Water purification device

Abstract

To provide a structure capable of further improving performance in a water purifying device of ultra-low speed rotation.SOLUTION: The water purifying device 10 for purifying water while rotating blades 50 extended radially on a water surface 64 is provided with a float body 17 arranged under the rotary shaft 12, a float body housing 14 surrounding the float body 17 and rotated by the rotary shaft 12, a rod 18 radially extended from the float body housing 14, and the blades 50 provided on the rod 18, and a water passage 5 is provided between the blades 50 and the float body housing 14 to flow water pushed by the blades 50.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a water purification device for purifying ponds, marshes, lakes, estuaries, creeks, etc. [Background technology]

[0002] In large aquariums, ponds, swamps, lakes, estuaries, coves, and other bodies of water with little or no current, decay and lack of oxygen can become a problem. Various measures have been proposed to eliminate putrefaction and oxygen deficiency, among which a water purification device with excellent energy-saving performance is known (see, for example, Patent Document 1 (Fig. 2)).

[0003] Patent Document 1 will be explained with reference to the following figure. FIG. 8 is a diagram illustrating the basic structure of a conventional water purifying device. The water purification device 100 comprises a base 102 supported by a float 101, a motor 103 supported by the base 102, a disk 105 supported by a rotating shaft 104 of the motor 103, and a plurality of blades 106 arranged radially on the underside of the disk 105. The disk 105 is a hollow body and also serves as a floating body.

[0004] When the disk 105 is rotated by the rotating shaft 104, the blades 106 generate a current on the water surface 107 as indicated by the arrow (111). In conjunction with the flow of arrow (111), a cylindrical flow (arrow (112)) is generated. This cylindrical flow keeps the water circulating, eliminating decay and oxygen deficiency.

[0005] The rotating shaft 104 rotates at a rotational speed of 3 to 6 revolutions per minute. Since the rotational speed of a general-purpose electric motor is 1450 to 1500 revolutions per minute, a rotational speed of 3 to 6 revolutions per minute is considered extremely slow. An advantage of this extremely slow speed is that only a very small amount of electrical energy is required to be supplied to the motor 103.

[0006] However, because the speed is extremely low, the centrifugal force exerted by the blades 106 is small, which inevitably weakens the flow inside the cylindrical flow (arrows (113) and (114)). In addition, the flows of the arrows (113) and (114) hit the disk 105 after rising and stagnate for a while. This stagnation further weakens the upward movement, and the performance of the water purification device 100 deteriorates.

[0007] However, even in ultra-low speed water purification devices, an increase in circulation flow is required, and a high performance structure is desirable. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 3360075 Summary of the Invention [Problem to be solved by the invention]

[0009] An object of the present invention is to provide a structure that can further improve performance in a water purification device that rotates at an ultra-low speed. [Means for solving the problem]

[0010] After trying various solutions, the inventors have succeeded in establishing a structure that can solve the problem. The process of this success will be explained with reference to Figures 1(a) and 1(b).

[0011] FIG. 1(a) is a diagram of a conventional water purification device 100. 1(a), the bottom surface of the disk 105 obstructs the upward flow (arrow (113)). As a first measure, the diameter of the disk 105 is reduced.

[0012] Centrifugal force is mrω 2(m: mass, r: radius, ω: angular velocity). To increase the centrifugal force, the blades 106 are separated from the disk 105 and placed outside. In other words, the radius r is increased as a second measure. Since the blades 106 interfere with the float 101, the float 101 is removed.

[0013] As a result of taking the above first and second measures, the water purification device 10 shown in FIG. 1(b) was obtained. As shown in Figure 1(b), the water purification device 10 comprises a base 11 placed in the air, a motor 13 with a reducer fixed to the base 11 with a rotating shaft 12 extending downward, a float housing 14 fixed to the rotating shaft 12, a float 17 stored in the float housing 14, a rod 18 extending radially from the float housing 14, and blades 50 attached to the rod 18.

[0014] The float 17 is housed in the float housing 14 so as to be sandwiched between the upper housing part 15 and the lower housing part 16 . In principle, the base 11 is pulled by a plurality of wires 19 to prevent rotation. The wires 19 may be ropes or strings.

