CN112198272A - Fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil filling equipment - Google Patents
Fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil filling equipment Download PDFInfo
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- CN112198272A CN112198272A CN202011184116.7A CN202011184116A CN112198272A CN 112198272 A CN112198272 A CN 112198272A CN 202011184116 A CN202011184116 A CN 202011184116A CN 112198272 A CN112198272 A CN 112198272A
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- G—PHYSICS
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Abstract
The invention relates to a fire-resistant test experiment platform for cable trench sealing measures near oil-filled equipment of a transformer substation, which comprises an oil storage tank, an oil pump and an oil delivery pipe, wherein a simulated flowing fire generation experiment part comprises a pre-oil pan and a flowing fire oil groove, and a fire-resistant experiment part comprises a bottom oil pan, a groove wall oil groove, a simulated groove wall, a test material splicing cover plate, a real-time monitoring system arranged around the platform and a data measurement system arranged in the platform. Adopt the mode setting that simulation trench wall and trench wall oil groove agree with mutually, under the structural aspect of guaranteeing furthest simulation actual conditions cable pit, can convenient and fast change experimental materials concatenation apron simultaneously. The oil inlet amount of the pre-combustion oil disc can be controlled through the oil pump, so that the fire intensity is changed. The invention can realize the simulation test of the fire resistance of the cable trench sealing measure near the oil filling equipment of the transformer substation, can research the influence on the sealing measure under different cover plate materials and different fire scenes, and has strong flexibility and applicability.
Description
Technical Field
The invention relates to the technical field of fire safety, in particular to a fire-resistant test experiment platform for cable trench sealing measures near oil filling equipment of a transformer substation.
Background
With the continuous development of modern society, the power supply pressure of cities is gradually increased, the number and the scale of substations are gradually enlarged, the available ground area is more and more tense with the increase of urban population, and the traffic pressure is gradually increased, so that most of large cities adopt an underground cable laying power transmission mode. Compared with the power transmission cable erected on the ground, the underground cable has the advantages of small battlefield area, external interference resistance and reliable power transmission. According to the statistical data of the current large-scale fire accidents in China, about 80% of the fire cases are electrically triggered, more than 50% of the fire cases are cable fires, the electrical fires become the first disasters of various large-scale fires, and once the fires happen, the serious economic loss and casualties are caused.
The cable trench cover plate of the transformer substation is mostly laid in a splicing mode and used for separating a cable in a trench from the ground of the transformer substation and bearing road surface pressure. Usually, the cover plate is used for seat patrol and access, but the cable is difficult to repair, and sewage is easy to accumulate after long-term use. Due to the influence of the construction process, gaps exist among the cover plates, and the cover plates do not have the capability of preventing water, oil and other liquids from permeating. When oil-filled equipment such as a transformer is in fire, internal insulating oil leaks, high-temperature hot oil fire flows into a nearby cable trench through a gap of the cover plate and may flow into the trench, so that the cable is ignited, and fire spreading and accident expansion are caused. In order to improve the fire safety level of the cable trench of the transformer substation, sealing measures such as a clamping groove type cable trench cover plate, cement mortar plastering, glass fiber fireproof cloth paving and the like are adopted, but at present, no unified standard exists for judging the advantages and disadvantages of the sealing measures. The existing evaluation system can only demonstrate the fire resistance of a sealing measure from a theoretical level, cannot truly simulate the actual fire situation of a cable duct of a transformer substation, and cannot provide experimental basis for improving the fire safety level of the transformer substation.
The research on the fire-resistant experiment of cable trench sealing measures under the actual condition is the most direct research means, but the experimental scale is large when the research is carried out on the transformer substation site, the operation is difficult, the cost is high, and the experimental parameters are difficult to change, a large amount of experimental data cannot be obtained, on the contrary, the difficulty can be solved by building an experimental platform, and a large amount of data can be obtained by changing various experimental parameters, so that the fire occurrence regularity on the sealing measures can be mastered. However, at present, no mature available experiment platform is available for carrying out experiments conveniently, and the fire scene content needing to be carried out is more.
A simulated sagging fire occurs. The most common fire hazard in the vicinity of transformer substation oil filling equipment is easy to generate flowing fire, and the simulation of the generation and the flowing of the flowing fire is an important experimental parameter.
