JP2016005448A - Floating matter removal intake apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intake apparatus capable of efficiently removing, despite its small size, floating matter near the water surface, and easy to clean inside thereof.SOLUTION: A water intake apparatus 34 is provided with an intake part 42 positioned in water. The intake part 42 includes: a trunk cylinder 46 in a cylindrical shape fixed in water and vertically extending; an upper cylinder 48 in a thin cylindrical shape detachably fitted to the trunk cylinder 46 from above; and a float 50 fixed inside the upper cylinder 48, the upper end of the float being positioned lower than the upper end of the upper cylinder 48. By the float 50, according to the water level change inside the intake part 42, the upper cylinder 48 is allowed to vertically move fitted to the trunk cylinder 46. When water is discharged from the intake part 42, the upper cylinder 48 moves downward as the water level inside the intake part 42 goes down, water flows into the intake part 42 from the upper side of the upper cylinder 48.

Description

  The present invention relates to a water intake device for removing floating matters on a water surface.

  In recent years, aquariums for breeding aquatic organisms such as tropical fish and aquatic plants have become widespread. The water in the aquarium box becomes dirty over time due to food left over by aquatic organisms and excrement of aquatic organisms. Aquatic organisms cannot survive in this tank as they are. In order to purify water, many water tanks are provided with a water intake device, a filter and a pump in addition to the water tank box. In this water tank, the water intake device takes in dirty water from the water tank box. The taken-in water is filtered with a filter. The water from which dirt has been removed by filtration is returned to the aquarium box. A pump is used to achieve this water flow. The pump may be provided in the water intake device. The filter may be equipped with a pump.

  Water tanks having various water purification functions have been developed for aquatic organisms. FIG. 6 is a conceptual diagram of a general upper filtration water tank 2. In this water tank 2, the water intake device 4 is submerged near the bottom of the water tank box 6. This water intake device 4 has a water intake and a pump. The filter 8 is mounted on the aquarium box 6. Water in the aquarium box 6 is sucked from the water intake device 4. This water is sent to the filter by the pump of the water intake device 4. This water is filtered with a filter. The water from which dirt has been removed by filtration is returned to the water tank box 6. The arrows in the figure represent the flow of water. A study on an upper filtration purification device is reported in Japanese Patent Laid-Open No. 10-304788.

  FIG. 7 is a conceptual diagram showing a general overflow tank 12. In this water tank 12, the water intake device 14 is a normal pipe. The filter 18 is attached below the aquarium box 16. The water overflowing from the water tank box 16 is stored in the filter 18 by natural flow from the water intake. A pump 20 is located behind the filter 18. The water filtered by the filter 18 is returned to the water tank box 16 by the pump 20. The same amount of water sent by the pump 20 overflows and flows down to the filter 18. The arrows in the figure represent the flow of water. A study on an overflow tank is reported in Japanese Patent Application Laid-Open No. 2002-78433.

  Japanese Patent Application Laid-Open No. 2006-166885 reports a water intake device that can take surface and deep water for a water tank. In this water intake device, a float having air inside is put on the upper edge of the water intake device main body. This float floats on the water inside the intake section. When the water in the water intake main body is discharged and the water level inside the water intake main body is lowered, the float also moves downward, so that the water in the water tank box flows into the water intake main body from the upper side of the float.

  JP-A-1-236987 reports a water collecting device for taking surface water for a large aquarium such as a pool. In this water collecting apparatus, a movable part is slidably placed on the upper side of the support member. The support member and the movable part are connected by a flexible sheet member. The movable part floats in the water inside the device. When the water in the apparatus is discharged, the movable part moves downward, and the water in the water tank flows into the apparatus from the upper side of the movable part.

JP-A-10-304788 JP 2002-78433 A JP 2006-166885 A JP-A-1-236987

  In dirty water, there are many garbage and oil floating near the water surface. In the upper filtration water tank 2 of FIG. 6, since the water intake device 4 is submerged in water, it is not possible to remove dust floating near the water surface. In order to remove debris floating near the water surface, the water intake device 4 may be positioned near the water surface. However, the water in the aquarium box 6 evaporates naturally. If the user does not always pay sufficient attention, the water intake device 4 may come out of the water surface. This makes it impossible to remove the dirt. Further, this causes the pump of the water intake device 4 to idle. This can cause damage to the pump.