[0015] When the blades 50 are rotated by the rotating shaft 12, centrifugal force generates a flow indicated by an arrow (81) on the water surface 64. This flow corresponds to a "river flowing radially from the center of rotation of the blades 50." Furthermore, if we look at the blade 50 on the left side of the drawing, we can see that this blade 50 moves from the back to the front of the drawing. The water pushed by the blade 50 escapes from the outer end 51 and inner end 52 of the blade 50. In particular, the water escaping from the inner end 52 passes through the water passage 53 formed between the blade 50 and the float housing 14, and appears to flow from the front to the back of the drawing. "Appears to flow" means that if we were to assume that the blade 50 were stationary, the water would appear to be flowing.

[0016] This flow in the water passage 53 promotes the flow indicated by the arrow (82). That is, the flow indicated by the arrow (82) is active because there is no obstruction above (disk 105 in Figure 1(a)), and this is further enhanced by the action of the water passage 53. As a result, the flow indicated by the arrow (82) is significantly larger than the flow indicated by the arrow (113) in Figure 1(a), and the water circulation performance is accordingly improved.

[0017] Based on the above findings, the present invention is as follows. The invention of claim 1 is a water purifying device that purifies water by floating and rotating blades that extend radially from a rotating shaft that is set up perpendicular to the water surface, and by raising a river that flows radially from the center of rotation of the blades on the water surface without splashing up the water on the surface, The water purification device includes a float disposed below the rotation shaft, a float housing surrounding the float and rotated by the rotation shaft, rods extending radially from the float housing, and the blades provided on the rods, A water passage for passing water pushed by the blades is provided between the blades and the floating body housing. [Effects of the Invention]

[0018] In the invention according to claim 1, a water passage is provided between the blades and the floating body housing, so the amount of circulating water increases compared to conventional water purification devices, improving the performance of the water purification device. That is, the present invention provides a structure that can improve the performance of a water purification device that rotates at an ultra-low speed. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1(a) is a diagram showing a comparative example, and FIG. 1(b) is a diagram showing an embodiment according to the present invention. [Figure 2] 1 is an exploded view of a water purification device according to the present invention. [Figure 3] (a) is a plan view of the rod and blades, and (b) is a cross-sectional view taken along line bb in (a). [Figure 4] 1 is a front view of a water purification device according to the present invention. [Figure 5]FIG. 1(a) is a plan view (partial view) of a pond in which a water purification device according to the present invention is floated, and FIG. 1(b) is an enlarged view of part b in FIG. [Figure 6] 1(a) to 1(c) are diagrams illustrating the operation of the water purification device. [Figure 7] 10(a) to 10(g) are diagrams illustrating modified examples. [Figure 8] FIG. 1 is a diagram illustrating the basic structure of a conventional water purification device. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment of the present invention will be described below with reference to the accompanying drawings. [Example]

[0021] To facilitate understanding of the water purification device 10 according to the embodiment, the components of the water purification device 10 will be described using an exploded view.

[0022] [Elements that make up a water purification system] As shown in Figure 2, the water purifier 10 comprises a motor with a reducer 13, a base 11, a boss plate 22 with a boss 21, an upper Y-shaped housing 15, a float 17, a lower Y-shaped housing 16, three rods 18, and three blades 50. For ease of drawing, only one blade 50 is shown, and the other two are omitted. The three blades 50 are shown in Figure 5(a) described below.

[0023] The number of blades 50 is arbitrary, but if there is only one blade, it will be difficult to maintain balance during turning. Although two wheels are an improvement over one, there is still some imbalance during cornering. When there are three blades 50 and the blades are arranged at a circumferential pitch of 120°, good balance is achieved during rotation. With four blades, the blades 50 are arranged at 90° intervals around the circumference, resulting in good balance during rotation. Therefore, although the number of blades 50 is optional, three (or four or more) is recommended.

[0024] Although not essential, it is preferable to add an arm 24 extending from the base 11, a float holder 25 attached to the end of the arm 24, a float 26, and a retaining ring 27.

[0025] [Motor with reducer] The motor with speed reducer 13 is a structure in which a gear type speed reducer with a reduction ratio of about 1:400 and an electric motor with a rated rotation speed of about 1500 revolutions per minute are integrated. Specifically, the input shaft of the gear reducer is made hollow, and the motor shaft of the electric motor is fitted onto this hollow shaft.

