CN207717319U - The experimental rig of anti-solid stream of water impact - Google Patents

Abstract

The utility model relates to a test device for preventing the impact of continuous water flow, which is characterized in that it includes a water tank, a pump group mechanism, a water gun and a nozzle connected sequentially through pipelines, an electric heating wire is arranged at the bottom of the water tank, and a A ball valve, an agitator and a temperature sensor are installed in the water tank, the signal output end of the temperature sensor is connected to the temperature controller, the signal input end of the temperature controller is connected to the ball valve and the electric heating wire, and the pump unit mechanism is connected to the high-pressure pipeline through the pressure regulating valve Connection, the end of the high-pressure pipeline is connected with the water gun and the nozzle, beneficial effect: the utility model fills up the environmental conditions of the airborne equipment in the aircraft industry and the equipment gap in the test. The test device of the utility model can be provided with different test water temperatures, different water spray heights, and nozzles with different diameters can be replaced, so as to realize the anti-continuous water flow impact test of products installed on the surface of the aircraft under different test conditions. The test device has the advantages of low cost, simple structure, convenient replacement, high versatility and wide application range.

Description

Test device against continuous water shock

technical field

The utility model belongs to the field of environmental tests, in particular to a test device for preventing the impact of continuous water flow.

Background technique

Products installed on the surface of aircraft, such as antennas, will encounter the strong impact of water jets during aircraft deicing, washing or cleaning operations. Therefore, in order to assess whether the installed products meet the specified requirements, the factory will conduct anti-continuous water flow tests on the products installed on the surface of the aircraft in accordance with RCTA DO-160F "Airborne Equipment Environmental Conditions and Tests" and other standards.

At present, there are few special equipment for this assessment test, which are basically replaced by machines and equipment for other purposes. The experimental results are not satisfactory, and the price is relatively high. Spacecraft factories urgently need to develop an anti-continuous water flow test device with simple structure, convenient replacement, high versatility and low cost.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the above-mentioned technologies, and provide a test device for preventing the impact of continuous water flow, setting different test water temperatures, different spray heights and changing nozzles with different diameters, which can realize different test conditions. Anti-continuous water impact test.

In order to achieve the above object, the utility model adopts the following technical solutions: a test device for preventing the impact of continuous water flow, which is characterized in that: it includes a water tank, a pump unit mechanism, a water gun and a nozzle connected in sequence through pipelines, and an electrical outlet is arranged at the bottom of the water tank Heating wire, a ball valve is arranged above the water tank, an agitator and a temperature sensor are arranged in the water tank, the signal output end of the temperature sensor is connected to the temperature controller, the signal input end of the temperature controller is connected to the ball valve and the electric heating wire, the pump set The mechanism is connected to the high-pressure pipeline through the pressure regulating valve, and the end of the high-pressure pipeline is connected to the water gun and the nozzle.

The pump group mechanism includes a water pump, a motor and a filter connected in sequence, the water outlet of the pump group mechanism is connected with a pressure gauge, and the signal output end of the pressure gauge is connected with a water spray height controller and a liquid quantitative controller in sequence, and the liquid quantitative controller The water inlet of the pressure gauge is connected with the water outlet of the pump mechanism through the pipeline, the water outlet of the liquid quantitative controller is connected with the water tank through the return pipeline, and the water inlet of the pressure gauge is connected with the water gun and the nozzle through the high-pressure pipeline.

An overflow valve is arranged above the water tank.

The liquid quantitative controller includes an electric flow regulating valve and a programmable controller, compares the target pressure value calculated by the spray height controller with the feedback value of the pressure gauge obtained from the actual test, and adjusts the opening of the regulating valve according to the difference Size to achieve the specified pressure at the nozzle and return excess water to the tank through the return line.

The water spray height controller calculates the outlet water pressure according to the parameters of the inner diameter of the nozzle and the water spray height.

A dust-proof cover is arranged above the water tank, and one side of the dust-proof cover is connected to the side of the water tank through a hinge.

The agitator is fixed on the bottom of the heating wire in the water tank, and the agitator adopts a propeller type agitator.

The ball valve adopts a float type ball valve.

Beneficial effects: compared with the prior art, the utility model fills up the equipment gap in the environmental conditions and tests of airborne equipment in the aircraft industry. The test device of the utility model can be set with different test water temperatures, different water spray heights, and nozzles with different diameters can be replaced, so as to realize the anti-continuous water flow impact test of products installed on the surface of the aircraft under different test conditions. The test device has the advantages of low cost, simple structure, convenient replacement, high versatility and wide application range.

Description of drawings

Fig. 1 is a structural connection block diagram of the present utility model;

Fig. 2 is a schematic structural view of the pump unit mechanism in Fig. 1;

Fig. 3 is a schematic structural view of the water gun and the nozzle in Fig. 1 .

Fig. 4 is an outline view of the spray head in Fig. 1 .

Fig. 5 is a schematic composition diagram of the liquid quantitative controller in Fig. 1 .

