KR200342620Y1 - Apparatus for testing air leak for generator - Google Patents

Abstract

The present invention relates to an air leakage test apparatus for a generator, and measures the leakage of hydrogen gas, which is a cooling medium of the generator, by automation in real time, so as to immediately cope with the leakage and to increase the accuracy.

Air leakage test apparatus for a generator according to the present invention, the signal detection unit 10 for detecting a signal for detecting the pressure of hydrogen gas in the generator; In addition, the terminal 20 includes a built-in program for detecting a pressure change of the hydrogen gas based on a signal input from the signal detector. A terminal block 40 receiving the signal measured by the signal detector and supplying power to the signal detector; A signal collector (50) for collecting signals transmitted to the terminal block; The gateway 60 further stores a signal collected by the signal collector and transmits and receives the signal to and from the terminal.

Description

Air leakage tester for generators {APPARATUS FOR TESTING AIR LEAK FOR GENERATOR}

The present invention relates to an air leakage test apparatus for a generator, and more particularly, a generator for measuring a leak of hydrogen gas, which is a cooling medium of a generator, in real time and by automation to cope immediately with leakage and to improve accuracy. It relates to an air leakage test apparatus.

In general, a generator is connected to various turbines, and the generator rotates by the rotational force of the turbine to generate power. The generator generates power by overheating the winding part. The overheating of the winding part may cause damage to the generator. A cooling system for further cooling the heat is further employed.

The cooling system using the hydrogen gas cools this heat by filling and circulating hydrogen gas in the generator. In this process, the heated hydrogen gas is cooled in a hydrogen gas cooler installed in the generator and continuously circulated in the generator. While cooling the generator windings.

Meanwhile, even when the generator is in normal operation, hydrogen gas, which is a cooling medium, may leak. Thus, when hydrogen gas is leaked, a fire or explosion may occur outside the generator, and thus, it is determined in advance whether the hydrogen gas is leaked.

Hydrogen gas leak confirmation method according to the prior art, the operator through the hydrogen gas pressure gauge, for example, by measuring the pressure and temperature of the hydrogen gas one by one for each of the 10 measuring elements sequentially, the pressure of the hydrogen value is a constant value When it is below, it judges that hydrogen gas leaks and supplies hydrogen gas in a generator.

Hydrogen leakage checks by the operator's manual work are usually done by measuring and recording the hydrogen gas pressure every 1 hour (every 10 minutes at initial pressurization).

However, according to the hydrogen gas leakage confirmation method according to the prior art has the following problems.

In order to measure the exact value of hydrogen gas, it is necessary to measure several places at the same time, but it is impossible to measure at 10 places at the same time, so measurement error about hydrogen gas pressure is generated, and as a result, the hydrogen gas pressure in the generator can be accurately determined. There is a problem in accurately determining whether the generator leaks.

In addition, since the operator can not measure the pressure of the hydrogen gas from time to time by manually measuring the hydrogen gas, even if the hydrogen gas is leaked between the measurement period, there is also a disadvantage that can not be immediately dealt with.

In addition, since the operator moves directly to measure the hydrogen gas pressure, and the measured value must be recorded one by one, there is a disadvantage that excessive labor costs are used.

In addition, as the operator visually checks the pressure gauge and the like, the measured value may be incorrectly read due to the operator's carelessness, and thus, a large error is generated between the measured value and the actual value. can do.

The present invention is to solve the above-mentioned problems, and to provide an air leakage test apparatus for a generator that can accurately determine the leakage of hydrogen gas supplied into the generator.

In addition, another object of the present invention is to be able to measure the hydrogen gas from time to time to cope with the leakage of hydrogen gas.

Another object of the present invention is to perform a hydrogen gas leakage check in an automated process to reduce the workforce.

Another object of the present invention is to increase the reliability by the measured hydrogen gas value.

Another object of the present invention can be applied to leakage test of other facilities such as heat exchanger, tank, etc. in addition to generator hydrogen leakage measurement, and can be applied to places where monitoring and recording of temperature change trends are required.

1 is a block diagram of an air leakage test apparatus for a generator according to the present invention.

