A photovoltaic water pumping device
Through a mechanical positive and negative current switching device, the intermittent contact and magnetic field switching between the rotating arm and the conductive rod are utilized to solve the problems of high cost and high failure rate of controllers in existing photovoltaic water pumping systems, and low-cost, high-reliability current switching is achieved.
Patent Information
- Application Number
- CN202211217908.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-30
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2042-09-30
AI Technical Summary
The controllers of existing photovoltaic water pumping systems are expensive and have a high failure rate, making repair and replacement costs too high.
A mechanical positive and negative current switching device is used, including a conversion box and a power box. The current switching is achieved by driving the shaft to rotate through a reduction motor. The mechanical switching of the current direction is achieved by utilizing the intermittent contact between the insulating rotating arm and the conductive rod and the conductive sheet, combined with the magnetic field switching of the suction cup electromagnet and the permanent magnet.
The manufacturing cost and failure rate are reduced, the maintenance cost is reduced, and low-cost and high-reliability current switching is achieved.
Smart Images
Figure CN115642759B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of photovoltaic water pumping, and in particular to a photovoltaic water pumping device. Background Art
[0002] Photovoltaic water pumping converts solar radiation into electrical energy, which is then used to drive a water pump to achieve the effect of pumping water. Solar photovoltaic technology is the most advanced technology in energy utilization and is considered to be one of the most promising new technologies in the future.
[0003] The solar photovoltaic water pumping system consists of photovoltaic panels, a controller, and a photovoltaic water pump. The photovoltaic panels directly convert solar radiation into electrical energy. The controller inverts DC power into AC power, providing variable frequency control and maximum power point tracking for the water pump. The photovoltaic water pump is a multi-stage centrifugal pump with a wide and efficient operating range, equipped with a dedicated solar-powered motor.
[0004] Patent application number 201610263523.4, an energy-saving water pump driven by an electromagnet, includes a guide housing with a closed upper end and an open lower end, a tubular pump housing fixedly connected to the lower end of the guide housing, a pump cover fixedly connected to the lower end of the pump housing, a piston slidably installed in the pump housing, and three electromagnets installed in the guide housing to drive the piston up and down. The three electromagnets include a third electromagnet fixedly installed at the top of the guide housing, and a second electromagnet and a first electromagnet slidably installed in the guide housing, with the first electromagnet located below the second electromagnet. Two guide protrusions are also formed on the insulating outer ring of the second electromagnet at positions different from those of the elastic brushes. The inner wall of the guide housing is also formed with a pair of positioning guide grooves that are slidably connected to the guide protrusions on the second electromagnet.
[0005] Patent application number 201610263523.4 controls the switching of positive and negative currents input to the electromagnet during operation using a microcontroller-based control circuit or a programmable logic controller (PLC). While this controller can satisfy the need for switching currents, currently available controllers are expensive, have a high failure rate, and are prohibitively expensive to repair and replace.
[0006] After a long period of exploration and summary, the applicant proposed a method to achieve positive and negative current switching through mechanical means, which has low manufacturing cost, low failure rate and low maintenance cost. Summary of the Invention
[0007] Aiming at the deficiencies of the prior art, the present invention provides a photovoltaic water pumping device.
[0008] The present invention is achieved through the following technical solution, which provides a photovoltaic water pumping device, including a photovoltaic power generation panel, which is connected to a DC combiner box via a power line. Two positive power output lines and two negative power output lines are connected to the DC combiner box. Each positive power output line and each negative power output line are connected to a positive and negative current switching device. The positive and negative current switching device is connected to a water pump body via a first power input line and a second power input line. The positive and negative current switching device includes a conversion box and a power box. Two sets of switching mechanisms are arranged in an upper and lower manner in the conversion box. Each set of switching mechanisms includes a power input cylinder and a power output cylinder. A conductive ring is installed on the inner wall of the power output cylinder. The two conductive rings of the two sets of switching mechanisms are respectively connected to the water pump body via the first power input line and the second power input line; an arc-shaped positive conductive sheet and an arc-shaped negative conductive sheet are installed on the inner wall of the power input cylinder. The arc-shaped positive conductive sheet and the arc-shaped negative conductive sheet are disconnected. The arc-shaped positive conductive sheet is connected to the positive power output line, and the arc-shaped negative conductive sheet is connected to the negative power output line.
