Automatic control type variable-frequency hydrostatic-pressure-proof tester

Abstract

The invention discloses an automatic control type variable-frequency hydrostatic-pressure-proof tester which can be used for solving the problems of the existing hydrostatic-pressure-proof tester that the function is single, the measurement accuracy is not high, and the ascending speed of a water container cannot be adjusted and the like. The automatic control type variable-frequency hydrostatic-pressure-proof tester comprises a support box; the support box is internally provided with a motor and a speed reducer; a stand column, a scale and a sample clamp are arranged on the upper surface of the support box; the output end of the speed reducer and the top end of the stand column are respectively fixedly connected with a first chain wheel and a second chain wheel which are matched with each other; the first chain wheel and the second chain wheel are engaged with a transmission chain and the transmission chain is fixedly connected with a water tank; the scale is fixedly connected with a glass tube, and the water tank and the glass tube are communicated with the sample clamp; the support box is provided with an ascending button and a descending button which are respectively used for controlling the transmission chain to be ascended and descended; and the support box is further equipped with a frequency converter which is respectively connected with the motor, the ascending button and the descending button. The automatic control type variable-frequency hydrostatic-pressure-proof tester has the advantages of reasonable design, simple structure and electric lines, comprehensive functions, high measurement accuracy, adjustable ascending speed of a water container, and capability of greatly enlarging the measurement range.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to a self-controlled frequency conversion hydrostatic pressure tester. Background technique [0002] Water resistance (water resistance) is the minimum pressure head required for water to penetrate through the air filter paper under a certain pressure, in Pa or mmH 2 O means that it is an important indicator of high-efficiency air filter paper, and the water resistance of the filter paper directly affects the protection performance of the filter tank. The waterproof performance is measured by measuring the static pressure height difference maintained by the test sample before water penetration. One side of the test sample is tightly clamped with a clamp, and the other side is exposed to the water pressure that increases at a constant speed. The water column height required for penetration (displayed according to the indicator paper) is the water resistance of the sa...

AI Technical Summary

Problems solved by technology

[0003] The existing anti-clean water pressure tester is a product of the 1990s. Two AC contactors are used to control the positive and negative rotation of the motor to control the rise and fall of the water container. The rising speed of the water container cannot be adjusted. And because the rising speed of the water container is relatively fast, the growth rate of the water pressure is also relatively fast, so it can only be used to measure the water pressure resistance of waterproof fabrics, but not the water pressure resistance of high-efficiency filter paper. The function is relatively single, and the measurement accuracy is not high

In addition, since the speed of the motor and the reduction ratio of the reducer are constant, in order to meet the requirements of the pressurization speed of the waterproof fabric sample in GB4744-84 "Measurement Method for Water Resistance of Textile Fabrics by Hydrostatic Pressure Test Method", it is necessary to hold The rising speed of the water container must meet the specified requirements, and this requirement can only be achieved by changing the diameter of the driving wheel on the motor and the driven wheel on the reducer.

However, the mutual matching dimensions of these two diameters need repeated trial and error processing to complete, which is time-consuming and labor-intensive

And long-term use will produce measurement errors due to wear and tear. If the error exceeds the specified requirements, you have to stop using it, which will bring inconvenience to the normal detection work.

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