CN111948258A - Test device and test method for simulating fire burning of transformer bushing - Google Patents
Test device and test method for simulating fire burning of transformer bushing Download PDFInfo
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- CN111948258A CN111948258A CN202010675627.2A CN202010675627A CN111948258A CN 111948258 A CN111948258 A CN 111948258A CN 202010675627 A CN202010675627 A CN 202010675627A CN 111948258 A CN111948258 A CN 111948258A
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- 238000005422 blasting Methods 0.000 claims abstract description 12
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- 238000004880 explosion Methods 0.000 claims description 17
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
- G01J5/0018—Flames, plasma or welding
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
Abstract
The invention discloses a test device for simulating fire burning of a transformer bushing and a test method thereof, the test device comprises a test tank, the test tank is provided with a first thermocouple probe fixing port, a second thermocouple probe fixing port, a first pressure sensor probe fixing port, a second pressure sensor probe fixing port, an oil discharge port, a pressure relief port and a blasting port, a heater is arranged in the test tank, and the test device is provided with a computer, a control box, a data acquisition instrument, an infrared thermal imager and a high-definition camera and is used for data acquisition The development rule and the prevention and treatment have important significance.
Description
Technical Field
The invention relates to the technical field of engineering thermophysical tests, in particular to a test device for simulating fire combustion of a transformer bushing and a test method thereof.
Background
BLEVE is an english abbreviation of boiling liquid expansion vapor explosion (boiling liquid expansion vapor explosion), which is commonly seen in an oil storage test tank, the test tank is heated due to an accident, a large amount of high-temperature oil vapor is generated to cause the internal pressure of the test tank to rise, the wall surface of the test tank which is not soaked by liquid cannot be timely radiated to cause the rapid rise of the wall surface temperature, the strength of the wall surface material is reduced under a high-temperature condition to cause local failure, cracks appear on the surface of the test tank, the high-temperature high-pressure oil vapor is instantly released to cause the rapid reduction of the pressure in a container, the liquid in an original closed container is instantly in an overheat state, the liquid is explosively boiled to generate a large amount of vapor to impact cracks of the test tank, and if the cracks are rapidly expanded on the whole storage tank, the explosion form is the boiling liquid expansion vapor explosion;
at present, most of domestic and foreign test simulation researches are carried out on a boiler BLEVE, namely heated liquid is water, the researches on an oil test tank are very few, in recent years, BLEVE is generated when a sleeve of a large converter transformer is broken due to the fact that oil of an internal transformer is heated, the times of flowing fire and jet fire are increased, and the converter transformer fire disaster not only causes the interruption of power transmission but also causes a large amount of economic loss, so that the converter transformer fire disaster research is very important. Aiming at the situation, a large number of students carry out a small-scale oil pool transformer oil combustion test, the oil pool combustion test only researches the combustion characteristics of the transformer oil, and the research on the early-stage fire of the converter transformer, namely sleeve BLEVE, and the complex mechanism of flowing fire and jet fire cannot be realized, so that the evolution rule of the early-stage fire of the converter transformer can be systematically, comprehensively and deeply disclosed;
the converter transformer initial fire usually is caused by that high-energy electric arcs are instantly generated in the converter transformer due to the short circuit of a fault generating circuit inside the converter transformer, the oil temperature of the transformer inside the converter transformer is rapidly increased, high-temperature oil vapor is generated to cause the internal air pressure to be increased, the top of a sleeve is impacted to form cracks, finally, a broken sleeve is vertically upwards sprayed to form BLEVE, the high-temperature oil vapor evolves to spray fire under the action of a high-temperature environment, and flowing fire is formed on the wall surface of the broken sleeve. Therefore, the method has important significance for qualitatively and quantitatively analyzing the initial fire of the converter transformer by researching the occurrence and development rules of the initial fire of the converter transformer, clarifying the mechanism of sleeve damage instability caused by sleeve BLEVE and analyzing the combustion characteristics of sleeve flowing fire and jet fire. By using the arc pulse ignition technology, the initial fire condition of the converter transformer in the actual working condition can be truly simulated, the local change, the slight change and the change trend of transformer oil and oil vapor inside the sleeve can be known, and the BLEVE, the flowing fire and the jet fire properties of the transformer oil of the sleeve under different working conditions can be mastered;
