JP2013173087A - Propeller water circulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate exchange of a bearing that is an article of consumption, to enable to improve performance of a propeller in which a gap between a tip of the rotating propeller and an inner circumferential side surface of a propeller casing that is newly provided at the periphery can be reduced as much as possible, and further to prevent a motor from stopping by that garbage is prevented from being filled between a tip of the propeller and a propeller casing inner circumferential side surface.SOLUTION: A propeller casing 17 of a cylindrical shape that has a radius that is slightly larger than a radius of gyration of a propeller 14 that rotates in an inside of a water pipe 19 is disposed to an inner circumferential side surface of an upper part of the water pipe 19, a propeller shaft 13 is disposed in an upper and lower direction by a shaft cover 15 of a cylindrical shape that is downwardly supported from a lower part of a motor 11 is inserted, support plates 18 are installed at an outer peripheral side surface of the shaft cover 15 to radially project, a part of an inner circumferential side surface of the propeller casing 17 is coupled with a tip of each support plate 18, and the propeller casing 17 is lifted and held at a lower part of the motor 11 through the shaft cover 15.

Description

  The present invention relates to a propeller-type water circulation device that purifies the water in a closed water area such as a dam or a lake while purging the surface water using a water pipe arranged vertically below the water surface, in particular, It is easy to replace the consumable bearing, and the gap between the rotating propeller tip and its outer periphery is made as small as possible to improve the performance of the propeller. In addition, dust is clogged between the propeller tip and its outer periphery. The present invention relates to a propeller-type water circulation device that prevents the motor from stopping by preventing it.

A motor 102 and a propeller 103 are incorporated in a floating body 101 that floats on the water surface, and water in a closed water area such as a dam or lake is circulated up and down while sending surface water to the bottom of the water using a water pipe 104 arranged vertically below the water surface. A propeller-type water circulation device 100 for purification is known. In this device, in the structure in which the floating body 101 and the water supply pipe 104 are integrated, when the support plate 107 that supports the bearing 106 of the propeller shaft 105 is radially attached to the upper inner peripheral surface of the water supply pipe (see FIG. 6), it is consumed. In order to replace the bearing 106, which is a product, it is necessary to lift the entire floating body 101 and the water supply pipe 104 to the land or to separate the bearing 106 from the water supply pipe 104 by underwater work. This workload is heavy.
Therefore, as shown in FIG. 7, there is a system in which the bearing 106 is attached to the floating body on the water surface and the propeller shaft and the propeller are hung in a cantilevered state from the upper side of the bearing so that the bearing can be replaced on the floating body.

However, in the structure of FIG. 7, unless the mounting accuracy of the propeller shaft 105, the mounting accuracy of the water pipe 104, and the shape accuracy of the water pipe 104 are increased, the tip of the rotating propeller 103 contacts the inner peripheral surface of the water pipe. In order to avoid this, the gap between the tip of the propeller 103 and the inner peripheral side surface of the water pipe must be increased. Increasing the accuracy of production and assembly becomes extremely difficult, especially as the apparatus becomes larger.
In addition, if the gap between the tip of the propeller 103 and the inner peripheral surface of the water pipe is large, the performance of the propeller 103 deteriorates, and dust a is clogged between the tip of the propeller and the inner peripheral surface of the water pipe (see FIG. 8) and rotates. A large resistance acts on 103 and the motor 102 stops.

  The present invention has been devised in view of the above-described problems to solve the problems. The object of the present invention is to facilitate replacement of a bearing, which is a consumable, and to rotate a propeller tip that rotates. The gap with the inner peripheral side of the propeller casing newly provided on the outer periphery can be made as small as possible to improve the performance of the propeller, and also prevent dust from clogging between the tip of the propeller and the inner peripheral side of the propeller casing. An object of the present invention is to provide a propeller-type water circulation device that can avoid the motor from stopping.

