Liftable rainfall device capable of simulating rainfall under multiple working conditions and neutralizing return water

Abstract

The invention discloses a liftable rainfall device capable of simulating rainfall under multiple working conditions and neutralizing return water, and belongs to the technical field of mining engineering rainfall equipment. Comprising a lifting partition rainfall device, a lifting filtering device and a neutralization water return device, the lifting partition rainfall device is installed above the lifting filtering device, the neutralization water return device is installed on one side of the lifting filtering device, the inlet end of the neutralization water return device is connected with the outlet end of the lifting filtering device, and the outlet end of the neutralization water return device is connected with a water supply steel frame of the lifting partition rainfall device. According to the invention, rainfall simulation under various working conditions can be realized, and effusion, including fluid and solid, after a rainfall experiment can be effectively collected and preliminarily filtered, so that subsequent experiment extraction is facilitated. And an exudate enters a neutralization water return device after being preliminarily filtered, and can directly enter a sedimentation tank for water return after a neutralization experiment is completed. The device can basically simulate actual rainfall conditions under various conditions, and provides powerful support for engineering experiments.

Description

Technical Field

[0001] The present invention relates to a rainfall device that can be lifted, simulate rainfall under multiple working conditions and realize neutralization and return of water, belonging to the technical field of rainfall equipment for mining engineering. Background Technique

[0002] With the continuous progress of science and technology in the engineering field of our country, the number of scholars engaged in research in the engineering field is increasing day by day. Among many research directions in the engineering field, physical experiments often rely on rainfall devices. This is because under the actual engineering background, rainfall, as a key factor, has a significant impact on the processes and results of many experiments. The following is the application of rainfall devices in several typical experiments:

[0003] Simulating natural rainfall for soil moisture analysis: In the study of soil erosion, artificial rainfall simulators are commonly used tools to simulate natural rainfall for scientifically analyzing and evaluating soil moisture conditions. By comprehensively considering influencing factors such as vegetation type and geological conditions, the phenomenon of soil erosion can be dynamically observed. For example, conducting simulated rainfall experiments can not only reveal the laws of soil erosion and the mechanism of soil and water conservation, but also strengthen exchanges and cooperation with field joint experimental stations, improving the comprehensiveness and reliability of research.

[0004] Studying the properties of compacted clay using an indoor simulated rainfall device: Taking the engineering clay in Wuhan area as the research object, based on the measured data of seasonal rainfall in the country, a method combining experimental simulation and actual measurement is adopted. With the help of a self-designed indoor simulated rainfall device, relevant research on the properties of compacted clay is carried out. This device can accurately simulate the rainfall process in nature and is easy to operate. Through application experiments, the splash erosion law of compacted clay under the action of rainfall is summarized, which helps to deeply study the influence of different rainfall factors, soil slope, soil type, land use and soil and water conservation measures on soil erosion.

[0005] Studying the disaster characteristics and mechanism of rainfall-induced landslides through on-site simulation: By simulating artificial rainfall-induced landslides on-site and real-time monitoring parameters such as slope fissures, deep soil displacement, pore water pressure, and surface runoff, the disaster characteristics and mechanism of landslides under rainfall conditions are explored. At the same time, physical and mechanical parameters such as the shear strength index of the soil and the morphological characteristics of the sliding surface are obtained through experiments, providing a theoretical basis for landslide disaster prevention and control.

[0006] Study on the relationship between soil erosion and rainfall density: The rainfall device can simulate natural rainfall with different rainfall intensities. For example, the artificial rainfall simulation system can simulate within the continuous variation range of rainfall intensities from 20 to 200 mm / h, and the regulation range of raindrop size is 0.5 - 6.0 mm. This enables researchers to observe the soil erosion situation under different rainfall conditions. Since it is difficult to encounter rainfall with specific rainfall intensities and raindrop sizes in the natural environment for special research, the rainfall device overcomes the drawback of uncontrollable natural rainfall, can repeat experiments in a short time, and greatly shortens the experimental research cycle.

[0007] Study on the impact of rainfall on the watershed hydrological process: Rainfall is the direct source of water resources and has a direct impact on the watershed hydrological process. The rainfall device helps researchers deeply understand the runoff generation and confluence processes of rainfall in the watershed by simulating the rainfall process. For example, in the simulated rainfall confluence test device, the rainfall area reaches 108 m 2 , which is managed by a microcomputer and realizes the full automation of the whole process of rainfall, detection, recording, display, printing, and plotting, providing reliable data support for the study of watershed hydrological physical experiments. Through multiple simulated rainfall experiments, the hydrological processes under different topographies, soils, vegetation, etc. can be studied, providing a scientific basis for the design and planning of water conservancy projects such as reservoirs and dams.

[0008] The following technical problems exist in the existing technologies:

[0009] (1) The problem of efficient utilization of water resources

[0010] Most traditional rainfall devices adopt an open water supply mode. In this mode, the recycling rate of water resources is extremely low. Due to the lack of a closed-loop water circulation system, a large amount of water resources are directly discharged after one use. Moreover, the existing water quality purification systems have a single function and rely only on simple filtration devices, which simply cannot effectively remove pollutants in rainwater, making it very difficult to reuse water resources. Especially in the case of long-term continuous rainfall experiments, this problem of water resource waste is more serious, having a great impact on the sustainability of the experiments.

[0011] (2) Limitations in working condition simulation capabilities

[0012] Most traditional rainfall devices can only achieve the adjustment of a single parameter, such as only being able to change the rainfall amount or rainfall intensity. For the coordinated regulation of multiple parameters, such as raindrop size, rainfall angle, and the simulation of dynamic change processes, it is thus difficult to meet the requirements of complex rainfall experiments. Taking the protection research under extreme weather conditions as an example, the existing devices simply cannot simulate a rainfall process with sudden characteristics.

[0013] (3) Constraints on engineering applications

[0014] Most traditional rainfall devices adopt a fixed structural design, which leads to the need for a large amount of space for installation and debugging, usually requiring at least 50 square meters of dedicated site. In some special environments, such as the field site or restricted space, the existing devices cannot meet the requirements of mobile operation due to their large volume and complex installation, severely restricting their application scope.