the experimental device for simulating the fire burning of the transformer bushing can be used for researching BLEVE (leakage of residual heat from transformer oil) generated by heating transformer oil in the arc pulse ignition bushing, flowing fire and jet fire characteristics, analyzing the micro mechanism and the change process of BLEVE generated by the bushing and flowing fire and jet fire according to temperature and pressure data, explaining the phenomena of macro BLEVE, flowing fire and jet fire, revealing the evolution law of BLEVE generated by heating transformer oil in the arc pulse ignition bushing and flowing fire and jet fire, and providing reliable scientific basis for the micro mechanism research and macro engineering research and development of initial fire of the converter transformer;
relevant to the present application are:
1. the experiment system for inducing the cold BLEVE of the high-pressure storage tank by leakage disclosed by the patent CN201821489687.X is characterized by comprising a vacuumizing and water supplementing system, an experiment main body device, a rupture disk, a monitoring system, a control system and a data acquisition system, wherein the experiment main body device comprises a storage tank and a support arranged below the storage tank, and the vacuumizing and water supplementing system, the monitoring system and the rupture disk are respectively connected with the storage tank; the data acquisition system is positioned outside the storage tank and is connected with the monitoring system through a lead, and the vacuumizing and water supplementing system is connected with the control system through a lead;
2. the explosion testing device for the BLEVE rule of the high-pressure storage tank induced by fire disclosed by the Chinese patent CN201821491259.0 is characterized by comprising a water supplementing and vacuum system, an experiment main device, a heating system, a control system, a data acquisition and processing system and a computer, wherein the water supplementing and vacuum system and the heating system are connected with the control system through leads;
although experimental systems related to the two patents study the evolution law of the BLEVE under the heating conditions of the water storage test tank under the heating radiation and the electric heating conditions, the method cannot test the converter transformer bushing BLEVE under the arc pulse ignition condition. Therefore, a test device for simulating fire burning of the transformer bushing needs to be designed.
Disclosure of Invention
In order to research BLEVE, flowing fire and jet fire of a small-scale converter transformer sleeve under the condition of arc pulse ignition, the invention designs a test device for simulating fire burning of the transformer sleeve to research the initial-stage evolution law of the converter transformer fire.
The specific technical scheme is as follows:
a test device for simulating fire burning of a transformer bushing is characterized by comprising a test tank, wherein a first thermocouple probe fixing port, a second thermocouple probe fixing port, a first pressure sensor probe fixing port, a second pressure sensor probe fixing port, an oil discharge port, a pressure relief port and a blasting port are arranged on the test tank, and a heater is arranged in the test tank;
the first thermocouple probe fixing port, the first pressure sensor probe fixing port, the pressure relief port and the blasting port are arranged at the top of the test tank, communicated with the interior of the test tank and distributed in four corners, the second thermocouple probe fixing port and the second pressure sensor probe fixing port are arranged in the middle of the side wall of the test tank, communicated with the interior of the test tank and symmetrically arranged, and the oil relief port is positioned at the bottom of the test tank and communicated with the inner wall of the test tank;
the first thermocouple probe fixing port and the second thermocouple probe fixing port are both in threaded sealing connection with a first mounting bolt, a thermocouple probe is mounted at the end part of the first mounting bolt, and the thermocouple probe extends into the test tank through the first mounting bolt;
the first pressure sensor probe fixing port and the second pressure sensor probe fixing port are both in threaded sealing connection with a second mounting bolt, a pressure sensor probe is mounted at the end of the second mounting bolt, and the pressure sensor probe extends into the test tank through the second mounting bolt;
the utility model discloses a rupture disk explosion test device, including explosion piece, pressure release mouth, discharge port department, solenoid valve, explosion piece, fixed plate, end connection of fixed plate, arc pulse positive pole and arc pulse negative pole and explosion piece electric connection.
