Improved water turbine for hydroelectric power plants

Abstract

The utility model discloses an improved water turbine for hydropower station, including the entrance, install the primary filter screen at the entrance, the rear end seal connection spiral water inlet pipe of entrance, is provided with the water turbine storehouse at the end of spiral water inlet pipe, the bottom of water turbine storehouse is sleeved with the outlet pipe, the primary filter screen with spiral water inlet pipe is provided with the filter between, is provided with the secondary filter screen at the front end of filter, the inside vertical of filter is provided with the water collecting pipe, and the water collecting pipe has the hollow water collecting pipe shell, and a plurality of filter sticks are symmetrically arranged on the water collecting pipe shell, and the filter stick is communicated with the water collecting pipe shell, and the end of water collecting pipe shell is provided with the water outlet, and the water outlet is connected with spiral water inlet pipe, and the top of filter stick is provided with the filter hole, the utility model can improve the deficiency of prior art, and the cumbersome link of cleaning filtration is improved.

Description

Technical Field

[0001] This invention relates to a hydroelectric power generation device, and more particularly to an improved hydroelectric power station turbine. Background Technology

[0002] A power plant turbine is a type of power machinery that converts the momentum of water flow into electrical energy. It belongs to the category of turbine machinery in fluid machinery. The turbine runner rotates due to the impact of the water flow. During operation, the pressure of the water flow remains constant, and the main process is the conversion of kinetic energy. The existing turbine structure is simple in the filtration process and cannot achieve fine filtration. Adding a filtration device would bring too much workload to maintenance. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an improved water turbine for hydropower stations, which can overcome the shortcomings of the prior art and improve the efficiency of maintenance of filtration devices.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows.

[0005] An improved water turbine for a hydroelectric power station includes an inlet, a primary filter screen installed at the inlet, a spiral inlet pipe sealed at the rear end of the inlet, a turbine chamber at the end of the spiral inlet pipe, and an outlet pipe fitted at the bottom of the turbine chamber. A filter is installed between the primary filter screen and the spiral inlet pipe, and a secondary filter screen is installed at the front end of the filter. A water collecting pipe is longitudinally arranged inside the filter, and the water collecting pipe has a hollow outer shell. Several filter rods are symmetrically arranged on the upper and lower parts of the water collecting pipe shell, and the filter rods are connected to the outer shell. An outlet is provided at the end of the outer shell, and the outlet is connected to the spiral inlet pipe. Filter holes are provided at the top of the filter rods.

[0006] Preferably, a three-stage filter screen is installed at the top of the filter hole, and a cylinder is installed inside the filter hole via a bracket. The three-stage filter screen includes a lower flexible filter screen and an upper frame. Several guide vanes are shaft-connected to the frame. A flexible top plate is provided on the top of the cylinder piston head, which contacts the flexible filter screen. The guide vanes are fixedly connected to a first connecting rod, and the first connecting rod meshes with a second connecting rod. The second connecting rod is connected to the filter hole via a spring. The side wall of the second connecting rod is provided with an inclined surface. The cylinder is connected to a drive rod. When the cylinder drives the drive rod to contact the inclined surface, the drive rod drives the second connecting rod to move. The second connecting rod drives the guide vanes to rotate through the first connecting rod, rotating the guide vanes to a vertical state. When the cylinder drives the drive rod to retract, the spring resets the first connecting rod, and the guide vanes return to the inclined state.

[0007] Preferably, when the guide vane is rotated to a vertical position, the bottom end of the guide vane contacts the flexible filter screen, and a number of flexible protrusions are evenly arranged on the surface of the flexible top plate, with an elastic support wrapped inside the flexible protrusions.

[0008] Preferably, the guide vane has an upward-curved guide portion at one end near the flexible filter screen, and the thickness of the guide portion gradually increases from the inner side of the guide vane to the end of the guide vane.

[0009] Preferably, the front end of the filter is provided with a passive rotating blade, and the inside of the water collection pipe housing is provided with a coaxial connecting rod connected to the passive rotating blade, and a drainage rotating blade is provided on the coaxial connecting rod.

[0010] Preferably, the filter is provided with a filter housing on the outside, and a diversion pipe connected to the water outlet pipe is provided on the outside of the filter and on the filter housing, and a switch valve is provided on the diversion pipe.

[0011] The beneficial effects of adopting the above technical solution are as follows: The present invention is equipped with a primary filter screen to filter out larger river debris. A filter screen is set after the primary filter screen, and a secondary filter screen is set in front of the filter screen. The secondary filter screen can filter out medium-sized river debris again. When the water flows into the filter, it enters the water collection pipe through the filter rod. The filter holes of the filter rod are used to filter out fine silt. The filter port can be cleaned without disassembling the overall structure. A passive rotating blade is set in front of the filter. The rotating blade is driven by the water flow to start rotating, which can provide power for the drainage rotating blade. The water flowing into the water collection pipe can effectively improve the sewage discharge efficiency under the disturbance of the drainage rotating blade. During the sewage discharge process, the switch valve at the diversion pipe opening opens, and the water flows into the outlet pipe of the water turbine chamber and is discharged away without entering the water turbine chamber, which provides good protection. Attached Figure Description

[0012] Figure 1 This is a structural diagram of a specific embodiment of the present invention.

