CN113029547A - Portable gas fuel nozzle flow testing device and using method - Google Patents
Portable gas fuel nozzle flow testing device and using method Download PDFInfo
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- CN113029547A CN113029547A CN202110358682.3A CN202110358682A CN113029547A CN 113029547 A CN113029547 A CN 113029547A CN 202110358682 A CN202110358682 A CN 202110358682A CN 113029547 A CN113029547 A CN 113029547A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The present disclosure provides a portable gas fuel nozzle flow testing device, comprising: a portable box body; the flow measurement unit is arranged in the portable box body, and two ends of the flow measurement unit are respectively connected with the air source and the nozzle to be measured; and the measurement and control unit is connected with the flow measurement unit and used for controlling and acquiring parameter information of the gas flowing through the flow measurement unit so as to obtain the folded flow passing through the gas fuel nozzle. The problem that the nozzle flow measurement consumes long time is solved, and compressed air in a power plant is used as a test medium; the device can be directly used for measurement on equipment with the gas nozzle, the gas nozzle does not need to be detached, the operation is simple and convenient, and the measurement is accurate. The present disclosure also provides a method of using a portable gas fuel nozzle flow testing device.
Description
Technical Field
The disclosure relates to the technical field of fuel nozzles, in particular to a portable gas fuel nozzle flow testing device and a using method thereof.
Background
The Gas Turbine (Gas Turbine) is an internal combustion type power machine which takes continuously flowing Gas as a working medium to drive an impeller to rotate at a high speed and converts the energy of fuel into useful work, and is a rotary impeller type heat engine. The gas turbine has the simplest structure, and can embody a series of advantages of small volume, light weight, quick start, high power density, little or no cooling water and the like which are peculiar to the gas turbine. Many performance metrics of gas turbines, including thermoacoustic oscillation levels, power, efficiency, pollutant emission levels, hot end component life, etc., are related to the mixing and combustion of fuel and air in the combustion chamber. The fuel injection quantity of the nozzle and the fuel-air ratio of the combustion air are key parameters to be controlled during the operation of the gas turbine, and the nozzle is a key execution component in a fuel supply system of the gas turbine. In view of the above situation, in order to check the capability of the fuel nozzle to inject the fuel gas and ensure the stability and reliability of various performance indexes in the working process of the combustion engine, the flow rate of the nozzle must be detected under various pressure working conditions, and whether the product quality meets the design requirements or not is verified according to the through-flow capability of the internal flow passage of the fuel nozzle.
Gas fuels are used more and more frequently in engines due to their low price and good emissions, and gas turbines burning gaseous fuels are widely used in gas transmission pipelines, distributed power plants, coking plants, steel plants, oil field self-contained power stations, and other fields. In particular, many industrial users produce large quantities of industrial associated gas during their production, and burning these industrial "waste gases" or "associated gases" turns waste into valuable and adds economic value to the users, and in this context, many gas nozzles and combustors capable of burning specific component fuels come into play, including nozzles for diffusion combustion and also nozzles for premixed combustion. The method has important theoretical significance and engineering application value for developing research and inspection and test on the flow characteristics of the gas fuel nozzle.
The qualified flow rate is the premise that a newly processed fuel nozzle can be shipped from a factory, however, in the use process, the situation that the inner surface of a fuel spray hole is blocked due to carbon deposition, melt accumulation or high-temperature ablation along with the accumulation of the running time of an engine because impurities exist in fuel and compressed air more or less is found. Generally, the degree of clogging of each fuel nozzle is different, and the flow rate uniformity of the fuel nozzle exceeds the allowable deviation range, so that the gas turbine generates high-frequency vibration due to the uneven distribution of the fuel injection and the annular temperature field, and the emission is greatly increased, which is a great harm to the stable operation of the gas turbine. The early signs of nozzle blockage include that the dispersity of a combustion chamber outlet temperature field is increased, the output of an engine is reduced, the CO emission is increased and the like, so that the blockage degree of the fuel nozzle is detected, the fuel nozzle with the blockage exceeding the standard is screened out to be cleaned or replaced, and the method has important significance for ensuring the overall performance of the engine and prolonging the service life of the overall engine.
Therefore, it is important to perform flow detection, general maintenance and troubleshooting on the fuel nozzle during the whole life cycle of the fuel nozzle. Not only do these tasks require a significant amount of technical background, but they also place higher demands on the flow testing equipment. Currently, there are one or more of the following problems in the field of gas fuel nozzle flow measurement:
most of flow measuring devices of nozzle processing manufacturers are self-made fixed experimental equipment, and have different specification standards and low universality; meanwhile, a set of experiment table is provided for each nozzle with each flow specification, so that the occupied area is large, and the waste of resources is caused; the flow measuring device is inconvenient to carry, once the nozzle leaves a factory, the flow characteristic of the nozzle cannot be tracked or monitored rarely in the using process, and therefore technical iteration and design capacity improvement of a nozzle manufacturing unit cannot be well promoted.
