Distribution network electrical fire extinguishing real-model test platform and test method thereof

Abstract

The invention discloses a distribution network electrical fire extinguishing real-model test platform, and relates to the technical field of distribution network electrical fire extinguishing real-model test, and the platform comprises a storage unit which comprises a storage rack, a mounting groove, a fire making rack, a fire extinguishing unit and an adjusting unit. And the fire extinguishing unit comprises a mounting plate, a fire extinguishing nozzle, a monitoring module, a control valve and a gas storage bottle. Through the arrangement of the adjusting unit, the fire making frame and the fire extinguishing unit, a fire source and a fire extinguishing device can be rapidly and repeatedly arranged. The simple rope pulling operation is converted into accurate and continuous jumping of the clamping column between the mounting grooves. An operator can easily and stably move the fire making frame or the fire extinguishing unit module to any target height in the vertical direction without disassembling any bolt, and stepless adjustment can be achieved between adjacent mounting grooves.

Description

Technical Field

[0001] This invention relates to the technology for real-scale testing of electrical fires in distribution networks, and in particular to a real-scale testing platform and testing method for extinguishing electrical fires in distribution networks. Background Technology

[0002] The real-world testing study of the fire characteristics of electrical equipment in power distribution networks and the effectiveness of fire extinguishing technologies has profound theoretical and engineering value for verifying and optimizing existing fire extinguishing schemes, developing new fire prevention technologies, and formulating scientific operation and maintenance standards.

[0003] However, current testing and research methods for electrical fires in power distribution networks still have significant shortcomings. Traditional testing methods often employ simply constructed combustion platforms and fixed fire extinguishing devices, which are insufficient to accurately and flexibly simulate the complex and ever-changing real fire source locations inside electrical cabinets (such as different ignition points like top cables, middle circuit breakers, and bottom cable joints). During testing, the relative spatial relationship (distance, orientation, and height) between the fire source and the fire extinguishing unit often relies on rough manual estimation and temporary fixing, resulting in poor consistency and repeatability of test conditions. This makes it difficult to scientifically compare and analyze test results from different batches or institutions. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this invention is that the current testing and research methods for electrical fires in power distribution networks still have significant limitations.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a real-type test platform for fire extinguishing of electrical fires in power distribution networks, which includes a storage unit comprising multiple pairs of storage racks installed on both sides inside the electrical cabinet; The shelf has multiple equally spaced mounting slots along its length. A fire starter is installed between two adjacent shelves; The fire extinguishing unit is located on the opposite side of the fire-starting rack; And an adjustment unit for installing the fire starter and the fire extinguishing unit in the mounting slots at different positions; The fire extinguishing unit includes a mounting plate installed on one side of two adjacent adjustment units, a fire extinguishing nozzle installed on the inner side of the mounting plate, a monitoring module installed on both sides of the fire extinguishing nozzle, a control valve connected to one side of the fire extinguishing nozzle, and a gas storage cylinder connected to one end of the control valve. The control valve is used to control the flow of the extinguishing medium from the fire extinguishing nozzle.

[0006] In a preferred embodiment of the distribution network electrical fire extinguishing simulation test platform of the present invention: the mounting plate includes a base plate, a raised stop mounted on the base plate, a sliding groove opened at the end of the raised stop, mounting ends provided at both ends of the raised stop, and an L-shaped plate fixedly mounted at the bottom of the mounting ends.

[0007] In a preferred embodiment of the distribution network electrical fire extinguishing simulation test platform of the present invention: the fire-starting frame includes a horizontal plate installed inside two adjacent adjustment units, a sliding groove opened inside the horizontal plate, a U-shaped frame slidably connected to the inside of the sliding groove, fasteners connected to the end of the U-shaped frame, and a fire basin mounted on the end of the U-shaped frame.

[0008] In a preferred embodiment of the fire extinguishing simulation test platform for electrical fires in the power distribution network described in this invention: sliders are respectively provided on the back of the fire extinguishing nozzle and the monitoring module; The slider is slidably connected to a groove formed on the mounting plate.

[0009] In a preferred embodiment of the distribution network electrical fire extinguishing simulation test platform of the present invention: the monitoring module includes a temperature probe, a smoke density probe connected to one side of the temperature probe, and a heat release probe connected to the other side of the smoke density probe.