[0015] In summary, the existing rainfall simulation devices have obvious deficiencies in aspects such as water resource utilization efficiency, working condition simulation ability, and engineering application adaptability. These technical bottlenecks not only limit the research progress in related fields but also cannot meet the requirements of actual engineering applications. Therefore, we need to develop a new type of rainfall simulation device with efficient water resource recycling, multi-parameter collaborative regulation, and reduced site constraints. Summary of the Invention

[0016] The technical problem to be solved by the present invention is to provide a rainfall device that can be lifted, simulate rainfall under multiple working conditions, and achieve neutralization and water recycling. This rainfall device can simulate the rainfall process under various complex conditions and can realize the filtration of precipitation and the analysis and recycling of recycled water.

[0017] To achieve the above object, the technical solution adopted by the present invention is: a rainfall device that can be lifted, simulate rainfall under multiple working conditions, and achieve neutralization and water recycling, including a lifting partition rainfall device 3, a lifting filtration device 5, and a neutralization and water recycling device 6. The lifting partition rainfall device 3 is installed above the lifting filtration device 5, and the neutralization and water recycling device 6 is installed on one side of the lifting filtration device 5, and its inlet end is connected to the outlet end of the lifting filtration device 5, and the outlet end is connected to the water supply steel frame of the lifting partition rainfall device 3.

[0018] Specifically, the lifting partition rainfall device 3 includes a rainfall frame support 1, a rainfall frame lifting sliding shaft 4, a rainfall frame top frame 7, a rainfall nozzle group 9, a rainfall frame pulley 10, an acidic rainfall reagent bottle 12, a trace element rainfall reagent bottle 13, and an alkaline rainfall reagent bottle 16;

[0019] The top frame 7 of the rainfall rack is composed of several water supply steel frames. The water supply steel frames divide the top frame 7 of the rainfall rack into multiple rainfall areas. Each rainfall area is equipped with a set of rainfall nozzle groups 9. A rainfall rack pulley 10 is installed at the bottom of the rainfall rack support frame 1. The rainfall rack support frame 1 is fixed below the four corners of the top frame 7 of the rainfall rack. The steel frames of the rainfall rack support frame 1 completely coincide with the water supply steel frames at the four corners of the top frame 7 of the rainfall rack. A rainfall rack lifting sliding shaft 4 is installed on the outside of the rainfall rack support frame 1. The top frame 7 of the rainfall rack is located above the rainfall rack support frame 1 and is slidably installed in the rainfall rack lifting sliding shaft 4. An acidic rainfall reagent bottle 12, an alkaline rainfall reagent bottle 16, and a trace element reagent bottle 13 are installed on the top frame 7 of the rainfall rack and are communicated with its water supply steel frame. The acidic rainfall reagent bottle 12 is placed on the east side of the top frame 7 of the rainfall rack. Two acidic rainfall reagent bottles 12 are installed at intervals of one rainfall area. The trace element reagent bottle 13 is placed on the north side of the top frame 7 of the rainfall rack. Three trace element reagent bottles 13 are installed at intervals of one rainfall area. Two alkaline rainfall reagent bottles 16 are placed on the west side of the top frame 7 of the rainfall rack. Two alkaline rainfall reagent bottles 16 are installed at intervals of one rainfall area. The water supply steel frame of the top frame 7 of the rainfall rack is simultaneously communicated with the return water pipeline of the neutralization return water device 6.

[0020] Preferably, adjustable-speed fans 2 in the west, 8 in the south, 11 in the east, and 14 in the north are respectively installed at the middle positions of the four sides of the top frame 7 of the rainfall rack.

[0021] Specifically, the rainfall nozzle group 9 includes a rainfall nozzle support frame 17, a water supply pipeline 18, a rainfall nozzle 19, an upper seal 20, a control connecting piece 21, a lower seal 22, a nozzle 23, a control valve 24, and a pressure controller 25. The water supply pipeline 18 is respectively connected to the four sides of the rainfall nozzle support frame 17. The lower end of the water supply pipeline 18 is connected to the rainfall nozzle 19. The rainfall nozzle 19 is connected to the control connecting piece 21 below. The control connecting piece 21 is connected to the nozzle 23 below. A pressure controller 25 is installed on the rainfall nozzle 19. A control valve 24 is provided on the control connecting piece 21. An upper seal 20 is installed at the connection between the rainfall nozzle 19 and the control connecting piece 21. A lower seal 22 is installed at the connection between the control connecting piece 21 and the nozzle 23.

[0022] Preferably, the acidic rainfall reagent bottle 12, the trace element rainfall reagent bottle 13, and the alkaline rainfall reagent bottle 16 have the same structure, including a reagent bottle cap 26, a reagent bottle body 27, a scale line 28, a reagent bottle bottom 29, a reagent bottle outlet 30, and a reagent bottle plug 31. The transparent reagent bottle body 27 is located between the reagent bottle cap 26 and the reagent bottle bottom 29 and a scale line 28 is provided on its outer wall. A reagent bottle outlet 30 is provided on the reagent bottle bottom 29. A reagent bottle plug 31 is installed at the front end of the reagent bottle outlet 30.

[0023] Preferably, the rainfall rack support frame 1 is rectangular and is welded by a support frame horizontal steel frame and a support frame vertical steel frame. Two intersecting support frame horizontal steel frames are connected between the bottom vertices of the rainfall rack support frame 1.

[0024] Specifically, the lifting and filtering device 5 includes a primary filter plate 40 of the filter tank, a filter tank body 41, a lifting button 42 of the filter tank, a solid retention plate 43 of the filter tank, and a secondary filter plate of the filter tank. The primary filter plate 40 of the filter tank is installed at the top of the filter tank body 41, and the solid retention plate 43 of the filter tank is installed at the bottom. A lifting device is provided on the filter tank body 41. A lifting button 42 of the filter tank connected to the lifting device is provided on the solid retention plate 43 of the filter tank. A water outlet 44 of the filter tank is provided on the right side wall of the lifting button 42 of the filter tank. The water outlet 44 of the filter tank is connected to the neutralization return water device 6. A secondary filter plate of the filter tank is installed below the primary filter plate 40 of the filter tank. The primary filter plate 40 and the secondary filter plate of the filter tank are both provided with pores, and the pores on the secondary filter plate of the filter tank are smaller than the pores on the primary filter plate of the filter tank.

