Fire extinguishing effect testing device for perfluorohexanone fire extinguishing paste

Abstract

The invention provides a perfluorohexanone fire extinguishing paste fire extinguishing effect testing device which comprises a testing box and a testing mechanism arranged in the testing box. The test mechanism comprises a plurality of temperature sensors arranged in the test box, a fire simulation device, a high-speed camera for acquiring image data of a fire simulation position, and an exhaust assembly for exhausting vaporized perfluorohexanone in the test box; the plurality of temperature sensors are respectively used for collecting the temperature change of the attaching position of the perfluorohexanone fire extinguishing paste, simulating the temperature change of the fire position and the temperature change of different heights in the test box from bottom to top; the fire simulation device comprises a short-circuit fire simulation mechanism used for simulating the short-circuit fire of the electrical equipment and the communication equipment, and an open fire simulation assembly used for simulating open fire. According to the invention, electrical short-circuit sparks and continuous open fire can be accurately simulated, and the accuracy of test data is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of fire extinguishing performance testing, and particularly to a testing device for the fire extinguishing effect of a perfluoromethylcyclohexanone fire extinguishing patch. Background Art

[0002] As a new type of clean gas fire extinguishing agent, perfluoromethylcyclohexanone gradually replaces traditional halons and some fluorinated hydrocarbon fire extinguishing agents due to its environmental friendliness, high fire extinguishing performance and electrical insulation characteristics, and is widely used especially in precision equipment places such as data centers, communication base stations, and power facilities.

[0003] In recent years, perfluoromethylcyclohexanone fire extinguishing patches (self-triggering fire extinguishing devices that can be attached to the surface of equipment) have become a research hotspot in the field of local fire protection due to their portability, no need for external power support, and rapid response, especially in the application of extinguishing electrical equipment and communication equipment. However, its actual fire extinguishing effect is affected by various factors, mainly including:

[0004] 1. Fire extinguishing agent release characteristics: The vaporization heat absorption rate and diffusion uniformity of perfluoromethylcyclohexanone directly affect the flame suppression efficiency;

[0005] 2. Adaptability to fire source types: The combustion characteristic differences of different fire sources such as electrical short-circuit sparks and continuous open flames may cause the fire extinguishing patch to fail to respond;

[0006] 3. Environmental interference: Airflow and temperature gradients in a confined space may interfere with the distribution of the fire extinguishing agent.

[0007] Existing testing methods mostly target traditional fire extinguishing systems and lack special testing devices for the local application scenario of fire extinguishing patches. The existing testing methods are as follows:

[0008] When testing the fire extinguishing effect with traditional devices, a fire extinguishing device is installed in a test chamber, combustibles are placed and ignited in the test chamber to simulate a fire scene, then the test chamber door is closed, and the fire extinguishing process and effect are observed and recorded through the transparent plate on the chamber door. After the flame goes out, the chamber door is opened, the combustibles are re-ignited and the chamber door is closed again, and the test is repeated to evaluate the fire extinguishing effect.

[0009] However, this testing device has the following key defects:

[0010] 1. Single fire source simulation: Only ordinary combustibles (such as alcohol pan fires) are used for ignition, and complex fire situations such as electrical equipment short-circuit sparks and arc jets cannot be reproduced, resulting in insufficient verification of the applicability of the fire extinguishing patch;

[0011] 2. Inaccurate test data: The chamber door is directly opened and re-ignited after the flame goes out. Due to the influence of the residual fire extinguishing agent in the test chamber, the fire extinguishing effect of subsequent tests may be interfered, affecting the reliability of the data. Summary of the Invention

[0012] In view of the above technical problems, the present invention provides a test device for the fire extinguishing effect of a perfluoromethylcyclohexanone fire extinguishing patch, which can accurately simulate electrical short - circuit sparks and continuous open flames, ensuring the accuracy of test data.

[0013] To achieve the above object, the present invention provides the following technical solution: A test device for the fire extinguishing effect of a perfluoromethylcyclohexanone fire extinguishing patch, comprising a test chamber and a test mechanism arranged in the test chamber. The test mechanism includes a plurality of temperature sensors arranged in the test chamber, a simulated fire - starting device, a high - speed camera for collecting image data of the simulated fire - starting position, and an exhaust assembly for discharging vaporized perfluoromethylcyclohexanone in the test chamber; the plurality of temperature sensors are respectively used for collecting the temperature change at the position where the perfluoromethylcyclohexanone fire extinguishing patch is attached, the temperature change at the simulated fire - starting position, and the temperature change at different heights from bottom to top inside the test chamber; the simulated fire - starting device includes a short - circuit simulated fire - starting mechanism for simulating short - circuit fires of electrical equipment and communication equipment, and an open - flame simulated component for simulating open flames.

[0014] Preferably, the short - circuit simulated fire - starting mechanism includes a cylindrical electrode pair arranged horizontally and coaxially and respectively disposed on a rotating support frame rotating around a common rotating shaft, a spacing adjustment assembly for controlling the movement between the opposite ends of the two electrodes, an electrical connection assembly connecting the two electrodes, and a combustible material located on one side of the two electrodes. The spacing adjustment assembly controls the two electrodes to rotate in opposite directions and synchronously and reciprocally around the common rotating shaft, and controls the two electrodes to approach or separate along the axial direction of the common rotating shaft.