The test device for simulating the fire burning of the transformer bushing further comprises a computer, a control box, a data acquisition instrument, a thermal infrared imager and a high-definition camera, the control box is electrically connected with the arc pulse anode and the arc pulse cathode through a first lead wire, controls the arc pulse anode and the arc pulse cathode to emit pulse arcs, is electrically connected with the electromagnetic valve through a second lead wire, controls the electromagnetic valve to be opened and closed, is electrically connected with the heater through a third lead wire, controls the heater to be opened and closed, the thermocouple probe and the pressure sensor probe are respectively connected with the data acquisition instrument through a first signal transmission line and a second signal transmission line, the thermal infrared imager is arranged on one side of the test tank, and is connected with the computer through a third signal transmission line, and the high-definition camera is installed on one side of the test tank and is connected with the computer through a fourth signal transmission line.
According to the test device for simulating fire burning of the transformer bushing, the wire-passing hole is formed in the middle shaft direction of the first mounting bolt and used for the thermocouple probe to pass through wires.
According to the test device for simulating fire burning of the transformer bushing, the wire-passing hole is formed in the middle shaft direction of the second mounting bolt and used for the probe of the pressure sensor to pass through.
The test device for simulating fire burning of the transformer bushing is characterized in that the test tank is in a hollow cylinder shape, the diameter of the test tank is 200mm, the height of the test tank is 500mm, and the wall thickness of the test tank is 20 mm.
The test device for simulating the fire burning of the transformer bushing is characterized in that the high-definition camera is erected on the front face of the test tank through a tripod, and the distance is 5 m.
The testing device for simulating the fire burning of the transformer bushing is characterized in that the thermal infrared imager is erected on the reverse side of the testing tank through a tripod, and the distance is 5 m.
The above test device for simulating fire burning of the transformer bushing is characterized in that the test tank is mounted on the base.
The above test device for simulating fire burning of the transformer bushing is characterized in that the base is supported by the bracket.
A test method of a test device for simulating fire burning of a transformer bushing is characterized by comprising the following steps:
the method comprises the following steps: placing the test tank in a test field, erecting a high-definition camera by using a tripod at a position 5m in front of the test tank, starting the high-definition camera, and connecting the high-definition camera with a computer through a fourth signal transmission line for acquiring test video image data; erecting an infrared thermal imager by a tripod at a position 5m behind the test tank, starting the infrared thermal imager, and connecting the infrared thermal imager with a computer through a third signal transmission line for acquiring thermal imaging image data; opening a computer, debugging image signals, and completing the opening and debugging of a high-definition camera and a thermal infrared imager;
step two: respectively installing a thermocouple probe and a pressure sensor probe on a first installation bolt and a second installation bolt, sealing and fixing the first installation bolt provided with the thermocouple probe at a first thermocouple probe fixing port and a second thermocouple probe fixing port, and sealing and fixing the second installation bolt provided with the pressure sensor probe at the first pressure sensor probe fixing port and the second pressure sensor probe fixing port; meanwhile, the thermocouple probe and the pressure sensor probe are connected with the data acquisition instrument through the first signal transmission line and the second signal transmission line, the data acquisition instrument is started, the data transmission signal is debugged, and the starting and debugging of the thermocouple probe and the pressure sensor probe are completed;
step three: the heater is arranged at the bottom in the test tank and is connected with the control box through a third lead; fixing an arc pulse anode and an arc pulse cathode on the surface of an arc pulse fixing plate, wherein the arc pulse anode and the arc pulse cathode are connected with a control box through a first lead;
step four: the rupture disk is installed and fixed at the position of the blasting opening, and the electromagnetic valve is connected with the control box body through a second lead;
step five: weighing 25# brand new transformer oil for testing by using a high-precision electronic balance, and recording mass data; then, injecting the weighed transformer oil into the test tank through the explosion opening; installing a pressure relief valve at the pressure relief opening, closing the pressure relief valve, and installing a rupture disk on the rupture opening; the method comprises the following steps of turning on a power supply, starting an infrared thermal imager, a high-definition camera, a thermocouple probe and a pressure sensor probe, starting a heater through a control box, heating transformer oil in a test tank, starting arc pulse through the control box when the transformer oil in the test tank is heated to a preset temperature, igniting transformer oil in the test tank, and starting an electromagnetic valve through the control box to open an oil discharge hole;
step six: after the flame is completely extinguished and the pressure and temperature data tend to the environment, the power supply of the equipment is turned off, the test data is backed up, the data is analyzed, whether the data is abnormal or not is observed, and whether the high-definition camera, the thermal infrared imager, the thermocouple probe and the pressure sensor probe operate normally or not is observed;
step seven: and D, when the test tank is cooled to the initial temperature and is restored to the initial state, no test liquid exists in the test tank, and the pressure temperature and the environment are not different, changing the test working condition, adding transformer oil, replacing the rupture disk and preparing for the next test according to the fifth step.
