CN201229191Y

CN201229191Y - Spiral flowmeter

Info

Publication number: CN201229191Y
Application number: CNU2008201512539U
Authority: CN
Inventors: 林鸿飞; 徐德; 顾为沪; 丁尔嘉; 张乐群
Original assignee: Shanghai Automation Instrumentation No9 Co Ltd
Current assignee: Shanghai Automation Instrumentation No9 Co Ltd; Shanghai Automation Instrumentation Co Ltd
Priority date: 2008-07-25
Filing date: 2008-07-25
Publication date: 2009-04-29
Anticipated expiration: 2018-07-25

Abstract

The utility model relates to a spiral flow meter, which comprises a casing body, a front and a rear guide frames and a rectifier portion which are arranged in the casing body, and an electromagnetic induction convertor and a metering display device which are mounted on the outer wall of the casing body, wherein a rotary shaft which has the same shaft line with the casing body is arranged between the front guide frame and the rear guide frame, and a rotor is fixedly arranged on the rotary shaft. The utility model is characterized in that the rotor is provided with two longer spiral blades. The spiral flow meter adopts the rotor with the spiral blades, which is suitable for metering crude oil which contains water, sand, polymer and the like and whose weight is heavier and worse, fiber polymer in crude oil can smoothly flow, and the flow meter is not easily blocked. The rotor adopts a hard alloy rotary shaft, which is equipped with a bearing, and is wear-resisting and has long service span. A rectifying element is increased, the metering precision is further improved, and the repeatability is excellent.

Description

A kind of helical flow meter

Technical field

The utility model relates to a kind of flow measurement field, relates in particular to a kind of helical flow meter.

Background technology

Existing flow sensor, as shown in Figure 1: lay a rotor 2 at housing 1 center by forward and backward guide frame 5,6, this rotor 2 is the vane type turbine, it is assemblied on the axle and by bearings.When fluid when the pipeline, the blade 21 of impact rotor 2 produces driving moments to rotor 2, makes rotor 2 overcome friction squares and fluid resistance square and produces rotation.In certain flow range, to certain fluid media (medium) viscosity, the angular velocity of rotation of rotor 2 is directly proportional with rate of flow of fluid.Thus, rate of flow of fluid can obtain by the angular velocity of rotation of rotor 2, thereby can calculate the fluid flow by pipeline.But existing employing vane type turbine has following shortcoming as the flow sensor of rotor: stop up easily, especially be more prone to stop up for the heavier crude oil of quality.Be not suitable for moisture, contain sand, especially contain the heavier crude oil measurements of quality such as polymkeric substance.

The utility model content

The purpose of this utility model be to provide a kind of be fit to moisture, contain sand, the metering, the life-span that contain the heavier crude oil of quality such as polymkeric substance are long, measuring accuracy is high, the helical flow meter of good reproducibility.

The problem that the utility model solved can realize by the following technical solutions:

A kind of helical flow meter, comprise housing and be located at the forward and backward guide frame of enclosure interior and rectifier partly and be installed in magneto-electric induction converter, metering and display device on the housing outer wall, between described forward and backward saddle, be provided with one with the rotating shaft of housing coaxial cable, in rotating shaft, set firmly a rotor, it is characterized in that described rotor is the rotor with spiral blade.

The spiral blade quantity of described rotor is 2.

To be not easy to adhere to dirt on the spiral blade in order making, to influence measuring accuracy, on spiral blade, scribble coating.

In order further to improve measuring accuracy, repeating effect is good, and in described housing, the arranged outside of back guide frame has a rectification part.Described rectification part comprise one and be arranged in the tube and with the rectification nest of tubes of the parallel axes of tube.

The two ends of described rotating shaft, penetrate in the bearing in order to prevent silt on forward and backward guide frame by bearings, have influence on the serviceable life of bearing and rotating shaft, and described rotating shaft and described bearing adopt the rotating shaft and the bearing of wimet.

That the utility model helical flow meter is fit to is moisture, contain sand, contain the heavier crude oil measurement of quality such as polymkeric substance, and the fibre-forming polymer in the crude oil can successfully flow, and flowmeter is not easy to stop up.Rotor adopts wimet rotating shaft, Bearing Installation, and wear-resisting, the life-span is long.Increase the rectification part, further improved measuring accuracy, good reproducibility.