[0015] Preferably, the spacing adjustment assembly includes a base arranged in the test chamber, two rotating disks arranged in parallel and with axes parallel to the top end face of the base, a rotating member arranged on the base for driving the two rotating disks to rotate synchronously and reciprocally in opposite directions around their axes, and a control member arranged on the base for controlling the two rotating disks to move closer or farther away from each other along the axial direction. The two electrodes are respectively detachably mounted on the opposite end faces of the two rotating disks, and the mounting positions deviate from the centers of the disks.

[0016] Preferably, the rotating member includes a plurality of limiting rods arranged vertically in a circumferential array on the opposite end faces of the two rotating disks, two limiting disks symmetrically arranged on the opposite sides of the two rotating disks and respectively sleeved on the plurality of limiting rods in a sliding manner, a limiting ring rotatably sleeved on the outer ring of the limiting disk through an inner ring and fixedly arranged on the base, a fixing ring fixedly arranged at the ends of the plurality of limiting rods far from the rotating disks, and a rotating structure arranged on the base for controlling the rotation of the limiting disk.

[0017] Preferably, the control member includes a linkage ring rotatably arranged on the end face of the fixing ring far from the limiting rods around the axis direction, a transmission rod fixedly arranged on the outer ring surface of the bottom of the linkage ring, and a control structure arranged on the base for driving the two transmission rods to move synchronously towards or away from each other.

[0018] Preferably, the short - circuit simulation fire - starting mechanism further includes a high - temperature simulation component. The high - temperature simulation component includes a heating element that simulates the overheating of the circuit due to overload. On one side of the heating element, there is a combustible material for ignition.

[0019] Preferably, the electrode includes a fixed ring with internal threads on the inner ring, a water - cooled shaft whose one end is thread - connected and inserted into the inner ring of the fixed ring, an electrode head detachably installed on the opening at the far end of the central water inlet channel from the fixed ring, and a liquid - cooling component that controls the circulation of liquid - cooled water through the central water inlet channel and the circumferential drainage groove. The end of the water - cooled shaft is axially provided with a central water inlet channel and a circumferential drainage groove, and through - holes communicating with the inside of the central water inlet channel are provided on the bottom wall of the circumferential drainage groove.

[0020] Preferably, the exhaust component includes an exhaust part arranged on the top of the test chamber and controlling the air flow to scour the inside of the test chamber. The exhaust part discharges the vaporized perfluorocyclohexanone in the test chamber through the scouring of the air flow.

[0021] Preferably, the test mechanism further includes a sealing component that controls the closed state of the internal space of the test chamber. The sealing component includes a sealing adjustment part arranged inside the opening of the test chamber, and the sealing adjustment part is used to adjust the degree of closure of the opening.

[0022] Preferably, the sealing adjustment part includes a sealing disk fixedly arranged in the opening, an adjustment disk fitted on the end face of the sealing disk, a control column fixedly arranged at the center of the end of the adjustment disk away from the sealing disk, a telescopic rod passing through the rotation hole opened at the center of the adjustment disk and connecting the center of the sealing disk and the control column at both ends, and a positioning spring sleeved on the rod body of the telescopic rod and connecting the center of the sealing disk and the control column at both ends. A plurality of connection ports are arranged in a circumferential array on the end faces of the sealing disk and the adjustment disk.

[0023] The beneficial effects of the present invention: Through the short - circuit simulation fire - starting mechanism and the open - flame simulation component, accurate simulation of various types of fire sources such as short - circuit sparks and continuous open flames of electrical equipment is realized. Combined with the synchronous monitoring of high - precision temperature sensors and high - speed cameras, the dynamic release of the fire - extinguishing agent and the flame suppression process can be comprehensively recorded. At the same time, the equipped controllable exhaust component effectively removes the residual fire - extinguishing agent after the test, ensuring the accuracy and repeatability of multiple test data, thereby providing a scientific and reliable test method for the performance evaluation and optimization of the perfluorocyclohexanone fire - extinguishing patch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0025] Figure 1 It is a schematic diagram of the simple structure of the test device for the fire - extinguishing effect of the perfluorocyclohexanone fire - extinguishing patch proposed by the present invention.

[0026] Figure 2 The figure is a schematic structural diagram of the unfolding structure of the perfluoroketone fire extinguishing patch fire extinguishing effect test device proposed by the present invention.

[0027] Figure 3 The figure is a schematic structural diagram of the short-circuit simulation ignition mechanism of the present invention.

[0028] Figure 4 The figure is a schematic structural diagram of the simulated ignition device of the present invention.

[0029] Figure 5 The figure is a schematic structural diagram of the rotating part and the control part of the present invention.

[0030] Figure 6 The figure is a schematic structural diagram of the control of the movement of the electrode pair by the rotating part and the control part of the present invention.

[0031] Figure 7 The figure is a schematic structural diagram of the electrode unfolding structure of the present invention.

[0032] Figure 8 The figure is a schematic structural diagram of the first lifting part of the present invention.

[0033] Figure 9 The figure is a schematic structural diagram of the closing component of the present invention.

