Weighing platform suitable for calorimetric test of combustible and test system

Abstract

The utility model provides a weighing platform and a test system suitable for a calorimetric test of combustible materials, and relates to the field of calorimetric tests of combustible materials, the weighing platform suitable for the calorimetric test of combustible materials comprises a platform main body and a support assembly, and the upper end face of the platform main body is provided with a placing groove used for placing a combustor. The supporting assembly comprises a first pressure sensor, and the first pressure sensor is connected with the platform body and used for weighing. The placing groove is formed in the platform main body, the sample is placed on the plane of the platform main body, and the combustor is placed in the placing groove, so that scenes in which a fire source and an ignition object are located at different heights are simulated, the position relation between the fire source and the ignition object in an actual fire scene can be restored more truly, and the accuracy of test data is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of calorimetric testing of combustibles, specifically relating to a weighing platform and testing system suitable for calorimetric testing of combustibles. Background Technology

[0002] Calorimetric testing of combustible materials is a crucial method for scientifically assessing the flammability of materials or articles. Its core lies in igniting combustible materials and accurately measuring the heat release during combustion. This process not only helps researchers gain a deeper understanding of the combustion characteristics of materials but is also an indispensable research tool in the field of fire safety, playing a significant role in fire prevention and mitigation. In calorimetric testing of combustible materials, calorimetric analysis is a key step. It assesses the intensity and potential hazards of combustion by quantitatively measuring the heat generated during combustion. Mass loss during combustion is also an important indicator for evaluating the combustion performance of an object, especially crucial in studying the morphological changes caused by combustion (such as melting and thermal shrinkage) and in the collapse of system structures. When conducting calorimetric tests on combustible materials, the burner and the combustible sample are placed at specific positions on a weighing platform to simulate the positional relationship between the ignition source and the igniter in a fire. A specially designed high-temperature resistant chamber contains the flammable material, which serves as the burner to simulate the ignition of the combustible sample. The weighing platform is placed inside the calorimetric chamber, allowing for real-time monitoring of the combustion state of the combustible sample. Simultaneously, the weighing platform measures the mass loss of the combustible sample during combustion. The height of the top of the calorimetric chamber relative to the combustible sample is defined as the effective calorimetric height; different effective calorimetric heights are required for combustible samples with different properties.

[0003] In real fire scenarios, the fire source and the ignition material may be at different heights. However, when using a traditional weighing platform for testing, the burner and the sample to be ignited can only be placed at the same height, making it impossible to study the combustion state when the sample and the burner are at different heights. Utility Model Content

[0004] The present invention aims to provide a weighing platform and testing system suitable for calorimetric testing of combustible materials, in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a weighing platform suitable for calorimetric testing of combustible materials, used to monitor the mass change of the combustible material, wherein the weighing platform suitable for calorimetric testing of combustible materials includes:

[0006] The platform body has a slot on the upper surface for placing the burner;

[0007] The support assembly includes a first pressure sensor connected to the platform body for weighing.

[0008] In this embodiment of the application, a placement slot is provided on the platform body, the sample is placed on the plane of the platform body, and the burner is placed in the placement slot, thereby simulating the scenario where the fire source and the ignition material are at different heights. This can more realistically restore the positional relationship between the fire source and the ignition material in the actual fire scenario and ensure the accuracy of the test data.

[0009] In one embodiment, it further includes:

[0010] A pad is used to be placed on the bottom wall of the placement slot.

[0011] In this embodiment of the application, by setting a pad at the bottom of the placement slot and changing the depth of the placement slot, the height of the burner can be adjusted, thereby simulating different fire source heights and enhancing the versatility of the weighing platform.

[0012] In one embodiment, it further includes:

[0013] A cover plate is used to open and close the opening of the placement slot.

[0014] In this embodiment of the application, when it is necessary to collect test data when the burner and the sample are at the same height, a cover plate can be added to the placement slot to ensure that the upper surface of the platform body can form a complete plane. When it is necessary to collect test data when the burner and the sample are at different heights, the cover plate can be removed, and the burner can be placed in the placement slot to form a height difference with the sample. By removing and placing the cover plate, the two test modes can be quickly switched, which enhances the versatility and convenience of the weighing platform.

[0015] In one embodiment, there are four support components arranged circumferentially along the platform body, and the four support components are connected to form a rectangle.

[0016] In this embodiment, based on the centroid calculation formula, the mass and centroid position of the sample can be calculated using data collected from the four support components, and the changes in the centroid position of the sample during combustion can be monitored in real time to analyze the specific combustion patterns.

[0017] In one embodiment, the support component further includes:

[0018] A first screw is vertically installed and passes through the platform body. The first screw is threadedly assembled with the platform body to adjust the height of the platform body. The bottom of the first screw is connected to the first pressure sensor.