Figure 2 is a flow chart of the test method by the air leakage test for the generator according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: signal detection unit, 11: RTD temperature sensor

12: pressure sensor, 13: atmospheric pressure sensor

14: air temperature sensor, 20: terminal

30: power supply part, 40: terminal block

50: signal collector, 60: gateway

An air leakage test apparatus for a generator according to the present invention provided to achieve the above object includes a signal detection unit for detecting a signal for detecting a pressure of hydrogen gas in a generator; And a terminal having a built-in program for detecting a pressure change of the hydrogen gas based on a signal input from the signal detector. A terminal block receiving the signal measured by the signal detector and supplying power to the signal detector; A signal collector for collecting a signal transmitted to the terminal block; A gateway for storing the signal collected in the signal collector and transmit and receive to the terminal is further included.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, terms or words used in the present specification and claims are defined in the technical spirit of the present invention based on the principle that the inventor can appropriately define the concept of the term in order to best describe his or her own design. It must be interpreted to mean meanings and concepts.

As shown in FIG. 1, the air leakage test apparatus for a generator according to the present invention includes a signal detector 10 for detecting various signals for measuring a leak rate of hydrogen gas, and a signal detected by the signal detector 10. The terminal 20 includes a terminal 20 having a program for detecting a pressure change in the hydrogen gas pipe and detecting a leakage of hydrogen gas, and a power supply 30 for supplying power to the signal detector 10.

The signal detector 10 may include a resistance temperature sensor (RTD) 11, a pressure sensor 12 in hydrogen gas, an atmospheric pressure sensor 13, and an atmospheric temperature sensor 14. The RTD temperature sensor 11 may be one that is already applied to the generator, and for this purpose, the circuit of the RTD temperature sensor 11 is connected to the signal detector 10.

The terminal 20 detects leakage of hydrogen gas in real time based on a signal detected by the signal detector 10 (change in pressure after the hydrogen gas pipe is pressurized by air of a constant pressure by the air supply device). The program converts the leakage rate and outputs it, and in some cases, a program for driving an alarm device for notifying the leakage of the hydrogen gas when the hydrogen gas leaks. The terminal 20 may use Microsoft Windows XP as an operating system, and performs reception and storage of measurement data, analysis of received data and graph output (screen, printer), and database of received data.

Various data detected by the signal detector 10 are input to a program of the terminal 20 through the following apparatus. For example, the terminal block 40 which receives the signal detected by the signal detector 10 and transmits it to the signal collector 50 which will be described later, is connected to the terminal block 40 to collect the signal input to the terminal block 40 Reconstruct or change the signal collector (data acquisition, DAQ) 50, the signal collector 50 and the terminal 20 is connected to store the signal collected by the signal collector 50 and transmit and receive to the program of the terminal 20 It may consist of a gateway 60.

The signal collector 50 is composed of a power module, a measurement module (temperature, pressure), a CPU module, and an interface module. The power module receives external power through the power supply unit 30 to supply power used in various modules, and the measurement module converts an analog signal input from the terminal block 40 into a digital signal.

The gateway 60 transmits the digital signal converted from the measurement module of the signal collector 50 to the analysis terminal 20, and is provided with an LCD and function keys (MENU, OK, CANCEL, UP, DOWN, etc.). Can be set. Functions available using the function keys are status check function for each channel, OFFSET setting for each channel, trigger data setting for each channel, etc., and are stored in nonvolatile memory.

Hereinafter, the leakage test method by the generator air leakage test apparatus according to the present invention.

(S100) Signal detection unit 10 is connected. RTD 12, atmospheric pressure sensor 13, and atmospheric temperature sensor 14 in the hydrogen gas pipe are connected to the input of the terminal block 40, respectively, and are used in the generator to detect the temperature in the hydrogen gas pipe. The circuit of the temperature sensor 11 is connected to the input of the terminal 40, and a pressure gauge for checking the pressure in the hydrogen gas pipe is provided.

(S200) hydrogen gas pipe pressurization. Pressurize the hydrogen gas pipe by supplying air at a constant pressure inside the hydrogen gas pipe using a separately provided air supply device, and check the pressure through a pressure gauge.

