CN203719699U - Flow sensing device for pipeline monitoring - Google Patents
Flow sensing device for pipeline monitoring Download PDFInfo
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- CN203719699U CN203719699U CN201420084276.8U CN201420084276U CN203719699U CN 203719699 U CN203719699 U CN 203719699U CN 201420084276 U CN201420084276 U CN 201420084276U CN 203719699 U CN203719699 U CN 203719699U
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- frictional layer
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Abstract
The utility model discloses a flow sensing device for pipeline monitoring, and aims at solving the problem of limitation to an application range, which is caused by the shortcomings of complicated structure, high manufacturing cost and the like of the conventional flowmeter. The flow sensing device comprises a target, a first group of friction type flow sensors and a connection rod, wherein the target is positioned in a monitored pipeline and generates a first displacement when fluid passes through the pipeline; the connection rod is configured to penetrate through a first opening hole in the pipeline and is fixedly connected with the target; the first group of friction type flow sensors are positioned outside the pipeline and comprise first friction layers which are fixedly connected with the connection rod and generate a second displacement corresponding to the first displacement under the driving of the connection rod, and second friction layers which are fixed outside the pipeline and are opposite to the first side surfaces of the first friction layers; furthermore, a distance between the second friction layers and the first friction layers is smaller than a displacement value of the second displacement.
Description
Technical field
The utility model relates to pipeline monitoring field, is specifically related to a kind of flow sensor for pipeline monitoring.
Background technology
Pipeline is widely used in daily life, can be used for the fluid of transmission including all kinds of liquids and gases.For example, need to carry with medical infusion pipeline each class I liquid Is such as physiological saline, blood or insulin for patient at medical field.And, in the several scenes such as heating, fuel feeding, air feed, also all need to transmit all kinds of fluids with pipeline.
In above-mentioned application scenarios, often need to carry out sensing to the flow information of the fluid in pipeline, whether normal to determine flowing of pipeline inner fluid.In the prior art, to achieve these goals, often need to adopt special flowmeter to carry out sensing.Although flowmeter can sense the flow information of fluid,, due to the defect such as flowmeter structure complexity, cost be high, cause range of application very limited.
Utility model content
The utility model provides a kind of flow sensor for pipeline monitoring, for solving existing flowmeter due to defects such as complex structure, cost are high, and causes the limited problem of range of application.
For a flow sensor for pipeline monitoring, comprising: target, first group of friction-type flow sensor and connecting link; Wherein, described target is positioned at monitored pipe interior, its in described pipeline, have fluid by time produce the first displacement; Described connecting link is set to be fixedly connected with through the first perforate on described pipeline and with described target; Described first group of friction-type flow sensor is positioned at described pipeline external, comprising: the first frictional layer, and described the first frictional layer is fixedly connected with described connecting link, and produces second displacement corresponding with described the first displacement under the drive of described connecting link; The second frictional layer, described the second frictional layer is fixed on described pipeline external, and the first side surface of itself and described the first frictional layer is oppositely arranged, and the distance between described the second frictional layer and described the first frictional layer is less than the displacement of described the second displacement.
Alternatively, the first side surface of described target is vertical with the flow direction of the fluid in described pipeline, or the flow direction of the fluid in the first side surface and the described pipeline of described target is 30 ° of-60 ° of settings.
Alternatively, this flow sensor further comprises: connect the position limiting structure of described pipeline and described connecting link, described connecting link is suspended in pipe interior by described position limiting structure, and can be movable in described pipeline.
Alternatively, this flow sensor further comprises: be fixed on the arc substrate of described pipeline external, described the second frictional layer is fixed on described pipeline external by described arc substrate; On described arc substrate, the position of corresponding described the first perforate is provided with the second perforate, described connecting link connects described target and the first frictional layer through described the first perforate and the second perforate, wherein, described position limiting structure connects described pipeline and described connecting link by described arc substrate.
Alternatively, described position limiting structure is leverage, and described connecting link can swing along the flow direction of described fluid at pipe interior taking described leverage as fulcrum.
Alternatively, between described the first perforate or described the second perforate and described connecting link, be further provided with elastic seal ring.
Alternatively, described position limiting structure is revolute pair, and described connecting link can rotate at pipe interior by described revolute pair.
Alternatively, this flow sensor further comprises: second group of friction-type flow sensor, described second group of friction-type flow sensor comprises the 3rd frictional layer and described the first frictional layer that are fixed on described pipeline external, the second side surface of described the 3rd frictional layer and described the first frictional layer is oppositely arranged, and the distance between described the 3rd frictional layer and described the first frictional layer is less than the displacement of described the second displacement.
Alternatively, between described first group of friction-type flow sensor and described second group of friction-type flow sensor, after mutual series connection, the electric signal process unit external with is connected; Or, parallel with one another between described first group of friction sensor and described second group of friction sensor after the electric signal process unit external be connected; Or described first group of friction sensor and described second group of friction sensor respectively electric signal process unit external with two are connected.
Alternatively, this flow sensor further comprises: the alarm being connected with described electric signal process unit.
Alternatively, described first group of friction-type flow sensor is three-decker, four-layer structure or five-layer structure, and this group friction-type flow sensor at least comprises two opposite faces that form frictional interface; And/or described second group of friction-type flow sensor is three-decker, four-layer structure or five-layer structure, and this group friction-type flow sensor at least comprises two opposite faces that form frictional interface.
Alternatively, at least one face in described frictional interface is provided with micro-nano structure.