[0010] In a preferred embodiment of the distribution network electrical fire extinguishing simulation test platform of the present invention: the adjustment unit includes a snap-fit ​​component that is rotatably snapped into the mounting slot, a connecting plate hinged to the back of the snap-fit ​​component, and a drive component connected to the back of the connecting plate.

[0011] In a preferred embodiment of the distribution network electrical fire extinguishing simulation test platform of the present invention: the snap-fit ​​component includes a rotating plate and snap-fit ​​posts hinged to both sides of the rotating plate; The driving component includes an intermediate gear hinged to both sides of the connecting plate, a rotating gear meshing in the middle of the intermediate gear, a connecting post protruding from the back of the rotating gear, and a pull rope wrapped around the periphery of the connecting post.

[0012] In a preferred embodiment of the distribution network electrical fire extinguishing simulation test platform of the present invention: the slider includes a slider body and rollers hinged to both sides of the slider body.

[0013] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a real-type test method for fire extinguishing in power distribution network electrical fires, wherein the fire-starting rack and the fire extinguishing unit are respectively installed on the mounting slots at different heights of the shelf through the adjustment unit, so as to set the relative position between the two; The fire source on the fire starter is ignited, fire data is collected through the monitoring module of the fire extinguishing unit, and the fire extinguishing unit is controlled to perform fire extinguishing actions. Record data from the ignition of the fire to the completion of the fire extinguishing process.

[0014] In a preferred embodiment of the fire extinguishing simulation test method for electrical fires in the power distribution network described in this invention: by operating the adjustment unit, the locking pins of the locking member switch between adjacent mounting slots of the shelf to achieve continuous stepless height adjustment of the fire-starting rack or fire-extinguishing unit in the vertical direction.

[0015] The beneficial effects of this invention are that, through the adjustment unit, the fire-starting rack, and the fire-extinguishing unit, the device achieves rapid and repeatable deployment of the fire source and fire-extinguishing device. It transforms the simple rope-pulling operation into precise and continuous adjustment of the clamping posts between mounting slots. Operators can easily and smoothly move the fire-starting rack or fire-extinguishing unit module vertically to any target height without disassembling any bolts, and stepless adjustment is possible between adjacent mounting slots. Furthermore, the height of the fire source, the height of the fire-extinguishing unit, and the relative vertical distance between them can all be accurately measured and recorded. The spatial layout parameters of any successful test scenario can be archived, and the data can be collected synchronously in multiple dimensions, creating a realistic testing platform for fire extinguishing in power distribution networks. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the structure of the distribution network electrical fire extinguishing real-scale test platform of the present invention is shown; Figure 2 A schematic diagram of the application structure of the present invention is shown; Figure 3 A schematic diagram of the fire extinguishing unit structure of the present invention is shown; Figure 4 A schematic diagram of the fire starter structure of the present invention is shown; Figure 5 A schematic diagram of the monitoring module structure of the present invention is shown; Figure 6 An exploded view of the regulating unit structure of the present invention is shown; Figure 7 A schematic diagram of the rear structure of the fire extinguishing unit of the present invention is shown. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Reference Figures 1 to 7 This embodiment provides a real-world test platform for fire extinguishing in electrical distribution networks, including a storage unit 1 comprising multiple pairs of storage racks 11 installed on both sides inside the electrical cabinet; The shelf 11 has multiple equally spaced mounting slots 111 along its length; The fire starter 2 is installed between two adjacent shelves 11; Fire extinguishing unit 3 is located on the opposite side of fire starter 2; And the adjustment unit 4 is used to install the fire starter 2 and the fire extinguishing unit 3 in the mounting slots 111 at different positions; The fire extinguishing unit 3 includes a mounting plate 31 installed on one side of two adjacent adjustment units 4, a fire extinguishing nozzle 32 installed on the inside of the mounting plate 31, a monitoring module 33 installed on both sides of the fire extinguishing nozzle 32, a control valve 34 connected to one side of the fire extinguishing nozzle 32, and a gas storage cylinder 35 connected to one end of the control valve 34. The control valve 34 is used to control the flow of the extinguishing medium in the fire extinguishing nozzle 32.

[0020] Furthermore, sliders 5 are respectively provided on the back of the fire extinguishing nozzle 32 and the monitoring module 33; The slider 5 is slidably connected to the groove 313 formed on the mounting plate 31.

[0021] Furthermore, the monitoring module 33 includes a temperature probe 331, a smoke density probe 332 connected to one side of the temperature probe 331, and a heat release probe 333 connected to the other side of the smoke density probe 332.

