A high-efficiency anti-turbulence drainage pump station flow channel

Abstract

The present invention relates to a high-efficiency anti-turbulence drainage pump station flow channel, wherein a cylindrical curved partition wall is provided in the flow channel for primary diversion of the incoming water flow, and each stream of water after the primary diversion flows into a gradually expanding diversion channel respectively, a radial partition wall is provided in the gradually expanding diversion channel to perform a secondary diversion of each stream of water, and each stream of water after the secondary diversion flows to a water collection tank via a sloped gradually expanding flow channel, a rectangular hole flow stabilizing retaining wall is provided between the sloped gradually expanding flow channel and the water collection tank, a gravity self-draining channel and a pumping forced drainage channel are provided in the water collection tank, the gravity self-draining channel and the pumping forced drainage channel are respectively connected to a water outlet tank, a water outlet gate that can be controlled to open and close is provided between the gravity self-draining channel and the water outlet tank, an axial flow pump is provided in the pumping forced drainage channel, and a water outlet gate for drainage is provided in the water outlet tank. The advantages of the present invention are: significantly improving the operating efficiency and safety of the pump station, while reducing power consumption, saving energy, and improving economic efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of municipal drainage engineering, in particular to a high-efficiency anti-turbulence drainage pump station flow channel, which is particularly suitable for large and medium-sized municipal drainage pump station projects. Background Art

[0002] The layout of the flow channel of the pump station directly affects the inlet flow state. The safe and efficient operation of large and medium-sized drainage pumping stations has high requirements for the inlet flow state. Water distribution and water flow velocity uniformity are key factors affecting the operation of the pump station. Unreasonable flow channel layout will have a series of negative impacts on the normal operation of the pump station, and in serious cases may lead to safety accidents.

[0003] The flow channel layout of traditional large and medium-sized drainage pumping stations is relatively extensive and lacks systematicity. It does not take into account the flow state of the water from entering to discharging from the pumping station. There are many areas that can be improved and optimized in the pumping station flow channels.

[0004] The extensive flow path layout of traditional pumping stations negatively impacts operations, primarily due to uneven inlet flow rates, uneven distribution of water intake across pumps, the creation of large vortices and dead zones within the sump, and excessive deviations in the pre-rotation angles at the pump inlets. These factors can prevent pumps from operating within their efficient ranges, leading to poor operating conditions and, in severe cases, irreversible damage to the equipment, such as cavitation and motor overheating. This can lead to high equipment failure rates, low drainage efficiency, high pump head losses, and high power consumption. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-efficiency anti-turbulence drainage pump station flow channel based on the above-mentioned deficiencies of the existing technology. By optimizing the structure of the pump station flow channel, it is compatible with both gravity flow self-drainage and pressure flow forced drainage, thereby improving the functional richness of the drainage pump station and significantly improving the operating efficiency and safety of the pump station. At the same time, it reduces power consumption, saves energy, and improves economic efficiency.

[0006] The purpose of the present invention is achieved by the following technical solutions:

[0007] A high-efficiency anti-turbulence drainage pump station flow channel, characterized in that: according to the direction of water flow entering the pump station to discharging the pump station, the flow channel is sequentially provided with a columnar curved surface partition wall, a gradually expanding diversion channel, a radial partition wall, a sloped gradually expanding flow channel, a rectangular hole flow stabilization retaining wall, a water collection pool, and a water outlet pool;

[0008] Among them, the cylindrical curved partition wall is used to divert the incoming water flow once, and each stream of water after the first diversion flows into the gradually expanding diversion channel respectively. The radial partition wall is arranged in the gradually expanding diversion channel to divert each stream of water for a second time, and each stream of water after the second diversion flows to the water collection tank via the slope gradually expanding flow channel. The rectangular hole flow stabilizing retaining wall is arranged between the slope gradually expanding flow channel and the water collection tank. A gravity self-drainage channel and a pumping strong drainage channel are provided in the water collection tank. The gravity self-drainage channel and the pumping strong drainage channel are respectively connected to the outlet tank. A controllable opening and closing outlet gate is provided between the gravity self-drainage channel and the outlet tank. An axial flow pump is provided in the pumping strong drainage channel, and the outlet tank is provided with an outlet gate for drainage.

[0009] The water-facing surface of the radial partition wall is configured as a circular curved surface.

[0010] A plurality of screen machines for filtering are arranged between the gradually diverging diversion channel and the sloped gradually diverging flow channel. The plurality of screen machines are installed in parallel, and the number of the screen machines matches the diversion number of the gradually diverging diversion channel.

[0011] The end of the pumping and strong exhaust channel is provided with a chamfer of a certain angle.

[0012] The chamfer is a 45° chamfer.