In the flow sensor providing at the utility model, first, in the time having fluid to pass through in pipeline, under the effect of the impulsive force producing in the time that fluid flows, the target that is arranged on pipe interior will produce displacement; Then, under the gearing of connecting link, the displacement that the first frictional layer also will produce and target is corresponding that is arranged on pipeline external and is fixedly connected with target by connecting link, and then be in contact with one another and rub with the second frictional layer.As can be seen here, in said process, the friction-type flow sensor that causes being made up of the first frictional layer and the second frictional layer is produced electric signal by flowing of fluid.In the time that fluid flow is large or flow velocity is fast, this electric signal is stronger; And when the little or flow velocity time slack of fluid flow, this electric signal a little less than.Therefore the electric signal, producing by friction-type flow sensor just can accurately reflect the fluid mobility status of pipe interior.This flow sensor has the many advantages such as precision is high, simple in structure and with low cost, can be widely used in all kinds of scenes.
Brief description of the drawings
Fig. 1 shows the structural representation of the flow sensor for pipeline monitoring that the utility model provides;
Fig. 2 a shows the inner structure schematic diagram of the flow sensor that the utility model embodiment mono-provides;
Fig. 2 b shows the external structure schematic diagram of the flow sensor that the utility model embodiment mono-provides;
Fig. 2 c shows the horizontal section schematic diagram of the flow sensor that the utility model embodiment mono-provides;
Fig. 2 d shows the longitudinal profile schematic diagram of the flow sensor that the utility model embodiment mono-provides;
Fig. 3 a shows the inner structure schematic diagram of the flow sensor that the utility model embodiment bis-provides;
Fig. 3 b shows the external structure schematic diagram of the flow sensor that the utility model embodiment bis-provides;
Fig. 3 c shows the horizontal section schematic diagram of the flow sensor that the utility model embodiment bis-provides;
Fig. 3 d shows the longitudinal profile schematic diagram of the flow sensor that the utility model embodiment bis-provides;
Fig. 4 a shows the inner structure schematic diagram of the flow sensor that the utility model embodiment tri-provides;
Fig. 4 b shows the external structure schematic diagram of the flow sensor that the utility model embodiment tri-provides;
Fig. 4 c shows the horizontal section schematic diagram of the flow sensor that the utility model embodiment tri-provides;
Fig. 4 d shows the vertical view of the flow sensor that the utility model embodiment tri-provides;
Fig. 4 e shows the longitudinal profile schematic diagram of the flow sensor that the utility model embodiment tri-provides;
Fig. 5 a shows the horizontal section schematic diagram of the flow sensor while being provided with the 3rd frictional layer;
Fig. 5 b shows the longitudinal profile schematic diagram of the flow sensor while being provided with the 3rd frictional layer;
Fig. 6 a shows a water and drips the voltage responsive producing while acting on target;
Fig. 6 b shows the voltage responsive producing when continuous water droplet acts on target;
Fig. 6 c shows the voltage responsive that continuous flow action produces on target time.
Embodiment
For fully understanding object, feature and effect of the utility model, by following concrete embodiment, the utility model is elaborated, but the utility model is not restricted to this.
In order to solve existing flowmeter due to defects such as complex structure, cost are high, and cause the limited problem of range of application, the utility model provides a kind of flow sensor for pipeline monitoring.
Fig. 1 shows the structural representation of the flow sensor for pipeline monitoring that the utility model provides, and as shown in Figure 1, this flow sensor comprises: target 11, first group of friction-type flow sensor and connecting link 13.Wherein, target 11 is positioned at monitored pipe interior, its in pipeline, have fluid by time produce the first displacement; Connecting link 13 is set to be fixedly connected with through the first perforate on pipeline and with target 11; First group of friction-type flow sensor is positioned at pipeline external, and, this first group of friction-type flow sensor comprises: the first frictional layer 12, and this first frictional layer 12 is fixedly connected with connecting link 13, and produces second displacement corresponding with above-mentioned the first displacement under the drive of connecting link 13; The second frictional layer 14, this second frictional layer 14 is fixed on pipeline external, and the first side surface of itself and the first frictional layer 12 is oppositely arranged, and the distance between the second frictional layer 14 and the first frictional layer 12 is less than the displacement of above-mentioned the second displacement.
In the flow sensor providing at the utility model, first, in the time having fluid to pass through in pipeline, under the effect of the impulsive force producing in the time that fluid flows, the target that is arranged on pipe interior will produce displacement; Then, under the gearing of connecting link, the displacement that the first frictional layer also will produce and target is corresponding that is arranged on pipeline external and is fixedly connected with target by connecting link, and then be in contact with one another and rub with the second frictional layer.As can be seen here, in said process, the friction-type flow sensor that causes being made up of the first frictional layer and the second frictional layer is produced electric signal by flowing of fluid.In the time that fluid flow is large or flow velocity is fast, this electric signal is stronger; And when the little or flow velocity time slack of fluid flow, this electric signal a little less than.Therefore the electric signal, producing by friction-type flow sensor just can accurately reflect the fluid mobility status of pipe interior.This flow sensor has the many advantages such as precision is high, simple in structure and with low cost, can be widely used in all kinds of scenes.
Introduce in detail below by several specific embodiments the flow sensor for pipeline monitoring that the utility model provides:
Embodiment mono-,
Fig. 2 a shows the inner structure schematic diagram of the flow sensor that the utility model embodiment mono-provides; Fig. 2 b shows the external structure schematic diagram of the flow sensor that the utility model embodiment mono-provides; Fig. 2 c shows the horizontal section schematic diagram of the flow sensor that the utility model embodiment mono-provides; Fig. 2 d shows the longitudinal profile schematic diagram of the flow sensor that the utility model embodiment mono-provides.As shown in Fig. 2 a to Fig. 2 d, this flow sensor at least comprises: arc substrate 20, the second frictional layer 21, connecting link 22, target 23 and the first frictional layer 24.Wherein, the second frictional layer 21 and first group of friction-type flow sensor of the first frictional layer 24 common formations.And this flow sensor is applied on pipeline 10, pipeline 10 can dock with other pipelines by the screw thread at two ends, with the length of expansion line, is also convenient to dismantle this flow sensor simultaneously.