[0022] In this embodiment, the shelf 11 can modularly install the fire starter 2 and the fire extinguishing unit 3 inside the electrical cabinet. The shelf 11 is made of aluminum angle steel, and two of them are arranged parallel to each other and facing each other inside the electrical cabinet to support the fire starter 2 and the fire extinguishing unit 3. The shelf 11 has multiple equally spaced mounting slots 111, which are evenly distributed along the length of the shelf 11 to cooperate with the adjustment unit 4 to achieve multi-level positioning of the fire starter 2 and the fire extinguishing unit 3 in the vertical plane.

[0023] Preferably, each shelf 11 has a series of equally spaced rectangular mounting slots 111 extending along its length, forming a longitudinally arranged positioning hole system. The openings of the mounting slots 111 face upwards, facilitating the fixing of the adjustment unit 4 within the mounting slot 111 at a specified height, thereby enabling flexible vertical adjustment of the fire-starting rack 2 and the fire-extinguishing unit 3.

[0024] The fire starter 2 is used to simulate electrical fire scenarios. Standard combustibles can be placed on it to simulate electrical fires. The fire starter 2 has a rectangular frame structure. Its two sides are detachably fixed to the opposite sides of two shelves 11 through the adjustment unit 4. The ignition position is realized through the mounting slot 111. The shelves 11 on which the fire starter 2 is mounted are close to the conventional layout area of ​​the heating components in the electrical cabinet to ensure that the simulated fire source position matches the actual electrical fire.

[0025] Preferably, the fire extinguishing unit 3 is located on the opposite side of the fire starter 2. It is installed on the opposite shelf 11 through another set of adjustment units 4, and the relative position of the two in the vertical direction can be changed by selecting different or the same mounting slot 111 as the fire starter 2, so as to test the response performance of the fire extinguishing unit 3 at different heights of fire source positions.

[0026] Specifically, each end of the mounting plate 31 has a horizontally extending mounting lug, which is fastened to the end of the adjusting unit 4 by bolts. A continuous T-shaped cross-section groove 313 is machined horizontally on the front side of the mounting plate 31. A T-shaped slider 5, matching the cross-section of the groove 313, is fixedly connected to the rear of the base of the fire extinguishing nozzle 32 and the rear of the housing of each monitoring module 33. By inserting the slider 5 into the end of the groove 313, the fire extinguishing nozzle 32 and each monitoring module 33 are slidably mounted on the front side of the mounting plate 31 and can slide independently laterally along the groove 313. After sliding to a predetermined position, the slider 5 can be locked in place within the groove 313 by tightening the screws on it.

[0027] Preferably, the monitoring module 33 is an integrated sensing housing, with a slider 5 on the back of the housing that mates with the slide groove 313 of the mounting plate 31. The front of the housing of the monitoring module 33 has three independent mounting interfaces. These interfaces are used to fix the temperature probe 331, the smoke density probe 332, and the heat release probe 333, respectively.

[0028] The temperature probe 331 uses a type K thermocouple. Its sensing end is fixed through a threaded interface on the upper part of the housing and protrudes from the outer surface of the housing, so that its metal probe is directly exposed in the test chamber for continuous monitoring of air temperature changes near the fire source.

[0029] The smoke density probe 332 is a through-beam photoelectric smoke sensor, with an infrared emitting tube and a photoelectric receiving tube embedded on both sides of the middle of the sensing surface of the housing. When fire smoke enters the optical path, it causes light intensity attenuation, and the probe quantifies the smoke density by measuring the rate of change of the received signal.

[0030] The heat release probe 333 is based on the principle of oxygen consumption. A high-temperature resistant sampling tube inlet is located at the bottom of the housing. A small air pump continuously draws in gas from the test area, which is then filtered and cooled internally before being sent to the oxygen analyzer. By measuring the rate of decrease in oxygen concentration in the airflow and combining this with flow data, the heat release rate of the fire source is calculated in real time. The sensing elements of each probe are oriented to ensure that their effective monitoring surface faces the fire starter 2. The outgoing cables are neatly embedded in the cable groove on the back of the mounting plate 31 and ultimately connected to the central data processing system.

