CN112393877A - Device for realizing complex water flow condition in sea area physical model - Google Patents
Device for realizing complex water flow condition in sea area physical model Download PDFInfo
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- CN112393877A CN112393877A CN202011224184.1A CN202011224184A CN112393877A CN 112393877 A CN112393877 A CN 112393877A CN 202011224184 A CN202011224184 A CN 202011224184A CN 112393877 A CN112393877 A CN 112393877A
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Abstract
The invention discloses a device for realizing complex water flow conditions in a sea area physical model, which comprises: the water pump is connected with a frequency converter, all the frequency converters are connected with the industrial personal computer, each water pump is communicated with the outflow port through the guide pipe and one, the inner section of the outflow port is installed with the water flow buffer module, the self-tightening flexible water blocking walls are connected with the two sides of the outflow port, and the self-tightening flexible water blocking walls are fixed on the model field.
Description
Technical Field
The invention relates to the technical field of sea area physical model simulation, in particular to a device for realizing complex water flow conditions in a sea area physical model.
Background
The sea area physical model test is to simulate boundary conditions and dynamic conditions similar to the prototype based on the similar principle of water flow and sediment motion mechanics by using fluid dynamics knowledge, and is used in researching the water flow structure, seabed evolution process and engineering scheme effect of sea area landform under the influence of structures.
Traditional sea area physical model adopts the topography to mould rivers, utilizes the change of gravity and topography to change the rivers direction, utilizes the water head to adjust the velocity of flow size, and water is followed control edge mouth and is gone out the back, need through tens meters or longer region and come the big or small direction of even rivers to guarantee that the rivers size direction and the flow field distribution in the test area satisfy experimental demand. The scheme is adopted by large-scale overall physical models of various domestic scientific research institutes all the time. The method can better meet the water flow conditions and is more visual visually, but the method has the obvious defect of large floor area, and takes a certain green petrochemical integral physical model in Zhejiang as an example, the area of an effective test area is about 70 square meters, but the area of the whole model is more than 700 square meters, nearly ten times of area and more area, and the method is mainly used for stabilizing and setting the water flow and meeting the test requirements when the water flow flows to the effective test area. The extra area and the manufacturing requirement are the same as those of a test area, the manufacturing needs to be reduced in proportion according to actual landforms, civil construction needs to be carried out, a large amount of manpower and material resources are consumed, and the molding cycle of the whole model is long.
In addition, the water level is used as a boundary control variable, the realization effect is better when a single-opening door or a double-opening door with a longer distance is used, but the realization is very difficult when a plurality of openings or control openings are arranged at a shorter distance, a water outlet boundary needs to be manufactured for each opening, and an independent water level meter is required to be arranged at the boundary as a control station. The multi-port door model is extremely easy to cause the water flow to deviate to one side due to the control system and the water flow characteristics, the teeterboard phenomenon is caused, and the control is out of control.
Especially, if a rotating flow or other complex water flow in a sensitive area of the model needs to be simulated, for example, a rotating flow or jet flow effect is caused in a local range of a flow field, the existing water level simulation mode or other flow control means are difficult to realize, and the complex flow field is generally realized by placing a guide wall or other obstacles in the model, even if the complex flow field is poor in realization effect, the complex flow field is realized at present at the cost of loss of other non-sensitive flow field forms, and no good method is available at present.
Therefore, the conventional sea area model simulation technology has three significant limitations: large occupied area, difficult realization of a multi-port door model and difficult realization of complex water flow conditions.
Disclosure of Invention
The embodiment of the invention aims to provide a device for realizing complex water flow conditions in a sea area physical model, so as to at least solve the problems of large occupied area, difficulty in realizing a plurality of doors, difficulty in realizing complex water flow conditions and the like in the related technology.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an apparatus for achieving complex current conditions in a physical model of the sea, comprising: the water pump is connected with a frequency converter, all the frequency converters are connected with the industrial personal computer, each water pump is communicated with the outflow port through the guide pipe and one, the inner section of the outflow port is installed with the water flow buffer module, the self-tightening flexible water blocking walls are connected with the two sides of the outflow port, and the self-tightening flexible water blocking walls are fixed on the model field.