[0026] It is possible to fit a drive pulley onto the motor shaft, fit a driven pulley onto the input shaft of the gear reducer, and stretch a timing belt between the drive pulley and the driven pulley, but adopting a motor 13 with a reducer has the advantage of eliminating the drive pulley, driven pulley, and timing belt.

[0027] Furthermore, when a drive pulley, driven pulley, and timing belt are present, a waterproof cover is required to protect them, but this waterproof cover is large and has a complex structure. In this regard, the motor with speed reducer 13 has the advantage that the motor and speed reducer can be housed in a single housing, making waterproofing easy, and even if a waterproof cover is provided, this waterproof cover can be made small and simple in structure. Therefore, the motor 13 with a speed reducer is suitable for the water purifier 100 of the present invention, which is used outdoors and floated on the water surface.

[0028] The motor 13 with a speed reducer can be a geared motor in which the gears of the gear-type speed reducer are configured as spur gears or helical gears. Furthermore, the gears of the gear reducer may be planetary gears, so that the motor has a planetary gear reducer. The gear reducer may be a motor with a cycloid / trochoid reducer, in which the gear reducer is configured as a cycloid / trochoid reducer.

[0029] Structurally, the motor shaft and the reducer output shaft of a geared motor are misaligned perpendicular to the axis, so balance adjustment is required when installing the motor vertically. In contrast, motors with planetary gear reducers and motors with cycloidal-trochoidal reducers are preferable because the motor shaft and the reducer output shaft are on the same axis and are symmetrical about the vertical axis, making balance adjustment unnecessary (or easy). However, geared motors have the advantage of being cheaper than motors with planetary gear reducers or motors with cycloid / trochoid reducers. Therefore, the selection of the motor 13 with a speed reducer may be made appropriately.

[0030] Element Surface The base 11, the boss plate 22, the Y-shaped housing upper part 15, and the Y-shaped housing lower part 16 are preferably made of stainless steel, which has both strength and water resistance. The material of the floating body 17 is preferably foamed resin, particularly polystyrene foam (foamed styrene). The rod 18 and blades 50 are preferably made of polyvinyl chloride, which is lightweight and water-resistant. However, the material of each element may be changed or selected as appropriate.

[0031] [Assembly of Elements] The above-described components can be assembled in any manner, and one example will be described below. In the following description, the bolt is placed on top and the nut on the bottom, but the nut may also be placed on top and the bolt on the bottom. Also, although not described in the following description, a flat washer and a spring washer are interposed between the bolt and nut.

[0032] The float 17 is placed on the lower housing part 16. The upper housing part 15 is placed over this float 17. The upper housing part 15 is connected to the lower housing part 16 with a first bolt 31 and a nut 32. As a result, the float housing 14 consisting of the upper housing part 15 and the lower housing part 16 is completed. Because the float housing 14 is disassembled, if the float 17 is damaged, it can be easily replaced with a new float 17.

[0033] The reducer-equipped motor 13 is placed on the base 11 and the second bolt 33 is screwed into the reducer-equipped motor 13 to couple the reducer-equipped motor 13 to the base 11 . Next, the boss 21 is fitted onto the rotary shaft 12, which is the output shaft of the speed reducer motor 13, and the set screw 34 is tightened. In this way, the base 11, the speed reducer motor 13, and the boss plate 22 are integrated.

[0034] A third bolt 35 is welded to the housing upper portion 15 in advance so that the tip of the bolt is convex upward. Then, the boss plate 22 is placed on the housing upper part 15, and the nuts 36 are screwed onto the third bolts 35 to fix the boss plate 22 to the housing upper part 15. In this way, the base 11, the motor with speed reducer 13, the boss plate 22, the float housing 14, and the float 17 are integrated.

[0035] Next, the rod 18 is fixed to the housing lower part 16 with a fourth bolt 37 and a nut 38 . At an appropriate timing, the arm 24 is fixed to the base 11 with the fifth bolt 41 and nut 42, the float holder 25 is fixed to the arm 24 with the sixth bolt 43 and nut 44, the float 26 is fitted into the float holder 25, and the retaining ring 27 is attached.

