A variable frequency pump set structure suitable for wide head pumping stations along the river

Abstract

This utility model discloses a variable frequency pump set structure suitable for wide-head pumping stations along the river, including a base plate. A fixing plate is fixedly connected to the upper surface of the base plate. A protective shell is provided on the base plate and the fixing plate. A variable frequency component is provided inside the protective shell. A pumping component is provided on the surface of the fixing plate. A second servo motor is fixedly connected to the lower surface of the base plate. The output end of the second servo motor transmits power to the pumping component through the variable frequency component. When pumping is required, the second servo motor is started. The output end of the second servo motor drives the first rotating rod to rotate. The first rotating rod drives the power wheel to rotate. The power wheel drives the driven wheel to rotate through the transmission wheel. The driven wheel drives the second rotating rod to rotate. The second rotating rod drives the turbine blades to rotate at high speed in the negative pressure chamber, thereby creating a negative pressure in the negative pressure chamber. Water is drawn into the negative pressure chamber through the inlet and discharged through the outlet. When the head needs to be adjusted, the first servo motor is started.

Description

Technical Field

[0001] This utility model relates to the field of pump station technology, specifically a variable frequency pump set structure suitable for wide-head riverside pump stations. Background Technology

[0002] Traditional riverside pumping station pump sets mostly operate at a fixed speed, with a fixed head range, making it difficult to adapt to large changes in water level. When the actual head is lower than the pump set's design head, a "large horse pulling a small cart" phenomenon occurs, resulting in significant energy waste and low operating efficiency. Conversely, when the actual head is higher than the design head, the pump set may malfunction due to overload, and there is even a risk of equipment damage. Therefore, those skilled in the art have provided a variable frequency pump set structure suitable for wide-head riverside pumping stations to solve the problems mentioned in the background art. Utility Model Content

[0003] The purpose of this utility model is to provide a variable frequency pump set structure suitable for wide head pumping stations along the river, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A variable frequency pump set structure suitable for wide head riverside pumping stations includes a base plate, a fixed plate fixedly connected to the upper surface of the base plate, a protective shell provided on the base plate and the fixed plate, a variable frequency component provided inside the protective shell, a pumping component provided on the surface of the fixed plate, and a second servo motor fixedly connected to the lower surface of the base plate. The output end of the second servo motor transmits power to the pumping component through the variable frequency component.

[0006] Furthermore, the frequency conversion component includes a power wheel and a first rotating rod. The first rotating rod is rotatably connected to the base plate via a bearing. The power wheel is fixedly connected to the surface of the first rotating rod. The lower end of the first rotating rod is fixedly connected to the output end of the second servo motor.

[0007] Furthermore, the frequency converter assembly also includes a second rotating rod and a driven wheel. The second rotating rod is rotatably connected to the fixed plate via a bearing, and the driven wheel is fixedly connected to the surface of the second rotating rod.

[0008] Furthermore, the frequency conversion assembly also includes an adjustment rod, a rotating carrier, and a first servo motor. The first servo motor is fixedly connected to the surface of the protective housing. The output end of the first servo motor is fixedly connected to the adjustment rod. The other end of the adjustment rod is fixedly connected to the rotating carrier, and the other end of the rotating carrier is rotatably connected to the rotating carrier through another adjustment rod and a bearing.

[0009] Furthermore, the frequency conversion component also includes a rotating shaft and a transmission wheel. The rotating shaft is rotatably connected to the rotating carrier through a bearing, and the transmission wheel is fixedly connected to the surface of the rotating shaft. The rotating carrier extends out from both sides of the transmission wheel and abuts against the power wheel and the driven wheel.

[0010] Furthermore, the pumping assembly includes an inlet, a negative pressure chamber, and an outlet. The negative pressure chamber is fixedly connected to the side of the fixing plate away from the protective shell. The inlet is fixedly connected to the surface of the negative pressure chamber, and the outlet is fixedly connected to the side of the negative pressure chamber. Both the outlet and the inlet are interconnected with the internal space of the negative pressure chamber.

[0011] Furthermore, the pumping assembly also includes turbine blades, which are fixedly connected to the surface of the second rotating rod and are rotatably connected within the negative pressure chamber.

[0012] By adopting the above technical solution

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. Through a unique variable frequency component design, the transmission wheel can change its contact position with the power wheel and driven wheel as the rotating carrier is adjusted, thereby flexibly adjusting the transmission ratio. This feature enables the pump set to accurately match different operating speeds according to actual head requirements. Whether in a gentle water conveyance scenario with low head or a pressurized drainage scenario with high head, it can maintain a stable and efficient operating state, effectively solving the problem of a significant drop in efficiency of traditional pump sets when the head changes greatly.

