CN112393847A - Rain box capable of accurately controlling rainfall and test method for accurately controlling rainfall by rain box - Google Patents
Rain box capable of accurately controlling rainfall and test method for accurately controlling rainfall by rain box Download PDFInfo
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- CN112393847A CN112393847A CN202011139432.2A CN202011139432A CN112393847A CN 112393847 A CN112393847 A CN 112393847A CN 202011139432 A CN202011139432 A CN 202011139432A CN 112393847 A CN112393847 A CN 112393847A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
- B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
- B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
- B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
- B05B9/0409—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material the pumps being driven by a hydraulic or a pneumatic fluid
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Abstract
The invention discloses a rain box capable of accurately controlling rainfall and a test method for accurately controlling the rainfall by the rain box, which comprises the following steps: the test box body comprises a rain disk, a sample rotary table and a water tank in the test box body, the water tank comprises various functional holes, circulating water is adopted in a rain test, and the water path principle of the method for accurately controlling the rainfall comprises the following steps: ball valve, water pump, bypass proportional valve, flowmeter, precision filter, pressure sensor, water inlet solenoid valve, rain tray and syringe needle, liquid level floater, evacuation solenoid valve, ventilation solenoid valve, air pressure regulator. The beneficial effects of the invention include: the rainfall control method has the advantages that the PID can automatically and accurately regulate and control the rainfall; optimizing the first water replenishing time problem; after water is supplemented, the water of the water tray can be locked, and when a sample is replaced or other rainfall tests are set, the test can be directly started without supplementing water again.
Description
Technical Field
The invention relates to the field of rain test equipment, in particular to a rain box capable of accurately controlling rainfall and a test method for accurately controlling the rainfall by the rain box.
Background
The artificial rain method is used for testing the waterproof grades of IPX1 and IPX2 in the waterproof test, and also relates to the rainfall simulation by using a rain disc in the military standard rain, and the use and the storage condition of test equipment or parts in the simulated rain. No matter the test is the national standard waterproof test or the military standard rain test, the simulation test of rainfall is involved.
In the prior art, the rainfall is controlled by controlling the liquid level height in the rain tray, the corresponding relation between the height and the rainfall exists in the national standard, and how to accurately control the rainfall is not mentioned in many patents, and the waterproof test equipment or military standard rain-drenching box is only explained in structure and principle, and the waterproof test box for controlling the rainfall by using the height is also used, and the liquid level height of the water tray is controlled by using a floating ball and a pump, so that the purpose of controlling the rainfall is achieved. In waterproof test boxes IPX1 and IPX2 and military standard rain test standards, clear requirements are provided for rainfall and needle hole diameter, and the corresponding relation between the height and the rainfall is given, but the prior proposal has the following problems.
1. The floating ball is used as a sensor for controlling the liquid level height, the position of the floating ball needs to be accurately installed, if there are several kinds of rainfall, the number of the floating balls can be increased to control the height of a plurality of liquid levels, and the control complexity of equipment is increased.
2. When the liquid level height is used for controlling rainfall, the liquid level floats up and down on the target liquid level, the water pump is frequently started and stopped, the control precision is poor, and the service life of the pump is influenced.
3. When the liquid level is used for controlling rainfall, the phenomenon of uneven rainfall caused by the incomplete horizontal of the rain plate is more obvious on a military standard rain box (because the lifting of the rain plate and the height of 3m are involved). Influence factors of unevenness of a rain plate: uneven ground, limited processes, unreasonable lifting systems, etc.
4. The water replenishing pump is selected, excessive water replenishing, liquid level fluctuation and the like are easily caused due to overlarge flow, and waiting time is too long when water is replenished for the first time due to small flow.