[0034] In the figure: 1, test box; 2, box door; 3, heat dissipation hole; 4, exhaust hole; 5, exhaust fan; 6, test slot; 7, lifting slot; 8, lifting rod; 9, lifting block; 10, connecting block; 11, clamping block; 12, control block; 13, base; 14, rotating disk; 15, water-cooled shaft; 16, electrode head; 17, limiting ring; 18, limiting disk; 19, linkage ring; 20, rotating toothed ring; 21, limiting rod; 22, connecting pipe; 23, fixing ring; 24, central water inlet channel; 25, circumferential drainage groove; 26, through hole; 27, connecting column; 28, adjusting slot; 29, test block; 30, plug-in block; 31, plug-in slot; 32, inserting block; 33, adjusting screw rod; 34, adjusting block; 35, adjusting disk; 36, sealing disk; 37, control column; 38, rotating hole; 39, telescopic rod; 40, positioning spring; 41, insulating plate; 42, rotating rack; 43, linkage rack; 44, linkage gear; 45, transmission rod; 46, control slot; 47, bidirectional screw rod; 48, control block; 49, guiding strip. Detailed implementation manners

[0035] In order to make the technical means, creative features, achieved objectives and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0036] The perfluoromethyl hexanone fire extinguishing patch is a new type of fire extinguishing device. Using the perfluoromethyl hexanone fire extinguishing patch is very simple. Just tear open the seal and directly attach it to the fire source. Once the fire source contacts the fire extinguishing patch, the perfluoromethyl hexanone fire extinguishing agent in the patch will be quickly released. It can react with the free radicals in the combustion reaction, reduce their activity and consume the free radicals, thereby inhibiting the continuous progress of the combustion chain reaction. In addition, perfluoromethyl hexanone can also absorb a large amount of heat, reduce the temperature of the fire scene, and further prevent the spread of the fire.

[0037] The process of testing the fire extinguishing effect of the perfluoromethyl hexanone fire extinguishing patch in the prior art is as follows:

[0038] Attach the perfluoromethyl hexanone fire extinguishing patch to the upper part or the inner side of the box body. Use tools such as an igniter or a match to ignite the combustibles placed inside the box body and ensure that the flame can continue to burn. Record the ignition time, then quickly close the box door to ensure that a relatively closed environment is formed inside the box body. Observe the fire extinguishing situation in real time through the transparent observation panel, and record key data such as the change of the flame, the reaction of the fire extinguishing patch and the fire extinguishing time. After the flame goes out, wait for a period of time to ensure that the temperature inside the box body drops to the safe range, re-ignite the flame, and repeat the above test process to verify the repeatability and stability of the fire extinguishing patch.

[0039] In the process of testing the perfluoromethyl hexanone fire extinguishing patch with the existing test device, the following problems exist:

[0040] 1. The perfluoromethyl hexanone fire extinguishing patch is often applied inside electrical equipment. The causes of electrical equipment fires are various, mainly including overheating of internal wires due to overload, a large amount of heat generated by short-circuit arcs, leakage arcs, and equipment aging and damage. These situations will cause the internal combustibles (such as wire insulation layers, surrounding plastics, etc.) to burn, thus triggering a fire. Therefore, only testing the fire extinguishing effect through an open flame cannot comprehensively and accurately simulate the actual fire situation inside electrical equipment, and thus cannot obtain an accurate evaluation of the fire extinguishing effect.

[0041] 2. In the existing test, when the flame goes out for the last time, the tester will open the box door to re-ignite the combustibles for repeated testing. However, in this process, the perfluoromethyl hexanone vaporized inside the box body is not effectively removed. The remaining perfluoromethyl hexanone may affect the subsequent test environment, thus interfering with the results of the repeated test and making the test results less accurate and reliable.

[0042] Therefore, in view of the above problems, it is necessary to improve and optimize the existing test devices and methods to ensure that the fire extinguishing effect of perfluorohexanone fire extinguishing patches in electrical equipment fires can be evaluated more accurately. The present invention proposes a test device for the fire extinguishing effect of perfluorohexanone fire extinguishing patches.

[0043] Example 1

[0044] A test device for the fire extinguishing effect of perfluorohexanone fire extinguishing patches, as Figures 1-3 shown, includes a test chamber 1 and a test mechanism disposed inside the test chamber 1. The test mechanism includes a plurality of temperature sensors disposed inside the test chamber 1, a simulated fire starting device, a high-speed camera for collecting image data of the simulated fire starting position, and an exhaust assembly for discharging the vaporized perfluorohexanone inside the test chamber 1;

[0045] The plurality of temperature sensors are respectively used to collect the temperature change at the position where the perfluorohexanone fire extinguishing patch is attached, the temperature change at the simulated fire starting position, and the temperature change at different heights from bottom to top inside the test chamber 1;

[0046] The high-speed camera is used to capture the image data of the simulated fire starting position, record the development of the fire, the fire extinguishing process and the flame extinguishing situation, and provide intuitive visual materials for subsequent analysis;

[0047] The simulated fire starting device includes a short-circuit simulated fire starting mechanism for simulating short-circuit fires of electrical equipment and communication equipment, and an open-fire simulated component for simulating open fire.

[0048] In this embodiment, through the fire source system of the short-circuit simulated fire starting mechanism and the open-fire simulated component, combined with the temperature sensors and the high-speed camera, the performance test and evaluation of the perfluorohexanone fire extinguishing patch in the actual application scenario are realized. By precisely reproducing the typical short-circuit fault characteristics of electrical equipment through the adjustable short-circuit simulation mechanism, the industry problem that traditional tests cannot simulate transient electric sparks is solved. At the same time, a multi-temperature sensor monitoring strategy is adopted to synchronously collect the vaporization temperature field on the surface of the perfluorohexanone fire extinguishing patch, the temperature gradient in the flame core area, and the ambient temperature rise curve, providing multi-parameter criteria for quantifying the fire extinguishing efficiency; an exhaust system with active airflow management is equipped, and the airflow is controlled through the exhaust assembly to comprehensively and quickly remove the residual vaporized perfluorohexanone inside the test chamber 1, ensuring the consistency of the continuous test conditions.

