Testing device for testing liquid replacement rate of barrier explosion suppression material

Abstract

The utility model relates to a testing device for testing the liquid replacement rate of a barrier explosion suppression material. The testing device comprises a medium container used for containing a to-be-tested barrier explosion suppression material and liquid; the rotary driving device is connected with the medium container, and drives the medium container to rotate through the rotary driving device so as to increase the flow speed and pressure of the liquid, so that the speed of the liquid infiltrating the to-be-tested barrier explosion suppression material is increased; and the porous limiting plate is mounted in the medium container so as to fix the to-be-tested barrier explosion suppression material. A supergravity environment is created in a high-speed rotation mode, the surface tension of liquid is reduced, the liquid deforms and is forced to flow through the porous layer of the blocking explosion suppression material under the action of viscous shearing force and turbulent shearing force, and the liquid is prevented from flowing through the porous limiting plate in combination with the limitation of the porous limiting plate. And the method is suitable for rapid determination of the liquid replacement rate of the barrier explosion suppression material prepared by various processes, especially a foaming method.

Description

Technical Field

[0001] The utility model relates to the technical field of testing, in particular to a testing device for testing the liquid replacement rate of barrier explosion suppression materials. Background Art

[0002] Barrier explosion suppression materials are porous materials with high porosity and a large specific surface area, often in mesh, spherical, or other shapes, made from metal or organic polymers. When filled at a specific density into the fuel tanks of vehicles, ships, tanks, and other facilities, such as fuel tanks or pipelines, these materials can divide the originally large interior of the container into several smaller spaces. This effectively curbs the rapid spread of flames and the dramatic increase in explosion pressure in the event of an accidental fuel combustion, thereby weakening the explosion and effectively preventing significant loss of life and property from a container explosion.

[0003] To ensure effective explosion suppression, barrier and explosion-suppression materials are typically filled into fuel tanks or storage tanks at a rate of 60% to 80% of the container's original volume. This reduces the container's original effective volume, thereby impacting fuel storage capacity. To minimize the impact of barrier and explosion-suppression material filling on the effective volume of fuel tanks or storage tanks, GJB 8455-2015, "General Specification for Barrier and Explosion-Proof Materials for Fuel Tanks and Storage Tanks," specifies the effective volume reduction rate for barrier and explosion-suppression materials. For example, the effective volume reduction rate for barrier and explosion-suppression materials produced by stretch molding, foam molding, and injection molding must not exceed 2%, 5%, and 6%, respectively. The replacement rate is a key indicator of this reduction rate. It refers to the ratio (volume fraction) of the volume of liquid displaced by the barrier and explosion-suppression material when filled to the required volume relative to the volume of the tank or storage tank. Therefore, accurately testing the liquid replacement rate of barrier and explosion-suppression materials is crucial for determining their suitability for use.

[0004] CN214122149U discloses a test device for the liquid replacement rate of barrier and explosion-proof materials. The device comprises a medium container with a vertical partition in the middle, dividing the container into two test chambers of equal volume. The container has an opening at the top, which is sealed with a container cover. A volume scale is provided along the vertical edge of the partition on the front of the container. The bottom of the container has a drainage hole connected to a discharge valve. Advantages of this device include: ease of assembly and the ability to test the liquid replacement rate of various barrier and explosion-proof materials in a variety of contact media; improved testing efficiency, a simple and easy testing process, and clear and accurate test results; and the ability to simultaneously test the liquid replacement rates of two different types of barrier and explosion-proof materials and compare the test results. However, the device's testing time for the liquid replacement rate of barrier and explosion-suppressing materials produced by a foaming process exceeds 24 hours, resulting in low testing efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a testing device for testing the liquid replacement rate of barrier explosion suppression materials, so as to solve the problem that the existing testing device for the liquid replacement rate of barrier explosion suppression materials (especially barrier explosion suppression materials prepared by foaming process) has a long testing time and leads to low testing efficiency.

[0006] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0007] A testing device for testing the liquid replacement rate of barrier explosion suppression materials, comprising:

[0008] Medium container, used to contain the barrier and explosion suppression materials and liquids to be tested;

[0009] A rotation drive device is connected to the medium container and drives the medium container to rotate through the rotation drive device;

[0010] A porous limiting plate is installed in the medium container to fix the barrier and explosion suppression material to be tested.