[0025] Specifically, the neutralization return water device 6 includes a neutralization filter tank 46, a neutralization alkali filter tank 51, a neutralization acid filter tank 64, a neutralization filtrate tank 53, and a sedimentation tank 55. The water inlet of the neutralization filter tank 46 is communicated with the water outlet of the lifting and filtering device 5 through a connecting pipe 45. The two water outlets of the neutralization filter tank 46 are respectively connected to the neutralization alkali filter tank 51 and the neutralization acid filter tank 64 through the connecting pipe 45. The water outlets of the neutralization alkali filter tank 51 and the neutralization acid filter tank 64 are respectively connected to the neutralization filtrate tank 53 through the connecting pipe 45. The water outlet of the neutralization filtrate tank 53 is connected to the bottom of the sedimentation tank 55 through the connecting pipe 45. Corresponding connecting pipe bolts 47 are installed on all the connecting pipes 45. A sampling port 48 of the neutralization filter tank is provided on the outer side wall of the neutralization filter tank 46. Sampling points 49 of the neutralization alkali filter tank and 65 of the neutralization acid filter tank are respectively provided on the outer side walls of the neutralization alkali filter tank 51 and the neutralization acid filter tank 64. Neutralization ports 50 of the neutralization alkali filter tank and 63 of the neutralization acid filter tank are respectively provided at the top. A sampling point 52 of the neutralization filtrate tank is provided on the outer side wall of the neutralization filtrate tank 53. A drainage port 54 of the sedimentation tank is provided at the bottom of the sedimentation tank 55, a return water port 62 of the sedimentation tank is provided at the top, a sampling point 56 of the sedimentation tank is provided on the right side wall, and a return water pump support frame 57 is installed inside. A sedimentation tank return water pump 59 is fixed on the return water pump support frame 57. The bottom of the vertical return water pipe 60 is inserted into the return water port 62 of the sedimentation tank and then connected to the sedimentation tank return water pump 59. The upper end of the vertical return water pipe 60 is communicated with the horizontal return water pipe 61. The end of the horizontal return water pipe 61 is communicated with the water supply steel frame of the lifting and zoning rainfall device 3.

[0026] Preferably, a sedimentation tank filter plate 58 is installed above the water inlet inside the sedimentation tank 55. The sedimentation tank filter plate 58 is installed below the return water pump support frame 57 and is provided with pores thereon.

[0027] The beneficial effects of the present invention are as follows: The device of the present invention can accurately simulate rainfall scenarios under different wind speed conditions, covering various wind speed ranges from gentle breeze to strong wind; at the same time, for rainfall with different pH values, whether it is acidic rainfall, alkaline rainfall or neutral rainfall, effective simulation can be achieved; in addition, for rainfall with different material compositions, such as rainfall containing specific chemical substances or impurities, highly restored simulation can also be carried out. In terms of rainfall parameter regulation, the device has flexible adjustment capabilities and can accurately adjust the rainfall speed, rainfall amount and raindrop diameter to meet diverse experimental requirements.

[0028] To meet the detection and analysis requirements during the experiment, the rainfall device of the present invention is equipped with a simple and efficient neutralization and water recycling device. The neutralization and water recycling device can quickly and conveniently collect samples during or after rainfall and accurately detect the pH value of the filtered liquid, providing convenient conditions for the acquisition and analysis of experimental data; in terms of simulation ability, the device performs excellently in simulating various complex rainfall situations, can highly realistically reproduce various rainfall scenarios in nature, provides solid and reliable experimental data support for engineering experiments, and helps to improve the scientificity and accuracy of engineering experiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall structural schematic diagram of the present invention;

[0030] Figure 2 is the exploded view of the lifting and zoning rainfall device of the present invention;

[0031] Figure 3 is the structural schematic diagram of the rainfall nozzle group of the rainfall rack of the present invention;

[0032] Figure 4 is the structural schematic diagram of the reagent bottle of the rainfall rack of the present invention;

[0033] Figure 5 is the schematic diagram of the pulley of the rainfall rack of the present invention;

[0034] Figure 6 is the comparison schematic diagram of the lifting and lowering of the lifting and filtering device of the present invention, where the upper figure is the structural schematic diagram before the lifting and filtering device is lifted, and the lower figure is the structural schematic diagram after the lifting and filtering device is lifted;

[0035] Figure 7 is the structural schematic diagram of the neutralization and water recycling device of the present invention;

[0036] Figure 8 Schematic diagram of the sedimentation tank water pump.

[0037] The names corresponding to the reference numerals in the figure are as follows: rainfall rack support frame 1, west adjustable-speed fan 2, lifting partition rainfall device 3, rainfall rack lifting slide shaft 4, lifting filtration device 5, neutralization return water device 6, rainfall rack top frame 7, south adjustable-speed fan 8, rainfall nozzle group 9, rainfall rack pulley 10, east adjustable-speed fan 11, acidic rainfall reagent bottle 12, trace element rainfall reagent bottle 13, north adjustable-speed fan 14, rainfall rack bolt 15, alkaline rainfall reagent bottle 16, rainfall nozzle support frame 17, water supply pipe 18, rainfall nozzle 19, upper seal 20, control connection part 21, lower seal 22, nozzle 23, control valve 24, pressure controller 25, reagent bottle cap 26, reagent bottle body 27, graduation line 28, reagent bottle bottom 29, reagent bottle outlet 30, reagent bottle bolt 31, pulley connection part 32, pulley fixing part 33, pulley spring 34, tire connection frame 35, tire connection bolt 36, pulley tire 37, pulley retraction wrench 38, pulley fixing wrench 39, primary filter plate of filtration tank 40, filtration tank body 41, filtration tank lifting button 42, filtration tank solid retention plate 43, filtration tank water outlet 44, connecting pipe 45, neutralization filtration tank 46, connecting pipe bolt 47, sampling point of neutralization filtration tank 48, sampling point of neutralization alkali filtration tank 49, neutralization port of neutralization alkali filtration tank 50, neutralization alkali filtration tank 51, sampling point of neutralization filtrate tank 52, neutralization filtrate tank 53, sedimentation tank drain outlet 54, sedimentation tank 55, sampling point of sedimentation tank 56, return water pump support frame 57, sedimentation tank filter plate 58, sedimentation tank return water pump 59, vertical return water pipe 60, horizontal return water pipe 61, return water inlet of sedimentation tank 62, neutralization port of neutralization acid filtration tank 63, neutralization acid filtration tank 64, sampling point of neutralization acid filtration tank 65, water pump pump body 66, water pump mechanical seal 67, pump shaft carrier 68, shaft coupling 69, water pump base 70, bearing 71, rotor 72, water pump impeller 73. Detailed implementation manners

