CN2814349Y - Integrated probe type flow meter - Google Patents
Integrated probe type flow meter Download PDFInfo
- Publication number
- CN2814349Y CN2814349Y CN 200520133571 CN200520133571U CN2814349Y CN 2814349 Y CN2814349 Y CN 2814349Y CN 200520133571 CN200520133571 CN 200520133571 CN 200520133571 U CN200520133571 U CN 200520133571U CN 2814349 Y CN2814349 Y CN 2814349Y
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- probe
- valve group
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- valve
- differential pressure
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Abstract
The utility model discloses an integrated probe type flow meter which comprises a probe, a condensing pipe and a probe rod which are installed on a pipeline of measured fluid, wherein the probe is connected with an integrating instrument by a differential pressure transmitter and a power supply; the condensing pipe is connected with the integrating instrument by the pressure transducer and the power supply; the probe rod is connected with the integrating instrument by a temperature sensor, and a valve group is connected between the probe and the differential pressure transmitter. The valve group comprises a primary valve group, a condenser and a three-valve group which are connected in turn and are assembled into a whole. The utility model has the advantages of simple installation, convenient maintenance, wide measuring ranges, small resistance loss, no voltage damage, high reliability, stable work and high-temperature resisting performance, and can accurately measure the small flow.
Description
[technical field]
The utility model relates to the device of monophasic fluid (gas, liquid, steam etc.) traffic flow in a kind of measurement closed conduct, belong to differential pressure flowmeter, more progressive says, relates to a kind of especially integrated probe-type flowmeter of the steam flow of energy measurement High Temperature High Pressure of measuring.
[background technology]
Differential pressure flowmeter is made up of primary device and secondary device, primary device is for measuring primary element, be installed in the pipeline of measuring fluid, produce and the proportional pressure differential of flow velocity, carrying out flow by secondary device shows, secondary device (differential pressure conversion and flow displaying instrument) is accepted to measure the signal that primary device produces, and carries out the processes and displays corresponding discharge.Differential pressure flowmeter can be divided into several big classes such as throttle type, dynamic pressure hair style, hydraulic resistance formula, centrifugal, dynamic pressure gain formula and jetting type by the action principle of its detection piece, wherein is most widely used with throttle type and dynamic pressure hair style.
Aspect installation, the primary device of differential pressure flowmeter and secondary device and middle web member (throttling element, differential pressure transmitter, pressure unit, temperature transmitter, three valve groups, valve, pad, support etc.) thereof, be respectively by the production of each special manufacturer, the user buys each parts respectively and assembles, often various because of product type, renewal speed is fast, the change of installation dimension, each parts that reasons such as each component specification does not conform to are come purchase do not cooperate, and cause a lot of troubles to installation.Shortcomings such as and because of the many installation workload of parts are big, each link easily has problems, and the above-mentioned modular construction that also causes choosing to advance sometimes is backward, volume is heavy, precision is not high, usable range is narrow, function is few, the life-span is short.
Flow measurement for high-temperature steam, the flowmeter kind is a lot, because the restriction of conditions such as temperature, present most of cogeneration plant and chemical plant, what mainly adopt is that the whirlpool connects flowmeter and orifice flowmeter, but it is near apart from high-temperature pipe that the whirlpool connects the flowmeter electronic devices and components, and the easy aged deterioration of electronic devices and components frequently breaks down.What order one side orifice flowmeter used is stainless steel material, makes the high temperature more than 500 ℃ that sensitive element can be anti-with orifice plate, and orifice flowmeter is still the domestic preferred unit that is used for measuring the high-temperature steam flow at present.But orifice flowmeter still has the following disadvantages and defective: the range ratio that at first is orifice plate generally has only 3: 1, when flow diminishes, will cause bigger measuring error.Experiment shows, when flow is 30% when following, just because of the flow measurement number error that causes less than normal of ratings.When flow during less than 10% ratings, pressure reduction sensing less than, flow is difficult to measure, and have to regard as zero.Next is that orifice flowmeter throttling energy loss is bigger, and energy dissipation is serious, goes back abacus after use a period of time, because of wearing and tearing will cause measuring error, need stop steam supply and carry out maintain and replace, and workload is big.In addition, when differential pressure flowmeter is measured steam, when steam stops air feed,, cause the phenomenon that does not have flow really to measure flow because cryosurface can produce extra differential pressure in the connecting pipe not on a surface level.Simultaneously, when normal the measurement, because the cryosurface diverse location causes little differential pressure to depart from, so low discharge almost can't be measured.