[0019] In this embodiment, the first screw is threadedly engaged with the platform body, allowing the height of the platform body to be adjusted according to the calorific value of the flammable sample, thus further improving the versatility of the weighing platform.

[0020] In one embodiment, the support component further includes:

[0021] A second screw is vertically arranged and passes through the platform body, and the second screw is threadedly assembled with the platform body; and

[0022] A second pressure sensor is connected to the bottom of the second screw; wherein the first pressure sensor and the second pressure sensor have different measurement ranges.

[0023] In this application embodiment, a scheme for flexibly selecting pressure sensors with different ranges is provided to adapt to the testing requirements of combustibles of various weights, thereby enhancing the versatility of the weighing platform.

[0024] In one embodiment, the support component further includes:

[0025] The third screw is vertically arranged and passes through the platform body, and the third screw is threadedly assembled with the platform body.

[0026] In this embodiment, when the platform does not need to perform weighing operations, the design of directly contacting the ground with a screw without a pressure sensor can be adopted, so that the pressure sensor does not need to be under continuous stress, thereby effectively extending the service life of the pressure sensor.

[0027] In one embodiment, the platform body includes:

[0028] Supporting element, used to set the placement slot; and

[0029] The load-bearing keel is fixed to the bottom of the support member, and the load-bearing keel is provided with multiple horizontal convection holes and multiple vertical convection holes.

[0030] In this embodiment, convection holes are provided in the platform body to carry away a large amount of heat through air convection, thereby reducing the temperature of the platform body. The weighing platform can maintain a stable working state for a long time and will not affect its measurement accuracy or damage the platform structure due to high temperature. At the same time, protecting the platform structure from high temperature damage also improves the durability of the weighing platform and extends its service life.

[0031] In one embodiment, the platform body further includes:

[0032] Fireproof board, laid on the support member;

[0033] The placement groove penetrates the fireproof board upwards.

[0034] This utility model provides a combustible calorimetry testing system, including the weighing platform suitable for combustible calorimetry testing in the above embodiments. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the weighing platform of this utility model applicable to calorimetric testing of combustibles (the combustible sample is hidden in the figure).

[0036] Figure 2 This is a schematic diagram of the main structure of the platform of this utility model;

[0037] Figure 3 This is a schematic diagram of the assembly of the screw of this utility model (the supporting component is hidden in the figure).

[0038] Explanation of reference numerals in the attached figures:

[0039] 10-Platform body; 11-Placement slot; 12-Cover plate; 13-Fireproof board; 14-Supporting component; 15-Load-bearing keel; 151-Vertical convection hole; 152-Horizontal convection hole;

[0040] 20-Burner;

[0041] 30-Support assembly; 31-End; 32-Third screw; 33-Second screw; 34-First screw; 35-Second pressure sensor; 36-First pressure sensor. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] During calorimetric testing of combustible materials, a burner and the combustible sample are placed on the platform. The burner simulates an ignition source to ignite the sample, allowing for the measurement of the mass change of the combustible sample during combustion. For effective monitoring, the weighing platform is equipped with a specially designed calorimetric hood to cover the combustible material. The distance from the combustible sample to the top of the calorimetric hood is defined as the effective calorimetric height, and different effective calorimetric heights are required for combustible samples with different properties. However, existing weighing platforms have several drawbacks. First, the burner can only be placed on the same plane as the combustible sample, failing to simulate scenarios where the fire source and combustible material are not at the same height. Second, the height of the weighing platform is fixed, making it impossible to adjust the effective calorimetric height according to the characteristics of the combustible sample, resulting in poor versatility. Third, the weighing platform has a limited range, unable to simultaneously meet the measurement needs of both large and small samples. Fourth, traditional weighing platforms can only calculate the overall mass loss, failing to monitor changes in the center of mass, thus overlooking crucial information in certain experimental scenarios. Fifth, the weighing platform lacks an effective heat dissipation structure design; its measurement accuracy may be affected when operating in high-temperature environments, and prolonged exposure to high temperatures accelerates its aging and shortens its service life. Therefore, to address these issues, a more advanced and adaptable weighing platform needs to be designed to improve the accuracy and reliability of combustible material calorimetric testing.

