CN115434951B - Rectifying structure for improving water inflow state of porous inflow pump station - Google Patents
Rectifying structure for improving water inflow state of porous inflow pump station Download PDFInfo
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- CN115434951B CN115434951B CN202211157426.9A CN202211157426A CN115434951B CN 115434951 B CN115434951 B CN 115434951B CN 202211157426 A CN202211157426 A CN 202211157426A CN 115434951 B CN115434951 B CN 115434951B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/27—Filters with filtering elements which move during the filtering operation with rotary filtering surfaces, which are neither cylindrical nor planar, e.g. helical surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/14—Devices for separating liquid or solid substances from sewage, e.g. sand or sludge traps, rakes or grates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/22—Adaptations of pumping plants for lifting sewage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The invention relates to the field of pump station rectification, in particular to a rectification structure for improving the inflow flow state of a porous inflow pump station; the water wheel is characterized by comprising an outer shell, a control system and a water inlet pipe, wherein a plurality of water inlet pipes are fixedly arranged at the edge of the upper part of the outer shell, the interior of the water inlet pipe is communicated with the interior of the outer shell, the central axis of the water inlet pipe is tangent to the circular arc of the horizontal section of the outer shell, the middle part of the outer shell is funnel-shaped, the inner surface of the middle part of the outer shell is provided with spiral downward drainage patterns, a filter screen is rotationally connected to the outer shell, an air-entraining ridge is further arranged on the inner surface of the outer shell and is perpendicular to the drainage patterns, the air-entraining ridge and a filter hole are circular arc concave, a water wheel is rotationally connected with the outer shell, and air-entraining holes are formed in each blade of the water wheel; according to the invention, through the design of the direction of the water inlet pipe and the arrangement of the diversion veins, and the aeration ridge, the filtering holes and the aeration holes, the purpose of solving cavitation erosion in the porous inflow is achieved.
Description
Technical Field
The invention relates to the field of pump station rectification, in particular to a rectification structure for improving the inflow flow state of a porous inflow pump station.
Background
With the urban development of large cities, urban sewage drainage and flow collection pump stations are increasingly important, however, the existing sewage drainage pump stations still have weak sewage drainage capability, and urban waterlogging and other phenomena can occur due to unsmooth drainage in extreme stormy weather. The cavitation is easily generated on the inner wall of the pipe when the water flows at high speed, and the pipe wall is damaged once cavitation is generated.
Aiming at the problems, the limited company of the noble survey design institute of the electric building group of China designs a post-aeration cavitation erosion prevention structure of a sluice gate of a sluice tunnel, and the patent number is CN 111809580B.
Said invention has no pressure section at downstream, and has a ventilation channel communicated with external portion for aeration of high-speed jet flow; but it is mainly aimed at the problem of gate, and can't solve the cavitation problem of drainage channel inner wall.
The invention provides a gentle slope open channel pressurized inlet air-entraining method and an air-entraining device, which are designed for the university of Sichuan, and the patent number is CN 103758091B.
Although the invention can aerate the pressure inlet of the gentle slope open channel, in order to increase the flow rate, a vertical pipeline design is often adopted in the urban drainage pipeline, and the invention cannot aerate the vertical pipeline.
Aiming at the problems, the university of Sichuan discloses a cyclone shaft flood discharging hole with a vortex chamber air-entraining ridge, the patent number is CN110424343B, the invention provides a cyclone shaft flood discharging hole with a vortex chamber air-entraining ridge, a vertical air-entraining ridge is formed in the vortex chamber by shifting a side wall which is originally tangentially connected with the vortex chamber to the center side of the vortex chamber by a certain distance, an air-entraining cavity is formed when water flow passes through the air-entraining ridge, external air continuously supplies air to the side of the water flow close to a wall surface through the cavity, and the air-entraining concentration of the water flow close to the wall surface is increased, so that the cavitation resistance of the whole shaft structure is greatly improved;
said invention can greatly raise cavitation erosion resistance of whole vertical shaft structure, but has no obvious cavitation erosion resistance effect.
In view of the above, the present invention provides a rectifying structure for improving the inflow state of a porous inflow pump station, which solves the above technical problems.
