CN219015378U

CN219015378U - Float flowmeter with display gradient

Info

Publication number: CN219015378U
Application number: CN202223130804.2U
Authority: CN
Inventors: 任红磊; 李振宇; 郭相亨; 杨新圆; 周庆福
Original assignee: Catic Great Wall Measurement & Testing Tianjin Co ltd
Current assignee: Catic Great Wall Measurement & Testing Tianjin Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-05-12
Anticipated expiration: 2032-11-24

Abstract

The utility model discloses a float flowmeter with gradient display, and belongs to the technical field of instruments and meters. The utility model comprises a conical round tube, a movable float, a flow indicator, a plane, a level gauge and a float stop. The float flowmeter is provided with a plane which is mutually perpendicular to the conical round tube, and a level gauge for measuring the inclination of the conical round tube of the float flowmeter is arranged on the plane. Monitoring the inclination of the float flowmeter through the level meter, and adjusting the position of the float flowmeter to enable the inclination of the float flowmeter to meet the flow measurement requirement of the float flowmeter. To facilitate viewing of the level, a flat surface is provided on top of the float flowmeter. In order to carry out 360-degree omnibearing monitoring on the inclination of the float flowmeter, the level gauge adopts a bubble type circular level gauge. The level gauge and the plane adopt a detachable fixing mode. The float flowmeter and the level meter are of an integrated structure, and the level meter can display the inclination of the float flowmeter so as to ensure that the float flowmeter accurately measures the medium flow.

Description

Float flowmeter with display gradient

Technical Field

The utility model relates to a flow measuring device for measuring fluid medium, in particular to a float flowmeter for measuring the flow of the fluid medium, and belongs to the technical field of instruments and meters.

Background

The float flowmeter is also called rotameter and is a common flow measuring instrument, and is composed of a conical circular tube whose inner diameter is enlarged upwards and a float which floats up and down in the tube according to the flow of medium to be measured. The float flowmeter has the advantages of simple structure, low cost, stable operation, high reliability, small throttling pressure loss and the like, and particularly can measure the small flow of low Reynolds number medium, so that the float flowmeter is widely applied to flow measurement and automatic control systems of liquid and gas in the industrial fields of petroleum, coal, metallurgy, light industry, food sanitation and the like.

For a steady-flow, incompressible, non-viscous fluid, the pressure is low where the fluid velocity is high on the same fluid line. In the float flowmeter, when the medium to be measured passes through the annular gap between the movable float and the conical circular tube, a differential pressure DeltaP (P) is generated between the upstream and downstream of the movable float due to the throttling effect ₁ -P ₂ ) The magnitude of ΔP is proportional to the square of the flow velocity in the annular gap between the moving float and the tapered tubular, which is the Bernoulli equation

Wherein: Δp is the upstream and downstream differential pressure in Pa; ρ is the fluid density in kg/m ³ The method comprises the steps of carrying out a first treatment on the surface of the u is the flow rate of the fluid in m/s; c is a resistance coefficient and is dimensionless.

The basic structure of the float flowmeter comprises a conical circular tube, a movable float and a flow indicator, wherein fluid medium passes through the conical circular tube from bottom to top in use. When the measured medium passes through the annular gap between the floater and the conical circular tube, pressure difference is generated between the downstream and the upstream of the movable floater, and the larger the flow is, the higher the pressure difference is; as the pressure differential increases, the effective annular cross-sectional area between the float and the tapered tubular increases, which in turn decreases until the resultant of the differential pressure, gravity, buoyancy and viscous forces acting on the float is zero, the float being in an equilibrium position. The balance position of the floater in the conical circular tube corresponds to the measured medium flow, so that the balance position of the floater can be used as the representation scale of the medium flow.

The float flowmeter can be divided into a glass tube float flowmeter and a metal tube float flowmeter according to the material of the conical round tube, and as the medium flow and the height of the float have a certain corresponding relation, a graduated scale (the combination of a graduated line and a number) on the glass conical round tube can be used as a flow indication value; the metal taper pipe is opaque and cannot directly observe the position of the floater, so that a flow sensor, an indicator and a signal transmitter are required to be added to the metal pipe floater flowmeter; common shapes of the mobile floats are O-shaped, T-shaped, I-shaped and the like.