[0009] Preferably, the rotating shaft passes through each power input cylinder and each power output cylinder, and the rotating shaft is connected to the conversion box through a bearing; a reduction motor is installed in the power box, a driving gear is installed on the output shaft of the reduction motor, and a driven gear is installed on the rotating shaft, and the driving gear and the driven gear are meshed.
[0010] Preferably, a first rotating arm and a second rotating arm corresponding to the upper and lower groups of switching mechanisms are fixed to the rotating shaft, both of which are made of insulating material. The first rotating arm and the second rotating arm are located at different heights and are arranged back to back. A first conductive rod is fixed to the first rotating arm. During the rotation of the first conductive rod, the upper end of the first conductive rod is intermittently in contact with its corresponding arc-shaped positive conductive sheet and arc-shaped negative conductive sheet, and the lower end of the first conductive rod is in contact with its corresponding conductive ring.
[0011] Preferably, a second conductive rod is fixed to the second rotating arm, and during the rotation of the second conductive rod, its upper end intermittently contacts its corresponding arc-shaped positive conductive sheet and arc-shaped negative conductive sheet, and its lower end contacts its corresponding conductive ring.
[0012] Preferably, the water pump body includes a shell, and a head-end suction cup electromagnet and a tail-end suction cup electromagnet are respectively installed at the head and tail ends of the shell, the first conductive wiring and the second conductive wiring are connected to the head-end suction cup electromagnet, and the third conductive wiring and the fourth conductive wiring are connected to the tail-end suction cup electromagnet; the first conductive wiring is connected to the first power input wire, the second conductive wiring is connected to the second power input wire, the third conductive wiring is connected to the second power input wire, and the fourth conductive wiring is connected to the first power input wire.
[0013] Preferably, a disc-shaped permanent magnet is provided between the head end suction cup electromagnet and the tail end suction cup electromagnet, and a rubber sleeve is covered on the surface of the disc-shaped permanent magnet, so that the disc-shaped permanent magnet is in close contact with the inner wall of the shell through the rubber sleeve.
[0014] Preferably, a first water inlet one-way valve, a second water inlet one-way valve, a first drain one-way valve and a second drain one-way valve are provided on the shell, and the first water inlet one-way valve and the second water inlet one-way valve are respectively located on both sides of the disc-shaped permanent magnet, and the first drain one-way valve and the second drain one-way valve are respectively located on both sides of the disc-shaped permanent magnet.
[0015] The beneficial effects of the present invention are:
[0016] The positive and negative current switching device adopts a mechanical structure, which can meet the needs of positive and negative current switching, and has low manufacturing cost, low failure rate and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of the working state structure of the present invention;
[0018] Figure 2 This is another structural diagram of a working state of the present invention;
[0019] As shown in the figure:
[0020] 1. Photovoltaic panel, 2. DC combiner box, 3. Positive power output cable, 4. Negative power output cable, 5. Rotating shaft, 6. Conversion box, 7. Power box, 8. Driven gear, 9. Reducer motor, 10. Driving gear, 11. Power input cylinder, 12. Arc-shaped negative conductive sheet, 13. Arc-shaped positive conductive sheet, 14. First conductive rod, 15. First rotating arm, 16. Power output cylinder, 17. Conductive ring, 18. First power input cable, 19. Second power input line, 20. First water inlet one-way valve, 21. Second water inlet one-way valve, 22. Tail-end suction cup electromagnet, 23. First water drain one-way valve, 24. Disc-shaped permanent magnet, 25. Second water drain one-way valve, 26. Housing, 27. Head-end suction cup electromagnet, 28. First conductive connection, 29. Second conductive connection, 30. Third conductive connection, 31. Fourth conductive connection, 32. Second rotating arm, 33. Second conductive rod. DETAILED DESCRIPTION
[0021] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.
