A high efficiency water cycle power generation device

Abstract

This utility model relates to the field of hydropower technology and provides a high-efficiency water-circulation power generation device, including a water circulation device. The water circulation device includes, from high to low, a relay water tank, a balance water tank, an energy storage water tank, a tailrace water tank, and a pneumatic component. The pneumatic component includes an air storage tank and a water lifting tank. A water hammer pump is installed in the tailrace water tank. The energy storage water tank is connected to the tailrace water tank through an inlet pipe. A water pump is installed in the balance water tank. The air chamber in the water hammer pump contracts or expands with the fluctuation of the water flow in the water hammer pump. The air chamber controls the change of air pressure inside the water lifting pipe through the connected air storage tank. The tailrace water in the tailrace water tank automatically enters the water lifting tank under the action of gravity. With the change of air pressure in the water lifting tank, the water in the water lifting tank flows to the balance water tank under the action of air pressure. The balance water tank can reduce the working height of the water pump, so that the water flow can be pumped to the relay water tank without the need for a large-power water pump. By reducing the power consumption of the water pump, the overall output power is increased.

Description

Technical Field

[0001] This utility model relates to the field of hydropower technology, and in particular to a high-efficiency water circulation power generation device. Background Technology

[0002] Hydropower generation technology is relatively mature. It mainly uses impellers and generators to convert the mechanical energy of water flow into electrical energy to supply electricity for daily life and production. However, because the power generation device is highly dependent on water flow and requires a continuous flow of water to generate electricity, and because there are dry seasons in nature, the water flow during the dry season may not be able to support the normal power generation of the device, so this type of device is difficult to use on a large scale.

[0003] Chinese utility model patent CN202323169772.1 discloses a water-circulating power generation device, including a power generation mechanism and a water circulation mechanism. The water circulation mechanism includes a return pool, a power supply pool, a water supply pool, a primary energy storage pool, and a secondary energy storage pool. The water flow in the secondary energy storage pool relies on the gravitational potential energy to impact the impeller to rotate. The impeller drives the main generator to generate electricity. The water flow that loses its potential energy gathers in the return pool and is then sent to the power supply pool through a water pipe. The water flow is pumped to the primary energy storage pool by a water pump. The water flow in the primary energy storage pool relies on the potential energy generated by the drop to impact the water hammer pump, which pumps the water flow to the secondary energy storage pool. The water flow is repeatedly used to impact the impeller to generate electricity, thereby achieving the purpose of cyclic operation.

[0004] When a water hammer pump delivers water to a higher pool, since the pump cannot achieve 100% efficiency, an additional water pump must be installed to pump all the water to the higher pool. This additional water pump then carries the tailwater from the water hammer pump to the higher location. Because the water pump requires current generated by the water circulation system to drive it, if the distance between the higher pool and the water pump is too great, the power of the water pump also needs to be increased accordingly, resulting in a decrease in the overall power output of the water circulation system. Therefore, a water circulation power generation device that can reduce internal energy consumption is needed to increase the overall power output. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency water circulation power generation device to reduce the energy consumption caused by internal water pumping and increase the overall output power of existing water circulation power generation devices.

[0006] To achieve the above objectives, this utility model provides a high-efficiency water-circulation power generation device, including a water circulation device. The water circulation device includes, from high to low, a relay water tank, a balance water tank, an energy storage water tank, and a tailrace water tank. It also includes a pneumatic assembly, which includes an air storage tank and a water lifting tank. A water hammer pump is installed in the tailrace water tank. The energy storage water tank is connected to the tailrace water tank through an inlet pipe. The water hammer pump is connected to the tailrace water tank. The tailrace water tank is connected to the water lifting tank through a guide pipe. The water lifting tank is equipped with a water lifting pipe, which is connected to the balance water tank. A water pump is installed in the balance water tank. Both the water pump and the water hammer pump are connected to a water lifting pipe, which is connected to the relay water tank. The relay water tank is connected to an outlet pipe, the outlet of which is located in the energy storage water tank. An air chamber is installed in the water hammer pump. The air storage tank is connected to both the air chamber and the water lifting tank.

[0007] Furthermore, an auxiliary water pipe is installed on the water lifting tank, and a one-way valve is installed on the auxiliary water pipe. One end of the auxiliary water pipe is close to the bottom of the water lifting tank, and the other end of the auxiliary water pipe is connected to the relay water tank.