[0047] To solve the above-mentioned technical problems, this utility model provides a weighing platform suitable for calorimetric testing of combustible materials. Please refer to the appendix for details. Figure 1 To be continued Figure 3 The present invention provides a weighing platform suitable for calorimetric testing of combustible materials, comprising a platform body 10 and a support assembly 30. A placement groove 11 is provided on the upper surface of the platform body 10 for placing a burner 20. The support assembly 30 includes a first pressure sensor 36, which is connected to the platform body 10 for weighing. Before the test, the unloaded mass m0 of the platform body 10 is measured using the first pressure sensor 36. Then, the combustible sample and burner 20 are placed on the platform body 10, and the total mass m1 is measured using the first pressure sensor 36. The initial mass m of the combustible sample and burner 20 is then calculated. 初=m1-m0. After the test begins, the real-time mass m2 of the platform body 10, the combustible sample, and the burner 20 is measured at a certain moment by the first pressure sensor 36, and the total mass m of the combustible sample and the burner 20 at that moment is calculated. 实 =m2-m0, at this moment the mass loss of the flammable sample is m 损 =m 实 -m 初 The mass change of the burner 20 is negligible.

[0048] In this embodiment, a placement slot 11 is provided on the platform body 10, the sample is placed on the plane of the platform body 10, and the burner 20 is placed in the placement slot 11, thereby simulating the scenario where the fire source and the ignition material are at different heights. This can more realistically restore the positional relationship between the fire source and the ignition material in the actual fire scenario and ensure the accuracy of the test data.

[0049] In one embodiment, based on the weighing platform provided in the above embodiment, pads are placed on the bottom wall of the placement slot 11. By changing the number of pads, the height of the burner 20 can be adjusted to simulate different fire source heights and enhance the versatility of the weighing platform.

[0050] In one embodiment, based on the weighing platform provided in the above embodiments, this weighing platform suitable for calorimetric testing of combustibles further includes a cover plate 12 for opening and closing the opening of the placement slot 11. Specifically, the area of ​​the cover plate 12 is larger than the opening area of ​​the placement slot 11, and the cover plate 12 can completely cover the opening of the placement slot 11. When the burner 20 and the sample need to be at the same height, the cover plate 12 is placed on the opening of the placement slot 11, and the burner 20 can be placed on the cover plate 12.

[0051] In this embodiment of the application, when it is necessary to collect test data when the burner 20 and the sample are at the same height, a cover plate 12 can be added to the placement slot 11 to ensure that the upper surface of the platform body 10 can form a complete plane. When it is necessary to collect test data when the burner 20 and the sample are at different heights, the cover plate 12 can be removed, and the burner 20 can be placed in the placement slot 11 to form a height difference with the sample. By removing and placing the cover plate 12, the two test modes can be switched quickly, which enhances the versatility and convenience of the weighing platform.

[0052] In one embodiment, there are four support components 30, which are arranged circumferentially along the platform body 10, and the four support components 30 are connected to form a rectangle.

[0053] In this embodiment of the application, based on the centroid calculation formula, the mass and centroid position of the sample can be calculated using the data collected by the four support components 30, and the changes in the centroid position of the sample during combustion can be monitored in real time to analyze the specific laws of combustion.

[0054] In one embodiment, based on the above embodiment, a first screw 34 is added to the support assembly 30. The first screw 34 is vertically arranged and passes through the platform body 10. The first screw 34 is threadedly assembled with the platform body 10 and is used to adjust the height of the platform body 10. The bottom of the first screw 34 is connected to a first pressure sensor 36. Specifically, the platform body 10 has a through hole corresponding to each first screw 34 for the first screw 34 to pass through. The first screw 34 passes through the through hole at its location and is clearance-fitted with the through hole to ensure that the platform body 10 can slide freely relative to the first screw 34 when adjusting the height. A limiting nut is provided at the bottom of the through hole. The limiting nut is fixedly connected to the platform body 10 and achieves fixed limiting of the first screw 34 through threaded engagement with it.

[0055] In this embodiment, the first screw 34 is threadedly engaged with the platform body 10, and the height of the platform body 10 can be adjusted according to the calorific value requirement of the flammable sample, further improving the versatility of the weighing platform.

[0056] In one embodiment, based on the above embodiment, a second screw 33, a second pressure sensor 35, and a third screw 32 are added to the support assembly 30. The second screw 33 is vertically arranged and passes through the platform body 10, and is threadedly assembled with the platform body 10. The second pressure sensor 35 is connected to the bottom of the second screw 33. The first pressure sensor 36 and the second pressure sensor 35 have different measurement ranges; the first pressure sensor 36 is suitable for measuring small-weight samples, and the second pressure sensor 35 is suitable for measuring large-weight samples. When the sample mass is small, the first screw 34 and the first pressure sensor 36 form a support at the bottom of the platform body 10. When the sample mass is large, the first screw 34 is retracted upwards, and the second screw 33 and the second pressure sensor 35 form a support at the bottom of the platform. Furthermore, the third screw 32 is vertically arranged and passes through the platform body 10, and is threadedly assembled with the platform body 10. When weighing is not required, the first screw 34 and the second screw 33 are retracted, and the third screw 32 is used directly to form a support at the bottom of the platform body 10. The specific installation method of the second screw 33 and the third screw 32 is the same as that of the first screw 34 in the above embodiment, and both are fixed by limiting nuts, so they will not be described in detail here.