[0038] The following embodiments will further illustrate the present invention with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment 1: As Figure 1-8As described above, a rainfall device that can be lifted, simulate rainfall under multiple working conditions, and achieve neutralization and return of water includes a lifting and zoning rainfall device 3, a lifting and filtering device 5, and a neutralization and return water device 6. The lifting and zoning rainfall device 3 is installed above the lifting and filtering device 5. The neutralization and return water device 6 is installed on one side of the lifting and filtering device 5, and its inlet end is connected to the outlet end of the lifting and filtering device 5, and the outlet end is connected to the water supply steel frame of the lifting and zoning rainfall device 3. When the device is operating, each device has a clear division of labor. The lifting and zoning rainfall device 3 is responsible for controlling rainfall; the lifting and filtering device 5 undertakes the task of collecting and filtering rainfall seepage; the neutralization and return water device 6 neutralizes and returns the substances filtered by the lifting and filtering device to achieve recycling and reuse. The shape and size of the box body of the lifting and filtering device 5 change according to the range of the lifting and zoning rainfall device and can be adjusted to meet various experimental requirements.

[0040] Furthermore, the lifting and zoning rainfall device 3 includes a rainfall rack support frame 1, a rainfall rack lifting slide shaft 4, a rainfall rack top frame 7, a rainfall nozzle group 9, a rainfall rack pulley 10, an acidic rainfall reagent bottle 12, a trace element rainfall reagent bottle 13, and an alkaline rainfall reagent bottle 16;

[0041] The rainfall rack top frame 7 is composed of several water supply steel frames. The water supply steel frames divide the rainfall rack top frame 7 into multiple rainfall areas. Each rainfall area is equipped with 1 group of rainfall nozzle groups 9. A rainfall rack pulley 10 is installed at the bottom of the rainfall rack support frame 1. The rainfall rack support frame 1 is fixed below the four corners of the rainfall rack top frame 7. The steel frame of the rainfall rack support frame 1 completely coincides with the water supply steel frames at the four corners of the rainfall rack top frame 7. A rainfall rack lifting slide shaft 4 is installed on the outside of the rainfall rack support frame 1. The rainfall rack top frame 7 is located above the rainfall rack support frame 1 and is slidably installed in the rainfall rack lifting slide shaft 4. An acidic rainfall reagent bottle 12, an alkaline rainfall reagent bottle 16, and a trace element reagent bottle 13 that are communicated with its water supply steel frame are installed on the rainfall rack top frame 7. The acidic rainfall reagent bottle 12 is placed on the east side of the rainfall rack top frame 7, and 2 acidic rainfall reagent bottles 12 are installed at an interval of one rainfall area. The trace element reagent bottle 13 is placed on the north side of the rainfall rack top frame 7, and 3 trace element reagent bottles 13 are installed at an interval of one rainfall area. The alkaline rainfall reagent bottle 16 is placed on the west side of the rainfall rack top frame 7, and 2 alkaline rainfall reagent bottles 16 are installed at an interval of one rainfall area. The water supply steel frame of the rainfall rack top frame 7 is simultaneously communicated with the return water pipeline of the neutralization and return water device 6.

[0042] The lifting and zoning rainfall device 3 can simulate rainfall under multiple working conditions, specifically including rainfall conditions with different pH values, different trace elements, different rainfall amounts and raindrop diameters, as well as different wind speeds and wind directions. While realizing the simulation of rainfall under multiple working conditions, it can also conduct zoned rainfall simulation, and can simulate the rainfall in different regions under the same working conditions according to the actual direction. By using the method of controlling variables, the simulation of rainfall under multiple working conditions can be accurately achieved.

[0043] Further, adjustable-speed fans are respectively installed at the middle positions of the four sides of the top frame 7 of the rainfall rack, including a west adjustable-speed fan 2, a south adjustable-speed fan 8, an east adjustable-speed fan 11, and a north adjustable-speed fan 14.

[0044] As Figure 1 , 2 shown, the main structure of the lifting partition rainfall device 3 is a lifting rainfall rack, which is composed of 4 pairs of rainfall rack support frames 1 and 1 pair of rainfall rack top frames 7. The rainfall rack support frame 1 is rectangular parallelepiped-shaped and is welded by a support frame horizontal steel frame and a support frame vertical steel frame. Crossed support frame horizontal steel frames are connected between the bottom vertices of the rainfall rack support frame 1. In this embodiment, each pair of rainfall rack support frames 1 is composed of 10 support frame horizontal steel frames and 4 support frame vertical steel frames, and each steel frame is welded together, and the welding method is as Figure 2 shown. One pair of rainfall rack lifting sliding shafts 4 is installed on each pair of rainfall rack support frames 1. The rainfall rack top frame 7 can slide up and down through the rainfall rack lifting sliding shafts 4 on the 4 pairs of rainfall rack support frames 1 and can be adjusted according to experimental requirements. In order to realize the convenient movement and position adjustment of the rainfall rack, each pair of rainfall rack support frames 1 is equipped with a set of rainfall rack pulleys 10, and the rainfall rack pulleys 10 are composed of the following components, as Figure 5 shown: pulley connecting piece 32, pulley fixing piece 33, pulley spring 34, tire connecting frame 35, tire connecting bolt 36, pulley tire 37, pulley retracting wrench 38, pulley fixing wrench 39. The structure of the retractable runner is an existing commercially available component, so the connection relationship between the components will not be described in detail. The retractable runner enhances the mobility and flexibility of the device, and can quickly realize the position movement and state conversion of the device according to different engineering actual backgrounds and site conditions, effectively weakening the influence of site restriction factors on the experimental development.