[0022] like Figure 1 、 2As shown, the present invention includes a photovoltaic power generation panel 1, which is connected to a DC combiner box 2 through a power line. The photovoltaic power generation panel 1 and the DC combiner box 2 both adopt existing structures. Two positive power output lines 3 and two negative power output lines 4 are connected to the DC combiner box 2. Each positive power output line 3 and each negative power output line 4 are connected to a positive and negative current switching device, and the positive and negative current switching device is connected to the water pump body through a first power input line 18 and a second power input line 19.
[0023] The positive and negative current switching device includes a conversion box 6 and a power box 7. Two sets of switching mechanisms are arranged vertically within the conversion box 6. Each set of switching mechanisms includes a power input cylinder 11 and a power output cylinder 16. A conductive ring 17 is mounted on the inner wall of the power output cylinder 16. The two conductive rings 17 of the two switching mechanisms are connected to the water pump body via a first power input line 18 and a second power input line 19, respectively. An arcuate positive conductive sheet 13 and an arcuate negative conductive sheet 12 are mounted on the inner wall of the power input cylinder 11. The arcuate positive conductive sheet 13 and the arcuate negative conductive sheet 12 are disconnected. The arcuate positive conductive sheet 13 is connected to the positive power output line 3, and the arcuate negative conductive sheet 12 is connected to the negative power output line 4.
[0024] The rotating shaft 5 passes through each power input cylinder 11 and each power output cylinder 16 and is connected to the conversion box 6 via bearings. A reduction motor 9 is mounted within the power box 7. A driving gear 10 is mounted on the output shaft of the reduction motor 9. A driven gear 8 is mounted on the rotating shaft 5, meshing with the driving gear 10 and the driven gear 8. The reduction motor 9 drives the rotating shaft 5 to rotate. In this embodiment, the reduction motor 9 is powered by the DC combiner box 2.
[0025] A first rotating arm 15 and a second rotating arm 32, corresponding to the upper and lower switching mechanisms, are fixed to the rotating shaft 5. Both the first and second rotating arms 15, 32 are made of insulating material, located at different heights and facing each other. A first conductive rod 14 is fixed to the first rotating arm 15. During rotation, the upper end of the first conductive rod 14 intermittently contacts its corresponding arcuate positive conductive sheet 13 and arcuate negative conductive sheet 12, while the lower end of the first conductive rod 14 contacts its corresponding conductive ring 17. A second conductive rod 33 is fixed to the second rotating arm 32. During rotation, the upper end of the second conductive rod 33 intermittently contacts its corresponding arcuate positive conductive sheet 13 and arcuate negative conductive sheet 12, while the lower end of the second conductive rod 33 contacts its corresponding conductive ring 17.
[0026] Driven by the reduction motor 9, the rotating shaft 5 rotates, causing the corresponding first and second conductive rods 14, 33 to rotate accordingly. During rotation, the first and second conductive rods 14, 33 intermittently contact their corresponding arc-shaped positive and negative conductive strips 13, 12, respectively, achieving positive and negative current switching. For example, when the upper end of the first conductive rod 14 contacts the corresponding arc-shaped positive conductive strip 13, the lower end of the first conductive rod 14 contacts its corresponding conductive ring 17, and the upper switching mechanism outputs positive current. Because the first rotating arm 15 and the second rotating arm 32 are arranged in opposite directions, the upper end of the second conductive rod 33 contacts the corresponding arc-shaped negative conductive strip 12, and the lower end of the second conductive rod 33 contacts its corresponding conductive ring 17, causing the lower switching mechanism to output negative current. As the rotating shaft 5 rotates, when the upper end of the first conductive rod 14 rotates to contact the corresponding arc-shaped negative conductive strip 12, the lower end of the first conductive rod 14 contacts its corresponding conductive ring 17, and the upper switching mechanism outputs negative current. At this time, the upper end of the second conductive rod 33 rotates to contact the corresponding arc-shaped positive conductive sheet 13, and the lower end of the second conductive rod 33 contacts the corresponding conductive ring 17, and the lower set of switching mechanisms outputs positive electricity.
