RU28244U1 - DEVICE FOR WEIGHT MEASUREMENT OF QUANTITY OF SUBSTANCE - Google Patents

Abstract

A device for the weight measurement of the amount of a substance, mainly a liquid, containing a measuring container with its suspension element to a rigid fixed frame, as well as a weight measuring device of a measuring container, characterized in that the weight converter is made in the form of at least two strain-sensitive elements connected in the electric circuit of the converter a bridge circuit and placed in its housing, which is equipped with upper and lower eyes, spatially oriented in mutually perpendicular planes and joints connected respectively with a return eye on a rigid fixed frame and with a response eye on a measuring tank.

Description

The utility model is the main node of the working standard, that is, a flowmeter installation for checking measuring instruments for accounting the amount of liquid by static weighing, but can also be used for weighing other, for example, loose substances.

It is a well-known technical solution (design) of the main node of a static weighted flowmeter installation 1, which contains a measuring tank under one of the trays of the distribution cross over node supplying liquid. Measuring capacity is mounted on the scales, and the scales are placed on a fixed rigid base.

Also known are electronic bunker scales 2 containing a measuring container under the neck with a shutter, which provide a cut-off of the supply of the substance weighed in the measuring container. In this case, the weighing is provided not by weights, but by three strain gauge converters (sensors) of weight built into the supporting elements between the measuring capacity and the rigid frame.

However, it should be noted that in order to ensure high accuracy and speed of the flowmeter installation as a whole, especially the reference installation, very stringent requirements are imposed on the weighing elements of static weighing, on the measured capacity and their layout, namely: - the temperature error of measurement should be excluded weight when using strain gauges in suspension of measured capacity; - should be excluded or minimized any

dynamic effects on the measured capacity both from the outside and from the inside, at the time of reading the readings. Moreover, if the substance entering the frozen container is loose, then minimizing harmful dynamic effects is less costly and quite simple, and if a liquid is supplied to the measured container, the whole process is much more complicated, since time and structural complications are required to read the weight meter readings during each measurement for the liquid to reach a state of rest, while external influences on the nodes and elements of the installation as a whole should be minimal or eliminated.

The closest technical solution (otherwise, the prototype) adopted a device 3 for weight measurement of the amount of substance containing a measuring container suspended (under the feed unit with a dose cut-off element) on a rigid fixed frame by means of three composite rods-suspensions, each equipped with an integrated converter weights with strain elements.

The disadvantages of the known object of the prototype can and should include the fact that it cannot be, without significant design refinement, used in standard flowmeter installations for calibration and (or) calibration of measuring instruments to account for the amount of liquid, since it even works on bulk solids with an error of up to 0.1%, and the aforementioned modern installation standards should have a total measurement error of 1, p.205 not worse than 0.05%.

Thus, the required technical result (in other words, the goal of creating an object as a utility model) is to provide the object with such enhanced consumer properties as the speed of obtaining information during repeated weighing of liquids, structural simplicity, reliability, accuracy and maintainability.

This goal is achieved by the fact that in the known device, according to the description of prototin containing a measuring container with an element of its suspension to a rigid fixed frame and a weight converter of the measuring container, the latter is made in the form of, as a minimum, two strain-sensing elements connected in its electric circuit via a bridge the circuit and placed in its housing, which is equipped with upper and lower gaps, spatially oriented in mutually perpendicular planes and linked, respectively, with the response eyes s hard fixed frame and on the measuring container.

The required technical result is ensured by the presence of the essential features (characterizing the proposed design of the device for weight measurement of the amount of substance) of the above distinctive features, and the non-detection of equivalent technical solutions with the same properties in the patent and technical information sources implies that the claimed object meets the criteria of the “utility model”.

Figure 1 shows a diagram of a device, figure 2 shows a diagram of a weight transducer in an element of suspension of a measured capacitance to a frame, and figure 3 shows a preferred construction of pairing the eyes of a weight transducer with response hooks on a frame and on a measured capacitance, respectively.

The device consists of (figure 1) a measuring tank 1 with an element 2 of its suspension to a rigid, unsupported frame 3 (shown conditionally). The suspension element is made integral and is equipped with a converter 4 weight measuring capacity. The latter is made in the form of two identical strain-sensing elements 5 and 6, connected in an electric circuit of a weight converter according to a bridge circuit and placed in its housing 7 so that the weight of the measured capacitance is perceived by only one of these strain-sensing elements (position 5 in FIG. 1). Building 7

the weight transducer is equipped with two eyes 8 and 9, that is, the upper and lower eyes, respectively, while they are placed in mutually perpendicular planes (otherwise, they are crisscross with one another) and connected to the holes 10 and 11, one of which is placed on the frame 3, and the other on the measured capacity 1, respectively.

The device operates as follows. The intake of a portion of the liquid for weighing is carried out by means of a distribution box (shown in figure 1, but not shown as a separate item). After the flow of liquid into the measuring tank is stopped, the weight meter reading (also shown in Fig. 1 conditionally) is read, which is provided by the strain gauges 5 and 6 and is presented in the form of an electric signal Uc, the level of which is proportional to the weight of the measuring tank with contents. After reading the weight reading, the measuring tank is emptied into the storage tank (shown conditionally) and the measurement cycle can be repeated. The bridge connection of two identical strain elements in the electrical circuit of the transducer allows to minimize the temperature component of the measurement error, and the cross-location of the eyes 8 and 9 of the weight transducer on its housing 7 (figure 2) and the presence of each of them, with the response eye of the frame and measuring tank accordingly, spherical conjugation (figure 3) provides effective damping of perturbing factors and significantly reduces the waiting time until the liquid becomes at rest.

Thus, the claimed design of the main unit of the exemplary flowmeter installation of static weighing provides gender) D1 the required technical result when implemented, meets the "criteria of a utility model and is proposed for protection by the RF security document as requested by the applicant. INFORMATION USED SOURCES

NRI DRAWING THE DESCRIPTION OF THE CREDIT FUNCTIONAL MODEL:

1.Hansz arov K.I., Zeitlin V.G. Technique for measuring pressure, flow, quantity and level of liquid, gas and steam. M., publishing house of standards, 1989, p. 199-205, fig. 86.

2. Scales bunker electronic "NOTE. Nrospect TENZO-M. 140050, M.O., Lyubertsy district, pos. Kraskovo.

3. Scales bunker electronic "SIGMA. Nrosnect TENZO-M. 140050, M.O., Lyubertsy district, nose. Kraskovo; prototype.

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Claims (1)

A device for the weight measurement of the amount of a substance, mainly a liquid, containing a measuring capacitance with an element of its suspension to a rigid fixed frame, as well as a weight transducer of a measuring capacitance, characterized in that the weight transducer is made in the form of at least two strain-sensitive elements connected in the electric circuit of the transducer a bridge circuit and placed in its housing, which is equipped with upper and lower eyes, spatially oriented in mutually perpendicular planes and joints connected respectively with a return eye on a rigid fixed frame and with a response eye on a measuring tank.