating body and the lower rotating body, respectively.

In this way, by rotating the upper rotating body and the lower rotating body in opposite directions, the cleaning efficiency can be improved.

Furthermore, in the spray ball of the present invention, the rotation speed of the upper rotating body and the lower rotating body is greater than 5 rpm and less than 15 rpm.

When the rotating body is rotated at this speed, the inside of the tank can be cleaned carefully.

Furthermore, in the spray ball of the present invention, the first spray hole group and the second spray hole group respectively include four to eight spray holes for cleaning.

In this way, if each jet hole group contains a plurality of jet holes for cleaning, it can cover a wide cleaning range from the equator to the poles.

Furthermore, in the jet ball of the present invention, the angle between the first water column ejected from the aforementioned cleaning jet hole closest to the polar side of the aforementioned first jet hole group and the first water column ejected from the aforementioned cleaning jet hole closest to the equatorial side of the aforementioned first jet hole group is in the range of 5° to 50°; the angle between the second water column ejected from the aforementioned cleaning jet hole closest to the polar side of the aforementioned second jet hole group and the second water column ejected from the aforementioned cleaning jet hole closest to the equatorial side of the aforementioned second jet hole group is in the range of 5° to 50°.

If the water column is sprayed in this angle range, almost any corner in the tank 34 can be cleaned.

According to the present invention, a spray ball can be provided, which can clean the inside of the tank evenly and can be easily installed in any tank body.

2: Spray ball

4: Pipe mouth

4a: Flow path

4b: Main Path

6: Fixed ring

8: spherical body

8a: Upper rotating body

8b: Lower rotating body

8c: Rotary jet hole

8d: Large jet hole for cleaning

8e: Spray hole for cleaning

12: Jet hole group

12a: The first perforation group

12b: Second perforation group

14: Hypothetical reference point perforation

16: Center of curvature

18: Straight line

20: The first imaginary point

22: Hypothetical reference point jet hole

24: Straight line

26: Second imaginary point

32: Water column

32a: First water column

32b: Second water column

34: Tank

102: Tank

102a: Upper cover

102b: pipe mouth

102c: pipe mouth

104: Spray ball

106: Upper rotating body

108: Lower rotating body

110: Rotary jet hole

112: Spray hole for cleaning

L: Rotation center line

α,β,γ,δ: angle

Figure 1 is a three-dimensional view of the implementation form of the jet ball as seen from above.

Figure 2 is a front view of the implementation type of the spray ball.

FIG3 is a cross-sectional view showing the first ejection hole group formed on the upper rotating body of the embodiment.

FIG4 is a cross-sectional view showing the second ejection hole group formed on the upper rotating body of the embodiment.

FIG5 is a diagram showing the range of the water jets ejected from a first ejection hole group and a second ejection hole group formed on the upper rotating body of the embodiment to the inner surface of the tank.

Figure 6 shows the conditions inside the tank using a ball jet cleaning method in practice.

FIG7 is a bar graph showing the cleaning rates of the groove and nozzle of the ball jet of the implementation and the cleaning rates of the groove and nozzle of the conventional ball jet.

Figure 8 shows the condition inside the tank when using a conventional ball jet cleaning system.

Figure 9 shows a conventional ball jet.

The following is a description of the spray ball of the embodiment of the present invention with reference to the drawings. FIG1 is a three-dimensional view of the spray ball of the embodiment seen from above, and FIG2 is a view of the spray ball of the embodiment seen from the front. As shown in FIG1 and FIG2, the spray ball 2 is formed of a resin such as polytetrafluoroethylene (PTFE), and has a nozzle 4, a fixing ring 6, and a ball body 8. Here, in this specification, "upper" or "lower" refers to the definition according to the state of FIG1 and FIG2.

The nozzle 4 is cylindrical in shape with a flow path 4a for cleaning liquid formed inside, and a large diameter portion 4b with an expanded diameter is formed at the lower end. In addition, a thread not shown is formed on the outer periphery of the portion of the nozzle 4 where the fixing ring 6 is to be installed. Furthermore, a through hole not shown is formed in the portion of the nozzle 4 blocked by the ball body 8 to allow the cleaning liquid ejected by the ejection hole group 12 described later to pass through.

