CN103234589B - A kind of V-type cone restriction device for the test of vehicle fuel volume read-out - Google Patents
A kind of V-type cone restriction device for the test of vehicle fuel volume read-out Download PDFInfo
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- CN103234589B CN103234589B CN201310173780.5A CN201310173780A CN103234589B CN 103234589 B CN103234589 B CN 103234589B CN 201310173780 A CN201310173780 A CN 201310173780A CN 103234589 B CN103234589 B CN 103234589B
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Abstract
The invention provides a kind of V-type cone restriction device for the test of vehicle fuel volume read-out, comprise body, main Measurement channel and bypass Measurement channel, main channel retaining valve and bypass channel retaining valve, main thoroughfare V-type throttling element and bypass channel V-type throttling element, high pressure pressure pipeline and low pressure pressure pipeline, the caliber of main Measurement channel is greater than bypass Measurement channel caliber, article two, more than, the Guan Jing of bypass Measurement channel reduces successively gradually, the opening pressure of main channel retaining valve is greater than bypass channel retaining valve opening pressure, the opening pressure of bypass channel retaining valve reduces successively gradually, main thoroughfare V-type throttling element and bypass channel V-type throttling element is plugged respectively after main channel retaining valve and bypass channel retaining valve, before high pressure pressure pipeline is separately positioned on main channel retaining valve and bypass channel retaining valve, low pressure pressure pipeline penetrates respectively in main thoroughfare V-type throttling element and bypass channel V-type throttling element and communicates with main Measurement channel and bypass Measurement channel.
Description
Technical field
The present invention relates to a kind of fluid flow measuring technology, particularly a kind of V-type cone restriction device for the test of vehicle fuel volume read-out.
Background technology
After 2002, China Automobile Industry starts to enter the explosive growth stage, and by by the end of June, 2011, the total recoverable amount of national motor vehicle reaches 2.17 hundred million.But the fast development of automobile industry also brings many problems to society, as: traffic safety, environmental pollution, petroleum resources shortage etc., especially the shortage of petroleum resources brings difficulty economically to people.Since 2005, domestic and international oil price continues to rise violently, and vapour, the diesel-fuel price of China raise for several times, and like this, oil expense will become a maximum expenditure of family car.Along with the constantly soaring of international and domestic Oil Product Market price and disparities between supply and demand become increasingly conspicuous, some refuelling stations order about inferior rise of the oil price this " opportune moment " in interests, fuel charger measuring apparatus is practised fraud, utilize amendment parameter, chip leg short circuit or change the means such as mainboard of oiling machine chip, increase remote control cheating device, reach the object controlling to refuel quantity, steathily oil, seek unlawful interests, lead consumer into a trap, this phenomenon becomes one large " public hazards " gradually, brings very large interests loss to consumer.But at present China's automobile adopts the fuel tank that articulated float is housed substantially, when float changes its position along with the change of liquid level, the resistance of sensor unit also changes, and then resistance changes electric current and changes the position of instrument panel gauge pointer.Instrument panel majority has 3 ~ 5 scales, respectively instruction roughly full, 3/4,1/2,1/4, empty etc., the amount of fuel that can only show in fuel tank accounts for the general proportions of volume of fuel tank, can not learn the amount of fuel tank trapped fuel accurately.In view of this social phenomenon, the amount how accurately can must measuring institute's oil seems particularly important.
Summary of the invention
The invention provides a kind of V-type cone restriction device for the test of vehicle fuel volume read-out, this restriction device can according to the Measurement channel of the different tube diameters of the pressure change fluid flow path of fluid, thus allows the proving installation using this restriction device can accurate amount of fuel added by measuring vehicle.
Realizing the technical scheme that above-mentioned purpose takes is:
For a V-type cone restriction device for vehicle fuel volume read-out test, comprise body, main Measurement channel and more than at least two bypass Measurement channel, main channel retaining valve and bypass channel retaining valve, main thoroughfare V-type throttling element and bypass channel V-type throttling element, high pressure pressure pipeline and low pressure pressure pipelines, described main Measurement channel and more than at least two bypass Measurement channel walk abreast and are independently arranged on body, the caliber of main Measurement channel is greater than bypass Measurement channel caliber, article two, more than, the Guan Jing of bypass Measurement channel reduces successively gradually, main channel retaining valve and bypass channel retaining valve is respectively equipped with in main Measurement channel and bypass Measurement channel, the opening pressure of main channel retaining valve is greater than bypass channel retaining valve opening pressure, article two, more than, in bypass Measurement channel, the opening pressure of bypass channel retaining valve reduces successively gradually, main thoroughfare V-type throttling element and bypass channel V-type throttling element is plugged respectively after main channel retaining valve and bypass channel retaining valve, high pressure pressure pipeline communicates with main Measurement channel and bypass Measurement channel before being separately positioned on main channel retaining valve and bypass channel retaining valve, low pressure pressure pipeline penetrates respectively in main thoroughfare V-type throttling element and bypass channel V-type throttling element and communicates with main Measurement channel and bypass Measurement channel.