[0036] As shown in Fig. 3(a), a blade 50 is attached to the tip of a rod 18. Preferably, a plate 60, a reinforcing plate 61, and a reinforcing angle 62 are added.

[0037] As shown in FIG. 3(b), the blades 50 are fixed to the rod 18 by welding. The blade 50 is made up of an upper flange 54, a lower flange 55 and a web 56 connecting these together, and is a channel that opens forward in the traveling direction.

[0038] Preferably, a plate 60 is attached to the lower flange 55. The width Wp of this plate 60 (front-rear width in the direction of travel) is set to 6 to 12 times, preferably 8 to 10 times the width Wf of the lower flange 55. To prevent the plate 60 from swinging up and down, a reinforcing plate 61 is hung from the pole 18, and furthermore, the plate is reinforced with a reinforcing angle 62.

[0039] [Water purification equipment] The water purification device 10 after assembling the above elements is as shown in FIG. As shown in Fig. 4, the float 17 allows the water purification device 10 to float on the water surface 64. At this time, the water surface 64 and the upper flange 54 of the blade 50 are flush (including almost flush).

[0040] The base 11 is pulled by a wire (FIG. 5, reference numeral 19) and does not rotate around the rotation axis 12. Therefore, when the motor with reducer 13 is put into operation, the rotating shaft 12 rotates at a predetermined rotational speed (3 to 6 revolutions per minute), and this rotating shaft 12 rotates the float housing 14 and the float 17, causing the rod 18 and the blade 50 to rotate.

[0041] The water purification device 10 described above can be installed in any water body with very little or no current, such as a large aquarium, pond, marsh, lake, estuary, or inlet. A specific example of installation in a pond will be described below.

[0042] [pond] 5(a) shows only a part of the pond 65 for ease of drawing. As shown in FIG. 5(b), a wire stopper 66 is provided on the edge of the pond 65. 5(a), the water purification device 10 according to the present invention is floated in a pond 65, and the wires 19 are strung between the base 11 and the wire stopper 66. The number of wires 19 is arbitrary, but three is preferable.

[0043] One of the wires is tied to the tip of an arm 24, not to the base 11. The arm 24 acts to prevent the base 11 from rotating. The arm 24 also has a float 26 at its tip. Therefore, the arm 24 also serves to prevent the water purification device 10 from rolling.

[0044] After operating the water purification device 10 for a certain period of time, the position of the water purification device 10 can be changed by changing the length of the wire 19. By repeating this process, the large pond 65 can be purified evenly.

[0045] Alternatively, the wire 19 may be removed and an anchor attached to the float 26. The anchor will fix the position of the float 26. The water purification device 10 will float around the float 26. This drifting allows the pond 65 to be purified more evenly.

[0046] In addition, in FIG. 5(a), the wire 19 may be removed, three arms 24 may be extended from the base 11 at a pitch of 120°, and a float 26 may be provided at the tip of each of these arms 24. Therefore, it is possible to choose to use the water purification device 10 in any of the following ways: by pulling the wire 19 to fix its position, by omitting the wire 19 and rotating the water purification device 10, or by omitting the wire 19 and floating the water purification device 10.

[0047] [Water purification device function] The operation of the water purification device 10 according to the present invention was briefly described above with reference to FIG. 1(b), and the first to third operations of the water purification device 10 will now be described in detail with reference to other drawings.

[0048] [First action] In Figure 6(c), the region Wc between the housing upper part 15 and the blades 50 is substantially open in the vertical direction, with only the elongated rod 18 present, so the upward flow (arrow (82)) is not impeded but encouraged.

[0049] [Second effect] As shown in FIG. 6(a), the blades 50 rotate as indicated by the white arrows. As shown in Figure 6(b), the upper flange 54 of the blade 50 is flush with (or nearly flush with) the water surface 64, and the lower flange 55 is submerged in water. When the blade 50 pushes against the water, the water tries to move up and down and left and right (front to back directions in the drawing) parallel to the web 56. However, the upper flange 54 prevents the water from moving upward, and the lower flange 55 prevents the water from moving downward. Therefore, the channel-shaped blade 50 plays a role in grabbing the water and preventing it from escaping.

