CN218121417U - Water mist system test platform for oil-immersed transformer - Google Patents
Water mist system test platform for oil-immersed transformer Download PDFInfo
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- CN218121417U CN218121417U CN202221442341.0U CN202221442341U CN218121417U CN 218121417 U CN218121417 U CN 218121417U CN 202221442341 U CN202221442341 U CN 202221442341U CN 218121417 U CN218121417 U CN 218121417U
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Abstract
The utility model discloses a water mist system test platform for an oil immersed transformer, which comprises three ignition oil discs, a water mist system and a data acquisition body system; the three ignition oil discs are respectively placed at the top of the transformer, the sleeve of the transformer and the oil collection pit of the transformer; the data acquisition system comprises an upper computer, a gas acquisition module, a pressure flowmeter and a plurality of thermocouples; and the gas collection module, the pressure flowmeter and the thermocouple are respectively connected with an upper computer. The test platform can obtain various parameters such as temperature change of various ignition points of various transformers after ignition, oxygen concentration change in a fire scene, fire extinguishing time using fine water mist and the like, thereby configuring a proper fine water mist system for various transformers.
Description
Technical Field
The utility model relates to a fire control technology field, in particular to a thin water smoke system test platform for oil-immersed transformer.
Background
The ignition reason of the oil-immersed transformer is complex. Considering the fire occurrence part and the fire development and spread situation, the fire modes of the transformer mainly include three modes: the fire disaster of the root of the insulating sleeve, the local fire disaster of the oil tank and the overall fire disaster of the oil tank at the initial stage.
The interlayer insulation of the transformer silicon steel sheet is damaged, so that the transformer iron core can generate local overheating, and the temperature can reach more than 800 ℃; and the high energy discharge of the transformer can cause the local temperature to be as high as 3000 ℃.
The top oil temperature of the oil-immersed transformer during normal operation generally does not exceed 80 ℃, but slight oil decomposition phenomenon can be generated when the temperature reaches 400 ℃ during fault, and if the temperature is kept for a long time, a large amount of gaseous combustible materials such as methane, ethane and propane and the like which are full of hydrocarbon can be decomposed; if the overheating temperature is higher than 400 ℃, the decomposition speed of the transformer oil is increased, and at the moment, unsaturated hydrocarbons such as ethylene, propylene and the like are mainly generated; when the temperature rises to 800 ℃ again, the decomposition phenomenon of the transformer oil is strongest; when the superheat temperature exceeds 800 ℃, the transformer oil is almost completely decomposed into hydrogen, methane and acetylene.
Therefore, combustible solid, combustible liquid and combustible gas can exist simultaneously in the combustion process of the transformer fire, and the transformer fire has four fire characteristics of A/B/C/E.
The water mist is considered to be a clean and efficient alternative means for the haloalkane series fire extinguishing agents due to the advantages of environmental friendliness, safety for protected objects and field personnel, rapidness in fire extinguishing, low water consumption, suitability for extinguishing various types of fires and the like. The water mist can protect protected objects in various modes such as fire extinguishing, fire suppression, fire control, temperature control, dust fall and the like, the temperature of the surface of the flame is reduced through evaporation and heat absorption, the flame is extinguished due to suffocation through diluting an oxidant, and the water mist has the advantages of blocking radiant heat and the like.
Because oil-immersed transformer voltage class and kind are various, and the specification size diverse, need obtain each kind of transformer temperature variation, the oxygen concentration change in the scene of a fire of each ignition point after catching fire and with each item parameter such as time of putting out a fire with thin water smoke through the experiment before installing thin water smoke system to better match the thin water smoke system that debugs and be fit for all kinds of transformers.
