A jet-cavitation synergistic pre-pumping pool anti-sediment accumulation device

Abstract

The utility model provides a kind of jet flow-cavitation synergistic effect's pump station forebay anti-silt device, it is related to water treatment technical field.It includes submersible sewage pump, pressure gauge, pressure transmitter, first stage filter, second stage filter, Y type quick closing check valve, first electric gate valve, electromagnetic flowmeter and a plurality of anti-silt components connected by pipeline in turn, submersible sewage pump, pressure transmitter, first electric gate valve and electromagnetic flowmeter are connected with intelligent control system respectively, and anti-silt component includes venturi and contraction nozzle;With the advantages of simple structure, high efficiency and reliability, high degree of automation, it can be applied to the forebay of Yellow River diversion project pump station, effectively inhibit sand accumulation, improve the efficiency of pump station unit device, reduce the purpose of operation and management cost.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology, and more specifically, to a device for preventing siltation in the forebay of a pump station using a jet-cavitation synergistic effect. Background Technology

[0002] The Yellow River is one of the world's rivers with the highest sediment content. Pumping stations built in the Yellow River basin face challenges due to the high sediment content in the river. Sedimentation in the forebay worsens the flow patterns and pump intake conditions, leading to a 10%-20% decrease in pump efficiency, increased energy consumption, and significant operational and management difficulties, further increasing operating and management costs. Furthermore, forebay dredging is often ineffective, with new sediment quickly forming after dredging.

[0003] Therefore, there is an urgent need to develop a simple, reliable, efficient, and stable anti-siltation device for the forebay of pumping stations, which has important engineering value and significance for improving the efficiency of pumping station units and reducing operating and management costs. Utility Model Content

[0004] The purpose of this invention is to provide a pump station forebay siltation prevention device with jet-cavitation synergy, which can effectively prevent siltation in the forebay when applied to pump stations that transport sandy water.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This application provides a jet-cavitation synergistic pump station forebay anti-sludge deposition device, which includes a submersible sewage pump, pressure gauge, pressure transmitter, first-stage filter, second-stage filter, Y-type quick-closing check valve, first electric gate valve, electromagnetic flowmeter and several anti-deposition components connected in sequence through pipelines. The submersible sewage pump, pressure transmitter, first electric gate valve and electromagnetic flowmeter are respectively connected to an intelligent control system. The anti-deposition components include a venturi tube and a contraction nozzle.

[0006] Furthermore, in this utility model, an organic glass pipe is connected after the electromagnetic flowmeter, and a third-stage filter is connected in parallel after the second-stage filter and before the electromagnetic flowmeter. A second electric gate valve and a third electric gate valve are respectively installed before and after the third-stage filter, and the second electric gate valve and the third electric gate valve are respectively connected to the intelligent control system.

[0007] Furthermore, in this invention, the two ends of the aforementioned plexiglass pipe are connected to the pipeline via flanges.

[0008] Furthermore, in this invention, both the Venturi tube and the contraction nozzle are threadedly connected to the pipeline and are arranged at right angles to each other on the same horizontal plane.

[0009] Furthermore, in this utility model, the aforementioned anti-sludge components are arranged linearly and at equal intervals in the rectangular forebay along the water inlet direction and perpendicular to the water inlet direction; the anti-sludge components are arranged in concentric circles of different diameters in the circular forebay.

[0010] Compared with the prior art, the present invention has at least the following advantages or beneficial effects: This utility model has the advantages of simple structure, high efficiency and reliability, and high degree of automation. It can be applied to the forebay of the Yellow River diversion project pumping station to effectively suppress siltation, improve the efficiency of the pumping station unit, and reduce operation and management costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a connection diagram of the present invention; Figure 2 This is a three-dimensional isometric view of the present invention; Figure 3 This is a cross-sectional view of the present invention.

[0013] Icons: 1. Intelligent control system; 2. Submersible sewage pump; 3. Pressure gauge; 4. Pressure transmitter; 5. First-stage filter; 6. Second-stage filter; 7. Third-stage filter; 8. Y-type quick-closing check valve; 9. First electric gate valve; 10. Second electric gate valve; 11. Third electric gate valve; 12. Electromagnetic flow meter; 13. Acrylic glass pipe; 14. Steel pipe; 15. Venturi tube; 16. Contraction nozzle; 17. Pipe clamp. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] Example 1 This embodiment provides a jet-cavitation synergistic effect pump station forebay siltation prevention device, such as... Figures 1-3 As shown, it includes a submersible sewage pump 2, a pressure gauge 3, a pressure transmitter 4, a first-stage filter 5, a second-stage filter 6, a Y-type quick-closing check valve 8, a first electric gate valve 9, an electromagnetic flowmeter 12, and several anti-sludge components connected sequentially via pipelines. The submersible sewage pump 2, pressure transmitter 4, first electric gate valve 9, and electromagnetic flowmeter 12 are respectively connected to the intelligent control system 1. The anti-sludge components include a venturi tube 15 and a converging nozzle 16. The first-stage filter 5 can be a sand filter, and the second-stage filter 6 can be a disc filter. Specifically, the sand filter effectively filters larger silt particles and other impurities in the water, while the disc filter effectively filters smaller silt particles and fibrous impurities in the water.