At the prior art above shortcomings, the utility model is proposed.
[utility model content]
It is little that the purpose of this utility model provides a kind of volume, structure advanced person, in light weight, long service life, measuring accuracy height, and crushing is low, and is convenient for installation and maintenance, the integrated probe-type flowmeter that intelligent degree is high.
For realizing above-mentioned utility model purpose, the technical scheme of integrated probe-type flowmeter provided by the utility model is conceived as follows substantially: a kind of integrated probe-type flowmeter, comprise the probe that is installed in respectively on the detected fluid pipeline, condenser pipe, feeler lever, probe passes through differential pressure transmitter, power supply is connected on the integrating instrument, condenser pipe passes through pressure unit, power supply links to each other with integrating instrument, feeler lever is connected on the integrating instrument by temperature sensor, be connected with a valve group between probe and the differential pressure transmitter, this valve group comprises a valve group that is linked in sequence successively, condenser, three valve groups, a valve group, condenser, three valve groups are one.
Described probe is welded on valve group.
Described condenser top is provided with vent valve, transfers and is provided with blowoff valve.
Described probe interior is provided with stagnation pressure transfer hole and Hydrostatic Transfer Device hole, and the stagnation pressure transfer hole is connected with the total pressure measurement hole of end of probe, and the Hydrostatic Transfer Device hole is connected with the static bole of end of probe.
Described stagnation pressure transfer hole is two parallel elongated hole with the Hydrostatic Transfer Device hole.
Described probe outside surface is through coarse processing, and its head has separating tank.
Described probe is fixed on by flange and is contained on the pipeline.
The utility model probe assembly is to adopt the parallel small holes of two rows to transmit differential pressure, when measuring steam, the probe assembly level is installed, condensation in the condenser of steam in probe assembly, because of the hole caliber little, condensate water can not flowed in the jet chimney by hole by capillary effect, and guaranteed that the some positions in condensate water and the steam small holes in probe form the binding equilibrium face, because be parallel installation, differential pressure can not cause extra additional pressure reduction because of the position of faying face in two holes is different, thereby can accurately measure differential pressure when having guaranteed low discharge, and then can accurately measure low discharge.
Probe rod portion carries out coarse processing, and club head has separating tank, and burble point is fixed in the time of can making fluid flow through probe like this, has guaranteed the stable of coefficient of flow (K).
Because of and valve, condenser, three valve groups, blowoff valve, vent valve in the design of one, installment work is simplified greatly, and because the integrated production of factory, the maximized extra error that has brought because of installation when having reduced a former valve, condenser and three valve groups and installing has respectively been eliminated the possibility of evaporating, emitting, dripping or leaking of liquid or gas.
The beneficial effects of the utility model are:
One, simple installation, easy to maintenance, probe assembly is integrated valve, drainer, three valve groups etc., transmitter and probe assembly directly link together, and have save intermediate connectors such as connecting pipe, condenser, three valve groups, greatly facilitate installation, reduced by 80% workload.
Two, measurement range is wide, can better accurately measure for low discharge.Also because the coefficient segmented compensation detects the corresponding relation that can obtain fluid reynolds number Re (nondimensional number of fluid flow state, the different fluid situation is similar as the tired identical then flow state of promise number) and COEFFICIENT K according to experiment.By calculating the actual discharge coefficient that can get under the different flow signal, set the approximate broken line of this coefficient in the integrating instrument, after integrating instrument receives differential pressure signal, pressure signal, temperature signal, calculate actual flow with this coefficient, rather than adopt the single coefficient of gamut, to obtain the high precision in the wide range scope.
Three, drag losses is little, does not almost have crushing.Very little because of the long-pending relative duct size cross section of probe cross section, so the fluid flow influence is very little, and drag losses is little.