Therefore, a test platform is required to obtain the parameters.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a thin water smoke system test platform for oil-immersed transformer can obtain all kinds of transformers and catch fire after each ignition point's temperature variation, oxygen concentration change in the scene of a fire and with each item parameter such as time of putting out a fire of thin water smoke through this test platform to for all kinds of transformers configuration suitable thin water smoke system.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:
a water mist system test platform for an oil immersed transformer comprises three ignition oil discs, a water mist system and a data acquisition body system; the three ignition oil discs are respectively placed at the top of the transformer, the sleeve of the transformer and the oil collection pit of the transformer; the water mist system comprises a controller, a high-pressure water mist pump set, a water supply pipe network, an open valve box and a water mist spray head set; the high-pressure water mist pump set is controlled by the controller; the water supply pipe network is connected with the fine water spray nozzle group through the open valve box; the data acquisition system comprises an upper computer, a gas acquisition module, a pressure flowmeter and a plurality of thermocouples; the gas collection module, the pressure flowmeter and the thermocouple are respectively connected with an upper computer.
Further, a filter is arranged between the high-pressure water mist pump set and a water source.
Further, the fine water mist spray head group comprises a first layer of fine water mist spray head group, a second layer of fine water mist spray head group and a third layer of fine water mist spray head group; the first layer of fine water mist spray head group surrounds the transformer oil collecting pit; the second layer of fine water mist spray head group surrounds the transformer body; and the third layer of fine water mist spray nozzle group is arranged at the highest position of the oil conservator of the transformer.
Further, the gas collection module comprises a flue gas analysis host and a flue gas probe, and is used for analyzing the change of the oxygen concentration of the environment.
Further, the high-pressure water mist pump set comprises a nine-plunger pump and a pressure stabilizing pump.
Further, the pressure flowmeter is arranged at the outlet of the high-pressure water mist pump set to detect the water supply pressure and flow in the water supply network; the controller controls the pressure stabilizing pump according to the pressure data of the pressure flowmeter, so that the water pressure in the water supply pipe network is maintained within a preset range.
Further, the data acquisition system further comprises a camera system.
Further, the transformer to be tested and the test platform are arranged in the safety housing.
The test platform can be used for measuring various parameters such as temperature change of each ignition point after the test transformer is ignited, oxygen concentration change in a fire scene, fire extinguishing time using fine water mist and the like, and a suitable fine water mist system is configured for the transformer through data analysis and debugging.
Drawings
FIG. 1 is a schematic diagram of the connection of the water mist system of the present invention;
fig. 2 is a schematic view of the installation of the data acquisition system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to fig. 1 to 2.
The utility model discloses a thin water smoke system test platform for oil-immersed transformer, including three ignition food tray, thin water smoke system and data acquisition system.
The three ignition oil discs are respectively placed at the top of the transformer, the sleeve of the transformer and the oil collection pit of the transformer. Transformer oil and combustible oil are simultaneously contained in the three ignition oil discs, and the transformer oil can be heated and decomposed due to the combustion of the combustible oil, so that the combustible oil can be ignited to simulate the ignition of a transformer.
The water mist system comprises a controller, a high-pressure water mist pump set 1, a water supply pipe network 3, an open valve box 2 and a water mist spray head set.
The high-pressure water mist pump set 1 is a power source of a water mist system and is controlled by a controller. The high-pressure water mist pump set 1 comprises a nine-plunger pump and a pressure stabilizing pump. Nine-plunger pumps are used to feed a water tank or municipal water supply into the water supply network 3, and in one embodiment the nine-plunger pumps are set to a maximum working pressure of 16Mpa and a flow rate in the range of 100-920L/min. The pressure stabilizing pump is used for maintaining the water pressure in the water supply network 3 at 1.0-1.2Mpa. As preferred means, install the filter between the fine water smoke pump package of high pressure 1 of the utility model and water tank or municipal water supply pipe for filter the impurity in the water source.
One end of the water supply network 3 is connected with a pressure stabilizing pump in the high-pressure fine water mist pump set 1, and the other end is connected with the fine water mist nozzle set.
The water supply network 3 is connected with the fine water spray nozzle group through the open valve box 2. An electric valve is arranged in the open valve box 2 and used for controlling the fine water mist spray head group.
The fine water spray nozzle groups comprise a first layer of fine water spray nozzle group 4, a second layer of fine water spray nozzle group 5 and a third layer of fine water spray nozzle group 6.
