CN109633206B - Simulation test system and method for uranium hexafluoride gas flow direction protection sensor - Google Patents
Simulation test system and method for uranium hexafluoride gas flow direction protection sensor Download PDFInfo
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- CN109633206B CN109633206B CN201710928898.2A CN201710928898A CN109633206B CN 109633206 B CN109633206 B CN 109633206B CN 201710928898 A CN201710928898 A CN 201710928898A CN 109633206 B CN109633206 B CN 109633206B
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- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000004088 simulation Methods 0.000 title claims abstract description 32
- SANRKQGLYCLAFE-UHFFFAOYSA-H uranium hexafluoride Chemical compound F[U](F)(F)(F)(F)F SANRKQGLYCLAFE-UHFFFAOYSA-H 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 15
- 238000012544 monitoring process Methods 0.000 claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 154
- 238000001514 detection method Methods 0.000 claims description 19
- 230000008859 change Effects 0.000 claims description 15
- 230000000694 effects Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims 1
- 238000010998 test method Methods 0.000 abstract description 5
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 9
- 229910052770 Uranium Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 238000011112 process operation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005372 isotope separation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a uranium hexafluoride gas flow direction protection sensor simulation test system, which comprises a gas steel cylinder, a gas pressure reducing valve and a gas pressure regulating valve, wherein the gas steel cylinder is used for containing simulation gas for replacing uranium hexafluoride gas, and the discharge pressure of the simulation gas is regulated through the gas pressure reducing valve; a vacuum measuring tank having a volume of V1, in which a pressure monitor A monitors a pressure P1 of a gas in the tank; the vacuum chamber has a volume of V2, the pressure of gas in the vacuum chamber is monitored by a pressure monitoring instrument B, the pressure P2 is monitored, and a protection sensor interface is arranged above the vacuum chamber and used for inserting a protection sensor; the vacuum pump is used for pumping out gas in the test system to enable the inside to reach a vacuum state; also comprises a valve A, a valve B, a valve C, a valve D and a valve E. The invention also discloses a test method of the uranium hexafluoride gas flow direction protection sensor simulation test system. The invention solves the problem that the uranium hexafluoride gas flow direction sensor has no test method and test device.
Description
Technical Field
The invention belongs to the field of uranium isotope centrifugal separation, and particularly relates to a simulation test system and method for a uranium hexafluoride gas flow direction protection sensor.
Background
In the centrifugal cascade process of uranium isotopes, a gas flow direction accident protection sensor for measuring the flow direction of process media is arranged in a system, which is a key important device for protecting the production process of the process. The gas flow direction accident protection sensor mainly has the function of detecting the flow direction of a gas medium, when fluid in a forbidden direction exists, the sensor outputs a response electric signal, a corresponding valve is closed through a control system, and the fluid is cut off, so that important equipment of a cascade process system is protected. The sensor is a special sensor used in the production process of the uranium separation process, and at present, corresponding measurement test standards and test devices are not available at home and abroad.
The gas flow direction accident protection sensor is in a plug-in mounting mode, a sensitive part of the gas flow direction accident protection sensor is embedded into a sealed pipeline and is in direct contact with a medium to be detected, the sensor and a process pipeline cannot be independently disconnected, the medium operation pressure in the pipeline is in a negative pressure state, and leakage cannot occur due to strict sealing requirements. In the use process, the sensor is easy to drift, unstable in operation, damaged in the heating element and the sensitive element and the like, when the sensor is damaged and replaced, part of process lines need to be interrupted, and the influence on normal production is large.
In order to ensure that the sealing performance, the function, the technical parameters and the like of the gas flow direction protection sensor installed in a process operation system meet the requirements, a testing device of the gas flow direction protection sensor is specially designed, the sealing performance, the function and the technical parameters of the newly processed gas flow direction protection sensor are tested, and qualified products are selected for a production process.
