CN220625448U

CN220625448U - Double-float flowmeter

Info

Publication number: CN220625448U
Application number: CN202223157426.7U
Authority: CN
Inventors: 陈雄波
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2024-03-19
Anticipated expiration: 2032-11-28

Abstract

The utility model discloses a double-float flowmeter, which comprises a control valve body and a flow display structure arranged at the top of the control valve body, wherein the flow display structure comprises a transparent pipe body, a taper pipe with the bottom end communicated with the control valve body, the top end sealed by a top end cover and the upper end big and lower end small is arranged in the transparent pipe body, an output port with the caliber smaller than the diameter of an upper float or the high width of the upper float is arranged at the upper part of the side wall of the taper pipe, a lower float and an upper float are arranged in the taper pipe, the specific gravity of the lower float is larger than that of the upper float, the upper float is positioned above the lower float, and the height of the output port from the top end of the taper pipe is larger than the diameter of the upper float. The utility model has reasonable structure, is provided with two floats with different specific gravities, can effectively and accurately measure the flow in different measuring ranges, enlarges the measuring range, is beneficial to improving the measuring precision, has low manufacturing cost, is simple, stable and reliable to use, and has strong applicability and wide application.

Description

Double-float flowmeter

Technical Field

The utility model belongs to the technical field of flowmeters, and particularly relates to a double-floater flowmeter.

Background

Float flowmeter principle: in a vertical tube with a conical bore that expands from bottom to top, the weight of the float is borne by the force generated by the bottom-to-top fluid and the flow indication variable area flow meter is represented by the height position of the float in the tube. Working principle: when the fluid to be measured passes through the annular gap formed by the taper pipe and the floater from bottom to top, differential pressure is generated at the upper end and the lower end of the floater to form the lifting force of the floater, when the lifting force borne by the floater is larger than the weight of the floater immersed in the fluid, the floater rises, the area of the annular gap is increased, the flow rate of the fluid at the annular gap is immediately reduced, the differential pressure at the upper end and the lower end of the floater is reduced, and the lifting force acting on the floater is also reduced until the lifting force is equal to the weight immersed in the fluid, and the floater is stabilized at a certain height. The height of the floater in the cone pipe is in corresponding relation with the passing flow.

From the above principle, we can see that the flow scale mark of the flowmeter depends on the taper of the taper pipe and the density specific gravity of the floater, namely: the flow scale of the flowmeter is related to the taper of the taper pipe and the density and specific gravity of the float material with the same volume. The larger the taper of the taper pipe of the flowmeter, the larger the flow scale marking value, and the larger the density specific gravity of the floater, the larger the flow scale marking value. Otherwise, the flow is marked with a scale value smaller. Therefore, if the taper pipes with the same length are required to be marked with large flow scales, the inner diameter taper of the taper pipe is required to be increased under the allowable condition, or the taper pipe is made of a material with high density and specific gravity at the same time. On the contrary, if the flow marking is needed with small scale, the inner diameter taper of the taper pipe is reduced as much as possible, and the float is made of a material with small density and specific gravity. Thus when a meter flow scale mark is once determined, its taper and float material must also be determined. When the taper of the conical tube with the same length is larger or the specific gravity of the float is larger, the flow through which the conical tube can pass is also large, and the tube and the float are suitable for being used as a large flowmeter. Otherwise, the flowmeter is small, and the flowmeter is suitable for being used as a small flowmeter. The smaller the taper, the greater the float displacement distance, the higher its visual discernable accuracy, and the higher its flow accuracy rating. However, it is impossible to make the tube infinitely long due to the influence of the tube length. In order to measure larger flow values, the taper of the pipe can only be increased, thus the visual flow accuracy is relatively reduced, after the taper is increased, the initial small flow scale is not discernable at all and is difficult to mark, the common flowmeter with slightly large flow points is left white at the minimum scale, the initial scale number is not zero, and the flowmeter can not measure the flow values below the marked scale. The small flow meter is just opposite to the large flow meter, and cannot measure a larger flow value. Therefore, one taper pipe can only be used for manufacturing one flowmeter, or you can only be used for manufacturing a large flowmeter with large taper or a small flowmeter with smaller taper. When you measure that the flow range of this meter is exceeded, you need to replace the meter. Therefore, a large flow rate is ensured, a small flow rate is not ensured, and the measurement accuracy is ensured. When the flow scale mark range is enlarged, the small flow measuring range is not ensured. In a word, the flowmeter can not simultaneously measure accurate small flow data and large flow data. Such as: a float flowmeter for measuring 15L/min has a float tube with effective scale mark length of 15cm, each 1cm scale is 1L/min, a short line is added in 1cm scale line, the flow mark of the short line is 0.5L/min, and the small flow scale is not recognized. Therefore, the error is 0.5L/min at the minimum, the minimum measuring range is 0.5L/min, and when the flow rate is required to be measured to be smaller than 0.5L/min, the flowmeter cannot be used and the small-range flowmeter needs to be replaced. However, when a small-scale flow meter, which is marked as the highest 3L/min, is required to be more than 3L/min, the process is also impossible. To solve this problem, a double tube flowmeter has appeared on the market. The flow meter base is the same, an air inlet interface is shared, a small-range flow meter (0-3L/min) and a large-range flow meter (2-15L/min) are shared, the flow rate is controlled by two regulating control valves respectively, and the two flow meters with different range ranges are combined. The flowmeter has larger volume and weight, needs to be operated separately and is more troublesome. Therefore, the utility model is a buoy flowmeter which can measure large and small flow simultaneously by controlling one valve without increasing the volume and the weight on the existing single-tube flowmeter.