[0008] Furthermore, an impeller assembly is installed at the end of the water outlet pipe, and the impeller assembly is connected to a generator set, which is connected to the control grid; a secondary generator is also installed at the bottom of the impeller assembly.

[0009] Furthermore, one-way valves are installed on the water supply pipe, the diversion pipe, and the lifting pipe.

[0010] Furthermore, the height difference between the energy storage tank and the tailrace tank is h1, 4m≤h1≤6m; the length of the inlet pipe is L1, 27m≤L1≤32m.

[0011] Furthermore, a water turbine pump is installed in the energy storage tank, and a return water pipe is installed on the water turbine pump. The outlet end of the return water pipe is located on the relay water tank, and the bottom of the water turbine pump is connected to the inlet water pipe.

[0012] Furthermore, the water lifting tank is located below the tailrace pool, and the height difference between the water lifting tank and the tailrace pool is h2, 0.5m≤h2≤2m; the height difference between the balance pool and the tailrace pool is h3, 1m≤h3≤10m.

[0013] Furthermore, the height difference between the tailrace pool and the intermediate pool is h4, where 12m ≤ h4 ≤ 18m.

[0014] The high-efficiency water circulation power generation device provided by this utility model, compared with the prior art, has an air chamber in the water hammer pump that contracts or expands with the fluctuation of the water flow in the water hammer pump. The contraction or expansion of the air chamber controls the change of air pressure inside the water lifting pipe through a connected air storage tank. The tailwater in the tailwater pool automatically enters the water lifting tank under the action of gravity. With the change of air pressure in the water lifting tank, the water in the water lifting tank will flow to the balance water tank under the action of air pressure. The balance water tank can reduce the working height of the pump, so that the water flow can be pumped to the relay water tank without the need for a large-power pump. By reducing the power consumption of the pump, the overall output power is increased. Attached Figure Description

[0015] Figure 1 This is a structural view of the present invention;

[0016] Figure 2 This is a structural view of the water circulation device of this utility model;

[0017] Figure 3 This is a structural view of the pneumatic component in this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] The components include: 1. Energy storage tank; 2. Tailwater tank; 20. Water hammer pump; 21. Air chamber; 3. Balance tank; 30. Pump; 4. Relay tank; 5. Pneumatic components; 50. Air storage tank; 51. Water lifting tank; 6. Inlet pipe; 60. Water turbine pump; 61. Guide pipe; 62. Lifting pipe; 63. Auxiliary pipe; 64. Pumping pipe; 65. Outlet pipe; 66. Return pipe; 7. Impeller assembly; 70. Generator set; 71. Control grid; 72. Secondary generator; 8. Check valve. Detailed Implementation

[0020] The present invention will be described in detail below with reference to specific embodiments.

[0021] In this utility model, unless otherwise explicitly specified and limited, when terms such as "set in," "connected," or "linked" appear, these terms should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or a connection through one or more intermediate media. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The directional terms appearing in this utility model are for the purpose of better describing the characteristics of the features and the relationships between them. It should be understood that when the placement direction of this utility model changes, the direction of the characteristics of the features and the relationships between them also changes accordingly. Therefore, directional terms do not constitute an absolute limitation on the characteristics of the features and the relationships between them in space, but only a relative limitation.

[0022] like Figures 1 to 3 As shown, this utility model provides a high-efficiency water circulation power generation device, including a water circulation device. The water circulation device includes, from high to low, a relay water tank 4, a balancing water tank 3, an energy storage water tank 1, and a tailrace water tank 2. It also includes a pneumatic assembly 5, which includes an air storage tank 50 and a water lifting tank 51. A water hammer pump 20 is installed in the tailrace water tank 2. The energy storage water tank 1 is connected to the tailrace water tank 2 through an inlet pipe 6. The water hammer pump 20 is connected to the tailrace water tank 2. The tailrace water tank 2 is connected to the water lifting tank 51 through a guide water pipe 61. A water lifting pipe 62 is installed on 51, which is connected to the balance water tank 3. A water pump 30 is installed in the balance water tank 3. Both the water pump 30 and the water hammer pump 20 are connected to a water lifting pipe 64, which is connected to the relay water tank 4. The relay water tank 4 is connected to a water outlet pipe 65, and the outlet of the water outlet pipe 65 is located in the energy storage water tank 1. An air chamber 21 is installed in the water hammer pump 20, and an air storage tank 50 is connected to the air chamber 21 and the water lifting tank 51 respectively.