  In the overflow type water tank 12 of FIG. 7, as described above, the water overflowed from the water tank box 16 is taken into the filter 18 by free flowing. In this method, water near the water surface can be taken. However, if the total amount of water in the water tank decreases and the intake port comes out of the surface of the water, the circulation of water stops and dirt cannot be removed. As a result, the pump 20 idles and causes damage. Further, the amount of water flowing into the filter 18 varies greatly depending on the position of the water surface. Furthermore, water flows into the filter 18 even when the pump 20 is stopped. In order to cope with this change in the amount of water and the stop of the pump 20, the size of the overflow type filter 18 needs to be increased. The size and weight of the water tank 12 are larger than those of the upper filtration method.

  The water intake tool disclosed in Japanese Patent Application Laid-Open No. 2006-166885 takes in water from the tank box from above the float. Since this float contains air, its width is wider than the thickness of the water intake main body. The upper side of this float is wide. When using this device to take in floating matter on the surface of the water together with water, the floating matter that has flowed with water tends to stay on the upper side of the float. In particular, relatively large suspended matter is caught on the upper side of the float. In the water intake device disclosed in Japanese Patent Application Laid-Open No. 2006-166885, it is possible that suspended matter accumulates on the upper side of the float and the suspended matter cannot be removed effectively.

  In the water intake device disclosed in JP-A-1-236987, the support member and the movable portion are connected by a flexible sheet member. In this apparatus, since water is taken from the upper side of the movable part, floating substances are likely to adhere particularly to the inner side of the movable part. The adhering floating substance can hinder the sliding operation of the movable part. Further, if dust or oil adheres to the hair catcher for dust removal provided at the overflow port, the water intake capacity is reduced due to clogging. For this reason, it is necessary to clean the inside of the movable part at regular intervals. However, since this movable part is connected with the support member by the sheet, cleaning is difficult. In order to clean the movable part, it is necessary to remove the sheet member. This device takes time to clean.

  An object of the present invention is to provide a water intake device that can efficiently remove suspended matters near the water surface in a small size and is easy to clean. By applying this water intake device to an aquatic aquarium, the aforementioned problems can be solved. Furthermore, this water intake device is also intended to be applied to other uses such as bathtubs and pools, as well as removal of oil films and floating substances floating on the sea surface.

  The water intake device according to the present invention includes a water intake portion located in water. The water intake section is fixed in water and has a cylindrical body that extends vertically, an upper cylinder that is detachably fitted into the cylindrical cylinder and has a thin cylindrical shape, and is fixed to the inside of the upper cylinder. It is equipped with uki. Due to the above, the upper cylinder can be moved up and down while being fitted into the barrel in accordance with the change in the water level inside the intake section. When water is discharged from the water intake, the upper cylinder moves downward due to a drop in the water level inside the water intake, and water flows into the water intake from the upper side of the upper cylinder.

  Preferably, the upper end of the upper cylinder is rounded upwardly convex.

  Preferably, the ratio (W / D) of the thickness W of the upper cylinder to the outer diameter D of the upper cylinder is 0.08 or less.

  Preferably, the intake section further includes a lower cylinder positioned below the trunk cylinder. The cylinder and the lower cylinder are connected so that the length from the upper end of the cylinder to the lower end of the lower cylinder can be expanded and contracted.

  Preferably, the upper end of the base is located below the upper end of the upper cylinder.

  Preferably, when the height from the upper end of the base to the upper end of the upper cylinder is H, the ratio (H / D) of the height H to the outer diameter D of the upper cylinder is 0.1 or more. .

  Preferably, the above-mentioned uki is one in which air is confined in a closed space.

  Preferably, when the upper cylinder is fitted into the trunk cylinder, a seal is located between the upper cylinder and the trunk cylinder.

  Preferably, the device is for an aquarium for aquatic organisms.

  The water tank according to the present invention includes a water tank box, a water intake part located in the water tank box, a pump connected to the water intake part and sucking water in the water intake part, and a water connected to the pump and sucked by the pump. And a filter for filtering. The water intake section is fixed in water and has a cylindrical body that extends vertically, an upper cylinder that is detachably fitted into the cylindrical cylinder and has a thin cylindrical shape, and is fixed to the inside of the upper cylinder. It is equipped with uki. The upper cylinder can be moved up and down while being fitted in the barrel according to a change in the water level inside the water intake section. When the pump is operated and water is sucked from the water intake unit, the water level in the water intake unit is lowered, so that the upper cylinder moves downward, and water flows into the water intake unit from the upper side of the upper cylinder. The water sent out from the filter is returned to the water tank box.