Wherein, arc substrate 20 is fixed on the outside of pipeline 10, for supporting the remaining part of this flow sensor.Preferably, the radian of arc substrate is consistent with the radian of pipeline, so that the fixed form of arc substrate is more solid and reliable.
The second frictional layer 21 is fixed on arc substrate 20 by fixed part.This fixed part can be both fixed bar, can be also spring lever.Preferably, the second frictional layer 21 is fixed on arc substrate 20, like this by spring lever, in the time that the second frictional layer 21 is subject to the friction of the first frictional layer 24, to tremble with spring lever, and then with the first frictional layer, friction more significantly occur, promote thus the sensitivity of sensing device.In addition, the first side surface of the second frictional layer 21 and the first frictional layer 24 is oppositely arranged, preferably, in the time of original state, the second frictional layer 21 and the first frictional layer 24 are parallel to each other, and the distance between the two is less, can effectively contacts and rub with the second frictional layer 21 when guaranteeing that the first frictional layer 24 produces displacement under the drive of connecting link 22.For example, the distance between the second frictional layer 21 and the first frictional layer 24 can be less than the displacement that the first frictional layer 24 produces under the drive of connecting link 22.
In addition, on arc substrate 20, be provided with the perforate (corresponding position of pipeline 10 also correspondence is provided with perforate) for therefrom passing for connecting link 22.The first end of connecting link 22 is positioned at pipe interior, and is connected with target 23; The second end of connecting link 22 is positioned at pipeline external, and is connected with the first frictional layer 24.Wherein, the internal diameter of above-mentioned perforate is greater than connecting link 22 and is positioned at the external diameter of the part of perforate, so that connecting link 22 can freely swing in perforate.
In said structure, for the target 23 that makes to be connected with connecting link 22 can be suspended in pipe interior, can also be provided for the position limiting structure of connecting tube 10 and connecting link 22, to carry out spacing to connecting link, make connecting link be positioned at the consistent length of part of pipe interior constant, correspondingly, make connecting link be positioned at the length of part of pipeline external also invariable.As can be seen here, the privileged site of connecting link (middle part) is limited to above-mentioned tapping by this position limiting structure for example.In other words, this connecting link is suspended in pipe interior by position limiting structure, and can be movable in pipeline taking position limiting structure as fixed point.
The implementation of above-mentioned position limiting structure is varied, as long as can realize above-mentioned purpose, the utility model does not limit the specific implementation of position limiting structure.For the ease of understanding, provide the exemplary implementation of one of position limiting structure below.For example, as shown in Figure 2 a, this position limiting structure can be by being arranged on the inside of connecting link middle part and the through hole (not shown) that cross section is " X " shape; And realize through this through hole the support bar 25 that is fixed by arc substrate.Particularly, support bar 25 is used for connecting link to carry out spacing, prevent that it from moving up and down, the through hole of " X " shape is used for guaranteeing that connecting link has certain activity space in same level, that is: in perforate, freely swing, thereby can, in the time that target is subjected to displacement, drive the first frictional layer that the displacement corresponding with target occurs by swing.
Except above-mentioned implementation, this position limiting structure also can be directly by connecting link is positioned at the external diameter at the position of tapping arrange be less than other positions external diameter realize, in other words, the external diameter that connecting link is positioned at the position of tapping is less than the internal diameter of perforate, and the external diameter at other positions of connecting link is greater than the internal diameter of perforate, thereby can either prevent that connecting link from moving up and down, can make again connecting link freely swing.In other words, this position limiting structure is leverage, and connecting link can swing along the flow direction of fluid at pipe interior taking this leverage as fulcrum.
Further, in order to prevent that fluid from overflowing in the space between perforate and connecting link, can also be further between perforate (comprising perforate on arc substrate and/or the perforate of pipeline corresponding position) and connecting link 22, elastic seal ring 26 be set.Can find out from Fig. 2 a to Fig. 2 d, in embodiment mono-, the first side surface of target 23 is vertical with the flow direction of the fluid in pipeline.Now, no matter pipeline is vertical placement or horizontal positioned, and the fluid that its inside is flow through all, by target being produced to vertical impulsive force, impels target to be subjected to displacement.
Introduce the principle of work of above-mentioned flow sensor below: first, in the time having fluid to pass through in pipeline, suppose that the flow direction of fluid is for flowing through from left to right, now, the first side surface of fluid impact target 23 (being left-hand face); Then, target 23 is subjected to displacement under the effect of fluid impact power, particularly, target 23 moves to the right, meanwhile, connecting link 22 swings under the drive of target 23 in perforate, because the sense of displacement of target 23 is to the right, therefore the first end of connecting link 22 also swings to the right thereupon, drive the second end of connecting link 22 correspondingly to swing left simultaneously, and then impel the first frictional layer 24 also to swing left thereupon, thus come in contact and rub with the second frictional layer 21, between the first frictional layer and the second frictional layer, produce electric charge thus.