[0045] The rainfall rack top frame 7 is welded by 52 water supply steel frames, and 12 water supply steel frames are welded into the general shape of the rainfall rack, as Figure 2 shown. Among them, 40 water supply steel frames divide the rainfall rack top frame 7 into 20 rainfall areas, and each rainfall area is equipped with a set of rainfall nozzle groups 9.

[0046] The 20 rainfall partitions on the rainfall rack top frame 7 are separated by 35 rainfall rack bolts 15. The rainfall rack bolts 15 can be manually controlled or controlled by a machine, and different types of rainfall rack bolts 15 can be replaced according to different experimental requirements to realize rainfall control in different partitions. 2 bottles of acidic rainfall reagent bottles 12, 2 bottles of alkaline rainfall reagent bottles 16 and 3 bottles of trace element reagent bottles 13 are equipped on the rainfall rack top frame 7 for storing different rainfall reagents to meet the adjustment requirements of rainwater components under different working conditions. The positions of different reagent bottles on the rainfall rack top frame 7 are as Figure 2As shown, in order to simulate different directions and wind speeds, the top frame 7 of the rainfall rack is equipped with a west adjustable-speed fan 2, a south adjustable-speed fan 8, an east adjustable-speed fan 11, and a north adjustable-speed fan 14, as Figure 2 shown.

[0047] Furthermore, the rainfall sprinkler group 9 includes a rainfall sprinkler support frame 17, a water supply pipe 18, a rainfall sprinkler 19, an upper seal 20, a control connecting piece 21, a lower seal 22, a nozzle 23, a control valve 24, and a pressure controller 25. The water supply pipes 18 are respectively connected to the four sides of the rainfall sprinkler support frame 17. The lower ends of the water supply pipes 18 are connected to the rainfall sprinklers 19. The rainfall sprinklers 19 are connected to the control connecting piece 21 below. The control connecting piece 21 is connected to the nozzle 23 below. The pressure controller 25 is installed on the rainfall sprinkler 19. The control valve 24 is provided on the control connecting piece 21. The upper seal 20 is installed at the connection between the rainfall sprinkler 19 and the control connecting piece 21. The lower seal 22 is installed at the connection between the control connecting piece 21 and the nozzle 23. Each group of the rainfall sprinkler group 9 is equipped with 4 rainfall sprinklers 19, and the nozzle aperture is 1 mm. Through the electronic control system, the rainfall-related parameters can be flexibly adjusted to achieve zoned rainfall, accurately adjust the raindrop diameter from 0 to 1 mm, and accurately control the rainfall amount.

[0048] Furthermore, the acid rainfall reagent bottle 12, the trace element rainfall reagent bottle 13, and the alkaline rainfall reagent bottle 16 have the same structure, including a reagent bottle cap 26, a reagent bottle body 27, a scale line 28, a reagent bottle bottom 29, a reagent bottle outlet 30, and a reagent bottle stopper 31. The transparent reagent bottle body 27 is located between the reagent bottle cap 26 and the reagent bottle bottom 29, and a scale line 28 is provided on its outer wall. The reagent bottle bottom 29 is provided with a reagent bottle outlet 30, and a reagent bottle stopper 31 is installed at the front end of the reagent bottle outlet 30.

[0049] Furthermore, the main body of the lifting and filtering device 5 is a lifting filter tank. This device can collect the exudates after the rainfall experiment, including fluids and solids, and preliminarily filter the exudates, providing convenience for subsequent experimental extraction. At the same time, this device has a lifting function and can adapt to rainfall simulation experiments under different working conditions, different heights, or different exudate conditions.

[0050] The described lifting and filtering device 5 includes a primary filter plate 40 of the filter tank, a filter tank body 41, a lifting button 42 of the filter tank, a solid retention plate 43 of the filter tank, and a secondary filter plate of the filter tank. The primary filter plate 40 of the filter tank is installed at the top of the filter tank body 41, and the solid retention plate 43 of the filter tank is installed at the bottom. A lifting device is provided on the filter tank body 41. The lifting button 42 of the filter tank, which is connected to the lifting device, is provided on the solid retention plate 43 of the filter tank. A water outlet 44 of the filter tank is provided on the right side wall of the lifting button 42 of the filter tank. The water outlet 44 of the filter tank is connected to the neutralization and return water device 6. The secondary filter plate is installed below the primary filter plate 40 of the filter tank. Both the primary filter plate 40 and the secondary filter plate of the filter tank are provided with pores, and the pores on the secondary filter plate of the filter tank are smaller than those on the primary filter plate.

[0051] The lifting and filtering device 5 uses the filter tank body 41 as the load-bearing structure; the lifting button 42 of the filter tank is used to control the lifting of the filter tank body 41 (how to control the lifting of the filter tank body 41 through the lifting button 42 of the filter tank can adopt various well-known techniques in the prior art and will not be described in detail in this embodiment). The height of the filter tank is determined by specific experimental requirements. The primary filter plate 40 and the secondary filter plate of the filter tank respectively conduct primary and secondary filtering on the exudate. The solid retention plate 43 of the filter tank is used to intercept solid substances. The specific component structure of the lifting and filtering device 5 is as Figure 6 shown.

[0052] Furthermore, the main function of the neutralization and return water device 6 is to filter the filtrate obtained by the lifting and filtering device 5 again to obtain the exudate after rainfall. This device can extract the filtrate and detect its acidity and alkalinity, and conduct a simple neutralization experiment. After the neutralization experiment is completed, the filtrate can be extracted again and its pH value can be detected. If it meets the standard, it can directly enter the sedimentation tank for return water, and the water is returned to the lifting and zoning rainfall device to achieve the reuse of water resources.