  In the water intake device according to the present invention, the water intake section includes a cylindrical body cylinder, an upper cylinder that is fitted into the cylinder cylinder from above, and has a thin cylindrical shape, and a wall that is fixed to the inside of the upper cylinder. I have. When the water level in the water intake section is lowered by discharging the water in the water intake section, the upper cylinder moves downward, and water flows into the water intake section from the upper side of the upper cylinder. In this water intake tool, the upper cylinder stops at a position where the amount of water flowing in and the amount of water discharged are balanced. In this water intake device, since water flows from above the upper cylinder, only surface water can be sucked. In this water intake device, since water flows from above the thin upper tube, floating substances are prevented from being caught on the upper side of the upper tube during water intake. With this water intake device, suspended matter near the water surface is efficiently removed. In this water intake device, since the upper cylinder is stationary at a position where the amount of water flowing into the water intake device and the amount of water to be discharged are balanced, a constant amount of water is always discharged regardless of the position of the water surface. In this water intake device, it is not necessary to worry about the idling of the pump due to the change in the position of the water surface. In this water intake device, it is not necessary to increase the size of the filter. With this water intake device, suspended matter near the water surface can be efficiently removed with a small size.

  Furthermore, in this water intake device, the upper cylinder is detachably fitted to the trunk cylinder. This upper cylinder can be removed from the barrel. The upper cylinder can be removed to clean the upper cylinder. This water intake device is easy to clean.

FIG. 1 is a cross-sectional view of a water tank provided with a water intake device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a water intake portion of the water intake device of FIG. 1. FIG. 3 is an enlarged cross-sectional view showing a part of the water intake portion of the water intake device of FIG. 1. 4 is a cross-sectional view illustrating a water intake portion of the water intake device of FIG. 1 when the pump is stopped. FIG. 5 is an enlarged view showing a part of the water intake section of the water intake device of FIG. 1. FIG. 6 is a schematic view showing a water tank provided with a conventional water intake device. FIG. 7 is a schematic view showing a water tank provided with another conventional water intake device.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

  The water tank 32 provided with the water intake device 34 which concerns on this invention is shown by FIG. The water tank 32 includes a water tank box 36, a water intake device 34, a filter 38 with a pump, a water absorption pipe 40, and a water supply pipe 41. This water tank 32 is for aquatic organisms. The arrows in the figure represent the flow of water.

  The aquarium box 36 stores water. Aquatic organisms inhabit this water. The aquarium box 36 is usually transparent on the front, back and both sides so that aquatic life can be appreciated. A typical material for the aquarium box 36 is glass. The water tank box 36 may be made of a synthetic resin.

  The water intake device 34 includes a water intake unit 42. The water intake section 42 is located in the water tank box 36. The water intake section 42 has a weight 56 (see FIG. 2) as will be described later, so that it does not move relative to the aquarium box 36. The water in the aquarium box 36 is taken from the water intake section 42.

  The filter 38 with the pump is located outside the water tank box 36. Although not shown, the filter 38 with a pump includes a pump and a main body. The pump sucks water in the water intake unit 42. The main body filters the water sucked by the pump. Thereby, the dirt of the sucked water is removed. The water from which the dirt has been removed is returned to the aquarium box 36. In FIG. 1, the pump and the main body are integrally formed.

  The water absorption pipe 40 connects the water intake part 42 and the filter 38 with a pump. The water sucked from the water intake section 42 by the pump is sent to the filter 38 with a pump through the water absorption pipe 40.

  The water pipe 41 connects the water tank box 36 and the filter 38 with a pump. The water whose dirt is removed by the main body is returned to the water tank box 36 through the water pipe 41.

  FIG. 2 shows a cross-sectional view of the water intake section 42. The water intake section 42 includes a lower cylinder 44, a trunk cylinder 46, an upper cylinder 48, a seal 49, a screen 51, and a base 50. The arrows in the figure represent the flow of water

  The lower cylinder 44 includes a cylinder part 52, a plate part 54, and a weight 56. The cylinder part 52 is cylindrical. The cylinder portion 52 extends in the up-down direction. A hole 58 is opened on the side surface of the cylindrical portion 52. The water absorption pipe 40 is connected to the hole 58. A screw 60 is threaded on the upper side of the outer surface of the cylindrical portion 52. The plate portion 54 is located below the tube portion 52. The lower end of the cylindrical portion 52 is fixed to the upper surface of the plate portion 54. A weight 56 is further fixed to the upper surface of the plate portion 54. Due to the weight 56, the lower cylinder 44 is sunk in the bottom of the water tank box 36. Thereby, the lower cylinder 44 does not move with respect to the aquarium box 36. In other words, the lower cylinder 44 is fixed to the water tank box 36 by the weight 56.