Four, reliability height, working stability.Because the integrated production of factory, each may problematic link can detect before dispatching from the factory, when eliminating a former valve, condenser and three valve groups and installing respectively because of the evaporating, emitting, dripping or leaking of liquid or gas that may bring and the possibility of the deviation on the size are installed.
Five, high temperature resistant, because of no-movable part in the probes probes, all can adopt the material of high temperature high voltage resistant to make, through condenser, temperature that transmitter contacts was an environment temperature before transmitter was connected with probe assembly, therefore was applicable to measure high temperature, high-pressure fluid.
Six, intelligent degree height, has the function of judging fluid state according to signals such as measuring temperature, pressure, have automatic data logging, temperature and pressure compensation, antitheft, anti-power down, record queries lasts functions such as data, graphic presentation, coefficient of flow segmented compensation, warning, signal calibration, digital communication, simulation output, heat energy integrating, printing, and can develop new function according to customer requirements.
[description of drawings]
Fig. 1 is a fundamental diagram of the present utility model;
Fig. 2 is a measuring system practical application scheme of installation of the present utility model;
Fig. 3 is a measuring probe wiring layout of the present utility model;
Fig. 4 is that Fig. 3 A-A is to cut-open view;
Fig. 5 is the partial enlarged drawing of Fig. 4;
Fig. 6 is a valve group of the present utility model longitudinal profile structural map.
Among the figure: a valve group of 1-probe 2-3-condenser 4-pressure unit 5-condenser pipe 6-differential pressure transmitter 7-temperature becomes 15-total pressure measurement hole, sensor 8-24V direct supply 9-integrating instrument 10-three valve group 11-pipeline 12-control system 13-stagnation pressure transfer hole 14-Hydrostatic Transfer Device hole 16-static bole 17-vent valve 18-flange 19-separating tank 20-feeler lever
[embodiment]
Below in conjunction with accompanying drawing the utility model embodiment is described in detail:
Fig. 1 is a fundamental diagram of the present utility model, as shown in Figure 1, probe assembly produce to transmit stagnation pressure and static pressure signal to differential pressure transmitter, and differential pressure transmitter is measured differential pressure conversion and is output as the 4-20mA current signal and is input to flow integrator, square being directly proportional of this signal and flow.Pressure transmitter measurement goes out hydrodynamic pressure input integrating instrument.Temperature sensor measurement goes out fluid temperature (F.T.) input integrating instrument, and integrating instrument calculates the fluid actual density according to fluid actual temperature, pressure gauge and differential pressure signal calculates, and accurately calculates actual flow.The numeral that integrating instrument calculates shows by display system.All processes can be controlled with control system.
Fig. 2 is a measuring system practical application scheme of installation of the present utility model, and dense black arrow is represented the flow path direction that comes of detected fluid among Fig. 2.As shown in Figure 2, No. one time valve group 2, condenser 3 and three valve groups, 10 one connect and compose the valve group, valve group and probe 1 common formation probe measurement assembly, link to each other with differential pressure transmitter 6 one ends then, the fluid pipeline 11 of flowing through, probe assembly produce to transmit stagnation pressure and static pressure signal to differential pressure transmitter 6, and differential pressure transmitter 6 is measured differential pressure conversion and is output as the 4-20mA current signal and is input to flow integrator 9, square being directly proportional of this signal and flow.The pressure unit 4 that links to each other with condenser 5 is measured hydrodynamic pressure input integrating instrument 9; Pressure unit 4 and differential pressure transmitter 6 are connected on the integrating instrument 9 by power supply 8.The temperature sensor 7 that links to each other with feeler lever 20 is measured fluid temperature (F.T.) input integrating instrument 9, and integrating instrument calculates the fluid actual density according to fluid actual temperature, pressure gauge and differential pressure signal calculates, and accurately calculates actual flow.