At present, a using unit of combustion engine equipment does not have nozzle flow testing capacity, a nozzle is required to be detached to be sent to a professional detection mechanism or to be automatically detached to be measured by a detection device, and the method is long in time consumption, complex in operation and low in precision. There is a need for a portable flow sensing device that can be used to test the through-flow condition of a gas nozzle in a power plant gas turbine field of use using an external gas source without removing the gas nozzle.
Nozzle flow measurement typically uses compressed air or nitrogen instead of gaseous fuel, and the gaseous medium has characteristics that vary with changes in environmental conditions such as temperature and pressure, which results in inconsistent absolute flow for the same gaseous fuel nozzle measured at different seasons and different locations, and therefore often requires measurement of new unused fuel nozzles at the nozzle repair site to record the standard flow value. For example, patent document CN111413745A (application No. 202010367715.6) discloses a pneumatic system for detecting positive pressure of sonic nozzle and a method for screening clogging degree of fuel nozzle, which requires a new fuel nozzle without any clogging to be tested in the field to obtain a reference value of nozzle flow rate. Further, as disclosed in patent document CN111707324A (application No. 202010693692.8), an equivalent throttle device having a flow capacity equivalent to that of a fuel nozzle in an internal combustion engine is provided, and a new fuel nozzle is replaced by an orifice plate, which is essentially required to be tested in a field environment to obtain a flow reference value for determining whether the nozzle is clogged, and a method for measuring a flow reference value of the fuel nozzle. However, this has a problem: often the test site is unable to provide new fuel nozzles or a sufficient number of new fuel nozzles, and there is no orifice plate for equivalent replacement of a standard nozzle.
To date, there is no mature portable gas fuel nozzle flow measuring device in China. If the test system can be designed and developed, the detection quality and effect of the gas fuel nozzle can be obviously improved, the problems of large workload, long time consumption and the like in the traditional method for detecting the gas fuel nozzle by detaching the nozzle are solved, and the technical defect of China in the field of engine nozzle test is overcome.
Disclosure of Invention
Technical problem to be solved
Based on the above problems, the present disclosure provides a portable gas fuel nozzle flow testing device and a use method thereof, so as to alleviate technical problems of large workload, long time consumption and the like in the prior art, which require to detach a nozzle for detection.
(II) technical scheme
The present disclosure provides a portable gas fuel nozzle flow testing device, comprising:
a portable box body;
the flow measurement unit is arranged in the portable box body, and two ends of the flow measurement unit are respectively connected with the air source and the nozzle to be measured; and
and the measurement and control unit is connected with the flow measurement unit and used for controlling and acquiring parameter information of the gas flowing through the flow measurement unit so as to obtain the folded flow passing through the gas fuel nozzle.
In an embodiment of the present disclosure, the flow rate measurement unit includes:
the device comprises a gas source interface, a gas source pressure gauge, a ball valve, a gas filtering assembly, a pressure reducing valve, a pressure gauge behind the pressure reducing valve, a thermal gas mass flow controller, a precise flow regulating valve, a gas pressure stabilizing cavity, a differential pressure transmitter, a temperature digital display instrument and a gas fuel nozzle interface which are connected in sequence;
the air source interface is used for being connected with a high-pressure air source;
the air source pressure gauge is used for measuring the air supply pressure of the high-pressure air source;
the ball valve is used for adjusting the flow of the introduced gas;
the gas filtering component can filter impurities in gas;
the pressure reducing valve is used for reducing the pressure of the gas entering the pressure reducing valve to a set pressure and outputting the gas;
the pressure gauge behind the pressure reducing valve is used for measuring the pressure of the gas after pressure reduction;
the thermal gas mass flow controller is used for controlling the mass flow of the outflow gas;
the precise flow regulating valve is used for further regulating the mass flow of the gas passing through the precise flow regulating valve behind the thermal gas mass flow controller;
the gas pressure stabilizing cavity is used for stabilizing the pressure of the passing gas;
the differential pressure transmitter is used for measuring the density and the pressure of the passing gas;
the temperature digital display instrument is used for measuring the temperature of the passing gas; and
the gas fuel nozzle interface; used for connecting the nozzle to be tested.
Furthermore, the ball valve, the pressure reducing valve and the control end of the precise flow regulating valve are all arranged on the measurement and control unit.