[0013] Figure 2 This is a structural diagram of the internal structure of the filter in a specific embodiment of the present invention.

[0014] Figure 3 This is a structural diagram of a water filter rod in a specific embodiment of the present invention.

[0015] Figure 4 This is a structural diagram of the inside of the filter hole in a specific embodiment of the present invention.

[0016] Figure 5 This is a partially enlarged view of the guide portion in a specific embodiment of the present invention. Detailed Implementation

[0017] Reference Figure 1-5One specific embodiment of the present invention includes an inlet 1, a primary filter screen 2 installed at the inlet 1, a spiral water inlet pipe 5 sealed to the rear end of the inlet 1, a water turbine chamber 6 provided at the end of the spiral water inlet pipe 5, and a water outlet pipe 7 sleeved at the bottom of the water turbine chamber 6. A filter 3 is provided between the primary filter screen 2 and the spiral water inlet pipe 5, and a secondary filter screen 12 is provided at the front end of the filter 3. A water collecting pipe 9 is longitudinally arranged inside the filter 3, and the water collecting pipe 9 has a hollow water collecting pipe shell 13. Several water filter rods 10 are symmetrically arranged on the upper and lower parts of the water collecting pipe shell 13, and the water filter rods 10 are connected to the water collecting pipe shell 13. A water outlet 11 is provided at the end of the water collecting pipe shell 13, and the water outlet 11 is connected to the spiral water inlet pipe 5. A filter hole 18 is provided at the top of the water filter rod 10. A filter housing 8 is provided on the outside of the filter 3, and a diversion pipe 16 connected to the water outlet pipe 7 is provided on the outside of the filter 3 and on the filter housing 8. A switch valve 17 is provided on the diversion pipe 16.

[0018] Water flows through the inlet to the primary filter screen 2, which blocks larger debris from the river channel and protects the passively rotating blades 4. After passing through the primary filter screen 2, the water undergoes a second filtration by the secondary filter screen 12. At this point, the water carries only silt and flows into the filter 3. Inside the filter housing 8, the water flows towards the filter rod 10, filtering out the silt through the filter holes 18. Driven by the drainage fan blades 14, the water accelerates and flows into the outlet 11, entering the turbine chamber 6. In the turbine chamber 6, the water flow drives the turbine blades to rotate, which in turn drives the generator (not shown in the figure) to generate electricity. Finally, the water flows out from the outlet pipe 7. The primary filter screen 2 only needs to be cleaned periodically by removing debris from the outside. Cleaning the secondary filter screen 12 only requires opening the diversion pipe 16 connected to the outside of the filter 3, allowing debris on the outside of the secondary filter screen 12 to be flushed out through the diversion pipe 16.

[0019] A three-stage filter screen 19 is installed at the top of the filter hole 18. A cylinder 21 is installed inside the filter hole 18 via a bracket 20. The three-stage filter screen 19 includes a lower flexible filter screen 22 and an upper frame 23. Several guide vanes 24 are shaft-connected to the frame 23. A flexible top plate 33 is provided on the top of the piston head of the cylinder 21, which contacts the flexible filter screen 22. The guide vanes 24 are fixedly connected to the first connecting rod 25. The first connecting rod 25 meshes with the second connecting rod 26. The second connecting rod 26 communicates with the filter hole 18 via... A spring 27 connects to the second connecting rod 26, whose side wall has an inclined section 28. A cylinder 21 is connected to a drive rod 29. When the cylinder 21 drives the drive rod 29 to contact the inclined section 28, the drive rod 29 drives the second connecting rod 26 to move. The second connecting rod 26 drives the guide vane 24 to rotate through the first connecting rod 25, rotating the guide vane 24 to a vertical position. When the cylinder 21 drives the drive rod 29 to retract, the spring 27 resets the first connecting rod 25, and the guide vane 24 returns to its inclined position. When the guide vane 24 rotates to a vertical position, the bottom end of the guide vane 24 contacts the flexible filter screen 22. The surface of the flexible top plate 33 is uniformly provided with several flexible protrusions 30, and the flexible protrusions 30 are covered with elastic supports 31. The end of the guide vane 24 near the flexible filter screen 22 is provided with an upward-curved guide portion 32. The thickness of the guide portion 32 gradually increases from the inner side of the guide vane 24 to the end of the guide vane 24.

[0020] When the three-stage filter screen 19 needs cleaning, cylinder 21 is activated. Cylinder 21 drives the flexible top plate 33 to rapidly impact and vibrate the flexible filter screen 22. Simultaneously, cylinder 21 drives the drive rod 29 to squeeze the inclined section 28, which in turn drives the first connecting rod 25 to rotate via the second connecting rod 26, achieving synchronous reciprocating tumbling of the guide vanes 24. Through the tumbling of the guide vanes 24 and the vibration and scraping of both sides of the flexible filter screen 22 by the guide vanes 24 and the flexible top plate 33, the flexible filter screen 22 is quickly cleaned, and the cleaned silt is discharged through the diversion pipe 16. During normal filtration, the guide vanes 24 are in an inclined state, mutually blocking each other, which can guide the water flow, preventing the water flow from directly impacting the flexible filter screen 22 vertically, thus improving the filtration effect of the flexible filter screen 22. The guide section 32 can guide the water flow outward, creating a turbulent zone near the top surface of the flexible filter screen 22, further improving the filtration effect of the flexible filter screen 22.

