Abstract:
The present invention proposes a cyclic gravitation power generation system, which comprises a vertical water tank, a propulsive device, a guiding device, a carrying device and a power generation device, wherein potential energy is converted into kinetic energy to drive a generator to generate electric power when float balls are moved downward from a high position to a low position by gravity, and the vertical water tank can make the float balls to be moved back to the high position to perform a cyclic operation, whereby is achieved a low-cost cyclic power generation system.

Description:
FIELD OF THE INVENTION 
     The present invention relates to a power generation system, particularly to a gravitation power generation system. 
     BACKGROUND OF THE INVENTION 
     In the modern world, electricity is indispensable energy for daily life as well as for industrial development. 
     Electricity is usually generated by a nuclear power plant or a thermal power plant. However, the conventional power plants generate nuclear waste or emit carbon dioxide to ruin the environment. Therefore, much attention is paid to the green energy systems, such as the wind power generation system, hydroelectric power generation system and solar power generation system. 
     The green energies are environment-friendly and sustainable. However, the green energies are expensive and hard to harness artificially at present. Therefore, they cannot extensively replace the conventional energy sources yet. 
     Accordingly, the Inventor proposes a cyclic gravitation power generation system, which is expected to generate electric power with a low investment. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide a cyclic gravitation power generation system, wherein potential energy is converted into kinetic energy to drive a generator to generate electric power when float balls are moved downward from a high position to a low position by gravity, and wherein a vertical water tank can make the float balls to move back to the high position from the low position to perform a cyclic operation, whereby is achieved a low-cost cyclic power generation system. 
     To achieve the abovementioned objective, the present invention proposes a cyclic gravitation power generation system, which circulates float balls thereinside to generate electric power and comprises a vertical water tank, a propulsive device, a guiding device, a carrying device and a power generation device. The vertical water tank further comprises a holding space, a block plate and a guiding portion. The holding space has an aperture on a side wall near the bottom of the vertical water tank. The block plate is hinged on the wall of the vertical water tank to cover the aperture. The guiding member is formed at an opening of the vertical water tank. The propulsive device is a hollow structure and further comprises an inlet at a lateral of the propulsive device. One end of the propulsive device is coupled to the aperture to interconnect with the vertical water tank. The other end of the propulsive device has a hydraulic propeller, and the propulsive device is tilted upward to the hydraulic propeller. The guiding device further comprises two rotary wheels and a first transmission belt wound around the two rotary wheels. A plurality of guiding elements are installed on the first transmission belt. The guiding device is located above the guiding portion of the vertical water tank, and has one end fixedly installed at the opening of the vertical water tank. The carrying device further comprises an upper wheel assembly, a lower wheel assembly and a second transmission belt wound around the upper wheel assembly and the lower wheel assembly. The upper wheel assembly and the lower wheel assembly are respectively installed at a high position and a low position opposite to the high position. The lower wheel assembly is located above the inlet of the propulsive device. A plurality of carrying elements are installed on the second transmission belt. A coupling transmission belt is wound around the upper wheel assembly and one rotary wheel of the guiding device. The power generation device further comprises a speed-change gear assembly and a generator coupled to the speed-change gear assembly. The speed-change gear assembly is coupled with the lower wheel assembly of the carrying device. The rotation of the lower wheel assembly can rotate the speed-change gear assembly to drive the generator to generate electric energy. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a diagram schematically showing a cyclic gravitation power generation system according to the present invention; 
         FIG. 2  is a diagram schematically showing a block plate inside a vertical water tank of a cyclic gravitation power generation system according to the present invention; 
         FIG. 3  is a diagram schematically showing the cyclic condition of a cyclic gravitation power generation system according to the present invention; 
         FIG. 4  is a diagram schematically showing the cyclic condition that float balls are delivered from a carrying device to a propulsive device in a cyclic gravitation power generation system according to the present invention; 
         FIG. 5A  is a diagram schematically showing that a hydraulic propeller is not propelled according to the present invention; 
         FIG. 5B  is a diagram schematically showing that a hydraulic propeller is propelled according to the present invention; and 
         FIG. 6  is a diagram schematically showing the cyclic condition that float balls are delivered from a guiding device to a carrying device in a cyclic gravitation power generation system according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Refer to  FIGS. 1-3 . The cyclic gravitation power generation system of the present invention circulates float balls  60  thereinside to generate electric power and comprises a vertical water tank  10 , a propulsive device  20 , a guiding device  30 , a carrying device  40  and a power generation device  50 . 
     The vertical water tank  10  has a holding space  11 . The holding space  11  has an aperture  12  on a side wall near the bottom thereof. A block plate  13  is hinged on the wall of the vertical water tank  10  to cover the aperture  12 . A pivot of the block plate  13  has at least one torsion spring  14  to automatically restore the opened block plate  13  back to the closed state. The block plate  13  is tilted toward the bottom of the vertical water tank  10 . An opening of the vertical water tank  10  has a guiding portion  15 . The guiding portion  15  has a confining section  151  extending toward the interior of the vertical water tank  10  and a guiding section  152  extending outward from the vertical water tank  10 . The confining section  151  can confine the float balls  60  in a region on the surface of water. An automatic water supply device  16  is installed at the opening of the vertical water tank  10  and used to control the water level. A rotary control device  17  is installed at one end of the guiding section  152  and used to guide the movement of the float balls  60 . 