As can be seen here, in said process, carry out interim feed flow in pipeline time, target is all by generation displacement and impel the first frictional layer and the second frictional layer phase mutual friction induce electric charge.For example, when pipeline is vertically placed, and while carrying out feed flow in drop mode, in the time that a drop of liquid drops onto on target 23, all will impel target 23 to move down, and then make the first frictional layer and the second frictional layer phase mutual friction and induce electric charge; And after liquid runs down target falls, thereby target 23 again by move and return to initial position.In said process, the size of the quantity of electric charge can reflect the weight of liquid: liquid is heavier, and the fricative quantity of electric charge is larger, otherwise the fricative quantity of electric charge is less.In addition, by the number of times that produces electric charge is counted to the quantity that can also determine drop.Except being applied to above-mentioned drip feed flow, this flow sensor is also specially adapted to pulsed feed flow (being also batch (-type) feed flow), for example, in the time of insulin injection, 1 second of 1 second intermittently after 1 second of every injection, and then injection often, then 1 second intermittently again.For example, suppose that pipe level places, and while carrying out feed flow with pulse mode, in the time that one flow is crossed and impact target 23, all will impel target 23 to move along flow direction, and then make the first frictional layer and the second frictional layer phase mutual friction and induce electric charge; And flow through after target when liquid, target 23 will return to again initial position.In said process, can determine by the size of the quantity of electric charge weight and the flow velocity of drop; Can produce the frequency of electric charge or number of times and determine by record frequency and the quantity of drop; Can determine by recording the time period of continuous charge generation feed flow time and the non-feed flow time of pulsed feed flow.Fig. 6 a to Fig. 6 c shows in experimentation, the variation oscillogram of voltage under different feed flow form within the regular hour.Wherein, Fig. 6 a shows a water and drips the voltage responsive producing when (often dripping and being about 0.05ml in this experiment, water droplet starting point is 3cm apart from the distance of target) acts on target, is shown as at 0.7s place in figure, water droplet has dropped on target 23, has produced the voltage responsive of about 400mV; Fig. 6 b shows the voltage responsive producing when continuous water droplet acts on target, is shown as to have a water droplet every 0.2s and drop on target in figure, produces the voltage responsive of about 300-350mV; Fig. 6 c shows the voltage responsive that continuous flow action produces on target time, is shown as in figure within the time of 0-1.8s, has continuous flow action on target, produce the voltage responsive of continuous approximately 300mV, within the 1.8-3.0s time, current stop, and voltage responsive disappears.
Embodiment bis-,
Fig. 3 a shows the inner structure schematic diagram of the flow sensor that the utility model embodiment bis-provides; Fig. 3 b shows the external structure schematic diagram of the flow sensor that the utility model embodiment bis-provides; Fig. 3 c shows the horizontal section schematic diagram of the flow sensor that the utility model embodiment bis-provides; Fig. 3 d shows the longitudinal profile schematic diagram of the flow sensor that the utility model embodiment bis-provides.As shown in Fig. 3 a to Fig. 3 d, this flow sensor at least comprises: arc substrate 30, the second frictional layer 31, connecting link 32, target 33 and the first frictional layer 34.
Wherein, arc substrate 30 is fixed on the outside of pipeline 10, for supporting the remaining part of this flow sensor.Preferably, the radian of arc substrate is consistent with the radian of pipeline, so that the fixed form of arc substrate is more solid and reliable.
The second frictional layer 31 is fixed on arc substrate 30 by fixed part.This fixed part can be both fixed bar, can be also spring lever.Preferably, the second frictional layer 31 is fixed on arc substrate 30, like this by spring lever, in the time that the second frictional layer 31 is subject to the friction of the first frictional layer 34, to tremble with spring lever, and then with the first frictional layer, friction more significantly occur, promote thus the sensitivity of sensing device.In addition, the first side surface of the second frictional layer 31 and the first frictional layer 34 is oppositely arranged, preferably, in the time of original state, the second frictional layer 31 and the first frictional layer 34 are parallel to each other, and the distance between the two is less, can effectively contacts and rub with the second frictional layer 31 when guaranteeing that the first frictional layer 34 produces displacement under the drive of connecting link 32.For example, the distance between the second frictional layer 31 and the first frictional layer 34 can be less than the displacement that the first frictional layer 34 produces under the drive of connecting link 32.
In addition, on arc substrate 30, be provided with the perforate (corresponding position of pipeline 10 also correspondence is provided with perforate) for therefrom passing for connecting link 32.The first end of connecting link 32 is positioned at pipe interior, and is connected with target 33; The second end of connecting link 32 is positioned at pipeline external, and is connected with the first frictional layer 34.Wherein, by the position limiting structure in embodiment mono-, (this position limiting structure comprises and is arranged on the through hole that the inside of connecting link middle part and cross section are " X " shape connecting link 32; And realize through this through hole the support bar 35 that is fixed by arc substrate) carry out spacing and can in perforate, freely swing.Now, in order to prevent that fluid from overflowing in the space between perforate and connecting link, can also further between perforate and connecting link 32, elastic seal ring 36 be set.Can find out from Fig. 3 a to Fig. 3 d, in embodiment bis-, the flow direction of the fluid in the first side surface and the pipeline of target 33 is certain inclination angle.This inclination angle can be for example the inclination angle between 30 degree to 90 degree, and preferably, the angular range at this inclination angle is between 30 degree to 60 degree.Now, no matter pipeline is vertical placement or horizontal positioned, and the fluid that its inside is flow through all, by target being produced to the impulsive force tilting, impels target to be subjected to displacement.
As can be seen here, embodiment bis-is with the key distinction of embodiment mono-: the flow direction of the fluid in the first side surface and the pipeline of target 33 is certain inclination angle (and non-perpendicular).The benefit of design is like this: after fluid drips is fallen on the first side surface of target, can flow away very soon along the angle of inclination of the first side surface, can on the first side surface, not produce hydrops, thereby improve the sensitivity of sensing device.
The principle of work of the flow sensor in embodiment bis-and embodiment mono-are similar, repeat no more herein.
