CN201359511Y

CN201359511Y - Multiple-ejection co-axial flow meter

Info

Publication number: CN201359511Y
Application number: CNU2009200024496U
Authority: CN
Inventors: 刘晓庆
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-01-15
Filing date: 2009-01-15
Publication date: 2009-12-09
Anticipated expiration: 2019-01-15

Abstract

A multiple-ejection co-axial flow meter is characterized in that the inside of a cavity body of the flow meter is mainly designed into an impeller cavity and an impeller cavity base. The base is a component mainly formed by impurity drainage channels and a metal mesh, the portion between a circumference below a column portion of an upper top circular barrel of the component and a bottom circumference is mainly designed into an elliptic shape, smooth curved surfaces on the left and the right sides of the elliptic shape subject to the symmetrical axis are provided with a plurality of impurity drainage channels, and two sides of the upper surface of the bottom circumference are designed into slop-type crescent curved surfaces. When impurities of circulating media are drained by the drainage channels to the slop-type crescent bottom surfaces after entering into the flow meter, and then are pushed out of the flow meter by the aid of downslide forces of the slopes on the bottom surfaces and impact force of medium flow. When the circulating media flow back due to negative pressure, the impurities in the media are intercepted by the metal mesh inside an L-shaped passage of the impeller cavity base, thereby guaranteeing that the impurities are prevented from entering into the impeller cavity permanently and enabling the flow meter to achieve the purpose of accurate measurement all the time.

Description

The coaxial flowmeter of many injections

Affiliated technical field

The utility model relates to the device of the measurement circulatory mediator flow of mechanical vane type, particularly adapt in China's heat supply circulation system 1. heating network and heat abstractor self easily produce solid deposit seed such as iron rust, particle that 2. artificial origin adds in the heating medium and oily impurity environmental baseline under accurate measurement.

Background technology

As everyone knows, mechanical vane-wheel type flowmeter is flowmeter shell, internal mechanical member--the formation such as-impeller, impeller cavity by the metal quality.Flowmeter is installed in the medium circulation system by water (flow) direction, measured medium enters the flowmeter cavity from inlet end, through flowing out cavity behind the sensing element impeller, finally calculate and demonstrate the quality or the volume of the medium of the flowmeter of flowing through, it can carry out normal gage work if this kind flowmeter is installed under the measured environment of circulatory mediator matter (as Drinking Water or pure water), but relatively poor because of its water quality aspect heat supply---produce relatively poor water quality to mainly contain following two aspect reasons; First human factor, heat supply department for fear of or reduce circulatory mediator and produce the wasteness loss, in water, add such as glass fibre artificially and contain the addle etc. of solid particle and used oil shape; The second, the heat supply circulation system majority of China is to be made of the pig iron heat radiator that common iron pipe and founding technology are made.So at first the fine sand in the heat radiator (in the founding technology remaining during Tuo Shamo sand) can be recycled medium and washes; Secondly after a heating phase finishes, the system's moisture under remaining and oxidation, a lot of iron rust of generation by its inside; Once more, system's raw material band that its web member place is used in installation process and numb base silk also can be recycled under the medium flushing; In addition,, make the medium in the system produce backflow phenomenon because of the negative pressure reason, or the like.Will be stopped up by the solid particle in the system or be twined extremely, thereby influence the accurate measurement of flowmeter or lose the measurement meaning at above-mentioned these kinds situation down-off meter by linear, cotton-shaped impurity.People are in order to address this problem, taked 1. to install dirt removing device additional: so no doubt can stop impurity to enter flowmeter in the front and back end of flowmeter, but the user wants frequent disassembly, cleaning dirt removing device, increase eternal workload to life, 2. one of design has paraboloidal shunting member in the flowmeter cavity, make the impurity that enters in the cavity by paraboloidal parabolic effect and the flowmeter of dishing out: but this parabola not have the parabolic curve fixed, when the flow velocity of circulatory mediator not simultaneously, its parabolic curve is also just different, especially when turbulent phenomenon appears in medium, the impeller cavity that impurity wherein just is easy to enter flowmeter twines impeller extremely, therefore this flowmeter is not still broken away from filtrator, does not fundamentally solve above-mentioned blockage problem.

