CN102853868B - Two-way multifunctional rotor flow meter - Google Patents

Abstract

The invention discloses a two-way multifunctional rotor flow meter which comprises a connection pipe, a disassembly opening, a taper pipe, an outer housing, a rotor, a support seat and a flange plate, wherein the rotor is arranged inside the taper pipe; the rotor is the rotor with adjustable density, and can be taken out from the taper tube through the disassembly opening to adjust the density; the taper tube is cladded by the outer housing; and the connection pipe is connected with the taper pipe through the support seat, and the flange plate is connected with a pipeline. Two-way fluid flow of which the flow direction is from top to bottom or from bottom to top can be measured, and the two-way multifunctional rotor flow meter has wider practicability in the field of fluid flow measurement of a pipeline when being compared with the traditional rotor flow meter.

Description

Bidirectional multifunctional spinner-type flowmeter

Technical field

The present invention relates to pipeline fluid flow measurement technology field, be specifically related to a kind of bidirectional multifunctional spinner-type flowmeter, can measure various different densities, flow to as from top to bottom or bottom-up bidirectional fluid flow.

Background technology

From in the last few years, in each departments such as the chemical industry of China, oil, light industry, medicine, chemical fertilizer, chemical fibre, food, dyestuff, environmental protection and scientific research, conventional spinner-type flowmeter is measured the flow of single-phase non-pulsation (liquid or gas) fluid.But present adopted spinner-type flowmeter all has following some weak point:

1, traditional spinner-type flowmeter can only be measured and flow to as bottom-up fluid flow, for flow to for top-down fluid can not measuring flow;

2, traditional spinner-type flowmeter can only be measured the fluid flow of single vertical direction, when flow direction changes, cannot measure it;

3, traditional spinner-type flowmeter can only be measured the fixed fluid flow of certain density, cannot measure the fluid flow that density changes.

Summary of the invention

The defect or the deficiency that for above conventional rotors flowmeter, exist, the object of the invention is to, provide a kind of novel bidirectional multifunctional spinner-type flowmeter, can make up above-mentioned weak point, can measure various different densities, flow to is bidirectional fluid flow from top to bottom or from bottom to top.

In order to realize above-mentioned task, the present invention takes following technical solution:

A bidirectional multifunctional spinner-type flowmeter, is characterized in that, this flowmeter comprises connecting pipe, dismounting mouth, tapered tube, outer casing, rotor, supporting base and ring flange; Wherein, rotor is positioned at tapered tube inside, and this rotor is density-adjustable rotor, can from tapered tube, be taken out and carry out Auto-regulating System of Density of Heavy Medium by dismounting mouthful; Tapered tube is coated by outer casing, and connecting pipe is connected with tapered tube by supporting base, and ring flange is connected with pipeline.

Above-mentioned rotor has the mouth of switching, injects the known mark liquid of density, or make rotor be hollow state by opening and closing mouth in rotor.

Above-mentioned tapered tube is provided with double scale, in order to measure from top to bottom or the fluid flow of both direction from bottom to top.

Bidirectional multifunctional spinner-type flowmeter of the present invention, can measure the bidirectional fluid flow flowing to as or from bottom to top from top to bottom, and rotor is wherein density-adjustable rotor, and tapered tube adopts double scale in order to measure bidirectional fluid flow simultaneously.In addition, in order to facilitate Switch Rotor density to measure two-way fluid flow, thereby on traditional spinner-type flowmeter basis, device for convenience detach has been added in design, with this, is able to the effect of handover measurement bidirectional fluid flow at any time.Than traditional spinner-type flowmeter, have more dirigibility.In the face of pipeline inner fluid, turn to suddenly or pipeline in type of fluid change while causing the density of detected fluid to change these emergency case, can effectively tackle.With respect to traditional spinner-type flowmeter, in pipeline fluid flow measurement field, there is practicality more widely.

Accompanying drawing explanation

Fig. 1 is equipment body structural representation of the present invention, and wherein (a) figure measures to flow to as top-down fluid flow structural representation; (b) figure measures the fluid flow structural representation flowing to as from bottom to top;

Fig. 2 is the scheme of installation of dismounting mouth;

Fig. 3 rotor schematic diagram, wherein (a) is that the measurement flow direction is the rotor schematic diagram of top-down fluid flow; (b) be to measure the rotor schematic diagram that the flow direction is fluid flow from bottom to top.

Below in conjunction with drawings and Examples, the present invention is described in further detail.