Embodiment tri-,
Fig. 4 a shows the inner structure schematic diagram of the flow sensor that the utility model embodiment tri-provides; Fig. 4 b shows the external structure schematic diagram of the flow sensor that the utility model embodiment tri-provides; Fig. 4 c shows the side view of the flow sensor that the utility model embodiment tri-provides; Fig. 4 d shows the vertical view of the flow sensor that the utility model embodiment tri-provides; Fig. 4 e shows the longitudinal profile schematic diagram of the flow sensor that the utility model embodiment tri-provides.As shown in Fig. 4 a to Fig. 4 e, this flow sensor at least comprises: revolute pair 40, the second frictional layer 41, connecting link 42, target 43 and the first frictional layer 44.
Wherein, the second frictional layer 41 is fixed on pipeline 10 by fixed part.This fixed part can be both fixed bar, can be also spring lever.Preferably, the second frictional layer 41 is fixed on pipeline 10, like this by spring lever, in the time that the second frictional layer 41 is subject to the friction of the first frictional layer 44, to tremble with spring lever, and then with the first frictional layer, friction more significantly occur, promote thus the sensitivity of sensing device.In addition, the first side surface of the second frictional layer 41 and the first frictional layer 44 is oppositely arranged, preferably, in the time of original state, the second frictional layer 41 and the first frictional layer 44 are parallel to each other, and the distance between the two is less, can effectively contacts and rub with the second frictional layer 41 when guaranteeing that the first frictional layer 44 produces displacement under the drive of connecting link 42.For example, the distance between the second frictional layer 41 and the first frictional layer 44 can be less than the displacement that the first frictional layer 44 produces under the drive of connecting link 42.
Revolute pair 40 is fixed on the outside of pipeline 10, and pipeline 10 is provided with perforate on the position corresponding with revolute pair 40, passes for connecting link 42.Connecting link 42 connects target and the first frictional layer through the perforate on revolute pair 40 and pipeline 10.Particularly, the first end of connecting link 42 is positioned at pipe interior, and is connected with target 43; The second end of connecting link 42 is positioned at pipeline external, and is connected with the first frictional layer 44.Wherein, the internal diameter of above-mentioned perforate is slightly larger than or is approximately equal to the external diameter of connecting link 42, so that connecting link 42 can rotate freely by revolute pair 40 in perforate.Can find out from Fig. 4 a to Fig. 4 d, in embodiment tri-, the first side surface of target 23 is vertical with the flow direction of the fluid in pipeline.
As can be seen here, embodiment tri-is with the key distinction of embodiment mono-, two: because position limiting structure is revolute pair, therefore, connecting link 42 cannot freely swing as in embodiment mono-, two in perforate.In embodiment tri-, in the time having fluid to flow through, will impact the first side surface of target, and impel target to rotate displacement around connecting link 42, correspondingly, connecting link 42 also will be rotated in perforate, to drive the first frictional layer on it to rotate displacement.Further, a return unit can also be set in the inside of revolute pair 40, in the time that the impulsive force of fluid disappears, the first frictional layer of connecting link and upper setting thereof and target be resetted.In the present embodiment, the first side surface of target direction mobile with fluid can vertically also can be the setting of 30-90 degree, preferably 30-60 degree.
Introduce the principle of work of above-mentioned flow sensor below: first, in the time having fluid to pass through in pipeline, suppose that the flow direction of fluid is for flowing through from left to right, now, the first side surface of fluid impact target 43 (being left-hand face); Then, target 43 is subjected to displacement under the effect of fluid impact power, particularly, target 43 rotates to the right around connecting link 42, and meanwhile, connecting link 42 rotates under the drive of target 43 in above-mentioned perforate, drive the second end of connecting link 42 correspondingly to rotate simultaneously, and then impel the first frictional layer 44 also thereupon to right rotation, thus come in contact and rub with the first frictional layer 41, between the first frictional layer and the second frictional layer, produce electric charge thus.
In sum, three above-mentioned embodiment can both be applicable to the sensing of interim feed flow.In addition, in three above-mentioned embodiment, can also further at pipeline external, the 3rd frictional layer be set, as shown in Fig. 5 a and Fig. 5 b.The second side surface of the 3rd frictional layer and the first frictional layer is oppositely arranged, and, displacement when distance between the 3rd frictional layer and the first frictional layer is less than the displacement that the first frictional layer produces under the drive of connecting link and target is corresponding, to guarantee in the time that the first frictional layer is subjected to displacement, the second frictional layer and the 3rd frictional layer can rub simultaneously.Now, the first frictional layer and the 3rd frictional layer are as second group of friction-type flow sensor.Therefore, in the structure shown in Fig. 5 a and Fig. 5 b, have two groups of friction-type flow sensors, for convenience, being first group of friction-type flow sensor by the scales being made up of the first frictional layer and the second frictional layer, is second group of friction-type flow sensor by the scales being made up of the first frictional layer and the 3rd frictional layer.Wherein, after mutually connecting between first group of friction-type flow sensor and second group of friction-type flow sensor, the electric signal process unit external with is connected, to measure the electric signal after series connection, because series connection can increase Voltage-output, therefore, this mode is applicable to the scene of measurement voltage signal; Or, after parallel with one another between first group of friction-type flow sensor and second group of friction-type flow sensor, the electric signal process unit external with is connected, so that the electric signal after measurement parallel connection, because parallel connection can increase electric current output, therefore, this mode is applicable to measure the scene of current signal; Or, first group of friction-type flow sensor and second group of friction-type flow sensor independently use separately, and the electric signal process unit external with two is connected respectively, the Output rusults of comprehensive two electric signal process units can multianalysis fluid mobility status, and detect the anelasticity of fluid on target.
In addition, in some specific applied environments, such as medical infusion etc., an alarm also can be set on the basis of embodiment mono-, two, three again, this alarm can directly be connected with one group or two groups of friction-type flow sensors, or, in the time being provided with electric signal process unit, also can directly be connected with electric signal process unit, to report to the police in the time that the electric signal monitoring is abnormal.