[0049] In this embodiment, the multi-temperature sensor monitoring includes the following three parts:

[0050] 1. Monitoring of the vaporization temperature field on the surface of the perfluorohexanone fire extinguishing patch

[0051] A number of temperature sensors are arranged at the attachment point of the perfluorhexanone fire extinguishing patch to monitor the temperature changes during its vaporization process in real time. These data reflect the speed at which the perfluorhexanone fire extinguishing patch responds to a fire and the rate of vaporization and release of perfluorhexanone. The distribution of the vaporization temperature field helps to understand the working effect of the fire extinguishing patch in different areas.

[0052] 2. Monitoring of the temperature gradient in the flame core area

[0053] Temperature sensors are arranged in the flame core area of the simulated fire - starting device to measure the temperature gradient of the flame. The temperature gradient reflects the intensity and spread speed of the flame, which is an important indicator for evaluating the fire - extinguishing effect. By monitoring the temperature changes in the flame core area, the inhibitory effect of the perfluorhexanone fire extinguishing patch on the flame when triggered can be intuitively understood.

[0054] 3. Monitoring of the ambient temperature rise curve

[0055] A number of temperature sensors are arranged at equal intervals in the vertical direction on the tank wall of the test chamber 1 to record the ambient temperature rise curve during the whole test process. The ambient temperature rise curve reflects the impact of perfluorhexanone vaporization on the ambient temperature and the heat dissipation during the fire - extinguishing process. By analyzing the ambient temperature rise curve, the protective effect of the fire - extinguishing patch on the surrounding environment can be evaluated.

[0056] In this embodiment, with this multi - temperature - sensor monitoring strategy, we can synchronously collect multi - parameter data such as the surface vaporization temperature field of the perfluorhexanone fire extinguishing patch, the temperature gradient in the flame core area, and the ambient temperature rise curve. These data provide a comprehensive criterion for quantifying the fire - extinguishing efficiency, enabling us to more accurately evaluate the performance of the fire - extinguishing patch.

[0057] The high - speed camera plays a crucial role in this embodiment. It is carefully arranged in the test device to capture image data of the simulated fire - starting position. This high - speed camera has the capabilities of high resolution and fast capture frame rate, ensuring accurate recording of every detail in the fire development process.

[0058] At the beginning stage of the test, with the start of the simulated fire - starting device, the flame ignites and spreads rapidly. The high - speed camera captures the initial form, development path, and spread speed of the flame in real time. These image data provide analysis data for subsequent analysis of the cause and development mechanism of the fire.

[0059] During the fire - extinguishing process, the perfluorhexanone fire extinguishing patch is triggered to release perfluorhexanone for fire extinguishing. The high - speed camera closely follows this process and details the vaporization, diffusion, and instantaneous interaction with the flame of the perfluorhexanone fire extinguishing patch. These pictures clearly show the working principle, fire - extinguishing efficiency, and inhibitory effect on the flame of the perfluorhexanone fire extinguishing patch.

[0060] Finally, when the flame gradually extinguishes, the high-speed camera continues to capture and record the scene after the flame extinguishes, including the state of the residue, the change of the ambient temperature, etc. These image data provide intuitive visual materials for evaluating the protection effect of the fire extinguishing patch on the surrounding environment and the on-site recovery situation after extinguishing the fire.

[0061] In summary, by capturing the image data of the simulated fire ignition position, the high-speed camera comprehensively records the development of the fire, the fire extinguishing process and the flame extinguishing situation, providing comprehensive and accurate analysis data for subsequent analysis, research and optimization. It should be noted that this part can be achieved based on the existing technology and is not the core technical point of the present invention. For example, the invention patent CN114870294B discloses a method and system for extinguishing a lithium-ion battery fire based on image recognition, which involves a technical solution of continuously capturing images of a battery module by a high-speed camera and calculating the fire ignition point position, flame area and fire intensity of the fire.

[0062] In the existing technology, although the arc generator can be used to simulate a short-circuit arc, the traditional equipment has obvious limitations. They can only simulate the static short-circuit situation that occurs at a relatively fixed electrode spacing. However, the short-circuit phenomenon in actual equipment is complex and changeable, with various modes, and these modes are affected by various factors such as equipment type, use environment and fault conditions. Therefore, the traditional arc generator cannot comprehensively simulate various short-circuit modes that may occur in existing equipment.

[0063] To overcome this limitation of the existing simulation equipment, this embodiment proposes a new short-circuit simulation ignition mechanism, as Figures 3-6 shown, the short-circuit simulation ignition mechanism includes a cylindrical electrode pair arranged horizontally and coaxially and respectively provided on a rotating support frame around a common rotating shaft, a spacing adjustment component for controlling the movement between the opposite ends of the two electrodes, an electrical connection component connecting the two electrodes, and a combustible material located on one side of the two electrodes. The spacing adjustment component controls the two electrodes to rotate in opposite directions and synchronously reciprocally around the common rotating shaft, and controls the two electrodes to approach or separate along the axial direction of the common rotating shaft.