[0013] The bottom surface of the sloped gradually diverging flow channel is a downward slope.

[0014] The bottom surface of the sloped gradually diverging flow channel is a slope surface that slopes downward at 15 degrees.

[0015] According to the direction of water flow from entering to discharging from the pump station, the flow channel sizes of the gradually expanding diversion channel and the sloped gradually expanding flow channel are gradually expanded.

[0016] A rectangular water inlet culvert and a gate trough are sequentially arranged before the columnar curved partition wall, wherein the water flows into the pump station from the rectangular water inlet culvert and first enters the gate trough.

[0017] The advantages of the present invention are:

[0018] (1) The water inlet velocity of the pump station is smoother and more uniform: by setting up cylindrical curved partition walls and gradually expanding diversion channels, the water inlet velocity can be reduced, and the water flow velocity at different depths in the flow channel is more uniform, creating better hydraulic conditions for the water to flow smoothly through the screen machine, avoiding damage to the screen machine and reduced filtration capacity due to uneven flow rate.

[0019] (2) The water volume in each pumping and strong drainage channel is more evenly distributed: by setting up radial partition walls and rectangular hole flow-stabilizing retaining walls, when multiple water pumps are turned on at the same time, the water flow can be more evenly distributed in each channel, making the water pump operating conditions better, avoiding damage to the equipment caused by overload or insufficient water suction of a single water pump, and enhancing the safety and stability of water pump operation.

[0020] (3) Fewer vortices in the water collection tank: The setting of the rectangular hole flow-stabilizing retaining wall effectively avoids the generation of large vortices in the water collection tank, reduces the Reynolds number of the water flow, and mainly adopts laminar flow, avoiding the formation of dead water areas in the water collection tank, and creating better hydraulic conditions for the efficient operation of the water pump.

[0021] (4) Reduction of the water flow pre-swirl angle at the water pump inlet: By setting a 45° chamfer, the dead water area near the water pump inlet can be eliminated, and the water flow pre-swirl angle at the water inlet can be effectively controlled within a reasonable range, avoiding cavitation caused by excessive deviation of the pre-swirl angle, which damages the water pump impeller and other components, ensuring the safe operation of the equipment and extending its service life, which has a positive effect on improving the operating efficiency of the water pump.

[0022] (5) Improvement of the overall operation efficiency of the pump station: Through the systematic improvement and combination of the flow channel layout from water inlet to water outlet, that is, the cylindrical curved partition wall, the gradually expanding diversion channel, the rectangular hole flow stabilizing retaining wall and other structures are set in series. Under the condition of the same water inlet volume of the pump station, this flow channel form has obvious advantages in optimizing the hydraulic conditions of the water pump inlet, and the water pump operation efficiency is greatly improved. When the discharge volume is the same, due to the improved water pump operation efficiency, the power energy consumption is reduced, and resources are saved.

[0023] (6) It has both gravity flow self-draining function: By setting up a gravity flow self-draining channel, the pump station can integrate the functions of pressure flow strong drainage and gravity flow self-draining water. Integrating the self-draining function into the pump station can avoid the need to build a separate gravity flow self-draining channel, save municipal drainage project costs, and reduce investment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the plane layout of the present invention;

[0025] Figure 2 for Figure 1 Schematic diagram of the middle AA section;

[0026] Figure 3 for Figure 1 Schematic diagram of the middle BB section;

[0027] Figure 4 for Figure 1 Schematic diagram of the middle CC section;

[0028] Figure 5 This is a schematic front elevation view of the rectangular hole flow-stabilizing retaining wall of the present invention. DETAILED DESCRIPTION

[0029] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0030] like Figure 1-5 As shown, the marks 1-22 in the figure respectively represent: rectangular water inlet culvert 1, gate trough 2, cylindrical curved partition wall 3, water inlet gate 4, gradually expanding diversion channel 5, radial partition wall 6, screen machine 7, slope gradually expanding flow channel 8, rectangular hole steady flow retaining wall 9, collection tank 10, gravity self-draining channel 11, pumping and forced drainage channel 12, axial flow pump 13, water outlet tank 14, water outlet gate 15, water outlet gate 16, water outlet gate 17, chamfer 18, gate opening and closing machine 19, sealable cover plate 20, water pump outlet platform 21, water pump outlet pipe 22.

[0031] Example: Figures 1 to 5 As shown, the flow channel of the high-efficiency anti-flocculation drainage pump station in this embodiment includes the following structures in the order of water flow from entering to exiting the pump station:

[0032] (1) Water flows through the rectangular inlet culvert 1 into the gate well 2, and then through the inlet gate 4 into two different flow channels. Before entering the two flow channels, a cylindrical curved partition wall 3 is set to make the water flow more evenly distributed, the flow rate more gentle, and reduce the formation of dead water areas.