Described bypass Measurement channel arranges 4, and Guan Jing reduces to form first order bypass Measurement channel successively gradually, second level bypass Measurement channel, third level bypass Measurement channel, fourth stage bypass Measurement channel, at first order bypass Measurement channel, second level bypass Measurement channel, third level bypass Measurement channel, first order bypass channel retaining valve is respectively equipped with in fourth stage bypass Measurement channel, second level bypass channel retaining valve, third level bypass channel retaining valve, fourth stage bypass channel retaining valve, main channel retaining valve opening pressure is greater than first order bypass channel retaining valve opening pressure, first order bypass channel retaining valve opening pressure is greater than second level bypass channel retaining valve opening pressure, second level bypass channel retaining valve opening pressure is greater than third level bypass channel retaining valve opening pressure, third level bypass channel retaining valve opening pressure is greater than fourth stage bypass channel retaining valve opening pressure, ensures fourth stage bypass channel retaining valve, third level bypass channel retaining valve, second level bypass channel retaining valve, first order bypass channel retaining valve sequentially opens or closes, first order bypass Measurement channel, second level bypass Measurement channel, third level bypass Measurement channel, first order bypass channel retaining valve in fourth stage bypass Measurement channel, second level bypass channel retaining valve, third level bypass channel retaining valve, first order bypass channel V-type throttling element is filled in respectively after fourth stage bypass channel retaining valve, second level bypass channel V-type throttling element, third level bypass channel V-type throttling element, fourth stage bypass channel V-type throttling element, high pressure pressure pipeline is separately positioned on first order bypass channel retaining valve, second level bypass channel retaining valve, third level bypass channel retaining valve, with first order bypass Measurement channel before fourth stage bypass channel retaining valve, second level bypass Measurement channel, third level bypass Measurement channel, fourth stage bypass Measurement channel communicates, and low pressure pressure pipeline penetrates first order bypass channel V-type throttling element respectively, second level bypass channel V-type throttling element, third level bypass channel V-type throttling element, fourth stage bypass channel V-type throttling element and first order bypass Measurement channel, second level bypass Measurement channel, third level bypass Measurement channel, fourth stage bypass Measurement channel communicates.
Described main thoroughfare V-type throttling element and bypass channel V-type throttling element are the sharp cones be coaxially arranged on main Measurement channel and bypass Measurement channel with.
The present invention designs main channel and measures and many bypass channels measurements in order to accurately measure added amount of fuel, according to the Measurement channel of the different tube diameters of the pressure change fluid flow path of fluid in refueling process, thus make the result of measurement more accurate, thus ensure the interests of consumer.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is structure theory of constitution figure of the present invention;
Fig. 2 is the circuit catenation principle figure of differential pressure transmitter processing module of the present invention and display module;
Fig. 3 is V-type of the present invention cone restriction device front view;
Fig. 4 is C-C sectional view in Fig. 3;
Fig. 5 is V-type of the present invention cone restriction device left view;
Fig. 6 is B-B sectional view in Fig. 5;
Fig. 7 is A-A sectional view in Fig. 5;
Fig. 8 is assembling schematic diagram of the present invention.
Embodiment
The present invention introduces a kind of vehicle fuel volume read-out proving installation by following instantiation, and as shown in Figure 8, this device comprises inflow pipeline 1, flowline 4, V-type cone restriction device 3, current regulator 5, three valve group assembly 7, differential pressure transmitter 8, display module 9.
As Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, shown in Fig. 8, V-type cone restriction device 3 is connected on inflow pipeline 1, between flowline 4, V-type cone restriction device 3 comprises body 31, main Measurement channel 32 and 4 bypass Measurement channel bypass Measurement channel is first order bypass Measurement channel 38 respectively, second level bypass Measurement channel 35, third level bypass Measurement channel 39, fourth stage bypass Measurement channel 30, main channel retaining valve 323 and first order bypass channel retaining valve 383, second level bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, fourth stage bypass channel retaining valve (figure is not depending on going out), main thoroughfare V-type throttling element 324 and first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out), high pressure pressure pipeline 36 and low pressure pressure pipeline 37.
As Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Fig. 7, main Measurement channel 32 and 4 bypass Measurement channel independent parallels to be arranged on body 31, and the caliber of main Measurement channel 32 is greater than 4 bypass Measurement channel calibers, 4 bypass Measurement channel first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, fourth stage bypass Measurement channel 30 pipe, through reducing gradually successively, is provided with main channel retaining valve 323 in main Measurement channel 32, at first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, first order bypass channel retaining valve 383 is respectively equipped with in fourth stage bypass Measurement channel 30, second level bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, fourth stage bypass channel retaining valve (figure is not depending on going out), main channel retaining valve 323 opening pressure is greater than first order bypass channel retaining valve 383 opening pressure, first order bypass channel retaining valve 383 opening pressure is greater than second level bypass channel retaining valve (figure is not depending on going out) opening pressure, second level bypass channel retaining valve (figure is not depending on going out) opening pressure is greater than third level bypass channel retaining valve 393 opening pressure, third level bypass channel retaining valve 393 opening pressure is greater than fourth stage bypass channel unidirectional (figure is not depending on going out) valve opening pressure, ensures fourth stage bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, second level bypass channel retaining valve (figure is not depending on going out), first order bypass channel retaining valve 383, main channel retaining valve 323 sequentially opens or closes.
As Fig. 6, shown in Fig. 7, plug main thoroughfare V-type throttling element 324 after main channel retaining valve 323 in main Measurement channel 32, at first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, first order bypass channel retaining valve 383 in fourth stage bypass Measurement channel 30, second level bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, first order bypass channel V-type throttling element 384 is filled in respectively after fourth stage bypass channel retaining valve (figure is not depending on going out), second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out).
As Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, shown in Fig. 8, high pressure pressure pipeline 36 is by high pressure pressure primary branch 362, high pressure pressure first arm 368, high pressure pressure second arm 365, high pressure pressure the 3rd arm 369, high pressure pressure the 4th arm 360 is separately positioned on main channel retaining valve 323, first order bypass channel retaining valve 383, second level bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, with main Measurement channel 32 before fourth stage bypass channel retaining valve (figure is not depending on going out), first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, fourth stage bypass Measurement channel communicates 30, and low pressure pressure pipeline 37 is by low pressure pressure primary branch 372, low pressure pressure first arm 378, low pressure pressure second arm (figure is not depending on going out), low pressure pressure the 3rd arm 379, low pressure pressure the 4th arm (figure is not depending on going out) penetrates main thoroughfare V-type throttling element 324 respectively, first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out) and main Measurement channel 32, first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, fourth stage bypass Measurement channel 30 communicates.
As Fig. 6, shown in Fig. 7, described main thoroughfare V-type throttling element 324 and first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out) is coaxially arranged on main Measurement channel 32 with one, first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, sharp cone in fourth stage bypass Measurement channel 30, it is a kind of based on Venturi measuring principle, union Venturi tube, annular orifice and wear-resisting orifice plate advantage are in the throttling element of one, it changes throttling layout, ring-type throttling is changed into from center throttling, also be a kind ofly get differential pressure to reflect the throttling element of uninterrupted by throttling.
When just having started to refuel, along with volume read-out is large, when hydrodynamic pressure reaches certain value, fourth stage bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, second level bypass channel retaining valve (figure is not depending on going out), first order bypass channel retaining valve 383, main channel retaining valve 323 is sequentially opened, so fluid flows through main Measurement channel 32, first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, fourth stage bypass Measurement channel communicates will at main thoroughfare V-type throttling element 324 and first order bypass channel V-type throttling element 384 in 30, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out) place forms local contraction, thus flow velocity is increased, and static pressure reduces, so at main thoroughfare V-type throttling element 324 and first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, create static pressure difference before and after fourth stage bypass channel V-type throttling element (figure is not depending on going out), along with the minimizing of fuel charger volume read-out, pressure reduces, and when hydrodynamic pressure is lower than certain value, main channel retaining valve 323 is first closed, first order bypass channel retaining valve 383, second level bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, fourth stage bypass channel retaining valve (figure is not depending on going out) closedown successively.
As Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, shown in Fig. 8, the high pressure P 1 of described high pressure pressure pipeline 36 is by high pressure pressure primary branch 362, high pressure pressure first arm 368, high pressure pressure second arm 365, high pressure pressure the 3rd arm 369, before high pressure pressure the 4th arm 360 takes from cone, fluid is undisturbed the main Measurement channel 32 of (namely do not form throttling, fluid does not accelerate), first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, hydrodynamic pressure in fourth stage bypass Measurement channel 30, the low pressure P2 of described low pressure pressure pipeline 37 is by low pressure pressure primary branch 372, low pressure pressure first arm 378, low pressure pressure second arm (figure is not depending on going out), low pressure pressure the 3rd arm 379, main Measurement channel 32 after low pressure pressure the 4th arm (figure is not depending on going out) takes from cone respectively, first order bypass Measurement channel 38, second level bypass Measurement channel 35, third level bypass Measurement channel 39, hydrodynamic pressure (namely form throttling, fluid accelerates) in fourth stage bypass Measurement channel 30, the square root of its differential pressure Δ P is directly proportional to flow.
As shown in Figure 1, Figure 2, shown in Fig. 8, described differential pressure transmitter 8, mainly comprise high pressure connecting pipe 86, low pressure connecting pipe 87, sensor assembly 81, advance signal amplification circuit module 82, Signal-regulated kinase 83, CPU module 84, described high pressure connecting pipe 86 is connected by high-voltage signal pipeline 861 and high pressure pressure pipeline 36, and described low pressure connecting pipe 87 is connected by low-voltage signal pipeline 871 and low pressure pressure pipeline 37; Sensor assembly 81, advance signal amplification circuit module 82, Signal-regulated kinase 83 are sequentially connected in series and are finally connected with CPU module 84, directly act on sensor assembly 81 by the differential pressure from high pressure connecting pipe 86, low pressure connecting pipe 87 and convert differential pressure signal to, differential pressure signal processes pass CPU module 84 computing through advance signal amplification circuit module 82, Signal-regulated kinase 83.
As shown in Figure 1, Figure 2, shown in Fig. 8, described display module 9 is connected with CPU module 84, for showing CPU module 84 by computing result.
As shown in Figure 8; three described valve group assemblies 7 are connected between high pressure connecting pipe 86, low pressure connecting pipe 87 and high-voltage signal pipeline 861, low-voltage signal pipeline 871; comprising two stop valves, 71,72 and equalizing valve 73 to form, is the pressure in the positive and negative pressure chamber of balance, is used for protecting differential pressure transmitter 8.
As shown in Figure 8, described current regulator 5 is connected on inflow pipeline 1, and primary structure is bag type accumulator, plays regime flow, absorbs the effect of vibration, can improve the precision of measurement mechanism.
Method of work of the present invention is:
(1), when refueling a car, fuel oil flows into V-type cone restriction device 3 by nozzle through inflow pipeline 1, increases gradually and be greater than fourth stage bypass channel retaining valve (figure is not depending on going out) when hydrodynamic pressure, third level bypass channel retaining valve 393, second level bypass channel retaining valve (figure is not depending on going out), first order bypass channel retaining valve 383, during retaining valve 323 setup pressure value of main channel, fourth stage bypass channel retaining valve (figure is not depending on going out), third level bypass channel retaining valve 393, second level bypass channel retaining valve (figure is not depending on going out), first order bypass channel retaining valve 383, main channel retaining valve 323 is sequentially opened, and fluid will at main thoroughfare V-type throttling element 324 and first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out) place forms local contraction, thus flow velocity is increased, and static pressure reduces, and high pressure pressure pipeline 36 and low pressure pressure pipeline 37 are by high pressure connecting pipe 86, low pressure connecting pipe 87 is by main thoroughfare V-type throttling element 324 and first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, high pressure before and after fourth stage bypass channel V-type throttling element (figure is not depending on going out), the differential pressure transmitter 8 that low-pressure reaches carries out flow rate test,