Fig. 3 is a measuring probe wiring layout of the present utility model, Fig. 4 be Fig. 3 A-A to cut-open view, Fig. 5 is the partial enlarged drawing of Fig. 4, Fig. 6 is a valve group of the present utility model longitudinal profile structural map.Further the utility model probe assembly is described in detail in conjunction with Fig. 3, Fig. 4, Fig. 5, Fig. 6.Probe 1 is fixed on by flange 18 and is contained on the pipeline 11, and the other end of probe 1 is welded on valve group 2, and condenser 3 tops are provided with vent valve 17, transfer to be provided with blowoff valve (not expressing among the figure, in position, vent valve 17 back).Probe 1 inside is provided with stagnation pressure transfer hole 13 and Hydrostatic Transfer Device hole 14, stagnation pressure transfer hole 13 is connected with the total pressure measurement hole 15 of probe 1 head, Hydrostatic Transfer Device hole 14 is connected with the static bole 16 of probe 1 head, and stagnation pressure transfer hole 13 is two parallel elongated hole with Hydrostatic Transfer Device hole 14; The outside surface of probe 1 is through coarse processing, and its head has separating tank 19.
There are two parallel thin round empty cavity-stagnation pressure transfer hole 13 and Hydrostatic Transfer Device holes 14 to come flow path direction that a total pressure measurement hole 15 is arranged over against fluid in the probe 1 at end of probe, come flow path direction that static bole 16 is also arranged back to fluid, but the position in hole is according to the pipe shape calculated in advance.Experience the stagnation pressure and the static pressure of fluid respectively, mass rate is directly proportional with the square root of the differential pressure of stagnation pressure and static pressure, is directly proportional with the density square root of fluid.That is:
The Q-mass rate
The K-coefficient of flow
Δ P-differential pressure, stagnation pressure and static pressure poor
ρ-fluid density
The N-conversion coefficient, only different and different with pipe shape, numerical value unit
Stagnation pressure and static pressure pass 10 through stagnation pressure transfer hole 13 and Hydrostatic Transfer Device hole 14, valve group 2, condenser 3, three valve groups respectively and measure differential pressure to differential pressure transmitter 6.When measuring steam, the probe assembly level is installed, steam condensation in stagnation pressure transfer hole 13 and Hydrostatic Transfer Device hole 14, in stagnation pressure transfer hole 13 and Hydrostatic Transfer Device hole 14, have a vapour, liquid equilibrium point, there is the discrepancy in elevation 2 positions like this, then can bring extra differential pressure, when flow hour, the differential pressure of stagnation pressure and static pressure is little, and this extra differential pressure can cause bigger measuring error.And the probe assembly design is parallel and very thin with Hydrostatic Transfer Device hole 14 at stagnation pressure transfer hole 13, when the vapor-liquid equilibrium point changes, because of the probe assembly level is installed, can not bring extra differential pressure, have because very thin at stagnation pressure transfer hole 13 and Hydrostatic Transfer Device hole 14, liquid level is because capillary effect, and liquid that can not blows back in the pipeline and causes differential pressure fluctuation.Above measure makes differential pressure keep precision in transmittance process.
Probe 1 surface is through special coarse processing, and has the separating tank 19 of spill at probe, and when making fluid flow through probe and the burble point stationkeeping of probe, flow coefficient k is stable when guaranteeing fluctuations in discharge.Evidence, as long as guarantee the unanimity of physical dimension, the coefficient of flow of same specification probe reaches unanimity.
Probe 1, valve group 2, condenser 3, three valve groups pass 10 and vent valve 17, blowoff valve integrated design also stopped dimensional discrepancy in the installation process and the possibility of the extra influence that brings and the evaporating, emitting, dripping or leaking of liquid or gas that may occur.
Those skilled in the art can carry out other change and modification after reading the utility model patent specification, but these changes and modification are all within the claim protection domain that the utility model awaits the reply.
Claims (7)
1, a kind of integrated probe-type flowmeter, comprise the probe (1) that is installed in respectively on the detected fluid pipeline (11), condenser pipe (5), feeler lever (20), probe (1) is by differential pressure transmitter (6), power supply (8) is connected on the integrating instrument (9), condenser pipe (5) is by pressure unit (4), power supply (8) links to each other with integrating instrument (9), feeler lever (20) is connected on the integrating instrument (9) by temperature sensor (7), it is characterized in that: be connected with a valve group between described probe (1) and the differential pressure transmitter (6), this valve group comprises a valve group (2) that is linked in sequence successively, condenser (3), three valve groups (10), a valve group (2), condenser (3), three valve groups (10) are one.