The measurement principle and structure of the float flowmeter determine that the conical round tube must be in a vertical direction to accurately measure the medium flow when the float flowmeter is in use. JJG257-2007 "float flowmeter" as national certification regulations for float flowmeters, clearly requires that "the degree of accuracy of the flowmeter at 1.0 level and 1.5 level should not exceed 2 °, and the degree of accuracy of the flowmeter at 2.5 level and below should not exceed 5 °", during factory calibration, use, and periodic certification or calibration. Thus, the float flowmeter has two problems in use, namely, if the float flowmeter is independently used, the inclination of the float flowmeter cannot be measured; if the level meter is used to measure the inclination of the float flowmeter, the level meter cannot be used to measure the inclination of the float flowmeter because the float flowmeter is not designed with a platform on which the level meter is specifically placed. Secondly, if the float flowmeter is installed on the equipment, whether the float flowmeter is vertical to the plane base of the equipment, or whether the equipment is horizontally placed, and whether the platform for placing the equipment is horizontally placed can influence the level meter to measure the inclination of the float flowmeter, and the measurement result has larger error.

Disclosure of Invention

In order to solve the problem of measuring the inclination of the float flowmeter, the main object of the utility model is to provide a float flowmeter with display inclination, wherein a plane which is mutually perpendicular to a conical circular tube is arranged on the float flowmeter, a level gauge for measuring the inclination of the conical circular tube of the float flowmeter is arranged on the plane, and the inclination of the float flowmeter is monitored by the level gauge.

The aim of the utility model is achieved by the following technical scheme.

The utility model discloses a float flowmeter with gradient display, which comprises a conical round tube, a movable float, a flow indicator, a plane, a level gauge and a float stop. The float flowmeter is provided with a plane which is mutually perpendicular to the conical round tube, and a level gauge for measuring the inclination of the conical round tube is arranged on the plane. The inclination of the float flowmeter is displayed by the level meter.

For 360 ° all-round monitoring of the inclination of the float flowmeter, preferably, the level is a bubble-type circular level.

In order to facilitate maintenance, replacement or calibration of the level, preferably the level and the plane are detachably fixed. Further preferably, the detachable fixing means includes screw connection or adhesive film attaching fixing.

To facilitate viewing of the level, a planar surface is preferably provided on the upper part of the float flowmeter.

The beneficial effects are that:

1. the utility model discloses a float flowmeter with displaying gradient, wherein a plane which is mutually perpendicular to a conical round tube is arranged on the float flowmeter, and a level meter for measuring the gradient of the float flowmeter is arranged on the plane. The inclination of the float flowmeter is monitored through the level meter, and then the position of the float flowmeter can be adjusted to enable the inclination of the float flowmeter to meet the flow measurement requirement of the float flowmeter.

2. The utility model discloses a float flowmeter with displaying gradient, wherein a level meter which is matched with the external structure and the size of the float flowmeter is arranged on the float flowmeter, so that the float flowmeter and the level meter are of an integrated structure, and the level meter can display the gradient of the float flowmeter in real time no matter whether the float flowmeter is used independently or is installed on the affiliated equipment.

3. The float flowmeter with the inclination display disclosed by the utility model is combined with the level meter in a detachable mode, and is convenient to detach and install when the level meter needs maintenance, replacement and calibration.

Drawings

FIG. 1 is a schematic illustration of a glass tube float flowmeter having a displayed inclination according to the present utility model; fig. 2 is a top view of a glass tube float flowmeter of the present utility model with a displayed inclination.

In the figure: 1-conical glass round tube, 2- "O-shaped" movable float, 3-flow indicator, 4-plane, 5-level, 6-float stop, 51-bubble, 52-horizontal scale mark.

FIG. 3 is a schematic illustration of a metallic tube float flowmeter having a displayed inclination in accordance with the present utility model; fig. 4 is a top view of a metal tube float flowmeter of the present utility model with a displayed inclination.