In the embodiment of the disclosure, the measurement and control unit comprises a measurement and control panel and/or a data processing terminal;
the measurement and control panel is arranged on the box body and connected with the flow measurement unit; the data processing terminal is connected with the flow measuring unit through a data line and a data interface;
in the disclosed embodiment, the flow rate measurement unit calculates the mass flow rate by a reduced flow rate;
the calculation formula of the reduced flow is as follows:
In the formula: Δ P is the differential pressure between the nozzle inlet and outlet in kPa;
p2 is the nozzle outlet pressure, i.e. local ambient atmospheric pressure, in kPa;
p1 is the total nozzle inlet pressure in kPa;
t is the air medium temperature in units;
t is the total temperature of the air medium in K;
Qmeasured in factIs the real-time mass flow through the nozzle in g/s;
Qfolding deviceThe unit g s is the reduced flow through the nozzle-1*K0.5*kPa-1。
In an embodiment of the present disclosure, the data processing terminal includes:
the data acquisition module is used for receiving the flow information and storing the flow information to form data information;
the data processing module is used for receiving the data information and analyzing and processing the data information to form the processing data;
and the display module is used for receiving the processing data and displaying the processing data.
In an embodiment of the present disclosure, the data acquisition module includes:
the communication unit is connected with the portable flow test box through a data line and can receive the flow information;
and the storage unit can receive and store the flow information sent by the communication unit.
Further, the data processing terminal may be hand-held or box-type.
The present disclosure also provides a method of using the portable gas fuel nozzle flow testing device, comprising:
operation S1: carrying out system leak detection on the portable gas fuel nozzle flow testing device;
operation S2: recording zero drift of the portable gas fuel nozzle flow testing device;
operation S3: carrying out pressure regulation on the portable gas fuel nozzle flow testing device;
operation S4: data acquisition and display are carried out through the measurement and control unit;
operation S5: and carrying out data storage and output on the data obtained by the data acquisition.
In the disclosed embodiments, a portable gas fuel nozzle flow testing apparatus and method of use, wherein,
the operation S1 includes: connecting a high-pressure gas source pipeline with a gas source interface of a portable flow test box, and connecting a blocking ball valve at a gas fuel nozzle interface to enable the blocking ball valve to be in a closed state; connecting the data processing terminal with the portable flow testing box through a data line, and then turning on respective power supplies; opening the ball valve and the precision flow regulating valve to the maximum, then regulating the opening of the pressure reducing valve, filling the gas pressure stabilizing cavity with gas, stopping regulating the pressure reducing valve when the pressure delta P in the gas pressure stabilizing cavity reaches the set pressure, and completely closing the ball valve to block a high-pressure gas source to perform pressure maintaining for a set time;
the operation S2 includes: opening a blocking ball valve at the interface of the gas fuel nozzle to evacuate; meanwhile, the ball valve is continuously kept to be completely closed to block the high-pressure gas source, and a zero drift self-checking state of counting down the set time is carried out;
the operation S3 includes: all valves are adjusted to be closed, a nozzle to be tested is connected with a portable flow testing box, a ball valve is opened to the maximum, then the opening degree of a pressure reducing valve is adjusted, the reading of a pressure gauge behind the pressure reducing valve reaches a set value, and then a thermal gas mass flow controller and a precise flow adjusting valve are matched for use, so that the actual pressure of the nozzle inlet is the same as the target pressure;
the operation S4 includes: ambient atmospheric pressure, i.e. pressure P at the outlet of the gas fuel nozzle, measured by a digital atmospheric pressure gauge2The flow, pressure and temperature data are manually input into the data processing terminal, and then the data processing terminal displays the flow, pressure and temperature data returned from the portable flow testing box, and meanwhile, the converted flow value can be calculated and displayed in real time according to a built-in program.
The operation S5 includes: the method comprises the steps of recording measured flow, temperature, pressure and reduced flow data according to a fixed data format, generating a corresponding data file, naming the file name of the data file by a built-in program, copying the data through a PC (personal computer) and further analyzing the data.
(III) advantageous effects
According to the technical scheme, the portable gas fuel nozzle flow testing device and the using method disclosed by the invention have at least one or part of the following beneficial effects:
(1) the problem that the nozzle flow measurement consumes long time is solved, and compressed air in a power plant is used as a test medium;
(2) the device can be directly used for measurement on equipment with a gas nozzle, the gas nozzle does not need to be detached, the operation is simple and convenient, and the measurement is accurate;
(3) the whole set of portable gas fuel nozzle flow testing device is small in size, highly integrated in system, convenient to carry and high in universality; and
(4) the connection is efficient and reliable, the replacement is convenient, and the flow detection of fuel nozzles of different types can be realized.
Drawings
FIG. 1 is a schematic diagram of a portable gas fuel nozzle flow testing device according to an embodiment of the present disclosure.
FIG. 2 is a schematic diagram of a flow measurement unit of a portable gas fuel nozzle flow testing apparatus according to an embodiment of the present disclosure.