[0050] As a result, in FIG. 6(c), water actively escapes from the outer end 51 and the inner end 52 of the blade 50. Focus on the water escaping from the inner end 52. This water passes through the area Wc formed between the blade 50 and the float housing 14, and apparently escapes away from the drawing surface. Therefore, the area Wc becomes a water passage 53. As if triggered by this escape, the upward flow (arrow (82)) becomes even stronger.

[0051] [Third Action] The first and second effects described above can be obtained even without the plate 60 shown in Fig. 6(b). However, since the plate 60 provides the third effect described below, it is recommended to provide the plate 60. In Figure 6(b), the area above the plate 60 momentarily becomes a water-free space 67. Then, when the plate 60 moves as indicated by the white arrow, the original water-free space 67 is filled with water. The water below the plate 60 moves upward by the amount of water that fills the water-free space 67. This movement is called the third effect.

[0052] However, this phenomenon is difficult to achieve if the water around the plate 60 is turbulent. Therefore, the plate 60 is placed parallel to the water surface 64. When placed parallel, the plate 60 acts similarly to a fish's fin and does not cause turbulence in the water. As a result, the third effect is achieved.

[0053] Moreover, the larger the water-free space 67, the stronger the third effect. Because the size of the water-free space 67 is proportional to the width Wp of the plate 60, the width Wp of the plate 60 is set to at least six times the width Wf of the lower flange 55. If the width Wp is six times or more, a sufficiently large third effect can be obtained. However, if the width Wp exceeds 12 times, it becomes difficult to maintain the rigidity of the plate 60, and the tip of the plate 60 will swing up and down, disturbing the water. As a result of the above, the width Wp of the plate 60 is set in the range of 6 to 12 times the width Wf of the lower flange 55 .

[0054] [Example of changing the blade] The mounting configuration of the blades 50 explained in Fig. 3(b) can be modified. Modified examples will be explained with reference to Figs. 4(a) to 4(g).

[0055] As shown in FIG. 7( a ), a channel-shaped blade 50 may be attached to a rod 18 made of a round tube, and a triangular bracket 69 may be placed between the blade 50 and the rod 18 . 7(b), a channel-shaped blade 50 may be attached to a rod 18 made of a square tube, and a triangular bracket 69 may be placed between the blade 50 and the rod 18.

[0056] With the structure of FIG. 7(a) or FIG. 7(b), the third effect described above is not achieved, but the first and second effects are achieved. The structures of FIGS. 7(a) and 7(b) have the advantage of being simple and inexpensive because they do not include the plate 60 and reinforcing plate 61 shown in FIG. 3(b).

[0057] 7(c), an inverted L-shaped blade 50 may be attached to a rod 18 made of a round tube, and a triangular bracket 69 may be placed between the blade 50 and the rod 18. An upper flange 54 can prevent water from escaping upward. 7(d), an inverted L-shaped blade 50 may be attached to a rod 18 made of a square tube, and a triangular bracket 69 may be placed between the blade 50 and the rod 18. An upper flange 54 can prevent water from escaping upward.

[0058] With the structure of FIG. 7(c) or FIG. 7(d), the second and third effects described above are not exhibited, but the first effect is exhibited. The structures of Figures 7(c) and 7(d) have the advantage of being simpler and less expensive because they do not include the bottom flange 55 shown in Figures 7(a) and 7(b).

[0059] 7(e), an I-shaped blade 50 may be attached to a rod 18 made of a round tube, and a triangular bracket 69 may be placed between the blade 50 and the rod 18. 7(f), an I-shaped blade 50 may be attached to a rod 18 made of a square tube, and a triangular bracket 69 may be placed between the blade 50 and the rod 18.

[0060] With the structure of FIG. 7(e) or FIG. 7(f), the second and third effects described above are not exhibited, but the first effect is exhibited. Furthermore, the structures of Figures 7(e) and 7(f) do not include the upper flange 54 shown in Figures 7(c) and 7(d), and therefore have the advantage of being even simpler and less expensive.

[0061] Also, as shown in FIG. 7( g ), a channel-shaped blade 50 may be attached to a rod 18 made of a square tube, a plate 60 may be extended from the bottom of the blade 50, and a triangular bracket 69 may be placed between this plate 60 and the rod 18 . The structure of FIG. 7(g) exerts all of the first to third effects described above. 7(g), there is an advantage that the reinforcing plate 61 shown in FIG. 3(b) is not necessary and the reinforcing angle 62 can be replaced with a simpler triangular bracket 69.