Further, the water pump is a variable frequency submersible pump and is used for providing water flow power for the physical model.
Further, the outlet is a square or round tubular outlet.
Further, still include the steering support, the outfall is installed on the steering support.
Furthermore, a screw hole is formed below the steering support and is fixed on a model field through an expansion screw.
Furthermore, waterproof zippers are pasted on two sides of the front end of the outflow opening in an extending mode and are used for being spliced with the self-tightening flexible water blocking wall.
Further, the conduit is a flexible steel support hose.
Furthermore, the whole self-tightening flexible water blocking wall is of an L-shaped structure.
Furthermore, the water blocking wall further comprises a weight, and the weight is reinforced and fixed at the transverse edge of the water blocking wall for pressurization.
Furthermore, the water flow buffering module is composed of two layers of buffering, the first layer is a porous plastic plate and used for energy dissipation of the first layer of fluid, and the second layer is a plastic blind ditch structure and used for further buffering and stabilizing the fluid.
According to the technical scheme, the invention has the following beneficial effects:
1. the water pump pumps the water body into the sea area model, the output flow is controlled by the frequency converter at first, the output water body flow is ensured to meet the boundary requirement, then the output water body flow is uniformly mixed by the double-layer buffer in the outflow port, the uniformly mixed water body can directly act on the sea area engineering area, the process that the water flow is regulated by large-area redundant terrains in the traditional model is omitted, and the test floor area can be effectively reduced;
2. the output flow is controlled by the frequency converter, each outflow port is independently provided with a flow output curve, the water level is not adopted as a control condition, the outflow ports are completely independent and do not interfere with each other, the common phenomenon of water flow seesaw is avoided, and the multi-port sea area model is simpler to realize;
3. the design of the turnable outflow ports is adopted, the outflow ports are movable and convenient to arrange, when a complex and complicated flow field needs to be realized, the distribution condition of the flow boundaries around the complex flow field area is given firstly, one or more outflow port doors are generalized according to actual needs, then the outflow ports are arranged around the complex flow field, the directions of the outflow ports are adjusted, the outflow port flow output curves are configured according to the flow boundary conditions, the flow conditions of the complex flow field can be realized through simple debugging, and the complex flow field does not need to be realized by placing guide walls or other obstacles in a model.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic overall structural diagram of an apparatus for implementing complex water flow conditions in a physical model of a sea area according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection of a water pump, a conduit and a self-tightening flexible water blocking wall according to an embodiment of the present invention;
FIG. 3 is a schematic view of the spout steering lock and waterproof zipper in an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the connection of a water pump, a frequency converter and an adjustable tap in the embodiment of the present invention;
FIG. 5 is a schematic view of the arrangement of the water flow buffering module inside the tap outlet according to the embodiment of the invention;
FIG. 6 is a schematic view of a porous plastic sheet in an embodiment of the present invention;
FIG. 7 is a schematic view of a plastic blind groove structure according to an embodiment of the present invention;
FIG. 8 is a schematic front view of a self-tightening flexible water blocking wall according to an embodiment of the present invention;
FIG. 9 is a schematic left side view of the self-tightening flexible water blocking wall according to the embodiment of the present invention;
in the figure: the device comprises a water pump 1, an outflow port 2, a guide pipe 3, a steering support 4, a self-tightening flexible water blocking wall 5, a frequency converter 6, a water flow buffer module 7, a model field 8, an industrial personal computer 9, a waterproof zipper 10, screws 2-1, a porous plastic plate 7-1 and a plastic blind ditch structure 7-2.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Referring to fig. 1 to 9, the present embodiment provides an apparatus for implementing complex water flow conditions in a physical model of sea area, including: a plurality of water pumps 1, outfall 2, pipe 3, steering support 4, the flexible wall that blocks water of self-clinching formula 5, converter 6, rivers buffer module 7, model place 8, industrial computer 9, every all be connected with converter 6 on the water pump 1, all converter 6 all links to each other with industrial computer 9, every water pump 1 passes through pipe 3 and one outfall 2 are linked together, 2 internal cross-section installations of outfall rivers buffer module, the flexible wall that blocks water of self-clinching formula 5 is connected the both sides of outfall 2, the flexible wall that blocks water of self-clinching formula 5 is fixed on the model place 8.