Introduce the material of the part parts that relate in above-mentioned three embodiment below:
Wherein, target can be selected more hydrophobic plastic material, comprises that PET, PDMS, PVC etc. make, for example, in a concrete example, can be with thickness 50 μ m, the PE disk of radius 5mm is as target.Connecting link can pass through stainless steel, and light metal (is as Lv ﹑ Lv He Jin ﹑ almag etc.) make, for example, and in a concrete example, can be using metal needle as connecting link.The first frictional layer material therefor can comprise polyethylene terephthalate, Polyvinylchloride, tygon, teflon, polypropylene, dimethyl silicone polymer, Kynoar, fluorinated ethylene propylene copolymer, polychlorotrifluoroethylene, polyimide and aniline formaldehyde resin etc.The material of the second frictional layer can comprise tygon, polypropylene, teflon, Polyvinylchloride, perfluoroethylene-propylene, nylon, Kynoar, haloflex, chlorosulfonated polyethylene, silicon rubber, tetrafluoroethylene-ethylene copolymer, polychlorotrifluoroethylene, polystyrene, chlorinated polyether, polyimide, polyester, ethylene-vinyl acetate copolymer, TPV, Polyurethane Thermoplastic Elastomer, ethylene-propylene-diene rubber etc.
Finally, the friction-type flow sensor forming taking the first frictional layer and the second frictional layer, as example, is introduced the concrete set-up mode of the friction-type flow sensor in above-described embodiment in detail.For the friction-type flow sensor being formed by the first frictional layer and the 3rd frictional layer, also can adopt similar set-up mode.
In the first set-up mode of friction-type flow sensor, the first frictional layer is realized by the first electrode and the first high molecular polymer insulation course of being coated on the first side surface of the first electrode, and the second frictional layer is realized by the second electrode and the second high molecular polymer insulation course of being coated on the first side surface of the second electrode.Wherein, the first high molecular polymer insulation course and the second high molecular polymer insulation course are oppositely arranged.
For example, in a concrete example of the present utility model, can be used as the first electrode by PET sheet, and in a side of PET sheet the speed spin coating PDMS material (i.e. the first high molecular polymer insulation course) with 1000rpm, after spin coating 1 minute, on heating plate, solidify, form thus the first frictional layer.Then, be above fixedly installed PVDF material (being equivalent to the second high molecular polymer insulation course) by conductive tape at another PET sheet (being equivalent to the second electrode), form thus the second frictional layer.
The first frictional layer and the second frictional layer that form by the way comprise four-layer structure altogether.In this four-layer structure, the first high molecular polymer insulation course and the second high molecular polymer insulation course rub as two frictional interfaces, and induce electric charge at the second electrode and the first electrode place.
Lower mask body is introduced the material of the friction-type flow sensor in the first set-up mode.Wherein, the first high molecular polymer insulation course and the second high molecular polymer insulation course are respectively and are selected from Kapton, aniline formaldehyde resin film, polyoxymethylene film, ethyl cellulose film, polyamide film, melamino-formaldehyde film, polyglycol succinate film, cellophane, cellulose acetate film, polyethylene glycol adipate film, polydiallyl phthalate film, renewable sponge film, cellulose sponge film, elastic polyurethane body thin film, styrene-acrylonitrile copolymer copolymer film, styrene-butadiene-copolymer film, regenerated fiber film, poly-methyl film, methacrylic acid ester film, polyvinyl alcohol film, polyvinyl alcohol film, mylar, polyisobutylene film, polyurethane flexible sponge film, pet film, polyvinyl butyral film, formaldehyde phenol film, neoprene film, butadiene-propylene copolymer film, natural rubber film, polyacrylonitrile film, any in vinyl cyanide vinyl chloride film and tygon the third diphenol carbonate thin film.Wherein, the material of described the first high molecular polymer insulation course and the second high molecular polymer insulation course can be identical, also can be different.If the material of two-layer high molecular polymer insulation course is all identical, can cause the quantity of electric charge of electrification by friction very little.Preferably, described the first high molecular polymer insulation course is different from described the second high molecular polymer insulation course material.
Wherein, described the first electrode and the second electrode material therefor all can be selected from indium tin oxide, Graphene, nano silver wire film, metal or alloy; Wherein, metal is Au Ag Pt Pd, aluminium, nickel, copper, titanium, chromium, selenium, iron, manganese, molybdenum, tungsten or vanadium; Alloy is aluminium alloy, titanium alloy, magnesium alloy, beryllium alloy, aldary, kirsite, manganese alloy, nickel alloy, lead alloy, ashbury metal, cadmium alloy, bismuth alloy, indium alloy, gallium alloy, tungalloy, molybdenum alloy, niobium alloy or tantalum alloy.
In the second set-up mode of friction-type flow sensor, can on the basis of the first set-up mode, save the first high molecular polymer insulation course in the first frictional layer, or save the second high molecular polymer insulation course in the second frictional layer.For example, to save the second high molecular polymer insulation course in the second frictional layer, this friction-type flow sensor is three-decker, respectively: the first electrode and be coated in the first high molecular polymer insulation course on the first electrode, and the second electrode.Wherein, the first electrode and the first high molecular polymer insulation course are as the first frictional layer, and the second electrode is as the second frictional layer.Now, the first high molecular polymer insulation course and the second electrode are oppositely arranged and rub as two frictional interfaces of friction-type flow sensor, and induce electric charge on the first electrode and the second electrode.
In the second set-up mode, the material of the material of the first high molecular polymer insulation course and the first electrode and the second electrode all can be selected with reference to the first set-up mode.But because the second electrode need to use as friction electrode, therefore, preferably, the second electrode selects above-mentioned metal or alloy to make.
