Spray device with graded controllable flow rate for rain test on railway vehicle

Abstract

The invention discloses a spray device with the graded controllable flow rate for a rain test on a railway vehicle, and relates to the technical field of tests on overall sealing performance of a railway vehicle. The spray device includes multiple rows of gantry type thick water pipes, multiple rows of gantry type thin water pipes, multiple nozzles, a water inlet pipe, and multiple manual valves and a water pump with a flow rate range covering test requirements on all vehicle models. The spray device of the invention can divide the rain flow rate into two grades for control to ensure that an appropriate flow rate range can be selected according to the flow rate standard for each vehicle model test, the rain flow rate meets the rainfall requirement of the corresponding large or small size of each spray test level project contract, the practicality and rationality of the rain test are ensured, the specified flow rates are truly used for the tests of vehicles of different models, and thepurpose of accurately verifying the waterproof and leakproof performance of the vehicle surface is achieved. The water pipes and all the nozzles in the spray device of the invention are connected in athree-way movable joint manner and can be disassembled to facilitate the cleaning of sundries and maintenance.

Description

technical field [0001] The invention relates to the technical field of rail passenger vehicle airtightness tests, in particular to a spray device with graded and controllable flow for a rail passenger car rain test. Background technique [0002] At present, in the manufacturing process of rail cars, each car needs to pass the rain test test, and the rain flow standards of different models are not exactly the same. The flow rate of the existing shower room depends on the power of the pump motor used. The flow rate under the rated pressure of 2 kg is a fixed value. The total flow range of a single vehicle can only be controlled between 4000-8000L / min, which cannot be applied to all projects. For single vehicles The total flow rate of the rain test is required to be between 600-4000L / min, which is not universal for the project models with small flow requirements. When the current large-flow water pump is used to conduct rain tests on models with small flow requirements, if the...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the flow rate of the nozzles in the existing rain test room cannot be adjusted to the low target value required by the test, when the rain test is carried out on vehicles with small flow requirements, the top of the car body will cause the air conditioner to soak and overflow due to the large water spray flow. As well as the technical problem that the rain flow rat

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