[0057] In this application embodiment, a scheme for flexibly selecting pressure sensors with different ranges is provided to adapt to the testing requirements of combustibles of various weights, thereby enhancing the versatility of the weighing platform. When the platform does not need to perform weighing operations, the design of directly contacting the ground with a screw without a pressure sensor installed can be adopted, so that the pressure sensor does not need to be under continuous stress, thereby effectively extending the service life of the pressure sensor.

[0058] In one embodiment, the first screw 34, the second screw 33 and the third screw 32 are provided with end 31 at the top. The end 31 is a prism structure suitable for engaging in a wrench head or tool head, so that the test personnel can rotate the screw using a wrench or power tool.

[0059] In one embodiment, the platform body 10 includes a support member 14 and a load-bearing keel 15 for setting the placement groove 11. The load-bearing keel 15 is fixed to the bottom of the support member 14, and has multiple horizontal convection holes 152 and multiple vertical convection holes 151. Specifically, the horizontal convection holes 152 and vertical convection holes 151 are interleaved to enhance heat dissipation. The support member 14 is a horizontally arranged plate-like structure. Specifically, the load-bearing keel 15 is made of steel. Using a keel structure as a support can reduce the weight of the platform while ensuring structural strength, thereby reducing the measurement error of the sample gravity.

[0060] In this embodiment, convection holes are provided in the platform body 10 to carry away a large amount of heat through air convection, thereby reducing the temperature of the platform body 10. The weighing platform can maintain a stable working state for a long time and will not affect its measurement accuracy or damage the platform structure due to high temperature. At the same time, protecting the platform structure from high temperature damage also improves the durability of the weighing platform and extends its service life.

[0061] In one embodiment, the platform body 10 further includes a fireproof board 13, which is laid on the support member 14 to prevent the support member 14 from being damaged by high temperature. The placement groove 11 penetrates the fireproof board 13 upwards.

[0062] This utility model provides a combustible calorimetry testing system, including the weighing platform for combustible calorimetry testing provided in the above embodiments.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A weighing platform suitable for use in a combustible calorimetry test, characterised in that, The platform body has a placement slot formed in the upper end surface for placing a combustor. The support assembly includes a first pressure sensor connected to the platform body for weighing. The cushion block is placed on the bottom wall of the placement slot. The cover plate is used to open and close the slot of the placement slot.

2. A weighing platform suitable for use in a combustible calorimeter test according to claim 1, characterized in that, The four support assemblies are circumferentially arranged along the platform body, and the connecting lines of the four support assemblies form a rectangle. The support assembly further includes a first screw vertically arranged and penetrating the platform body, and the first screw is threadedly assembled with the platform body for adjusting the height of the platform body, and the bottom of the first screw is connected to the first pressure sensor.

3. A weighing platform suitable for use in a combustible calorimeter test according to claim 1, characterized in that, The support assembly further includes a second screw vertically arranged and penetrating the platform body, and the second screw is threadedly assembled with the platform body, and a second pressure sensor is connected to the bottom of the second screw, wherein the measurement ranges of the first pressure sensor and the second pressure sensor are different. The support assembly further includes a third screw vertically arranged and penetrating the platform body, and the third screw is threadedly assembled with the platform body.

4. The weighing platform suitable for use in a combustible calorimeter test of claim 1, wherein, The platform body includes a support member for arranging the placement slot, and a load-bearing keel fixed at the bottom of the support member, and a plurality of horizontal convection holes and a plurality of vertical convection holes are formed in the load-bearing keel.

5. A weighing platform suitable for use in a combustible calorimeter test according to claim 4, characterized in that, The platform body further includes a fireproof plate laid on the support member, and the placement slot penetrates the fireproof plate upward. The weighing platform for combustible calorimetric test includes any one of claims 1-9.

6. A weighing platform suitable for use in a combustible calorimeter test according to claim 5, characterized in that, ​ ​ ​ 7. A weighing platform suitable for use in a combustible calorimeter test according to claim 6, characterized in that, ​ ​ 8. A weighing platform suitable for use in a combustible calorimeter test according to any one of claims 1 to 7, characterized in that ​ ​ ​ 9. A weighing platform suitable for use in a combustible calorimeter test according to claim 8, characterized in that ​ ​ ​ 10. A combustible calorimetry system, comprising: ​

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