RU45183U1 - INSTALLATION FOR TESTING MEASURES FOR WEIGHT OR VOLUME - Google Patents

Abstract

The utility model relates to measuring technique and can be used for metrological support of propane-butane tempering technologies for acceptance and tempering at gas stations. The purpose of creating a utility model is to simplify the design, to obtain the possibility of using the installation directly at the place of work of measuring instruments. A setup for checking mass measuring instruments is proposed, which includes a secondary device that collects and mathematically processes information from weight sensors, a volumetric device that measures the amount of fluid received through a calibrated device, mounted on a tripod, weighed using weight sensors. As a volumetric device, an exemplary measuring device of the 2nd category is used. The inlet and outlet pipelines are not part of the installation; for the product to pass through the device to be verified, the dispensing valve is connected via a “dry connector” to the inlet of the measuring unit and disconnected at the end of the product receipt. Figure 1 presents the installation diagram of the verification volumetric-mass.

Volumetric calibration unit consists of a measuring device of 2 categories with a capacity of 25 liters, weighed by means of a tensometric weighing system. Mernik 1 is mounted on a tripod 3, and suspended on a strain gauge 2, has filler, drain and purge fittings. The design of the installation has several advantages: the installation allows you to verify the measuring instruments directly at the place of work of the latter, allows you to verify both volumetric and mass methods and determine the value of the actual density at the current temperature.

Description

The utility model relates to measuring technique and can be used for metrological support of propane-butane tempering technologies for acceptance and tempering at gas stations.

Volumetric and mass flowmeter installations are known (Khansuvarov KI, Tseytlin VG Technique for measuring pressure, flow rate, quantity and level of liquid, gas and steam. -M.: Standards Publishing House, 1990., pp. 199-203). However, the known devices allow you to verify the measurement method in only one of the ways -volume or mass.

Known weight consumable tank (AS USSR No. 52080, class MKI G 01 F 25/00), containing elastic inlet and outlet pipelines, on the one hand, mounted on a fixed base, and a force transducer. Elastic inlet and outlet pipelines, on the other hand, are limited by a traverse with levers, on one of which a weight supply tank is located, and on the other, it is electrically connected to the force transducer.

A weighted consumable device is known (USSR AS No. 669208, class MKI G 01 G 17/04, G 01 F 25/00) containing outlet and inlet pipelines, on the one hand, mounted on a stand of a fixed base and bounded on the other side with a traverse with levers, on one of which a weighing supply tank is located, and the other lever is electrically connected with a force sensor and a calibration device. The weighing consumable is equipped with a stand on a fixed base and with elastic inlet and outlet pipelines mounted symmetrically on the traverse to the main pipelines. The traverse arm with a weighing supply tank is equipped with a counterweight and a damper.

The disadvantages of these inventions is the complexity of the designs and the ability to use these devices only in a stationary state.

A setup for checking mass measuring instruments is proposed, which includes a secondary device that collects and mathematically processes information from weight sensors, a volumetric device that measures the amount of fluid received through a calibrated device, mounted on a tripod, weighed using weight sensors.

As a volumetric device, an exemplary measuring device of the 2nd category is used.

The inlet and outlet pipelines do not go into the installation; for the product to pass through the device to be verified, the dispensing valve is connected via a “dry connector” to the inlet of the measuring unit and disconnected at the end of the product receipt.

The purpose of creating a utility model is to simplify the design, to obtain the possibility of using the installation directly at the place of work of measuring instruments.

The technical result is achieved as follows: the installation allows you to verify the measuring instruments directly at the place of work of the latter, allows you to verify both volumetric and mass methods and determine the value of the actual density at the current temperature.

Figure 1 presents the installation diagram of the verification volumetric-mass.

Volumetric calibration unit consists of a measuring device of 2 categories with a capacity of 25 liters, weighed by means of a tensometric weighing system.

Mernik 1 is mounted on a tripod 3, and suspended on a strain gauge 2, has a filler, drain and purge

fittings. It is calibrated in volume according to an exemplary measuring device of the 1st category with drinking water at a temperature of 20 ± 1 ° C with an error not exceeding ± 0.1%.

To measure the mass of liquefied gas, the calibration of the installation is carried out with standard weights of 3 categories according to the following procedure:

1. An empty measuring device is weighed by a strain gauge and the readings of the secondary device 4 are reset.

2. Mernik is loaded with model weights of 3 categories with a maximum mass of at least 20 kg. The readings of the secondary device are recorded. Further, the measuring device is loaded with a mass of at least 11 kg, the readings of the secondary device are recorded.

3. The obtained range of readings of the secondary device is divided by the difference and the division price of the secondary device in kg is determined. The midpoint of the range 12, 13, 14, 15 kg is checked. By loading to the indicated sizes of the measuring device with standard weights the readings of the device are compared with the actual weight. The error of this adjustment consists of a tolerance on the weight of model weights of 3 categories and an accuracy of the strain gauge ± 0.02%.

Calibration of means for measuring mass or volume using the installation is as follows:

- the dose of the released liquefied gas is set;

- the weight of the empty measuring device is checked, then the readings of the secondary device are reset;

- the distributing crane is connected to the jellied union of the measuring device;

- the set dose is released into the measuring device.

- the tap is disconnected, (the connection of the dispensing tap is carried out using a special device

“Dry connector”, which ensures minimal loss of product);

- determines the actual volume of product received in the measuring device on a scale of -V _f ;

- determines the actual weight of the product according to the testimony of the secondary device -M _f ;

- the dosing error is determined. Liquefied gas is delivered to gas stations by automobile tanks (gas carriers), which are filled at gas storages, where, as a rule, gas is recorded in units of mass. Most gas stations at gas stations produce gas in units of volume, which is very difficult to convert into mass units, because the density of the propane-butane mixture varies with temperature and the concentration of propane in the mixture. The proposed installation allows you to determine the actual density of the product at the current temperature and to avoid losses during the release of liquefied gas at gas stations.

Claims (1)

Testing device, designed for checking volume or mass measuring instruments, consisting of a volumetric device that measures the amount of liquid leaking through the device, suspended on a tripod through a strain gauge weight sensor; a secondary device that collects and mathematically processes information from weight sensors, characterized in that an exemplary measuring device of the 2nd category is used as a volumetric device, having in its composition inlet and purge fittings, and the inlet fitting is equipped with a “dry connector” device for connection of supply pipelines and supply of the product being verified.