[0064] In this embodiment, the process of simulating a short - circuit arc is as follows: First, the spacing adjustment component controls two electrodes to rotate in a reverse - synchronous reciprocating manner around a common rotating shaft. This rotation method causes the relative positions between the electrodes to constantly change, thus being able to simulate the changes in the electrode spacing in actual devices due to factors such as vibration and thermal expansion. At the same time, the spacing adjustment component also controls the approaching or separating movement of the two electrodes along the axial direction of the common rotating shaft. When the distance between the electrodes gradually decreases, the electrical connection component ensures that current can smoothly pass through the two electrodes to form an arc. As the distance between the electrodes further decreases, the intensity of the arc gradually increases, simulating the generation and development process of the arc during a short - circuit. When the arc reaches a certain intensity, the heat and sparks generated by it may ignite combustibles located on one side of the electrodes. In this way, not only the generation and development process of the short - circuit arc are simulated, but also the fire situation that may be caused by the short - circuit is further simulated. Therefore, the short - circuit simulation ignition mechanism proposed in this embodiment can flexibly simulate various short - circuit modes that may occur in actual devices, including changes in electrode spacing, the generation and development of the arc, and the fire situation that may be caused by the short - circuit. This provides a powerful experimental means for the fire - extinguishing test of electrical equipment short - circuit faults causing fires.

[0065] The electrical connection component includes components such as a power source, a switch, and a controller, which are used to control the on - off and magnitude of the current, and control the generation and intensity of the arc between the electrode pair.

[0066] In this embodiment, as Figures 3-6 shown, the spacing adjustment component includes a base 13 provided in the test box 1, two rotating disks 14 arranged in parallel and with axes parallel to the top end face of the base 13, a rotating member provided on the base 13 for driving the two rotating disks 14 to rotate synchronously and reciprocally in the reverse direction around their axes, and a control member provided on the base 13 for controlling the two rotating disks 14 to move closer to or away from each other along the axial direction. The two electrodes are respectively detachably mounted on the opposite end faces of the two rotating disks 14, and the mounting positions deviate from the center of the disks. When it is necessary to simulate a short - circuit arc, the rotating member and the control member are started. The rotating member drives the two rotating disks 14 to rotate synchronously and reciprocally in the reverse direction around their axes, controlling the relative movement between the two electrodes, simulating the dynamic change of the electrode spacing in actual devices due to reasons such as vibration and thermal expansion. At the same time, the control member controls the relative or opposite movement between the two rotating disks 14 to adjust the generation conditions and intensity of the arc.

[0067] In order to control the rotation of the two rotating disks, as Figures 3-6As shown in the figure, the rotating member includes multiple limiting rods 21 vertically arranged in a circumferential array on the opposite end faces of the two rotating disks 14, two limiting disks 18 symmetrically arranged on the opposite sides of the two rotating disks 14 and respectively sleeved on the multiple limiting rods 21 in a sliding manner, a limiting ring 17 fixedly arranged on the base 13 by rotating the inner ring on the outer ring of the limiting disk 18, a fixing ring fixedly arranged at the ends of the multiple limiting rods 21 away from the rotating disks 14, and a rotating structure arranged on the base 13 to control the rotation of the limiting disks 18. The rotating structure drives the two limiting disks 18 to rotate in opposite directions synchronously within the inner ring of the limiting ring 17, that is, to rotate around the axis direction of the rotating disks 14. The rotating disks 14 and the limiting disks 18 are connected by the limiting rods 21 to drive the rotating disks 14 to rotate, realizing the adjustment of the distance between the two electrodes, so as to cooperate with the control member and the electrical connection assembly to simulate the short-circuit ignition process.

[0068] As Figure 3 and Figure 7 shown in the figure, the rotating structure includes a rotating toothed ring 20 sleeved on the multiple limiting rods 21 through the inner ring and fixedly connected to the end face of the limiting disk 18, a guiding strip 49 arranged along the length direction perpendicular to the limiting rods 21 and slidably passing through the guiding groove opened at the top end of the base 13, a rotating rack 42 fixedly arranged on the guiding strip and meshing with the rotating toothed ring 20, two linking racks 43 fixedly arranged on the opposite side faces of the two rotating racks 42, and a linking gear 44 rotatably arranged between the two linking racks 43 and meshing with the two linking racks 43 driven by a motor. By driving the linking gear 44 to rotate, under the limiting action that the guiding strip 49 slidably passes through the guiding groove, the moving directions of the two linking racks 43 are limited, so that the two linking racks 43 can be driven to move in opposite directions along their respective length directions on the base 13, and under the meshing action of the linking racks 43 and the rotating toothed ring 20, the two rotating toothed rings 20 are driven to rotate in opposite directions synchronously, realizing the synchronous reverse driving of the two rotating disks 14 to rotate the electrode pair ( Figure 6 is the state diagram during the rotation of the rotating disk 14), so as to facilitate the adjustment of the relative distance between the electrode pairs.

[0069] As Figure 6 shown in the figure, the control member includes a linking ring 19 rotatably arranged around the axis direction on the end face of the fixing ring away from the limiting rod 21, a transmission rod 45 fixedly arranged on the outer ring surface at the bottom of the linking ring 19, and a control structure arranged on the base 13 to drive the two transmission rods 45 to move synchronously towards or away from each other;

[0070] The control structure includes a bidirectional lead screw 47 driven by a motor and axially passing through a control groove 46 opened at the top end of the base 13 along the rotating disc 14, two control blocks 48 respectively sleeved on the rod bodies at both ends of the bidirectional lead screw 47 through threaded connection sleeves, and two connecting rods axially movably penetrating through the base 13 along the rotating disc 14 and respectively connecting adjacent transmission rods 45 and control blocks 48.