5. The first water replenishing time is long, and even if continuous tests are carried out, or samples are replaced, the water is replenished to a specified liquid level.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the rain box capable of accurately controlling the rainfall, which automatically and accurately regulates the rainfall, has short water replenishing time and can be continuously tested for multiple times.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a but rain case of accurate control rainfall which characterized in that: comprises an experiment box body (1), wherein a rain disc (2), a sample rotary table (3) and a water tank (4) are arranged in the experiment box body (1), the rain disc (2) is arranged at the top of the experiment box body (1), the sample rotary table (3) is arranged below the rain disc (2), the water tank (4) is arranged below the sample rotary table (3), the lower part of the water tank (4) is connected to an upper water inlet of the rain disc (2) through a pipeline, a ball valve (5), a water pump (6), a flow meter (8), a precision filter (9), a pressure sensor (10) and a water inlet electromagnetic valve (11) are sequentially connected onto the pipeline, a bypass pipeline is arranged between a water outlet of the water pump (6) and the upper part of the water tank (4), a bypass proportional valve (7) is arranged on the bypass pipeline, and the rain disc (2) is of a box body structure with a sealed top, a liquid level floating ball (12) is arranged in the rain disc (2), an emptying pipeline extending out of the test box body (1) is arranged at the top of the rain disc, an emptying electromagnetic valve (13) is arranged on the emptying pipeline, the top of the rain plate (2) is also provided with a vent pipeline communicated with the outside of the experimental box body (1), the air pipe is provided with an air solenoid valve (14) and an air pressure regulator (15) in sequence, a plurality of needles (16) are arranged at the bottom of the rain plate (2), a man-machine interactive controller is arranged outside the experiment box body (1), the sample rotary table (3), the water pump (6), the pressure sensor (10), the water inlet electromagnetic valve (11), the bypass proportional valve (7), the liquid level floating ball (12), the emptying electromagnetic valve (13), the ventilation electromagnetic valve (14) and the air pressure regulator (15) are all electrically connected to the man-machine interactive controller.
Further, a water collecting tank (17) is arranged below the sample rotary table (3), and the water collecting tank (17) is communicated to the top of the water tank (4).
Further, a water filling port and a pressure relief port are arranged at the top of the water tank (4), a ball float valve is further arranged in the water tank, and the ball float valve is arranged at the water filling port.
Further, the water pump (6) is a variable frequency water pump.
The invention also aims to provide a test method for accurately controlling rainfall capacity of the rain box, which uses the rain box capable of accurately controlling the rainfall capacity and is characterized in that: the method also comprises the following steps of,
s1, water is supplemented, the man-machine interactive controller controls the bypass proportional valve (7) to be closed, the flowmeter (8) is controlled to be opened to achieve the maximum flow, the liquid level of the rain plate (2) reaches a preset position, liquid level position information is fed back through the liquid level floating ball (12), and meanwhile the emptying electromagnetic valve (13) is closed to lock water in the rain plate (2);
s2, performing a rain test, wherein a tester puts a sample on the sample rotary table (3), then sets rainfall and rainfall duration on the human-computer interactive controller, and the human-computer interactive controller automatically converts the rainfall into flow according to set parameters and controls the flowmeter (8) and the bypass proportional valve (7) to accurately adjust the rainfall;
s3, ventilating and draining, wherein after all tests are finished, the man-machine interactive controller controls the ventilating electromagnetic valve (14) to be opened, the air pressure in the rain disc (2) is adjusted through the air pressure adjuster (15), and water in the rain disc (2) is drained quickly.
Furthermore, the opening degree of the bypass proportional valve (7) is adjusted by adopting a PID (proportion integration differentiation) adjusting mode to adjust the flow.
The beneficial effects of the invention include: the rainfall control method has the advantages that the PID can automatically and accurately regulate and control the rainfall; optimizing the first water replenishing time problem; after water is supplemented, the water of the water tray can be locked, and when a sample is replaced or other rainfall tests are set, the test can be directly started without supplementing water again.
The raintank of the present invention also has the advantage that,
1. the rain plate is provided with only one liquid level floating ball, the conversion of rainfall and flow is automatically realized through control, the rainfall is accurately controlled through a flowmeter, and any rainfall is set for testing.
2. Optimize the moisturizing of first water tray, shorten the moisturizing time to the rain dish can pin water, and the moisturizing once can satisfy many times test and change the sample, as long as do not discharge the water in the rain dish.
3. The rainfall can be accurately controlled through the flowmeter, and the deviation is easy to correct during calibration.