The invention has the beneficial effects that:
the invention discloses a test device for simulating fire burning of a transformer bushing and a test method thereof, the test device comprises a test tank, the test tank is provided with a first thermocouple probe fixing port, a second thermocouple probe fixing port, a first pressure sensor probe fixing port, a second pressure sensor probe fixing port, an oil discharge port, a pressure discharge port and a blasting port, a heater is arranged in the test tank, and the test device is provided with a corresponding thermocouple probe, a pressure sensor probe, an electromagnetic valve, a pressure release valve and a blasting piece, and further comprises a computer, a control box, a data acquisition instrument, an infrared thermal imager and a high-definition camera for data acquisition. The method overcomes the defect that the transformer oil needs to be put into an oil pool for burning to roughly simulate in the traditional test, realizes the real-time reproduction and recording of the converter transformer sleeve BLEVE and the flowing fire and the jet fire under the real situation, and has important significance for researching the real-time change, the development rule and the prevention and the treatment of the converter transformer sleeve BLEVE and the flowing fire and the jet fire.
Drawings
Fig. 1 is a schematic diagram of the present invention.
FIG. 2 is a front view of the test canister.
Fig. 3 is a left side view of the test pot.
FIG. 4 is a top view of the test pot.
Fig. 5 is a schematic view of a first mounting bolt.
FIG. 6 is a schematic view of a second mounting bolt.
Detailed Description
In order to make the technical solution of the present invention clearer and clearer, the present invention is further described below with reference to embodiments, and any solution obtained by substituting technical features of the technical solution of the present invention with equivalents and performing conventional reasoning falls within the scope of the present invention.
Example one
The test device for simulating the fire burning of the transformer bushing is characterized by comprising a test tank 1, wherein the test tank 1 is provided with a first thermocouple probe fixing port 2, a second thermocouple probe fixing port 3, a first pressure sensor probe fixing port 4, a second pressure sensor probe fixing port 5, an oil discharge port 6, a pressure relief port 7 and a blasting port 8, and a heater 9 is arranged in the test tank 1;
the first thermocouple probe fixing port 2, the first pressure sensor probe fixing port 4, the pressure relief port 7 and the blasting port 8 are arranged at the top of the test tank 1, communicated with the interior of the test tank 1 and distributed in four corners, the second thermocouple probe fixing port 3 and the second pressure sensor probe fixing port 5 are arranged in the middle of the side wall of the test tank 1, communicated with the interior of the test tank 1 and symmetrically arranged, and the oil discharge ports 6 are positioned at the bottom of the test tank 1 and communicated with the inner wall of the test tank 1;
the first thermocouple probe fixing port 2 and the second thermocouple probe fixing port 3 are both in threaded sealing connection with a first mounting bolt 10, a thermocouple probe 11 is mounted at the end part of the first mounting bolt 10, and the thermocouple probe 11 extends into the test tank 1 through the first mounting bolt 10;
the first pressure sensor probe fixing port 4 and the second pressure sensor probe fixing port 5 are both in threaded sealing connection with a second mounting bolt 12, the end part of the second mounting bolt 12 is provided with a pressure sensor probe 13, and the pressure sensor probe 13 extends into the test tank 1 through the second mounting bolt 12;
The test device for simulating fire burning of the transformer bushing further comprises a computer 20, a control box 21, a data collector 22, a thermal infrared imager 23 and a high-definition camera 24, wherein the control box 21 is electrically connected with an arc pulse anode 18 and an arc pulse cathode 19 through a first lead 25 to control the arc pulse anode 18 and the arc pulse cathode 19 to emit pulse arcs, the control box 21 is electrically connected with an electromagnetic valve 15 through a second lead 26 to control the electromagnetic valve 15 to be opened and closed, the control box 21 is electrically connected with a heater 9 through a third lead 27 to control the heater 9 to be opened and closed, the thermocouple probe 11 and the pressure sensor probe 13 are respectively connected with the data collector 22 through a first signal transmission line 28 and a second signal transmission line 29, the thermal infrared imager 23 is installed on one side of the test tank 1 and connected with the computer 20 through a third signal transmission line 30, the high-definition camera 24 is arranged on one side of the test tank 1 and is connected with the computer 20 through a fourth signal transmission line 31;