The spread behavior of a flowing fire. Under actual transformer substation's cable pit environment, height, angle etc. that the apron laid all can have certain difference, and the conflagration under the conflagration scene spreads the action and also can have very big difference.
Fire resistance testing of different closures. The sealing modes of cable ducts adopted by all transformer substations are possibly different, the used cover plate materials are different, and the change of the splicing mode and the laying mode of the cover plate is also an important experimental variable.
Disclosure of Invention
In order to solve the problem that an equipment platform for reliably and conveniently carrying out the fire resistance test of the cable trench sealing measure is lacked at present, an experiment platform for testing the fire resistance of the cable trench sealing measure near the oil filling equipment of the transformer substation is provided.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a fire-resistant test experiment platform for cable trench sealing measures near oil-filled equipment of a transformer substation comprises a stand column, an oil pan, an oil pump, an oil tank, an oil delivery pipe, a pre-burning oil pan, a flowing fire oil groove, a data measurement system, a real-time monitoring system, a simulation trench wall, a trench wall oil groove and an experiment cover plate; wherein:
the four upright posts are independently arranged below the oil groove of the trench wall and the pre-oil disc and are distributed at four corners;
the oil pan is arranged at the bottom of the upright post below the oil groove of the trench wall;
the oil pump, the oil tank and the oil delivery pipe jointly form an oil delivery system of the pre-oil burning disc, and a connection port of the oil delivery pipe is arranged in the middle of the right side of the pre-oil burning disc;
the right side of the fire flowing oil groove is inserted into a clamping groove below an oil outlet of the pre-oil burning disc;
the left opening of the trickling fire oil tank is arranged above the oil groove of the trench wall, trickling fire occurs from the pre-burning oil pan, and after the liquid level is higher than the oil outlet of the pre-burning oil pan, the trickling fire oil tank gradually stretches to the oil groove of the trench wall, and a combustion surface is formed on the experimental cover plate.
The data measurement system comprises a temperature measurement system and a thermal radiation measurement system;
the real-time detection system comprises a digital camera recording system and a combustion indicating system.
The simulated trench wall is placed in the trench wall oil groove.
The liquid level in the control precombustion oil disc is always higher than the oil outlet by adjusting the flow of the oil pump, so that the trickling fire continuously spreads to the experimental cover plate on the oil groove of the trench wall through the trickling fire oil groove, and the combustion state of the trickling fire on the experimental cover plate is kept.
The simulation ditch wall is "return" font annular shape, and the internal dimension is the same with the inboard oil groove inner wall of ditch wall oil groove, therefore just encircles around the oil groove inner wall when simulation ditch wall is placed in the ditch wall oil groove.
The inboard oil groove inner wall of ditch wall oil groove is slightly lower than the oil groove outer wall in the outside, and is highly the same with the simulation ditch wall of putting into, makes the experiment apron can stably arrange oil groove inner wall and simulation ditch wall top in to be convenient for change.
The upright column is a hydraulic automatic lifting column and has a lifting function. Consists of a sleeve and a lifting rod; the cross section of the upright post is circular, and a perforated internal thread and a matched threaded rod are arranged on the sleeve; the 8 lifting rods are respectively fixed on the lower surfaces of the oil groove of the groove wall and the pre-burning oil disc.
Wherein, precombustion food tray left side oil-out below is provided with the draw-in groove, and trickling fire oil groove right side one end is placed in the draw-in groove, can make precombustion food tray and ditch wall oil groove produce the difference in height through the adjustment stand to make the slope of trickling fire oil groove produce certain angle, change experimental parameters.
Wherein, food tray, ditch wall oil groove, trickling fire oil groove, draw-in groove, precombustion food tray are stainless steel material.
Wherein, the simulation trench wall is made of concrete material.
The oil tank outer wall outside the ditch wall oil tank is put to the left side one end of the flowing fire oil tank, and the flowing fire oil tank is not fixed, so that the position of the oil tray can be moved in the direction of the central line of the flowing fire oil tank, the position of the left side one end of the flowing fire oil tank on the experimental cover plate is changed, and experimental parameters are changed.