  In order to achieve the above object, the invention of claim 1 is a closed water area in which a motor and a propeller are incorporated in a floating body floating on the water surface, and surface water is sent to the bottom of the water using a water pipe arranged vertically below the water surface. In a propeller-type water circulation device that circulates and purifies water in a vertical direction, a cylindrical propeller casing having a radius slightly larger than the rotation radius of the propeller rotating inside the water supply pipe is an outer periphery of the rotating propeller. It is arranged on the inner peripheral side of the upper part of the water pipe, and the propeller shaft attached to the lower end side is inserted vertically through the cylindrical shaft cover supported downward from the lower part of the motor, Attach and support a support plate radially on the outer peripheral side surface of the shaft cover and connect a part of the inner peripheral side surface of the propeller casing to the tip of each support plate, The serial propeller casing is made from means hung at the bottom of the motor via the shaft cover.

  According to a second aspect of the present invention, in the first aspect, a dust removal hole is formed in a part of the inner peripheral side surface of the propeller casing located on the rotation locus of the propeller tip.

According to the propeller-type water circulation device according to the present invention comprising means for solving the problems, the following effects can be obtained.
(1) The propeller shaft including the propeller casing can be integrally lifted on the floating body to replace the bearing inside the shaft cover.
(2) The production accuracy of the propeller casing and the attachment accuracy with the shaft cover can be increased more easily than the assembly accuracy and production accuracy in the case of FIG. Therefore, the performance of the propeller can be improved because the distance between the inner surface of the propeller casing and the tip of the propeller can be reduced, and the gap between the propeller casing and the water supply pipe becomes difficult to flow.
(3) Although the distance between the tip of the propeller and the inner surface of the propeller casing is reduced and large dust is not clogged, a phenomenon in which small dust is clogged between the propeller tip and the propeller casing occurs. However, since the dust is small, when the tip of the propeller rotates, when it reaches the position of the dust hole drilled in the propeller casing, it enters into the recess between the propeller casing and the water pipe, and is released from the clogged state. Will be carried downstream.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general | schematic whole sectional side view of the propeller-type water circulation apparatus which shows the form for implementing this invention. It is a perspective view of the propeller provided in the inside of the propeller casing which shows the form for implementing this invention. It is a top view of the propeller provided in the inside of the propeller casing which shows the form for implementing this invention. It is the elements on larger scale of the dust removal hole which shows the form for implementing this invention. It is sectional drawing of the propeller provided in the inside of the propeller casing which shows the form for implementing this invention. It is a schematic whole sectional side view of the conventional propeller-type water circulation apparatus. It is a general | schematic whole sectional side view of another conventional propeller-type water circulation apparatus. It is a top view of the propeller provided in the inside of the conventional water pipe.

  Hereinafter, the present invention will be described more specifically based on embodiments for carrying out the invention described in the drawings.

  In the figure, the propeller-type water circulation device 1 is installed in a closed water area such as a dam or a lake, for example, and feeds water from the dam or lake while feeding surface water to the bottom of the water through a water pipe 19 arranged vertically below the water surface. A device that circulates and purifies, and includes a motor 11, a floating body 12, a propeller shaft 13, a propeller 14, a shaft cover 15, a bearing 16, a propeller casing 17, a support plate 18, a water pipe 19, and the like.

  The motor 11 rotates the propeller 14 attached to the lower end of the propeller shaft 13 via the propeller shaft 13 to generate a downward water flow with the rotating propeller 14, and feeds surface water such as dams and lakes to the water pipe. This is a driving source that forcibly feeds water through the bottom 19 and causes the water to circulate up and down. The motor 11 is attached downward to the center of the floating body 12 above the water surface, and the upper end side of the propeller shaft 13 is attached downward to the motor 11. For example, an electric motor is used as the motor 11.

  The floating body 12 floats on the water surface, holds the motor 11 on the water surface, and holds a water pipe 19 that is disposed vertically in the water near the water surface. The floating body 12 is made of a material having a specific gravity smaller than that of water, or has a structure in which a cavity is formed inside and floats on water. The floating body 12 is formed in a shape that is easy to work on the floating body 12, such as a square shape or a circular shape, as viewed from above.