     The propulsive device  20  is a hollow structure having a holding portion  21  to receive the float balls  60  and an inlet  22  at a lateral thereof. The propulsive device  20  has one end coupled to the aperture  12  to interconnect with the vertical water tank  20 . The propulsive device  20  has a hydraulic propeller  23  at the other end. The propulsive device  20  is tilted upward to the hydraulic propeller  23 , whereby the float balls  60  are gathered in the region near the aperture  12  of the vertical water tank  10 . 
     The guiding device  30  has two rotary wheels  31 . A first transmission belt  32  is wound around the two rotary wheels  31 . A plurality of guiding elements  33  are installed on the first transmission belt  32 . The guiding device  30  is located above the guiding section  152 . The guiding device  30  has one end fixedly installed at the opening of the vertical water tank  10 . The guiding elements  33  can push and guide the float balls  60  to move along the guiding section  152 . 
     The carrying device  40  has an upper wheel assembly  41  and a lower wheel assembly  42 . The upper wheel assembly  41  and the lower wheel assembly  42  are respectively installed at a high position and a low position opposite to the high position. The lower wheel assembly  42  is located above the inlet  22  of the propulsive device  20 . The upper wheel assembly  41  has an upper wheel  411  and a coupling wheel  412  coaxial with the upper wheel  411 . The lower wheel assembly  42  has a lower wheel  421  and a driving gear  422  coaxial with the lower wheel  421 . A second transmission belt  43  is wound around the upper wheel  411  and the lower wheel  421 . A plurality of carrying elements  44  are installed on the second transmission belt  43  and used to hold the float balls  60  moving from a high position to a low position. A coupling transmission belt  45  is wound around the coupling wheel  412  and one rotary wheel  31  of the guiding device  30 , whereby the rotation of the carrying device  40  can drive the guiding device  30  to rotate. 
     The power generation device  50  has a speed-change gear assembly  51  and a generator  52  coupled to the speed-change gear assembly  51 . The speed-change gear assembly  51  is engaged with the driving gear  422  of the carrying device  40 , whereby the rotation of the driving gear  422  can rotate the speed-change gear assembly  51  to drive the generator  52  to generate electric energy. 
     As shown in  FIG. 3 , when the float balls  60  are placed on the carrying elements  44  of the carrying device  40 , the gravity moves the float balls  60  downward from a high position to a low position and drives the second transmission belt  43  to rotate counterclockwise. The rotated second transmission belt  43  drives the upper and lower wheel assemblies  41  and  42  to rotate counterclockwise also. The driving gear  422  of the rotated lower wheel assembly  42  rotates the speed-change gear assembly  51  and drives the generator  52  to generate electric power for use or storage. The speed-change gear assembly  51  can increase the rotational speed to enhance the efficiency of power generation. 
     Refer to  FIG. 4 ,  FIG. 5A  and  FIG. 5B . The float balls  60  are moved from a high position to a lower position by gravity and then dropped into the inlet  22  of the propulsive device  20  below the carrying device  40 . As the propulsive device  20  is tilted, the float balls are collected in the holding portion  21  spontaneously. When the float balls  60  are accumulated to a given quantity, the hydraulic propeller  23  is propelled to open the block plate  13  toward the aperture  12  of the vertical water tank  10 . Thus, the float balls  60  are pushed into the vertical water tank  10  fully filled with water. As the specific gravity of the float balls  60  is smaller than that of water, the float balls  60  float to the opening of the vertical water tank  10  spontaneously. As mentioned above, the block plate  13  is tilted toward the bottom of the vertical water tank  10 , the float balls  60  can easily enter into water once the float balls  60  push the block plate  13  to open slightly. When the float balls  60  no more push the block plate  13 , the torsion spring  14 , which is installed in the pivot of the block plate  13 , automatically restores to close the block plate  13 . 
     Refer to  FIG. 6 . As mentioned above, the coupling transmission belt  45  is wound around the coupling wheel  412  of the upper wheel assembly  41  and one rotary wheel  31  of the guiding device  30 . When the upper wheel assembly  41  of the carrying device  40  is driven to rotate counterclockwise, the rotary wheel  31  of the guiding device  30  is rotated counterclockwise. Thus, the guiding elements  33  on the first transmission belt  32  also are moved counterclockwise and moved to the position where the float balls  60  are gathered by the confining section  151  and can be pushed and guided by the guiding elements  33 . Thus, the guiding elements  33  can guide and push the float balls  60  to move along the guiding section  152  to drop onto the carrying elements  44  of the carrying device  40 . Then, the float balls  60  are moved from the high position to the low position once again. Thereby, the present invention can cyclically generate electric power by utilizing gravity. 
     An automatic water supply device  16  is installed at the opening of the vertical water tank  10  and used to control the water level. A rotary control device  17  is installed at one end of the guiding section  152  to increase the smoothness of guiding the float balls  60  from the guiding device  30  into the carrying elements  44  of the carrying device  40 . The rotary control device  17  can also adjust the number of the float balls  60  delivered into the carrying elements  44 , whereby each carrying element  44  can hold a constant number of the float balls  60 , wherefore the carrying elements  44  are descended by gravity and moved to drive the driving gear  422  to rotate at a constant speed. Thus, stable power output is provided to drive the generator  52  to generate electric power. 
     The present invention can generate electric power via merely using the vertical water tank  10 , propulsive device  20 , guiding device  30 , carrying device  40  and power generation device  50 . Thus, the present invention needs a cost lower than that of a wind generator, a hydroelectric generator, or a solar generator. Therefore, the present invention has considerable industrial competitiveness.