[0033] (2) After the water flow is evenly divided into two streams, it flows into the gradually expanding diversion channel 5. A radial dividing wall 6 is set in the gradually expanding diversion channel 5. The water-facing surface of the radial dividing wall adopts a circular curved surface, so that the water flow is evenly and smoothly divided into four streams.

[0034] (3) After the water flow is divided into four streams, it is filtered through four parallel-installed screen machines 7. The screen machines 7 can intercept large particles of insoluble impurities and prevent such impurities from entering the axial flow pump 13 and damaging the equipment.

[0035] (4) After being filtered by the screen machine 7, the four water flows merge into one and flow through the sloped gradually diverging flow channel 8 to the water collection tank 10. The bottom surface of the sloped gradually diverging flow channel 8 is a downwardly sloping surface. In this embodiment, the bottom surface of the sloped gradually diverging flow channel 8 is preferably a plane with a downward slope of 15 degrees to ensure the water flow rate.

[0036] (5) After the water reaches the bottom of the sloped gradually expanding flow channel 8, it passes through the rectangular hole steady flow retaining wall 9 and enters the water collection tank 10. The rectangular hole steady flow retaining wall 9 is conducive to further evenly distributing the water volume, reducing large vortices and dead water areas in the water collection tank 10, and optimizing the water inlet conditions of the axial flow pump 13.

[0037] (6) There are 7 flow channels in the water collection tank, including 1 gravity self-draining channel 11 and 6 pumping forced drainage channels 12. When the water volume is small and the water level in the water collection tank does not reach the pump start water level, the outlet gates 15, 16 and 17 are opened, and the water flows into the gravity self-draining channel 11, passes through the outlet gate 15, enters the outlet tank 14, and then flows out of the pump station by gravity through the outlet gates 16 and 17; when the water volume is large and the water level in the water collection tank 10 exceeds the pump start water level of the axial flow pump 13, the outlet gate 15 is closed, the outlet gates 16 and 17 are opened, and the water flows through the 6 parallel pumping forced drainage channels 12, is pumped by the axial flow pump 13, discharged into the outlet tank 14, and then flows out of the pump station by pressure through the outlet gates 16 and 17.

[0038] Therefore, this embodiment is compatible with both gravity flow self-drainage and pressure flow forced drainage, and the two drainage forms can be switched between each other, thereby meeting different working conditions of the pump station and saving investment in municipal drainage projects.

[0039] In this embodiment, a 45° chamfer 18 is provided at the end of each pumping and forced exhaust channel 12 to reduce the absolute value of the pre-swirl angle of the water flow at the inlet of the axial flow pump 13 and further optimize the operating conditions of the axial flow pump 13 .

[0040] like Figure 4 As shown, outlet gate 15 is connected to a gate hoist 19, which controls its opening and closing. A sealable cover plate 20 is installed above outlet gate 15 to protect it and allow for subsequent maintenance and repairs. Similarly, outlet gates 16 and 17 are each connected to a gate hoist 19 to control their opening and closing, and are sealed with a sealable cover plate 20.

[0041] Combine Figure 1 and Figure 4 As shown, a water pump outlet platform 21 is provided at the position of the water pump outlet pipe 22 of the axial flow pump 13 , which can discharge the water pumped by the axial flow pump 13 into the outlet pool 14 while maintaining a certain pressure.

[0042] In the specific implementation of this embodiment:

[0043] With a maximum displacement of 21m 3 / s, a municipal rainwater pump station with 6 equal-power working pumps (axial flow pumps 13) and each pump having a water head of 7.7m is taken as an example. The main implementation method of the high-efficiency anti-turbulence drainage pump station flow channel in this embodiment is as follows:

[0044] Assuming the bottom elevation H5 of the water collection tank 10 is ±0.00m, H1=3.01m, H2=2.60m, H3=3.00m, H4=2.30m, H6=2.80m, H7=6.30m, H8=11.40m, the highest water level Ha=5.00m;

[0045] The plane dimensions of the pump well body are L×W=42000mm×27100mm;

[0046] The cross-sectional dimensions of the rectangular water inlet box culvert 1 are 4000mm×2000mm;

[0047] The plane size of the gate well 2 is L10×W7=4000mm×8000mm;

[0048] Two water inlet gates 4 are provided, and the cross-sectional dimensions of a single water inlet gate 4 are 2400 mm × 2200 mm;

[0049] After passing through the water inlet gate 4, the water flows into the gradually expanding diversion channel 5. The outermost sides of the gradually expanding diversion channel 5 expand outward by 25 degrees and are divided into four channels by the radial partition wall 6. Before reaching the screen machine 7, it becomes four parallel channels. The remaining dimensions are: W3 = 12700mm, W4 = 2600mm, W5 = 960mm, W6 = 2090mm, L6 = 5240mm, L7 = 5200mm, L8 = 2150mm, L9 = 4130mm, and the height of the gradually expanding diversion channel 5 is 2000mm.