Disclosure of Invention
The technical aim to be solved by the invention is as follows: a rectifying structure of the water inflow state of a porous inflow pump station can solve cavitation erosion.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a rectifying structure for improving water inflow state of a porous inflow pump station, which comprises an outer shell, a control system and a water inlet pipe;
the upper edge of the outer shell is fixedly provided with a plurality of water inlet pipes, the inside of the water inlet pipes is communicated with the inside of the outer shell, and water can flow into the outer shell from the water inlet pipes in a concentrated manner so as to be rectified; the central axis of the water inlet pipe is tangent to the circular arc of the horizontal section of the outer shell, so that the initial water flow direction is rotated downwards along with the gravity of the water inlet pipe;
the middle part of the outer shell is funnel-shaped, the inner surface of the middle part of the outer shell is provided with spiral downward diversion lines, the water flow is led to flow to the middle lower part in a spiral way through the funnel-shaped design, and the diversion lines can guide the water flow to flow downwards around the outer shell better in a rotating way; the top of the outer shell is of a detachable structure, the bottom of the outer shell is connected with the water pump, and water flows of the water inlet pipes flow to the water pump after parallel flow.
Through the design of the water inlet pipe direction and the arrangement of the drainage patterns, water flow clings to the inner wall of the outer shell under the action of centrifugal force, pressure is generated on the inner wall of the outer shell, cavitation erosion is avoided, and the friction force of the inner wall surface of the outer shell is increased; the center of the outer shell forms a stable cavity, which is favorable for keeping the flow state of water flow stable.
Preferably, the outer shell is rotationally connected with a filter screen, the filter screen is spiral, the thread pitch of the filter screen is equal to that of the drainage pattern, and the filter screen is attached to the drainage pattern; the filter screen not only can filter out the big piece of residue that makes the water pump produce harm easily to owing to it adopts spiral design, even take place that filtration pore part blocks up rivers still can continue spiral downwardly flowing.
After the filter holes are blocked, the top of the outer shell can be detached, then the filter screen is cleaned and reinstalled, and if the filter screen is found to be damaged, the filter screen is replaced and a new filter screen is installed.
Preferably, the inner surface of the outer shell is also provided with an air-entraining ridge, the air-entraining ridge is arranged vertically to the drainage patterns, a through hole communicated with the outside is arranged below the air-entraining ridge, and the inner part of the outer shell can absorb air to the outside; the water flow can rotate and downwards flow against the inner wall of the outer shell along with the action of centrifugal force and gravity, and air is doped when the water flow passes through the aerator.
If air exists in the cavity generated in the water flow process, the air entrainment can reduce the destructive power of the cavity when collapsing, namely the destructive power of cavitation erosion; in addition, the air is aerated into the water, so that the water hammer effect can be reduced, and the damage of the water hammer effect to the inner wall is further reduced; in addition, when enough air is doped in the water body, the negative pressure is effectively reduced, so that the occurrence probability of cavitation is reduced, and cavitation is even avoided. Experiments and practical applications at home and abroad show that the aeration corrosion reduction is a low-cost but very effective corrosion reduction measure.
Preferably, the rotation direction of the filter screen is opposite to the thread direction of the drainage thread, so that the water flow can impact the upper surface of the filter screen, and then massive residues which are easy to damage the water pump are filtered out.
Preferably, the aerator is designed to be concave in an arc shape, and the design can enable the aerator to finish the aeration task better.
The relatively thick outer shell has weaker drainage patterns and more drainage patterns bear the scouring of water flow, so that a gas-mixing ridge with the strongest cavitation erosion resistance and the best protection performance on the side edge is required to be selected. The experiment shows that: among the linear aerator, the convex aerator and the concave aerator, the concave aerator has the longest aeration protection length for the side edge of the flow channel, so the concave aerator is selected as the aerator of the invention.
Preferably, the filter screen is provided with a filter hole, the filter screen is of a hollow design, a vent hole communicated with the outside is formed beside the filter hole, outside air can enter the outer shell through the vent hole, and the cross section of the filter hole is of an inward concave arc shape.
When water passes through the filter holes, the filter holes can also perform the function of aeration, and the concave design can obviously improve the protection of the diversion lines.
