Weighing apparatus intelligent calibrator

Abstract

The invention discloses a weighing apparatus intelligent calibrator which includes a base, a pit on the base for holding a weighing apparatus, and a calibration unit on the top of the base. The calibration unit includes a support column vertical to the top of the base, a lever hinged to the top of the support column, a vertically downward force-transferring column fixedly connected to the end of the lever close to the weighing apparatus, and a pressure sensor fixedly and horizontally disposed at the bottom of the other end of the lever. A hydraulic cylinder is disposed right under the other end of the lever when the lever is arranged horizontally. The distance from the hinge joint of the support column and the lever to the pressure sensor is greater than the distance from the hinge joint of the support column and the lever to the force-transferring column. The weighing apparatus intelligent calibrator applies force to the weighing apparatus from the outside, solves a problem that a traditional calibrator is directly pressed on the weighing apparatus and affects the accuracy of a calibration result, achieves a purpose of accomplishing a great task with little effort by using the unequal-arm level, reduces the bearing capacity of the pressure sensor of the calibrator, and is prolonged in the service life. Further, the bottom of the level is designed to be in a latticed shape suchthat the tension and pressure of the lever is increased.

Description

technical field [0001] The invention relates to the technical field of weighing apparatus verification equipment. More specifically, the present invention relates to an intelligent calibration instrument for weighing instruments. Background technique [0002] Scales are widely used in industry, agriculture, commerce, scientific research, medical and health and other departments. Weighing instruments use Hooke's law or the principle of lever balance of forces to determine the mass of an object. Large-scale weighing instruments refer to weighing instruments with a maximum weighing of tens of tons or more. Electronic truck scales must be calibrated before they are actually put into use to determine their accuracy level. Verification, to confirm its accuracy level, so as to make corresponding adjustments to meet the accuracy requirements. The traditional large-scale weighing instrument verification is to use a large number of 20kg weights, and use the method of manual handling...

AI Technical Summary

Problems solved by technology

The electronic truck scale is commonly known as the ground scale, which is one of the large weighing instruments. With the rapid development of the economy and the progress of weighing instrument manufacturing technology, the range of the electronic truck scale is getting larger and larger. 50-200t electronic truck scales have been widely used. For There are a series of problems in the verification of electronic truck scales with a large range, and the use of physical weights as a standard device can no longer meet the verification requirements of large-range scales

[0003] The current national law stipulates that the mandatory verification of weighing instruments is based on JJG539-2016 "Verification Regulations for Digital Indicating Scales" and JJG1118-2015 "Verification Regulations for Electronic Truck Scale (Weighing Apparatus Load Measuring Instrument Method)", according to JJG539-2016 "Digital Indicator Scale The Verification Regulations stipulate that the standard weight of a weighing instrument should be at least one-fifth to one-half of the maximum capacity of the weighing instrument. For example, a 100-ton weighing instrument needs at least 20-50 tons of standard weight. There are big problems: one is Increase the labor intensity of the verification work and increase the cost of the user unit; second, reduce the work efficiency of the verification work, wasting a lot of time for the verification unit; third, increase the safety problems in the weight transportation process, which brings hidden dangers to people's lives and property ; According to JJG1118-2015 "Electronic Truck Scale (Weighing Apparatus Load Measuring Instrument Method) Verification Regulations", although the problem of using large weights is solved, the labor intensity of the verification is reduced, and the accuracy and efficiency of the verification are improved, but because it will The verification standard load unit is directly loaded on the scale, while the verification load unit moves tens of tons, which affects the accuracy and safety of the verification from beginning to end.

[0004] The patent number is CN102538936, and the invention patent titled "A Verification Device for a Large Scale" discloses an illegal pattern verification device, but its pressure sensor is directly installed on the scale, and the data of the pressure sensor is not directly equivalent to that of the scale. Calibration data should also consider the influence of the pressure sensor's own weight. At the same time, because the pressure sensor is directly installed on the weighing instrument, the pressure that the pressure sensor should bear is quite high, and the high-pressure work seriously reduces and affects the life of the calibrator.

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