In the figure: 1. water tank, 2. pump mechanism, 2-1, water pump, 2-2, motor, 2-3, filter, 3. water gun and nozzle, 3-1, water gun switch, 3-2, nozzle , 4. Electric heating wire, 5. Ball valve, 6. Agitator, 7. Temperature sensor, 8. Temperature controller, 9. High pressure pipe, 10. Overflow valve, 11. Dust cover, 12. Spray height control Device, 13, liquid quantitative controller, 13-1, electric flow regulating valve, 13-2, programmable logic controller, 14, pipeline, 15, pressure gauge.

Detailed ways

The specific implementation of the utility model will be described in detail below in conjunction with the preferred embodiments.

Referring to the accompanying drawings for details, this embodiment provides a test device for preventing the impact of continuous water flow, including a water tank 1, a pump unit mechanism 2, a water gun and a nozzle 3 connected in sequence through a pipeline 14, and an electric heating wire 4 is arranged at the bottom of the water tank , the top of the water tank is provided with a ball valve 5, the water tank is provided with an agitator 6 and a temperature sensor 7, the signal output end of the temperature sensor is connected with the temperature controller 8, and the signal input end of the temperature controller is connected with the ball valve and the electric heating wire. An overflow valve 10 is provided above the water tank. Described water tank top is provided with dustproof cover 11, and one side of dustproof cover joins with water tank limit by hinge.

See accompanying drawing 5 for details, described liquid quantitative controller 13 comprises electric flow regulating valve 13-1 and programmable logic controller PLC13-2, according to the target pressure value calculated by water spray height controller and the pressure gauge feedback obtained by actual test Values are compared, and the opening of the regulating valve is adjusted according to the difference to achieve the specified pressure value at the nozzle and the excess water is returned to the water tank through the return pipe. Described agitator 6 adopts propeller type agitator, and agitator is positioned at the bottom of water tank and is connected with water tank.

See attached drawings 3-4 for details. The nozzle is composed of an outer hexagonal stud and a stud with an external thread. The center of the nozzle is drilled with an inner through hole of a corresponding size as required. The inner diameter of the nozzle is 4mm, between -10mm. The upper end of the nozzle is printed with a mark of the diameter of the inner hole. One end of the water gun is connected to the high-pressure pipeline 9, and the other end is connected to the shower head 3-2, and is threaded at the gun head and the shower head. , the water gun is provided with a water gun switch 3-1 and a shower nozzle 3-2.

The ball valve adopts a floating ball valve, which is a metal ball device with a lever and a hollow. The metal ball floats on the water level to display the current water level in the tank, and the lever at the other end is connected to the switch.

The preferred solution of this embodiment is that the pump unit mechanism includes a water pump 2-1, a motor 2-2 and a filter 2-3 connected in sequence, the water outlet of the pump unit mechanism is connected with a pressure gauge 11, and the signal output end of the pressure gauge The water spray height controller 12 and the liquid quantitative controller 13 are connected in turn, the water inlet of the liquid quantitative controller is connected with the water outlet of the pump mechanism through the pipeline, the water outlet of the liquid quantitative controller is connected with the water tank through the return pipeline, and the pressure The water inlet of table is connected with water gun and shower nozzle 3 by high-pressure pipeline 9. Input the target value in the temperature control module according to the temperature required by the test conditions, and the programmable logic controller (PLC) in the temperature control module adjusts the output power of the heating wire according to the water temperature in the water tank obtained by the temperature sensor test.

work process

Taking the test of the antenna installed on the outer surface of the aircraft as an example, according to the test standards such as RCTA DO-160F "Environmental Conditions and Tests for Airborne Equipment", the antenna is required to be able to spray nozzles with an inner diameter of 6.4mm and a vertical water flow of not less than Under the impact of a continuous water flow at a distance of 1m from a device of 6m and a water temperature of 50°C, there will be no structural damage and appearance change.

1. Open the lid of the water tank;

2. Fill the water tank with water and put the dust cover on the water tank;

3. Install the nozzle with an inner diameter of 6.4mm on the outer end of the water gun;

4. Turn on the system power and set the target water temperature on the temperature controller to 50°C;

5. Set the predetermined spray height on the spray height controller to 6m;

6. The agitator starts to work when it is powered on, and the water in the tank starts to circulate;

7. After the temperature in the water tank reaches the set value, the temperature controller cuts off the power supply of the electric heating wire to stop heating;

8. After pressing the spray gun switch 3-1 on the high-pressure pipeline, a continuous water flow is injected through the spray nozzle 3.

9. The liquid quantitative controller automatically adjusts the opening of the electric flow regulating valve according to the pressure value fed back by the pressure gauge to return the excess water to the water tank.