When the oil-immersed transformer body bursts, the leakage flow of the transformer oil is too fast, so that the oil is not discharged sufficiently, and a large-area oil collection fire pit is formed. Therefore, the first layer of fine water mist spray nozzle groups 4 surround the transformer oil collecting pit and are used for extinguishing oil collecting pit fire.
The insulating sleeve on the transformer body is used as the most easily ignited part of the transformer, and when the transformer is burst and damaged, transformer oil in the transformer box body can leak along a fracture opening. Because the oil pressure in the transformer body is small and the diameter area of the root part of the insulating sleeve is larger, the pressurized injection of the transformer oil can not be formed generally, and the main characteristic is that the oil collection pit fire and the flowing fire are formed by the leakage flow of the top plane of the transformer. Therefore, the second layer of fine water mist nozzle groups 5 surround the transformer body and are used for extinguishing oil collection pit fire and flowing fire.
Due to the transient strong heating effect of short-circuit current caused by fire and the heating of the conservator by high temperature of the fire, transformer oil inside the transformer body and inside the conservator is decomposed, the oil/air pressure rises, and after the rated value is exceeded, an oil/air mixture is ejected under pressure to present a pressure oil mist or gas fire. Therefore, the third layer of fine mist spray nozzle group 6 is arranged at the oil conservator at the highest position of the transformer and is used for extinguishing gas fire or cooling pressure oil mist.
The data acquisition system comprises an upper computer, a gas acquisition module, a pressure flowmeter and a plurality of thermocouples. The gas collection module, the pressure flowmeter and the thermocouple are respectively connected with the upper computer.
The gas collection module comprises a smoke analysis host 7 and a smoke probe 8 and is used for collecting fire smoke so as to analyze the change of the ambient oxygen concentration in the test process.
A pressure flowmeter (not shown) is installed at the outlet of the high-pressure water mist pump group to detect the pressure and flow rate of the supplied water in the water supply network 3. The controller controls the pressure stabilizing pump according to the pressure data of the pressure flowmeter, so that the water pressure in the water supply network 3 is maintained at 1.0-1.2Mpa.
The thermocouple is used for measuring the temperature change condition of the fire field in the test process. In a preferred embodiment, the installation position is as shown in figure 2, and one or 2 thermocouples (T1-T2) are respectively installed at the horizontal center position of the oil spray of the transformer conservator and at positions 0.05m and 0.5m away from the nozzle outlet of the conservator; 4 (T3-T6) oil collecting pits are respectively arranged at the centers of four sides of each oil collecting pit, wherein the distance between the oil collecting pit and the oil level is 0.1m, and the distance between the oil collecting pit and the center of each side of each oil collecting pit is 0.3 m; 1 (T7) is arranged at the position 0.1m away from the oil surface at the center of an ignition oil disc at the sleeve, and 2 (T8-T9) are respectively arranged at the 1/3 and 2/3 height positions of the flowing fire position on the transformer body; the inner surface of the transformer body is provided with 6 pieces (T10-T15) for measuring the temperature change of the transformer body.
In a preferred embodiment, the data acquisition system further comprises a camera system for recording the development status of the fire and the extinguishing process of the water mist.
The utility model discloses a work flow does:
step one, a transformer to be tested and a test platform are arranged. The transformer to be tested and the test platform are arranged in a safety casing as shown in figure 2, and a spray head group, an ignition oil pan and sensors (including a thermocouple, a smoke probe, a pressure flowmeter and a camera) are arranged according to test requirements. The safety cover shell is an optimal technical means, and can also adopt an assembly structure and be assembled after the transformer and the test platform are arranged. The smoke probe may be mounted on an inner wall of the safety enclosure.
Injecting transformer oil into the ignition oil disc, and starting the data acquisition system and the camera system; and manually igniting the ignition oil disc and starting timing, wherein the ignition sequence is the ignition oil disc at the top of the transformer, the ignition oil disc at the sleeve of the transformer and the ignition oil disc at the oil collecting pit.
And step three, pre-burning for 30s, opening a water mist system to extinguish the fire, observing the fire extinguishing process and recording the fire extinguishing time.