[0071] In this embodiment, the motor drives the bidirectional lead screw 47 to rotate. The rotation of the bidirectional lead screw 47 causes the two control blocks 48 to move towards or away from each other along the axial direction of the lead screw. The movement of the control blocks 48 is transmitted to the transmission rod 45 through the connecting rod. The transmission rod 45 drives the linkage ring 19 to move axially, controlling the mutual approach or separation between the two rotating discs 14, and realizing the adjustment of the distance between the electrode pairs.

[0072] Through the cooperation of the control member and the rotating member, controlling the "axial movement and synchronous reverse rotation" between the electrode pairs realizes the simulation of the three-dimensional spiral arc trajectory (reproducing the arc throwing phenomenon caused by wire breakage), the change of the dynamic contact resistance (simulating the intermittent discharge caused by joint loosening), and the visualization of the electrode ablation process (rotation makes the ablation surface evenly exposed).

[0073] In this embodiment, the short-circuit simulation ignition mechanism further includes a high-temperature simulation component. The high-temperature simulation component includes a heating member for simulating the overheating of the circuit. A combustible for ignition is arranged on one side of the heating member. The heating member can adopt a gradient heating ceramic module to simulate the heating state of the circuit (the adjustable temperature range is 50 - 300 °C).

[0074] As Figure 3 and Figure 7 shown, the electrode includes a fixed ring 23 with internal threads opened on the inner ring, a water-cooled shaft 15 whose one end is threadedly connected and passes through the inner ring of the fixed ring 23, an electrode head 16 detachably installed on the opening at the far end of the central water inlet channel 24 away from the fixed ring 23, and a liquid cooling member for controlling the liquid cooling water to circulate through the central water inlet channel 24 and the circumferential drainage groove 25. The end of the water-cooled shaft 15 is axially provided with a central water inlet channel 24 and a circumferential drainage groove 25, and a through hole 26 communicating with the inside of the central water inlet channel 24 is opened on the bottom wall of the circumferential drainage groove 25. One end of the fixed ring 23 is fixedly arranged on the opposite end face of the rotating disc 14, and the water-cooled shaft 15 is threadedly connected and installed in the fixed ring 23. When the liquid cooling member controls the coolant to be injected into the central water inlet channel 24 through one of the two pipes in the connecting pipe 22 and enters the circumferential drainage groove 25 through the through hole 26, it cools the electrode head 16 installed on the end of the water-cooled shaft 15 through the connecting column 27, reduces the thermal stress and thermal fatigue of the electrode material, prolongs the service life of the electrode, and ensures that the electrode maintains stable performance in continuous multiple short-circuit tests, reducing the test interruption and re-preparation time caused by overheating of the electrode.

[0075] In this embodiment, as Figures 1-2 shown, the exhaust assembly includes an exhaust member disposed on the top of the test chamber 1 and controlling the air flow to scour the interior of the test chamber 1. The exhaust member discharges the vaporized perfluorohexanone in the test chamber 1 through the scouring of the air flow. The exhaust member adopts an exhaust fan 5 disposed at the top of the test chamber 1 and having an exhaust hole 4 communicating with the interior of the test chamber 1. When it is necessary to repeatedly conduct a fire extinguishing test on the perfluorohexanone fire extinguishing patch, the door 2 is opened. At this time, the motor drives the exhaust fan 5 to work, controlling the air flow to scour the interior of the test chamber 1 along the vertical direction through the exhaust hole 4, facilitating the removal of the residual vaporized perfluorohexanone in the test chamber 1 and avoiding the influence of the residual vaporized perfluorohexanone on the subsequent fire extinguishing test of the fire extinguishing patch.

[0076] Embodiment 2

[0077] In view of the heat dissipation openings provided on the side of the electrical equipment and the relatively closed equipment housing in the prior art, the present invention proposes a new closing assembly for adjusting the closed state of the internal space of the test chamber 1. The closing assembly is designed to flexibly adjust the degree of closure of the interior of the test chamber 1 according to the test requirements, so as to optimize the test environment, improve the test accuracy and equipment adaptability.

[0078] As Figures 1-2 and Figure 9 shown, in this embodiment, the test mechanism further includes a closing assembly for controlling the closed state of the internal space of the test chamber 1. The closing assembly includes a closing adjustment member disposed in the opening provided on the test chamber 1. The closing adjustment member is used to adjust the degree of closure of the opening. The closing adjustment member includes a sealing disk 36 fixedly disposed in the opening, an adjustment disk 35 fitted on the end face of the sealing disk 36, a control column 37 fixedly disposed on the center of the end of the adjustment disk 35 away from the sealing disk 36, a telescopic rod 39 passing through a rotation hole 38 provided at the center of the adjustment disk 35 and having two ends respectively connected to the center of the sealing disk 36 and the control column 37, and a positioning spring 40 sleeved on the rod body of the telescopic rod 39 and having two ends respectively connected to the center of the sealing disk 36 and the control column 37. A plurality of connection ports are circumferentially and arrayedly provided on the end faces of the sealing disk 36 and the adjustment disk 35.