  The barrel 46 is cylindrical. The trunk cylinder 46 is positioned on the lower cylinder 44. The inner diameter of the barrel 46 and the outer diameter of the lower cylinder 44 are substantially the same. A screw 62 is threaded below the inner surface of the barrel 46. The screw 62 of the body cylinder 46 and the screw 60 of the lower cylinder 44 are provided so as to mesh with each other. By rotating the trunk cylinder 46 with the lower end of the trunk cylinder 46 aligned with the upper end of the lower cylinder 44, the trunk cylinder 46 moves downward. The upper end of the lower cylinder 44 enters the inside of the trunk cylinder 46. As a result, the barrel 46 is connected to the lower cylinder 44. The body cylinder 46 is fixed to the water tank box 36 via the lower cylinder 44. By further rotating the barrel 46, the barrel 46 moves further downward. By rotating the barrel 46 in the reverse direction, the barrel 46 moves upward. The trunk cylinder 46 and the lower cylinder 44 are connected so that the length from the upper end of the trunk cylinder 46 to the lower end of the lower cylinder 44 can be expanded and contracted.

  The upper cylinder 48 is cylindrical. As shown in FIG. 2, the upper cylinder 48 is fitted into the trunk cylinder 46 from above. The upper side of the trunk cylinder 46 enters the upper cylinder 48. The inner diameter of the upper cylinder 48 is slightly larger than the outer diameter of the trunk cylinder 46. When the upper cylinder 48 is fitted into the trunk cylinder 46, a gap exists between the inner surface of the upper cylinder 48 and the outer surface of the trunk cylinder 46. Therefore, the upper cylinder 48 can be moved up and down while being fitted in the trunk cylinder 46. By moving the upper cylinder 48 upward, the upper cylinder 48 can be removed from the trunk cylinder 46. The upper cylinder 48 is detachably fitted to the trunk cylinder 46.

  FIG. 3 is an enlarged cross-sectional view showing a part of the upper cylinder 48. As shown in the figure, the upper end 64 of the upper tube 48 is rounded upward. A double arrow W represents the thickness of the upper cylinder 48. The thickness W is measured at a portion of the upper cylinder 48 that is not rounded. A double-headed arrow D is the outer diameter of the upper cylinder 48. The upper cylinder 48 is thin. The upper cylinder 48 is thin. Here, that the upper cylinder 48 is thin means that the ratio (W / D) of the thickness W to the outer diameter D is 0.1 or less.

  As shown in FIG. 3, the thickness of the upper cylinder 48 is typically constant. The thickness of the upper cylinder 48 may not be constant. In this case, the thickness W of the upper cylinder 48 means the thickness at the upper end of the upper cylinder 48.

  As shown in FIG. 3, typically, the shape of the upper cylinder 48 is a cylindrical shape. The shape of the upper tube need not be cylindrical. For example, the upper cylinder may be a cylinder having a square cross section. When the upper cylinder is not cylindrical, the outer diameter D of the upper cylinder represents the maximum width of the upper cylinder.

  The seal 49 shown in FIG. 2 is located on the upper portion of the barrel 46. The seal 49 is wound around the outer surface of the barrel 46. When the upper cylinder 48 is fitted into the trunk cylinder 46, the seal 49 is positioned between the upper cylinder 48 and the trunk cylinder 46. The seal 49 reduces the amount of water that enters from the gap between the inner surface of the upper cylinder 48 and the outer surface of the trunk cylinder 46. The seal 49 is provided in a size that does not prevent the upper cylinder 48 from moving up and down.

  The screen 51 is net-like. The screen 51 covers the upper surface of the barrel 46. The screen 51 is detachably put on the cylinder 46. The screen 51 prevents large garbage or fish that has accidentally entered the water intake device from entering the water absorption pipe 40.

  The base 50 is attached to the inner surface of the upper cylinder 48. The base 50 is detachably attached to the inner surface of the upper cylinder 48. Uki 50 is spherical. Uki 50 constitutes a closed space containing air inside. The air 50 has buoyancy due to this air. When the water level in the water intake section 42 rises above the position of the ground 50, the ground 50 can float the upper cylinder 48. Since the base 50 floats the upper cylinder 48, the upper end of the upper cylinder 48 is located above the water surface in the water intake portion 42.

