4 results about "Test chamber" patented technology

The invention relates to a system and method for evaluating the voltage-sensitive characteristic of a lightning arrester valve plate under multiple lightning strokes, and belongs to the technical field of lightning arrester performance evaluation. A lightning arrester valve plate is arranged in a test box, and two metal electrodes are arranged on the upper portion and the lower portion of the valve plate; the output end of a multi-impulse current generator is connected to a first metal electrode, and a second metal electrode is connected with the grounding device; a temperature and humidity sensor is further arranged in the test box and can measure the temperature and humidity conditions of the test; a current sensor sleeves a current injection lead to measure the amplitude of the multi-impact current and the time when the waveform of the multi-impact current reaches the maximum value; two input ends of a high-voltage probe are respectively connected with the first metal electrode and the second metal electrode to measure the overvoltage amplitude of the lightning arrester valve plate; and in combination with the measured data, a voltage-sensitive characteristic evaluation factor of the lightning arrester valve plate is calculated, and the voltage-sensitive characteristic of the lightning arrester is evaluted. According to the invention, accurate control of multi-impulse current waveforms is realized, and the accuracy of voltage-sensitive characteristic evaluation of the lightning arrester valve plate under the action of multiple lightning strokes is improved.

The invention provides a test method for comprehensively simulating rubber blooming. The test method provided by the invention comprises the steps that two identical constant temperature and humiditychambers are normally turned on; one chamber is a high temperature test chamber, and the test conditions are set to the constant temperature of 60 DEG C to 100 DEG C and the constant humidity 70% to 100%; the other chamber is a low temperature test chamber, and the test conditions are set to the constant temperature 0 DEG C ~ 15 DEG C and the constant humidity 70% to 100%; stabilizing is for halfan hour after the test conditions are reached; ten vulcanized test pieces of the same batch with the same vulcanization condition are taken, wherein the vulcanized test pieces are of the same sizing material, and length*width*height is100mm*100mm*2mm; five pieces are suspended in the high temperature test chamber, and the remaining five pieces are suspended in the low temperature test chamber; continuous testing is carried out for 24 hours to 168 hours; observing is carried out every 24 hours, and the surface conditions of the test pieces are recorded; and rating is carried out according to the recorded conditions. The test method can fully and accurately characterize comprehensive the rubber blooming performance without consuming too much time and cost.

The invention provides a test device for rapidly evaluating atmospheric wind stress corrosion and a test method of the test device. The test device comprises a test box body, an atmosphere cavity assembly is arranged in the test box body, the atmosphere cavity assembly is respectively connected with a temperature and humidity control module and a wind flow control module, and one side of the atmosphere cavity assembly is provided with a sample bracket. The device is small in size and convenient to move and assemble, and the flow velocity of air flow can be adjusted at will; meanwhile, two windand air flow generation modes can be adopted, namely point-shaped wind and air flow and line-shaped wind and air flow, so that the problem that only a single point-shaped wind and air flow impact effect is generated is solved; in addition, the device is provided with a sample bracket with a rotatable angle, so that the problem of evaluating the wind stress erosion effect at different angles can be solved.