The temperature measuring system in the data measuring system comprises thermocouples close to the back fire surface of the experimental cover plate, thermocouples distributed below the liquid level of the longitudinal center line of the pre-oil burning disc and on the liquid level at equal intervals and data acquisition equipment; the thermal radiation measurement system includes a heat flow meter and a data acquisition device distributed directly in front of the gutter wall oil sump and pre-oil pan.
The digital camera recording system in the real-time monitoring system comprises a camera arranged right in front of the experiment platform, a left upper camera, a rear upper camera and a cover plate bottom camera, and is used for observing the actual conditions of all the positions of the experiment platform in the experiment process; the combustion indicating system comprises two testing cotton felts arranged on the back fire surface of the experimental cover plate and is used for judging whether the back fire surface achieves a flammable environment in the experimental process.
The combustible liquid which can be supplied to the experimental platform by the oil storage tank comprises common oil such as insulating oil in transformer substation oil filling equipment.
Wherein, oil groove outer wall bottom sets up the oil-out stop valve, can be used to the liquid of hoarding in the trench wall oil groove after the single experiment is accomplished and discharge to the food tray in, judge concrete burning condition and help the smooth expansion of experiment next time.
The beneficial effect produced by adopting the above technical scheme is that: the invention discloses a cable trench sealing measure fire resistance test experiment platform near transformer substation oil filling equipment, which fills a platform equipment blank of a cable trench sealing measure fire resistance test experiment, can simulate actual conditions under various fire scenes, provides a large amount of reliable experiment data, and is specifically embodied in that:
(1) the experiment apron material is changed swiftly conveniently. In the material experimental area that catches fire of ditch wall oil groove, the high parallel and level of simulation ditch wall and oil groove inner wall is less than the oil groove outer wall, makes the experiment apron put into simulation ditch wall top just, arranges trickling fire oil groove below in, and stable difficult slip is favorable to the experiment to go on steadily, also helps convenient and fast to change experiment apron material.
(2) The spread angle and speed of the flowing fire can be controlled. Trickling fire oil groove right side one end is placed in the draw-in groove that sets up in precombustion food tray left side oil-out below, can make through adjustment lift stand to produce the difference in height with the ditch wall oil groove in precombustion food tray to make the slope of trickling fire oil groove produce certain angle, study the behavior of spreading of trickling fire under the different angles, provide multiunit experimental data.
(3) Fire resistance tests can be performed on different areas of the enclosure. Through removing the left side experiment food tray, change the relative position of experiment apron and trickling fire oil groove left end to change the position that trickling fire arrived experiment apron, study experiment apron different positions trickling fire and stretch the action, and carry out fire resistance test.
(4) The experimental data is accurate and reliable. The experiment platform is provided with a perfect data measurement system and a real-time monitoring system. Can accurate analysis go out the temperature variation condition of different positions through arranging the thermocouple on experiment apron back of the body fire face and precombustion oil pan, can the analysis obtain the heat radiation intensity of experiment apron and two regions of precombustion oil pan through setting up at positive heat flow meter, combine the camera of distribution in each direction of experiment platform, can be when observing real-time fire spreading condition, the analysis summarizes the law that trickling fire spreads under the different experimental conditions and the concrete opportunity that the enclosure measure became invalid, provide reliable data support for optimizing cable pit enclosure measure's fire resistance.
(5) Experiments with different fuels can be performed. The oil storage tank can provide common oils such as insulating oil and the like for oil filling equipment of the transformer substation for the experiment platform through the oil pump.
Drawings
FIG. 1 is a schematic structural diagram of a front view of a cable trench sealing measure fire resistance test experiment platform near oil filling equipment of a transformer substation;
FIG. 2 is a schematic top view 2 of a fire resistance testing experimental platform for a cable trench closing measure near the transformer substation oil filling equipment shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a liftable upright column in an experimental platform for testing the fire resistance of a cable trench sealing measure near the transformer substation oil filling equipment shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a junction of a fire-dripping oil groove and a clamping groove below an oil outlet of a pre-oil pan in a cable trench sealing measure fire-resistant test experiment platform near oil-filled equipment of a transformer substation;
wherein, 1-upright post, 2-oil pan, 3-oil pump, 4-oil storage tank, 5-precombustion oil pan, 6-data measuring system, 7-flowing fire oil groove, 8-real-time monitoring system, 9-oil outlet stop valve, 10-oil pipeline, 11-ditch wall oil groove, 12-experimental cover plate, 13-oil groove inner wall, 14-oil groove outer wall, 15-preheating oil pan thermocouple, 16-backfire surface thermocouple, 17-testing cotton felt, 18-heat flow meter, 19-cover plate bottom camera, 20-left side upper camera, 21-rear side upper camera, 22-front camera, 23-ditch simulating wall, 24-sleeve, 25-perforated internal thread, 26-threaded rod, 27-lifting rod, 28-oil outlet, 29-card slot.