Preferably, a water wheel is arranged in the lower part of the outer shell, a transmission assembly is arranged outside the outer shell, the water wheel is rotationally connected with the outer shell, the water wheel is used for receiving the kinetic energy of water flow, and the transmission assembly is used for transmitting the kinetic energy received by the water wheel to the filter screen; the transmission assembly includes: the device comprises a power bevel gear, a transmission bevel gear, a power belt pulley, a transmission belt pulley and a belt;
the power bevel gear is fixedly connected with the rotating shaft of the water wheel in a coaxial mode, the power bevel gear is meshed with the transmission bevel gear, the power pulley is fixedly arranged on the transmission bevel gear in a coaxial mode, the power pulley is attached to the belt, the transmission pulley is attached to the belt, and the transmission pulley is fixedly connected with the rotating shaft of the filter screen in a coaxial mode.
When specifically operating, when rivers pass the shell body, rivers can drive the water wheels and rotate, and the rotation of water wheels can drive power bevel gear through self pivot and rotate, power bevel gear's rotation can drive bevel gear and rotate, drive bevel gear's rotation can drive power band pulley through its self pivot and rotate, power band pulley can drive the drive band pulley through the belt and rotate, the drive band pulley drives the filter screen rotation, filter screen pivoted direction is opposite with drainage line spiral direction.
Preferably, each blade of the water wheel is provided with an air-mixing hole, the water wheel is of a hollow design, an air vent communicated with the outside is arranged beside the air-mixing hole, the outside can convey air to the inside of the outer shell through the air-mixing hole, and the cross section of the air-mixing hole is of an outer convex arc shape.
When water passes through the air-mixing holes, the air-mixing holes can also play the function of air mixing; because the water wheel is very close to the water pump at the bottom end, the cavity backwater depth must be reduced as much as possible so as to protect the water pump; the experiment shows that: in the linear aerator, the convex aerator and the concave aerator, the cavity backwater depth of the convex aerator is smaller than that of the other two aerators, and the convex aerator has the best performance of reducing the cavity backwater depth, so that the aerator adopts a coating arc design.
Preferably, a flow direction measuring instrument is installed in the middle of the inner surface of the outer shell, and the flow direction measuring instrument is electrically connected with the control system.
An operator can monitor the flow direction of the water flow in the device through the control system; when the control system finds that abnormal flow or disturbance occurs in the water flow direction through the flow direction measuring instrument, an alarm can be sent to a monitoring person, and the monitoring person can detach the outer shell to solve the problem in the device, such as cleaning the filter screen which is blocked and replacing the damaged filter screen. By arranging the flow direction measuring instrument, an external operator can find out the internal faults of the device without opening the device.
Preferably, a flow rate measuring instrument is installed in the middle of the inner surface of the outer shell, and the flow rate measuring instrument is electrically connected with the control system.
The flow meter is used for detecting the flow in the device and transmitting data to the control system, and the control system records the data and judges the internal fault condition of the device by combining the flow direction meter.
The beneficial effects of the invention are as follows:
1. according to the rectifying structure for improving the water inflow state of the porous inflow pump station, through the design of the water inlet pipe direction and the arrangement of the drainage patterns, water flow clings to the inner wall of the outer shell under the action of centrifugal force, pressure is generated on the inner wall of the outer shell, cavitation erosion is avoided, and the friction force of the inner wall surface of the outer shell is increased; the center of the outer shell forms a stable cavity, which is favorable for keeping the flow state of water flow stable.
2. The rectification structure for improving the water inflow state of the porous inflow pump station is provided with an aeration ridge, a filtering hole with an aeration function and an aeration hole, and the aeration ridge, the filtering hole and the aeration hole are used for completing aeration together; the destructive power of cavity collapse can be reduced by the aeration, namely the destructive power of cavitation erosion is reduced; in addition, the air is aerated into the water, so that the water hammer effect can be reduced, and the damage of the water hammer effect to the inner wall is further reduced; in addition, when enough air is doped in the water body, the negative pressure is effectively reduced, so that the occurrence probability of cavitation is reduced, and cavitation is even avoided. Experiments and practical applications at home and abroad show that the aeration corrosion reduction is a low-cost but very effective corrosion reduction measure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is a vertical semi-sectional view of the present invention;
FIG. 3 is a horizontal cross-sectional view of the present invention;
FIG. 4 is a schematic diagram of the structure of the filter screen of the present invention;
FIG. 5 is a schematic view of the outer housing of the present invention in semi-section;
FIG. 6 is a schematic view of a aerator according to the present invention;
FIG. 7 is a diagram of the filtration Kong Poumian of the present invention;
FIG. 8 is a schematic view of the water wheel structure of the present invention;
FIG. 9 is a block diagram of the transmission assembly of the present invention;
FIG. 10 is a schematic illustration of an aeration Kong Poumian of the present invention;
FIG. 11 is a graph showing the relationship between sidewall aeration concentration and flow under different shaped aeration ridges according to the present invention;
FIG. 12 is a graph comparing the relationship between single wide flow and backwater depth under different shapes of the aerator according to the present invention.