However, the existing float type flowmeter cannot achieve the point that the large-flow-rate and small-flow-rate can only be measured by a large-range flowmeter, and the small-flow-rate can not be measured by the same flowmeter within two range. To make both measurements, the different range flowmeters must be replaced. Such replacement is cumbersome and requires increased costs.

Disclosure of Invention

The utility model aims to provide a double-float flowmeter, which aims to solve the technical problem that the flow measurement range of the flowmeter in the prior art is limited.

The technical scheme for achieving the purpose is that the double-float flowmeter comprises a control valve body and a flow display structure arranged at the top of the control valve body, wherein the flow display structure comprises a transparent pipe body, the inside of the transparent pipe body is provided with a taper pipe with the bottom end communicated with the control valve body and the top end sealed through a top end cover and the upper end big and the lower end small, a lower float and an upper float are arranged in the taper pipe, the upper part of the side wall of the taper pipe is provided with an output port with the caliber smaller than the diameter of the upper float or the high width of the upper float, the caliber of the output port is smaller than the diameter of the upper float or the lower float so as to prevent the upper float or the lower float from being blown out of the taper pipe, the specific gravity of the lower float is larger than that of the upper float, the upper float is positioned above the lower float, and the height of the output port from the top end of the taper pipe is larger than the diameter of the upper float.

Further preferred are: the transparent pipe body is provided with a small-flow scale mark and a large-flow scale mark, and the small-flow scale mark and the large-flow scale mark are positioned on the left edge and the right edge of the taper pipe.

Further preferred are: the transparent pipe body is a glass pipe body or a transparent plastic pipe.

Further preferred are: the bottom of taper pipe is equipped with the input port, the bottom activity butt of lower float is on the input port.

Further preferred are: the diameter of the lower floater is the same as or smaller than the bottom diameter of the taper pipe.

Further preferred are: the lower floater is a high-density material floater, and the upper floater is a low-density material floater.

Further preferred are: the diameter of the upper float is equal to or greater than the diameter of the lower float.

The working principle is briefly described as follows: when the control valve body is opened, the small-flow gas flow is controlled firstly, the upper floater with light specific gravity in the taper pipe is lifted firstly, along with the increase of the flow, the upper floater floats from low to high, the lower floater is gradually lifted, at the moment, the record is recorded according to the small-flow scale mark, when the flow is continuously increased, the upper floater with small specific gravity enters the top of the taper pipe, at the moment, the floating capacity is lost, at the moment, the floating height of the large floater is standard, and the flow is recorded according to the large-flow scale mark.

The utility model has the positive effects that: the utility model has reasonable structure, is provided with two floats with different specific gravities, expands the range of a single flowmeter, can effectively and accurately meter the flow in different range, expands the metering range, is beneficial to improving the metering precision, and has simple, stable and reliable use, strong applicability and wide application.

Drawings

In order that the utility model may be more readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings, in which:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of a small flow operating state;

FIG. 3 is a schematic diagram of the structure of the high-flow operating state.

Reference numerals: the control valve body 1, the flow display structure 2, the transparent tube body 21, the taper tube 22, the output port 23, the lower floater 24, the upper floater 25, the small flow scale mark 3, the large flow scale mark 4 and the input port 5.

Detailed Description

Example 1

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, a double-float flowmeter comprises a control valve body 1 and a flow display structure 2 arranged at the top of the control valve body, wherein the flow display structure 2 comprises a transparent pipe body 21, and in the embodiment, the transparent pipe body is a glass pipe body or a transparent plastic pipe. The control valve body is used for adjusting the flow.