  In FIG. 3, a double-headed arrow H is a height with the upward direction from the upper end of the base 50 to the upper end of the upper cylinder 48 being positive. As shown in the drawing, the upper end of the base 50 is located below the upper end of the upper cylinder 48. In other words, the height H is greater than zero. The ground 50 floats only on the water in the water intake section 42. The buoyancy of the ground 50 is not affected by the water level in the aquarium box 36 outside the water intake section 42.

  Hereinafter, the operation of the water intake device 34 will be described.

  FIG. 4 shows a state in which water is put into the aquarium box 36 without operating the pump. Although the seal 49 is mounted, since there is still a slight gap between the upper cylinder 48 and the trunk cylinder 46, when the water level is above this gap, water enters the water intake section 42 from this gap. Thereby, the water level in the intake part 42 rises. When the water level in the water intake section 42 rises to the position of the ground 50, the ground 50 floats on the water. The upper cylinder 48 is lifted by the buoyancy of the ground 50. Eventually, the water level in the water intake section 42 and the water level in the water tank box 36 become the same. As shown in FIG. 4, at this time, the upper end 64 of the upper tube 48 protrudes upward from the water surface.

  When the pump is operated, water in the water intake section 42 is sucked through the water suction pipe 40. Thereby, the water level in the intake part 42 falls. As the water level in the water intake section 42 decreases, the upper cylinder 48 moves downward due to its own weight. When the upper end 64 of the upper cylinder 48 becomes lower than the water level in the water tank box 36, water enters the water intake portion 42 from the upper side of the upper cylinder 48. Floating substances on the water surface enter the intake section 42 together with water. FIG. 5 shows a state where water enters from the upper side of the upper cylinder 48. When the amount of water entering the intake portion 42 and the amount of water sucked by the pump from the intake portion 42 are balanced, the water level in the intake portion 42 becomes constant. The upper cylinder 48 stops at this position. FIG. 2 shows the water intake section 42 in this state.

  The water sucked by the pump from the water intake section 42 is passed through a filter. Here, dirt is removed. The water from which the dirt is removed is returned to the water tank box 36 through the water pipe 41.

  Hereinafter, the function and effect of the present invention will be described.

  As described above, the water intake device 34 takes water in the water tank box 36 from the upper side of the upper cylinder 48. In this water intake device 34, only surface water can be sucked. As a result, garbage floating near the water surface is taken into the water intake section 42. The water intake device 34 can remove dust floating near the water surface of the water tank box 36.

  As described above, in the water intake device 34, the upper tube 48 is thin. The upper cylinder 48 is thin. The suspended matter that has flowed with the surface water easily reaches the inside of the upper cylinder 48. Even a relatively large suspended substance easily reaches the inside of the upper cylinder 48. As the water falls into the upper cylinder 48, the tip of the suspended matter is drawn into the upper cylinder 48. The suspended matter is drawn into the upper cylinder 48. Furthermore, since the upper cylinder 48 is thin, the friction between the suspended matter and the upper side of the upper cylinder 48 is small. Even if it is a relatively large floating substance, it easily gets over the upper side of the upper cylinder 48. In the upper cylinder 48, floating substances are prevented from accumulating on the upper side of the upper cylinder 48. In this water intake device 34, floating substances near the water surface are efficiently removed.

  As described above, the ratio (W / D) of the thickness W of the upper cylinder 48 to the outer diameter D of the upper cylinder 48 is 0.1 or less. From the viewpoint of more effectively preventing floating matter from being caught by the upper cylinder 48, the ratio (W / D) is more preferably 0.08 or less, and further preferably 0.06 or less. From the viewpoint of the strength of the upper cylinder, this ratio is preferably 0.001 or more.

  The thickness W is preferably 5 mm or less. By setting the thickness W to 5 mm or less, the suspended matter is effectively prevented from being caught by the upper cylinder 48. In this respect, the thickness W is more preferably 4 mm or less, and further preferably 3 mm or less. From the viewpoint of the strength of the upper cylinder, the thickness W is preferably 0.1 mm or more.

  As described above, the upper end of the upper cylinder 48 is rounded upward. Since the upper end of the upper cylinder 48 is rounded so as to protrude upward, it is possible to more effectively prevent floating substances from being caught on the upper cylinder 48.

  As described above, in this water intake device 34, the upper cylinder 48 is stationary at a position where the amount of water entering the water intake portion 42 and the amount of water sucked from the water intake portion 42 by the pump are balanced. Even if the water level in the aquarium box 36 changes, the position of the upper cylinder 48 changes so as to maintain this balance. In this water intake device 34, even if the water level in the water tank box 36 changes, a constant amount of water can always be taken. In the water intake device 34, the water intake port does not come out of the water surface even if the water level drops. There is no need to worry about the idle rotation of the pump due to changes in the water surface. In this water intake device 34, it is not necessary to increase the size of the filter.