the test tank 1 is in a hollow cylindrical shape, the diameter of the test tank 1 is 200mm, the height of the test tank is 500mm, and the wall thickness of the test tank 1 is 20 mm;
the high-definition camera 24 is erected on the front side of the test tank 1 through a tripod at a distance of 5m, the thermal infrared imager 23 is erected on the back side of the test tank 1 through a tripod at a distance of 5m, the test tank 1 is mounted on a base 33, and the base 33 is supported by a support 34;
the testing device of the embodiment is designed for researching phenomena of small-scale converter transformer sleeve BLEVE, flowing fire and jet fire under the condition of arc pulse ignition, can effectively simulate the fire burning condition of the transformer sleeve, solves the problem that the burning explosion of the converter transformer sleeve cannot be really and effectively simulated in a real test, overcomes the defect that transformer oil needs to be put into an oil sump to burn roughly in a traditional test, realizes real-time reproduction and recording of the converter transformer sleeve BLEVE, the flowing fire and the jet fire under the real situation, and has important significance for researching real-time changes, development rules and prevention and control of the converter transformer sleeve BLEVE, the flowing fire and the jet fire.
Example two
The test method of the test device for simulating the fire burning of the transformer bushing is characterized by comprising the following steps of:
the method comprises the following steps: placing the test tank in a test field, erecting a high-definition camera by using a tripod at a position 5m in front of the test tank, starting the high-definition camera, and connecting the high-definition camera with a computer through a fourth signal transmission line for acquiring test video image data; erecting an infrared thermal imager by a tripod at a position 5m behind the test tank, starting the infrared thermal imager, and connecting the infrared thermal imager with a computer through a third signal transmission line for acquiring thermal imaging image data; opening a computer, debugging image signals, and completing the opening and debugging of a high-definition camera and a thermal infrared imager;
step two: respectively installing a thermocouple probe and a pressure sensor probe on a first installation bolt and a second installation bolt, sealing and fixing the first installation bolt provided with the thermocouple probe at a first thermocouple probe fixing port and a second thermocouple probe fixing port, and sealing and fixing the second installation bolt provided with the pressure sensor probe at the first pressure sensor probe fixing port and the second pressure sensor probe fixing port; meanwhile, the thermocouple probe and the pressure sensor probe are connected with the data acquisition instrument through the first signal transmission line and the second signal transmission line, the data acquisition instrument is started, the data transmission signal is debugged, and the starting and debugging of the thermocouple probe and the pressure sensor probe are completed;
step three: the heater is arranged at the bottom in the test tank and is connected with the control box through a third lead; fixing an arc pulse anode and an arc pulse cathode on the surface of an arc pulse fixing plate, wherein the arc pulse anode and the arc pulse cathode are connected with a control box through a first lead;
step four: the rupture disk is installed and fixed at the position of the blasting opening, and the electromagnetic valve is connected with the control box body through a second lead;
step five: weighing 25# brand new transformer oil for testing by using a high-precision electronic balance, and recording mass data; then, injecting the weighed transformer oil into the test tank through the explosion opening; installing a pressure relief valve at the pressure relief opening, closing the pressure relief valve, and installing a rupture disk on the rupture opening; the method comprises the following steps of turning on a power supply, starting an infrared thermal imager, a high-definition camera, a thermocouple probe and a pressure sensor probe, starting a heater through a control box, heating transformer oil in a test tank, starting arc pulse through the control box when the transformer oil in the test tank is heated to a preset temperature, igniting transformer oil in the test tank, and starting an electromagnetic valve through the control box to open an oil discharge hole;