Disclosure of Invention
The invention aims to: the system and the method for simulating and testing the uranium hexafluoride gas flow direction protection sensor ensure that indexes such as sealing performance, functions, technical parameters and the like of the gas flow direction protection sensor installed in a process operation system meet process use requirements, and provide reliable detection equipment for a uranium isotope separation process.
The technical scheme of the invention is as follows:
a simulation test system for a uranium hexafluoride gas flow direction protection sensor comprises a gas steel cylinder, a gas pressure reducing valve and a gas pressure regulating valve, wherein the gas steel cylinder is used for containing simulation gas replacing uranium hexafluoride gas, and the discharge pressure of the simulation gas is regulated through the gas pressure reducing valve; a vacuum measuring tank having a volume of V1, in which a pressure monitor A monitors a pressure P1 of a gas in the tank; the vacuum chamber has a volume of V2, the pressure of gas in the vacuum chamber is monitored by a pressure monitoring instrument B, the pressure P2 is monitored, and a protection sensor interface is arranged above the vacuum chamber and used for inserting a protection sensor; the vacuum pump is used for pumping out gas in the test system to enable the inside to reach a vacuum state; the device also comprises a valve A, a valve B, a valve C, a valve D and a valve E;
the connection mode of all the devices is pipeline connection, wherein the gas pressure reducing valve is connected with a vacuum metering tank, the vacuum metering tank is respectively connected with the lower end of a valve A and the left end of a valve C, the upper end of the valve A is respectively connected with the left side of a vacuum chamber and the upper end of a valve D, the right side of the vacuum chamber is respectively connected with the right end of the valve C and the right end of the valve B, the left end of the valve B is connected with the right end of a valve E after being connected with the lower end of the valve D, and the left end of the valve E is connected with a vacuum pump;
the protection sensor, the pressure monitoring instrument A and the pressure monitoring instrument B are respectively connected with an external detection device and transmit signals to the detection device; the detection device comprises a signal collection card and a monitoring computer, and has the functions of detecting, displaying, recording and calculating related signals.
When the simulated gas is tested to flow in the positive direction, namely the simulated gas flows from left to right in the vacuum chamber, the valve A, the valve B and the valve E are opened, and the valve C and the valve D are closed; opening the gas pressure reducing valve, the analog gas enters the vacuum measuring tank, the pressure P1 of the gas in the vacuum measuring tank is monitored by the pressure monitoring instrument A, the gas enters the vacuum chamber after passing through the valve A, the pressure P2 of the gas in the vacuum chamber is monitored by the pressure monitoring instrument B, and the analog gas is discharged by the vacuum pump after passing through the valve B and the valve E.
When the test simulation gas flows reversely, namely the simulation gas flows from right to left in the vacuum chamber, the valve C, the valve D and the valve E are opened, and the valve A and the valve B are closed; the gas pressure reducing valve is opened, the simulated gas enters the vacuum measuring tank, the pressure P1 of the gas in the vacuum measuring tank is monitored by the pressure monitoring instrument A, the simulated gas enters the vacuum chamber after passing through the valve C, the pressure P2 of the gas in the vacuum chamber is monitored by the pressure monitoring instrument B, and the simulated gas is discharged by the vacuum pump after passing through the valve D and the valve E after coming out of the vacuum chamber.
The simulation gas is nitrogen or carbon dioxide.
The valve A, the valve B, the valve C, the valve D and the valve E are electromagnetic valves.