  A circular through hole 12 a is formed in the center of the floating body 12. The inner diameter of the through hole 12a is larger than the outer diameter of the propeller casing 17, and the propeller casing 17 is pulled up on the floating body 12 during replacement work through the through hole 12a, or the propeller casing 17 that has been replaced on the floating body 12 is placed below the water surface. It has a structure that can be returned.

  The propeller shaft 13 transmits the rotational driving force of the motor 11 to the propeller 14. As described above, the upper end side of the propeller shaft 13 is interlocked and connected to a rotational driving shaft (not shown) of the motor 11 via a speed reducer. Yes. Further, as described above, the propeller 14 is integrally attached to the lower end side of the propeller shaft 13. The propeller 14 rotates integrally with the propeller shaft 13 that rotates about the axis, and rotates about the vertical axis to generate a downward water flow. In the drawing, the number of blades of the propeller 14 is three, but other numbers may be used.

  The outer periphery of the propeller shaft 13 is covered with a shaft cover 15. The shaft cover 15 serves to suspend the propeller casing 17 via the support plate 18. The shaft cover 15 has a hollow cylindrical shape, and the propeller shaft 13 is attached so as to pass through the inside of the cylindrical shaft cover 15. The inner diameter of the shaft cover 15 is sufficiently larger than the outer diameter of the propeller shaft 13, and the rotating propeller shaft 13 does not contact the inner peripheral side surface of the shaft cover 15. The upper end side of the shaft cover 15 is connected to the lower surface side of the motor 11.

  A bearing 16 is internally provided at the inner lower end side of the shaft cover 15. The outer peripheral side surface of the cylindrical bearing 16 is attached to the inner peripheral side surface on the lower end side of the bearing 16. The lower end of the shaft cover 15 is shorter than the lower end of the propeller shaft 13, and the lower end side of the propeller shaft 13 protrudes downward from the lower ends of the bearing 16 and the shaft cover 15, and the lower end side of the protruding propeller shaft 13 A propeller 14 is attached. The propeller shaft 13 is rotatably supported by the bearing 16 immediately before protruding on the lower end side of the shaft cover 15.

  The outer periphery of the rotating propeller 14 is covered with a propeller casing 17. The propeller casing 17 has a hollow cylindrical shape with both ends opened, and the propeller 14 rotates inside the hollow cylindrical shape. The propeller casing 17 has a cylindrical end facing upward and downward. The cylindrical interior of the propeller casing 17 is manufactured in a true circle. The inside of the cylindrical shape of the propeller casing 17 becomes a flow path of water sent to the bottom of the water. The propeller casing 17 is attached to the inner peripheral side surface of the upper part of the water supply pipe 19.

  The cylindrical propeller casing 17 has a radius that is slightly larger by, for example, 1 mm to 10 mm than the rotation radius of the propeller 14 that rotates inside. That is, when the propeller 14 is rotated with the rotation center of the propeller 14 aligned with the circular center of the propeller casing 17, the distance between the propeller tip 14 a and the inner peripheral side surface 17 a of the propeller casing, that is, the gap is as small as possible. As described above, the propeller casing 17 is connected and supported to the shaft cover 15 via the support plate 18. The smaller the distance between the rotating propeller tip 14a and the inner peripheral side surface 17a of the propeller casing, that is, the gap, the higher the performance of the propeller 14, that is, the ability to feed water to the bottom of the water. However, the gap between the propeller tip 14a and the inner peripheral side surface 17a of the propeller casing is determined and determined based on restrictions on manufacturing accuracy, an excessive amount and size of dust assumed.

  The support plate 18 is a member that connects and supports the propeller casing 17 to the outer peripheral side surface of the shaft cover 15 that is arranged vertically at the center thereof. The support plate 18 is provided so as to be arranged radially, for example, in a cross shape, from the outer peripheral side surface of the shaft cover 15 toward the outer peripheral direction. One end side of the four support plates 18 is fixed to the outer peripheral side surface on the lower side of the central shaft cover 15. The other end side of the four support plates 18 is fixed to the inner peripheral side surface 17 a on the upper end side of the propeller casing 17.

