CN103575337A - Turbine flow meter and method for measuring fluid - Google Patents

Abstract

The invention provides a turbine flow meter and a method for measuring fluid flow. A currently-used turbine flow meter is poor in anti-interference capacity, less functional, low in performance, unreliable in measurement, high in cost and complex in structure. The turbine flow meter comprises a shell body (1). The shell body is connected with a front guiding frame assembly (2) and an electromagnetic sensing converter (3) provided with an amplifier, the front guiding frame assembly is connected with an impeller assembly (4), the impeller assembly is connected with a rear guiding frame assembly (5), and the rear guiding frame assembly is connected with a compression ring (6). The turbine flow meter is used for measuring the fluid flow.

Description

Turbine flow is taken into account fluid measurement method

technical field:

the present invention relates to a kind of turbine flow and take into account fluid measurement method.

background technology:

a little less than the turbo flow meter antijamming capability using at present, function is few, and performance is low, and it is unreliable to measure, and cost is high, complex structure.

summary of the invention:

the object of this invention is to provide a kind of turbine flow and take into account fluid measurement method.

above-mentioned object realizes by following technical scheme:

a kind of turbo flow meter, its composition comprises: housing, described housing with leading to frame component, be connected with the magneto-electric induction converter of amplifier, described be leadingly connected with impeller assembly to frame component, described impeller assembly is connected with rear guide frame assembly, and described rear guide frame assembly is connected with compacting ring.

described turbo flow meter, described is leading to frame component, non-magnetic stainless steel or the making of duralumin material for rear guide frame assembly, be arranged on sensor import and export, convection cell plays guiding rectification and supports impeller, avoids the impact of flow disturbance on impeller.

described turbo flow meter, described impeller is led cruel property material by height and is made.

a kind of fluid measurement method of turbo flow meter, the method comprises the steps: first flow velocity to be converted to the rotating speed of turbine, again rotating speed is converted to the electric signal being directly proportional to flow, for detection of instantaneous delivery and total integrating flow, its output signal is frequency, be easy to digitizing, inductive coil is fixed on housing together with permanent magnet, when ferromagnetism turbo blade process magnet, the magnetic resistance of magnetic circuit changes, thereby generation induced signal, signal amplifies and shaping through amplifier, deliver to counter or frequency meter, show total integrating flow, simultaneously by pulsed frequency through overfrequency-voltage transitions with indication instantaneous delivery.

the fluid measurement method of described turbo flow meter, the revolution of described impeller is proportional to the total amount that flows through fluid.

beneficial effect:

1. the output of turbo flow meter of the present invention is frequency modulation (PFM) formula signal, has not only improved the anti-interference of testing circuit, and has simplified flow quantity detecting system.Its range ratio can reach 10:1, and precision is in ± 0.2%.The time constant of the turbo flow meter that inertia is little and size is little can reach 0.01 second.

the pressure loss of the present invention is little, has higher anti-electromagnetic interference (EMI) and anti-vibration ability, dependable performance long working life, adopt advanced super low-power consumption single chip microcomputer technology, complete machine function is strong, low in energy consumption, superior performance, has the intelligent flow display of nonlinear precision compensate function.Correction formula precision is better than ± and 0.02%.

instrument coefficient of the present invention can be arranged online by button, and can be presented on liquid crystal display, and liquid crystal display is visual and clear, and reliability is high; Adopt EEPROM to carry out power down protection to integrated flux, instrument coefficient.

accompanying drawing explanation:

accompanying drawing 1 is structural representation of the present invention.

embodiment:

embodiment 1:

a kind of turbo flow meter, its composition comprises: housing 1, described housing with leading to frame component 2, be connected with the magneto-electric induction converter 3 of amplifier, described be leadingly connected with impeller assembly 4 to frame component, described impeller assembly is connected with rear guide frame assembly 5, and described rear guide frame assembly is connected with compactingring 6.

embodiment 2:

according to the turbo flow meter described in embodiment 1, described leadingly to frame component, rear guide frame assembly, select not magnetic conduction, stainless steel or duralumin material are made, and are arranged on sensor import and export, convection cell plays guiding rectification and supports impeller, avoids the impact of flow disturbance on impeller.

embodiment 3:

according to the turbo flow meter described in embodiment 1 or 2, described impeller is led cruel property material by height and is made.

embodiment 4:

a kind of fluid measurement method of turbo flow meter, the method comprises the steps: first flow velocity to be converted to the rotating speed of turbine, again rotating speed is converted to the electric signal being directly proportional to flow, for detection of instantaneous delivery and total integrating flow, its output signal is frequency, be easy to digitizing, inductive coil is fixed on housing together with permanent magnet, when ferromagnetism turbo blade process magnet, the magnetic resistance of magnetic circuit changes, thereby generation induced signal, signal amplifies and shaping through amplifier, deliver to counter or frequency meter, show total integrating flow, simultaneously by pulsed frequency through overfrequency-voltage transitions with indication instantaneous delivery.

embodiment 5:

according to the fluid measurement method of the turbo flow meter described in embodiment 4, the revolution of described impeller is proportional to the total amount that flows through fluid.

embodiment 6:

the fluid measurement method of above-mentioned turbo flow meter, the method comprises the steps:

(1) power lead of transmitter adopts metal-shielded wire, and it is good reliable that ground connection is wanted.Power supply is direct current 24V, 650 Ω impedances;

(2) the transmitter level of answering is installed, and avoids at right angle setting, and guarantees that there is the straight length of adaptation its front and back, general front 10D, rear 5D;

(3) guarantee that the flow direction of fluid and the direction of arrow of meter case are consistent, must not be anti-loaded;

(4) measured medium can not have corrosion to turbine, bearing place particularly, otherwise should take measures;

(5) note magnetic induction part not collide;

(6) configuration of turbo flow meter and correction.

Claims (5)

1. a turbo flow meter, its composition comprises: housing, it is characterized in that: described housing with leading to frame component, be connected with the magneto-electric induction converter of amplifier, described be leadingly connected with impeller assembly to frame component, described impeller assembly is connected with rear guide frame assembly, and described rear guide frame assembly is connected with compacting ring.

2. turbo flow meter according to claim 1, it is characterized in that: described is leading to frame component, non-magnetic stainless steel or the making of duralumin material for rear guide frame assembly, be arranged on sensor import and export, convection cell plays guiding rectification and supports impeller, avoids the impact of flow disturbance on impeller.

3. turbo flow meter according to claim 1 and 2, is characterized in that: described impeller is led cruel property material by height and made.

4. the fluid measurement method of a turbo flow meter, it is characterized in that: the method comprises the steps: first flow velocity to be converted to the rotating speed of turbine, again rotating speed is converted to the electric signal being directly proportional to flow, for detection of instantaneous delivery and total integrating flow, its output signal is frequency, be easy to digitizing, inductive coil is fixed on housing together with permanent magnet, when ferromagnetism turbo blade process magnet, the magnetic resistance of magnetic circuit changes, thereby generation induced signal, signal amplifies and shaping through amplifier, deliver to counter or frequency meter, show total integrating flow, simultaneously by pulsed frequency through overfrequency-voltage transitions with indication instantaneous delivery.

5. the fluid measurement method of turbo flow meter according to claim 4, is characterized in that: the revolution of described impeller is proportional to the total amount that flows through fluid.

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