Description of drawings

Fig. 1 is the structural representation of existing flowmeter;

Fig. 2 is the structural representation of the utility model helical flow meter;

Fig. 3 is the structural representation of the rotor of helical flow meter;

Fig. 4 is Fig. 3 side view;

Fig. 5 is the structural representation of rectification part;

Fig. 6 is the vertical view of Fig. 5;

Among the figure: 1-housing, 2-rotor, 21-blade, 2A-rotor, 21A-spiral blade, 3-rotating shaft, 4-bearing, 5-preceding guide frame, 6-back guide frame, 7-rectification part, 71-tube, 72-commutator tube, 8-compacting ring, 9-magneto-electric induction converter, 10-display.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

See also Fig. 2, a kind of helical flow meter, the housing 1 that comprises into tubular, at welding of the two ends of housing 1 and joint flange, forward and backward guide frame 5,6 is installed in housing 1 inside, the medial extremity of forward and backward saddle 5,6 be respectively arranged with one with the bearing 4 of housing 1 coaxial cable, rotating shaft 3 is installed on the bearing 4, the inner ring of bearing 4 and rotating shaft 3 adopt Hardmetal materials to make, can prevent that like this silt in the crude oil from penetrating into bearing 4 interior reaching between bearing 4 and the rotating shaft 3, thereby can improve the serviceable life of bearing 4 and rotating shaft 3.

Rotor 2A is fixed in the rotating shaft 3, rotates synchronously with rotating shaft 3, and referring to Fig. 3 and Fig. 4, rotor 2A is provided with spiral blade 21A, and spiral fashion liquid blade 21A is made by the magnetic stainless steel material, gets 2 spiral fashion liquid blade 21A blades.In order to make rotor 2A good response be arranged, require the quality of rotor 2A as far as possible little to flow velocity.Adopt spiral blade 21A that fluid is derived from flowmeter smoothly.Even for moisture, contain sand or contain the heavier fluid of quality such as polymkeric substance, the fibre-forming polymer in the fluid also can successfully flow, and is not easy to stop up flowmeter.

To be not easy to adhere to dirt on the spiral blade 21A in order making, to influence measuring accuracy, on spiral blade 21A, scribble coating.

Referring to Fig. 2, in housing 1, the outside of back guide frame 6 is equipped with a rectification part 7 by compacting ring 8.Referring to Fig. 8, rectification part 7 comprises one 71 and places

several commutator tubes

72,73 in the tube 71 to form the parallel axes of the axis of

several commutator tubes

72,73 and tube 71.The diameter of commutator tube 72 is big slightly, and the diameter of commutator tube 73 is slightly little, and

several commutator tubes

72,73 constitute the rectification nest of tubes, and commutator tube 73 plays the effect of jam-packed commutator tube 72, adopts the argon arc welding welding between commutator tube 73 and the tube 71.The fluid of surveying is in laminar condition in the time of can guaranteeing measurement flow rate by setting up rectification part 7, improves measurement accuracy, has further improved measuring accuracy.

Magneto-electric induction converter 9 and display 10 are installed on the outer wall of housing 1, and magneto-electric induction converter 9 is connected with the frequency-current conversion circuit that is used to obtain the instantaneous delivery value with the unit conversion that is used to obtain the cumulative flow value and flow accumulation circuit respectively through amplification and rectification circuit.The magneto-electric induction converter is made up of permanent-magnet steel and outside induction coil wound.

Principle of work of the present utility model is as follows:

Fluid promotes rotor 2A and rotates under the effect of oil pump.The rotating speed of rotor 2A detects by the sensing coil that is contained in the magneto-electric induction converter 9 outside the housing 1.When the spiral blade 21A of rotor 2A cutting by housing 1 in during the magnetic line of force of permanent-magnet steel generation, will cause the flux change in the sensing coil.Sensing coil is sent detected magnetic flux cycle variable signal into amplification and rectification circuit, to signal amplify, shaping, produce the pulse signal be directly proportional with flow velocity, send into unit conversion and flow accumulation circuit and obtain and show the cumulative flow value; Simultaneously also pulse signal is sent into frequency-current conversion circuit, convert pulse signal to the analog electrical flow, and then indication instantaneous delivery value.

Ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. helical flow meter, comprise housing and be located at the forward and backward guide frame of enclosure interior and rectifier partly and be installed in magneto-electric induction converter, metering and display device on the housing outer wall, between described forward and backward saddle, be provided with one with the rotating shaft of housing coaxial cable, in rotating shaft, set firmly a rotor, it is characterized in that described rotor is the rotor with spiral blade.

2. a kind of helical flow meter according to claim 1 is characterized in that, the spiral blade quantity of described rotor is 2.

3. a kind of helical flow meter according to claim 1 is characterized in that, scribbles coating on described spiral blade.

4. according to the described a kind of helical flow meter of each claim of claim 1 to 3, it is characterized in that in described housing, the outside of back guide frame respectively is provided with one and constitutes rectifier rectification part partly.

5. a kind of helical flow meter according to claim 4 is characterized in that, described rectification part comprise one and be arranged in the tube and with the rectification nest of tubes of the parallel axes of tube.

6. according to the described a kind of helical flow meter of each claim of claim 1 to 3, it is characterized in that, the two ends of described rotating shaft by bearings on forward and backward guide frame; Described rotating shaft and described bearing adopt the rotating shaft and the bearing of wimet.