Detailed Description
The invention conception of the invention is as follows: the fire resistance test experiment platform comprises an oil inlet system, a pre-burning oil pan and a fire resistance test system, wherein the oil inlet system consists of an oil storage tank, an oil pump and an oil inlet pipe and is used for conveying oil into the pre-burning oil pan to simulate flowing fire; the fire flowing oil groove is inserted into the clamping groove below the oil outlet of the pre-burning oil disc and is used as a fire flowing spreading channel; the fire resistance testing area comprises an experimental cover plate, a simulation trench wall and a trench wall oil groove, wherein the simulation trench wall is nested outside the inner wall of the trench wall oil groove, the simulation trench wall and the simulation trench wall are flush and lower than the outer wall of the trench wall oil groove, so that the experimental cover plate is conveniently placed above the simulation trench wall, the left end of the trickling fire oil groove is placed on the experimental cover plate, and a certain combustion area can be formed on the experimental cover plate after the trickling fire passes through the experimental cover plate; the vertical columns are of lifting structures and are respectively distributed at four corners below the oil groove of the trench wall and below the pre-oil burning disc, the number of the vertical columns is 8, and the experimental parameter change of multi-angle flowing fire spreading can be realized by adjusting the height difference between the cover plate and the pre-oil burning disc in a lifting way; the data measurement system is arranged in and around the experiment platform and comprises a temperature measurement system and a thermal radiation measurement system, wherein the temperature measurement system in the data measurement system comprises a thermocouple close to the back fire surface of the experiment cover plate, thermocouples distributed below the liquid surface of the longitudinal center line of the pre-oil burning disc and on the liquid surface at equal intervals and data acquisition equipment; the thermal radiation measurement system includes a heat flow meter and a data acquisition device distributed directly in front of the gutter wall oil sump and pre-oil pan. (ii) a The real-time monitoring system is arranged in and around the experiment platform and comprises a digital camera recording system and a combustion indicating system. The digital camera recording system in the real-time monitoring system comprises a camera arranged right in front of the experiment platform, a left upper camera, a rear upper camera and a cover plate bottom camera, and is used for observing the actual conditions of all the positions of the experiment platform in the experiment process; the combustion indicating system comprises two testing cotton felts arranged on the back fire surface of the experimental cover plate and is used for judging whether the back fire surface achieves a flammable environment in the experimental process.
In addition, a test platform for testing the fire resistance of cable trench sealing measures near oil filling equipment of a transformer substation further comprises the following additional technical characteristics:
the liquid level in the control precombustion oil disc is always higher than the oil outlet by adjusting the flow of the oil pump, so that the trickling fire continuously spreads to the experimental cover plate on the oil groove of the trench wall through the trickling fire oil groove, and the combustion state of the trickling fire on the experimental cover plate is kept.
The simulation ditch wall is "return" font annular shape, and the internal dimension is the same with the inboard oil groove inner wall of ditch wall oil groove, therefore just encircles around the oil groove inner wall when simulation ditch wall is placed in the ditch wall oil groove.
The inboard oil groove inner wall of ditch wall oil groove is slightly lower than the oil groove outer wall in the outside, and is highly the same with the simulation ditch wall of putting into, makes the experiment apron can stably arrange oil groove inner wall and simulation ditch wall top in to be convenient for change.
The upright column is a hydraulic automatic lifting column and has a lifting function. Consists of a sleeve and a lifting rod; the cross section of the upright post is circular, and a perforated internal thread and a matched threaded rod are arranged on the sleeve; the 8 lifting rods are respectively fixed on the lower surfaces of the oil groove of the groove wall and the pre-burning oil disc.
Wherein, precombustion food tray left side oil-out below is provided with the draw-in groove, and trickling fire oil groove right side one end is placed in the draw-in groove, can make precombustion food tray and ditch wall oil groove produce the difference in height through the adjustment stand to make the slope of trickling fire oil groove produce certain angle, change experimental parameters.