[0050] Behind the screen machine 7 is a sloped gradually expanding flow channel 8, the bottom of which is a plane inclined downward at 15 degrees, L5=8720mm;

[0051] The width of the rectangular hole steady flow retaining wall 9 is W = 27100mm, and the total height of the retaining wall is Ha=4000mm, the size of each rectangular hole opened on the rectangular hole steady flow retaining wall 9 is W9× Ha = 3200mm × 2000mm, each rectangular hole is spaced 600mm to 800mm apart, and the distance between the rectangular hole steady flow retaining wall 9 and the pumping and strong exhaust channel L4 is 10690mm;

[0052] The width of the gravity self-drainage channel 11 is W1=4000mm, and the length is L2+L3=2400mm+9600mm=1200mm. The width of the single pumping forced drainage channel 12 is W2=3400mm, and the length is L3=9600mm.

[0053] The inner diameter D1 of the axial flow pump 13 is 1700 mm, and the diameter D2 of the water outlet pipe 22 of the axial flow pump 13 is 1400 mm;

[0054] The plane size of the outlet pool 14 is L1×W=6000mm×27100mm, and W8 in the outlet pool 14 is 10000mm;

[0055] The cross-sectional dimensions of the outlet gate 15, outlet gate 16 and outlet gate 17 are all 4000mm×3000mm;

[0056] Through the above scheme, a drainage capacity of 21m can be built 3 / s, head 7.7m, an efficient and energy-saving drainage pump station with both gravity flow self-drainage and pressure flow pumping and forced drainage functions. The flow channels of large and medium-sized drainage pump stations of similar scale can be designed with reference to the above scheme, and the detailed dimensions can be fine-tuned according to actual needs.

[0057] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described in detail here.

Claims

1. A high-efficiency anti-turbulence drainage pump station flow channel, characterized by: According to the direction of water flow from entering to discharging from the pump station, the flow channel is sequentially provided with columnar curved dividing walls, gradually expanding diversion channels, radial dividing walls, sloped gradually expanding flow channels, rectangular hole steady flow retaining walls, water collection pools, and water outlet pools; Wherein, the columnar curved partition wall is used to divert the incoming water flow once, and each stream of water after the first diversion flows into the gradually expanding diversion channel respectively; the radial partition wall is arranged in the gradually expanding diversion channel to divert each stream of water for a second time, and each stream of water after the second diversion flows to the water collection tank via the slope gradually expanding flow channel; the rectangular hole flow stabilizing retaining wall is arranged between the slope gradually expanding flow channel and the water collection tank; a gravity self-draining channel and a pumping strong drainage channel are provided in the water collection tank; the gravity self-draining channel and the pumping strong drainage channel are respectively connected to the water outlet tank; a water outlet gate that can be controlled to open and close is provided between the gravity self-draining channel and the water outlet tank; an axial flow pump is provided in the pumping strong drainage channel; and the water outlet tank is provided with a water outlet gate for drainage; The water-facing surface of the radial partition wall is configured as a circular curved surface; The bottom surface of the sloped gradually diverging flow channel is a slope surface that slopes downward at 15 degrees.

2. The high-efficiency anti-turbulence drainage pump station flow channel according to claim 1, characterized in that: A plurality of screen machines for filtering are arranged between the gradually diverging diversion channel and the sloped gradually diverging flow channel. The plurality of screen machines are installed in parallel, and the number of the screen machines matches the diversion number of the gradually diverging diversion channel.

3. The high-efficiency anti-turbulence drainage pump station flow channel according to claim 1, characterized in that: The end of the pumping and strong exhaust channel is provided with a chamfer of a certain angle.

4. The high-efficiency anti-turbulence drainage pump station flow channel according to claim 3, characterized in that: The chamfer is a 45° chamfer.

5. The high-efficiency anti-turbulence drainage pump station flow channel according to claim 1, characterized in that: According to the direction of water flow from entering to discharging from the pump station, the flow channel sizes of the gradually expanding diversion channel and the sloped gradually expanding flow channel are gradually expanded.

6. The high-efficiency anti-turbulence drainage pump station flow channel according to claim 1, characterized in that: A rectangular water inlet culvert and a gate trough are sequentially arranged before the columnar curved partition wall, wherein the water flows into the pump station from the rectangular water inlet culvert and first enters the gate trough.

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