  In a water intake device that takes in water near the surface of the water, suspended matter tends to adhere to the inside of the water intake. In a water intake device in which the water intake port is movable according to the position of the water surface, floating substances attached to the movable part can be a factor that hinders the movement of the movable part. In addition, when a dust removal screen is provided inside the water intake, dust or oil adheres to the screen, resulting in clogging and reduced water intake capacity. In addition, dust may adhere to the wall located inside the movable part. The movable part needs to be cleaned at regular intervals. Screens and screens need to be cleaned at regular intervals. In the conventional water intake device, since the movable part is connected to the main body, it is difficult to clean the movable part and the screen and the ground located inside the movable part.

  In this water intake device 34, the upper cylinder 48 is detachably fitted to the trunk cylinder 46. The upper cylinder 48 can be removed from the trunk cylinder 46. Only the upper cylinder 48 can be removed and the upper cylinder 48 can be cleaned. The upper cylinder 48 can be cleaned without removing the barrel 46 and the lower cylinder 44 from the water tank box 36. Cleaning of the water intake device 34 is easy.

  In the water intake device 34, the upper cylinder 48 can be removed from the trunk cylinder 48, so that the screen 51 placed on the trunk cylinder 48 can be easily cleaned. Further, the screen 51 is detachably placed on the barrel 46. After the upper cylinder 48 is removed from the trunk cylinder 46, the screen 51 can be removed from the trunk cylinder 46. The screen 51 is easier to clean.

  In this water intake device 34, the ground 50 is detachably attached to the inner surface of the upper tube 48. The floor 50 can be removed from the upper tube 48 for cleaning. The upper cylinder 48 and the floor 50 are easy to clean.

  As described above, in the water intake device 34, the length from the upper end of the trunk cylinder 46 to the lower end of the lower cylinder 44 can be expanded and contracted. This length can be adjusted according to the height of the aquarium box 36. This water intake device 34 can be applied to water tanks of various sizes.

  In order to adjust the height of the water intake device, a method can be considered in which not only the upper cylinder but also the trunk cylinder is floated. In this method, the barrel is fitted so that it can move up and down with respect to the lower cylinder. For example, when the water surface is low in an aquarium box with a low height, Uki floats only the upper cylinder. When the water level is high in a high tank box, Uki floats the upper cylinder and the barrel. As shown in FIG. 2, after adjusting the length from the upper end of the barrel 46 to the lower end of the lower barrel 44, the barrel 46 is preferably fixed to the lower barrel 44. In other words, it is preferable that only the upper cylinder 48 has the float 50 floating. Thereby, even if the position of the water surface fluctuates, the load applied to the ground 50 is constant. Compared with the method in which the upper cylinder 48 and the barrel 46 are floated by the uki 50, the size of the uki 50 can be reduced. Thereby, it is suppressed that a suspended | floating matter gets caught in the uki50.

  When it is not necessary to adjust the length of the water intake unit, the water intake unit may not include the lower cylinder. The water intake section includes a trunk cylinder, an upper cylinder, and a base. In this case, the barrel is located at the bottom of the aquarium box. The barrel is fixed to the aquarium box. The water absorption pipe is connected to the barrel.

  As described above, the upper end of the base 50 is located below the upper end of the upper cylinder 48. For this reason, the floating material that has passed over the upper side of the upper cylinder 48 falls from the upper side to the lower side. As a result, the suspended matter is prevented from being caught on the upper side of the upper cylinder 48 and the base 50.

  The ratio (H / D) of the height H from the upper end of the base 50 to the upper end of the upper cylinder 48 with respect to the outer diameter D of the upper cylinder 48 is preferably 0.1 or more. By setting the ratio (H / D) to 0.1, it is possible to effectively prevent the suspended matter from being caught on the upper side of the upper cylinder 48 and the floor 50. In this respect, the ratio (H / D) is more preferably equal to or greater than 0.2 and still more preferably equal to or greater than 0.3. From the viewpoint that the movement range of the upper cylinder 48 can be widened, the ratio (H / D) is preferably 2.0 or less.

  The height H is preferably 5 mm or more. By setting the height H to 5 mm or more, it is possible to effectively prevent the suspended matter from being caught on the upper side of the upper cylinder 48 and the floor 50. In this respect, the height H is more preferably 10 mm or more, and further preferably 15 mm or more. From the viewpoint that the movement range of the upper cylinder 48 can be widened, the height H is preferably 500 mm or less.