4. And gas is introduced into the rain tray, and the ventilating battery valve is opened after the test is finished, so that water in the rain tray can be drained quickly.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.
A rain box capable of accurately controlling rainfall capacity as shown in figure 1 comprises an experiment box body 1, wherein a rain disc 2, a sample rotary table 3 and a water tank 4 are arranged in the experiment box body 1. The rain plate 2 is arranged at the top of the experiment box body 1, the sample rotary table 3 is arranged below the rain plate 2, and the rainfall range of the rain plate 2 completely covers the sample rotary table 3. The water tank 4 is disposed below the sample turntable 3, in this embodiment, a placing table is disposed in the middle of the testing box 1, the sample turntable 3 is disposed on the placing table, and the water tank 4 is disposed below the placing table. The lower part of the water tank 4 is connected to the upper water inlet of the rain disc 2 through a pipeline and is used for supplementing water into the rain disc 2. The pipeline is sequentially connected with a ball valve 5, a water pump 6, a flowmeter 8, a precision filter 9, a pressure sensor 10 and a water inlet electromagnetic valve 11. In addition, a bypass pipeline is arranged at the water outlet of the water pump 6 and the upper part of the water tank 4, and a bypass proportional valve 7 is arranged on the bypass pipeline and used for matching with the flowmeter 8 and the water pump 6 to realize accurate control of water flow. The rain plate 2 of this embodiment is a box structure with a sealed top, and a liquid level floating ball 12 is arranged in the rain plate 2 and used for feeding back the water amount in the rain plate 2. An emptying pipeline extending out of the test box body 1 is arranged at the top of the rain plate, an emptying electromagnetic valve 13 is arranged on the emptying pipeline, the emptying electromagnetic valve has the functions that when the emptying battery valve is closed, water in the rain plate 2 can be locked by negative pressure and cannot flow out, and when water is drained, the water in the rain plate can be drained quickly when the emptying electromagnetic valve is opened; the top of the rain plate 2 is also provided with a vent pipeline communicated with the outside of the experiment box body 1, the vent pipeline is sequentially provided with a vent electromagnetic valve 14 and an air pressure regulator 15, and the air pressure regulator is used for regulating air pressure in the rain plate during a rain test to ensure that rainfall is uniform and rain can be controlled to stop falling at any time. The bottom of the rain plate 2 is provided with a plurality of needles 16 for rainfall. The device is characterized in that a human-computer interactive controller is further arranged outside the experiment box body 1, and the sample rotary table 3, the water pump 6, the pressure sensor 10, the water inlet electromagnetic valve 11, the bypass proportional valve 7, the liquid level floating ball 12, the emptying electromagnetic valve 13, the ventilation electromagnetic valve 14 and the air pressure regulator 15 are all electrically connected to the human-computer interactive controller. The pressure sensor 10 and the liquid level floating ball 12 are both used for feeding back signals to the human-computer interactive controller, the pressure sensor 10 is an unnecessary component, and the pressure sensor 10 is irrelevant to accurate rainfall control and is only used for feeding back pressure values. And the man-machine interactive controller can set rainfall parameters, and the man-machine interactive controller can convert rainfall into flow according to an internal set program so as to control the sample rotary table 3, the water pump 6, the water inlet electromagnetic valve 11, the bypass proportional valve 7, the emptying electromagnetic valve 13, the ventilation electromagnetic valve 14, the air pressure regulator 15 and other parts to work.
In the embodiment, the water is recycled water, so that a water collecting tank 17 is arranged below the sample turntable 3, the water collecting tank 17 is communicated to the top of the water tank 4, and the water after the rain test can be recycled.
In this embodiment, a water filling port and a pressure relief port are arranged at the top of the water tank 4, a ball float valve is further arranged in the water tank, the ball float valve is arranged at the water filling port, and when the liquid level of the water tank 4 drops to a set position of the ball float valve after a plurality of tests, the ball float valve is opened to supply water from the water filling port to the water tank 4.