[0053] The neutralization return water device 6 includes a neutralization filtration tank 46, a neutralization alkali filtration tank 51, a neutralization acid filtration tank 64, a neutralization filtrate tank 53, and a sedimentation tank 55. The water inlet of the neutralization filtration tank 46 is communicated with the water outlet of the lifting filtration device 5 through a connecting pipe 45. The two water outlets of the neutralization filtration tank 46 are respectively connected to the neutralization alkali filtration tank 51 and the neutralization acid filtration tank 64 through the connecting pipe 45. The water outlets of the neutralization alkali filtration tank 51 and the neutralization acid filtration tank 64 are respectively connected to the neutralization filtrate tank 53 through the connecting pipe 45. The water outlet of the neutralization filtrate tank 53 is connected to the bottom of the sedimentation tank 55 through the connecting pipe 45. Corresponding connecting pipe bolts 47 are installed on all the connecting pipes 45. A neutralization filtration tank sampling port 48 is provided on the outer side wall of the neutralization filtration tank 46. A neutralization alkali filtration tank sampling point 49 and a neutralization acid filtration tank sampling point 65 are respectively provided on the outer side walls of the neutralization alkali filtration tank 51 and the neutralization acid filtration tank 64. A neutralization alkali filtration tank neutralization port 50 and a neutralization acid filtration tank neutralization port 63 are respectively provided at the tops. A neutralization filtrate tank sampling point 52 is provided on the outer side wall of the neutralization filtrate tank 53. A sedimentation tank drain port 54 is provided at the bottom of the sedimentation tank 55, a sedimentation tank return water port 62 is provided at the top, a sedimentation tank sampling point 56 is provided on the right side wall, and a return water pump support frame 57 is installed inside. A sedimentation tank return water pump 59 is fixed on the return water pump support frame 57. The bottom of the return water pipe vertical pipe 60 is inserted into the sedimentation tank return water port 62 and then connected to the sedimentation tank return water pump 59. The upper end of the return water pipe vertical pipe 60 is communicated with the return water pipe horizontal pipe 61. The end of the return water pipe horizontal pipe 61 is communicated with the water supply steel frame of the lifting partition rainfall device 3.

[0054] Further, a sedimentation tank filter plate 58 is installed above the water inlet inside the sedimentation tank 55. The sedimentation tank filter plate 58 is installed below the return water pump support frame 57 and has pores thereon.

[0055] The route of the filtrate obtained by the lifting filtration device 6 for relevant technical treatment in the neutralization return water device is as follows: lifting filtration device → neutralization filtration tank 46 → neutralization alkali filtration tank 51 / neutralization acid filtration tank 64 → neutralization filtrate tank 53 → sedimentation tank 55 → return water to the lifting partition rainfall device. The filter tank body 41 in the lifting filtration device is connected to the neutralization filtration tank 46 of the neutralization return water device through 2 connecting pipes 45, as Figure 1As shown, the connection between the neutralization return water device and the lifting filtration device can be realized, and all connecting pipes 45 are equipped with corresponding connecting pipe bolts 47. Among them, the neutralization filtration tank 46 is respectively connected to the neutralization alkali filtration tank 51 and the neutralization acid filtration tank 64 through one connecting pipe 45. Sampling is carried out at the neutralization filtration tank sampling point 48 of the neutralization filtration tank 46 to determine the pH value of the filtrate, and it is determined which corresponding connecting pipe bolt 47 needs to be opened to connect the connecting pipe 45 so that the filtrate flows into the corresponding neutralization alkali filtration tank 51 or neutralization acid filtration tank 64. Neutralization tests are carried out on the filtrate through the neutralization port 50 of the neutralization alkali filtration tank 51 and the neutralization port 63 of the neutralization acid filtration tank 64, and sampling is carried out at the corresponding neutralization alkali filtration tank sampling point 49 and the neutralization acid filtration tank sampling point 65 to determine the results of the neutralization test. There is one connecting pipe 45 on each of the neutralization alkali filtration tank 51 and the neutralization acid filtration tank 64 connected to the neutralization filtrate tank 53. When the sampling result meets the return water standard, the connecting pipe bolt 47 is opened, and the filtrate flows into the neutralization filtrate tank 53. In order to ensure that the liquid meets the return water standard, sampling can be carried out again at the neutralization filtrate tank sampling point 52. There are two connecting pipes 45 on the neutralization filtrate tank 53 connected to the sedimentation tank 55. When the secondary sampling result is also qualified, the connecting pipe bolt 47 is opened, and the liquid flows into the sedimentation tank 55 for return water operation. The inside of the sedimentation tank 55 is composed of the following components, such as Figure 7 shown: the return water pump support frame 57, the sedimentation tank filter plate 58, and the sedimentation tank return water pump 59. The function of the return water pump support frame 57 is to support the sedimentation tank return water pump 59. Among them, the sedimentation tank filter plate 58 performs the final sedimentation on the filtrate, and the final solid sediment can be collected through the sedimentation tank drain port 54. There are two sedimentation tank sampling points 56 on the sedimentation tank 55, which can realize real-time monitoring and sample retention of the return water water sample. In order to realize the return water operation, the whole device is equipped with a return water pipe vertical pipe 60 and a return water pipe horizontal pipe 61. Among them, the return water pipe vertical pipe 60 is inserted into the sedimentation tank return water port 62 directly above the sedimentation tank 55 and inserted to the position of the return water pump support frame 57, wrapping the sedimentation tank return water pump 59 therein. The return water pipe horizontal pipe 61 is directly welded to the top frame 7 of the rainfall frame of the lifting partition rainfall device, as Figure 1 shown. Among them, the sedimentation tank return water pump 59 selects a commonly used pipeline pump, which is composed of a pump body 66, a pump mechanical seal 67, a pump shaft carrier 68, a shaft coupling 69, a pump base 70, a bearing 71, a rotor 72, and a pump impeller 73, which helps to improve the efficiency and effect of return water. The pipeline pump is a commercially available component in the prior art, so the connection relationship between the components will not be described in detail.