(2), along with the minimizing of fuel charger volume read-out, pressure reduces, during opening pressure lower than the setting of main channel retaining valve 323, main channel retaining valve 323 is closed, and the differential pressure transmitter 8 that the high pressure before and after first order bypass channel V-type throttling element 384, second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out), low-pressure reach is carried out flow rate test respectively by high pressure connecting pipe 86, low pressure connecting pipe 87 by high pressure pressure pipeline 6 and low pressure pressure pipeline 7;
(3) gradually reducing, along with fuel charger volume read-out, pressure is progressively low, opening pressure first order bypass channel retaining valve 383 lower than the setting of first order bypass channel retaining valve 383 is closed, and the differential pressure transmitter 8 that the high pressure before and after second level bypass channel V-type throttling element (figure is not depending on going out), third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out), low-pressure reach is carried out flow rate test respectively by high pressure connecting pipe 86, low pressure connecting pipe 97 by high pressure pressure pipeline 6 and low pressure pressure pipeline 7;
(4) reducing again, along with fuel charger volume read-out, pressure reduces again, lower than the opening pressure second level bypass channel closed check valve of second level bypass channel retaining valve setting, the differential pressure transmitter 8 that the high pressure before and after third level bypass channel V-type throttling element 394, fourth stage bypass channel V-type throttling element (figure is not depending on going out), low-pressure reach is carried out flow rate test respectively by high pressure connecting pipe 86, low pressure connecting pipe 87 by high pressure pressure pipeline 6 and low pressure pressure pipeline 7;
(5), along with the minimizing again of fuel charger volume read-out, pressure reduces again, opening pressure third level bypass channel retaining valve 393 lower than the setting of third level bypass channel retaining valve 393 is closed, and the differential pressure transmitter 8 that the high pressure before and after fourth stage bypass channel V-type throttling element, low-pressure reach is carried out flow rate test respectively by high pressure connecting pipe 86, low pressure connecting pipe 87 by high pressure pressure pipeline 6 and low pressure pressure pipeline 7;
(6), differential pressure transmitter 8 carries out flow and adds up and shown.
The present invention is in refueling process, designs main channel and measures and many bypass channels measurements, thus make the result of measurement more accurate to can accurately measure added amount of fuel.Adopt the V-type cone restriction device with advantages such as precision are high, the life-span long, straight length requirement is low, broad quantum, Long-Time Service are reliable and stable as fuel oil test core, measure the exact flow rate of fuel oil, thus obtain the volume of institute's oil, result carries out digitizing display, can allow consumer accurately, intuitively to the amount of institute's oil.
Claims (3)
1., for a V-type cone restriction device for vehicle fuel volume read-out test, it is characterized in that: comprise body, main Measurement channel and at least two bypass Measurement channel, main channel retaining valve and bypass channel retaining valve, main thoroughfare V-type throttling element and bypass channel V-type throttling element, high pressure pressure pipeline and low pressure pressure pipelines; described main Measurement channel and at least two bypass Measurement channel walk abreast and are independently arranged on body, the caliber of main Measurement channel is greater than bypass Measurement channel caliber, article two, more than, the caliber of bypass Measurement channel reduces successively gradually, main channel retaining valve and bypass channel retaining valve is respectively equipped with in main Measurement channel and bypass Measurement channel, the opening pressure of main channel retaining valve is greater than bypass channel retaining valve opening pressure, article two, more than, in bypass Measurement channel, the opening pressure of bypass channel retaining valve reduces successively gradually, main thoroughfare V-type throttling element and bypass channel V-type throttling element is plugged respectively after main channel retaining valve and bypass channel retaining valve, high pressure pressure pipeline communicates with main Measurement channel and bypass Measurement channel before being separately positioned on main channel retaining valve and bypass channel retaining valve, low pressure pressure pipeline penetrates respectively in main thoroughfare V-type throttling element and bypass channel V-type throttling element and communicates with main Measurement channel and bypass Measurement channel, described main thoroughfare V-type throttling element and bypass channel V-type throttling element are a kind of based on Venturi measuring principle, union Venturi tube, annular orifice and wear-resisting orifice plate are in the throttling element of one.