FIG. 3 is a flow chart of a method of using a portable gas fuel nozzle flow testing apparatus in accordance with an embodiment of the present disclosure.
Detailed Description
The utility model provides a portable gas fuel nozzle flow testing device, which solves the problem of long time consumption for nozzle flow measurement, and utilizes the compressed air in the power plant as the testing medium; the whole set of portable gas fuel nozzle flow testing device is small in size, highly integrated in system, convenient to carry and high in universality; the connection is efficient and reliable, the replacement is convenient, and the flow detection of fuel nozzles of different types can be realized.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
In an embodiment of the present disclosure, there is provided a portable gas fuel nozzle flow testing device, as shown in fig. 1 to 2, the preparation method including: a portable box body; the flow measurement unit is arranged in the portable box body, and two ends of the flow measurement unit are respectively connected with the air source and the nozzle to be measured; and the measurement and control unit is connected with the flow measurement unit and used for controlling and acquiring parameter information of the gas flowing through the flow measurement unit so as to obtain the folded flow passing through the gas fuel nozzle.
In an embodiment of the present disclosure, the flow rate measurement unit includes:
the device comprises a gas source interface, a gas source pressure gauge, a ball valve, a gas filtering assembly, a pressure reducing valve, a pressure gauge behind the pressure reducing valve, a thermal gas mass flow controller, a precise flow regulating valve, a gas pressure stabilizing cavity, a differential pressure transmitter, a temperature digital display instrument and a gas fuel nozzle interface which are connected in sequence;
the air source interface is used for being connected with a high-pressure air source;
the air source pressure gauge is used for measuring the air supply pressure of the high-pressure air source;
the ball valve is used for adjusting the flow of the introduced gas;
the gas filtering component can filter impurities in gas;
the pressure reducing valve is used for reducing the pressure of the gas entering the pressure reducing valve to a set pressure and outputting the gas;
the pressure gauge behind the pressure reducing valve is used for measuring the pressure of the gas after pressure reduction;
the thermal gas mass flow controller is used for controlling the mass flow of the outflow gas;
the precise flow regulating valve is used for further regulating the mass flow of the gas passing through the precise flow regulating valve behind the thermal gas mass flow controller;
the gas pressure stabilizing cavity is used for stabilizing the pressure of the passing gas;
the differential pressure transmitter is used for measuring the density and the pressure of the passing gas;
the temperature digital display instrument is used for measuring the temperature of the passing gas; and
the gas fuel nozzle interface; used for connecting the nozzle to be tested.
In the embodiment of the disclosure, the ball valve, the pressure reducing valve and the control end of the precise flow regulating valve are all arranged on the measurement and control unit.
In the embodiment of the disclosure, the measurement and control unit comprises a measurement and control panel and/or a data processing terminal; the measurement and control panel is arranged on the box body and connected with the flow measurement unit; the data processing terminal is connected with the flow measuring unit through a data line and a data interface;
specifically, a portable gas fuel nozzle flow testing device includes: portable flow test box and data processing terminal.
The high-pressure air source is a self-contained compressed air station and an air supply pipeline thereof of the nozzle processing plant or a compressed air station and an air supply pipeline thereof near the use site of the gas turbine. The high pressure air source may or may not include an air filtration device.
In the embodiment of the disclosure, the top of the box body of the portable flow test box is provided with a box cover which can be opened and closed, and the box cover is provided with a folding handle. Two buckle type spring locks are arranged on the front side surface of the box body and used for locking the box cover. The four corners of the bottom surface of the box body are provided with retention nuts, the inner threads of the retention nuts are connected with height adjusting blocks, and anti-skid rubber pads are arranged at the bottoms of the height adjusting blocks. The rear side surface of the box body is provided with a round or strip-shaped heat dissipation opening and a heat dissipation fan.
In the embodiment of the disclosure, the inside frame, power module, flow measurement unit, observing and controlling panel and film panel background light module that are provided with of box of portable flow test case.
The frame is connected with T-shaped bolts and nuts through aluminum profiles and corner pieces.
The power module, the flow measuring unit, the measurement and control panel and the film panel background light module are connected together through the rack.
The power modules include 220VAC and 24VDC power supplies.
The measurement and control panel is provided with a delta-shaped alternating current power supply socket and an alternating current power supply switch, and the power supply switch is a self-locking self-resetting button switch with an LED indicator lamp.
In the embodiment of the disclosure, the flow measurement unit comprises an air source interface, an air source pressure gauge, a ball valve, an air filtering component, a pressure reducing valve, a pressure gauge behind the pressure reducing valve, a thermal type air mass flow controller, a precise flow regulating valve, an air pressure stabilizing cavity, a differential pressure transmitter, a Pt100 thermal resistor and an air fuel nozzle interface which are sequentially connected by a polyurethane PU hose; all the gas circuit connecting joints are pneumatic quick-plugging joints which are reliable in connection and can be plugged and unplugged quickly.