The invention relates to a test method for a uranium hexafluoride gas flow direction protection sensor simulation test system, which comprises the following steps:
first, inserting a protection sensor, starting the detection device
Inserting a protection sensor into a protection sensor interface, connecting through a flange, and sealing the connection position; turning on a power supply, supplying power to the protection sensor, the pressure monitoring instrument A, the pressure monitoring instrument B and the detection device, and starting the detection device;
second, checking the tightness of the test system
When the positive gas flow effect is tested, opening the valve A, the valve B and the valve E, and closing the valve C, the valve D and the gas pressure reducing valve;
when the effect of reverse gas flow is tested, opening the valve C, the valve D and the valve E, and closing the valve A, the valve B and the gas pressure reducing valve;
starting a vacuum pump to pump air, after the pressure P2 in a vacuum chamber is reduced to be below 5Pa, stopping the vacuum pump for 5 minutes, observing the change of the output signals U of the P2 and the protection sensor, adjusting a zero setting knob of the protection sensor when the P2 rises to be no more than 10Pa and the output signal U of the protection sensor does not change any more, enabling the output signal U to be in the range of 3-8 mV, observing for 5 minutes, and when the fluctuation of the output signal U is less than 1 mV/minute, ensuring the sealing performance of the testing device to meet the requirement and enabling the zero point adjustment of the sensor to meet the requirement;
thirdly, establishing the relation between the output signal U and the gas flow velocity v
When the positive gas flow effect is tested, opening the valve A, the valve B and the valve E, and closing the valve C and the valve D;
when the effect of reverse gas flow is tested, opening the valve C, the valve D and the valve E, and closing the valve A and the valve B;
opening a gas reducing valve to flush simulated gas into the vacuum metering tank, recording pressure values P1 and P2, observing the change of an output signal U of the protection sensor under the action of forward gas flow, and after a period of time t; calculating the flow velocity v through pressure values P1 and P2 recorded by a computer and signal change time t, and selecting the maximum value of an output signal U of a protection sensor;
adjusting the gas pressure reducing valve to make the gas pressure entering the vacuum metering tank different, respectively recording pressure values P1 and P2 and signal change time t, calculating flow velocity v, and respectively selecting the maximum value of the output signal U of the protection sensor; and respectively establishing the corresponding relation between the flow velocity v of the forward gas flow and the flow velocity v of the reverse gas flow and the maximum value of the output signal U of the protection sensor.
The invention has the following remarkable effects:
1) the technology is initiated at home, fills the blank of the sensor in the test field, and solves the problem that the uranium hexafluoride gas flow direction sensor has no test method and test device;
2) an industrial standard with the proprietary intellectual property rights of China is established in the field, and a reliable basis is provided for subsequent engineering design and implementation;
3) obtaining gas with different flow rates required by testing by controlling different pressures of the metering tanks by using a gas state equation;
4) the simulated gas replaces uranium hexafluoride to carry out sensor testing safely and feasible, and the testing function and technical index achieve the expected purpose.
Drawings
FIG. 1 is a schematic diagram of a simulation test system for a uranium hexafluoride gas flow direction protection sensor according to the present invention;
in the figure: 1. the pressure monitoring device comprises valves A, 2, B, 3, C, 4, D, 5, E, 6, a vacuum pump, 7, a gas steel cylinder, 8, a protective sensor interface, 9, a vacuum chamber, 10, a vacuum metering tank, 11, pressure monitoring instruments A and 12 and a pressure monitoring instrument B.
Detailed Description
The simulation test system and method for the uranium hexafluoride gas flow direction protection sensor according to the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A simulation test system for a uranium hexafluoride gas flow direction protection sensor comprises a gas steel cylinder 7, a gas pressure reducing valve 11, a gas pressure sensor and a gas pressure sensor, wherein the gas steel cylinder 7 is used for containing simulation gas replacing uranium hexafluoride gas, and the discharge pressure of the simulation gas is adjusted through the gas pressure reducing valve 11; a vacuum measuring tank 10 having a volume of V1, the pressure P1 of the gas in the tank being monitored by a pressure monitor A12; a vacuum chamber 9 with a volume of V2, the pressure P2 of the gas in the vacuum chamber is monitored by a pressure monitoring instrument B13, and a protective sensor interface 8 is arranged above the vacuum chamber 9 and used for inserting a protective sensor; the vacuum pump 6 is used for pumping out gas in the test system to enable the inside to reach a vacuum state; also comprises a valve A1, a valve B2, a valve C3, a valve D4 and a valve E5;
the connection mode of all the devices is pipeline connection, wherein a gas reducing valve 11 is connected with a vacuum metering tank 10, the vacuum metering tank 10 is respectively connected with the lower end of a valve A1 and the left end of a valve C3, the upper end of the valve A1 is respectively connected with the left side of a vacuum chamber and the upper end of a valve D4, the right side of the vacuum chamber is respectively connected with the right end of the valve C3 and the right end of a valve B2, the left end of the valve B2 is connected with the lower end of the valve D4 and then connected with the right end of the valve E5, and the left end of the valve E5 is connected with a vacuum pump 6;
the protection sensor, the pressure monitoring instrument A12 and the pressure monitoring instrument B13 are respectively connected with an external detection device and transmit signals to the detection device; the detection device comprises a signal collection card and a monitoring computer, and has the functions of detecting, displaying, recording and calculating related signals.