2. a kind of V-type for the test of vehicle fuel volume read-out bores restriction device as claimed in claim 1, it is characterized in that: described bypass Measurement channel arranges 4, and caliber reduces to form first order bypass Measurement channel successively gradually, second level bypass Measurement channel, third level bypass Measurement channel, fourth stage bypass Measurement channel, at first order bypass Measurement channel, second level bypass Measurement channel, third level bypass Measurement channel, first order bypass channel retaining valve is respectively equipped with in fourth stage bypass Measurement channel, second level bypass channel retaining valve, third level bypass channel retaining valve, fourth stage bypass channel retaining valve, main channel retaining valve opening pressure is greater than first order bypass channel retaining valve opening pressure, first order bypass channel retaining valve opening pressure is greater than second level bypass channel retaining valve opening pressure, second level bypass channel retaining valve opening pressure is greater than third level bypass channel retaining valve opening pressure, third level bypass channel retaining valve opening pressure is greater than fourth stage bypass channel retaining valve opening pressure, ensures fourth stage bypass channel retaining valve, third level bypass channel retaining valve, second level bypass channel retaining valve, first order bypass channel retaining valve sequentially opens or closes, first order bypass Measurement channel, second level bypass Measurement channel, third level bypass Measurement channel, first order bypass channel retaining valve in fourth stage bypass Measurement channel, second level bypass channel retaining valve, third level bypass channel retaining valve, first order bypass channel V-type throttling element is plugged respectively after fourth stage bypass channel retaining valve, second level bypass channel V-type throttling element, third level bypass channel V-type throttling element, fourth stage bypass channel V-type throttling element, high pressure pressure pipeline is separately positioned on first order bypass channel retaining valve, second level bypass channel retaining valve, third level bypass channel retaining valve, with first order bypass Measurement channel before fourth stage bypass channel retaining valve, second level bypass Measurement channel, third level bypass Measurement channel, fourth stage bypass Measurement channel communicates, and low pressure pressure pipeline penetrates first order bypass channel V-type throttling element respectively, second level bypass channel V-type throttling element, third level bypass channel V-type throttling element, fourth stage bypass channel V-type throttling element and first order bypass Measurement channel, second level bypass Measurement channel, third level bypass Measurement channel, fourth stage bypass Measurement channel communicates.
3. a kind of V-type for the test of vehicle fuel volume read-out bores restriction device as claimed in claim 1, it is characterized in that: described main thoroughfare V-type throttling element is a sharp cone, is arranged in main Measurement channel, coaxial with main Measurement channel; Described bypass measurement is a sharp cone, is arranged in bypass Measurement channel, coaxial with bypass Measurement channel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310173780.5A CN103234589B (en) | 2013-05-13 | 2013-05-13 | A kind of V-type cone restriction device for the test of vehicle fuel volume read-out |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310173780.5A CN103234589B (en) | 2013-05-13 | 2013-05-13 | A kind of V-type cone restriction device for the test of vehicle fuel volume read-out |
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| CN103234589A CN103234589A (en) | 2013-08-07 |
| CN103234589B true CN103234589B (en) | 2016-03-30 |
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| CN108931272B (en) * | 2017-05-27 | 2021-12-31 | 深圳市美好创亿医疗科技股份有限公司 | Porous differential pressure flow sensor and pulmonary function instrument |
| CN109357920B (en) * | 2018-11-15 | 2024-03-22 | 深圳国技仪器有限公司 | Portable wide-range ambient air sampler |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6681189B1 (en) * | 2001-08-22 | 2004-01-20 | The Texas A&M University System | Method and system for determining flow rates and/or fluid density in single and multiple-phase flows utilizing discharge coefficient relationships |
| CN101042303A (en) * | 2006-03-22 | 2007-09-26 | 赵树行 | V-shaped cone flowmeter with porous pressure sampling |
| CN201463944U (en) * | 2009-05-18 | 2010-05-12 | 天津市科特控制设备有限公司 | Internal type V-cone flowmeter |
| CN203287053U (en) * | 2013-05-13 | 2013-11-13 | 山西宏慧盛世科技有限公司 | V-type cone throttling device for vehicle fuel oil charging quantity measurement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010112923A (en) * | 2008-11-10 | 2010-05-20 | Advance Denki Kogyo Kk | Differential-pressure type flow measuring device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6681189B1 (en) * | 2001-08-22 | 2004-01-20 | The Texas A&M University System | Method and system for determining flow rates and/or fluid density in single and multiple-phase flows utilizing discharge coefficient relationships |
| CN101042303A (en) * | 2006-03-22 | 2007-09-26 | 赵树行 | V-shaped cone flowmeter with porous pressure sampling |
| CN201463944U (en) * | 2009-05-18 | 2010-05-12 | 天津市科特控制设备有限公司 | Internal type V-cone flowmeter |
| CN203287053U (en) * | 2013-05-13 | 2013-11-13 | 山西宏慧盛世科技有限公司 | V-type cone throttling device for vehicle fuel oil charging quantity measurement |
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| CN103234589A (en) | 2013-08-07 |
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