In the figure: the device comprises an outer shell 1, drainage patterns 11, a aerator 12, a water inlet pipe 2, a filter screen 3, a filter hole 31, a water wheel 4, an aerator hole 41, a transmission assembly 5, a power bevel gear 51, a power bevel gear 52, a power belt pulley 53, a power belt pulley 54, a belt 55, a flow direction measuring instrument 6 and a flow velocity measuring instrument 7.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
As shown in fig. 1, 3 and 5, a rectifying structure for improving the inflow state of a porous inflow pump station comprises an outer shell 1, a control system and a water inlet pipe 2;
a plurality of water inlet pipes 2 are fixedly arranged at the edge of the upper part of the outer shell 1, the inside of the water inlet pipes 2 is communicated with the inside of the outer shell 1, and water can flow into the outer shell 1 from the water inlet pipes 2 in a concentrated manner so as to be rectified; the central axis of the water inlet pipe 2 is tangent to the circular arc of the horizontal section of the outer shell 1, so that the initial water flow direction is downwards along with the rotation of the gravity of the water inlet pipe;
the middle part of the outer shell 1 is funnel-shaped, the inner surface of the middle part of the outer shell 1 is provided with spiral downward diversion lines 11, the funnel-shaped design is used for enabling water flow to the middle lower part in a spiral manner, and the diversion lines 11 can guide the water flow to flow downwards around the outer shell 1 in a rotating manner; the top of the outer shell 1 is of a detachable structure, the bottom of the outer shell 1 is connected with a water pump, and water flows of the water inlet pipes 2 flow to the water pump after parallel flow.
Through the design of the direction of the water inlet pipe 2 and the arrangement of the drainage patterns 11, water flow clings to the inner wall of the outer shell 1 under the action of centrifugal force, pressure is generated on the inner wall of the outer shell 1, cavitation erosion is avoided, and friction force of the inner wall surface of the outer shell 1 is increased; the center of the outer shell 1 forms a relatively stable cavity, which is beneficial to keeping the flow state of water flow stable.
As shown in fig. 2 and fig. 4, the outer casing 1 is rotatably connected with a filter screen 3, the filter screen 3 is spiral, the screw thread of the filter screen 3 is equal to the screw thread of the drainage pattern 11 in the same direction, and the filter screen 3 is attached to the drainage pattern 11; the filter screen 3 not only can filter out large residues which are easy to damage the water pump, but also can continue to spiral downwards even if the water flow is blocked by the filter holes 31 due to the spiral design.
When the filter hole 31 is blocked, the top of the outer shell 1 can be detached, then the filter screen 3 is cleaned and reinstalled, and if the damage of the filter screen 3 is found, the filter screen 3 is replaced, and a new filter screen 3 is installed.
As shown in fig. 5, the inner surface of the outer casing 1 is further provided with an air-entraining ridge 12, the air-entraining ridge 12 is vertically arranged with the drainage patterns 11, a through hole communicated with the outside is formed below the air-entraining ridge 12, and the inside of the outer casing 1 can absorb air to the outside; the water flow rotates and flows downwards against the inner wall of the outer shell 1 under the action of centrifugal force and gravity, and air is doped when the water flow passes through the aerator 12.
If air exists in the cavity generated in the water flow process, the air entrainment can reduce the destructive power of the cavity when collapsing, namely the destructive power of cavitation erosion; in addition, the air is aerated into the water, so that the water hammer effect can be reduced, and the damage of the water hammer effect to the inner wall is further reduced; in addition, when enough air is doped in the water body, the negative pressure is effectively reduced, so that the occurrence probability of cavitation is reduced, and cavitation is even avoided. Experiments and practical applications at home and abroad show that the aeration corrosion reduction is a low-cost but very effective corrosion reduction measure.