In the embodiment of the disclosure, the flow measurement unit further comprises a flow display control instrument, a pressure digital display instrument and a temperature digital display instrument which are arranged on the measurement and control panel, and all of the flow display control instrument, the pressure digital display instrument and the temperature digital display instrument need a 220VAC power supply of the power supply module for supplying power.
The differential pressure transmitter requires a 24VDC power supply from the power module. The high-pressure end of the differential pressure transmitter is connected with the gas pressure stabilizing cavity, and the low-pressure end of the differential pressure transmitter is communicated with the ambient atmosphere.
The flow display controller is connected with the thermal gas mass flow controller and is used for controlling and displaying the real-time mass flow Q passing through the flow controllerMeasured in factIn units of g/s.
The pressure digital display instrument is connected with the differential pressure transmitter and is used for displaying the pressure in the gas pressure stabilizing cavity, namely the pressure difference delta P between the inlet of the gas fuel nozzle and the outlet of the gas fuel, and the unit is kPa.
The digital temperature display instrument is connected with the Pt100 thermal resistor and is used for displaying the temperature t of the air medium at the inlet of the gas fuel nozzle in unit ℃. The gas density compensation is carried out by measuring the gas temperature in real time, so that the calculation of the nozzle reduced flow is facilitated.
The flow measuring unit also comprises a digital atmospheric pressure gauge for measuring and displaying the ambient atmospheric pressure, i.e. the pressure P at the outlet of the gas fuel nozzle2In kPa.
In the disclosed embodiment, the gas filtering assembly includes a solid particle filter and a liquid filter, and dry and clean air is provided to the whole device through the gas filtering assembly.
In the embodiment of the disclosure, the gas source interface and the gas fuel nozzle interface are both arranged on the measurement and control panel and are through-plate type pneumatic quick connectors.
In the embodiment of the disclosure, the air source pressure gauge and the pressure gauge behind the pressure reducing valve are both arranged on the measurement and control panel and are pointer type pressure gauges with gauge discs.
In the embodiment of the disclosure, the ball valve, the pressure reducing valve and the precise flow regulating valve are all arranged on the measurement and control panel. The whole flow measurement unit ensures the stable pressure of the air source of the measurement device through the pressure reducing valve, the mass flow controller, the precise flow regulating valve and the gas pressure stabilizing cavity, so that the actual pressure of the nozzle inlet is as close as possible to the target pressure, and the error caused by pressure fluctuation is reduced.
In the embodiment of the disclosure, a reduced flow calculation method is provided, which can eliminate the influence of the medium temperature and the environmental pressure change on the flow measurement.
The calculation formula of the reduced flow is as follows:
In the formula: Δ P is the differential pressure between the nozzle inlet and outlet in kPa;
p2 is the nozzle outlet pressure, i.e. local ambient atmospheric pressure, in kPa;
p1 is the total nozzle inlet pressure in kPa;
t is the air medium temperature in units;
t is the total temperature of the air medium in K;
Qmeasured in factIs the real-time mass flow through the nozzle in g/s;
Qfolding deviceThe unit g s is the reduced flow through the nozzle-1*K0.5*kPa-1。
In an embodiment of the present disclosure, the data processing terminal includes: the data acquisition module is used for receiving the flow information and storing the flow information to form data information; and the data processing module is used for receiving the data information and analyzing and processing the data information to form the processing data.
In an embodiment of the present disclosure, the data processing terminal further includes:
and the display module is used for receiving the processing data and displaying the processing data.
In an embodiment of the present disclosure, the data acquisition module includes:
the communication unit is connected with the portable flow test box through a data line and can receive the flow information;
and the storage unit can receive and store the flow information sent by the communication unit.
Specifically, in the embodiment of the present disclosure, the measurement and control panel is further provided with an interface for transmitting data of flow, temperature, and pressure.
The measurement and control panel is an aluminum panel with the thickness of 3-4 mm, a thin film panel (also called a switch panel) is pasted on the measurement and control panel, a unit name and a logo of a user are printed on the thin film panel, the unit name has a specific font style and a specific color, and the logo has a specific pattern style and a specific color. The unit name and logo on the thin film panel are both processed in a semitransparent mode, and other areas are processed in an opaque mode.
The film panel background lamp module comprises a strip-shaped LED lamp, the color of the light can be yellow, white or other monochromatic light, and the light needs to be powered by a 220VAC power supply of the power supply module.
The visual effect of the measurement and control panel is as follows: when the portable flow test box is powered on and starts to operate, the unit name and the logo on the film panel can shine.