[0031] Preferably, the control valve 34 is an imported normally closed solenoid valve with a rated working pressure not lower than the storage pressure of the extinguishing medium. Its inlet is connected to the outlet valve of the gas cylinder 35 via a high-pressure hose with a metal braided mesh sheath. Its outlet is sealed to the inlet of the fire extinguishing nozzle 32 via a stainless steel rigid pipe using a flange joint. The gas cylinder 35 is rigidly fixed to the bottom of the test platform frame or the simulated electrical cabinet by a clamp-type bracket with shock-absorbing rubber pads. The extinguishing medium filled inside the gas cylinder 35 is perfluorohexanone. Perfluorohexanone rapidly vaporizes at high temperatures, releasing a large amount of endothermic gas, effectively reducing the temperature of the combustion zone.

[0032] In use, the operator selects the corresponding height mounting slots 111 on two shelves 11, inserts the fixed ends of the two sets of adjustment units 4 into the selected mounting slots 111 respectively, connects and locks the left and right sides of the fire starter 2 to the movable ends of the two sets of adjustment units 4 respectively, and completes the vertical positioning of the fire source. On the shelf 11 opposite to the fire starter 2, select the corresponding height mounting slot 111 and install the other set of adjustment units 4 in the same way. Connect and lock the mounting ears on the back of the mounting plate 31 of the fire extinguishing unit 3 to the movable ends of the adjustment units 4, and complete the initial vertical positioning of the fire extinguishing unit 3.

[0033] Subsequently, the standard fire source on the fire starter 2 is ignited. The heat generated by the combustion of the fire source is quickly captured by the monitoring module 33. After receiving the opening signal, the control valve 34 is energized and activated. Under pressure, the perfluorohexanone extinguishing medium in the gas cylinder 35 is sprayed out from the extinguishing nozzle 32 to extinguish the fire. The central data processing system in the background synchronously records the temperature, smoke density, and heat release rate change curves of the extinguishing process in different locations of the extinguishing unit 3.

[0034] Reference Figures 1-4As an optional embodiment, in one embodiment provided by the present invention, the fire rack 2 includes a horizontal plate 21 installed inside two adjacent adjustment units 4, a moving groove 22 opened inside the horizontal plate 21, a U-shaped frame 23 slidably connected to the inside of the moving groove 22, a fastener 24 connected to the end of the U-shaped frame 23, and a fire basin 25 mounted on the end of the U-shaped frame 23.

[0035] In this embodiment, the horizontal plate 21 is a rectangular metal plate, and its two ends are fixedly connected to the movable ends of two adjacent adjusting units 4 by bolts, thereby achieving stable installation in the vertical plane. A moving groove 22 is machined along its length. The U-shaped frame 23 is formed by bending a metal rod, and a slider matching the cross-sectional shape of the moving groove 22 is fixedly connected to the ends of the two legs at its open end. By inserting these two sliders into the ends of the moving groove 22, the entire U-shaped frame 23 can slide horizontally along the length of the moving groove 22. A flat surface or latch is provided at the top of the closed end of the U-shaped frame 23 for support.

[0036] Fastener 24 can be a wing bolt, with its threaded portion passing through a threaded hole on the side wall of the U-shaped frame 23, and its end abutting against the movable groove 22. Tightening fastener 24 can lock the U-shaped frame 23 into any predetermined horizontal position on the movable groove 22.

[0037] Preferably, the fire basin 25 is a high-temperature resistant metal container that can be stably mounted on the U-shaped frame 23. The fire basin 25 is used to hold and ignite liquid fuels such as n-heptane or solid combustibles according to test standards to simulate a stable and reproducible electrical fire source.

[0038] Preferably, scale grooves are formed on the end faces of the horizontal plate 21 and the height-adjusting bracket 312. The scale grooves are evenly distributed along the length direction to indicate the horizontal position of the U-shaped bracket 23 on the horizontal plate 21 and the position of the fire extinguishing nozzle 32 or the monitoring module 33 on the height-adjusting bracket 312.

[0039] Reference Figures 5-7 As an optional embodiment, in one embodiment provided by the present invention, the adjustment unit 4 includes a snap-fit ​​member 41 that is rotatably snapped into the mounting groove 111, a connecting plate 42 hinged to the back of the snap-fit ​​member 41, and a drive member 43 connected to the back of the connecting plate 42.

[0040] Furthermore, the snap-fit ​​component 41 includes a rotating piece 411 and snap-fit ​​posts 412 hinged to both sides of the rotating piece 411. The drive unit 43 includes an intermediate gear 431 hinged to both sides of the connecting plate 42, a rotating gear 432 meshing in the middle of the intermediate gear 431, a connecting post 433 protruding from the back of the rotating gear 432, and a pull rope 434 wrapped around the connecting post 433.