When the test simulation gas flows in the positive direction, namely the simulation gas flows from left to right in the vacuum chamber, the valve A1, the valve B2 and the valve E5 are opened, and the valve C3 and the valve D4 are closed; the gas pressure reducing valve 11 is opened, the pseudo gas enters the vacuum measuring tank 10, the pressure P1 of the gas in the vacuum measuring tank 10 is monitored by a pressure monitoring instrument a12, the gas enters the vacuum chamber 9 after passing through a valve a1, the pressure P2 of the gas in the vacuum chamber 9 is monitored by a pressure monitoring instrument B13, and the pseudo gas is discharged from the vacuum chamber 9 through a valve B2 and a valve E5 and then discharged by the vacuum pump 6.
When the test simulation gas reversely flows, namely the simulation gas flows from right to left in the vacuum chamber, the valve C3, the valve D4 and the valve E5 are opened, and the valve A1 and the valve B2 are closed; the gas pressure reducing valve 11 is opened, the dummy gas enters the vacuum measuring tank 10, the pressure P1 of the gas in the vacuum measuring tank 10 is monitored by the pressure monitor a12, the gas enters the vacuum chamber 9 through the valve C3, the pressure P2 of the gas in the vacuum chamber 9 is monitored by the pressure monitor B13, and the dummy gas is discharged from the vacuum chamber 9 through the valve D4 and the valve E5 and then discharged by the vacuum pump 6.
The simulation gas is nitrogen or carbon dioxide.
The valve A1, the valve B2, the valve C3, the valve D4 and the valve E5 are electromagnetic valves.
The invention relates to a test method for a uranium hexafluoride gas flow direction protection sensor simulation test system, which comprises the following steps:
first, inserting a protection sensor, starting the detection device
Inserting a protection sensor into the protection sensor interface 8, connecting through a flange, and sealing the connection position; turning on a power supply, supplying power to the protection sensor, the pressure monitoring instrument A12, the pressure monitoring instrument B13 and the detection device, and starting the detection device;
second, checking the tightness of the test system
When testing the effect of the positive gas flow, valve a1, valve B2 and valve E5 were opened, valve C3, valve D4 and gas relief valve 11 were closed;
when the effect of the reverse gas flow is tested, the valve C3, the valve D4, the valve E5 are opened, and the valve a1, the valve B2 and the gas pressure reducing valve 11 are closed;
starting a vacuum pump 6 to pump air, after the pressure P2 in a vacuum chamber 9 is reduced to be below 5Pa, stopping the vacuum pump 6 for 5 minutes, observing the change of output signals U of a P2 and a protection sensor, adjusting a zero setting knob of the protection sensor when the P2 rises to be not more than 10Pa and the output signal U of the protection sensor does not change any more, enabling the output signal U to be within the range of 3-8 mV, observing for 5 minutes, and when the fluctuation of the output signal U is less than 1 mV/minute, ensuring the sealing performance of the testing device to meet the requirement and enabling the zero point adjustment of the sensor to meet the requirement;
thirdly, establishing the relation between the output signal U and the gas flow velocity v
When testing the effect of the positive gas flow, valve a1, valve B2, and valve E5 were opened, valve C3, valve D4 were closed;
when the effect of the reverse gas flow is tested, the valve C3, the valve D4, the valve E5 are opened, and the valve A1 and the valve B2 are closed;
opening a gas reducing valve 11 to flush simulated gas into the vacuum metering tank 10, recording pressure values P1 and P2, observing the change of an output signal U of the protection sensor under the action of forward gas flow, and after a period of time t; calculating the flow velocity v through pressure values P1 and P2 recorded by a computer and signal change time t, and selecting the maximum value of a sensor output signal U;
adjusting the gas pressure reducing valve 11 to make the gas pressure entering the vacuum metering tank 10 different, respectively recording pressure values P1 and P2 and signal change time t, calculating the flow velocity v, and respectively selecting the maximum value of the output signal U of the protection sensor; and respectively establishing the corresponding relation between the flow velocity v of the forward gas flow and the flow velocity v of the reverse gas flow and the maximum value of the output signal U of the protection sensor.