The inside of transparent body is equipped with the bottom and is linked together with the control valve body, and the top is sealed through the top lid and the big lower extreme taper tube 22 of upper end is little, be equipped with float 24 and last float 25 in the taper tube, in this embodiment, it sets up the taper tube to when the float rises, the air current can follow the clearance between float and the taper tube inner wall and upwards flow, the delivery outlet 23 of bore less than last float diameter or high width has been seted up to the lateral wall upper portion of taper tube, the specific gravity of float is greater than the specific gravity of float down, in this embodiment, the diameter of float is equal to or is greater than the diameter of float down. The lower float is a high-density material float, such as a stainless steel material body, and the upper float is a low-density material float, such as an aluminum material body. Stainless steel: 7.93g/cm ³ And aluminum: 2.7g/cm ³ In the practical application process, other two materials with different specific gravities can be adopted, and the two floats have the same volume or the volume of the upper float is larger than that of the lower float, so that the weight with large specific gravity is large.

In the practical application process, the upper floater is positioned above the lower floater, and the diameter of the lower floater is the same as or smaller than the diameter of the bottom of the taper pipe. The height of the output port from the top end of the taper pipe is larger than or smaller than the diameter of the upper floater.

In order to be convenient for read the flow, be equipped with low discharge scale mark 3 and big flow scale mark 4 on the transparent body, low discharge scale mark and big flow scale mark are in on the left and right sides of tapering pipe. The corresponding reading of the value corresponding to the small flow scale mark when the upper float with a relatively light specific gravity is used for metering, and the corresponding reading of the value corresponding to the large flow scale mark when the lower float with a relatively heavy specific gravity is used for metering, wherein in fig. 2 and 3, the marks corresponding to the upper floats are denoted by B, and the marks corresponding to the lower floats are denoted by A.

The bottom of taper pipe is equipped with input port 5, the bottom activity butt of lower float is on the input port.

The working principle is briefly described as follows: when the control valve body is opened, the small-flow gas flow is controlled firstly, the upper floater with light specific gravity in the taper pipe is lifted firstly, along with the increase of the flow, the upper floater is lifted from low to high, the lower floater is gradually lifted, at the moment, the record is recorded according to the small-flow scale mark, as shown in fig. 2, when the flow is continuously increased, the upper floater with small specific gravity enters the top of the taper pipe, at the moment, the floating capacity is lost, at the moment, the floating height of the lower floater is standard, and the flow is recorded according to the large-flow scale mark, as shown in fig. 3.

The utility model has reasonable structure arrangement, is provided with two floats with different specific gravities, can effectively and accurately measure the flow in different measuring ranges, enlarges the measuring range, is beneficial to improving the measuring precision, is simple, stable and reliable in use, and has strong applicability and wide application.

The standard components used in this embodiment may be purchased directly from the market, but the nonstandard structural components described in the specification may also be obtained directly by unambiguous processing according to the common general knowledge in the prior art, and meanwhile, the connection manner of each component adopts the conventional means mature in the prior art, and the machinery, the components and the equipment all adopt the conventional types in the prior art, so that no specific description will be made here.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While those obvious variations or modifications which come within the spirit of the utility model remain within the scope of the utility model.

Claims

1. The utility model provides a two float flowmeter, includes control valve body and sets up the flow display structure at control valve body top, its characterized in that: the flow display structure comprises a transparent pipe body, wherein the inside of the transparent pipe body is provided with a taper pipe, the bottom end of the taper pipe is communicated with a control valve, the top end of the taper pipe is sealed through a top end cover, the upper end of the taper pipe is large, the lower end of the taper pipe is small, a lower floater and an upper floater are arranged in the taper pipe, the upper part of the side wall of the taper pipe is provided with an output port, the caliber of which is smaller than the diameter of the upper floater or the high width of the upper floater, the specific gravity of the lower floater is greater than that of the upper floater, the upper floater is positioned above the lower floater, and the height of the output port from the top end of the taper pipe is greater than the diameter of the upper floater.

2. A dual float flow meter as claimed in claim 1 wherein: the transparent pipe body is provided with a small-flow scale mark and a large-flow scale mark, and the small-flow scale mark and the large-flow scale mark are positioned on the left edge and the right edge of the taper pipe.

3. A dual float flow meter as claimed in claim 2 wherein: the transparent pipe body is a glass pipe body or a transparent plastic pipe.

4. A dual float flow meter as claimed in claim 3 wherein: the bottom of taper pipe is equipped with the input port, the bottom activity butt of lower float is on the input port.

5. A dual float flow meter as claimed in claim 1 wherein: the diameter of the lower floater is the same as or smaller than the bottom diameter of the taper pipe.

6. A dual float flow meter as claimed in claim 1 wherein: the lower floater is a high-density material floater, and the upper floater is a low-density material floater.

7. A dual float flow meter as claimed in claim 1 wherein: the diameter of the upper float is equal to or greater than the diameter of the lower float.