The utility model content

In order to overcome the disadvantage of existing flowmeter cisco unity malfunction under the ropy environment of measured medium, the utility model provides a kind of coaxial flowmeter that sprays more.Should spray more coaxial flowmeter not only can be under the measured environment of measured medium matter operate as normal, and can be under rugged surroundings such as the measured medium quality is dirty, turbid, mixed, need not add dirt removing device at its entrance end also can operate as normal.

The utility model solve its technical matters just the technical scheme of usefulness be: impeller cavity and an impeller cavity base of in described flowmeter cavity, being designed primarily to the coaxial rotation of injection more than one.Impeller cavity is installed on this impeller cavity base, attach it to again in the flowmeter shell, this moment, 1. this impeller cavity base and flowmeter shell mainly formed the Inlet and outlet water passage that has impurity drainage canal of the horizontal direction of two curved month types, were the curved month type curved surfaces that has ramp type below the drainage canal; 2. this impeller cavity base and impeller cavity form the exhalant canal of two vertical intake tunnels and a L type, these two vertical intake tunnels are vertical separately and be communicated in the Inlet and outlet water passage of a horizontal direction, and the exhalant canal of this L type is connected with the water delivering orifice of flowmeter.

Above-mentioned impeller cavity base is designed primarily to a member that has the wire netting composition of impurity drainage canal and three stainless steel quality, this member is the rotational symmetry type:＜1〉this member upper top branch is the cylinder of a drum shape, be used to connect impeller cavity, and constitute the impeller cavity exhalant canal of a L type with the impeller cavity water outlet end, the circular metal net of a stainless steel quality is installed on the horizontal direction passage in this L type exhalant canal, and the medium that enters impeller cavity flows out flowmeter from this passage;＜2〉the following global design of drum part is two mesh portion and two circumference types that non-mesh portion is formed, be as the criterion with axis of symmetry, this circumference type the left and right sides be the curved month type wire netting that has the stainless steel quality, the non-mesh portion before and after it is designed primarily to the isoceles triangle body.The top margin of triangle body is on axis of symmetry; Two inclined-planes of triangle body have circular arc type, and its inboard flushes with the outside of circumference type outside being attached on the drum.＜3〉bottom integrated of this member also is designed to a circumference type, the equal diameters of its diameter and above-mentioned circumference type, and the upper surface both sides (being as the criterion with axis of symmetry) of this circumference type are for having the curved month type curved surface of ramp type.＜4〉center section of the circumference type of circumference type below the described in the above drum part and bottom is designed primarily to an ellipse, this ellipse is smooth elliptical area near the flowmeter water inlet, has many impurity drainage canals on the smooth surface of its left and right sides (being as the criterion with axis of symmetry).

The impeller cavity base that will have the impurity canal is installed in the flowmeter cavity, and will spray coaxial impeller cavity more and be installed on this impeller cavity base, circulatory mediator and the impurity that wherein contained enter flowmeter from the water inlet of flowmeter, during elliptical area by the impeller cavity support, enter two curved month type horizontal channels simultaneously, (because under the present situation of China's heating, entering with indoor flow rate of water flow is at 0.5-1.5m ²In/h the scope, under this flow velocity, solid particle in the circulation system can roll along the lower surface of system pipeline and side because of the gravity of self) impurity in the medium guides it on semicircle bottom surface that has ramp type in passage into by the drainage function of the inboard drainage canal of passage, by the impulsive force of the sliding force on slope, bottom surface and MEDIA FLOW and be rushed out flowmeter, when the backflow of negative pressure appearance circulatory mediator occurring, impurity in the medium will be by the wire netting in the L type passage on impeller cavity base interception, has so just ensured to advance forever in the impeller cavity not that decon makes flowmeter can reach the purpose of accurate measurement all the time.