Claims (4)
1. The utility model provides a uranium hexafluoride gas flow direction protection sensor simulation test system which characterized in that: the testing system comprises a gas steel cylinder (7) for containing simulated gas for replacing uranium hexafluoride gas, and the discharge pressure of the simulated gas is adjusted through a gas pressure reducing valve (11); a vacuum measuring tank (10) having a volume of V1, the pressure P1 of the gas in the tank being monitored by a pressure monitor A (12); a vacuum chamber (9) with a volume of V2, wherein the pressure of gas in the vacuum chamber is monitored by a pressure monitoring instrument B (13) and P2, and a protection sensor interface (8) is arranged above the vacuum chamber (9) and used for inserting a protection sensor; the vacuum pump (6) is used for pumping out gas in the test system to enable the inside to reach a vacuum state; the device also comprises a valve A (1), a valve B (2), a valve C (3), a valve D (4) and a valve E (5);
the connection mode of all the devices is pipeline connection, wherein a gas reducing valve (11) is connected with a vacuum metering tank (10), the vacuum metering tank (10) is respectively connected with the lower end of a valve A (1) and the left end of a valve C (3), the upper end of the valve A (1) is respectively connected with the left side of a vacuum chamber and the upper end of a valve D (4), the right side of the vacuum chamber (9) is respectively connected with the right end of the valve C (3) and the right end of a valve B (2), the left end of the valve B (2) is connected with the right end of a valve E (5) after being connected with the lower end of the valve D (4), and the left end of the valve E (5) is connected with a vacuum pump (6);
the protection sensor, the pressure monitoring instrument A (12) and the pressure monitoring instrument B (13) are respectively connected with an external detection device and transmit signals to the detection device; the detection device comprises a signal collection card and a monitoring computer, and has the functions of detecting, displaying, recording and calculating related signals;
when the forward flow of the simulated gas is tested, namely the simulated gas flows from left to right in the vacuum chamber, the valve A (1), the valve B (2) and the valve E (5) are opened, and the valve C (3) and the valve D (4) are closed; opening a gas reducing valve (11), enabling the simulated gas to enter a vacuum metering tank (10), monitoring the pressure P1 of the gas in the vacuum metering tank (10) by a pressure monitoring instrument A (12), entering a vacuum chamber (9) after passing through a valve A (1), monitoring the pressure P2 of the gas in the vacuum chamber (9) by a pressure monitoring instrument B (13), enabling the simulated gas to pass through a valve B (2) and a valve E (5) after coming out of the vacuum chamber (9), and discharging the simulated gas by a vacuum pump (6);
when the test simulation gas reversely flows, namely the simulation gas flows from right to left in the vacuum chamber, the valve C (3), the valve D (4) and the valve E (5) are opened, and the valve A (1) and the valve B (2) are closed; a gas pressure reducing valve (11) is opened, the simulated gas enters a vacuum measuring tank (10), the pressure P1 of the gas in the vacuum measuring tank (10) is monitored by a pressure monitoring instrument A (12), the simulated gas enters a vacuum chamber (9) after passing through a valve C (3), the pressure P2 of the gas in the vacuum chamber (9) is monitored by a pressure monitoring instrument B (13), and the simulated gas is discharged from the vacuum chamber (9) after passing through a valve D (4) and a valve E (5) and then by a vacuum pump (6).