In this embodiment, the water pump 1 is a high-flow and high-lift water pump, and is used for providing water flow power for the physical model. Water is injected into the physical model through the water pump 1, and under the condition that the submerging depth of the water pump 1 is fixed, the output flow and the frequency have a stable corresponding relation. The water pump 1 is mainly selected according to the flow rate and the lift, the flow rate of the water pump is selected according to the flow rate required by the model, the lift is determined according to the head difference between a reservoir and the model, the pressure loss of the water pump and the tightness of a water pipeline are considered, the lift of the water pump is more than about thirty percent of the head difference, therefore, the flow output by the water pump can meet the flow rate requirement, meanwhile, the initial water flow is stable, and the subsequent water flow buffering is better processed; the water pump adopts the converter to control, and a water pump configuration converter changes water pump output flow through adjusting the water pump rotational speed, can effectively reduce water pump quantity like this, a plurality of flow curves of water pump exportable, and the output frequency of converter is controlled by industrial control unit.
In the embodiment, the outflow opening 2 is a square or round tubular outlet, and the outflow opening can be replaced by a round or square outlet at any time according to specific requirements and is made of an iron sheet made of stainless steel, so that the antirust property is good, and the shape molding is simple. The inside of the outflow port is provided with two layers of water flow buffer modules, the length of the water flow buffer modules is about 80cm, and the outflow port is connected with a water pump through a guide pipe. Furthermore, the water flow direction adjusting device further comprises a steering support 4, the water outlet 2 is installed on the steering support 4, the direction of the water outlet can be adjusted left and right under the matching of the water outlet steering support, the direction of the water flow is changed through adjusting the direction, and each water outlet is provided with the steering support so as to meet the requirement of the required flow direction. Water flow is conveyed to the outflow ports through the water pump through the guide pipes, the direction and the flow of each outflow port can be adjusted to form a flow velocity vector, and the flow field requirements on the surface of the test area are met by adjusting the flow velocity vectors of the outflow ports.
In this embodiment, the lower portion of the steering support 4 is provided with a screw hole, the steering support is fixed on a model field 8 through an expansion screw, and after the direction of the steering support is adjusted, the steering support is fastened through a screw 2-1 which is provided with a locking and fixing portion and arranged above the steering support 4.
In this embodiment, the two sides of the front end of the outflow opening 2 are pasted with waterproof zippers 10 for splicing with the self-tightening flexible water-blocking wall. The traditional model adopts a form of a cement wall at the water outlet boundary, the invention adopts a recyclable self-tightening flexible water blocking wall, the boundary is constructed by splicing a plurality of light plastic baffles, the splicing can be carried out movably as required, and the water blocking walls are assembled in a form of waterproof zippers.
In this embodiment, the conduit 3 is preferably a flexible steel support hose. The flexible steel support hose is a screwed pipe with a steel ring inside and is used for connecting the water pump with the adjustable outflow port, so that the flexible steel support hose can be bent moderately and does not lose head pressure.
In this embodiment, the self-tightening flexible water-blocking wall 5 is an L-shaped structure as a whole. The water blocking wall is spliced with the turnable outflow port, the port door forming one outlet is fixed on a model field, the main size is 1m wide, other sizes can be customized, the water blocking wall is convenient to unload and move, and the water blocking wall can be firmly adsorbed on the ground under the action of water pressure to form a water blocking wall.
In the embodiment, the water flow buffer module 7 is composed of two layers of buffers, wherein the first layer is a porous plastic plate 7-1, the diameter of each hole is 0.8cm, the distance between every two holes is 1cm, the holes are uniformly distributed and used for dissipating energy of the first layer of fluid and primarily decelerating and uniformly mixing water flow; the second layer is a plastic blind ditch structure 7-2 and is used for further buffering and stabilizing the fluid, the water flow can be buffered and uniformly mixed to the maximum extent, and the flow state tends to be stable after the water flow is buffered by two layers, so that the water flow can be directly acted on a test area.