As shown in fig. 3, 4 and 5, the rotation direction of the filter screen 3 is opposite to the screw direction of the drainage pattern 11, so that the water flow impacts the upper surface of the filter screen 3, and thus large residues which are easy to damage the water pump are filtered, and the water flow does not change along the spiral direction of the filter screen 3 and the drainage pattern 11 due to the same spiral direction of the filter screen 3 and the drainage pattern 11, but flows along the spiral direction of the filter screen 3 and the drainage pattern 11.
As shown in fig. 5, 6 and 11, the aerator 12 is designed to be concave in a circular arc, and this design can make the aerator 12 perform the aeration task better.
The relatively thick outer shell 1 has weaker drainage patterns 11, and the drainage patterns 11 are more subjected to water flow scouring, so that an aerator 12 with the strongest cavitation resistance and the best protection performance on the side edge is required to be selected. The experiment shows that: among the linear gas-mixing ridge 12, the convex gas-mixing ridge 12, and the concave gas-mixing ridge 12, the concave gas-mixing ridge 12 has the longest gas-mixing protection length for the side of the flow channel, so the concave gas-mixing ridge 12 is selected as the gas-mixing ridge 12 of the present invention.
As shown in fig. 4, 7 and 11, the filter screen 3 is provided with a filter hole 31, the filter screen 3 is hollow, a vent hole communicated with the outside is provided beside the filter hole 31, the outside air can enter the outer casing 1 through the vent hole, and the cross section of the filter hole 31 is in a concave arc shape.
When water passes through the filter holes 31 through the design, the filter holes 31 can also play a role of aeration, and the aeration effect generated by the concave design has better protection effect on the drainage patterns 11.
As shown in fig. 2, 8 and 9, the lower part of the outer casing 1 is internally provided with a water wheel 4, the outer casing 1 is externally provided with a transmission assembly 5, the water wheel 4 is rotationally connected with the outer casing 1, the water wheel 4 is used for receiving the kinetic energy of water flow, the transmission assembly 5 is used for transmitting the kinetic energy received by the water wheel 4 to the filter screen 3, and the filter screen 3 can be driven to rotate by the water wheel 4 only when water flows through the outer casing 1, so that a power mechanism is saved, the energy consumption is reduced, and the cost is saved; the transmission assembly 5 comprises: a power bevel gear 51, a transmission bevel gear 52, a power pulley 53, a transmission pulley 54, and a belt 55;
the power bevel gear 51 is fixedly connected with the rotating shaft of the water wheel 4 in a coaxial mode, the power bevel gear 51 is meshed with the transmission bevel gear 52, the power pulley 53 is fixedly arranged on the transmission bevel gear 52 in a coaxial mode, the power pulley 53 is attached to the belt 55, the transmission pulley 54 is attached to the belt 55, and the transmission pulley 54 is fixedly connected with the rotating shaft of the filter screen 3 in a coaxial mode.
When specifically operating, when the rivers pass shell 1, rivers can drive water wheels 4 and rotate, and the rotation of water wheels 4 can drive power bevel gear 51 through self pivot and rotate, power bevel gear 51's rotation can drive transmission bevel gear 52 and rotate, transmission bevel gear 52's rotation can drive power band pulley 53 through its pivot and rotate, power band pulley 53 can drive the rotation of driving band pulley 54 through belt 55, driving band pulley 54 drives filter screen 3 and rotates, filter screen 3 pivoted direction is opposite with the guide flow line 11 spiral direction.
As shown in fig. 8 and 10, each blade of the water wheel 4 is provided with an air-mixing hole 41, the water wheel 4 is hollow, an air vent communicated with the outside is provided beside the air-mixing hole 41, the outside can convey air to the inside of the outer shell through the air-mixing hole, and the cross section of the air-mixing hole 41 is convex arc.