  When the propeller casing 17 is connected to and supported by the shaft cover 15 via the support plate 18, the propeller that is supported by the circular center on the inner peripheral side of the cylindrical propeller casing 17 and the bearing 16 in the shaft cover 15 rotates. The 14 rotation centers are connected so as to coincide as much as possible. Further, the propeller casing 17 is connected and supported to the shaft cover 15 via a support plate 18 at a height position where the propeller 14 can rotate in the vicinity of the middle of the vertical height of the propeller casing 17.

  Dust removal holes 17b are formed in at least one place, that is, one place or a plurality of places on the inner peripheral side surface 17a of the propeller casing. The dust removal hole 17b is a hole for naturally removing dust a when the clearance between the rotating propeller tip 14a and the outer peripheral side propeller casing inner peripheral side surface 17a is clogged.

  The clogged dust a is dragged by the rotating propeller tip 14a and rotates while being in close contact with the inner peripheral side surface 17a of the propeller casing. When the rotating dust a comes into the dust hole 17b, the dust a temporarily enters the dust hole 17b and is separated from the propeller tip 14a so that the dust a can be clogged. The dust a that has entered the dust hole 17b flows downward by the downward flow of water until the next propeller 14 turns around.

  The part where the dust removal hole 17b is formed is an inner peripheral side surface at a height located on the locus drawn by the rotating propeller tip 14a. The shape of the dust removal hole 17b is, for example, a circle or an ellipse. The propeller tip 14a is slightly inclined to feed water up and down, but the minimum length in the height direction of the dust removal hole 17b is the length between the inclined uppermost end and the inclined lowermost end of the rotating propeller tip 14a. That's it.

  The depth of the dust removal hole 17b, that is, the depth of the propeller casing 17 in the plate thickness direction is such that the dust a dragged by the rotating propeller tip 14a enters the dust removal hole 17b and can be completely removed from the propeller tip 14a. That's it. Further, for example, the distance between the rotating propeller tip 14a and the inner peripheral side surface 17a of the propeller casing, that is, a depth equal to or greater than the gap may be used. Further, the dust hole 17b may be formed as a through hole in the inner peripheral side surface 17a of the propeller casing.

  The water supply pipe 19 is a pipe that forms a flow path when the surface layer water is supplied to the bottom of the water. A steel pipe is used for the water supply pipe 19 or a flexible pipe as shown in the figure. The upper side of the water pipe 19 is suspended from the lower surface side of the floating body 12. A propeller casing 17 is mounted inside the upper portion of the water pipe 19.

  When the propeller casing 17 is used as in the present invention, since the propeller casing 17 is disposed on the outer peripheral side of the rotating propeller 14, the propeller casing 17 rotates even when the flexible water supply pipe 19 is used. The propeller tip 14a does not come into contact.

Next, the operation based on the configuration of the embodiment for carrying out the invention will be described below.
For example, in order to purify water quality in a closed water area such as a dam or a lake, a propeller-type water circulation device 1 is installed on the surface of the water area. A motor 11 is disposed on the central through hole 12 a of the floating body 12. A propeller shaft 13 is attached to the motor 11 downward. A propeller 14 is attached to the lower end side of the propeller shaft 13, and the outer periphery of the propeller shaft 13 is covered with a shaft cover 15. Support plates 18 are attached to the shaft cover 15 so as to project radially, and the tips of the support plates 18 are connected to the inner peripheral side surface 17a of the propeller casing. That is, the propeller casing 17 is connected to and supported by the shaft cover 15 via the support plates 18. The propeller casing 17 is attached in a state of being inserted into the upper part of the water pipe 19.