[0019] In this embodiment, the submersible pump is equipped with a variable frequency motor to meet the working pressure and flow rate changes of the anti-siltation device; the variable frequency motor is adjusted by the intelligent control system 1, thereby changing the pressure and flow rate of the entire system; the gate valve can be switched by the intelligent control system 1, thereby changing the working mode of the entire system; the intelligent control system 1 can remotely control and adjust the anti-siltation device, and has many advantages such as high degree of automation, energy saving, high reliability, strong safety, and easy management.

[0020] Specifically, the Venturi tube 15 is connected to the internal thread of the left outlet pipe of the pipeline through the external thread of its inlet straight pipe section, which facilitates disassembly and maintenance. Its inlet section diameter is D1=30mm, inlet section length is L1=100mm, constriction section cone angle is 21°, throat diameter is D2=1 / 4D1=7.5mm, throat length is L2=D2=7.5mm, diffuser section cone angle is 15°, length is L3=60mm. On the same horizontal plane, the Venturi tube 15 and the constriction nozzle 16 form a 90° right angle; to ensure that when the liquid flows through the jet hole at a certain speed, a low-pressure zone is formed at the jet hole outlet, so that cavitation energy can be generated under medium pressure, and the cavitation intensity is maximized and the cavitation effect is optimal. In addition, the contraction nozzle 16 is connected to the internal thread of the right outlet pipe of the pipeline through the external thread of its inlet straight pipe end, which facilitates disassembly and maintenance. Its inlet section diameter is D3=30mm, inlet section length is L4=200mm, contraction section length is L5=30mm, and contraction section outlet diameter is D4=10mm. On the same horizontal plane, the contraction nozzle 16 and the venturi tube 15 form a 90° right angle.

[0021] In one embodiment of this example, as Figure 2 As shown, the anti-sludge components are arranged linearly and at equal intervals along the water inlet direction and perpendicular to the water inlet direction of the rectangular forebay. The specific number of anti-sludge components and the spacing between them are determined according to the size of the rectangular forebay. In the circular forebay, the anti-sludge components are arranged in concentric circles of different diameters. The specific number of anti-sludge components and the spacing between them are determined according to the size of the rectangular forebay. The anti-sludge components are arranged in different types according to the shape of the forebay to make the cavitation-jet coupling effect more complete and the range of action larger, thereby achieving the effect of preventing siltation in the entire forebay. The distance between the anti-sludge component closest to the suction pipe and the suction pipe shall not be less than 1.5m to ensure that the flow state in front of the suction pipe is stable and smooth, so that the centrifugal pump has good suction conditions.

[0022] Submersible sewage pump 2 is placed in the forebay, such as Figure 3As shown, for a rectangular forebay, the submersible sewage pump 2 is positioned at the upper left or lower right corner from the inlet direction, with a distance of no less than 80cm from both walls. This ensures good flow at the pump's inlet and avoids affecting the jet-cavitation coupling effect of the device. The submersible sewage pump 2 needs to be equipped with a variable frequency motor to meet the pressure and flow rate changes of the anti-siltation device. The outlet of the submersible sewage pump 2 is connected to a section of vertical steel pipe 14, which is fixed to the pool wall by pipe clamps 17. After exiting the forebay, the vertical steel pipe 14 is connected to the horizontal steel pipe 14 via a 90° steel elbow. The head of the submersible sewage pump 2 determines the pressure at the outlet of the venturi tube 15 and the converging nozzle 16. When the sand content is high, the pump outlet pressure is increased by adjusting the variable frequency motor, thereby strengthening the jet-cavitation coupling effect and better suppressing siltation.

[0023] It should be noted that the distance H from the center line of the pipe in the forebay to the bottom of the forebay is 150mm, so that the cavitation-jet coupling effect can directly act on the area with high sand content in the incoming flow, which can effectively inhibit the direct accumulation of silt in the incoming flow of the forebay to the bottom of the pool.

