Speed-increasing machine for water

A speed-increasing machine for water includes a frame member, a plurality of buoyant members mounted to the lower end of the frame member, a motor mounted to the center of the frame member, and a shielding cover mounted outside the motor. A rotating shaft of the motor is attached to a guide vane set. The guide vane set has a plurality of guide plates for guiding the circulating water current. When driving the motor, the vanes rotate to circulate the water in the cultivation pool, to thereby uniformly increase the dissolved oxygen in the cultivation pool.

BACKGROUND OF THE INVENTION

This invention relates to a speed-increasing machine for water, which can be used in a cultivation pool in the aquaculture industry. By utilizing of the rotation of vanes, the circulation of water in the cultivation pool can be improved and the amount of oxygen dissolved in the water can thus be increased.

Water quality and dissolved oxygen in the cultivation pool are the most important factors for aquaculture. For high-density cultivation that is often adopted for saving cost, a large quantity of aquatics exists in a certain area, which may result in massive death of the aquatics when the water quality deteriorates or the dissolved oxygen is insufficient, leading to tremendous damage.

A typical cultivation pool is bounded in a certain area so that the water in the cultivation pool flows relatively slowly, resulting in insufficient dissolved oxygen. Therefore, Machines are often utilized to increase the dissolved oxygen in the water. A typical design available in the market is a small buoyant raft on which a motor is mounted for driving vanes attached to both sides of the raft. A portion of the vanes is above the water level, and the other portion of the vanes is below the water(so-called water wheel). As a result, water in the cultivation pool splashes when the vanes rotate so that water in the deep of the cultivation pool can come into contact with the air above the water level to thereby increase the dissolved oxygen. However, this method can only increase the dissolved oxygen in the area adjacent to the water level, but the dissolved oxygen in deep water is still very low.

With reference toFIG. 11, another kind of oxygen supply machine5is shown, which also has a frame53, floats531mounted on both sides of the frame53for buoying the frame53up, a motor51mounted on a top side of the frame53, and a tank52below the frame53. An output shaft511is located in the tank52, and a vane512is mounted on the output shaft. A water inlet521is provided in the bottom of the tank52. A water outlet tube522is mounted on a side of the tank52. A conduit523is mounted on a side of the water outlet tube522. One end of the conduit523is extended upwards to above the water level for introducing ambient air into the water outlet tube522. When the vanes512are turned by the motor51, water in the cultivation pool is sucked by the vanes512via the water inlet512into tanks52and then exits via the water outlet tube522, creating circulating water currents during which the water flowing through the water outlet tube522comes into contact with air in the conduit523while creating a suction force for sucking ambient air into the water via the conduit523. Thus, the dissolved oxygen is increased.

However, after using the aforementioned method to increase the dissolved oxygen in water, it is found that the aquatics intend to gather around the oxygen supply machine5because the circulating water currents flow through a small area. In other words, water with high dissolved oxygen is only distributed in a small area around the oxygen supply machine5instead of wide, uniform distribution in the cultivation pool. As a result, the dissolved oxygen in the water area away from the oxygen supply machine is still insufficient. Thus, the conventional oxygen supply machine5still fails to effectively solve the problems of high-density cultivation.

SUMMARY OF THE INVENTION

In order to solve the problems of conventional art, a speed-increasing machine for water in accordance with the present invention comprises a frame member, a motor mounted on the frame, a plurality of buoyant member mounted below the frame member, and a shielding cover mounted on the frame member and outside the motor.

A rotating shaft of the motor is attached to a guide vane set. The guide vane set has a main rod provided with several vanes on a lower end of the main rod. A guide wheel is provided on a lower side of the vanes. The guide wheel is obliquely provided with a plurality of guide plates.

With the above structure, the present invention can produce the circulation of water in the cultivation pool. Further, oxygen can be more easily to be dissolved in the water by the rotation of the guide vane set.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The structure and effect of the embodiment of the present invention will be described in detail with reference to the accompanying drawings.

With reference toFIGS. 1 to 5, the speed-increasing machine comprises a frame member1, a plurality of extended rods14provided on the frame member1, a buoyant member13mounted on the end of each extended rod14. The buoyant member13can be a buoy or any buoyant material for floatingly supporting the frame member1on the water level, such as the buoyant member13of the present embodiment has a spherical shape. The end of the extended rod14is fixed with a fixing plate15. An arc link16is connected between two adjacent fixing plates. The center of the frame member1is provided with a motor2. A shielding cover12is provided outside the motor2for protection purpose. A guide vane set3is mounted on the lower end of the frame member1with attached to the motor. With the motor2, the guide vane set3can rotate an thus produce the circulation of water. The number of the buoyant member13, extended rod14and fixing plate14of the present embodiment can be increased or decreased depending on the actual condition, as shown inFIG. 6.

With reference toFIG. 4, the present invention is characterized in that a wide area of circulation can be created by rotating the specific guide wheel30, and that the circulation of water comes into contact with the ambient air above the water level to increase the dissolved oxygen, and the water with high dissolved oxygen can be uniformly distributed in the cultivation pool by the wide area of circulation. Further, the figures of the present invention disclose a structure relating to a guide wheel30, all shown as the guide wheel30rotating to the left (in a counterclockwise direction). The guide vane set3has a main rod33provided with a coupling hole34on a face of one end. The shape of the coupling hole34is the same as that of the rotating shaft21of the motor2so that the latter can penetrate into the coupling hole34and join with it. Further, a pin22is transversely provided for more stably connection. A plurality of vanes35are provided on the end of the main rod33. The vanes35are vertically extended along the main rod33, and also can be annularly equispaced. A plurality of spaced through holes351are provided on the vertical surface of the vanes35.