2, integrated probe-type flowmeter according to claim 1, it is characterized in that: described probe (1) is welded on the valve group (2).
3, integrated probe-type flowmeter according to claim 1 is characterized in that: described condenser (3) top is provided with vent valve (17), transfers and is provided with blowoff valve.
4, integrated probe-type flowmeter according to claim 1, it is characterized in that: described probe (1) inside is provided with stagnation pressure transfer hole (13) and Hydrostatic Transfer Device hole (14), stagnation pressure transfer hole (13) is connected with the total pressure measurement hole (15) of probe (1) head, and Hydrostatic Transfer Device hole (14) are connected with the static bole (16) of probe (1) head.
5, integrated probe-type flowmeter according to claim 4 is characterized in that: described stagnation pressure transfer hole (13) is two parallel elongated hole with Hydrostatic Transfer Device hole (14).
6, integrated probe-type flowmeter according to claim 1 is characterized in that: described probe (1) outside surface is through coarse processing, and its head has separating tank (19).
7, integrated probe-type flowmeter according to claim 1 is characterized in that: described probe (1) is fixed on by flange (18) and is contained on the pipeline (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520133571 CN2814349Y (en) | 2004-12-02 | 2005-12-02 | Integrated probe type flow meter |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200420115898.9 | 2004-12-02 | ||
| CN200420115898 | 2004-12-02 | ||
| CN 200520133571 CN2814349Y (en) | 2004-12-02 | 2005-12-02 | Integrated probe type flow meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2814349Y true CN2814349Y (en) | 2006-09-06 |
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ID=36949436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520133571 Expired - Fee Related CN2814349Y (en) | 2004-12-02 | 2005-12-02 | Integrated probe type flow meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2814349Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871803A (en) * | 2010-06-28 | 2010-10-27 | 江阴市节流装置厂有限公司 | Integrated differential-pressure-type flow meter and application method thereof |
| CN103823037A (en) * | 2014-03-20 | 2014-05-28 | 武汉科技大学 | Pressurization system of container for simulating explosion test in deep water environments as well as using method thereof |
| CN105806421A (en) * | 2016-05-18 | 2016-07-27 | 中国航空工业集团公司西安飞机设计研究所 | Test pipeline |
| CN104729637B (en) * | 2015-02-03 | 2018-04-27 | 浙江工业大学 | A kind of turbine flowmeter on-line calibration system and calibration method |
| CN111442807A (en) * | 2020-05-08 | 2020-07-24 | 上海朝辉压力仪器有限公司 | High-sensitivity multi-parameter flow meter based on ZigBee network |
-
2005
- 2005-12-02 CN CN 200520133571 patent/CN2814349Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871803A (en) * | 2010-06-28 | 2010-10-27 | 江阴市节流装置厂有限公司 | Integrated differential-pressure-type flow meter and application method thereof |
| CN103823037A (en) * | 2014-03-20 | 2014-05-28 | 武汉科技大学 | Pressurization system of container for simulating explosion test in deep water environments as well as using method thereof |
| CN104729637B (en) * | 2015-02-03 | 2018-04-27 | 浙江工业大学 | A kind of turbine flowmeter on-line calibration system and calibration method |
| CN105806421A (en) * | 2016-05-18 | 2016-07-27 | 中国航空工业集团公司西安飞机设计研究所 | Test pipeline |
| CN105806421B (en) * | 2016-05-18 | 2019-05-24 | 中国航空工业集团公司西安飞机设计研究所 | A kind of test pipeline |
| CN111442807A (en) * | 2020-05-08 | 2020-07-24 | 上海朝辉压力仪器有限公司 | High-sensitivity multi-parameter flow meter based on ZigBee network |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060906 Termination date: 20141202 |
|
| EXPY | Termination of patent right or utility model |