Wherein, food tray, ditch wall oil groove, trickling fire oil groove, draw-in groove, precombustion food tray are stainless steel material.
Wherein, the simulation trench wall is made of concrete material.
The oil tank outer wall outside the ditch wall oil tank is put to the left side one end of the flowing fire oil tank, and the flowing fire oil tank is not fixed, so that the position of the oil tray can be moved in the direction of the central line of the flowing fire oil tank, the position of the left side one end of the flowing fire oil tank on the experimental cover plate is changed, and experimental parameters are changed.
The combustible liquid which can be supplied to the experimental platform by the oil storage tank comprises common oil such as insulating oil in transformer substation oil filling equipment.
Wherein, oil groove outer wall bottom sets up the oil-out stop valve, can be used to the liquid of hoarding in the trench wall oil groove after the single experiment is accomplished and discharge to the food tray in, judge concrete burning condition and help the smooth expansion of experiment next time.
For a further understanding and appreciation of the structural features and advantages of the invention, reference should be made to the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings, in which:
as shown in fig. 1 and 2, the fire resistance test experiment platform for cable trench sealing measures near transformer substation oil filling equipment comprises a stand column 1, an oil pan 2, an oil pump 3, an oil tank 4, an oil delivery pipe 10, a pre-oil pan 6, a trickling oil tank 7, a data measurement system 6, a real-time monitoring system 8, a simulation trench wall 23, a trench wall oil tank 11 and an experiment cover plate 12, wherein the experiment platform is formed by connecting all parts through distribution, mechanical connection and transport pipelines.
In this embodiment, as shown in fig. 1 and 2, the oil pan 2 has a side length of 2.1m and a depth of 0.1m, four columns placed thereon are of a lifting type, the top is welded to the bottom of the oil groove 11 of the groove wall, the side length of the outer wall 14 of the oil groove is 2m and the height is 0.2m, the side length of the inner wall 13 of the oil groove is 1.2m and the height is 0.15m, and the depth of the oil groove 11 of the groove wall is 0.2 m. The simulation trench wall 23 is made of concrete and is of a structure in a shape like a Chinese character 'hui', the height of the simulation trench wall is the same as that of the inner wall 13 of the oil tank, the simulation trench wall is just embedded at the outer side of the inner wall 13 of the oil tank, and the simulation trench wall is flush in height.
In this embodiment, as shown in fig. 1, 3 experimental cover plates 12 are spliced and then placed above the simulated trench wall 23, and can completely cover the inner side area of the inner wall 13 of the oil groove, and the experimental cover plates 12 are made of a polymer material.
In this embodiment, as shown in fig. 1 and 2, the length of the fire oil flowing groove 7 is 1.7m, the depth thereof is 0.1m, both ends thereof are opened, the right side thereof is connected to the pre-oil pan 5, and the left side thereof is placed on the splice cover plate 12.
In the present embodiment, as shown in fig. 1 and 2, an oil pump 3 is connected to an oil storage tank 4 and a pre-oil pan 5 through an oil delivery pipe 10, and the pre-oil pan 5 is supported by four columns 1, and has a side length of 1m and a depth of 0.2 m.
In this embodiment, as shown in fig. 3, the column 1 is a hydraulic automatic lifting column and has a lifting function. Consists of a sleeve and a lifting rod; the cross section of the upright post is circular, and a perforated internal thread and a matched threaded rod are arranged on the sleeve; the 8 lifting rods are respectively fixed on the lower surfaces of the oil groove of the groove wall and the pre-burning oil disc. The height difference is generated between the pre-burning oil disc 5 and the experimental cover plate 12 through lifting, so that the flowing fire oil groove 7 is inclined at different angles, and experimental parameters are changed.
In this embodiment, as shown in fig. 1 and 4, a clamping groove is formed below an oil outlet on the left side of the pre-oil pan 5, one end of the right side of the fire trickling oil groove is placed in the clamping groove, a certain angle is generated by the inclination 7 of the fire trickling oil groove after the height difference is generated between the pre-oil pan 5 and the experimental cover plate 12, and the fire trickles fall from the oil outlet 28 to the fire trickling oil groove 7.