[0079] The process of adjusting the closed state of the internal space of the test chamber 1 is as follows:

[0080] 1. Initial state:

[0081] The sealing disk 36 of the closing assembly is fixedly installed at the opening of the test chamber 1 to form an initial closed state; the adjustment disk 35 is fitted on the end face of the sealing disk 36, and the telescopic rod 39 and the positioning spring 40 are in an initial state.

[0082] 2. Adjusting the closed state:

[0083] The control post 37 is controlled by an external operation to drive the telescopic rod 39 to expand and contract within the rotation hole 38. The expansion and contraction movement of the telescopic rod 39 pushes the adjustment disk 35 to move relative to the sealing disk 36, and the control post 37 is rotated to adjust the size of the opening that penetrates through the connection ports opened on the adjustment disk 35 and the sealing disk 36. After the adjustment is completed, the control post 37 is released, and under the pulling force of the positioning spring 40, the adjustment disk 35 will be driven to fit on the sealing disk 36, ensuring the relative fixation of the positions between the adjustment disk 35 and the sealing disk 36, which is convenient for adjusting the size of the opening; the positioning spring 40 provides elastic support to ensure that the adjustment disk 35 can move smoothly and stay at the required position.

[0084] By adjusting the size of the overlapping opening of the connection port, the tightness inside the test chamber 1 can be adjusted, so as to simulate the internal closed state and semi-closed state of existing electrical equipment.

[0085] The sealing assembly can also be arranged in the heat dissipation hole 3 opened on the side of the test chamber 1.

[0086] Embodiment 3

[0087] As Figure 2 and Figure 8 As shown, a first lifting member is still arranged inside the test chamber 1. The lifting member includes an adjustment screw rod 33 driven by a motor and arranged vertically in the adjustment groove 28 opened on the groove wall of the test chamber 1, an adjustment block 34 sleeved on the adjustment screw rod 33 through a threaded connection sleeve, a plug-in block 30 arranged inside the test chamber 1 and connected to the adjustment block 34, and a plug 32 arranged on the test block 29 and capable of passing through the plug-in groove 31 opened on the plug-in block 30.

[0088] The perfluorinated hexanone fire extinguishing patch is directly pasted on the test block 29. The test block 29 passes through the plug 32 and is inserted into the plug-in groove 31, which is convenient for disassembling the test block 29 inside the test chamber 1. This design improves the installation and disassembly efficiency of the perfluorinated hexanone fire extinguishing patch. The perfluorinated hexanone fire extinguishing patch is pasted on the test block 29, and the motor is used to drive the adjustment screw rod 33 to rotate to drive the adjustment block to lift in the adjustment groove 28, which is convenient for adjusting the height of the perfluorinated hexanone fire extinguishing patch inside the test chamber 1.

[0089] A plug-in block 30 is also arranged on the top of the test chamber 1 to install the perfluorinated hexanone fire extinguishing patch at the top position of the test chamber 1. By changing the pasting position of the perfluorinated hexanone fire extinguishing patch, the fire extinguishing effect of the perfluorinated hexanone fire extinguishing patch at different installation positions can be conveniently tested.

[0090] As Figures 2-5As shown, the testing mechanism further includes a second lifting member disposed in a testing slot 6 opened in a testing box 1. The second lifting member includes a lifting lead screw vertically disposed in a lifting slot 7 opened in the slot wall of the testing slot 6, a control block 12 sleeved on the lead screw of the lifting lead screw through a threaded connection sleeve, a lifting rod 8 horizontally disposed in the testing slot 6 and fixedly connected to the control block 12 at one end, a lifting block 9 fixedly disposed at the end of the lifting rod 8 away from the control block 12, and a connecting block 10 that can be disposed on the lifting block 9 and has a clamping block 11 at the bottom. The clamping block 11 can penetrate through a clamping slot opened at the top of the lifting block 9 and matching the clamping block 11.

[0091] A connecting block 10 is disposed at the bottom of the base 13. By passing the clamping block 11 through the clamping slot, the simulated fire starting device is installed in the lifting block 9. By driving the lifting lead screw to rotate through a motor, the lifting threaded block is driven to lift, thereby controlling the simulated fire starting device to perform a lifting motion in the testing slot 6.

[0092] The open fire simulation assembly includes a control slot 46 disposed on another connecting block 10. Combustibles, such as gasoline, wood, etc., can be placed in the control slot 46. By igniting the combustibles in the control slot 46, the fire extinguishing effect of Novec 1230 on extinguishing the open fire is directly simulated for testing.

[0093] As Figures 3-4 shown, an insulating plate 41 is horizontally disposed on the base 13 at a position below the rotating disk 14. By providing the insulating plate 41, the charged components and circuits (such as the motor disposed in the base 13) existing below the rotating disk 14 can be effectively isolated, preventing the current from flowing through an unexpected path and ensuring the safe operation of the electrical equipment.

[0094] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A testing device for the fire extinguishing effect of a perfluoromethyl isopropyl ketone fire extinguishing patch, comprising a testing box (1) and a testing mechanism arranged in the testing box (1), characterized in that, The test mechanism includes multiple temperature sensors, a simulated fire - starting device, a high - speed camera for collecting image data of the simulated fire - starting position, and an exhaust assembly for discharging vaporized perfluoromethylcyclohexanone in the test chamber (1) arranged inside the test chamber (1). The multiple temperature sensors are respectively used for collecting the temperature changes at the positions where the perfluoromethylcyclohexanone fire - extinguishing patches are attached, the temperature changes at the simulated fire - starting positions, and the temperature changes at different heights from bottom to top inside the test chamber (1). The simulated fire - starting device includes a short - circuit simulated fire - starting mechanism for simulating short - circuit fires of electrical equipment and communication equipment, and an open - fire simulated component for simulating open fires.