In the figure: 11-conical metal round tube, 21-T-shaped magnetic movable float, 31-magnetic induction flow indicator, 32-flow signal interface, 41-plane, 5-level meter, 61-float stop, 71-flange, 51-bubble and 52-horizontal scale mark.

Detailed Description

For a better description of the objects, structures and advantages of the present utility model, the following is a further description of the present utility model with reference to the accompanying drawings and examples.

Example 1:

taking a glass tube float flowmeter as an example, as shown in fig. 1 and 2. The embodiment discloses a glass tube float flowmeter with gradient display, which comprises a conical glass tube 1, a movable float 2, a flow indicator 3, a plane 4, a level meter 5 and a float stop 6. A plane 4 which is mutually perpendicular to the conical glass round tube 1 is arranged at the top of the glass tube float flowmeter, and a level meter 5 for measuring the inclination of the conical glass round tube 1 is arranged on the plane 4; the inclination of the glass tube float flowmeter is indicated by the horizontal graduation line 52 by the position of the bubble 51 in the level 5; the inclination of the glass tube float flowmeter meets the flow measurement requirement of the float flowmeter by adjusting the position of the glass tube float flowmeter.

In order to monitor the inclination of the glass tube float flowmeter at 360 ° full angle, the level 5 is a bubble type circular level.

In order to facilitate maintenance, replacement or calibration of the level 5, the level 5 and the plane 4 are detachably fixed. The detachable fixing mode is threaded connection fixing.

In order to facilitate the observation of the level meter 5, a plane 4 is arranged at the top of the conical glass round tube 1 of the glass tube float flowmeter, the plane 4 and the conical glass round tube 1 are required to be kept in a mutually perpendicular state during the assembly of the float flowmeter, and the calibrated level meter 5 is arranged above the plane 4.

Example 2:

taking a metal tube float flowmeter as an example, as shown in fig. 3 and 4. The embodiment discloses a metal tube float flowmeter with gradient display, which comprises a conical metal round tube 11, a magnetic movable float 21, a float stop 61, a magnetic induction flow indicator 31, a flange plate 71, a plane 41 and a level meter 5. The magnetic-inductive flow indicator 31 displays the flow value of the fluid and can transmit a flow value signal to the control system via the flow signal interface 32; a plane 41 perpendicular to the conical metal round tube 11 is arranged on the upper part of the magnetic induction flow indicator 31, and a level gauge 5 for measuring the inclination of the conical metal round tube 11 is arranged on the plane 41; the flange 71 is connected to the fluid conduit. The inclination of the metal tube float flowmeter is indicated by the horizontal graduation line 52 by the position of the bubble 51 in the level 5; the position of the metal tube float flowmeter is adjusted to enable the inclination of the metal tube float flowmeter to meet the flow measurement requirement of the float flowmeter.

To facilitate viewing of the level 5, a flat surface 41 is provided on top of the magnetically induced flow indicator 31.

In order to monitor the inclination of the metal tube float flowmeter in 360 ° all-round, the level 51 is a bubble type circular level.

For convenient maintenance, replacement or calibration of the level 5, the level 5 is attached to the upper surface of the plane 41 using an adhesive film.

While the foregoing is directed to embodiments of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.

Claims

1. A float flowmeter having a displayed inclination, characterized by: comprises a conical circular tube (1), a movable float (2), a flow indicator (3), a plane (4), a level meter (5) and a float stop (6); a plane (4) which is mutually perpendicular to the conical round tube (1) is arranged on the float flowmeter, and a level meter (5) for measuring the inclination of the conical round tube (1) is arranged on the plane (4); the inclination of the float flowmeter is displayed by a level meter (5).

2. A float flowmeter having a displayed inclination as claimed in claim 1 wherein: the level meter (5) adopts a bubble type circular level meter.

3. A float flowmeter having a displayed inclination as claimed in claim 1 wherein: the level meter (5) and the plane (4) are detachably fixed.

4. A float flow meter having a displayed inclination as claimed in claim 3 wherein: the detachable fixing mode comprises threaded connection or adhesive film attachment fixing.

5. A float flowmeter having a displayed inclination as claimed in claim 1 wherein: the plane (4) is arranged at the upper part of the float flowmeter.