[0041] Furthermore, the slider 5 includes a slider body 51 and rollers 52 hinged to both sides of the slider body 51.

[0042] In this embodiment, as Figure 6 As shown, the snap-fit ​​component 41 consists of a single-piece main body, namely a rotating plate 411, and two cylindrical snap-fit ​​pins 412. The rotating plate 411 has a through hole in its center and hinge holes extending through both sides. The through hole of the rotating plate 411 is used to connect with the axis of the intermediate gear 431 on the back of the connecting plate 42, while the hinge holes on both sides are used to install the snap-fit ​​pins 412. The snap-fit ​​pins 412 are fixedly installed on both sides of the rotating plate 411 through the hinge holes, enabling the two sets of snap-fit ​​pins 412 to rotate synchronously around the axis of the through hole of the rotating plate 411, thereby achieving self-adaptive alignment when snapped into the mounting groove 111.

[0043] The connecting plate 42 is a rectangular metal plate with a double lug at one end to connect the shafts of two sets of rotating plates 411 at the same time. The other end of the connecting plate 42 is provided with several threaded holes for fastening to the cross plate 21 of the fire starter 2 or the mounting plate 31 of the fire extinguishing unit 3 by bolts.

[0044] Preferably, two symmetrically arranged intermediate gears 431 are simultaneously hinged to the back of the lugs on both sides of the connecting plate 42 and are interference-fitted with the through hole in the center of the rotating plate 411; a rotating gear 432 is provided between the two symmetrically arranged intermediate gears 431, which meshes with the intermediate gears 431 and can rotate around its own axis; a connecting post 433 protruding from the back of the rotating gear 432 is used to wind the pull rope 434.

[0045] When the pull rope 434 is pulled, it drives the rotating gear 432 to rotate. The rotating gear 432 drives the two intermediate gears 431 to rotate synchronously through meshing transmission. The rotation of the intermediate gears 431 is transmitted to the rotating plate 411 through interference fit, thereby driving the rotating plate 411 to rotate synchronously around its central axis. The synchronous rotation of the rotating plate 411 drives the two locking posts 412 to rotate. During the rotation, the locking posts 412 contact the inner wall of the mounting groove 111 and generate relative sliding.

[0046] As the locking pin 412 rotates, it sequentially switches its locking position between adjacent mounting slots 111, achieving continuous displacement adjustment of the adjustment unit 4. The two ends of the pull rope 434 are respectively wound around the connecting pin 433. When the pull rope 434 is pulled to rotate the rotating gear 432, the pull rope 434 is wound up or released. Pulling one end of the pull rope 434 causes the rotating gear 432 to rotate forward, which in turn meshes and drives the two intermediate gears 431 to rotate synchronously in reverse, causing the rotating plates 411 to rotate synchronously in the opposite direction. This drives the locking pin 412 to disengage from the current mounting slot 111 and turn into the next adjacent mounting slot 111 at the upper end. When the other end of the pull rope 434 is pulled, the rotating gear 432 rotates in the opposite direction, driving the locking pin 412 to disengage from the current mounting slot 111 and turn into the next adjacent mounting slot 111 at the lower end, completing the vertical displacement adjustment of the adjustment unit 4 driving the fire starter 2 or fire extinguishing unit 3.

[0047] Preferably, the slider body 51 is machined from a single piece of metal, and its cross-sectional shape forms a precise dynamic fit with the T-shaped groove 313 on the mounting plate 31. On the lower sides of the slider body 51, a roller 52 is mounted via a precision needle roller bearing on each side. When the slider 51 is placed into the groove 313, the roller 52 contacts the bottom surface of the groove 313, i.e., the horizontal load-bearing surface of the T-shape. A vertical threaded hole is machined at the top center of the slider body 51 for installing a set screw to achieve final locking.