When water passes through the air-mixing holes 41, the air-mixing holes 41 can also play the function of air mixing; because the water wheel 4 is very close to the water pump at the bottom end, the cavity backwater depth must be reduced as much as possible so as to protect the water pump; the experiment shows that: in the linear aerator 12, the convex aerator 12 and the concave aerator 12, the cavity backwater depth of the convex aerator is smaller than that of the other two aerators 12, and the convex aerator has the best performance of reducing the cavity backwater depth, so that the aerator 12 adopts a coating arc design.
As shown in fig. 2, a flow direction measuring instrument 6 is installed in the middle of the inner surface of the outer shell 1, and the flow direction measuring instrument 6 is electrically connected with a control system.
An operator can monitor the flow direction of the water flow in the device through the control system; when the control system finds that abnormal flow or disturbance occurs in the water flow direction through the flow direction measuring instrument 6, an alarm is given to a monitoring person, and the monitoring person removes the outer shell 1 to solve the internal problems of the device, such as cleaning the filter screen 3 blocked and replacing the damaged filter screen 3. By providing the flow direction measuring instrument 6, an external operator can find out the internal faults of the device without opening the device.
As shown in fig. 2, a flow rate measuring instrument 7 is installed in the middle of the inner surface of the outer shell 1, and the flow rate measuring instrument 7 is electrically connected with a control system.
The flow meter is used for detecting the flow in the device and transmitting data to the control system, and the control system records the data and judges the internal fault condition of the device by combining the flow direction measuring instrument 6.
The working flow is as follows: when water enters from the water inlet pipe 2, the water flow clings to the inner wall of the outer shell 1 under the action of centrifugal force through the design of the direction of the water inlet pipe 2 and the arrangement of the drainage patterns 11, so that pressure is generated on the inner wall of the outer shell 1, cavitation is avoided, and the friction force of the inner wall surface of the outer shell 1 is increased; the center of the outer shell 1 forms a relatively stable cavity, which is beneficial to keeping the flow state of water flow stable.
When the water flows through the filter screen 3, large residues which are easy to damage the water pump are filtered, the purpose of aeration into the water is realized by the aeration ridge 12 and the filter holes 31, and the destructive force of cavity collapse can be reduced by aeration, namely the destructive force of cavitation erosion is reduced; in addition, the air is aerated into the water, so that the water hammer effect can be reduced, and the damage of the water hammer effect to the inner wall is further reduced; in addition, when enough air is doped in the water body, the negative pressure is effectively reduced, so that the occurrence probability of cavitation is reduced, and cavitation is even avoided.
And because the aeration ridge 12 and the filter screen 3 are both designed to be arc-shaped and concave, the aeration protection length of the concave aeration ridge 12 on the side edge of the flow channel is longest, so that the relatively weak drainage patterns 11 can be better protected.
After flowing through the filter screen 3, the water flow continuously flows downwards to push the water wheel 4 to rotate, the water wheel 4 drives the filter screen 3 to rotate in the opposite direction to the thread direction of the diversion lines 11 through the transmission system, and the purpose of rotating the filter screen 3 is achieved without an external power source; and when the water flow passes through the aerator 12 with the cross section of an outer convex arc on the water wheel 4, the backwater depth is further reduced. The water then spirals down into the pump with gravity.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides an improve rectification structure of porous inflow pump station inflow flow state, includes shell body (1), control system, inlet tube (2), its characterized in that:
a plurality of water inlet pipes (2) are fixedly arranged at the edge of the upper part of the outer shell (1), the interior of the water inlet pipes (2) is communicated with the interior of the outer shell (1), and the central axis of the water inlet pipes (2) is tangent to the circular arc of the horizontal section of the outer shell (1);
the middle part of the outer shell (1) is funnel-shaped, the inner surface of the middle part of the outer shell (1) is provided with spiral downward drainage patterns (11), the top of the outer shell (1) is of a detachable structure, and the bottom of the outer shell (1) is connected with a water pump;
the filter screen (3) is rotationally connected to the outer shell (1), the filter screen (3) is spiral, the threads of the filter screen (3) are equal to the threads of the drainage lines (11) in the same direction, and the filter screen (3) is attached to the drainage lines (11);