  When the motor 11 of the propeller-type water circulation device 1 is driven, the driving force of the motor 11 rotates the propeller shaft 13 attached to the motor 11 downward about the axis. When the propeller shaft 13 rotates, the propeller 14 attached to the lower end side of the propeller shaft 13 rotates together with the propeller shaft 13. The rotation direction of the propeller 14 is a direction in which the surface layer water is sent to the bottom of the water, and the surface layer water moves downward in the water supply pipe 19 by the rotating propeller 14.

  In this case, the surface water may contain suspended solids a, and the propeller tip 14a and the inside of the propeller casing rotate the surface water containing the dust a fed from the upper surface side of the propeller casing 17. When passing through a slight gap with the peripheral side surface 17a, dust a may be caught in the gap between the rotating propeller tip 14a and the inner peripheral side surface 17a of the propeller casing.

  The sandwiched dust a moves along the inner peripheral side surface 17a of the propeller casing by the rotating propeller tip 14a. Since at least one dust removal hole 17b is formed in the inner peripheral side surface 17a of the propeller casing in the region where the propeller tip 14a rotates, in FIG. 3, the dust a sandwiched between the propeller tip 14a rotates around the periphery. In the middle of movement, it enters this dust hole 17b. When the dust a enters the dust removal hole 17b, the dust a attached to the propeller tip 14a is detached therefrom.

  In this way, the dust a that adheres to the propeller tip 14a and is sandwiched between the inner peripheral side surface 17a of the propeller casing is separated by entering the dust removal hole 17b formed in the region where the propeller tip 14a rotates. The dust a that has entered the dust removal hole 17b is discharged from the hole 17b by the rotational flow of water generated until the next propeller tip 14a passes in front of it, and the running water flows under the propeller 14. Sent out by.

  Since such an operation occurs continuously, the dust a contained in the surface water is sandwiched between the propeller tip 14a and the inner peripheral side surface 17a of the propeller casing, thereby causing the propeller 14 to stop rotating. Therefore, the surface layer water can be stably sent toward the bottom of the water.

  The propeller casing 17 is inserted into the upper side of the water supply pipe 19, and the propeller 14 and the propeller casing 17 are integrally formed through the shaft cover 15 and the support plate 18. Therefore, the propeller tip 14a and the propeller casing inner peripheral side surface 17a The accuracy of the gap with the can be kept constant.

  Maintenance, repair, inspection, etc. can also be performed by removing the propeller casing 17 from the upper side of the water pipe 19, so that the entire water pipe 19 is pulled up or the upper side of the water pipe 19 is fed as before. Operations such as cutting and separating from the main body of the water pipe 19 can be made unnecessary, and these operations become very easy.

  The present invention is not limited to the embodiment for carrying out the invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Propeller type water circulation device 11 Motor 12 Floating body 12a Through-hole 13 Propeller shaft 14 Propeller 14a Propeller tip 15 Shaft cover 16 Bearing 17 Propeller casing 17a Propeller casing inner peripheral surface 17b Dust removal hole 18 Support plate 19 Water pipe a Waste

Claims (2)

In the propeller-type water circulation device that incorporates a motor and a propeller into a floating body that floats on the water surface and purifies the water in the closed water area by circulating it up and down using a water pipe arranged vertically below the water surface while sending the surface water to the bottom of the water. A cylindrical propeller casing having a radius slightly larger than the rotation radius of the propeller rotating inside the water supply pipe is disposed on the inner peripheral side surface of the upper portion of the water supply pipe serving as the outer periphery of the rotating propeller. A propeller shaft attached to the lower end side is inserted vertically through a cylindrical shaft cover supported downward from the lower part of the motor, and a support plate is radially extended and attached to the outer peripheral side surface of the shaft cover. In addition, a part of the inner peripheral side surface of the propeller casing is connected to the tip of each support plate, and the propeller casing is lifted through the shaft cover. Propeller water circulation system, characterized in that hung on the bottom of the motor. The propeller-type water circulation device according to claim 1, wherein a dust removal hole is formed in a part of the inner peripheral side surface of the propeller casing located on the rotation locus of the tip of the propeller.

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