[0015] 2. The ingenious design of the frequency converter component enables stepless adjustment of power transmission, avoiding energy loss caused by gear switching in traditional speed regulation methods. At the same time, the second servo motor accurately transmits power to the pumping component through the frequency converter component, reducing waste in the power transmission process. This allows the motor output power to better match the actual pumping needs, thereby significantly reducing energy consumption and bringing considerable energy-saving benefits in the long term.

[0016] 3. The fixed connection between the base plate and the fixed plate provides a solid installation foundation for the entire pump set. All components, such as the power wheel, rotating rod, and turbine blades, are connected by bearings, which not only ensures the flexibility of component operation but also enhances the stability of the overall structure. The protective shell not only effectively protects the internal frequency conversion components, preventing external dust and moisture from corroding the components and extending the service life of the equipment, but also makes the overall structure more compact and saves installation space, making it especially suitable for environments with limited space, such as riverside pumping stations. Attached Figure Description

[0017] Figure 1 A schematic diagram of the overall structure of a variable frequency pump set suitable for wide head pumping stations along the river;

[0018] Figure 2 This is a schematic diagram of the internal structure of a variable frequency pump set suitable for wide head pumping stations along the river.

[0019] Figure 3 This is a front view schematic diagram of a variable frequency pump set structure suitable for wide head pumping stations along the river.

[0020] Figure 4 A half-section schematic diagram of a variable frequency pump set structure suitable for wide head pumping stations along the river;

[0021] In the diagram: 1. Protective housing; 2. First servo motor; 3. Second servo motor; 4. Base plate; 5. Fixing plate; 6. Water inlet; 7. Negative pressure chamber; 8. Water outlet; 9. Adjusting rod; 10. Power wheel; 11. First rotating rod; 12. Rotating carrier; 13. Second rotating rod; 14. Driven wheel; 15. Turbine fan blade; 16. Rotating shaft; 17. Transmission wheel. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1-4 This utility model provides an embodiment of a variable frequency pump set structure suitable for wide-head riverside pumping stations, including a base plate 4. A fixing plate 5 is fixedly connected to the upper surface of the base plate 4. A protective shell 1 is provided on the base plate 4 and the fixing plate 5. A variable frequency component is provided inside the protective shell 1. A pumping component is provided on the surface of the fixing plate 5. A second servo motor 3 is fixedly connected to the lower surface of the base plate 4. The output end of the second servo motor 3 transmits power to the pumping component through the variable frequency component. The protective shell 1 is installed on the base plate 4 and the fixing plate 5. The protective shell 1 is made of stainless steel and is detachably connected to the base plate 4 and the fixing plate 5 by bolts, which facilitates the later inspection and maintenance of the internal components.

[0024] In this embodiment, the frequency converter assembly includes a drive wheel 10 and a first rotating rod 11. The first rotating rod 11 is rotatably connected to the base plate 4 via bearings. The drive wheel 10 is fixedly connected to the surface of the first rotating rod 11. The lower end of the first rotating rod 11 is fixedly connected to the output end of the second servo motor 3. The frequency converter assembly also includes a second rotating rod 13 and a driven wheel 14. The second rotating rod 13 is rotatably connected to the fixing plate 5 via bearings. The driven wheel 14 is fixedly connected to the surface of the second rotating rod 13. The frequency converter assembly also includes an adjusting rod 9, a rotating carrier 12, and a first servo motor 2. The first servo motor 2 is fixedly connected to the surface of the protective housing 1. 2. An adjusting rod 9 is fixedly connected to the output end. The other end of the adjusting rod 9 is fixedly connected to a rotating carrier 12. The other end of the rotating carrier 12 is rotatably connected to the rotating carrier 12 via another adjusting rod 9 and a bearing. The frequency conversion assembly also includes a rotating shaft 16 and a transmission wheel 17. The rotating shaft 16 is rotatably connected to the rotating carrier 12 via a bearing. The transmission wheel 17 is fixedly connected to the surface of the rotating shaft 16. The rotating carrier 12 extends from both sides of the transmission wheel 17 and abuts against the power wheel 10 and the driven wheel 14. A first rotating rod 11 is rotatably connected to the base plate 4 via a deep groove ball bearing. The deep groove ball bearing has good radial load capacity and rotational accuracy, which can ensure the first rotation. The first rotating rod 11 rotates stably. A power wheel 10 is fixedly connected to the surface of the first rotating rod 11 via a flat key. A second rotating rod 13 is also rotatably connected to the fixed plate 5 via a deep groove ball bearing. The second rotating rod 13 is parallel to the first rotating rod 11. A driven wheel 14 is fixedly connected to the surface of the second rotating rod 13 via a flat key. A first servo motor 2 is fixedly connected to the surface of the protective housing 1 via bolts. An adjusting rod 9 is fixedly connected to the output end of the first servo motor 2 via a coupling. The adjusting rod 9 is made of high-strength steel. The other end of the adjusting rod 9 is fixedly connected to the rotating carrier 12 by welding. The rotating carrier 12 has a frame structure and is made of aluminum alloy. Lightweight and high-strength, the other end of the rotating carrier 12 is rotatably connected to the inner wall of the protective housing 1 via another adjusting rod 9 and a bearing. The bearing is a thrust ball bearing, which can withstand axial force and ensure the stable rotation of the rotating carrier 12. Inside the rotating carrier 12, a rotating shaft 16 is rotatably connected via a deep groove ball bearing. A transmission wheel 17 is fixedly connected to the surface of the rotating shaft 16 via a flat key. The rotating shaft 16 is made of rubber. The rotating carrier 12 extends from both sides of the transmission wheel 17 and meshes with the power wheel 10 and the driven wheel 14. By changing the angle of the rotating carrier 12, the meshing position of the transmission wheel 17 with the power wheel 10 and the driven wheel 14 can be adjusted, thereby changing the transmission ratio.

