Device for testing vibration durability of barrier explosion suppression material

Abstract

The utility model discloses a device for testing the vibration durability of a barrier explosion suppression material, which comprises a medium container arranged on a vibration test bench, a sealing cover is arranged at the top of the medium container, an exhaust valve, an air inlet valve and a pressure gauge are arranged on the sealing cover, a support is arranged in the medium container, and the pressure gauge is arranged on the support. A grating is arranged on the support, a liquid drainage hole is formed in the position, located below the grating, of the bottom of the medium container, and a liquid drainage pipe is arranged on the liquid drainage hole. And a thermocouple is mounted on one side of the medium container. The device can accurately measure the vibration durability of the barrier explosion suppression materials prepared by different processes, and provides a solid guarantee for qualified production of barrier explosion suppression material products.

Description

Technical Field

[0001] The utility model belongs to the field of testing technology, and in particular relates to a device for testing the vibration durability of barrier explosion suppression materials. Background Art

[0002] The fire prevention and explosion suppression of motor vehicle fuel tanks and oil storage facilities has always been a focus of attention. Filling fuel tanks or oil storage facilities with lightweight, corrosion-resistant, mesh-shaped or spherical porous barrier explosion suppression materials according to certain specifications can effectively prevent and avoid container explosion accidents. The basic principle is that the honeycomb structure composed of mesh in the explosion suppression material stack can divide the inner cavity of the fuel tank or oil storage facility into many "small chambers". These "small chambers" can effectively curb the rapid spread of flames in the event of accidental combustion of the fuel. At the same time, these porous structures have extremely high surface efficiency per unit volume and strong heat absorption capacity. They can quickly absorb most of the heat released by combustion, greatly reducing the final temperature after the combustion reaction and reducing the expansion of the reaction gas, thereby playing a barrier and explosion suppression role.

[0003] Currently, comprehensive evaluation of barrier and explosion suppression materials is primarily based on basic performance, storage compatibility, and barrier and explosion suppression performance. Basic performance indicators include effective volume reduction rate, combustion performance, volume resistivity, and vibration durability. The vibration durability test involves filling a container with liquid fuel with barrier and explosion suppression material and conducting the test according to relevant test methods, such as JT / T1046-2016, "Technical Requirements for Barrier and Explosion-Proof Safety of Road Vehicle Fuel Tanks and Liquid Fuel Transport Tanks." Debris values are measured to determine whether the barrier and explosion suppression material meets the vibration durability requirements. For example, GJB 8455-2015, "General Specification for Barrier and Explosion-Proof Materials for Fuel Tank Filling," stipulates that the vibration test debris value of barrier and explosion suppression materials must be ≤1mg / L. GB / T 35684-2017, "Technical Requirements for Barrier and Explosion-Proof Materials for Fuel Containers with Explosive Atmospheres," stipulates that the total amount of barrier and explosion suppression material broken off should not exceed 0.3% of the total weight of the installed material.

[0004] CN220854526U discloses a test device for testing the vibration durability of barrier explosion-proof materials. However, experiments have found that during the test using this device, debris caused by vibration may be hidden in the interlayer of the barrier explosion-proof material, and the pressure in the medium container cannot be monitored during the test. Therefore, the test accuracy and safety performance need to be further improved. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the existing technology and provide a device for testing the vibration durability of barrier and explosion suppression materials. This device can accurately measure the vibration durability of barrier and explosion suppression materials produced by different processes, providing a solid guarantee for the qualified production of barrier and explosion suppression materials.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for testing the vibration durability of barrier explosion suppression materials, characterized in that: it includes a medium container arranged on a vibration test bench, a sealing cover is provided on the top of the medium container, an exhaust valve, an air inlet valve and a pressure gauge are provided on the sealing cover, a bracket is provided in the medium container, a grid is provided on the bracket, a drainage hole is provided at the bottom of the medium container and below the grid, a drainage pipe is provided on the drainage hole; a thermocouple is installed on one side of the medium container.