The other structures in other embodiments of the invention are the same as those in the embodiment, and the difference is that the water pump 6 is changed into a variable frequency water pump, so that the adjustment precision can be achieved by the variable frequency pump, and therefore, the bypass pipeline with the bypass proportional valve 7 can be selectively cancelled or used, namely, the bypass pipeline is cancelled and the adjustment precision can be achieved by the variable frequency pump, and if the bypass pipeline with the bypass proportional valve is reserved when the variable frequency pump is used, the better adjustment precision can be achieved.
The test method for accurately controlling the rainfall capacity of the rain box uses the rain box for accurately controlling the rainfall capacity, and the whole test is divided into three stages: a water replenishing stage, a testing stage and a ventilating and draining stage, the specific testing steps are as follows,
s1, water is supplemented, the man-machine interactive controller controls the bypass proportional valve 7 to be closed, controls the flowmeter 8 to be opened to achieve the maximum flow, opens the water inlet electromagnetic valve 11, opens the water pump 6, starts water injection, enables the liquid level of the rain plate 2 to reach a preset position, feeds back liquid level position information through the liquid level floating ball 12, controls the water inlet electromagnetic valve 11 to be closed, opens the bypass proportional valve 7, and simultaneously closes the emptying electromagnetic valve 13 to close and lock water in the rain plate 2;
s2, performing a rain test, wherein a tester puts a sample on the sample rotary table 3, the sample rotary table 3 starts to rotate, then the tester sets rainfall and rainfall duration on the human-computer interactive controller, and the human-computer interactive controller automatically converts the rainfall into flow according to set parameters and controls the flowmeter 8 and the bypass proportional valve 7 to accurately adjust the rainfall; after one test is finished, the equipment is in a state to be tested, and water is stored in the rain disc 2 to wait for the next test.
And S3, ventilating and draining, wherein after all tests are finished, the man-machine interactive controller controls the ventilating electromagnetic valve 14 to be opened, and adjusts the air pressure in the rain disc 2 through the air pressure regulator 15 to drain water in the rain disc 2 quickly.
In the above test, the opening of the bypass proportional valve 7 is adjusted by PID adjustment to adjust the flow rate, so that the flow rate can be accurately controlled.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (6)
1. The utility model provides a but rain case of accurate control rainfall which characterized in that: comprises an experiment box body (1), wherein a rain disc (2), a sample rotary table (3) and a water tank (4) are arranged in the experiment box body (1), the rain disc (2) is arranged at the top of the experiment box body (1), the sample rotary table (3) is arranged below the rain disc (2), the water tank (4) is arranged below the sample rotary table (3), the lower part of the water tank (4) is connected to an upper water inlet of the rain disc (2) through a pipeline, a ball valve (5), a water pump (6), a flow meter (8), a precision filter (9), a pressure sensor (10) and a water inlet electromagnetic valve (11) are sequentially connected onto the pipeline, a bypass pipeline is arranged between a water outlet of the water pump (6) and the upper part of the water tank (4), a bypass proportional valve (7) is arranged on the bypass pipeline, and the rain disc (2) is of a box body structure with a sealed top, a liquid level floating ball (12) is arranged in the rain disc (2), an emptying pipeline extending out of the test box body (1) is arranged at the top of the rain disc, an emptying electromagnetic valve (13) is arranged on the emptying pipeline, the top of the rain plate (2) is also provided with a vent pipeline communicated with the outside of the experimental box body (1), the air pipe is provided with an air solenoid valve (14) and an air pressure regulator (15) in sequence, a plurality of needles (16) are arranged at the bottom of the rain plate (2), a man-machine interactive controller is arranged outside the experiment box body (1), the sample rotary table (3), the water pump (6), the pressure sensor (10), the water inlet electromagnetic valve (11), the bypass proportional valve (7), the liquid level floating ball (12), the emptying electromagnetic valve (13), the ventilation electromagnetic valve (14) and the air pressure regulator (15) are all electrically connected to the man-machine interactive controller.
2. A rainbox according to claim 1, wherein the rainfall can be accurately controlled by: a water collecting tank (17) is arranged below the sample rotary table (3), and the water collecting tank (17) is communicated to the top of the water tank (4).