[0021] The front end of the filter 3 is provided with a passive rotating blade 4, and the inside of the water collection pipe housing 13 is provided with a coaxial connecting rod 15 connected to the passive rotating blade 4. A drainage rotating blade 14 is provided on the coaxial connecting rod 15.

[0022] The water flow drives the passive rotating blade 4 to rotate, and at the same time, the passive rotating blade 4 drives the coaxial connecting rod 15 to rotate, thereby causing the drainage rotating blade 14 to rotate. The rotation of the passive rotating blade 4 in conjunction with the drainage rotating blade 14 can effectively enhance the water flow's ability to flush away impurities and improve sewage discharge efficiency.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An improved water turbine for a hydroelectric power station, comprising an inlet (1), a primary filter (2) installed at the inlet (1), a spiral inlet pipe (5) sealed to the rear end of the inlet (1), a turbine housing (6) provided at the end of the spiral inlet pipe (5), and an outlet pipe (7) sleeved at the bottom of the turbine housing (6), characterized in that: A filter (3) is provided between the primary filter screen (2) and the spiral inlet pipe (5), and a secondary filter screen (12) is provided at the front end of the filter (3); a water collection pipe (9) is arranged vertically inside the filter (3), and the water collection pipe (9) has a hollow water collection pipe shell (13). Several filter rods (10) are symmetrically arranged on the upper and lower parts of the water collection pipe shell (13), and the filter rods (10) are connected to the water collection pipe shell (13). An outlet (11) is provided at the end of the water collection pipe shell (13), and the outlet (11) is connected to the spiral inlet pipe (5). The water inlet pipe (5) is connected, and the top of the filter rod (10) is provided with a filter hole (18); a three-stage filter screen (19) is installed on the top of the filter hole (18), and a cylinder (21) is installed in the filter hole (18) through a bracket (20). The three-stage filter screen (19) includes a lower flexible filter screen (22) and an upper frame (23). Several guide vanes (24) are shaft-connected to the frame (23). The top of the piston head of the cylinder (21) is provided with a flexible top plate (33) that contacts the flexible filter screen (22). (24) is fixedly connected to the first connecting rod (25), the first connecting rod (25) meshes with the second connecting rod (26), the second connecting rod (26) is connected to the filter hole (18) by a spring (27), the side wall of the second connecting rod (26) is provided with a beveled part (28), the cylinder (21) is connected to the drive rod (29), when the cylinder (21) drives the drive rod (29) to contact the beveled part (28), the drive rod (29) drives the second connecting rod (26) to move, the second connecting rod (26) is connected to the first connecting rod (25) by a spring (27), the second connecting rod (26) is connected to the filter hole (18) by a spring (28), the second connecting rod (25) is connected to the filter hole (18 ...8), the second connecting rod (25) is connected to the filter hole (18) by a spring (28), the second connecting rod (25) is connected to the filter hole (18) by a spring (28), the second connecting rod (25) is connected to the filter hole (18) by a spring (28), the second connecting rod (25) is connected to the filter hole (18) by a spring (28), the second connecting rod (25) is connected to the filter hole (18) by a spring (28), the second connecting rod (25) is connected to the filter hole The cylinder (21) drives the guide vane (24) to rotate, and rotates the guide vane (24) to a vertical position. When the cylinder (21) drives the drive rod (29) to retract, the spring (27) resets the first connecting rod (25), and the guide vane (24) returns to the tilted position. When the guide vane (24) rotates to a vertical position, the bottom end of the guide vane (24) contacts the flexible filter screen (22). The surface of the flexible top plate (33) is uniformly provided with several flexible protrusions (30), and the flexible protrusions (30) are covered with elastic supports (31).

2. The improved hydropower station turbine according to claim 1, characterized in that: The guide vane (24) has an upturned guide portion (32) at one end near the flexible filter screen (22), and the thickness of the guide portion (32) gradually increases from the inner side of the guide vane (24) to the end of the guide vane (24).

3. The improved hydropower station turbine according to claim 2, characterized in that: The filter (3) is provided with a passive rotating blade (4) at the front end, and a coaxial connecting rod (15) connected to the passive rotating blade (4) is provided inside the water collection pipe shell (13), and a drainage rotating blade (14) is provided on the coaxial connecting rod (15).

4. The improved hydropower station turbine according to claim 1, characterized in that: The filter (3) is provided with a filter housing (8) on the outside. A diversion pipe (16) connected to the water outlet pipe (7) is provided on the outside of the filter (3) and on the filter housing (8). A switch valve (17) is provided on the diversion pipe (16).

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