RU2123669C1 - Vane dynamic meter of liquid mass - Google Patents

Abstract

FIELD: measurement technology: petroleum chemical industry. SUBSTANCE: vane dynamic meter of liquid mass allows variation of measuring volume at temperature variation of measured liquid density due to changing the length of vanes and drum coupled to cavity of changed volume filled with homogeneous liquid and of auxiliary cover secured movably. EFFECT: enhanced reliability and accuracy of measurement. 1 dwg

Description

 The invention relates to measuring equipment and can be used, in particular, for measuring liquids in the petrochemical industry.

 A device for measuring the amount of liquid in a stream is known, comprising a housing with inlet and outlet pipes, an axis on which the drum is movably fixed, blades (see AC N 353147, MKI G 01 F 3/00, dated 09.03.71).

 However, this liquid meter does not have sufficient reliability when measuring the mass of liquid.

 Also known is a device for measuring liquid in a stream, comprising a housing with inlet and outlet pipes, complete blades that are equipped with rollers, an axle assembly with a fixed cam, intermediate covers and a drum movably fixed on the axis (see passport of a bladder liquid counter for LV fluid- 100-8 of the Livensky factory of liquid meters p. 4 - 5, the city of Livny, Orel region).

 However, this liquid mass meter has significant errors with a temperature change in its density.

 The aim of the present invention is to increase the reliability of the measurement.

 The essence of the proposed device is to change the measuring volume of the device with a temperature change in the density of the measured liquid due to the variable length of the blades and the drum connected to the cavity of the variable volume (bellows) filled with a homogeneous (given) liquid and movably fixed intermediate cover.

 The drawing shows a diagram of the proposed device.

 A vane dynamic liquid mass meter (see drawing) consists of a housing 1 with inlet and outlet pipes, upper and lower covers 2, 3, axis 4, on which a cam 5 is mounted, which is rolled by rollers 6 mounted on the blades 7. On the axis 4, it is movable fixed drum 9 with grooves for moving the blades 7 during its rotation.

 The drum 8 is located between the intermediate covers 9, 10, mounted in the housing 1. In the housing 1 is also installed liner 11.

 In addition, the blades 7 and the drum 8 are equipped with extensions 12 and 13 with mobility along the axis 4.

 A sleeve 14 is mounted on the axis 4 with mobility along it, on which the extension 13 of the drum 8 is movably fixed and the intermediate cover 10 is mounted.

 The sleeve 14 is connected to the movable part of the cavity 15 of a variable volume, fixed relative to the housing 1.

 The cavity 15 of the variable volume is filled with a homogeneous (given) or close thermal expansion liquid.

 The device operates as follows.

 The flow of the measured fluid entering the measuring chamber, enclosed between the blades 7 with the extensions 12, the drum 8 and the extensions 13, the housing 1 and the intermediate covers 9, 10 loses some of the pressure to create a torque that drives the drum 8 with the blades 7 in rotation.

 Dynamic measurement of the amount of liquid occurs due to the periodic cutting off of a portion of the liquid enclosed in the measuring chamber.

 With a temperature change in the density of the measured liquid, for example, a decrease, the mass of a portion of the liquid enclosed in the measuring chamber increases accordingly. At the same time, there will be a decrease in the volume of liquid in the cavity 15, the movable elements of which will move the sleeve 14. In turn, the sleeve 14 will move the extenders of the blades and the drum 12, 13, as well as the intermediate cover 10 in the direction of decreasing the measuring chamber. At the same time, the measurement chamber is reduced by an amount that ensures the preservation of a weight charge in it.

 With increasing temperature, all movements occur in the reverse order.

Claims (1)

 A vane dynamic liquid mass meter, comprising a housing with inlet and outlet pipes, an axis on which the drum is movably fixed, and blades, characterized in that grooves for moving the blades are made in the drum, and a cam fixedly mounted on the axis and rolled in is introduced into it rollers mounted on the blades, the upper, lower and two intermediate covers, a cavity of variable volume, an extension cord with mobility along the axis, with which the blades and the drum are provided, and the blades with extensions, a drum with an extension elem, the housing and the intermediate cap to form a measuring chamber, and the extenders blades and the drum and intermediate cover are movably mounted at change of fluid volume in the cavity of variable volume.