In this embodiment, converter 6 adopts mitsubishi F800 series product, and one end is connected with water pump 1, and the other end is connected with industrial computer 9, can real-time control change water pump output frequency through the industrial computer, and then the water of output different flow. The industrial personal computer adopts a porphyrizing H610 series industrial personal computer, has better working stability and dustproof and moistureproof design, and can stably work for a long time under the moist and dusty condition of a test field.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Taking a multi-port sea area model as an example, assuming that 3 outflow ports or control boundaries are needed in the whole model design, firstly, calculating according to the actual engineering flow field condition or a digital analog, giving the flow and water level processes of three ports, converting the processes into the model flow and water level according to the scale designed by the model, obtaining the flow of the ports, and then configuring a frequency control curve for each port according to the flow frequency curve of a water pump.
According to the arrangement distribution of the experimental model and the figure 2, the position of the outflow opening 2 is determined, the direction of the outflow opening 2 is adjusted left and right according to the distribution of the flow direction of the outflow opening 2, and after the adjustment is finished, the screw 2-1 is screwed; the outlet 2 is connected with a water pump 1 through a conduit 3, and the water pump 1 is vertically arranged in the reservoir. In addition, the position of the door is an adjustable movable position, and the door can move forwards and backwards appropriately and is adjusted appropriately according to the field condition of the model. According to the figures 5-7, a water flow buffering module 7 is arranged in the outflow opening 2, the first layer is a porous plastic plate 7-1, the second layer is a plastic blind ditch structure 7-2 in a bubble surface shape, after the position of the outflow opening is determined, the self-tightening flexible water blocking wall 5 is connected with the outflow opening 2 to form a model boundary, the self-tightening flexible water blocking wall 5 and a waterproof zipper 10 of the outflow opening 2 are all fixedly locked, the joint of the self-tightening flexible water blocking wall 5 with the ground can be filled with oil plasticine, the waterproof performance is enhanced, the water leakage condition in the experimental process is prevented, and the leakage detection and the defect filling can be performed in the experimental process in the step.
The water pump 1 is arranged in a reservoir, is submerged at a proper working depth, is fixedly connected with the outflow ports through the guide pipes 3 with the same aperture as the water pump 1, the lengths of the guide pipes 3 of the outflow ports 2 are generally consistent, the water pump 1 supplies power through the frequency converter 6, and the frequency converter 6 is connected with a controlled industrial personal computer 9 through an Ethernet port.
And the industrial personal computer 9 controls each frequency converter 6 to output different frequency curves, and the different frequency curves are converted into flow curves of each outflow port 2.
Before formal rating, initial release debugging is needed, and the following points are mainly checked:
if the water leakage is not caused by the water leakage of the conduit 3 connected with the water pump 1 at the outflow port 2, the fixation is strengthened.
Whether the self-tightening flexible water blocking wall 5 is fixed is firm, because the self-tightening flexible water blocking wall 5 belongs to the pressure-bearing self-tightening design, when the water level is low, a local water leakage phenomenon can occur, and the problem can be solved by adding a balancing weight on the transverse edge of the self-tightening flexible water blocking wall 5 and blocking the water leakage by using the internal plasticine.
Whether the time lags of the water outlets 2 are consistent or not is judged, the time lags are the time lags of the water flow from the water pump 1 to the water outlets 2, the link is very important, and if the time lags are not consistent, the water outlet time sequence of the water outlets 2 is disordered. When the time lag is different, the length of the connecting conduit 3 between the water pump 1 and the flow port 2 can be generally adjusted to solve the problem, and if the time lag is smaller, the problem can be solved by increasing or reducing the radian and the curvature of the conduit 3.
After the arrangement of the water pump 1, the steerable outflow port 2, the conduit 3, the steering support 4 of the outflow port, the self-tightening flexible water blocking wall 5, the frequency converter 6, the water flow buffer module 7, the industrial personal computer 9 and the like is completed, a relevant measuring instrument, generally a current meter, a water level meter and other devices, needs to be placed on the model field 8 for measuring the water level and the flow rate condition of each key point of the model in real time.