The fixing ring 6 has a thread (not shown) formed on the inner circumference and is installed at a predetermined position by screwing the thread.

The ball body 8 is a spherical rotating body with a through hole (not shown) formed with the rotation center line L as the axis for the nozzle 4 to pass through, and has an upper rotating body 8a and a lower rotating body 8b that rotate in opposite directions. First, the lower rotating body 8b is passed through the nozzle 4 and its bottom is connected to the large diameter part 4b, then the upper rotating body 8a is passed through the nozzle 4 and abuts against the lower rotating body 8b, and finally, the fixing ring 6 is installed on the nozzle 4 to rotatably fix the ball body 8 at a predetermined position.

Here, two rotating spray holes 8c and a large spray hole 8d for cleaning are respectively bored on the curved surfaces of the upper rotating body 8a and the lower rotating body 8b. The rotating spray hole 8c is used to spray cleaning liquid in the tangential direction in order to rotate the upper rotating body 8a or the lower rotating body 8b. The large spray hole 8d for cleaning sprays cleaning liquid. Among them, the rotating spray hole 8c is processed to rotate the upper rotating body 8a and the lower rotating body 8b in opposite directions. Furthermore, the rotation speed of the upper rotating body 8a and the lower rotating body 8b is more than 5 rpm and less than 15 rpm, and rotates slower than the previous spray ball 104. Therefore, compared with the conventional ball spray 104, the inside of the tank 34 can be cleaned more carefully (see FIG. 5).

In addition, in the upper rotating body 8a and the lower rotating body 8b, the spray hole group 12 including a plurality of spray holes 8e for spraying the cleaning liquid is formed at two locations in a line symmetrical manner with the rotation center line L of the spherical body 8 as the axis. In addition, the spray hole group 12 includes a first spray hole group 12a and a second spray hole group 12b formed in two adjacent rows. The first spray hole group 12a and the second spray hole group 12b are formed on the curved surfaces of the upper rotating body 8a and the lower rotating body 8b in a direction orthogonal to the rotation direction of the upper rotating body 8a and the lower rotating body 8b, that is, in the direction of the rotation center line L. Specifically, the first jet hole group 12a and the second jet hole group 12b are respectively provided with four to eight jet holes 8e for cleaning.

In this spray ball 2, the cleaning liquid supplied from the flow path 4a of the nozzle 4 is filled into the upper rotating body 8a and the lower rotating body 8b through the through port, and is sprayed from the rotation spray hole 8c in the tangential direction to control the upper rotating body 8a and the lower rotating body 8b to rotate in opposite directions. The upper rotating body 8a and the lower rotating body 8b spray the cleaning liquid from the large cleaning spray hole 8d and the cleaning spray hole 8e to the part to be cleaned while rotating in opposite directions.

Next, the ejection hole group 12 is described in detail. FIG. 3 is a cross-sectional view showing the first ejection hole group 12a formed in the upper rotating body 8a. When forming the first ejection hole group 12a, first, as shown in FIG. 3, the position of the ejection hole 8e for cleaning included in the first ejection hole group 12a, which is located closest to the equator of the curved surface, is determined as the imaginary reference point ejection hole 14. Next, a straight line 18 passing through the imaginary reference point ejection hole 14 and the center of curvature 16 of the upper rotating body 8a is determined, and a first imaginary point 20 located on this straight line 18 and outside the spherical body 8 is assumed. Next, with the first imaginary point 20 as the reference point, multiple cleaning jet holes 8e are radially drilled at predetermined intervals from the equator side of the curved surface toward the pole side. In this way, the hole column of the cleaning jet holes 8e drilled from the equator side to the pole side of the curved surface is the first jet hole group 12a.

Fig. 4 is a cross-sectional view showing the second ejection hole group 12b formed in the upper rotating body 8a. To form the second ejection hole group 12b, first, as shown in Fig. 4, the position of the ejection hole 8e for cleaning included in the second ejection hole group 12b, which is located closest to the extreme side of the curved surface, is determined as the imaginary reference point ejection hole 22. Next, a straight line 24 passing through the imaginary reference point ejection hole 22 and the center of curvature 16 of the upper rotating body 8a is determined, and a second imaginary point 26 located on this straight line 24 and outside the spherical body 8 is assumed. Next, with the second imaginary point 26 as the reference point, multiple cleaning jet holes 8e are radially drilled at predetermined intervals from the pole side of the curved surface toward the equator side. In this way, the hole column of the cleaning jet holes 8e drilled from the equator side to the pole side of the curved surface is the second jet hole group 12b.