2. The fire extinguishing effect test device for a perfluoroketone fire extinguishing patch according to claim 1, characterized in that: The short - circuit simulated fire - starting mechanism includes a pair of cylindrical electrodes arranged horizontally and coaxially and respectively set on a rotating support frame rotating around a common rotating shaft, a spacing adjustment component for controlling the movement between the opposite ends of the two electrodes, an electrical connection component connecting the two electrodes, and a combustible placed on one side of the two electrodes. The spacing adjustment component controls the two electrodes to rotate in opposite directions and synchronously and reciprocally around the common rotating shaft, and controls the two electrodes to approach or separate along the axial direction of the common rotating shaft.

3. A perfluoroketone fire extinguishing patch fire extinguishing effect test device according to claim 2, characterized in that: The spacing adjustment component includes a base (13) arranged inside the test chamber (1), two rotating disks (14) arranged in parallel and with their axes parallel to the top end face of the base (13), a rotating member arranged on the base (13) for driving the two rotating disks (14) to rotate synchronously and reciprocally in opposite directions around their axes, and a control member arranged on the base (13) for controlling the two rotating disks (14) to move closer or farther away from each other along the axial direction. The two electrodes are respectively detachably installed on the opposite end faces of the two rotating disks (14), and the installation positions deviate from the centers of the disks.

4. A perfluoroketone fire extinguishing patch fire extinguishing effect test device according to claim 3, characterized in that: The rotating member includes multiple limiting rods (21) arranged vertically in a circumferential array on the opposite end faces of the two rotating disks (14), two limiting disks (18) symmetrically arranged on the opposite sides of the two rotating disks (14) and respectively sleeved on the multiple limiting rods (21) in a sliding manner, a limiting ring (17) fixedly arranged on the base (13) by rotating and sleeving on the outer ring of the limiting disk (18) through an inner ring, a fixing ring fixedly arranged at the ends of the multiple limiting rods (21) far from the rotating disks (14), and a rotating structure arranged on the base (13) for controlling the rotation of the limiting disk (18).

5. The fire extinguishing effect test device for a perfluoroketone fire extinguishing patch according to claim 4, wherein: The control member includes a linkage ring (19) rotatably arranged around the axis direction on the end face of the fixing ring far from the limiting rod (21), a transmission rod (45) fixedly arranged on the outer circumferential surface of the bottom of the linkage ring (19), and a control structure arranged on the base (13) for driving the two transmission rods (45) to move synchronously towards or away from each other.

6. A perfluoroketone fire extinguishing patch fire extinguishing effect test device according to claim 1 or 2, characterized in that: The short - circuit simulated fire - starting mechanism further includes a high - temperature simulation component. The high - temperature simulation component includes a heating element for simulating over - heating of a circuit. A combustible for ignition is arranged on one side of the heating element.

7. The fire extinguishing effect test device for a perfluoroketone fire extinguishing patch according to claim 2, characterized in that: The electrode includes a fixing ring (23) with an internal thread provided on the inner ring, a water-cooled shaft (15) whose one end is threadedly connected and inserted into the inner ring of the fixing ring (23), an electrode head (16) detachably installed on the opening at the end of the central water inlet passage (24) away from the fixing ring (23), and a liquid cooling member for controlling the liquid cooling water flow to circulate through the central water inlet passage (24) and the circumferential drainage groove (25). The end of the water-cooled shaft (15) is axially provided with a central water inlet passage (24) and a circumferential drainage groove (25), and a through hole (26) communicating with the inside of the central water inlet passage (24) is provided on the bottom wall of the circumferential drainage groove (25).

8. The fire extinguishing effect test device for a perfluoroketone fire extinguishing patch according to claim 1, characterized in that: The exhaust assembly includes an exhaust member provided on the top of the test chamber (1) and controlling the air flow to scour the inside of the test chamber (1). The exhaust member discharges the vaporized perfluorocyclohexanone in the test chamber (1) by scouring with the air flow.

9. The fire extinguishing effect test device for a perfluoroketone fire extinguishing patch according to claim 1, characterized in that: The test mechanism further includes a closing assembly for controlling the closed state of the internal space of the test chamber (1). The closing assembly includes a closing adjustment member provided inside the opening of the test chamber (1), and the closing adjustment member is used to adjust the closing degree of the opening.

10. A perfluoroketone fire extinguishing patch fire extinguishing effect testing device according to claim 9, characterized in that: The closing adjustment member includes a sealing disc (36) fixedly provided in the opening, an adjustment disc (35) fitted on the end face of the sealing disc (36), a control column (37) fixedly provided on the center of the end of the adjustment disc (35) away from the sealing disc (36), a telescopic rod (39) passing through the rotation hole (38) provided at the center of the adjustment disc (35) and having two ends respectively connected to the center of the sealing disc (36) and the control column (37), and a positioning spring (40) sleeved on the rod body of the telescopic rod (39) and having two ends respectively connected to the center of the sealing disc (36) and the control column (37). A plurality of connection ports are arranged in a circumferential array on the end faces of the sealing disc (36) and the adjustment disc (35).

Images