In the third set-up mode of friction-type flow sensor, can on the basis of the first set-up mode, increase one deck thin layer between two parties, this between two parties thin layer both can be arranged on the first high molecular polymer insulation course, also can be arranged on the second high molecular polymer insulation course.For example, be arranged on the first high molecular polymer insulation course with thin layer between two parties, this friction-type flow sensor is five-layer structure, respectively: the first electrode, be coated in the first high molecular polymer insulation course on the first electrode and be coated in the thin layer between two parties on the first high molecular polymer insulation course, and the second electrode and be coated in the second high molecular polymer insulation course on the second electrode.Wherein, the first electrode, the first high molecular polymer insulation course and thin layer is as the first frictional layer between two parties, the second electrode and the second high molecular polymer insulation course are as the second frictional layer.Now, the second high molecular polymer insulation course and between two parties thin layer are oppositely arranged and rub as two frictional interfaces of friction-type flow sensor, and induce electric charge on the first electrode and the second electrode.
In the third set-up mode, the material of thin layer can be selected with reference to the first high molecular polymer insulation course and the second high molecular polymer insulation course between two parties, and the material of remainder is all identical with the first set-up mode.Wherein, described the first high molecular polymer insulation course, the second high molecular polymer insulation course and the material of thin layer can be identical between two parties, also can be different.If the material of above-mentioned three layers is all identical, can cause the quantity of electric charge of electrification by friction very little.Preferably, described the first high molecular polymer insulation course and/or the second high molecular polymer insulation course are different from the described material of thin layer between two parties.The first high molecular polymer insulation course is preferably identical with the second high molecular polymer insulation course, can reduce material category like this, makes making of the present utility model convenient.
Concentrate the principle of work of introducing the friction-type flow sensor in above-mentioned several set-up mode below.In the time that the first frictional layer produces displacement with connecting link, rub with the second frictional layer, cause thus the surperficial phase mutual friction of two frictional interfaces to produce static charge, the generation of static charge can make the electric capacity between the first electrode and the second electrode change, thereby causes occurring electric potential difference between the first electrode and the second electrode.Because the first electrode is connected with external circuit as the output terminal of friction-type flow sensor with the second electrode, therefore between two of friction-type flow sensor output terminals, be equivalent to be communicated with by external circuit.When the first frictional layer returns to after initial position, the built-in potential being at this moment formed between the first electrode and the second electrode disappears, and now between Balanced the first electrode and the second electrode, will again produce reverse electric potential difference.Just can in external circuit, form thus periodic alternating-current pulse electric signal, carry out the mobility status of sensing fluid by this electric signal.
In addition, in order to improve the sensitivity of friction-type flow sensor, at least one face in two above-mentioned frictional interfaces, micro-nano structure can also be further set.Therefore, make two frictional interface contact frictions better, and induce more electric charge at the first electrode and the second electrode place.Above-mentioned micro-nano structure specifically can be taked following two kinds of possible implementations: first kind of way is that this micro-nano structure is micron order or nano level very little concaveconvex structure.This concaveconvex structure can increase frictional resistance, improves generating efficiency.Described concaveconvex structure can directly form in the time of film preparation, also can make the surface of frictional interface form irregular concaveconvex structure by the method for polishing.Particularly, this concaveconvex structure can be the concaveconvex structure of semicircle, striated, cubic type, rectangular pyramid or the shape such as cylindrical.The second way is, this micro-nano structure is the poroid structure of nanoscale, now the first high molecular polymer insulation course material therefor is preferably Kynoar (PVDF), and its thickness is the preferred 1.0mm of 0.5-1.2mm(), and the face of its relative the second electrode is provided with multiple nano-pores.Wherein, the size of each nano-pore, i.e. width and the degree of depth, can select according to the needs of application, and preferred nano-pore is of a size of: width is that 10-100nm and the degree of depth are 4-50 μ m.The quantity of nano-pore can output current value and magnitude of voltage as required be adjusted, and preferably these nano-pores are that pitch of holes is being uniformly distributed of 2-30 μ m, and preferred average pitch of holes is being uniformly distributed of 9 μ m.
The flow sensor that the utility model provides, can accurately reflect the fluid mobility status of pipe interior.This flow sensor has the many advantages such as precision is high, simple in structure and with low cost, can be widely used in all kinds of scenes, is particularly useful for the mobility status of sensing liquid in the scene of interim feed flow.
Although it will be understood by those skilled in the art that in above-mentioned explanation, for ease of understanding, the step of method is adopted to succession description, it should be pointed out that for the order of above-mentioned steps and do not do strict restriction.
One of ordinary skill in the art will appreciate that all or part of step realizing in above-described embodiment method is can carry out the hardware that instruction is relevant by program to complete, this program can be stored in a computer read/write memory medium, as: ROM/RAM, magnetic disc, CD etc.
Will also be appreciated that the apparatus structure shown in accompanying drawing or embodiment is only schematically, presentation logic structure.The module wherein showing as separating component may or may not be physically to separate, and the parts that show as module may be or may not be physical modules.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if these amendments of the present utility model and within modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (12)
1. for a flow sensor for pipeline monitoring, it is characterized in that, comprising: target, first group of friction-type flow sensor and connecting link; Wherein,
Described target is positioned at monitored pipe interior, its in described pipeline, have fluid by time produce the first displacement;
Described connecting link is set to be fixedly connected with through the first perforate on described pipeline and with described target;
Described first group of friction-type flow sensor is positioned at described pipeline external, comprising:
The first frictional layer, described the first frictional layer is fixedly connected with described connecting link, and produces second displacement corresponding with described the first displacement under the drive of described connecting link;
The second frictional layer, described the second frictional layer is fixed on described pipeline external, and the first side surface of itself and described the first frictional layer is oppositely arranged, and the distance between described the second frictional layer and described the first frictional layer is less than the displacement of described the second displacement.