Here, the case where the first ejection hole group 12a and the second ejection hole group 12b are formed on the upper rotating body 8a is described. However, the lower rotating body 8b also forms the first ejection hole group 12a and the second ejection hole group 12b in the same manner as the upper rotating body 8a.

FIG5 is a diagram showing a state where the first water column 32a ejected from the first ejection hole group 12a formed in the upper rotating body 8a and the second water column 32b ejected from the second ejection hole group 12b are ejected onto the inner surface of the tank 34. Here, FIG5 shows only the state where the water column is ejected from one set of the first ejection hole group 12a and the second ejection hole group 12b formed in the upper rotating body 8a for the sake of simplicity, and omits the water column 32 ejected from the other set of the first ejection hole group 12a and the second ejection hole group 12b and the water column ejected from the lower rotating body 8b. As shown in Figure 5, by drilling the first and second jet hole groups 12a and 12b with different jet angles in the upper rotating body 8a, the inner surface of the tank body can be cleaned in a wide range. In addition, since the first and second jet hole groups 12a and 12b radially drill the cleaning jet holes 8e with the first and second imaginary points 20 and 26 as reference points, respectively, the water column 32 is sprayed at an angle that does not interfere with each other, and the tank body 34 is cleaned uniformly.

Here, the angle α formed by the first water column 32a ejected from the washing ejection hole 8e closest to the pole side of the first ejection hole group 12a and the first water column 32a ejected from the washing ejection hole 8e closest to the equator of the first ejection hole group 12a is within a range of 5° to 50°. Furthermore, the angle β formed by the second water column 32b ejected from the washing ejection hole 8e closest to the pole side of the second ejection hole group 12b and the second water column 32b ejected from the washing ejection hole 8e closest to the equator of the second ejection hole group 12b is also within a range of 5° to 50°. Furthermore, the angle γ formed by the first water column 32a ejected from the washing ejection hole 8e closest to the equator of the first ejection hole group 12a and the second water column 32b ejected from the washing ejection hole 8e closest to the pole of the second ejection hole group 12b is in the range of 10° to 60°. Furthermore, the angle δ formed by the equator and the large washing ejection hole 8d is in the range of 50° to 70°.

Therefore, if the upper rotating body 8a and the lower rotating body 8b formed with two groups of first ejection hole groups 12a and second ejection hole groups 12b are used, almost any corner in the tank body 34 can be cleaned as shown in FIG6. In addition, in FIG5 and FIG6, the tank body 34 is observed from different directions.

[Implementation example]

Next, the experiment of cleaning rate using the spray ball 2 of the embodiment and the conventional spray ball 104 is described. First, in the experiment, a tank body with the spray ball 2 of the embodiment installed and a tank body with the conventional spray ball 104 installed were prepared. Here, the tank bodies used for both are the same. In addition, the spray ball 2 and the conventional spray ball 104 are both made of polytetrafluoroethylene (PTFE), and the tank body is made of stainless steel.

Next, a total of 17 stainless steel test plates coated with food red pigments as simulated dirt were prepared. Of the 17 test plates, 12 were placed on the inner wall of the tank and 5 were placed in the nozzle of the tank. The weights of the 12 test plates placed on the inner wall of the tank and the 5 test plates placed in the nozzle of the tank were measured. Next, 12 test plates were placed on the inner wall of both tanks and 5 test plates were placed in the nozzle, and the tank was cleaned for a predetermined time using the spray ball 2 and the conventional spray ball 104, and then the test plates were removed and the weights were measured.

The formula for calculating the cleaning rate based on the weight of the test panel before and after cleaning is as follows.

(Test plate weight before cleaning - Test plate weight after cleaning) / Test plate weight before cleaning... (Mathematical formula 1)

FIG7(a) is a bar graph showing the tank cleaning rate of the ball jet 2 of the embodiment calculated using the mathematical formula 1 and the tank cleaning rate of the conventional ball jet 104. FIG7(b) is a bar graph showing the nozzle cleaning rate of the ball jet 2 of the embodiment calculated using the mathematical formula 1 and the nozzle cleaning rate of the conventional ball jet 104.