Embodiment

Referring to (a) in Fig. 1 and (b), the present embodiment provides a kind of bidirectional multifunctional spinner-type flowmeter, comprises connecting pipe 1, dismounting mouthfuls 2, tapered tube 3, outer casing 4, rotor 5, supporting base 6 and ring flange 7; Wherein, rotor 5 is positioned at tapered tube 3 inside, and this rotor 5 is density-adjustable rotor, can from tapered tube 3, be taken out and carry out Auto-regulating System of Density of Heavy Medium by dismounting mouth 2; Tapered tube 3 is coated by outer casing 4, and connecting pipe 1 is connected with tapered tube 3 by supporting base 6, and ring flange 7 is connected with pipeline.

Rotor 5 can be by the switching mouth that arranges to the known mark liquid of the interior injection density of rotor 5, or make rotor 5 be hollow state.On tapered tube 3, be provided with double scale, in order to measure from top to bottom or the fluid flow of both direction from bottom to top.

The function of the bidirectional multifunctional rotor flow that the present embodiment is made is:

1, measure the fluid flow of different densities, its principle of operation is can be by inject the mark liquid of certain known density in rotor, to reach the object of measuring different densities fluid flow.

2, measure to flow to the fluid flow for from bottom to top, its principle of operation, as traditional glass rotameter, is greater than by rotor self gravitation the pressure differential that himself buoyancy and detected fluid cause rotor.When the continuous increase of pressure differential causes rotor stress balance, its scale value of reading is the flow value of detected fluid by conversion.

3, measure and flow to as top-down fluid flow, fluid to be measured from up to down passes through from the annulus between tapered tube and rotor.Rotor is subject to three power effects: two downward power (rotor self gravitation, the pressure differential that the rotor throttling action being caused by liquid flow produces), the power making progress is rotor buoyancy.During beginning, downward power is greater than buoyancy, and rotor moves downward, and along with the decline of rotor, the circulation area between rotor and tapered tube increases, and flow velocity reduces, and rotor is subject to the downward power of fluid to be reduced.When fluid force and buoyant equilibrium, rotor rests on a certain height.Convert flow signal to displacement signal thus.

Concrete theoretical formula is derived as follows:

Ignore the friction force of fluid to rotor, equation during rotor balancing:

ρ ₁Vg＝ρ ₂Vg±ΔpA （1）

In formula: ρ ₁: rotor material density;

V: rotor volume;

G: acceleration of gravity;

ρ ₂: fluid density;

A: rotor the maximum cross-section area;

Δ p: rotor pressure difference, Δ p=|p ₁-p ₂|

Work as ρ ₁> ρ ₂time, get "+", work as ρ ₁< ρ ₂time, get "-";

By (1) formula, released:

$\mathrm{\&Delta;p}=\&PlusMinus;\frac{1}{A}\mathrm{Vg}({\mathrm{\&rho;}}_1-{\mathrm{\&rho;}}_2)---\left(2\right)$

In formula, work as ρ ₁> ρ ₂time, get "+", work as ρ ₁< ρ ₂time, get "-".

By Bernoulli equation, can derive and flow through the pressure reduction that produces before and after rotor and the pass between volume is:

$Q=\mathrm{\&alpha;}{A}_0\sqrt{\frac{2\mathrm{\&Delta;p}}{{\mathrm{\&rho;}}_2}}---\left(3\right)$

In formula: α: coefficient of flow, with rotor shapes, size is relevant;

A ₀: circular passage area between rotor and taper tube wall;

Because the cone angle of tapered tube is less, so A ₀height h with rotor in tapered tube is approximated to proportionate relationship, that is:

A ₀＝Ch （4）

In formula, C is the scale-up factor relevant with tapered tube tapering.

By (2) (3) (4) simultaneous, cancellation Δ p and A ₀:

$Q=\mathrm{\&alpha;Ch}\sqrt{\frac{2\mathrm{gV}}{A}}\sqrt{\frac{\&PlusMinus;({\mathrm{\&rho;}}_1-{\mathrm{\&rho;}}_2)}{{\mathrm{\&rho;}}_2}}---\left(5\right)$

In formula, work as ρ ₁> ρ ₂time, get "+", work as ρ ₁< ρ ₂time, get "-";

From formula (5), flow is with highly relevant.Coefficient of flow α is relevant with the Reynolds number of rotor shapes and pipeline.When Reynolds number reaches a certain numerical value, α is tending towards a constant.Flow Q and height H are linear.

In Fig. 1, connecting pipe 1 is for being connected between flowmeter and test traffic pipeline section, the effect of dismounting mouthfuls 2 is that the flow direction difference measured or density are when different, can rotor 5 be taken out by dismounting mouthfuls 2, by changing that the gravity of rotor 5 reaches from top to bottom or the measurement of fluid flow on both direction and the measurement of fluid flow that reaches different densities by changing the density of rotor 5 from bottom to top.Detected fluid is flowed through in tapered tube 3, and during by equilibrium state, the flow that detected fluid is inferred in the stop place of rotor 5.Outer casing 4 is not subject to the damage of extraneous collision for the protection of tapered tube 3, shield.Supporting base 6 is for fixing tapered tube 3.The effect of ring flange 7 is that flowmeter is fixed on pipeline.