2. flow sensor as claimed in claim 1, it is characterized in that, the first side surface of described target is vertical with the flow direction of the fluid in described pipeline, or the flow direction of the fluid in the first side surface and the described pipeline of described target is 30 ° of-60 ° of settings.
3. flow sensor as claimed in claim 2, is characterized in that, further comprises: connect the position limiting structure of described pipeline and described connecting link, described connecting link is suspended in pipe interior by described position limiting structure, and can be movable in described pipeline.
4. flow sensor as claimed in claim 3, is characterized in that, further comprises: be fixed on the arc substrate of described pipeline external, described the second frictional layer is fixed on described pipeline external by described arc substrate; On described arc substrate, the position of corresponding described the first perforate is provided with the second perforate, and described connecting link connects described target and the first frictional layer through described the first perforate and the second perforate,
Wherein, described position limiting structure connects described pipeline and described connecting link by described arc substrate.
5. the flow sensor as described in claim 3 or 4 any one, is characterized in that, described position limiting structure is leverage, and described connecting link can swing along the flow direction of described fluid at pipe interior taking described leverage as fulcrum.
6. flow sensor as claimed in claim 5, is characterized in that, between described the first perforate or described the second perforate and described connecting link, is further provided with elastic seal ring.
7. the flow sensor as described in claim 3 or 4 any one, is characterized in that, described position limiting structure is revolute pair, and described connecting link can rotate at pipe interior by described revolute pair.
8. the flow sensor as described in claim 1-7 any one, it is characterized in that, further comprise: second group of friction-type flow sensor, described second group of friction-type flow sensor comprises the 3rd frictional layer and described the first frictional layer that are fixed on described pipeline external, the second side surface of described the 3rd frictional layer and described the first frictional layer is oppositely arranged, and the distance between described the 3rd frictional layer and described the first frictional layer is less than the displacement of described the second displacement.
9. flow sensor as claimed in claim 8, is characterized in that, after mutually connecting between described first group of friction-type flow sensor and described second group of friction-type flow sensor, the electric signal process unit external with is connected; Or,
After parallel with one another between described first group of friction sensor and described second group of friction sensor, the electric signal process unit external with is connected; Or,
Described first group of friction sensor and described second group of friction sensor respectively electric signal process unit external with two are connected.
10. flow sensor as claimed in claim 9, is characterized in that, further comprises: the alarm being connected with described electric signal process unit.
11. flow sensors as claimed in claim 8, is characterized in that, described first group of friction-type flow sensor is three-decker, four-layer structure or five-layer structure, and this group friction-type flow sensor at least comprises two opposite faces that form frictional interface; And/or,
Described second group of friction-type flow sensor is three-decker, four-layer structure or five-layer structure, and this group friction-type flow sensor at least comprises two opposite faces that form frictional interface.
12. flow sensors as claimed in claim 11, is characterized in that, at least one face in described frictional interface is provided with micro-nano structure.
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| CN201420084276.8U CN203719699U (en) | 2014-02-26 | 2014-02-26 | Flow sensing device for pipeline monitoring |
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| CN201420084276.8U CN203719699U (en) | 2014-02-26 | 2014-02-26 | Flow sensing device for pipeline monitoring |
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| CN203719699U true CN203719699U (en) | 2014-07-16 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864920A (en) * | 2014-02-26 | 2015-08-26 | 纳米新能源（唐山）有限责任公司 | Flow sensing device for pipeline monitoring |
| CN105203139A (en) * | 2015-07-28 | 2015-12-30 | 纳智源科技（唐山）有限责任公司 | Pneumatic sensor |
| CN106136321A (en) * | 2015-03-23 | 2016-11-23 | 纳米新能源（唐山）有限责任公司 | Diaphragm type pneumatic transmitter, airflow treatment device and electronic cigarette |
| CN106483324A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | Flow rate measuring device |
| CN107505013A (en) * | 2017-08-26 | 2017-12-22 | 上海曼斐电器贸易有限公司 | A kind of new target type meter |
| CN107588813A (en) * | 2017-08-26 | 2018-01-16 | 上海曼斐电器贸易有限公司 | A kind of target type meter |
-
2014
- 2014-02-26 CN CN201420084276.8U patent/CN203719699U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864920A (en) * | 2014-02-26 | 2015-08-26 | 纳米新能源（唐山）有限责任公司 | Flow sensing device for pipeline monitoring |
| CN104864920B (en) * | 2014-02-26 | 2018-05-08 | 纳米新能源（唐山）有限责任公司 | Flow sensor for Monitoring Pinpelines |
| CN106136321A (en) * | 2015-03-23 | 2016-11-23 | 纳米新能源（唐山）有限责任公司 | Diaphragm type pneumatic transmitter, airflow treatment device and electronic cigarette |
| CN106136321B (en) * | 2015-03-23 | 2018-11-20 | 纳米新能源（唐山）有限责任公司 | Diaphragm type pneumatic transmitter, airflow treatment device and electronic cigarette |
| CN105203139A (en) * | 2015-07-28 | 2015-12-30 | 纳智源科技（唐山）有限责任公司 | Pneumatic sensor |
| CN105203139B (en) * | 2015-07-28 | 2017-08-08 | 纳智源科技（唐山）有限责任公司 | Pneumatic transmitter |
| CN106483324A (en) * | 2015-08-31 | 2017-03-08 | 中国石油化工股份有限公司 | Flow rate measuring device |
| CN107505013A (en) * | 2017-08-26 | 2017-12-22 | 上海曼斐电器贸易有限公司 | A kind of new target type meter |
| CN107588813A (en) * | 2017-08-26 | 2018-01-16 | 上海曼斐电器贸易有限公司 | A kind of target type meter |
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