As shown in Figure 7(a), the cleaning rate of the tank of the conventional ball jet 104 is 27.4%, while the cleaning rate of the tank of the embodiment of the ball jet 2 is 45.3%. In addition, as shown in Figure 7(b), the cleaning rate of the nozzle of the conventional ball jet 104 is 5.3%, while the cleaning rate of the nozzle of the embodiment of the ball jet 2 is 21.8%.

According to the spray ball 2 of this embodiment, since the first spray hole group 12a and the second spray hole group 12b with different spray angles are formed adjacent to the upper rotating body 8a and the lower rotating body 8b, the tank body 34 can be cleaned uniformly. In addition, it is not necessary to adjust the spray angle according to each tank body 34 to be cleaned, and it can be easily installed in any tank body 34.

In addition, since the spray ball 2 has a double structure with an upper rotating body 8a and a lower rotating body 8b, the dirt washed by the cleaning liquid sprayed from the upper rotating body 8a is further washed by the cleaning liquid sprayed from the lower rotating body 8b, so the dirt in the tank body 34 can be washed more carefully.

In addition, in the above-mentioned embodiment, two rotating spray holes 8c and two large spray holes 8d for washing are formed on the curved surfaces of the upper rotating body 8a and the lower rotating body 8b, respectively. However, three or more rotating spray holes 8c and three or more large spray holes 8d for washing may be formed.

In addition, in the above-mentioned embodiment, more jet hole groups 12 may be formed on the upper rotating body 8a and the lower rotating body 8b. For example, a third jet hole group adjacent to the first jet hole group 12a or the second jet hole group 12b may be formed. In addition, the inclination angle of the washing jet hole 8e included in the third jet hole group is different from the inclination angle of the washing jet hole 8e included in the first jet hole group 12a or the second jet hole group 12b.

8a: Upper rotating body

8e: Spray hole for cleaning

12a: The first perforation group

14: Hypothetical reference point perforation

16: Center of curvature

18: Straight line

20: The first imaginary point

L: Rotation center line

Claims (5)

A jet ball has a first jet hole group and a second jet hole group formed in a row on a curved surface of a rotating spherical body in a direction orthogonal to the rotation direction of the spherical body; The aforementioned first jet hole group includes a plurality of jet holes for cleaning, and the jet holes for cleaning are formed by radially penetrating from the equator side of the aforementioned curved surface toward the pole side, with the first imaginary point located on a straight line passing through the imaginary reference point jet hole located at the position closest to the equator of the aforementioned curved surface and the center of curvature of the aforementioned spherical body and located outside the spherical body as the reference point; The second jet hole group includes a plurality of jet holes for cleaning, which are formed by radially piercing from the pole side of the curved surface toward the equator side, with a second imaginary point located on a straight line passing through an imaginary reference point jet hole located at the position closest to the pole side of the curved surface and the center of curvature of the spherical body and located outside the spherical body as a reference point. The jet ball as described in claim 1, wherein the ball body comprises an upper rotating body and a lower rotating body rotating in the opposite direction to the upper rotating body, and the first jet hole group and the second jet hole group are formed on the upper rotating body and the lower rotating body, respectively. The ball spray as described in claim 2, wherein the rotation speed of the upper rotating body and the lower rotating body is greater than 5 rpm and less than 15 rpm. A spray ball as described in any one of claims 1 to 3, wherein the first spray hole group and the second spray hole group respectively include four to eight spray holes for cleaning. A jet ball as described in any one of claims 1 to 3, wherein the angle between the first water column ejected from the aforementioned cleaning jet hole closest to the polar side of the aforementioned first jet hole group and the first water column ejected from the aforementioned cleaning jet hole closest to the equatorial side of the aforementioned first jet hole group is in the range of 5° to 50°; the angle β between the second water column ejected from the aforementioned cleaning jet hole closest to the polar side of the aforementioned second jet hole group and the second water column ejected from the aforementioned cleaning jet hole closest to the equatorial side of the aforementioned second jet hole group is in the range of 5° to 50°.

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