The measurement and control panel is also provided with a fixed mounting hole and is fixed with the aluminum profile rack through a T-shaped nut.
Observe and control the panel and still be provided with the screw hole, fix the handle on observing and controlling the panel through the screw hole to conveniently take out observing and controlling panel and frame from the box and carry out the subassembly change, for example change the hot type gas mass flow controller that the range matches according to the flow characteristic of the nozzle that awaits measuring.
In the embodiment of the present disclosure, the data processing terminal may be a handheld type or a box type.
In the embodiment of the present disclosure, when the data processing terminal is handheld, power is supplied through the battery module.
Specifically, in the embodiment of the present disclosure, the data processing terminal may be a handheld type or a box type.
The handheld data processing terminal is composed of a battery module, a communication unit, a data acquisition module, a storage unit, a data processing module and a display module, wherein the display module is a liquid crystal digital display screen.
And the data processing terminal is connected with a data transmission interface on the portable flow test box through a data line.
The data processing terminal can collect and display the flow, pressure and temperature data returned from the portable flow testing box in real time.
The data processing terminal can calculate and display the converted flow value in real time according to a built-in program.
The data processing terminal can store measured flow, temperature, pressure and reduced flow data according to a fixed data format to generate a corresponding data file, the file name of the data file is named by a built-in program, and the format is a digital string corresponding to the year, month, day, hour, minute and second.
The data processing terminal is also provided with a Type-C interface for charging and data output, and data can be copied out and further analyzed through a PC.
The portable flow test box can also operate off the data processing terminal. Calculating the total pressure P of the nozzle inlet required for the reduced flow1Nozzle outlet pressure (i.e., local atmospheric pressure) P2Total temperature T of the air working medium and actual mass flow Q through the nozzleMeasured in factCan be displayed by a digital display instrument on a measurement and control panel, and then the corresponding converted flow Q is obtained by manual calculationFolding device. Thereby increasing the flexibility of use of the device.
The present disclosure also provides a criterion for discriminating whether a used nozzle needs to be cleaned and replaced, which can be used when a new fuel nozzle cannot be provided for comparative analysis at a test site. The criteria include the following: under the same pressure ratio condition (the pressure ratio is defined as P)2/P1) If the deviation between the reduced flow value of the used nozzle and the reduced flow value of the new fuel nozzle exceeds +/-2.0%, the nozzle is judged to be unqualified and needs to be cleaned and replaced.
The present disclosure also provides a method of using the portable gas fuel nozzle flow testing device according to the above, as shown in fig. 3, including:
operation S1: carrying out system leak detection on the portable gas fuel nozzle flow testing device;
operation S2: recording zero drift of the portable gas fuel nozzle flow testing device;
operation S3: carrying out pressure regulation on the portable gas fuel nozzle flow testing device;
operation S4: data acquisition and display are carried out through the measurement and control unit;
operation S5: and carrying out data storage and output on the data obtained by the data acquisition.
Specifically, the present disclosure also provides a use method of the portable gas fuel nozzle flow testing device, which is characterized by comprising the following steps:
and (3) leak detection of the system: connecting a gas source pipeline with a gas source interface of the portable flow test box, and connecting a blocking ball valve at the gas fuel nozzle interface to enable the blocking ball valve to be in a closed state; connecting the data processing terminal with the portable flow testing box through a data line, and then turning on respective power supplies; firstly, opening the ball valve and the precision flow regulating valve to the maximum, then regulating the opening of the pressure reducing valve, filling the gas pressure stabilizing cavity with gas, stopping regulating the pressure reducing valve when the pressure delta P in the gas pressure stabilizing cavity reaches 0.3MPa, and completely closing the ball valve to block a high-pressure gas source; at the moment, a self-checking button on the data processing terminal is clicked, the system enters a pressure maintaining experimental state of counting down for 2min, and if the leakage occurrence amount is more than 2% of the initial pressure value in the period, a buzzer is sounded to give an alarm.
Recording the zero drift: opening a blocking ball valve at the interface of the gas fuel nozzle to evacuate after the leakage detection is finished; meanwhile, the ball valve is continuously maintained to be completely closed so as to block the high-pressure gas source; clicking a 'zero drift' button on a data processing terminal, firstly carrying out a zero drift self-checking state of countdown for 5s by the system, and if the zero drift amounts of flow, temperature and pressure exceed set values, sending out a buzzer sound to give an alarm; and if the flow rate does not exceed the set value, storing data, and finally, subtracting the zero drift when calculating the reduced flow rate.