[0048] In summary, this device, through the adjustment unit, the fire-starting rack 2, and the fire-extinguishing unit 3, achieves rapid and repeatable deployment of the fire source and fire-extinguishing device. It transforms simple rope-pulling operations into precise and continuous movement of the locking post 412 between mounting slots 111. Operators can easily and smoothly move the fire-starting rack 2 or fire-extinguishing unit 3 module vertically to any target height without disassembling any bolts, and stepless adjustment is possible between adjacent mounting slots 111. Furthermore, the height of the fire source, the height of the fire-extinguishing unit, and the relative vertical distance between them can all be accurately measured and recorded. The spatial layout parameters of any successful test scenario can be archived, and the data can be collected synchronously in multiple dimensions, making it a true-to-life test platform for fire extinguishing in power distribution networks.

[0049] As an optional embodiment, in one embodiment provided by the present invention, the fire starter and the fire extinguishing unit are respectively installed on the mounting slots at different heights of the shelf through the adjustment unit, so as to set the relative position between the two. The fire source on the fire starter is ignited, fire data is collected through the monitoring module of the fire extinguishing unit, and the fire extinguishing unit is controlled to perform fire extinguishing actions. Record data from the ignition of the fire to the completion of the fire extinguishing process.

[0050] Furthermore, by operating the adjustment unit, the locking pins of the locking component switch between adjacent mounting slots on the shelf to achieve continuous stepless height adjustment of the fire-starting rack or fire-extinguishing unit in the vertical direction.

[0051] In this embodiment, the operator determines the initial installation height H1 of the fire source ignition rack 2 and the initial installation height H2 of the fire extinguishing unit 3 based on the target test scenario, such as simulating a cable fire at the bottom of a switch cabinet. The height is determined by selecting the corresponding mounting slot 111 on the shelf 11.

[0052] By manually or with a tool pulling the rope 434 of the adjusting unit 4, the rotating gear 432 is driven to rotate. This rotation is transmitted to the rotating plate 411 through the meshing intermediate gears 431 on both sides, causing the locking pins 412 on both sides to rotate synchronously, disengaging them from the current mounting slot 111 and allowing them to enter the next set of mounting slots 111. Continuing to pull the rope 434 can drive the locking pins 412 to precisely screw into the adjacent mounting slots 111 above or below, thereby achieving continuous, stepless height adjustment of the fire starter 2 or fire extinguishing unit 3 in the vertical direction until the target height H1 or H2 is reached, and a stable fixation is achieved through the self-locking function of the driving component 43.

[0053] Subsequently, loosen the set screws on the fire extinguishing nozzle 32 and the slider 5 of the monitoring module 33, and slide them laterally in the T-shaped groove 313 of the mounting plate 31 so that the fire extinguishing nozzle 32 is aligned with the center area of ​​the fire starter 2, and the sensing surfaces of each monitoring probe are facing the predetermined key monitoring points such as the root of the flame and the center of the smoke plume. Then tighten the set screws.

[0054] Connect the signal cable to the central data processing system, check the pressure of gas cylinder 35 and the status of control valve 34, and complete the system verification.

[0055] A fixed amount of n-heptane fuel is injected into the fire pit 25 of the fire stand 2 as specified and ignited to simulate an electrical fire.

[0056] The monitoring module 33 on the fire extinguishing unit 3 immediately starts working: the temperature probe 331, such as a K-type thermocouple, monitors the air temperature rise curve in real time; the smoke density probe 332 quantifies the change in smoke concentration by measuring the attenuation rate of the infrared beam; and the heat release probe 333 calculates the real-time heat release rate by continuously sampling and analyzing the oxygen concentration in the gas. All data is synchronously transmitted to the central data processing system.

[0057] When the central data processing system determines that a predetermined fire development stage has been reached based on received real-time data, such as temperature exceeding a preset threshold or smoke density growth rate reaching alarm conditions, it automatically generates a trigger signal.

[0058] A trigger signal is sent to control valve 34, which is normally closed solenoid valve, to energize and open it. The perfluorohexanone extinguishing medium stored in the gas cylinder 35 is rapidly ejected under pressure through the high-pressure hose, control valve 34, and stainless steel rigid pipe from the precisely positioned extinguishing nozzle 32 to directionally suppress and extinguish the fire source.

[0059] The central data processing system records the following time-series data synchronously from the moment of ignition until a period of time after the flame is completely extinguished: the raw data of each probe and derived characteristic parameters such as the highest temperature, the maximum smoke density, the peak heat release rate, the opening and closing time of control valve 34, and the duration of extinguishing agent spraying.