[0007] The above-mentioned device for testing the vibration durability of barrier explosion suppression materials is characterized by further comprising a heater, wherein the heater is electrically connected to the thermocouple.

[0008] The above-mentioned device for testing the vibration durability of barrier explosion suppression materials is characterized in that a debris collection filter element is provided in the drainage pipe.

[0009] The above-mentioned device for testing the vibration durability of barrier explosion suppression materials is characterized in that a drain valve is installed on the drain pipe.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] 1. The device of the utility model provides a bracket and a grid in the medium container to maintain a certain physical space between the barrier explosion suppression material and the bottom surface of the medium container, providing a channel for the movement of debris shed from the material under external force impact environment, which is conducive to the smooth escape and subsequent collection of the debris, and ensures the reliability of the test results.

[0012] 2. The device of the utility model is equipped with a thermocouple, and after the fluid medium is drained, a heat source is introduced to dry the barrier explosion suppression material, thereby effectively solving the problem of detached debris sticking to the wall in a moist environment; then the air inlet valve provided on the sealing cover is opened to allow high-pressure air to pass through, and with the help of the high-pressure air flushing, the detached debris that may be hidden in the pores of the barrier explosion suppression material is flushed out; the synergistic effect of heating and high-pressure air flushing is utilized to ensure that all the debris shaken off during the vibration durability test is collected, thereby improving the precision and accuracy of the test results.

[0013] 3. The device of the utility model can monitor the pressure in the medium container of the barrier explosion-proof material during the vibration durability test by setting a pressure gauge. When a sudden pressure change occurs, the experiment can be terminated in time to ensure the personal safety of the experimenter.

[0014] 4. The device of the utility model can accurately measure the vibration durability of barrier and explosion suppression materials produced by different processes, providing a solid guarantee for the qualified production of barrier and explosion suppression material products.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the device of the utility model;

[0017] Figure 2 It is a plan view of the grille of the present invention.

[0018] Description of the accompanying drawings:

[0019] 1—Medium container; 2—Exhaust valve; 3—Inlet valve;

[0020] 4—Grille; 5—Drain valve; 6—Debris collection filter element;

[0021] 7—Vibration test bench; 8—Thermocouple; 9—Heater;

[0022] 10—drain pipe; 11—bracket; 12—sealing cover;

[0023] 13—Pressure gauge. DETAILED DESCRIPTION

[0024] like Figure 1 and Figure 2 As shown, the device for testing the vibration durability of barrier explosion suppression materials of the present invention includes a medium container 1 arranged on a vibration test bench 7, a sealing cover 12 is provided on the top of the medium container 1, an exhaust valve 2, an air inlet valve 3 and a pressure gauge 13 are provided on the sealing cover 12, a bracket 11 is provided in the medium container 1, a grille 4 is provided on the bracket 11, a drainage hole is provided at the bottom of the medium container 1 and below the grille 4, a drainage pipe 10 is provided on the drainage hole; a thermocouple 8 is installed on one side of the medium container 1.

[0025] In this embodiment, a heater 9 is further included, and the heater 9 is electrically connected to the thermocouple 8 .

[0026] In this embodiment, a debris collecting filter element 6 is provided in the drain pipe 10 .

[0027] In this embodiment, a drain valve 5 is installed on the drain pipe 10 .

[0028] The test method for testing the vibration durability of barrier explosion suppression materials using the device of the utility model is as follows:

[0029] (a) Open the sealing cover 12 of the medium container 1, fix the grid 4 to the bracket 11 of the medium container 1, and then, according to the specified filling requirements, load the barrier explosion suppression material into the medium container 1. Slowly add the fluid medium until it reaches 2 / 3 of the volume of the medium container 1. Close the sealing cover 12, and then fix the medium container 1 on the vibration test bench 7. Perform a vibration test according to the method specified in GB18296-2019;

[0030] (b) During the vibration test, observe the pressure gauge 13. If a sudden pressure change occurs, terminate the test immediately to ensure the personal safety of the experimenter. After the vibration test, slowly open the exhaust valve 2 to release the pressure in the medium container 1, then open the drain valve 5 to allow the test fluid to be discharged at a gravity flow rate, and then close the exhaust valve 2.