[0027] In this embodiment, each power input cylinder 11 and each power output cylinder 16 are made of insulating material.
[0028] The water pump body includes a housing 26, with a head-end suction cup electromagnet 27 and a tail-end suction cup electromagnet 22 mounted at the front and rear ends of the housing 26, respectively. A first conductive connection 28 and a second conductive connection 29 are connected to the head-end suction cup electromagnet 27, while a third conductive connection 30 and a fourth conductive connection 31 are connected to the tail-end suction cup electromagnet 22. The first conductive connection 28 is connected to the first power input line 18, the second conductive connection 29 is connected to the second power input line 19, the third conductive connection 30 is connected to the second power input line 19, and the fourth conductive connection 31 is connected to the first power input line 18. The wiring directions of the head-end suction cup electromagnet 27 and the tail-end suction cup electromagnet 22 are opposite.
[0029] A disc-shaped permanent magnet 24 is disposed between the head-end suction-cup electromagnet 27 and the tail-end suction-cup electromagnet 22. A rubber sleeve is coated on the surface of the disc-shaped permanent magnet 24, ensuring close contact between the disc-shaped permanent magnet 24 and the inner wall of the housing 26. A first water inlet check valve 20, a second water inlet check valve 21, and a first drain check valve 23 and a second drain check valve 25 are disposed on the housing 26. The first and second water inlet check valves 20 and 21 are located on either side of the disc-shaped permanent magnet 24, respectively. The first and second drain check valves 23 and 25 are located on either side of the disc-shaped permanent magnet 24, respectively.
[0030] Under the action of the positive and negative current switching device, the direction of the current input to the head-end suction cup electromagnet 27 and the tail-end suction cup electromagnet 22 can be intermittently switched, resulting in intermittent switching of the magnetic field directions of the head-end suction cup electromagnet 27 and the tail-end suction cup electromagnet 22. The magnetic field direction of the disc-shaped permanent magnet 24 is fixed. During installation, the upper and lower sides of the disc-shaped permanent magnet 24 are respectively N poles and S poles, while the upper and lower sides of the head-end suction cup electromagnet 27 are respectively S poles and N poles. Because the wiring directions of the head-end suction cup electromagnet 27 and the tail-end suction cup electromagnet 22 are opposite, the upper and lower sides of the tail-end suction cup electromagnet 22 are respectively N poles and S poles. The head-end suction cup electromagnet 27 and the disc-shaped permanent magnet 24 repel each other, while the disc-shaped permanent magnet 24 and the tail-end suction cup electromagnet 22 attract each other. The disc-shaped permanent magnet 24 moves downward and acts as a plunger, causing water to enter the first water inlet check valve 20 and water to enter the first water outlet check valve 23. Under the action of the positive and negative current switching device, the current's positive and negative polarity switches, and the corresponding magnetic field directions of the head-end suction cup electromagnet 27 and the tail-end suction cup electromagnet 22 are also switched. The upper and lower sides of the head-end suction cup electromagnet 27 are respectively N poles and S poles, while the upper and lower sides of the tail-end suction cup electromagnet 22 are respectively S poles and N poles. The upper and lower sides of the disc-shaped permanent magnet 24 are respectively N poles and S poles. The disc-shaped permanent magnet 24 and the tail-end suction cup electromagnet 22 repel each other, while the head-end suction cup electromagnet 27 and the disc-shaped permanent magnet 24 attract each other. The disc-shaped permanent magnet 24 moves upward, acting as a plunger, allowing water to enter the second water inlet check valve 21 and the second water outlet check valve 25 to drain water.