3. A rainbox according to claim 1, wherein the rainfall can be accurately controlled by: the water tank (4) top is provided with water filling port and pressure release mouth, still be provided with the ball-cock assembly in the water tank, the ball-cock assembly set up in water filling port department.
4. A rainbox according to claim 1, wherein the rainfall can be accurately controlled by: the water pump (6) is a variable frequency water pump.
5. A test method for accurately controlling rainfall capacity of a rain box, which uses the rain box of any one of claims 1 to 4, and is characterized in that: the method also comprises the following steps of,
s1, water is supplemented, the man-machine interactive controller controls the bypass proportional valve (7) to be closed, the flowmeter (8) is controlled to be opened to achieve the maximum flow, the liquid level of the rain plate (2) reaches a preset position, liquid level position information is fed back through the liquid level floating ball (12), and meanwhile the emptying electromagnetic valve (13) is closed to lock water in the rain plate (2);
s2, performing a rain test, wherein a tester puts a sample on the sample rotary table (3), then sets rainfall and rainfall duration on the human-computer interactive controller, and the human-computer interactive controller automatically converts the rainfall into flow according to set parameters and controls the flowmeter (8) and the bypass proportional valve (7) to accurately adjust the rainfall;
s3, ventilating and draining, wherein after all tests are finished, the man-machine interactive controller controls the ventilating electromagnetic valve (14) to be opened, the air pressure in the rain disc (2) is adjusted through the air pressure adjuster (15), and water in the rain disc (2) is drained quickly.
6. The test method for accurately controlling the rainfall capacity of the rainbox according to claim 5, wherein: and the opening degree of the bypass proportional valve (7) is adjusted by adopting a PID (proportion integration differentiation) adjusting mode to adjust the flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011139432.2A CN112393847A (en) | 2020-10-22 | 2020-10-22 | Rain box capable of accurately controlling rainfall and test method for accurately controlling rainfall by rain box |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011139432.2A CN112393847A (en) | 2020-10-22 | 2020-10-22 | Rain box capable of accurately controlling rainfall and test method for accurately controlling rainfall by rain box |
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| CN112393847A true CN112393847A (en) | 2021-02-23 |
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Citations (5)
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| CN203616658U (en) * | 2013-11-27 | 2014-05-28 | 东莞市科翔试验设备有限公司 | Closed-loop flow numerical control system based on waterproof test |
| CN205374260U (en) * | 2016-01-29 | 2016-07-06 | 芜湖赛宝信息产业技术研究院有限公司 | A but rain test device of roll adjustment |
| CN110987306A (en) * | 2019-12-23 | 2020-04-10 | 天津航天瑞莱科技有限公司 | Water supply system of rain test box of aviation equipment |
| CN111650115A (en) * | 2020-07-27 | 2020-09-11 | 内蒙古农业大学 | Device for researching rainfall factor soil erosion |
| WO2020209432A1 (en) * | 2019-04-12 | 2020-10-15 | 대한민국(행정안전부 국립재난안전연구원장) | Rainfall simulator calibration system, and rainfall simulator calibration method |
-
2020
- 2020-10-22 CN CN202011139432.2A patent/CN112393847A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203616658U (en) * | 2013-11-27 | 2014-05-28 | 东莞市科翔试验设备有限公司 | Closed-loop flow numerical control system based on waterproof test |
| CN205374260U (en) * | 2016-01-29 | 2016-07-06 | 芜湖赛宝信息产业技术研究院有限公司 | A but rain test device of roll adjustment |
| WO2020209432A1 (en) * | 2019-04-12 | 2020-10-15 | 대한민국(행정안전부 국립재난안전연구원장) | Rainfall simulator calibration system, and rainfall simulator calibration method |
| CN110987306A (en) * | 2019-12-23 | 2020-04-10 | 天津航天瑞莱科技有限公司 | Water supply system of rain test box of aviation equipment |
| CN111650115A (en) * | 2020-07-27 | 2020-09-11 | 内蒙古农业大学 | Device for researching rainfall factor soil erosion |
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Application publication date: 20210223 |