[0060] After the test, the fire starter 2 and fire extinguishing unit 3 can be easily reset to their initial heights H1 and H2 by pulling the rope of the adjustment unit 4, or adjusted to a new preset height according to the next test plan. Since all position adjustments are based on the precise array of mounting slots 111 on the shelf 11 and the precise drive of the adjustment unit 4, it can be ensured that the spatial layout parameters of the same test scenario can be completely and accurately reproduced, thereby enabling repeatability verification or comparative experiments.

[0061] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

[0062] Importantly, the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A distribution network electrical fire extinguishing real model test platform, characterized in that: include, The storage unit (1) includes multiple pairs of storage shelves (11) installed on both sides inside the electrical cabinet; The shelf (11) has multiple equally spaced mounting slots (111) along its length. A fire starter (2) is installed between two adjacent shelves (11); The fire extinguishing unit (3) is located on the opposite side of the fire-starting rack (2); And the adjustment unit (4) is used to install the fire-starting rack (2) and the fire-extinguishing unit (3) on the mounting slots (111) at different positions; The fire extinguishing unit (3) includes a mounting plate (31) installed on one side of two adjacent adjustment units (4), a fire extinguishing nozzle (32) installed on the inner side of the mounting plate (31), a monitoring module (33) installed on both sides of the fire extinguishing nozzle (32), a control valve (34) connected to one side of the fire extinguishing nozzle (32), and a gas storage cylinder (35) connected to one end of the control valve (34). The control valve (34) is used to control the flow of the extinguishing medium in the fire extinguishing nozzle (32).

2. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to claim 1, characterized in that: The mounting plate (31) includes a base plate (311), a scaffold stop (312) mounted on the base plate (311), a slide groove (313) opened at the end of the scaffold stop (312), mounting ends (314) provided at both ends of the scaffold stop (312), and an L-shaped plate (315) fixedly mounted on the bottom of the mounting end (314).

3. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to claim 1 or 2, characterized in that: The fire-starting frame (2) includes a horizontal plate (21) installed inside two adjacent adjustment units (4), a moving groove (22) opened inside the horizontal plate (21), a U-shaped frame (23) slidably connected to the moving groove (22), a fastener (24) connected to the end of the U-shaped frame (23), and a fire basin (25) mounted on the end of the U-shaped frame (23).

4. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to claim 3, characterized in that: The back of the fire extinguishing nozzle (32) and the monitoring module (33) are respectively provided with sliders (5); The slider (5) is slidably connected to the groove (313) formed on the mounting plate (31).

5. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to claim 1, characterized in that: The monitoring module (33) includes a temperature probe (331), a smoke density probe (332) connected to one side of the temperature probe (331), and a heat release probe (333) connected to the other side of the smoke density probe (332).

6. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to any one of claims 1 to 5, characterized in that: The adjustment unit (4) includes a snap-fit ​​member (41) that is rotatably snapped into the mounting groove (111), a connecting plate (42) hinged to the back of the snap-fit ​​member (41), and a drive member (43) connected to the back of the connecting plate (42).

7. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to claim 6, characterized in that: The snap-fit ​​component (41) includes a rotating plate (411) and snap-fit ​​posts (412) hinged to both sides of the rotating plate (411). The drive unit (43) includes an intermediate gear (431) hinged to both sides of the connecting plate (42), a rotating gear (432) meshing in the middle of the intermediate gear (431), a connecting post (433) protruding from the back of the rotating gear (432), and a pull rope (434) wrapped around the periphery of the connecting post (433).

8. The fire extinguishing simulation test platform for electrical fires in power distribution networks according to claim 4, characterized in that: The slider (5) includes a slider body (51) and rollers (52) hinged to both sides of the slider body (51).

9. A method for testing electrical fire extinguishing performance of a distribution network, characterized in that: Including a fire extinguishing simulation test platform for electrical fires in power distribution networks as described in any one of claims 1 to 8, and The fire starter and fire extinguishing unit are respectively installed on mounting slots at different heights of the shelf via adjustment units to set their relative positions. The fire source on the fire starter is ignited, fire data is collected through the monitoring module of the fire extinguishing unit, and the fire extinguishing unit is controlled to perform fire extinguishing actions. Record data from the ignition of the fire to the completion of the fire extinguishing process.

10. The method for realistic testing of electrical fire extinguishing in power distribution networks according to claim 9, characterized in that: By operating the adjustment unit, the locking pins of the locking components switch between adjacent mounting slots on the shelf to achieve continuous stepless height adjustment of the fire starter or fire extinguishing unit in the vertical direction.

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