[0031] The positive and negative current switching device adopts a mechanical structure, which can meet the needs of positive and negative current switching, and has low manufacturing cost, low failure rate and low maintenance cost.
[0032] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.
Claims
1. A photovoltaic water pumping device, comprising a photovoltaic power generation panel, the photovoltaic power generation panel being connected to a DC combiner box via a power line, two positive power output lines and two negative power output lines being connected to the DC combiner box, each positive power output line and each negative power output line being connected to a positive-negative current switching device, which is connected to a water pump body via a first power input line and a second power input line, characterized in that: The positive and negative current switching device includes a conversion box and a power box. Two groups of switching mechanisms are arranged in an upper and lower manner in the conversion box. Each group of switching mechanisms includes a power input cylinder and a power output cylinder. A conductive ring is installed on the inner wall of the power output cylinder. The two conductive rings of the two groups of switching mechanisms are respectively connected to the water pump body through the first power input line and the second power input line; an arc-shaped positive conductive sheet and an arc-shaped negative conductive sheet are installed on the inner wall of the power input cylinder. The arc-shaped positive conductive sheet and the arc-shaped negative conductive sheet are disconnected. The arc-shaped positive conductive sheet is connected to the positive power output line, and the arc-shaped negative conductive sheet is connected to the negative power output line; a first rotating arm and a second rotating arm corresponding to the upper and lower groups of switching mechanisms are fixed on the rotating shaft The first rotating arm and the second rotating arm are both made of insulating material. The first rotating arm and the second rotating arm are at different heights and are arranged back to back. The first conductive rod is fixed on the first rotating arm. During the rotation of the first conductive rod, the upper end of the first conductive rod is in intermittent contact with its corresponding arc-shaped positive conductive sheet and arc-shaped negative conductive sheet, and the lower end of the first conductive rod is in contact with its corresponding conductive ring; the second conductive rod is fixed on the second rotating arm. During the rotation of the second conductive rod, the upper end of the second conductive rod is in intermittent contact with its corresponding arc-shaped positive conductive sheet and arc-shaped negative conductive sheet, and the lower end of the second conductive rod is in contact with its corresponding conductive ring; a disc-shaped permanent magnet is provided between the head-end suction cup electromagnet and the tail-end suction cup electromagnet, and a rubber sleeve is covered on the surface of the disc-shaped permanent magnet.
2. A photovoltaic water pumping device according to claim 1, characterized in that: The rotating shaft passes through each power input cylinder and each power output cylinder, and is connected to the conversion box through a bearing; a reduction motor is installed in the power box, a driving gear is installed on the output shaft of the reduction motor, and a driven gear is installed on the rotating shaft, and the driving gear and the driven gear are engaged.
3. The photovoltaic water pumping device according to claim 1, characterized in that: The water pump body includes a shell, and a head-end suction cup electromagnet and a tail-end suction cup electromagnet are respectively installed at the head and tail ends of the shell. The first conductive wiring and the second conductive wiring are connected to the head-end suction cup electromagnet, and the third conductive wiring and the fourth conductive wiring are connected to the tail-end suction cup electromagnet; the first conductive wiring is connected to the first power input wire, the second conductive wiring is connected to the second power input wire, the third conductive wiring is connected to the second power input wire, and the fourth conductive wiring is connected to the first power input wire.
4. The photovoltaic water pumping device according to claim 1, characterized in that: A first water inlet one-way valve, a second water inlet one-way valve, a first drain one-way valve and a second drain one-way valve are provided on the shell. The first water inlet one-way valve and the second water inlet one-way valve are respectively located on both sides of the disc-shaped permanent magnet, and the first drain one-way valve and the second drain one-way valve are respectively located on both sides of the disc-shaped permanent magnet.