To this end, preparation work in earlier stage has been accomplished, begins to carry out formal flow and rates, earlier through water pump 1 to model place 8 internal water injection, when the water level reaches take the altitude and the velocity of flow is close to for zero, the procedure begins to start automatic control, and industrial computer 9 assigns control frequency curve for converter 6, and water pump 1 is under converter 6's control, and the flow that releases according to the predesigned. Generally, the flow curve given for the first time is not an optimum curve, and a frequency curve needs to be continuously optimized in the debugging process according to the actual flow field requirements until the flow field of the model meets the test requirements, and the water level and the flow rate of each key point meet the digital-analog verification result or correspond to the prototype.
After the calibration is finished, the experiment can be formally carried out, the specific process is similar to the calibration, water is injected to the water level with zero flow velocity through the water pump 1, then the water is controlled by the industrial personal computer 9, and the frequency converter 6 controls the output flow curve of the water pump 1 to carry out the experiment.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An apparatus for achieving complex current conditions in a physical model of the sea, comprising: the water pump is connected with a frequency converter, all the frequency converters are connected with the industrial personal computer, each water pump is communicated with the outflow port through the guide pipe and one, the inner section of the outflow port is installed with the water flow buffer module, the self-tightening flexible water blocking walls are connected with the two sides of the outflow port, and the self-tightening flexible water blocking walls are fixed on the model field.
2. The device for realizing complex water flow conditions in the sea area physical model according to claim 1, wherein the water pump is a submersible pump for providing water flow power for the physical model.
3. The device for realizing complex water flow conditions in the physical model of the sea area as claimed in claim 1, wherein the outlet is a square or round tubular outlet.
4. The apparatus of claim 1, further comprising a turning bracket, wherein the outflow port is mounted on the turning bracket.
5. The device for realizing complex water flow conditions in the physical model of the sea area as claimed in claim 4, wherein the steering bracket is provided with screw holes at the lower part and is fixed on the model field through expansion screws.
6. The device for realizing complex water flow conditions in the physical model of the sea area as claimed in claim 1, wherein waterproof zippers are pasted on two sides of the front end of the water outlet in an extending manner and used for being spliced with the self-tightening flexible water blocking wall.
7. An apparatus for achieving complex water flow conditions in a physical model of the sea area according to claim 1, wherein the conduit is a flexible steel support hose.
8. The apparatus for realizing complex water flow conditions in a physical model of sea area according to claim 1, wherein the self-tightening flexible water blocking wall is of an L-shaped structure as a whole.
9. The apparatus for realizing complex water flow conditions in the physical model of sea area according to claim 1, further comprising a weight, wherein the weight is reinforced and pressurized at the transverse edge of the water-blocking wall.
10. The device for realizing complex water flow conditions in the physical model of the sea area according to claim 1, wherein the water flow buffering module is composed of two layers of buffering, the first layer is a porous plastic plate and used for energy dissipation of the first layer of fluid, and the second layer is a plastic blind ditch structure and used for further buffering and stabilizing the fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011224184.1A CN112393877A (en) | 2020-11-05 | 2020-11-05 | Device for realizing complex water flow condition in sea area physical model |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834167A (en) * | 2021-03-19 | 2021-05-25 | 中国海洋大学 | Simulation experiment circulating water tank |
| CN114441293A (en) * | 2022-02-11 | 2022-05-06 | 浙江大学 | Complicated water flow scouring erosion bank slope simulation device and method thereof |
-
2020
- 2020-11-05 CN CN202011224184.1A patent/CN112393877A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834167A (en) * | 2021-03-19 | 2021-05-25 | 中国海洋大学 | Simulation experiment circulating water tank |
| CN114441293A (en) * | 2022-02-11 | 2022-05-06 | 浙江大学 | Complicated water flow scouring erosion bank slope simulation device and method thereof |
| CN114441293B (en) * | 2022-02-11 | 2022-11-25 | 浙江大学 | Complicated water flow scouring erosion bank slope simulation device and method thereof |
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