And step four, after the fire is completely extinguished, closing the water mist system, the data acquisition system and the camera system in sequence.
Fifthly, the environment of the site to be tested is stable, the ignition oil disc is manually re-ignited, and the ignition sequence is the same as that in the second step;
and step six, repeating the step three.
Through the steps, various parameters such as temperature change of each ignition point after the test transformer is ignited, oxygen concentration change in a fire scene, fire extinguishing time using the fine water mist and the like can be obtained, and a proper fine water mist system can be configured for the transformer through data analysis and debugging, such as the number of spray heads, the positions of the spray heads, the power of a pump set and the like.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The present invention is not limited to the above description of the embodiments, and those skilled in the art should be able to make modifications and alterations without creative work on the basis of the present invention.
Claims (9)
1. The utility model provides a thin water smoke system test platform for oil-immersed transformer which characterized in that:
the device comprises three ignition oil discs, a water mist system and a data acquisition body system;
the three ignition oil discs are respectively placed at the top of the transformer, a transformer sleeve and an oil collecting pit of the transformer;
the water mist system comprises a controller, a high-pressure water mist pump set, a water supply pipe network, an open valve box and a water mist spray head set; the high-pressure water mist pump set is controlled by the controller; the water supply pipe network is connected with the fine water spray nozzle group through the open valve box;
the data acquisition system comprises an upper computer, a gas acquisition module, a pressure flowmeter and a plurality of thermocouples; the gas collection module, the pressure flowmeter and the thermocouple are respectively connected with an upper computer.
2. The water mist system test platform for the oil-immersed transformer according to claim 1, characterized in that:
and a filter is arranged between the high-pressure water mist pump set and a water source.
3. The water mist system test platform for the oil-immersed transformer according to claim 1, characterized in that:
the fine water mist spray head group comprises a first layer of fine water mist spray head group, a second layer of fine water mist spray head group and a third layer of fine water mist spray head group;
the first layer of fine water mist spray nozzle group surrounds the oil collecting pit of the transformer; the second layer of fine water mist spray head group surrounds the transformer body; and the third layer of fine water mist spray head group is arranged at the oil conservator at the highest position of the transformer.
4. The water mist system test platform for the oil-immersed transformer according to claim 1, wherein:
the gas collection module comprises a flue gas analysis host and a flue gas probe and is used for analyzing the change of the oxygen concentration of the environment.
5. The water mist system test platform for the oil-immersed transformer according to claim 1, characterized in that:
the high-pressure water mist pump set comprises a nine-plunger pump and a pressure stabilizing pump.
6. The water mist system test platform for the oil-immersed transformer according to claim 5, wherein:
the pressure flowmeter is arranged at the outlet of the high-pressure water mist pump set so as to detect the water supply pressure and flow in the water supply network; the controller controls the pressure stabilizing pump according to the pressure data of the pressure flowmeter, so that the water pressure in the water supply pipe network is maintained within a preset range.
7. The water mist system test platform for the oil-immersed transformer according to claim 1, characterized in that:
the thermocouple is used for measuring the temperature change of a fire field in the test process.
8. The water mist system test platform for the oil-immersed transformer according to claim 1, wherein:
the data acquisition system further comprises a camera system.
9. The water mist system test platform for the oil-immersed transformer according to claim 1, characterized in that:
the transformer to be tested and the test platform are arranged in the safety housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221442341.0U CN218121417U (en) | 2022-06-07 | 2022-06-07 | Water mist system test platform for oil-immersed transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221442341.0U CN218121417U (en) | 2022-06-07 | 2022-06-07 | Water mist system test platform for oil-immersed transformer |
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| Publication Number | Publication Date |
|---|---|
| CN218121417U true CN218121417U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221442341.0U Active CN218121417U (en) | 2022-06-07 | 2022-06-07 | Water mist system test platform for oil-immersed transformer |
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| CN (1) | CN218121417U (en) |
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- 2022-06-07 CN CN202221442341.0U patent/CN218121417U/en active Active
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