CN102853868A - 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

The 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, spinner-type flowmeter commonly used is measured the flow of single-phase non-pulsation (liquid or gas) fluid.But the present spinner-type flowmeter that adopts all has following some weak point:

1, traditional spinner-type flowmeter can only be measured to flow to and be bottom-up fluid flow, for flow to for the 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, can't measure it;

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

Summary of the invention

Defective or deficiency for above conventional rotors flowmeter existence, the object of the invention is to, provide a kind of novel bidirectional multifunctional spinner-type flowmeter, can remedy above-mentioned weak point, can measure various different densities, flow to as from top to bottom or bidirectional fluid flow from bottom to top.

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

A kind of 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 the density-adjustable rotor, can take out from tapered tube by the dismounting mouth and carry out Auto-regulating System of Density of Heavy Medium; Tapered tube is coated by outer casing, and connecting pipe links to each other with tapered tube by supporting base, and ring flange links to each other with pipeline.

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

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 be measured and flows to as from top to bottom or bidirectional fluid flow from bottom to top, and rotor wherein is the density-adjustable rotor, and tapered tube adopts double scale in order to measure the bidirectional fluid flow simultaneously.In addition, in order to make things convenient for Switch Rotor density measuring two-way fluid flow, thereby add device for convenience detach in traditional spinner-type flowmeter basis design, be able to the at any time effect of handover measurement bidirectional fluid flow with this.Have more dirigibility than traditional spinner-type flowmeter.Turn to suddenly in the face of the pipeline inner fluid or pipeline in type of fluid when changing the density cause detected fluid and changing these emergency case, can effectively tackle.With respect to traditional spinner-type flowmeter, in pipeline fluid flow measurement field, has more widely practicality.

Description of drawings

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

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

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

The present invention is described in further detail below in conjunction with drawings and Examples.

Embodiment

Referring to (a) among Fig. 1 and (b), 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 the density-adjustable rotor, can take out from tapered tube 3 by dismounting mouth 2 and carry out Auto-regulating System of Density of Heavy Medium; Tapered tube 3 is coated by outer casing 4, and connecting pipe 1 links to each other with tapered tube 3 by supporting base 6, and ring flange 7 links to each other with pipeline.

Rotor 5 can be by the switching mouth that arranges to the known mark liquid of rotor 5 interior injection density, or make rotor 5 be hollow state.Be provided with double scale at tapered tube 3, 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 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 purpose of measuring the different densities fluid flow.

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

3, measure the flow direction and be 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 that is caused by liquid flow produces), the power that makes 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 the 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 fluid to the friction force of rotor, equation during rotor balancing:

ρ ₁Vg＝ρ ₂Vg±ΔpA （1）

In the 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 ₂The time, get "+", work as ρ ₁＜ρ ₂The time, get "-";

Released by (1) formula:

$\mathrm{\Δp}=\±\frac{1}{A}\mathrm{Vg}({\mathrm{\ρ}}_1-{\mathrm{\ρ}}_2)---\left(2\right)$

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

Can be derived by Bernoulli equation and to flow through the pressure reduction that produces before and after the rotor and the pass between the volume is:

$Q=\mathrm{\α}{A}_0\sqrt{\frac{2\mathrm{\Δp}}{{\mathrm{\ρ}}_2}}---\left(3\right)$

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

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

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

A ₀＝Ch （4）

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

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

$Q=\mathrm{\&alpha;<figure-callout\; id="2"\; label="Ch"\; filenames="HDA00002027775700011.png,HDA00002027775700021.png"\; state="\{\{state\}\}">Ch</figure-callout>}\sqrt{\frac{2\mathrm{gV}}{A}}\sqrt{\frac{\&PlusMinus;({\mathrm{\&rho;}}_1-{\mathrm{\&rho;}}_2)}{{\mathrm{\&rho;}}_2}}---\left(5\right)$

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

By formula (5) as can be known, flow is with highly relevant.Coefficient of flow α is relevant with the Reynolds number of rotor shapes and pipeline.When Reynolds number reached a certain numerical value, α was tending towards a constant.Flow Q and height H are linear.

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

Below be the bidirectional multifunctional spinner-type flowmeter specific works principle about present embodiment, the inventor carries out following explanation as an example of the measurement clear water example:

As shown in Figure 1a: what this Fig. 1 a mainly showed is to measure to flow to be top-down clear water flow.Tapered tube 3 is upper narrow lower wealthy among the figure, the rotor 5 of employing be set as density less than clear water and keep hollow state.When clear water entered tapered tube 3 by connecting pipe 1, rotor 5 was subject to the effect of three power.The self gravitation that direction is downward, the pressure reduction that the direction that clear water causes rotor 5 is downward and the buoyancy that makes 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 that is complementary.The scale value of reading is the flow value of tested clear water.

Shown in Fig. 1 b: what this Fig. 1 b mainly showed is to measure the clear water flow that flows to as from bottom to top.Tapered tube 3 is upper wealthy lower narrow among the figure, the rotor 5 of employing be set as density greater than clear water and rotor 5 in fill with glycerine.When clear water entered tapered tube 3 by connecting pipe 1, rotor 5 was 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 the rotor uppermost edge, the scale of choosing be with tapered tube 3 on the wealthy lower narrow read text scale that is complementary.The scale value of reading is the flow value of tested clear water.

As shown in Figure 2: screw 8 is adopted in the installation of dismounting mouth 2, and wherein the effect of screw 8 is that dismounting mouth 2 is fixed on the outer casing 4, when unloading screw 8, dismounting mouthfuls 2 can be 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 synoptic diagram of rotor 5.In order to satisfy the mensuration to the 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.When for example tested fluid is clear water, in the past in the 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 satisfied 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 the time, the state of flowmeter rotor, this moment rotor 5 self density less than the density of detected fluid, and the rotor 5 of this moment is hollow state.

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

Claims (3)

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 the density-adjustable rotor, can take out from tapered tube (3) by dismounting mouthful (2) and carry out Auto-regulating System of Density of Heavy Medium; Tapered tube (3) is coated by outer casing (4), and connecting pipe (1) links to each other with tapered tube (3) by supporting base (6), and ring flange (7) links to each other with pipeline.

2. bidirectional multifunctional spinner-type flowmeter as claimed in claim 1 is characterized in that, the mouth of switching is arranged on the described rotor (5), injects the known mark liquid of density by opening and closing mouth in rotor (5), or makes rotor (5) be hollow state.

3. 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.

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