(S300) Maintain pressure in hydrogen gas pipe. When the inside of the hydrogen gas pipe is pressurized to a certain pressure, the supply of air is stopped to close the hydrogen gas pipe. In this case, the pressure in the hydrogen gas pipe is not limited to a numerical value, but is described as a constant pressure. Therefore, the leak test method according to the air leakage test apparatus according to the present invention detects the leak rate based on the pressure change trend against the input pressure. Because there is no need. In the above (S200) and (S300) step has been described as the operator to visually check the supply / supply, but the supply / block of air by the pressure sensor may be made automatically.

(S400) Hydrogen gas leak rate detection. (S300) As the data for the leak rate detection in the state of maintaining the pressure inside the hydrogen gas pipe through the pressure maintaining step in the hydrogen gas pipe, the pressure in the hydrogen gas pipe, the temperature resistance thermometer temperature through the pressure sensor 12 installed in the generator hydrogen pipe Temperature from the sensor 11, atmospheric pressure from the atmospheric pressure sensor 13, temperature from the atmospheric temperature sensor 14, and the like are detected, and the detection data is passed through the terminal block 40, the signal collector 50, and the gateway 60. The program input to the terminal 20 and the program of the terminal 20 detects a leak rate through, for example, a pressure change trend input for each time. The leak rate may be expressed along with the generator pressure, the generator average temperature, the atmospheric pressure, and the ambient temperature to determine the leak rate according to the generator's internal / external conditions.

The data being acquired during the air leakage test may be represented by a graph and temperature / pressure data as shown in FIG. 3, and may be output in a tabular form as shown in FIG. 4 when the test is completed. It can also be output in the form.

The leak test is conducted in real time and online. The operator can check the leak rate input in real time. If necessary, the leak rate can be searched and utilized. Is generated.

(S500) decompression step. When the leak rate detection is completed, the exhaust valve can be opened to reduce the pressure in the hydrogen gas pipe and then the equipment can be removed.

Therefore, a variable is simultaneously measured in a plurality of sensor units 11, 12, 13, and 14 installed in various parts, and thus the leak rate may be detected based on data of various parts simultaneously inputted when calculating the leak rate.

In addition, since a signal is input to the signal input unit 10 in real time, and the terminal 20 detects and outputs a leak rate in real time through the input signal, the operator does not need to test the test cycle.

In addition, the leak rate is detected by automation so that there is no inconvenience of measuring and recording by hand while the worker moves to detect the leak rate as in the prior art.

In addition, the leak rate is automatically calculated and output as a numerical value, thereby preventing the phenomenon of incorrect reading or erroneous reading of numerical values measured by a worker's carelessness as in the prior art.

As described above, according to the air leakage test apparatus for a generator according to the present invention, in order to increase the accuracy of the leak rate test, the operator can measure a number of variables simultaneously without detecting the leak rate while moving along the hydrogen gas pipe. The accuracy of the measurement can be increased.

In addition, since the leak rate can be measured in real time to deal with leakage immediately, as a result, damage to the generator and occurrence of fire can be prevented.

In addition, since the operator can detect the leak rate while operating the terminal and check the output data, it is possible to minimize the workforce, thereby significantly reducing the labor cost.

In addition, as the leak rate is automatically recorded, it is possible to increase the accuracy and reliability due to carelessness of the operator.

In addition, since it can be used in other equipment that requires a leakage test in addition to the generator, there is an effect that can increase the utilization of the equipment.

The invention has been described and illustrated in connection with a preferred embodiment for illustrating the principles of the invention, but the invention is not limited to the configuration and operation as shown and described. Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims. Accordingly, all such suitable changes, modifications, and equivalents should be considered to be within the scope of the present invention.

Claims (3)

A signal detector 10 which detects a signal for detecting a pressure of hydrogen gas in the generator; And a terminal (20) having a built-in program for detecting a pressure change of the hydrogen gas based on a signal input from the signal detector. The method of claim 1, wherein the signal detection unit, the RTD temperature sensor 11 for measuring the temperature in the generator, the pressure sensor 12 for measuring the pressure in the hydrogen gas, the atmospheric pressure sensor 13 and the atmospheric temperature sensor Air leakage test device for a generator, characterized in that (14). 3. The terminal of claim 1 or 2, further comprising: a terminal block (40) receiving a signal measured by the signal detector and supplying power to the signal detector; A signal collector (50) for collecting signals transmitted to the terminal block; Generator for air leakage test device characterized in that it comprises a gateway for storing and transmitting and receiving the signal collected in the signal collector to the terminal.