10. After the continuous water impact test is over, release the switch of the spray gun and turn off the power of the whole device.

working principle

Liquid quantitative control principle:

The power drive device in the pump mechanism performs a process of absorbing and draining the water in the water tank, and the discharged water forms low-flow high-pressure water through power drive. The high-pressure water is then sent to the booster pump in the pump unit mechanism, and then enters the high-pressure water pipe after the pressurization process. Because the small inner diameter and the outer end of the nozzle are connected to normal pressure, the high-pressure and low-velocity water in the high-pressure water pipe is transformed into a low-pressure and high-velocity water jet. When different water spray heights are required, the water spray height controller calculates the required nozzle pressure according to the required height and nozzle diameter, and the liquid quantitative controller compares the pressure value fed back by the pressure gauge with the target required pressure value. When the pressure value of the spray book is higher than the target pressure value, the opening of the electric flow regulating valve becomes larger so that the excess water flows back into the water tank and the pressure at the nozzle decreases until the required pressure value is reached.

The working principle of the ball valve: the ball valve is a metal ball device with a lever and a hollow, the metal ball floats on the water level to display the current water level in the tank, and the lever at the other end is connected to the switch. Since when the water level in the water tank is lower than the minimum level of the heating wire, the heating wire will be directly exposed to the air and dry burning may occur. Therefore, when the metal ball of the ball valve drops to the minimum water level with the water level, a feedback is required to the control system. . After the control system receives the feedback signal, it cuts off the power supply of the system to avoid potential safety hazards caused by dry heating.

The principle of temperature control: Input the target value in the temperature control module according to the temperature required by the test conditions, and the programmable logic controller (PLC) in the temperature control module adjusts the output power of the heating wire according to the water temperature in the water tank obtained by the temperature sensor test . If the difference between the actual water temperature and the target water temperature is large, the output power of the heating wire will be adjusted to the maximum. If the difference in water temperature is small, the input power of the heating wire will be reduced, and the input of the heating wire will be turned off when the target water temperature is reached. If the test time is long and the water in the heated box is naturally cooled to the target temperature, the PLC will restart the output of the heating wire according to the temperature difference.

The principle of the propeller agitator is to prevent the temperature difference between the water around the heating wire and the water far away from the heating wire. During the pumping process, the propeller agitator is activated to allow the water in the entire water tank to flow and increase heat exchange. Reach the water temperature in the whole water tank at the same level.

The detailed description of the above-mentioned test device for preventing the impact of continuous water flow with reference to the embodiments is illustrative rather than restrictive, and several embodiments can be listed according to the limited scope, so without departing from the generality of the present utility model Changes and modifications under the concept should fall within the protection scope of the present utility model.

Claims (8)

1. A test device for preventing the impact of continuous water flow is characterized in that: it comprises a water tank, a pump group mechanism, a water gun and a shower nozzle connected in sequence by pipelines, an electric heating wire is arranged at the bottom of the water tank, a ball valve is arranged at the top of the water tank, and the water tank There is a stirrer and a temperature sensor inside, the signal output end of the temperature sensor is connected to the temperature controller, the signal input end of the temperature controller is connected to the ball valve and the electric heating wire, the pump unit mechanism is connected to the high-pressure pipeline through the pressure regulating valve, and the high-pressure The end of pipeline is connected with water gun and shower head. 2. The test device for preventing the impact of continuous water flow according to claim 1, characterized in that: the pump group mechanism includes water pumps, motors and filters connected in sequence, and the water outlet of the pump group mechanism is connected with a pressure gauge, and the pressure gauge's The signal output end is connected to the water spray height controller and the liquid quantitative controller in turn. The water inlet of the liquid quantitative controller is connected to the water outlet of the pump mechanism through the pipeline, and the water outlet of the liquid quantitative controller is connected to the water tank through the return pipeline. The water inlet of the pressure gauge is connected with the water gun and the nozzle through the high-pressure pipeline. 3. The test device for preventing the impact of continuous water flow according to claim 1, characterized in that: an overflow valve is arranged above the water tank. 4. The test device for preventing the impact of continuous water flow according to claim 2, characterized in that: the liquid quantitative controller includes an electric flow regulating valve and a programmable controller, and the target pressure value calculated according to the spray height controller Compared with the feedback value of the pressure gauge obtained from the actual test, adjust the opening of the regulating valve according to the difference to achieve the specified pressure value at the nozzle and return the excess water to the water tank through the return pipe. 5. The test device for preventing the impact of continuous water flow according to claim 2, characterized in that: said water spray height controller calculates the outlet water pressure according to the parameters of the inner diameter of the nozzle and the water spray height. 6. The test device for preventing the impact of continuous water flow according to claim 1, characterized in that: a dust cover is arranged above the water tank, and one side of the dust cover is connected to the side of the water tank through a hinge. 7. The test device for preventing the impact of continuous water flow according to claim 1, characterized in that: the agitator is fixed at the bottom of the heating wire in the water tank, and the agitator is a propeller type agitator. 8. The test device for preventing the impact of continuous water flow according to claim 1, characterized in that: said ball valve adopts a float type ball valve.