A guide wheel30is mounted below the main rod33and the vanes35. The guide wheel30has two upper and lower rings31, and is separated into a plurality of sectors32by the vanes35. A plurality of fenders37are provided between the two rings31and near the vanes35. Each fender37is spaced away corresponding to the vanes35so that a space38is formed between two adjacent fenders37. Thus, each sector32includes a fender37and a space38. A guide plate36is provided in each sector32and near the fender37. Each guide plate36is formed as a triangular sheet and comprises three sides and three apexes. One side of each guide plate36adjoins the bottom edge of each vane35, with an apex being located at the lower end of the main rod33and an apex being located at the fender37adjacent to vane35. The remaining apex is located near the diagonal of the above two apexes, so that each guide plate36extends and inclines upwards near one side of the vanes35.

With reference toFIG. 1andFIG. 10again, the speed-increasing machine should be located in the cultivation pool4during operation. At that time, the guide vane set3is located below the water level, while the frame member1and the motor2buoy up by the buoyant member13. Since the flow direction of the water can be influenced by the northern and southern magnetic poles, if the speed-increasing machine of the present invention is used in a cultivation pool in northern hemisphere, the guide vane set3disclosed in the figures of the present invention should preferably rotate in a counterclockwise direction. The guide plate36thus can preferably inclined to the right along the rotating direction. Thus, deep water in the cultivation pool flows upward under the guiding by the guide plates36when the vanes35turn. The space38of the guide wheel30provide a path for the water to flow into and out of the guide wheel30. Since a negative pressure is created when the guide vane set3rotates to create water current, the deep water in the cultivation pool flows upwards under the action of the negative pressure. Since the water in the cultivation pool flows the vaes35when the vanes35rotating, the flowing speed on the front surface is lower than that on the back surface, the through holes351individually provided on the vertical face of the vanes35can receive the water current in the through holes351. According to Torricelli Formula derived from the Bernoulli Theorem υ=√{square root over ( )}2gh, in which υ is the flowing speed of the through hole351; h is the distance from the through hole351to the water level of the cultivation pool. It can be seen that the flowing speed of water at the through hole351is identical to the falling speed of a particle from the water level to the through hole351. Further, when the flowing speed is υ∞ and the pressure is p ∞, in such condition, the water flows around the guide wheel30. After the water is stopped by the rotation of the guide wheel30, the flowing speed of water is zero at a stationary point at a front edge of the through hole351of the vane35. According to the Bernoulli Theorem, the pressure at the stationary point is p0=p∞+ρυ2∞/2.

That is, the total pressure is just identical to the sum of the stationary pressure p∞ and the dynamic pressure ρυ2∞/2. Thus, the water in the cultivation pool flows through the vanes35with the vanes35rotating, the flowing speed on the front surface of the vane35is lower than that on the back surface, that is to say, the pressure on the front surface of the vane35is higher than that on the back surface, thus creating a lifting force. As a result, a wide range of circulation of water can be created and the circulating water comes into contact with the ambient air above the water level to increase the dissolved oxygen, to thereby distribute the circulating water to a deep and far area. By this way, the problems of conventional oxygen supply machines can be solved.

Further, the northern and southern magnetic poles affect the water current, the guide vane set3of the present invention preferably rotates clockwise in the southern hemisphere.FIG. 9. shows a structure of a guide vane set3awhich slowly rotates clockwise. Since the rotating direction is reverse, the guide plate36should be inclined to the left (the left is lower and the right is higher) corresponding to the rotating direction. The positions of the fender37of each sector32and the position of the space38should be exchanged corresponding to the inclination of the guide plate36. Thus, the structure ofFIG. 1and that ofFIG. 5are in mirror symmetry, and a guide vane set that slowly rotates clockwise is formed.

With reference toFIG. 7andFIG. 8, the third embodiment of the present invention mainly comprises an annular buoyant member13instead of the spherical buoyant member17. A plurality of screws131are provided on the upper surface of the buoyant member13. The screws131can penetrate the fixing rod11and be secured by a nut132.

With reference toFIG. 7andFIG. 8again, in the present invention, the modification on the frame member1is that a plurality of fixing rod11is provided on the frame member1. A buoyant member13is respectively mounted on the lower end of the frame member1and the fixing rod11on both sides. Further, a motor2is provided in the center of the frame member1and near the fixing rod11. A shielding cover12is provided outside the motor2for protective purpose. A guide vane set3is mounted on the lower end of the frame member1and attached to the motor2. With the driving of the motor2, the guide vane set3rotates to create the circulation of water.

According to the above, the rotating direction of the guide vane set3of the present invention can change depending on the northern or southern magnetic pole, to thereby obtain the optimal effect. The rotating direction of the guide plate36can be inclined to the right (the left is higher and the right is lower), or inclined to the left (the left is lower and the right is higher). The present invention can achieve the aforementioned effects and indeed conform to the requirements for a utility model patent.