[0056] The operation steps of the test instrument of the present invention are as follows:

[0057] The first step: Adjustment of the height of the device of the present invention

[0058] Precisely place the lifting partition rainfall device 3 on the lifting filtration device 5. According to the actual height parameters of the lifting partition rainfall device 3, use the height adjustment device of the lifting filtration device 5 to accurately adjust its height to ensure that the lifting partition rainfall device 3 is in a suitable simulated position.

[0059] Step 2: Setting and starting rainfall simulation parameters

[0060] Based on the actual engineering background requirements, use the electronic control system to accurately set key parameters such as wind speed, wind direction, rainfall amount, raindrop diameter, rainfall range, rainwater composition, and rainwater pH value. After completing the parameter settings, start the rainfall simulation system to begin the rainfall simulation experiment.

[0061] Step 3: Filtration and preliminary separation of substances after rainfall simulation

[0062] After a preset period of rainfall simulation, the rainwater carries relevant substances and flows into the lifting filtration device 5. The lifting filtration device 5 realizes preliminary solid-liquid separation through a two-stage filtration mechanism. Among them, solid substances are intercepted and retained on the solid retention plate 43 of the lifting filtration device 5, while the liquid is temporarily stored inside the filtration tank body 41.

[0063] Step 4: Transfer of the filtrate to the neutralization and return water device and pH detection

[0064] Open the connecting pipe bolt 47 between the lifting filtration device 5 and the neutralization and return water device 6, so that the filtrate flows into the neutralization filtration tank 46 of the neutralization and return water device 6 through the connecting pipe 45 for secondary filtration treatment. During this process, take samples of the filtrate and use professional pH detection equipment to detect its pH value.

[0065] Step 5: Acid-base neutralization according to pH and re-detection

[0066] According to the pH result obtained by detecting the neutralization filtration tank 46, selectively open the corresponding connecting pipe bolt 47. If the detection result shows acidity, open the connecting pipe leading to the acid-neutralization filter tank 64; if it is alkaline, open the connecting pipe leading to the alkali-neutralization filter tank 51. Conduct acid-base neutralization reactions at the corresponding neutralization ports. After the reaction is completed, take samples again and detect the pH of the liquid.

[0067] Step 6: Judging whether the liquid reaches neutrality and subsequent treatment

[0068] Judge whether the liquid reaches the neutrality standard by detecting the pH of the acid-neutralization filter tank 64 or the alkali-neutralization filter tank 51. If the liquid reaches neutrality, open the connecting pipe bolt 47 leading to the neutralization filtrate tank 53, introduce the liquid into the neutralization filtrate tank 53 for temporary storage, and take samples and detect the pH of the liquid in the neutralization filtrate tank 53 again to ensure that the pH of the liquid is stably within the neutral range.

[0069] Step 7: Determine whether the liquid meets the backwater standard and the utilization of backwater

[0070] Based on the pH result of the re-detection of the liquid in the neutralization and filtration tank 53, determine whether the liquid meets the backwater standard. If the liquid meets the backwater standard, open the connecting pipe bolt 47 leading to the sedimentation tank 55, introduce the liquid into the sedimentation tank 55, and carry out subsequent backwater utilization to achieve the recycling of water resources.

[0071] When the device is operating, according to different engineering backgrounds, simulation experiments can be carried out on rainfall under different pH values, different trace element contents, different rainfall amounts and raindrop diameters, as well as different wind speeds and wind directions. Through the control of the electronic system, the variables are strictly controlled.

[0072] As described above, only the specific embodiments of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

1. A rainfall device that can be raised and lowered, simulates rainfall under multiple working conditions, and achieves neutralization and return water, characterized in that: The invention comprises a lifting partition rainfall device (3), a lifting filter device (5), and a neutralization return water device (6), wherein the lifting partition rainfall device (3) is installed above the lifting filter device (5), and the neutralization return water device (6) is installed on one side of the lifting filter device (5) and its inlet end is connected to the outlet end of the lifting filter device (5), and the outlet end is connected to the water supply steel frame of the lifting partition rainfall device (3).

2. A rainfall device that can be raised and lowered, simulates rainfall under multiple working conditions, and achieves neutralization and return water according to claim 1, characterized in that: The lifting zoned rainfall device (3) comprises a rainfall rack support frame (1), a rainfall rack lifting slide shaft (4), a rainfall rack top frame (7), a rainfall nozzle group (9), a rainfall rack pulley (10), an acid rainfall reagent bottle (12), a trace element rainfall reagent bottle (13), and an alkaline rainfall reagent bottle (16); The rain rack top frame (7) is composed of a plurality of water supply steel frames, which divide the rain rack top frame (7) into a plurality of rainfall areas, each rainfall area is equipped with a group of rainfall nozzles (9), a rain rack pulley (10) is installed at the bottom of the rain rack support frame (1), the rain rack support frame (1) is fixed below the four corners of the rain rack top frame (7), a rain rack lifting slide shaft (4) is installed outside the rain rack support frame (1), and the rain rack top frame (7) is located above the rain rack support frame (1) and is slidably installed on the rain rack lifting slide shaft ( 4), an acidic rainfall reagent bottle (12), an alkaline rainfall reagent bottle (16) and a trace element reagent bottle (13) connected to its water supply steel frame are installed on the top frame (7) of the rainfall rack, the acidic rainfall reagent bottle (12) is placed on the east side of the top frame (7) of the rainfall rack, the trace element reagent bottle (13) is placed on the north side of the top frame (7) of the rainfall rack, and the alkaline rainfall reagent bottle (16) is placed on the west side of the top frame (7) of the rainfall rack. The water supply steel frame of the top frame (7) of the rainfall rack is also connected to the return water pipeline of the neutralization return water device (6).