[0025] In this embodiment, the pumping assembly includes an inlet 6, a negative pressure chamber 7, and an outlet 8. The negative pressure chamber 7 is fixedly connected to the side of the fixing plate 5 away from the protective shell 1. The inlet 6 is fixedly connected to the surface of the negative pressure chamber 7, and the outlet 8 is fixedly connected to the side of the negative pressure chamber 7. Both the outlet 8 and the inlet 6 are in communication with the internal space of the negative pressure chamber 7. The pumping assembly also includes a turbine blade 15. The turbine blade 15 is fixedly connected to the surface of the second rotating rod 13 and is rotatably connected inside the negative pressure chamber 7. The negative pressure chamber 7 is fixedly connected to the side of the fixing plate 5 away from the protective shell 1 by bolts. The negative pressure chamber 7 is made of cast iron and its interior is precision machined to ensure its airtightness. The inlet 6 is fixedly connected to the surface of the negative pressure chamber 7 by a flange. The diameter of the inlet 6 is... According to the pumping flow rate setting, a filter screen is installed at the inlet 6 to prevent impurities from entering the negative pressure chamber 7. The side of the negative pressure chamber 7 is fixedly connected to the outlet 8 by a flange. The diameter of the outlet 8 is adapted to the inlet 6, and both the outlet 8 and the inlet 6 are interconnected with the internal space of the negative pressure chamber 7 to form a complete water flow channel. The end of the second rotating rod 13 away from the driven wheel 14 extends into the inside of the negative pressure chamber 7. The surface of the second rotating rod 13 is fixedly connected to the turbine blade 15 by welding. The turbine blade 15 adopts a streamlined design, which can improve the pumping efficiency. The turbine blade 15 is rotatably connected inside the negative pressure chamber 7, and a small gap is left between it and the inner wall of the negative pressure chamber 7, which not only ensures the free rotation of the turbine blade 15, but also reduces water leakage.

[0026] When pumping is required, the second servo motor 3 is started. The output of the second servo motor 3 drives the first rotating rod 11 to rotate. The first rotating rod 11 drives the power wheel 10 to rotate. The power wheel 10 drives the driven wheel 14 to rotate through the transmission wheel 17. The driven wheel 14 drives the second rotating rod 13 to rotate. The second rotating rod 13 drives the turbine blades 15 to rotate at high speed in the negative pressure chamber 7, thereby creating a negative pressure in the negative pressure chamber 7. Water is drawn into the negative pressure chamber 7 through the inlet 6 and discharged through the outlet 8. When the head needs to be adjusted, the first servo motor 2 is started. The output of the first servo motor 2 drives the adjusting rod 9 to rotate. The adjusting rod 9 drives the rotating carrier 12 to rotate. The rotating carrier 12 drives the transmission wheel 17 to change its meshing position with the power wheel 10 and the driven wheel 14, thereby changing the transmission ratio and adjusting the speed of the second rotating rod 13, thus achieving the purpose of adjusting the head.