The beneficial effects of the utility model are: the front and back end of, spraying coaxial flowmeter need not install additional under the situation of trowel used for plastering device more, both can under the cleaning medium environment, carry out accurate measurement, can under the turbid media environment, accurately measure again, so not only can guarantee normal surveying work, and bring great convenience for routine work, life, saved material resources and labour simultaneously; Two, owing to use this impeller cavity base that has the drainage canal, make a medium part that enters flowmeter flow out flowmeter from the curved month type horizontal channel together with impurity, only some medium enters impeller cavity from the vertical channel that has curved month type stainless steel quality wire netting and promotes wheel rotation, this just makes the rotating speed of flowmeter reduce greatly, therefore under material of the same race, significantly improve the serviceable life of flowmeter.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the front view of impeller cavity base

Fig. 2 is the rear view of impeller cavity base

Fig. 3 is the lateral plan of impeller cavity base

Fig. 4 is the longitudinal diagram of impeller cavity base

Fig. 5 is the vertical view of impeller cavity base

Embodiment

Among the figure, 1, drum type cylinder, 2, the impeller cavity base is near the ellipse curved surface of flowmeter water inlet, 3, circumference type upper surface both sides, impeller cavity base bottom have the curved month type curved surface of ramp type, 4, drainage canal, 5, impurity water delivering orifice, 6, the vertical inlet passage that has curved month type stainless steel quality wire netting, 7, the triangle body of the non-mesh portion of the circumference type below the drum cylinder part, 8, the L type exhalant canal on the impeller cavity base, 9, the wire netting of the round stainless steel quality in the L type exhalant canal on the horizontal direction.

Be installed on the drum type cylinder 1 shown in Figure 1 spraying coaxial impeller cavity more, and they are encapsulated in the flowmeter shell, when circulatory mediator enters flowmeter from the flowmeter water inlet, about ellipse curved surface 2 places enter simultaneously in two curved month type horizontal channels, at this moment the impurity in the circulatory mediator will continue to flow to flowmeter water delivering orifice direction by ellipse curved surface 2 and the curved month type curved surface 3 that has ramp type under the effect of water field force and self gravitation, when the impurity at ellipse curved surface 2 places flows to drainage canal 4 places shown in Figure 3, can be guided on the curved month type curved surface 3 of ramp type by the drainage canal, these impurity final sum circulatory mediators flow out flowmeter from impurity water delivering orifice shown in Figure 35 simultaneously, so clean medium will enter impeller cavity from vertical inlet passage 6 shown in Figure 5 and then promote wheel rotation, send pulse signal to external circuit, the medium in the impeller cavity finally flows out flowmeter by L type exhalant canal 8 places shown in Figure 4; The planar mud of powder that is had in the medium that enters from vertical channel 6 in long operational process is not because of under triangle body shown in Figure 17 special formed can pile up in addition, they will be recycled medium and constantly wash away and ring off, and the main effect of wire netting 9 shown in Figure 2 is that interception circulatory mediator under negative pressure condition flows backwards and enters the impurity that impeller cavity brings.

Claims

1, a kind of coaxial flowmeter that sprays more, comprise the flowmeter shell, water inlet, water delivering orifice, impeller cavity, impeller cavity base and impeller etc., it is characterized in that: the impeller cavity base of described flowmeter is designed primarily to a member that has impurity drainage canal and wire netting composition, the circumference type on this member below the tip circle bucket cylinder part and the centre of bottom circumference type are designed primarily to an ellipse, this ellipse is smooth elliptical area near the flowmeter water inlet, being as the criterion with axis of symmetry has impurity drainage canal on the curved surface of its left and right sides, is designed to have the curved month type curved surface of ramp type below the drainage canal.

2, the coaxial flowmeter that sprays according to claim 1 more, it is characterized in that: the following global design of described impeller cavity base drum cylinder part is by two mesh portion and two circumference types that non-mesh portion is formed, with the be as the criterion left and right sides of this circumference type of axis of symmetry is the curved month type wire netting, and the non-mesh portion before and after it is designed primarily to the isoceles triangle body.

3, the coaxial flowmeter that sprays according to claim 1, it is characterized in that: the upper top branch of impeller cavity base is designed to a drum cylinder body shape more.

4, the coaxial flowmeter that sprays according to claim 1 is characterized in that: be designed to a circular metal net in the L type exhalant canal of impeller cavity base more.