  As described above, the uki 50 has air confined in a closed space. For the purpose of imparting buoyancy to the upper cylinder 48, Uki can be realized not as a closed space but also as an open space with its lower part opened. Since the uki 50 is a closed space, the suspended matter does not enter the uki from the bottom of the uki 50. In this uki 50, the air inside the uki is prevented from leaking due to the entry of suspended matter. Furthermore, since floating substances do not enter the interior 50, cleaning the interior 50 is easy.

  As described above, the base 50 is preferably spherical. By making the Uki 50 spherical, it is possible to prevent the suspended matter from getting over the upper side of the upper cylinder 48 from being caught on the Uki 50.

  The upper cylinder 48 floats on the water in the water intake section 42 by the ground 50. For this reason, the upper cylinder 48 may incline with respect to the trunk | drum 46 with the wave etc. which the aquatic organism raised. This hinders smooth movement of the upper cylinder 48 relative to the barrel 46. In addition, by placing stones or sand on the bottom of the aquarium box 36, the trunk 46 may be inclined with respect to the vertical direction. Since the buoyancy of the ground 50 acts on the upper cylinder 48 in the vertical direction, the upper cylinder 48 tends to move in the vertical direction regardless of the inclination of the trunk cylinder 46. Due to the inclination of the trunk cylinder 48, the upper cylinder 48 may be caught by the trunk cylinder 46, and the upper cylinder 48 cannot move up and down.

  As described above, in this water intake device, the seal 49 is located between the upper cylinder 48 and the trunk cylinder 46. The seal 49 secures a gap larger than the thickness of the seal 49 between the inner surface of the upper cylinder 48 and the outer surface of the trunk cylinder 46. For this reason, the upper cylinder 48 can move in the vertical direction even if the trunk cylinder 46 is inclined. The upper cylinder 48 can move smoothly with respect to the trunk cylinder 46. As shown in FIG. 2, the width of the seal 49 is shorter than the vertical length of the overlapping portion of the upper cylinder 48 and the trunk cylinder 46. The seal 49 is unlikely to obstruct the vertical movement of the upper cylinder 48. The seal 49 reduces the amount of water that enters through the gap between the upper cylinder 48 and the trunk cylinder 46 and prevents the upper cylinder 48 from being caught by the trunk cylinder 46.

  As shown in FIG. 5, it is preferable that the outer surface of the seal 49 has a rounded shape that is convex outward. Furthermore, it is preferable that the outer surface of the seal 49 has an arc shape in the cross section. Thereby, the upper cylinder 48 is effectively prevented from being caught by the trunk cylinder 46.

  In the embodiment of FIG. 1, the upper portion of the barrel 46 enters the upper cylinder 48. The upper cylinder and the trunk cylinder may be configured so that the lower part of the upper cylinder enters the interior of the trunk cylinder. At this time, the inner diameter of the barrel is slightly larger than the outer diameter of the upper cylinder. In this case, the seal is provided at the lower part of the upper cylinder or the upper part of the trunk cylinder. The screen is provided so as to cover the lower surface of the upper cylinder.

  In the embodiment of FIG. 1, the upper end of the lower cylinder 44 enters the inside of the trunk cylinder 46. The trunk cylinder and the lower cylinder may be configured such that the lower end of the trunk cylinder enters the inside of the lower cylinder. At this time, the outer diameter of the barrel and the inner diameter of the lower cylinder are substantially the same.

  In the embodiment of FIG. 1, a seal 49 and a screen 51 are provided. Even if the seal is not provided, the seal is not necessarily required when the amount of water sucked by the pump is larger than the amount of water entering from the gap between the upper cylinder and the barrel. Also, there may be no screen.

  In the embodiment of FIG. 1, the pumped filter 38 comprises a pump. The filter and the pump may be configured separately.

  In the embodiment of FIG. 1, the pumped filter 38 comprises a pump. The water intake device may be provided with a pump without the filter being provided with a pump. This water intake device includes a water intake unit and a pump. In this case, the pump is located in the aquarium box.

  In the embodiment of FIG. 1, the pumped filter 38 is disposed away from the aquarium box 36. A filter 38 with a pump may be located on the aquarium box 36. In this case, the filtered water can be returned to the aquarium box by natural fall.

  In the embodiment of FIG. 1, the pumped filter 38 is disposed away from the aquarium box 36. A pumped filter 38 may be located below the aquarium box 36.