[0023] With the above design scheme, the water in the energy storage tank 1 flows to the water hammer pump 20 under the action of gravity. Under the action of the water hammer effect, the water hammer pump 20 pumps part of the water flow to the relay tank 4. The tailwater generated by the water hammer pump 20 will be collected in the tailwater tank 2. The collected tailwater will then flow from the tailwater tank 2 to the lifting tank 51. The water in the lifting tank 51 is pumped to the balance tank 3 with the assistance of air pressure. Finally, the water will be pumped to the relay tank 4 by the pump 30. The water hammer pump 20 and the water pump 30 work together to guide all the water flowing out of the energy storage tank 1 to the relay tank 4. The water then flows back into the energy storage tank 1 under the action of gravity. Because of the large drop between the energy storage tank 1 and the relay tank 4, the water flowing out of the relay tank 4 has a large kinetic energy, which can be used to impact the power generation device to generate electricity. The water that loses its kinetic energy will fall into the energy storage tank 1. The water that falls into the energy storage tank 1 will then flow back to the relay tank 4 through the water circulation device to continuously participate in the power generation operation and realize cyclic power generation.

[0024] In this embodiment, an auxiliary water pipe 63 is provided on the water lifting tank 51, and a one-way valve 8 is provided on the auxiliary water pipe 63. One end of the auxiliary water pipe 63 is close to the bottom of the water lifting tank 51, and the other end of the auxiliary water pipe 63 is connected to the relay water tank 4.

[0025] With the above design scheme, when the water hammer pump 20 lifts water, the air pressure in the air storage tank 50 changes, and at the same time, the air pressure in the connected water lifting tank 51 also changes. When the air pressure in the water lifting tank 51 is too low, the water flow in the tailwater pool 2 will be sucked into the water lifting tank 51; when the air pressure in the water lifting tank 51 is too high, the water flow in the water lifting tank 51 will flow through the auxiliary water pipe 63 and the water lifting pipe 62 to the relay water pool 4 and the balance water pool 3 respectively under the action of air pressure.

[0026] In this embodiment, an impeller assembly 7 is provided at the end of the water outlet pipe 65, and a generator set 70 is connected to the impeller assembly 7. The generator set 70 is connected to the control power grid 71. A secondary generator 72 is also provided at the bottom of the impeller assembly 7.

[0027] With the above design, the impeller assembly 7 at the end of the outlet pipe 65 rotates under the impact of the water flow. The rotating impeller assembly 7 drives the generator set 70 to generate electricity. The electricity generated by the generator set 70 is connected to the grid through the control grid 71, and part of the current is used to drive the water pump 30. The secondary generator 72 can further utilize the tailwater after it has impacted the impeller assembly 7, further improving the power generation efficiency.

[0028] In this embodiment, one-way valves 8 are provided on the water supply pipe 64, the guide pipe 61, and the lifting pipe 62.

[0029] Through the above design scheme, the one-way valve 8 is used to restrict the direction of water flow and prevent water backflow.

[0030] In this embodiment, the height difference between the energy storage tank 1 and the tailrace tank 2 is h1, where 4m ≤ h1 ≤ 6m; the length of the inlet pipe 6 is L1, where 27m ≤ L1 ≤ 32m.

[0031] In this embodiment, a water turbine pump 60 is installed in the energy storage tank 1, and a return water pipe 66 is installed on the water turbine pump 60. The outlet end of the return water pipe 66 is located on the relay water tank 4, and the bottom of the water turbine pump 60 is connected to the inlet water pipe 6.

[0032] In this embodiment, the water turbine pump 60 has two stages of impellers. When the water flow impacts the first stage impeller, the second stage impeller will be passively rotated. The rotating second stage impeller can pump the water flow to a higher place, thereby completing the pumping work.

[0033] With the above design scheme, the water flow that loses kinetic energy after impacting the impeller assembly 7 will accumulate in the energy storage tank 1. When the water flow out of the energy storage tank 1, it will impact the water turbine pump 60. The water turbine pump 60 will pump part of the water flow to the relay tank 4 through the return water pipe 66, reducing the burden on the pump 30 in the water circulation system.

[0034] In this embodiment, the water lifting tank 51 is located below the tailwater pool 2, and the height difference between the water lifting tank 51 and the tailwater pool 2 is h2, 0.5m≤h2≤2m; the height difference between the balancing water pool 3 and the tailwater pool 2 is h3, 1m≤h3≤10m.

