CN1758030A

CN1758030A - Rotary flowermeter

Info

Publication number: CN1758030A
Application number: CN 200510103731
Authority: CN
Inventors: M·卡莱菲
Original assignee: Caleffi SpA
Current assignee: Caleffi LLC; Mark Holdings Ltd.; Caleffi SpA
Priority date: 2004-10-08
Filing date: 2005-09-08
Publication date: 2006-04-12
Anticipated expiration: 2025-09-08
Also published as: DE102005040057A1; KR20060051665A; DE202005021625U1; ITMI20041905A1; CN100429487C

Abstract

The invention relates to a flowmeter device, comprising a tubular casing (10). The tubular casing (10) comprises an inlet side (11) for going through a central chamber (13) and an exit end. In the central chamber (13), a fluid actuated magnetic rotor (17) idles to circularly drive a magnetic sensor (16) arranged in a cavum (15). The cavum (15) is arranged on one side of the tubular casing (10). The rotor comprises: an elongated main part outward emanating toward to a fluid egress point; and a columned magnet (18) which polarizes in a shape of radial pattern and has opposite polarities (N, S). A flowdiverter (23) is arranged on intake side of the central chamber (13) to make fluid rotate and support an end axle (20) of the rotor (17). And a rotor spindle (21) on outlet side is supported by a shaft (27). The shaft (27) radially extends in the inner side of the tubular casing (10) of the flowmeter device.

Description

Rotary flowermeter

Technical field

The present invention relates to a kind of rotary flowermeter, be particularly related to a kind of equipment that is used to measure flow or fluid flow, the flowermeter of the type comprises a body, this body is provided with a chamber that is used for magnet rotor, described magnet rotor is dallied by fluid so that respond to the magnetic inductor that electric signal can be provided, described electric signal has the proportional frequency of rotating speed with the number of magnetic poles and the rotor of rotor, and described electric signal depends on the flow that the channel path that comprises above-mentioned chamber in the body of fluid longshore current amount counter device flows.

Background technology

Rotameter widely known to, and be used for for example being used on the little wall mounted gas fired-boiler as heating equipment or other hydraulic pressure purposes, described flowmeter is used to provide the control signal of circulation of fluid or the indication of flow signal.

The example of flowmeter is seen GB-A-1008508, US-A-3878711, and EP-A-1308702, GB2234824 and DE-A-10111993 are described, and they constitute and the immediate prior art of the present invention.

Usually the flowmeter of known type has some complicated structure, is made up of the parts of a plurality of independent manufacturings, and need assembles in turn in body, and limit a stream at an entrance side and an outlet side for fluid.

Magnet rotor or impeller are arranged and rotate freely in the body inboard of equipment; Magnet rotor comprises the wheel hub that has one group of blade substantially, and described blade is by the mobile driven rotary of fluid, the body of described fluid flows amount counter device.

This rotor is provided with a plurality of blades of being made by magnetic material usually, the vertical axis tilt of the relative rotor of described blade, in order to receiving axes to the fluid that flows through flowmeter, as the required thrust of rotation.

Described rotor is also directly or indirectly by being configured to spoke supporter supports in the flowermeter body on entrance side and outlet side.

As a kind of alternative rotor with magnetic blade, the permanent magnet of the one or more radial polarizations of EP1308702 suggestion assembling, they radially are arranged on the T connector on an end of flow admission side at rotor.

This technical scheme not only complex structure causes being worth expensive, and the specialized structure of impeller and general spoke support system and functional character have then related to too much throttling and obstruction, and this throttling has increased the turbulent flow of not expecting again conversely with hindering, and this turbulent flow is tending towards the filiform that clamping impurity and/or fluid are carried secretly; Thereby can negative influence or jeopardize the rotation of impeller and the suitable operation of flowmeter As time goes on.

DE-A-10111993 has described a kind of technical scheme, and its viewpoint is to constitute a kind of improvement, and promptly it has used a rotor with magnetic impeller of flat shape, and this impeller suitably is oriented to the axial of rotor according to the flow direction of fluid; One flow diverter is arranged on the fluid intake side.However, also there are a large amount of previously mentioned defectives in this technical scheme; Particularly, the cylindrical structural of rotor center hub, and as described above on the both sides existence of spoke-like support be tending towards producing the excessive throttling of turbulent flow and convection cell.

At last, in the rotor with magnetic material impeller, this rotor has the electric signal quantity that limited magnetic pole and limited rotor revolution produce, unless use heavier with expensive large-diameter rotor, otherwise only use four radial blades usually.

A small amount of pulse signal of revolution means need make rotor rotate with more speed, so that produce the signal pulse of requirement in the unit interval.