step six: after the flame is completely extinguished and the pressure and temperature data tend to the environment, the power supply of the equipment is turned off, the test data is backed up, the data is analyzed, whether the data is abnormal or not is observed, and whether the high-definition camera, the thermal infrared imager, the thermocouple probe and the pressure sensor probe operate normally or not is observed;
step seven: when the test tank is cooled to the initial temperature and returns to the initial state, no test liquid exists in the test tank, and the pressure temperature and the environment are not different, changing the test working condition, adding transformer oil, replacing the rupture disk and preparing the next test according to the fifth step;
the test method of the embodiment is designed based on the test device of the first embodiment, and through the method of the embodiment, the simulation of the fire burning condition of the transformer bushing can be effectively realized, and then relevant phenomenon data are collected, so that data support is provided for researching the real-time change and development rule of the converter transformer bushing BLEVE and the flowing fire and the jet fire, and effective and reliable data support is provided for the research of the prevention method.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A test device for simulating fire burning of a transformer bushing is characterized by comprising a test tank, wherein a first thermocouple probe fixing port, a second thermocouple probe fixing port, a first pressure sensor probe fixing port, a second pressure sensor probe fixing port, an oil discharge port, a pressure relief port and a blasting port are arranged on the test tank, and a heater is arranged in the test tank;
the first thermocouple probe fixing port, the first pressure sensor probe fixing port, the pressure relief port and the blasting port are arranged at the top of the test tank, communicated with the interior of the test tank and distributed in four corners, the second thermocouple probe fixing port and the second pressure sensor probe fixing port are arranged in the middle of the side wall of the test tank, communicated with the interior of the test tank and symmetrically arranged, and the oil relief port is positioned at the bottom of the test tank and communicated with the inner wall of the test tank;
the first thermocouple probe fixing port and the second thermocouple probe fixing port are both in threaded sealing connection with a first mounting bolt, a thermocouple probe is mounted at the end part of the first mounting bolt, and the thermocouple probe extends into the test tank through the first mounting bolt;
the first pressure sensor probe fixing port and the second pressure sensor probe fixing port are both in threaded sealing connection with a second mounting bolt, a pressure sensor probe is mounted at the end of the second mounting bolt, and the pressure sensor probe extends into the test tank through the second mounting bolt;
the utility model discloses a rupture disk explosion test device, including explosion piece, pressure release mouth, discharge port department, solenoid valve, explosion piece, fixed plate, end connection of fixed plate, arc pulse positive pole and arc pulse negative pole and explosion piece electric connection.
2. The testing device for simulating fire burning of the transformer bushing according to claim 1, further comprising a computer, a control box, a data acquisition device, a thermal infrared imager and a high definition camera, wherein the control box is electrically connected with the arc pulse anode and the arc pulse cathode through a first lead wire, the arc pulse anode and the arc pulse cathode are controlled to emit pulse arcs, the control box is electrically connected with the electromagnetic valve through a second lead wire, the electromagnetic valve is controlled to be opened and closed, the control box is electrically connected with the heater through a third lead wire, the heater switch is controlled, the thermocouple probe and the pressure sensor probe are respectively connected with the data acquisition device through a first signal transmission line and a second signal transmission line, the thermal infrared imager is installed at one side of the testing tank and is connected with the computer through a third signal transmission line, the high definition camera is installed at one side of the testing tank, and is connected with the computer through a fourth signal transmission line.