Pressure regulation: firstly, all valves are adjusted to be in a closed state; connecting a gas fuel nozzle to be tested with a portable flow testing box, opening a ball valve to the maximum, and then adjusting the opening of a pressure reducing valve to enable the reading of a pressure gauge behind the pressure reducing valve to reach 0.2-0.4 MPa; then, the actual pressure of the nozzle inlet is made to be as close as possible to the target pressure by the cooperation of the thermal gas mass flow controller and the precise flow regulating valve.
Data acquisition and display: manually inputting the ambient atmospheric pressure measured by a digital atmospheric pressure gauge, namely the pressure P2 at the outlet of the gas fuel nozzle into a data processing terminal; then, the data processing terminal displays the flow, pressure and temperature data returned from the portable flow test box; meanwhile, the converted flow value can be calculated and displayed in real time according to a built-in program.
Data storage and output: clicking a 'storage' button on a data processing terminal, recording actually-measured flow, temperature, pressure and reduced flow data by the system according to a fixed data format, and generating a corresponding data file, wherein the file name of the data file is named by a built-in program and the format is a digital string corresponding to year, month, day, hour, minute and second; the data can then be copied out and further analyzed by the PC.
So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.
From the above description, those skilled in the art should have a clear understanding of the portable gaseous fuel nozzle flow testing apparatus and method of use of the present disclosure.
In conclusion, the portable gas fuel nozzle flow testing device and the using method thereof are provided, and the device reduces the influence of gas source pressure fluctuation on flow measurement and stabilizes the pressure of the nozzle inlet due to the arrangement of the pressure reducing and stabilizing valve in the portable testing box; the utility model discloses a longer problem consuming time of gas turbine nozzle flow measurement utilizes the inside compressed air of power plant to do the test medium, can directly open and measure between gas turbine, need not pull down the gas nozzle, has easy and simple to handle, measures accurate characteristics. The whole set of test system has small volume, high integration of the system, convenient carrying and strong universality. Meanwhile, the invention also provides a reduced flow calculation method which can eliminate the influence of medium temperature and environmental pressure change on flow measurement. When a new fuel nozzle cannot be provided for comparative analysis in a test field, the gas nozzle can also be detected, and a reliable basis is provided for fault diagnosis and general maintenance of the gas turbine fuel nozzle. This is disclosed through set up gas filtering component at the air inlet upper reaches, through solid particle filter and the liquid filter among the gas filtering component granule and the moisture that contains in the filtering gas, adopts two-stage filtration, has improved the purity of test gas, fully guarantees the detection precision. This no matter be between the inner line or all adopt quick-operation joint with being connected of external system, connect high-efficiently and reliably, and it is convenient to change, can realize the fuel nozzle's of different grade type jam and detect. The flow measuring instrument adopts a high-precision thermal gas mass flow controller, can directly detect the mass flow of gas, has a large detection range, does not need temperature and pressure compensation, and is convenient and accurate to measure.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Unless otherwise indicated, the numerical parameters set forth in the specification and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by the present disclosure. In particular, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". Generally, the expression is meant to encompass variations of ± 10% in some embodiments, 5% in some embodiments, 1% in some embodiments, 0.5% in some embodiments by the specified amount.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element or any ordering of one element from another or the order of manufacture, and the use of the ordinal numbers is only used to distinguish one element having a certain name from another element having a same name.
In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Also in the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A portable gas fuel nozzle flow testing apparatus, comprising:
a portable box body;
the flow measurement unit is arranged in the portable box body, and two ends of the flow measurement unit are respectively connected with the air source and the nozzle to be measured; and
and the measurement and control unit is connected with the flow measurement unit and used for controlling and acquiring parameter information of the gas flowing through the flow measurement unit so as to obtain the folded flow passing through the gas fuel nozzle.
2. The portable gaseous fuel nozzle flow testing apparatus of claim 1, wherein the flow measurement unit comprises:
the device comprises a gas source interface, a gas source pressure gauge, a ball valve, a gas filtering assembly, a pressure reducing valve, a pressure gauge behind the pressure reducing valve, a thermal gas mass flow controller, a precise flow regulating valve, a gas pressure stabilizing cavity, a differential pressure transmitter, a temperature digital display instrument and a gas fuel nozzle interface which are connected in sequence;
the air source interface is used for being connected with a high-pressure air source;
the air source pressure gauge is used for measuring the air supply pressure of the high-pressure air source;
the ball valve is used for adjusting the flow of the introduced gas;
the gas filtering component can filter impurities in gas;
the pressure reducing valve is used for reducing the pressure of the gas entering the pressure reducing valve to a set pressure and outputting the gas;
the pressure gauge behind the pressure reducing valve is used for measuring the pressure of the gas after pressure reduction;
the thermal gas mass flow controller is used for controlling the mass flow of the outflow gas;
the precise flow regulating valve is used for further regulating the mass flow of the gas passing through the precise flow regulating valve behind the thermal gas mass flow controller;
the gas pressure stabilizing cavity is used for stabilizing the pressure of the passing gas;
the differential pressure transmitter is used for measuring the density and the pressure of the passing gas;
the temperature digital display instrument is used for measuring the temperature of the passing gas; and
the gas fuel nozzle interface; used for connecting the nozzle to be tested.