Consider that current trend is to use plastic material to be used for rotor or impeller and each support member more, all these cause the wearing and tearing of back support member in the more wearing and tearing, particularly outlet side, and thereby further cause the damage of flowmeter; In addition, it may cause the frequency of electric signal under the semaphore deficiency under the low slamp value or the slow-speed of revolution and the deficiency of tachometer value.

Summary of the invention

Fundamental purpose of the present invention provides a kind of rotary flowermeter, and it is simple in structure, and cost has substantial degradation, thereby has eliminated the existing defective of known mass flow meter now.

Particularly, an object of the present invention is to provide a kind of flowmeter of aforementioned type, it can provide a kind of big traffic channel that is used for fluid, thereby reduce gathering of possible turbulent factor and impurity, the filiform of described impurity such as fluid carry-over, or the iron rust that breaks away from from pipeline in time, this iron rust is deposited on the blade of rotor in a kind of uncontrollable mode, thereby destroys the stable of blade.

Another purpose of the present invention has provided a kind of flowermeter referring to above, and it has higher reliability in operation, thereby restriction maybe will wear and tear and the possible factor of fault is reduced to minimum value.

A further object of the present invention has provided a kind of flowermeter, and it can supply suitable automatically controlled signal by the solution of a simple cheap, and this flowermeter also is used for the rotor than low discharge and/or revolution.

Flowermeter according to aforementioned type provided by the present invention; the given shape that wherein is used for the rotor that automatically controlled signal generates and the special characteristic of magnet and inductor make flowmeter the turbulent flow of fluid may be reduced to minimum with disposing; and wash away the deposition of resisting impurity continuously, thereby guarantee that magnet has gratifying protection by what make that magnet itself stands fluid.

And, by rotor is adopted specific support system, might be in current-limiting points, particularly consistent with the back support side of rotor place obtains more effective cleaning action, and can make flowmeter be installed in level or upright position.

Foregoing can obtain by rotary flowermeter as claimed in claim 1.

Particularly, according to the present invention, the rotameter of the type that provides comprises:

One limits the body of fluid axial passage, and this axial passage connects central chamber from entrance side to an outlet side;

One magnet rotor that dallies in central chamber, this rotor have a plurality of flat blades that extend in parallel with the rotor longitudinal axis;

One is positioned at the flow diverter on the central chamber entrance side;

Magnetic inductor in the cavity on flowermeter body one side is characterized in that,

This rotor is included in axially extended elongation core element in the central chamber, and this core element is dispersed towards the rear portion of fluid egress point side;

One is arranged on the ring-shaped magnet on the core element rear side, and this ring-shaped magnet has the radially pole surface of location of a plurality of alter polarities;

One is used for the support shank of rotor, and it radially extends in central chamber at fluid outlet.

Description of drawings

According to these and other feature of flowermeter of the present invention and advantage from hereinafter to the description of one of preferred embodiment and in conjunction with the accompanying drawings can be clearer, wherein:

Fig. 1 shows the skeleton view of the flowmeter of removing the part body;

Fig. 2 shows sectional side elevation;

Fig. 3 shows the cross-sectional figure along 3-3 line among Fig. 2;

Fig. 4 shows the view of rotor;

Fig. 5 shows the view of flow diverter.

Embodiment

As Figure 1-3, flowmeter comprises one by the molded body that forms 10 of plastic material, and this body 10 has a fluid inlet end 11 and a fluid endpiece 12, and fluid outlet 12 and inlet end 11 are relative and axially align.

This body 10 limits a central chamber 13, and magnet rotor 14 idle running are supported in the central chamber 13 of body 10.Label 15 among several figure also is used to represent to hold the side chamber of an electromagnetic inductor 16, and described side chamber for example is " Room " type indicator (probe), and above-mentioned electromagnetic inductor 16 stands the magnetic field that generated by the rotation of magnet rotor 14; The chamber 15 that is used to hold inductor and body 10 tangent settings and extend on the side longitudinally at the rotation of rotor 14, its extension width is greater than the width of ring-shaped magnet 18.

As showing in greater detail among Fig. 4, rotor 14 comprises elongation core element 17 and one group of radial blade 22; Core element 17 is roughly taper shape, and it is dispersed towards ring-shaped magnet 18 in the outflow direction of fluid; Magnet 18 radially polarizes, so that produce a plurality of magnetic poles at its outer surface, and six pole surfaces for example, they alternately have relative N and S polarity.

Example according to Fig. 4, the core element 17 relative fluid flow directions of rotor, the anterior column part 17A and one that comprises relative minor diameter disperses the middle circle wimble fraction 17B until a hub portion 19 gradually, and this tapered segment 17B ends at has the diameter that roughly equates with ring-shaped magnet 18 external diameters.Like this; front surface by the magnet 18 of the rear end of core element 17 protection can not be exposed to fluid; and the outside surface of this magnet is flowed by fluid and pats effectively and flushing continuously, thereby helps to remove the filiform that may be carried secretly by magnet and any deposition of impurity, and keeps clean.

