CN2237836Y - Short-travel linearing graduation float flowmeter - Google Patents

Abstract

The utility model relates to a short-travel linear graduation float flowmeter. The utility model comprises a sensor 1 and an indicator 2 which are vertically installed together in space. A float 8 which is provided with a column magnet 9, a hole plate 7 and a float device are arranged in a straight measuring tube 6 of the sensor; the upper part of the measuring tube 6 is provided with a float limitator 4. The indicator 2 is composed of a plate shaft of a cam 16 which is provided with a circular magnet 17 and a cam plate 29, an indicating needle shaft which is provided with an indicating needle 27 and a connecting rod 23, etc. The rolling wheel 22 on the connecting rod 23 is engaged with the curve of the cam plate 29. The utility model has the advantages of short and straight measuring tube and convenient processing, and the instructing graduation is in a linear relation.

Description

Short stroke linear graduation suspended body flowmeter

The utility model relates to flowmeter, especially a kind of short stroke linear graduation suspended body flowmeter.

In thermal technology, chemical engineering industry produced, the same with temperature, pressure, thing position, instantaneous delivery was to need the important parameter controlling and regulate in the fluid media (medium) technological process, in order to keep in balance stable production and guarantee product quality.The present flowmeter that uses, the difference of pressing measuring mechanism is divided differential pressure flowmeter, float type flow meter, volumeter, momentum flowmeter etc., and most popular is differential pressure flowmeter and float type flow meter.The differential pressure flowmeter primary structure is that throttling element is housed in the pipeline, and common throttling element is an orifice plate.Be characterized in simple in structure, long service life, adaptability is strong, and throttling orifice plate has reliable experimental, has realized standardization.But the differential pressure flowmeter measurement range is narrow, and general range ratio is three to one, the installation requirement strictness, and the pressure loss is big, and scale is non-linear.Though float type flow meter has overcome the shortcoming of differential pressure flowmeter, has simple in structure, use, easy to maintenance, less demanding to straight length before and after the instrument, the pressure loss is little and constant, and range ratio is big, characteristics such as applied widely, but because float is operated in the taper measuring tube, accomplish the high range ratio, float distance of run is bigger, need long measurement Taper Pipe (being generally 500MM), mechanical processing difficulty is bigger.

The purpose of this utility model is the deficiency at differential pressure flowmeter and float type flow meter, and a kind of simple structure is provided, and long service life, adaptability are strong, the short stroke linear graduation suspended body flowmeter that the pressure loss is little, stroke is short, have linear graduation.

The utility model is achieved in that short stroke linear graduation flowmeter comprises sensor and indicator.Sensor has the measuring tube of a straight pipe type, and the float of a band tapering is arranged in the straight pipe type measuring tube, and a cylindrical magnetic iron that is provided with is vertically arranged in the float.The top and bottom of float have one to go up guide pole and following guide pole respectively.Fix an orifice plate that cooperates with float and a floater guiding device that cooperates with following guide pole in the straight pipe type measuring tube.The top of straight pipe type measuring tube also is provided with a float stop.The two ends of straight pipe type measuring tube all have and the pipeline flange connecting.Indicator comprises the housing of being with taper shank.By lining, front-end bearing pedestal, rear bearing block and bearing the lobe plate axle is housed in the taper shank.On the lobe plate axle circular magnet is housed.Lobe plate is equipped with in the end of lobe plate axle.By bearing a needle pivot parallel with the lobe plate axle is housed in the housing.Install a connecting rod that has roller on the needle pivot, roller is pressed on the curved profile of lobe plate all the time.One end of needle pivot is equipped with pointer.Be shaped on linear graduation on the dial plate.Indicator is contained in the side at sensor measuring tube orifice plate position by taper shank, and is spatial vertical with measuring tube.

For making the pointer indication stable, be convenient to reading, on the indicator convexity wheel plate axle magnetic damping dish is housed, two damping magnetic patch are housed on the bearing seat close with the magnetic damping dish.

During work, fluid media (medium) is during by the orifice plate in the sensor, and a fluid stream will form local contraction in orifice plate, and flow velocity is increased, and static pressure reduces, and produces the row pressure differential before and after orifice plate.Making a concerted effort of the buoyancy that this pressure differential and float are subjected in fluid, make float overcome its gravity that is subjected to and move upward.When three force balance, float a certain position in measuring tube remains static.Because the suffered gravity of float is certain, the buoyancy that float is subjected in fluid is certain, so the pressure extent that it is subjected to is depended in the position of float in measuring tube, and the pressure extent depends on flow rate of fluid, thereby has determined the flow of fluid.