[0031] (c) Turn on the heater 9 and start heating. When the temperature reaches 70°C, maintain it for 1 to 2 hours.

[0032] (d) Open the air inlet valve 3 and fill the medium container 1 with high-pressure air of 0.1-0.2 MPa, and continue blowing for 5-10 minutes;

[0033] (e) Remove all barrier and explosion suppression materials, remove grille 4, and collect all debris from debris collection filter element 6 in drain pipe 10 of medium container 1. Transfer the debris to a beaker, rinse with anhydrous ethanol, and heat in a 150°C oven until the debris slides freely at the bottom. Repeat the rinse cycle three times, then dry the debris. After cooling to room temperature, weigh it using a scale with an accuracy of 1 / 10,000.

[0034] (f) Calculate the vibration durability debris value according to the formula, and take the average value of three vibration tests as the vibration test debris value of the barrier explosion suppression material.

[0035] The vibration durability chip D value is calculated according to the following formula.

[0036] D=(D2-D1) / V

[0037] In the formula: D is the debris from the vibration durability test, mg / L; D1 is the mass of the blank beaker, mg; D2 is the mass of the beaker containing the debris, mg; V is the volume of the barrier explosion-proof material sample, L.

[0038] The device of the utility model sets a bracket and a grid in the medium container, so that the barrier explosion suppression material and the bottom surface of the medium container maintain a certain physical space, providing a channel for the movement of debris shed from the material under the external force impact environment, which is conducive to the smooth escape and subsequent collection of the debris, and ensures the reliability of the test results; by setting a thermocouple, a heat source is introduced to dry the barrier explosion suppression material after the fluid medium is drained, effectively solving the problem of the shed debris sticking to the wall in a wet environment; then the air inlet valve set on the sealing cover is opened to let in high-pressure air, and the high-pressure airflow is used to flush out the debris that may be trapped The loose debris in the pores of the barrier and explosion-suppression materials is flushed out; the synergistic effect of heating and high-pressure airflow flushing is used to ensure that the debris shaken off during the vibration durability test is completely collected, thereby improving the precision and accuracy of the test results; by setting up a pressure gauge, the pressure in the medium container of the barrier and explosion-proof material can be monitored during the vibration durability test. When a sudden pressure change occurs, the experiment can be terminated in time to ensure the personal safety of the experimenter; the device can accurately measure the vibration durability of barrier and explosion-suppression materials made by different processes, providing a solid guarantee for the qualified production of barrier and explosion-suppression material products.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A device for testing the vibration durability of explosion-suppression and isolation materials, characterized by: The invention comprises a medium container (1) arranged on a vibration test bench (7), a sealing cover (12) being provided on the top of the medium container (1), an exhaust valve (2), an intake valve (3) and a pressure gauge (13) being provided on the sealing cover (12), a bracket (11) being provided in the medium container (1), a grille (4) being provided on the bracket (11), a drainage hole being provided at the bottom of the medium container (1) and below the grille (4), a drainage pipe (10) being provided on the drainage hole; and a thermocouple (8) being installed on one side of the medium container (1).

2. The device for testing the vibration durability of barrier explosion suppression materials according to claim 1, characterized in that: The invention also comprises a heater (9), wherein the heater (9) is electrically connected to the thermocouple (8).

3. The device for testing the vibration durability of barrier explosion suppression materials according to claim 1, characterized in that: A debris collecting filter element (6) is provided in the liquid discharge pipe (10).

4. The device for testing the vibration durability of barrier explosion suppression materials according to claim 1, characterized in that: A discharge valve (5) is installed on the discharge pipe (10).

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