2. The uranium hexafluoride gas flow direction protection sensor simulation test system of claim 1, wherein: the simulation gas is nitrogen or carbon dioxide.
3. The uranium hexafluoride gas flow direction protection sensor simulation test system of claim 1, wherein: the valve A (1), the valve B (2), the valve C (3), the valve D (4) and the valve E (5) are electromagnetic valves.
4. A method for testing a uranium hexafluoride gas flow direction protection sensor simulation test system according to claim 1, comprising the steps of:
first, inserting a protection sensor, starting the detection device
Inserting a protection sensor into a protection sensor interface (8), connecting through a flange, and sealing the connection part; turning on a power supply, supplying power to a protective sensor, a pressure monitoring instrument A (12), a pressure monitoring instrument B (13) and a detection device, and starting the detection device;
second, checking the tightness of the test system
When testing the positive gas flow effect, opening the valve A (1), the valve B (2) and the valve E (5), and closing the valve C (3), the valve D (4) and the gas reducing valve (11);
when the effect of reverse gas flow is tested, the valve C (3), the valve D (4) and the valve E (5) are opened, and the valve A (1), the valve B (2) and the gas reducing valve (11) are closed;
starting a vacuum pump (6) to pump, stopping the vacuum pump (6) after the pressure P2 in a vacuum chamber (9) is reduced to be below 5Pa and 5 minutes later, observing the change of the output signal U of the P2 and the protection sensor, adjusting a zero setting knob of the protection sensor when the P2 rises to be not more than 10Pa and the output signal U of the protection sensor does not change any more, enabling the output signal U to be in the range of 3-8 mV, observing for 5 minutes again, and when the fluctuation of the output signal U is less than 1 mV/minute, enabling the tightness of the testing device to meet the requirement and enabling the zero point adjustment of the sensor to meet the requirement;
thirdly, establishing the relation between the output signal U and the gas flow velocity v
When testing the effect of positive gas flow, opening valve A (1), valve B (2) and valve E (5), and closing valve C (3) and valve D (4);
when the effect of reverse gas flow is tested, the valve C (3), the valve D (4) and the valve E (5) are opened, and the valve A (1) and the valve B (2) are closed;
opening a gas reducing valve (11), filling simulated gas into a vacuum metering tank (10), recording pressure values P1 and P2, observing the change of an output signal U of the protection sensor under the action of forward gas flow, and after a period of time t; calculating the flow velocity v through pressure values P1 and P2 recorded by a computer and signal change time t, and selecting the maximum value of an output signal U of a protection sensor;
the pressure of gas entering a vacuum metering tank (10) is changed into different values by adjusting a gas pressure reducing valve (11), pressure values P1 and P2 and signal change time t are respectively recorded, the flow speed v is calculated, and the maximum value of an output signal U of a protection sensor is respectively selected; and respectively establishing the corresponding relation between the flow velocity v of the forward gas flow and the flow velocity v of the reverse gas flow and the maximum value of the output signal U of the protection sensor.
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| CN116148739A (en) * | 2022-08-29 | 2023-05-23 | 中国电力科学研究院有限公司 | Method for detecting overall performance of power transformer monitoring device |
| CN119915436B (en) * | 2024-12-20 | 2025-09-23 | 中国辐射防护研究院 | Uranium hexafluoride simulation leakage monitoring system |
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