Be below the bidirectional multifunctional spinner-type flowmeter specific works principle about the present embodiment, inventor be take and measured clear water and illustrate as follows as example:

As shown in Figure 1a: what this Fig. 1 a mainly showed is to measure to flow to as top-down clear water flow.In figure, tapered tube 3 is upper narrow lower wealthy, and the rotor 5 of employing is set as that density is less than clear water and keeps hollow state.When clear water enters tapered tube 3 by connecting pipe 1, rotor 5 is subject to the effect of three power.The self gravitation that direction is downward, the pressure reduction that direction that clear water causes rotor 5 is downward and the buoyancy making progress.When rotor 5 stress balance, read the reading parallel with rotor 5 uppermost edge, the scale of choosing be with tapered tube 3 on the narrow lower wealthy read text scale matching.The scale value of reading is the flow value of tested clear water.

As shown in Figure 1 b: what this Fig. 1 b mainly showed is to measure the clear water flow flowing to as from bottom to top.In figure, tapered tube 3 is upper wealthy lower narrow, and the rotor 5 of employing is set as filling with glycerine in that density is greater than clear water and rotor 5.When clear water enters tapered tube 3 by connecting pipe 1, rotor 5 is subject to the effect of three power.The self gravitation that direction is downward, the pressure reduction that the direction that the buoyancy that rotor 5 self makes progress and clear water cause rotor 5 makes progress.When rotor 5 stress balance, read the reading parallel with rotor uppermost edge, the scale of choosing be with tapered tube 3 on the wealthy lower narrow read text scale matching.The scale value of reading is the flow value of tested clear water.

As shown in Figure 2: the installation of dismounting mouth 2 adopts screw 8, wherein the effect of screw 8 is that dismounting mouth 2 is fixed on outer casing 4, when unloading screw 8, can dismounting mouth 2 is separated with tapered tube 3, rotor 5 can be taken out, it be adjusted, to adapt to the measurement of fluid flow of different directions.

As shown in Figure 3: this figure is the schematic diagram of rotor 5.In order to meet the mensuration to bidirectional fluid flow, the present invention transforms rotor 5.In the present embodiment, the density of rotor 5 can change.Specifically the switching mouth 9 by rotor 5 tops injects the known mark liquid of density in rotor 5.For example, when tested fluid is clear water, in the past in rotor 5 Injection of Glycerol to change the density of rotor.When changing rotor 5 density, can also change the gravity of rotor 5.By like this change of rotor 5 being met measuring the condition of bidirectional fluid flow.

For example, shown in Fig. 3 (a) be when tested direction of flow be from top to bottom time, the state of flowmeter rotor, now the density of rotor 5 self is less than the density of detected fluid, and rotor now 5 is hollow state.

Shown in Fig. 3 (b) be when tested direction of flow be from bottom to top time, it in flowmeter, is the state of rotor 5, now rotor 5, owing to injecting the mark liquid of certain known density in self, causes the density of rotor 5 to be greater than the density of detected fluid, and is full state in rotor now 5.

Claims (2)

1. a bidirectional multifunctional spinner-type flowmeter, is characterized in that, this flowmeter comprises connecting pipe (1), dismounting mouthful (2), tapered tube (3), outer casing (4), rotor (5), supporting base (6) and ring flange (7); Wherein, rotor (5) is positioned at tapered tube (3) inside, and this rotor (5) is density-adjustable rotor, can from tapered tube (3), be taken out and carry out Auto-regulating System of Density of Heavy Medium by dismounting mouthful (2); Tapered tube (3) is coated by outer casing (4), and connecting pipe (1) is connected with tapered tube (3) by supporting base (6), and ring flange (7) is connected with pipeline;

On described rotor (5), there is the mouth of switching, by opening and closing mouth, in rotor (5), inject the known mark liquid of density, or make rotor (5) be hollow state;

Connecting pipe (1) is for being connected between flowmeter and test traffic pipeline section, the effect of dismounting mouthful (2) is that the flow direction difference measured or density are when different, by dismounting mouthful (2), rotor (5) is taken out, by changing that the gravity of rotor (5) reaches from top to bottom or the measurement of fluid flow on both direction and the measurement of fluid flow that reaches different densities by the density of change rotor (5) from bottom to top; Detected fluid is flowed through in tapered tube (3), and the flow that detected fluid is inferred in the stop place of rotor during by equilibrium state (5).

2. bidirectional multifunctional spinner-type flowmeter as claimed in claim 1, is characterized in that, described tapered tube (3) is provided with double scale, in order to measure from top to bottom or the fluid flow of both direction from bottom to top.