Because the dynamic action of fluid when being subjected to displacement in measuring tube, the circular magnet on magnet in the float and the indicator convexity wheel plate axle is coupled, and in discontiguous mode the displacement of float is passed to indicator when float.The rotating band moving cam plate rotation of lobe plate axle.Lobe plate drives needle pivot, pointer rotation by roller, connecting rod again, indicates the flow size, and the curve on the lobe plate is that actual condition such as the pressure, temperature, density, viscosity according to fluid carries out linear design and draws.

Compare with float type flow meter with existing differential flowmeter, the utlity model has advantages such as simple in structure, that working service convenient, the life-span is long, practical, range ratio is big, the pressure loss is little.It has not only reduced the difficulty of processing of measuring tube, and has dwindled the length of measuring tube, and it is long to make it all can make 250mm in any bore, has realized low running, thereby has saved material, has reduced manufacturing expense, has also reduced user's installation and maintenance expense.

The utility model is described in further detail below in conjunction with embodiment shown in the drawings:

Fig. 1 is a front view of the present utility model;

Fig. 2 is the structural map of sensor;

Fig. 3 is the structural map of indicator.

Short stroke linear graduation suspended body flowmeter is made up of sensor 1 and indicator 2, and as shown in Figure 1, both are spatial vertical and fit together.Sensor 1 has a straight pipe type measuring tube 6.Installing orifice plate 7 and floater guiding device 10 in the straight pipe type measuring tube 6.Have a cylindrical magnetic iron 9 that is provided with is vertically arranged in the float 8 of tapering.The upper and lower side of float 8 has one to go up guide pole 5 and following guide pole 11 respectively.Last guide pole 5 cooperates with float stop 4, and following guide pole 11 cooperates with floater guiding device 10.The two ends of straight pipe type measuring tube have flange 3 and flange 12 respectively.Indicator 2 comprises housing 25, pointer 27, dial plate 28.Taper shank 14 with sensor 1 assembling usefulness is arranged on the housing 25.By lining 15, rear bearing block 13, front-end bearing pedestal 21 and bearing lobe plate axle 16 is housed in the taper shank 14.By axle sleeve 18 circular magnet 17 is housed on the lobe plate axle 16.Lobe plate 29 is equipped with in the end of lobe plate axle 16.The needle pivot 26 of a band pointer 27 is housed by bearing 24 in the housing 25.The connecting rod 23 of a band roller 22 is housed on the needle pivot 26.Roller 22 all the time with lobe plate 29 on cam curve coincide.For making pointer 27 stable indications, lobe plate axle 16 nearby bearing seat one end is equipped with magnetic damping dish 19, and two damping magnetic patch 20 are housed on the front-end bearing pedestal 21.For the restriction range, on the lobe plate axle 16 limit alarm device 30 can be installed, this warning device can be implemented with known technology.

Claims (2)

1, a kind of short stroke linear graduation flowmeter comprises sensor and indicator, it is characterized in that sensor has the measuring tube of a straight pipe type, and the float of a band tapering is arranged in the straight pipe type measuring tube, a cylindrical magnetic iron that is provided with is vertically arranged in the float; The top and bottom of float have one to go up guide pole and following guide pole respectively; Fix an orifice plate that cooperates with float and a floater guiding device that cooperates with following guide pole in the straight rod type measuring tube; The top of straight pipe type measuring tube also is provided with a float stop; All there is the flange that is connected usefulness with pipeline at the two ends of straight pipe type measuring tube; Indicator comprises the housing of being with taper shank; By lining, front-end bearing pedestal, rear bearing block and bearing the lobe plate axle is housed in the taper shank; On the lobe plate axle circular magnet is housed; The end of lobe plate axle all is equipped with lobe plate; By bearing a needle pivot parallel with the lobe plate axle is housed in the housing; Install a connecting rod that has roller on the needle pivot, roller is pressed on the curved profile of lobe plate all the time; One end of needle pivot is equipped with pointer; Be shaped on linear graduation on the dial plate; Indicator is contained in the side at sensor measuring tube orifice plate position by taper shank, and is spatial vertical with measuring tube.

2, by the described short stroke linear graduation of claim 1 flowmeter, it is characterized in that on the indicator convexity wheel plate axle magnetic damping dish being housed, two damping magnetic patch are housed on the bearing seat close with the magnetic damping dish.

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