  In the embodiment of FIG. 1, the water taken in from the water intake section 42 is filtered and returned to the aquarium box 36. If it is only necessary to remove dust and the like in the water tank box 36 and it is not necessary to return water to the water tank box 36, the main body and the water supply pipe 41 may be omitted. In this case, the water taken in from the water intake unit 42 is discarded as it is. Or this water is processed with another sewage treatment apparatus. If necessary, the aquarium box 36 is supplied with clean water from another water supply device.

  In the embodiment of FIG. 1, the water intake device 34 is applied to an aquatic aquarium 32. The use of the water intake device 34 is not limited to aquatic aquarium. This water intake device 34 can be applied for other uses to remove suspended matters near the water surface. It can be applied to the removal of oil slicks and floating substances floating on the tub, pool, and sea surface. When liquids having different specific gravities are present separately in an upper layer and a lower layer, it can be applied to efficiently separate only the upper layer.

  As described above, according to the present invention, only surface water can be sucked regardless of a change in the position of the water surface. According to the present invention, it is possible to efficiently remove dusts floating near the water surface. According to the present invention, it is not necessary to worry about the idling of the pump due to the change in the position of the water surface. In this water intake device 34, it is not necessary to increase the size of the filter. Further, the water intake device 34 is easy to clean. From the above, the effectiveness of the present invention is clear.

  The water intake device 34 described above can be applied to various water tanks. In addition, it can be applied to various uses for removing suspended matters near the water surface.

2, 12, 32 ... Water tank 4, 14, 34 ... Water intake device 6, 16, 36 ... Water tank box 8, 18, 38 ... Filter 20 ... Pump 40 ... Water absorption pipe 41 ... Water pipe 42 ... Water intake part 44 ... Lower cylinder 46 ... Cylinder 48 ... Upper cylinder 49 ... Seal 50 ... Uki 51 ... Screen 52 ... Cylinder Part 54 ... Plate part 56 ... Weight 58 ... Hole 60, 62 ... Screw 64 ... Upper end

Claims (10)

It has a water intake section located in the water,
The water intake portion is fixed in water and has a cylindrical body that extends vertically, an upper cylinder that is detachably fitted to the cylindrical cylinder and has a thin cylindrical shape, and is fixed to the inside of the upper cylinder. And equipped with
By the above-mentioned, according to the change of the water level inside the intake section, the upper cylinder can be moved up and down while being fitted in the trunk cylinder,
A water intake device in which when the water is discharged from the water intake section, the upper cylinder moves downward due to a drop in the water level inside the water intake section, and water flows into the water intake section from the upper side of the upper cylinder.   The water intake device according to claim 1, wherein an upper end of the upper cylinder is rounded upward.   The water intake device according to claim 1 or 2, wherein a ratio (W / D) of a thickness W of the upper cylinder to an outer diameter D of the upper cylinder is 0.08 or less.   The water intake section further includes a lower cylinder positioned below the trunk, and the trunk and the lower cylinder can extend and contract from the upper end of the trunk to the lower end of the lower cylinder. The water intake device according to claim 1, wherein the water intake device is connected to the water intake device.   The water intake device according to any one of claims 1 to 4, wherein an upper end of the base is located below an upper end of the upper cylinder.   The ratio (H / D) of the height H to the outer diameter D of the upper cylinder is 0.1 or more when the height from the upper end of the base to the upper end of the upper cylinder is H. The water intake device described in 1.   The water intake device according to any one of claims 1 to 6, wherein the space is obtained by confining air in a closed space.   The water intake device according to any one of claims 1 to 7, wherein a seal is positioned between the upper cylinder and the cylinder when the upper cylinder is fitted into the cylinder.   The water intake device according to any one of claims 1 to 8, wherein the water intake device is for an aquarium for aquatic organisms. A water tank box, a water intake section located in the water tank box, a pump that is connected to the water intake section and sucks water in the water intake section, and a filter that is connected to the pump and filters water sucked by the pump. Has
The water intake portion is fixed in water and has a cylindrical body that extends vertically, an upper cylinder that is detachably fitted to the cylindrical cylinder and has a thin cylindrical shape, and is fixed to the inside of the upper cylinder. And equipped with
The upper cylinder is movable up and down with the upper cylinder fitted in the barrel according to the change in the water level inside the intake section by the above-mentioned
When the pump is operated and water is sucked from the water intake unit, the upper cylinder moves downward by lowering the water level in the water intake part, and water flows into the water intake part from the upper side of the upper cylinder,
A water tank for returning water sent from the filter to the water tank box.

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