the inner surface of the outer shell (1) is also provided with an air-entraining ridge (12), the air-entraining ridge (12) is vertically arranged with the drainage patterns (11), and a through hole communicated with the outside is arranged below the air-entraining ridge (12);
the rotation direction of the filter screen (3) is opposite to the thread direction of the drainage threads (11);
the aerator (12) is designed to be concave in an arc shape;
the filter screen (3) is provided with a filter hole (31), the filter screen (3) is of a hollow design, a vent hole communicated with the outside is formed beside the filter hole (31), and the cross section of the filter hole (31) is of an inward concave arc shape;
the utility model discloses a water turbine, including shell body (1), transmission subassembly (5) are provided with in shell body (1) lower part inside, shell body (1) outside is provided with drive assembly (5), water wheel (4) are connected with shell body (1) rotation, water wheel (4) are used for receiving the kinetic energy of rivers, drive assembly (5) are used for transmitting the kinetic energy that water wheel (4) received to filter screen (3), drive assembly (5) include: a power bevel gear (51), a transmission bevel gear (52), a power belt pulley (53), a transmission belt pulley (54) and a belt (55);
the power bevel gear (51) is fixedly connected with the rotating shaft of the water wheel (4) in the same axis, the power bevel gear (51) is meshed with the transmission bevel gear (52), the power pulley (53) is fixedly arranged on the transmission bevel gear (52) in the same axis, the power pulley (53) is attached to the belt (55), the transmission pulley (54) is attached to the belt (55), and the transmission pulley (54) is fixedly connected with the rotating shaft of the filter screen (3) in the same axis.
2. The rectifying structure for improving inflow water flow state of a porous inflow pump station according to claim 1, wherein: the air-mixing holes (41) are formed in each blade of the water wheel (4), the water wheel (4) is of a hollow design, air holes communicated with the outside are formed beside the air-mixing holes (41), and the cross section of each air-mixing hole (41) is in an outwards convex circular arc shape.
3. A rectifying structure for improving inflow water flow state of a porous inflow pump station according to claim 2, wherein: the middle part of the inner surface of the outer shell (1) is provided with a flow direction measuring instrument (6), and the flow direction measuring instrument (6) is electrically connected with a control system.
4. A rectifying structure for improving the inflow regime of a porous inflow pump station according to claim 3, wherein: the middle part of the inner surface of the outer shell (1) is provided with a flow velocity measuring instrument (7), and the flow velocity measuring instrument (7) is electrically connected with a control system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211157426.9A CN115434951B (en) | 2022-09-22 | 2022-09-22 | Rectifying structure for improving water inflow state of porous inflow pump station |
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| CN202211157426.9A CN115434951B (en) | 2022-09-22 | 2022-09-22 | Rectifying structure for improving water inflow state of porous inflow pump station |
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| CN115434951B true CN115434951B (en) | 2023-06-02 |
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| EP0032086A2 (en) * | 1979-12-26 | 1981-07-15 | Bergeron-Rateau | Water pumping installation with a regulable floating water intake |
| CN102086892A (en) * | 2009-10-24 | 2011-06-08 | 陈久斌 | Eddy current device |
| CN102409653A (en) * | 2011-08-18 | 2012-04-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for relieving sill-lifting cavitation of suddenly-enlarged gallery for high-lift ship locks |
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| JP3631419B2 (en) * | 2000-06-23 | 2005-03-23 | ダイワ工業株式会社 | Method and apparatus for purifying eutrophied water |
| CN103374903B (en) * | 2013-08-14 | 2015-08-12 | 四川大学 | A kind of rotational flow silo of whole aeration |
| CN107975130A (en) * | 2017-11-27 | 2018-05-01 | 台州东屋洁具有限公司 | A kind of cyclone structure odour-proof floor drain |
| CN216108380U (en) * | 2021-09-03 | 2022-03-22 | 武汉中禹鸿建设工程有限公司 | Energy dissipation structure of flood drainage system of tailing pond |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0032086A2 (en) * | 1979-12-26 | 1981-07-15 | Bergeron-Rateau | Water pumping installation with a regulable floating water intake |
| CN102086892A (en) * | 2009-10-24 | 2011-06-08 | 陈久斌 | Eddy current device |
| CN102409653A (en) * | 2011-08-18 | 2012-04-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Method for relieving sill-lifting cavitation of suddenly-enlarged gallery for high-lift ship locks |
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| CN115434951A (en) | 2022-12-06 |
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