3. The test device for simulating the fire burning of the transformer bushing according to claim 2, wherein a wire hole is formed in the first mounting bolt in the direction of the central axis for a thermocouple probe to run.
4. The test device for simulating the fire burning of the transformer bushing according to claim 3, wherein a wire hole is formed in the second mounting bolt in the direction of the central axis for routing a pressure sensor probe.
5. The test device for simulating fire burning of the transformer bushing as claimed in claim 2, wherein the test tank has a hollow cylindrical shape with a diameter of 200mm and a height of 500mm, and a wall thickness of 20 mm.
6. The test device for simulating fire burning of the transformer bushing as claimed in claim 5, wherein the high definition camera is erected on the front face of the test tank by a tripod at a distance of 5 m.
7. The test device for simulating fire burning in the transformer bushing as claimed in claim 6, wherein the thermal infrared imager is mounted on the reverse side of the test tank by a tripod at a distance of 5 m.
8. The apparatus of claim 2, wherein the test tank is mounted on the base.
9. The apparatus of claim 8, wherein the base is supported by a bracket.
10. A test method of a test device for simulating fire burning of a transformer bushing is characterized by comprising the following steps:
the method comprises the following steps: placing the test tank in a test field, erecting a high-definition camera by using a tripod at a position 5m in front of the test tank, starting the high-definition camera, and connecting the high-definition camera with a computer through a fourth signal transmission line for acquiring test video image data; erecting an infrared thermal imager by a tripod at a position 5m behind the test tank, starting the infrared thermal imager, and connecting the infrared thermal imager with a computer through a third signal transmission line for acquiring thermal imaging image data; opening a computer, debugging image signals, and completing the opening and debugging of a high-definition camera and a thermal infrared imager;
step two: respectively installing a thermocouple probe and a pressure sensor probe on a first installation bolt and a second installation bolt, sealing and fixing the first installation bolt provided with the thermocouple probe at a first thermocouple probe fixing port and a second thermocouple probe fixing port, and sealing and fixing the second installation bolt provided with the pressure sensor probe at the first pressure sensor probe fixing port and the second pressure sensor probe fixing port; meanwhile, the thermocouple probe and the pressure sensor probe are connected with the data acquisition instrument through the first signal transmission line and the second signal transmission line, the data acquisition instrument is started, the data transmission signal is debugged, and the starting and debugging of the thermocouple probe and the pressure sensor probe are completed;
step three: the heater is arranged at the bottom in the test tank and is connected with the control box through a third lead; fixing an arc pulse anode and an arc pulse cathode on the surface of an arc pulse fixing plate, wherein the arc pulse anode and the arc pulse cathode are connected with a control box through a first lead;
step four: the rupture disk is installed and fixed at the position of the blasting opening, and the electromagnetic valve is connected with the control box body through a second lead;
step five: weighing 25# brand new transformer oil for testing by using a high-precision electronic balance, and recording mass data; then, injecting the weighed transformer oil into the test tank through the explosion opening; installing a pressure relief valve at the pressure relief opening, closing the pressure relief valve, and installing a rupture disk on the rupture opening; the method comprises the following steps of turning on a power supply, starting an infrared thermal imager, a high-definition camera, a thermocouple probe and a pressure sensor probe, starting a heater through a control box, heating transformer oil in a test tank, starting arc pulse through the control box when the transformer oil in the test tank is heated to a preset temperature, igniting transformer oil in the test tank, and starting an electromagnetic valve through the control box to open an oil discharge hole;
step six: after the flame is completely extinguished and the pressure and temperature data tend to the environment, the power supply of the equipment is turned off, the test data is backed up, the data is analyzed, whether the data is abnormal or not is observed, and whether the high-definition camera, the thermal infrared imager, the thermocouple probe and the pressure sensor probe operate normally or not is observed;
step seven: and D, when the test tank is cooled to the initial temperature and is restored to the initial state, no test liquid exists in the test tank, and the pressure temperature and the environment are not different, changing the test working condition, adding transformer oil, replacing the rupture disk and preparing for the next test according to the fifth step.
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