[0062] However, although square tubes have the advantage that it is easier to attach the blades 50 to them than round tubes, square tubes have the disadvantage that they are less available on the market than round tubes, are somewhat more difficult to obtain, and are more expensive. Taking into consideration the advantages and disadvantages, it is possible to select whether the rod 18 is a round tube or a square tube. Therefore, the rod 18 is not limited to a round tube.

[0063] Based on the above explanation, the present invention can be summarized as follows. As shown in FIG. 4, the water purifying device 10 purifies water by rotating blades 50 that extend radially from a rotation shaft 12 that is set up perpendicular to the water surface 64 on the water surface 64, floating on the water surface 64, and causing streams that flow radially from the center of rotation of the blades 50 to rise above the water surface without splashing up the water on the water surface 64. The water purification device 10 includes a float 17 disposed below the rotating shaft 12, a float housing 14 surrounding the float 17 and rotated by the rotating shaft 12, a rod 18 extending radially from the float housing 14, and the blades 50 provided on the rod 18. A water passage 53 for passing water pushed by the blades 50 is provided between the blades 50 and the floating body housing 14.

[0064] In this case, the blades 50 may be attached in either the form shown in FIG. 3(b) or the form shown in FIGS. 7(a) to (g).

[0065] Preferably, as shown in Figure 6(b), the blade 50 is a channel consisting of an upper flange 54, a lower flange 55 and a web 56 connecting them, which opens forward in the direction of travel, and is characterized in that the upper flange 54 is placed on the water surface 64 and the lower flange 55 is placed underwater, and the upper flange 54 and the lower flange 55 act to grab the water on the water surface 64.

[0066] The upper flange 54 prevents water from escaping upward, and the lower flange 55 prevents water from escaping downward. In this case, the blades 50 may be attached in any of the forms shown in FIG. 3(b), FIG. 7(a), FIG. 7(b), and FIG. 7(g).

[0067] Preferably, as shown in FIG. 6(b), the lower flange 55 includes a plate 60 extending rearward in the traveling direction along the water surface 64.

[0068] The plate 60 extends along the water surface 64 and therefore moves beneath the water surface without disturbing the water below. In this case, the blades 50 may be attached in either the form shown in FIG. 3(b) or the form shown in FIG. 7(g).

[0069] The configuration (structure) of the water purification device 10 according to the present invention is not limited to the embodiment, and may be modified as appropriate as long as the functions and effects of the present invention are achieved. [Industrial Applicability]

[0070] The present invention is suitable for use in a water purification device for purifying ponds, marshes, lakes, estuaries, inlets, and the like. [Explanation of symbols]

[0071] 10...water purification device, 11...base, 12...rotating shaft, 13...motor with reducer, 14...float housing, 15...upper housing, 16...lower housing, 17...float, 18...rod, 19...wire, 50...vane, 51...outer end, 52...inner end, 53...water passage, 54...upper flange, 55...lower flange, 56...web, 60...plate, 61...reinforcing plate, 62...reinforcing angle, 64...water surface, 65...pond, Wf...width of lower flange, Wp...width of plate.

Claims

1. A water purifying device that purifies water by floating and rotating blades that extend radially from a rotating shaft that is set up perpendicular to the water surface, and by raising a river that flows radially from the center of rotation of the blades on the water surface without splashing up the water on the surface, The water purification device includes a float disposed below the rotation shaft, a float housing surrounding the float and rotated by the rotation shaft, rods extending radially from the float housing, and the blades provided on the rods, A water purification device characterized in that a water passage for passing water pushed by the blades is provided between the blades and the floating body housing.

2. The water purification device according to claim 1, The blade is a channel consisting of an upper flange, a lower flange and a web connecting them, which opens forward in the direction of travel, and the upper flange is placed on the water surface and the lower flange is placed underwater, and the upper flange and the lower flange act to grab water on the surface of the water.

3. The water purification device according to claim 2, The water purification device is characterized in that the lower flange has a plate extending rearward in the direction of travel along the water surface.

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