[0027] Through a unique variable frequency drive (VFD) component design, the transmission wheel 17 can change its contact position with the drive wheel 10 and driven wheel 14 as the rotating carrier 12 is adjusted, thereby flexibly adjusting the transmission ratio. This feature allows the pump set to precisely match different operating speeds according to actual head requirements, maintaining a stable and efficient operating state whether in low-head, gentle water conveyance scenarios or high-head, pressurized drainage conditions. This effectively solves the problem of significant efficiency drops in traditional pump sets when head changes are large. The ingenious design of the VFD component achieves stepless adjustment of power transmission, avoiding energy loss caused by gear switching in traditional speed regulation methods. At the same time, the second servo motor 3 precisely transmits power to the pumping component through the VFD component, reducing... The elimination of power transmission waste allows the motor output power to better match actual pumping needs, thus significantly reducing energy consumption and bringing considerable energy-saving benefits in the long run. The fixed connection between the base plate 4 and the fixed plate 5 provides a solid installation foundation for the entire pump set. All components, such as the power wheel 10, rotating rod, and turbine blades 15, are connected by bearings, which not only ensures the flexibility of component operation but also enhances the stability of the overall structure. The protective housing 1 not only effectively protects the internal frequency conversion components, preventing external dust and moisture from corroding the components and extending the service life of the equipment, but also makes the overall structure more compact and saves installation space, making it particularly suitable for environments with limited space, such as riverside pumping stations.

[0028] This specification describes embodiments, but not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A variable frequency pump set structure suitable for wide-head riverside pumping stations, comprising a base plate (4), characterized in that, A fixing plate (5) is fixedly connected to the upper surface of the base plate (4). A protective shell (1) is provided on the base plate (4) and the fixing plate (5). A frequency conversion component is provided inside the protective shell (1). A water pumping component is provided on the surface of the fixing plate (5). A second servo motor (3) is fixedly connected to the lower surface of the base plate (4). The output end of the second servo motor (3) transmits power to the water pumping component through the frequency conversion component.

2. The variable frequency pump set structure for a riverside pumping station with a wide head, as described in claim 1, is characterized in that... The frequency conversion component includes a power wheel (10) and a first rotating rod (11). The first rotating rod (11) is rotatably connected to the base plate (4) via a bearing. The power wheel (10) is fixedly connected to the surface of the first rotating rod (11). The lower end of the first rotating rod (11) is fixedly connected to the output end of the second servo motor (3).

3. The variable frequency pump set structure for a riverside pumping station with a wide head, as described in claim 2, is characterized in that... The frequency converter also includes a second rotating rod (13) and a driven wheel (14). The second rotating rod (13) is rotatably connected to the fixed plate (5) via a bearing, and the driven wheel (14) is fixedly connected to the surface of the second rotating rod (13).

4. The variable frequency pump set structure for a riverside pumping station with a wide head, as described in claim 3, is characterized in that... The frequency conversion assembly also includes an adjustment rod (9), a rotating carrier (12) and a first servo motor (2). The first servo motor (2) is fixedly connected to the surface of the protective housing (1). The output end of the first servo motor (2) is fixedly connected to the adjustment rod (9). The other end of the adjustment rod (9) is fixedly connected to the rotating carrier (12). The other end of the rotating carrier (12) is rotatably connected to the rotating carrier (12) through another adjustment rod (9) and a bearing.

5. The variable frequency pump set structure for a riverside pumping station with a wide head, as described in claim 4, is characterized in that... The frequency conversion assembly also includes a rotating shaft (16) and a transmission wheel (17). The rotating carrier (12) is rotatably connected to the rotating shaft (16) through a bearing. The transmission wheel (17) is fixedly connected to the surface of the rotating shaft (16). The rotating carrier (12) extends out from both sides of the transmission wheel (17) and abuts against the power wheel (10) and the driven wheel (14).

6. The variable frequency pump set structure for a riverside pumping station with a wide head, as described in claim 5, is characterized in that... The pumping assembly includes an inlet (6), a negative pressure chamber (7), and an outlet (8). The negative pressure chamber (7) is fixedly connected to the side of the fixed plate (5) away from the protective shell (1). The inlet (6) is fixedly connected to the surface of the negative pressure chamber (7). The outlet (8) is fixedly connected to the side of the negative pressure chamber (7). Both the outlet (8) and the inlet (6) are connected to the internal space of the negative pressure chamber (7).

7. The variable frequency pump set structure for a riverside pumping station with a wide head, as described in claim 6, is characterized in that... The pumping assembly also includes a turbine blade (15), which is fixedly connected to the surface of the second rotating rod (13) and is rotatably connected to the negative pressure chamber (7).

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