In this example, before the start of the experiment, a sufficient amount of insulating oil was filled in the oil storage tank 4, and a certain amount of water was added to the precombustion oil pan 5 to raise the oil level. After the experiment is started, firstly, the data acquisition equipment and the oil pump 3 are opened, the liquid level in the pre-oil pan 5 reaches a position slightly lower than the oil outlet 28, the insulating oil in the pre-oil pan 5 is ignited, and the oil temperature is preheated for 5 minutes. Through the analysis of the thermocouple 15 and the data acquisition equipment which are arranged above the central line of the pre-burning oil disc 5, after the temperature is stable, the flow of the oil pump 3 is increased, so that the flowing fire starts to spread to the flowing fire oil groove 7, and meanwhile, the spreading condition of the flowing fire is observed in real time through a camera in the real-time monitoring system 8. When the trickling fire forms a certain ignition area on the experimental cover plate 12, the flow of the oil pump 3 is reduced, the trickling fire spreading on the experimental cover plate 12 and the trickling fire generated in the pre-oil burning disc 5 reach dynamic balance, temperature data are collected by continuously utilizing thermocouples and data collection equipment which are arranged at the splicing gaps, the center and the edges of the cover plate under the experimental cover plate 6, and the ignition condition of the test cotton felt 17 is observed by utilizing the real-time monitoring system 8. When the temperature of the back plate reaches the set failure temperature or the test cotton felt 17 is ignited, the sealing measure in the experiment can be determined to be failed, the oil pump is closed, and meanwhile, the experiment data is recorded. When the platform temperature has dropped to a certain extent, the outlet port shut-off valve 9 is opened to allow the residual liquid mixture remaining in the trench wall oil sump 11 to flow out, and the combustion is observed and recorded. Change experiment apron 12, through the inclination of lift stand 1 adjustment trickling fire oil groove 7, through the position that the distance adjustment trickling fire that adjusts food tray 2 and precombustion food tray 5 reachd experiment apron 12, confirm the complete record of experimental data, the experiment parameter changes after correct, begins the experiment next time.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a near transformer substation's oil filling equipment cable pit enclosed measure fire-resistant test experiment platform which characterized in that: the device comprises a stand column (1), an oil pan (2), an oil pump (3), an oil tank (4), an oil conveying pipe (10), a pre-burning oil pan (5), a flowing fire oil groove (7), a data measuring system (6), a real-time monitoring system (8), a simulation trench wall (23), a trench wall oil groove (11) and an experiment cover plate (12); wherein:
the upright columns (1) are independently arranged below the oil groove (11) of the groove wall and the pre-oil disc (5), four upright columns are respectively arranged and distributed at four corners;
the oil pan (2) is arranged at the bottom of the upright post (1) below the oil groove (11) of the trench wall;
the oil pump (3), the oil tank (4) and the oil delivery pipe (10) jointly form an oil delivery system of the pre-combustion oil pan, and the oil delivery pipe (10) is connected to the middle of the right side of the pre-combustion oil pan (5);
the right side of the fire flowing oil groove (7) is inserted into a clamping groove (29) below an oil outlet (28) of the pre-oil burning disc (5);
the left opening of the fire trickling oil groove (7) is placed above the groove wall oil groove (11), the fire trickles from the pre-oil disc (5), and the fire trickling oil groove (7) gradually spreads to the groove wall oil groove (11) after the liquid level is higher than an oil outlet (28) of the pre-oil disc (5), and forms a combustion surface on the experimental cover plate (12);
the data measurement system (6) comprises a temperature measurement system and a thermal radiation measurement system;
the real-time detection system (8) comprises a digital camera recording system and a combustion indicating system;
the simulated trench wall (23) is placed in the trench wall oil groove (11).
2. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: the liquid level in the pre-oil burning disc (5) is controlled to be always higher than the oil outlet (28) by adjusting the flow of the oil pump (3), so that the flowing fire continuously spreads to the experimental cover plate (12) on the groove wall oil groove (11) through the flowing fire oil groove (7), and the combustion state of the flowing fire on the experimental cover plate (12) is kept.
3. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: the simulated trench wall (23) is in a shape of a Chinese character 'hui' and is in a ring shape, the inner dimension of the simulated trench wall is the same as that of the inner wall (13) of the oil groove at the inner side of the trench wall oil groove (11), and therefore the simulated trench wall (23) is just surrounded around the inner wall (13) of the oil groove when being placed in the trench wall oil groove (11).
4. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: the inner wall (13) of the oil groove at the inner side of the oil groove (11) of the groove wall is slightly lower than the outer wall (14) of the oil groove at the outer side, and the height of the inner wall is the same as that of the inserted simulation groove wall (23), so that the experiment cover plate (12) can be stably arranged above the inner wall (13) of the oil groove and the simulation groove wall (23) and is convenient to replace.
5. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: the upright post (1) is a hydraulic automatic lifting post, has a lifting function and consists of a sleeve (24) and a lifting rod (27); the cross section of the upright post (1) is circular, and a perforated internal thread (25) and a matched threaded rod (26) are arranged on the sleeve (24); the 8 lifting rods (28) are respectively fixed on the lower surfaces of the oil groove (11) of the trench wall and the pre-oil burning disc (5).
6. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: be provided with draw-in groove (29) below oil-out (28) in precombustion dish (5) left side, trickling oil groove (7) right side one end is placed in draw-in groove (29), can make precombustion dish (5) and ditch wall oil groove (11) produce the difference in height through adjustment stand (1) to make trickling oil groove (7) slope produce certain angle, change experimental parameters.
7. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: one end of the left side of the fire trickling oil groove (7) is placed on the outer wall (14) of the oil groove on the outer side of the groove wall oil groove (11) without fixation, so that the position of the oil disc (2) can be moved along the direction of the central line of the fire trickling oil groove (7), the position of one end of the left side of the fire trickling oil groove (7) on the experimental cover plate (12) is changed, and experimental parameters are changed.
8. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: the temperature measuring system in the data measuring system (6) comprises thermocouples (16) close to the back fire surface of the experimental cover plate (12), thermocouples (15) distributed below the liquid level of the longitudinal center line of the pre-combustion oil pan and on the liquid level at equal intervals and data acquisition equipment; the thermal radiation measurement system comprises a heat flow meter (18) and a data acquisition device which are distributed right in front of the trench wall oil groove (11) and the pre-oil pan (5).
9. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: the digital camera recording system in the real-time monitoring system (8) comprises a camera (22) arranged right in front of the experiment platform, a camera (20) arranged above the left side, a camera (21) arranged above the rear side and a camera (19) arranged at the bottom of the cover plate, and is used for observing the actual conditions of each position of the experiment platform in the experiment process; the combustion indicating system comprises two testing cotton felts arranged on the back fire surface of the experimental cover plate (12) and is used for judging whether the back fire surface achieves a flammable environment in the experimental process.
10. The fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil-filled equipment according to claim 1, characterized in that: combustible liquid which can be supplied to the experimental platform through the oil storage tank (4) comprises common oil in transformer substation oil filling equipment, including insulating oil;
the bottom of the oil groove outer wall (14) is provided with an oil outlet stop valve (9) which can be used for discharging liquid accumulated in the oil groove (11) of the trench wall after the completion of a single experiment into the oil pan (2), judging the specific combustion condition and facilitating the smooth expansion of the next experiment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011184116.7A CN112198272A (en) | 2020-10-29 | 2020-10-29 | Fire-resistant test experiment platform for cable trench sealing measures near transformer substation oil filling equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823167A (en) * | 2021-08-31 | 2021-12-21 | 国网湖南省电力有限公司 | Cable tunnel fire simulation system |
| CN114973893A (en) * | 2022-04-21 | 2022-08-30 | 国网江苏省电力有限公司 | Cable pit fire simulation and fire extinguishing experiment platform |
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2020
- 2020-10-29 CN CN202011184116.7A patent/CN112198272A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113823167A (en) * | 2021-08-31 | 2021-12-21 | 国网湖南省电力有限公司 | Cable tunnel fire simulation system |
| CN114973893A (en) * | 2022-04-21 | 2022-08-30 | 国网江苏省电力有限公司 | Cable pit fire simulation and fire extinguishing experiment platform |
| CN114973893B (en) * | 2022-04-21 | 2024-05-14 | 国网江苏省电力有限公司 | Cable pit fire simulation and fire extinguishing experiment platform |
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