3. A rainfall device capable of being raised and lowered, simulating rainfall under multiple working conditions and achieving neutralization and return water according to claim 2, characterized in that: A west adjustable speed fan (2), a south adjustable speed fan (8), an east adjustable speed fan (11), and a north adjustable speed fan (14) are respectively installed at the middle positions of the four sides of the rain rack top frame (7).

4. A rainfall device capable of being raised and lowered, simulating rainfall under multiple working conditions and achieving neutralization and return water according to claim 2, characterized in that: The rain nozzle group (9) comprises a rain nozzle support frame (17), a water supply pipe (18), a rain nozzle (19), an upper sealing member (20), a control connecting member (21), a lower sealing member (22), a nozzle (23), a control valve (24), and a pressure controller (25); the rain nozzle support frame (17) is connected with the water supply pipe (18) on all sides, the lower end of the water supply pipe (18) is connected with the rain nozzle (19), the lower part of the rain nozzle (19) is connected with the control connecting member (21), the lower part of the control connecting member (21) is connected with the nozzle (23), the rain nozzle (19) is equipped with a pressure controller (25), the control connecting member (21) is provided with a control valve (24), the upper sealing member (20) is installed at the connection between the rain nozzle (19) and the control connecting member (21), and the lower sealing member (22) is installed at the connection between the control connecting member (21) and the nozzle (23).

5. The rainfall device according to claim 2, which can be raised and lowered, simulates rainfall under multiple working conditions and realizes neutralization and return water, is characterized in that: The acidic rainfall reagent bottle (12), the trace element rainfall reagent bottle (13), and the alkaline rainfall reagent bottle (16) have the same structure, comprising a reagent bottle cap (26), a reagent bottle body (27), a scale line (28), a reagent bottle bottom (29), a reagent bottle outlet (30), and a reagent bottle plug (31). The transparent reagent bottle body (27) is located between the reagent bottle cap (26) and the reagent bottle bottom (29) and has a scale line (28) on its outer wall. The reagent bottle bottom (29) is provided with a reagent bottle outlet (30), and a reagent bottle plug (31) is installed at the front end of the reagent bottle outlet (30).

6. A rainfall device capable of being raised and lowered, simulating rainfall under multiple working conditions and achieving neutralization and return water according to claim 2, characterized in that: The rain rack support frame (1) is in the shape of a rectangular parallelepiped and is welded together by a support frame horizontal steel frame and a support frame vertical steel frame. Two crossed support frame horizontal steel frames are connected between the vertices of the bottom surface of the rain rack support frame (1).

7. The rainfall device according to claim 1, which can be raised and lowered, simulates rainfall under multiple working conditions and realizes neutralization and return water, is characterized in that: The lifting filter device (5) comprises a primary filter plate (40) of the filter pool, a filter pool body (41), a filter pool lifting button (42), a filter pool solid retention plate (43), and a secondary filter plate of the filter pool. The primary filter plate (40) of the filter pool is installed on the top of the filter pool body (41), and the solid retention plate (43) of the filter pool is installed on the bottom. The filter pool body (41) is provided with a lifting device, and the filter pool solid retention plate (43) is provided with a filter pool lifting button (42) connected to the lifting device. The right side wall of the filter pool lifting button (42) is provided with a filter pool outlet (44), and the filter pool outlet (44) is connected to the neutralization return water device (6). The secondary filter plate of the filter pool is installed below the primary filter plate (40) of the filter pool. The primary filter plate (40) of the filter pool and the secondary filter plate of the filter pool are both provided with pores, and the pores on the secondary filter plate of the filter pool are smaller than the pores on the primary filter plate of the filter pool.

8. The rainfall device according to claim 1, which can be raised and lowered, simulates rainfall under multiple working conditions and realizes neutralization and return water, is characterized in that: The neutralization return water device (6) comprises a neutralization filter tank (46), a neutralization alkali filter tank (51), a neutralization acid filter tank (64), a neutralization filter tank (53) and a sedimentation tank (55). The water inlet of the neutralization filter tank (46) is connected to the water outlet of the lifting filter device (5) through a connecting pipe (45). The two water outlets of the neutralization filter tank (46) are connected to the neutralization alkali filter tank (51) and the neutralization acid filter tank (64) through connecting pipes (45). 4), the water outlets of the neutralization alkali filter tank (51) and the neutralization acid filter tank (64) are connected to the neutralization filter tank (53) through connecting pipes (45), the water outlet of the neutralization filter tank (53) is connected to the bottom of the sedimentation tank (55) through connecting pipes (45), all connecting pipes (45) are installed with corresponding connecting pipe plugs (47), the outer wall of the neutralization filter tank (46) is provided with a neutralization filter tank sampling port (48), the neutralization alkali filter tank (51) A neutralization alkali filter tank sampling point (49) and a neutralization alkali filter tank sampling point (65) are respectively provided on the outer side walls of the neutralization alkali filter tank (50) and the neutralization alkali filter tank (63), respectively, and a neutralization alkali filter tank neutralization point (50) and a neutralization alkali filter tank neutralization point (63) are respectively provided on the top. A neutralization filtration tank sampling point (52) is provided on the outer side wall of the neutralization filtration tank (53). A sedimentation tank drain port (54) is provided at the bottom of the sedimentation tank (55), a sedimentation tank return port (62) is provided on the top, and a right side wall of the neutralization filtration tank (53) is provided. A sedimentation tank sampling place (56) is provided, a return water pump support frame (57) is installed inside, a sedimentation tank return water pump (59) is fixed on the return water pump support frame (57), the bottom of the return water pipe vertical pipe (60) is inserted into the sedimentation tank return water port (62) and connected to the sedimentation tank return water pump (59), the upper end of the return water pipe vertical pipe (60) is connected to the return water pipe horizontal pipe (61), and the end of the return water pipe horizontal pipe (61) is connected to the water supply steel frame of the lifting partition rainfall device (3).

9. A rainfall device capable of being raised and lowered, simulating rainfall under multiple working conditions and achieving neutralization and return water according to claim 8, characterized in that: A sedimentation tank filter plate (58) is installed above the water inlet inside the sedimentation tank (55). The sedimentation tank filter plate (58) is installed below the return pump support frame (57) and is provided with pores.

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