[0024] During operation, cavitation occurs in the Venturi tube 15, forming cavitation bubbles. A jet is formed at the nozzle outlet. The collapse of cavitation bubbles and the jet work together to form a coupled flow field. Within the effective range of this flow field, the collapse of cavitation bubbles generates a high pressure of 107 Pa, accompanied by a strong shock wave. A high-speed jet is also formed at the nozzle outlet. Therefore, the intensity and range of the coupled flow field are significantly improved compared to cavitation or jet alone. Under the interaction of high pressure, shock wave, and high-speed jet, sediment cannot accumulate in the forebay. The submersible sewage pump 2 uses a variable frequency motor, so the pressure and flow rate of the device can be changed by adjusting the motor speed, thereby controlling the intensity and range of the jet-cavitation coupled flow field to adapt to changes in the sediment content of the water and achieve the optimal effect of suppressing sediment accumulation. The filtration system uses a two-stage series connection of a sand filter and a disc filter, which can remove a large amount of sediment and other impurities from the water, preventing sediment and other impurities from clogging the Venturi tube 15 and the converging nozzle 16, and reducing wear on pipelines and equipment.

[0025] Example 2 This embodiment provides a jet-cavitation synergistic effect pump station forebay siltation prevention device, such as... Figure 1 As shown, it is basically the same as Embodiment 1, with the main difference being that: an organic glass pipe 13 is connected after the electromagnetic flowmeter 12, and a third-stage filter 7 is connected in parallel after the second-stage filter 6 and before the electromagnetic flowmeter 12. A second electric gate valve 10 and a third electric gate valve 11 are respectively installed before and after the third-stage filter 7, and the second electric gate valve 10 and the third electric gate valve 11 are respectively connected to the intelligent control system 1. The third-stage filter 7 can be a disc filter; the parallel connection can be achieved using a T-connector.

[0026] In this embodiment, both ends of the plexiglass pipe 13 are connected to the pipeline via flanges. By observing the water quality in the plexiglass pipe 13, if there are still obvious impurities in the water, it indicates that the sand content in the water exceeds the filtration capacity of the first two filters. By switching the first electric gate valve 9, the third filter 7 is changed from parallel to series with the first two filters, thereby achieving a better filtration effect. When the filtration method is the first filter 5 and the second filter 6 in series, the first electric gate valve 9 is in the open state, and the second and third electric gate valves 11 are in the closed state. When the filtration method is the first filter 5, the second filter 6, and the third filter 7 in series, the first electric gate valve 9 is in the closed state, and the second and third electric gate valves 11 are in the open state.

[0027] It should be noted that for the electromagnetic flowmeter 12, the required straight pipe lengths before and after it are 5D and 3D (D is the pipe diameter), respectively, to ensure stable flow within the pipe and high flow measurement accuracy. Furthermore, the electromagnetic flowmeter 12 is located after the third-stage filter 7 so that it can measure water filtered by the first-stage filter 5 and the second-stage filter 6, as well as water filtered by the first-stage filter 5, the second-stage filter 6, and the third-stage filter 7.

[0028] When in use, by observing the water quality in the plexiglass pipe 13 of this device, if there are still obvious impurities in the water, it indicates that the sand content in the water exceeds the filtration capacity of the first two filters. By switching the gate valve, the third filter 7 is connected in series with the first two filters to achieve a better filtration effect and further enhance the effect of inhibiting siltation.

[0029] In summary, the embodiments of this utility model provide a pump station forebay siltation prevention device with jet-cavitation synergy, which has at least the following advantages or beneficial effects: This utility model has the advantages of simple structure, high efficiency and reliability, and high degree of automation. It can be applied to the forebay of the Yellow River diversion project pumping station to effectively suppress siltation, improve the efficiency of the pumping station unit, and reduce operation and management costs.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A jet-cavitation synergistic device for preventing siltation in the forebay of a pump station, characterized in that, The system includes a submersible sewage pump, a pressure gauge, a pressure transmitter, a first-stage filter, a second-stage filter, a Y-type quick-closing check valve, a first electric gate valve, an electromagnetic flow meter, and several anti-sludge components connected in sequence via pipelines. The submersible sewage pump, pressure transmitter, first electric gate valve, and electromagnetic flow meter are respectively connected to an intelligent control system. The anti-sludge components include a venturi tube and a converging nozzle.

2. The jet-cavitation synergistic anti-siltation device for pump station forebays according to claim 1, characterized in that, An acrylic pipe is connected after the electromagnetic flowmeter. A third-stage filter is connected in parallel after the second-stage filter and before the electromagnetic flowmeter. A second electric gate valve and a third electric gate valve are respectively installed before and after the third-stage filter. The second electric gate valve and the third electric gate valve are respectively connected to the intelligent control system.

3. The jet-cavitation synergistic anti-siltation device for pump station forebay according to claim 2, characterized in that, The two ends of the plexiglass pipe are connected to the pipeline via flanges.

4. The device according to claim 1, wherein, Both the venturi tube and the contraction nozzle are threaded to the pipeline and are set at right angles to each other on the same horizontal plane.

5. The jet-cavitation synergistic anti-siltation device for pump station forebay according to claim 1, characterized in that, The anti-sludge components are arranged linearly and at equal intervals in the rectangular forebay along the water inlet direction and perpendicular to the water inlet direction; the anti-sludge components are arranged in concentric circles of different diameters in the circular forebay.

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