3. The portable gas fuel nozzle flow testing device of claim 2, wherein the ball valve, the pressure reducing valve and the control end of the precision flow regulator are all disposed on the measurement and control unit.
4. A portable gas fuel nozzle flow testing device according to claim 3, wherein the instrumentation unit comprises an instrumentation panel and/or a data processing terminal;
the measurement and control panel is arranged on the box body and connected with the flow measurement unit; and the data processing terminal is connected with the flow measurement unit through a data line and a data interface.
5. The portable gas fuel nozzle flow testing device of claim 4, wherein the flow measurement unit calculates the mass flow by a reduced flow;
the calculation formula of the reduced flow is as follows:
In the formula: Δ P is the differential pressure between the nozzle inlet and outlet in kPa;
p2 is the nozzle outlet pressure, i.e. local ambient atmospheric pressure, in kPa;
p1 is the total nozzle inlet pressure in kPa;
t is the air medium temperature in units;
t is the total temperature of the air medium in K;
Qmeasured in factIs the real-time mass flow through the nozzle in g/s;
Qfolding deviceThe unit g s is the reduced flow through the nozzle-1*K0.5*kPa-1。
6. The portable gaseous fuel nozzle flow testing apparatus of claim 1, wherein the data processing terminal comprises:
the data acquisition module is used for receiving the flow information and storing the flow information to form data information;
the data processing module is used for receiving the data information and analyzing and processing the data information to form the processing data;
and the display module is used for receiving the processing data and displaying the processing data.
7. The portable gaseous fuel nozzle flow testing apparatus of claim 6, wherein the data acquisition module comprises:
the communication unit is connected with the portable flow test box through a data line and can receive the flow information;
and the storage unit can receive and store the flow information sent by the communication unit.
8. The portable gaseous fuel nozzle flow testing apparatus of claim 6, wherein the data processing terminal may be hand-held or box-style.
9. The method of using a portable gaseous fuel nozzle flow testing apparatus according to any one of claims 1-8, comprising:
operation S1: carrying out system leak detection on the portable gas fuel nozzle flow testing device;
operation S2: recording zero drift of the portable gas fuel nozzle flow testing device;
operation S3: carrying out pressure regulation on the portable gas fuel nozzle flow testing device;
operation S4: data acquisition and display are carried out through the measurement and control unit;
operation S5: and carrying out data storage and output on the data obtained by the data acquisition.
10. The method of using a portable gaseous fuel nozzle flow testing apparatus according to claim 9,
the operation S1 includes: connecting a high-pressure gas source pipeline with a gas source interface of a portable flow test box, and connecting a blocking ball valve at a gas fuel nozzle interface to enable the blocking ball valve to be in a closed state; connecting the data processing terminal with the portable flow testing box through a data line, and then turning on respective power supplies; opening the ball valve and the precision flow regulating valve to the maximum, then regulating the opening of the pressure reducing valve, filling the gas pressure stabilizing cavity with gas, stopping regulating the pressure reducing valve when the pressure delta P in the gas pressure stabilizing cavity reaches the set pressure, and completely closing the ball valve to block a high-pressure gas source to perform pressure maintaining for a set time;
the operation S2 includes: opening a blocking ball valve at the interface of the gas fuel nozzle to evacuate; meanwhile, the ball valve is continuously kept to be completely closed to block the high-pressure gas source, and a zero drift self-checking state of counting down the set time is carried out;
the operation S3 includes: all valves are adjusted to be closed, a nozzle to be tested is connected with a portable flow testing box, a ball valve is opened to the maximum, then the opening degree of a pressure reducing valve is adjusted, the reading of a pressure gauge behind the pressure reducing valve reaches a set value, and then a thermal gas mass flow controller and a precise flow adjusting valve are matched for use, so that the actual pressure of the nozzle inlet is the same as the target pressure;
the operation S4 includes: ambient atmospheric pressure, i.e. pressure P at the outlet of the gas fuel nozzle, measured by a digital atmospheric pressure gauge2The flow, pressure and temperature data returned from the portable flow test box are displayed by the data processing terminal, and the converted flow value can be calculated and displayed in real time according to a built-in program;
the operation S5 includes: the method comprises the steps of recording measured flow, temperature, pressure and reduced flow data according to a fixed data format, generating a corresponding data file, naming the file name of the data file by a built-in program, copying the data through a PC (personal computer) and further analyzing the data.
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