[0035] In this embodiment, the height difference between tailrace pool 2 and relay pool 4 is h4, where 12m≤h4≤18m.

[0036] The high-efficiency water circulation power generation device provided by this utility model, compared with the prior art, has an air chamber 21 in the water hammer pump 20 that contracts or expands with the fluctuation of the water flow in the water hammer pump 20. The contraction or expansion of the air chamber 21 controls the change of air pressure inside the water lifting pipe 62 through the connected air storage tank 50. The tailwater in the tailwater pool 2 will automatically enter the water lifting tank 51 under the action of gravity. With the change of air pressure in the water lifting tank 51, the water flow in the water lifting tank 51 will flow to the balance water pool 3 under the action of air pressure. The balance water pool 3 can reduce the working height of the pump 30, so that the water flow can be pumped to the relay water pool 4 without the need for a large power pump 30. The overall output power is increased by reducing the power consumption of the pump 30.

[0037] Where there is no conflict, the above embodiments and features can be combined with each other.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A high-efficiency water-circulating power generation device, comprising a water-circulating device, characterized in that: The water circulation device, from high to low, includes a relay water tank (4), a balance water tank (3), an energy storage water tank (1), and a tailrace water tank (2), and also includes a pneumatic assembly (5), which includes an air storage tank (50) and a water lifting tank (51); a water hammer pump (20) is installed in the tailrace water tank (2), the energy storage water tank (1) is connected to the tailrace water tank (2) through an inlet pipe (6), the water hammer pump (20) is connected to the tailrace water tank (2), the tailrace water tank (2) is connected to the water lifting tank (51) through a guide water pipe (61), and the water lifting tank (51) is equipped with a water hammer pump (20). A water lifting pipe (62) is provided, which is connected to a balance water tank (3). A water pump (30) is provided in the balance water tank (3). A water lifting pipe (64) is connected to both the water pump (30) and the water hammer pump (20). The water lifting pipe (64) is connected to the relay water tank (4). The relay water tank (4) is connected to an outlet pipe (65). The outlet of the outlet pipe (65) is located in the energy storage water tank (1). An air chamber (21) is provided in the water hammer pump (20). An air storage tank (50) is connected to the air chamber (21) and the water lifting tank (51) respectively.

2. The high-efficiency water-circulating power generation device according to claim 1, characterized in that: An auxiliary water pipe (63) is installed on the water lifting tank (51), and a one-way valve (8) is installed on the auxiliary water pipe (63). One end of the auxiliary water pipe (63) is close to the bottom of the water lifting tank (51), and the other end of the auxiliary water pipe (63) is connected to the relay water tank (4).

3. The high-efficiency water-circulation power generation device according to claim 1, characterized in that: An impeller assembly (7) is provided at the end of the water outlet pipe (65), and a generator set (70) is connected to the impeller assembly (7). The generator set (70) is electrically connected to the control grid (71). A secondary generator (72) is also provided at the bottom of the impeller assembly (7).

4. A high-efficiency water-circulating power generation device according to claim 1, characterized in that: One-way valves (8) are installed on the water supply pipe (64), the diversion pipe (61) and the lifting pipe (62).

5. A high-efficiency water-circulating power generation device according to claim 1, characterized in that: The height difference between the energy storage tank (1) and the tailrace tank (2) is h1, 4m≤h1≤6m; the length of the inlet pipe (6) is L1, 27m≤L1≤32m.

6. A high-efficiency water-circulating power generation device according to claim 1, characterized in that: A water turbine pump (60) is installed in the energy storage tank (1). A return water pipe (66) is installed on the water turbine pump (60). The outlet end of the return water pipe (66) is located on the relay tank (4). The bottom of the water turbine pump (60) is connected to the inlet pipe (6).

7. A high-efficiency water-circulating power generation device according to claim 1, characterized in that: The water lifting tank (51) is located below the tailwater pool (2). The height difference between the water lifting tank (51) and the tailwater pool (2) is h2, 0.5m≤h2≤2m; the height difference between the balance pool (3) and the tailwater pool (2) is h3, 1m≤h3≤10m.

8. A high-efficiency water-circulating power generation device according to claim 1, characterized in that: The height difference between the tailrace pool (2) and the intermediate water pool (4) is h4, 12m≤h4≤18m.

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