It shall yet further be noted that according to flowmeter of the present invention and can install in horizontal or vertical position; In addition, the weight of rotor 14 has advantage, because unlike the magnetic vane type, cylindric magnet 18 has littler diameter; Therefore whole rotor 14 stands lower centrifugal force, has advantage when the flow of streaming flow changes on adaptability and susceptibility.

The two ends of core element 17 are respectively arranged with rotating

shaft

20 and 21.

Rotor 14 also comprises a plurality of flat blades 22, and the quantity of flat blade 22 does not depend on the quantity of the N utmost point and the S utmost point of magnet 18, and four magnetic poles are for example arranged among the figure, and their longitudinal extensions also pass the turning axle of rotor in sagittal plane.Blade 22 extends near the intermediate point place from the forward terminal near central cores 17, and stops with the sloping edge of the interior shape that meets body 10.

In the fluid intake side, at the front end of central chamber 13, a flow diverter is set, this flow diverter is designed to guide the lateral fluid of steadily coming in to flow, so impel the blade 22 that produces rotation and impact rotor, forces the latter to rotate.

This flow diverter roughly is included in a ring-type element 23 that holds in the appropriate location in the inlet 11; This ring-type element 23 is provided with a plurality of inner stators 24, and they tilt angularly at interval and with same direction; Best, being used to make the stator 24 of deflect flow is that spirality and quantity do not wait, for example can be than spinner blade 22 more.

Hollow hub 25 is adjoined at stator 24 centers, and this hollow hub 25 runs through the front axle 20 of rotor.On the opposite side of rotor, axle 21 penetrates in second hollow hub 26 that is arranged on support shank 27 ends, and this support shank 27 is radially dangled in the central chamber 13 of rotor; Like this, enough sectional areas that this support shank 27 not only can keep the fluid on the outlet side to flow, and reduced substantially and form the possible factor of eddy current, and reduced the possible factor that the formation of the impurity of fluid carry-over is gathered.In addition, the conical shaped shape of rotor central cores 17, this taper shape is dispersed on the equidirectional that fluid flows, and the flat shape that is combined with blade 22 disposes with vertical, and lacking the front end face that magnet 18 contacts with fluid, this has greatly reduced the possible factor that acts on epitrochanterian axial thrust and armature spindle wearing and tearing; Rotor structure thereby can keep well stable.

Above description and the demonstration of accompanying drawing, the flowermeter that is provided has and can obtain required improved character of innovation obviously; And be appreciated that to body, rotor, flow diverter and be used for rotor itself support system modification with change the scope can not depart from claim.

Claims

1, a kind of rotameter comprises:

One limits the body (16) of fluid axial passage, and this axial passage connects a central chamber (13) from an entrance side (11) to an outlet side (12);

The magnet rotor (14) of one idle running in central chamber (13), this rotor (14) have a plurality of flat blades (22) that extend in parallel with rotor (14) longitudinal axis;

One is positioned at the flow diverter (23,24) on the entrance side (11) of central chamber (13); With

Magnetic inductor (16) in the cavity (15) on body (10) one sides of flowermeter; It is characterized in that,

This rotor (14) is included in axially extended elongation core element (17) in the central chamber (13), and this core element (17) is dispersed to the rear portion towards fluid egress point side (12);

One is arranged on the ring-shaped magnet (18) on core element (17) rear side, and this ring-shaped magnet (18) has a plurality of alter polarity (N; S) the radially pole surface of location; With

One is used for the support shank (27) of rotor (14), and it is in fluid egress point side (12), radially extension in central chamber (13).

2, rotameter as claimed in claim 1 is characterized in that, this magnetic inductor (16) constitutes a Room type indicator.

3, rotameter as claimed in claim 1 is characterized in that, the core element of rotor (17) comprises the corresponding to rear portion of outer dia that has with ring-shaped magnet (18).

4, rotameter as claimed in claim 1 is characterized in that, (N, quantity S) is greater than the quantity of spinner blade (22) for the pole surface of magnet (18).

5, rotameter as claimed in claim 1 is characterized in that, stator (24) quantity of flow diverter (23,24) is different with the quantity of spinner blade (22).

6, rotameter as claimed in claim 1 is characterized in that, stator (24) quantity of flow diverter (23,24) is greater than the quantity of spinner blade (22).

7, rotameter as claimed in claim 1 is characterized in that, the stator (24) of flow diverter (23,24) is a spirality.

8, rotameter as claimed in claim 1 is characterized in that, the chamber (15) that holds inductor (16) tangentially is arranged on the body of locating near the ring-shaped magnet (18) of rotor (14) (10).

9, rotameter as claimed in claim 8 is characterized in that, holds the chamber (15) of inductor (16) and extends on the width of width greater than ring-shaped magnet (18).