[0011] Among them, when the medium container is in a rotating state, the porous limiting plate is used to limit the limited movement of the barrier explosion suppression material in the medium container space, which in disguise increases the flow rate and pressure of the liquid, thereby achieving an increase in the rate of liquid infiltration into the barrier explosion suppression material to be tested; when the medium container is in a stationary state, the oleophobic material and porous structure of the porous limiting plate are conducive to the rapid return of the liquid thrown up during the rotation process, thereby ensuring the accuracy of the test results.

[0012] This device uses high-speed rotation to create a hypergravity environment, significantly reducing the surface tension of the liquid. Under the influence of enormous viscous and turbulent shear forces, the liquid deforms and is forced to flow through the porous layer of the barrier explosion suppression material. Combined with the restriction of the porous limiting plate, the barrier explosion suppression material is prevented from being thrown above the porous limiting plate in the medium container, allowing the barrier explosion suppression material to be quickly and fully soaked in a short period of time. This device is suitable for rapid determination of the liquid replacement rate of barrier explosion suppression materials produced by various processes, especially the foaming process, greatly improving test efficiency. This effectively solves the problem of long test times and low test efficiency in existing devices for testing the liquid replacement rate of barrier explosion suppression materials (especially those produced by the foaming process).

[0013] Preferably, a slide rail is provided on the inner wall surface of the medium container in a vertical direction and is in sliding cooperation with the porous limiting plate, so that the porous limiting plate can slide back and forth on the slide rail.

[0014] By arranging a slide rail in vertical direction on the inner wall surface of the medium container to slide with the porous limiting plate, the height of the porous limiting plate can be adjusted accordingly according to the size of the explosion-suppressing material to be tested and the height of the liquid level, thereby realizing flexible adjustment and application of the porous limiting plate.

[0015] Preferably, when the medium container is in a stationary state, the height of the porous limiting plate is higher than the height of the liquid level.

[0016] By setting the height of the porous limiting plate higher than the liquid level when the medium container is stationary, the influence of the porous limiting plate on the solution height is avoided, thereby ensuring the accuracy and reliability of the test results.

[0017] Preferably, the porous limiting plate is made of oleophobic material.

[0018] Preferred oleophobic materials include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene / vinyl ether (FEVE), and polydimethylsiloxane (PDMS). These materials have low surface energy, making it difficult for fuel droplets to settle on the surface of the porous stop plate, further improving test efficiency and the accuracy of test results.

[0019] Preferably, the top of the medium container is provided with an opening, and a sealing cover is provided at the opening.

[0020] By setting an opening at the top of the medium container, it is convenient to put in and take out the liquid and the barrier explosion suppression material to be tested. At the same time, a sealing cover is set at the opening to effectively ensure the sealing performance of the medium container during the rotation process.

[0021] Preferably, a drainage hole is provided at the bottom end of the medium container.

[0022] Preferably, the drainage hole is a conical hole with a diameter gradually decreasing from top to bottom.

[0023] Preferably, a discharge valve is installed at the drainage hole.

[0024] Preferably, the drainage hole and the discharge valve are threadedly connected.

[0025] Preferably, a supporting stand is provided at the bottom end of the medium container.

[0026] By arranging a support stand at the bottom end of the medium container, the medium container is effectively supported, ensuring stable rotation during the rotation process.

[0027] Preferably, a connecting frame is provided at the bottom end of the supporting frame, the lower end of the connecting frame is mounted on a transmission frame, and the lower end of the transmission frame is connected to the driving end of the rotary driving device.

[0028] Preferably, the rotation drive device includes a housing, a motor, a frequency converter, a main switch and a timer. The motor is placed inside the housing, and the frequency converter, main switch and timer are arranged on the front of the housing. The output shaft of the motor is connected to the transmission frame, so that the medium container can perform bidirectional rotational motion driven by the motor.

[0029] Preferably, the motor is electrically connected to the frequency conversion switch, and the timer is electrically connected to the frequency conversion switch and the main switch.

[0030] Preferably, the medium container is cylindrical in shape.

[0031] Preferably, the medium container is made of transparent material.

[0032] By using a transparent material to make the medium container, it is convenient to observe the situation inside the medium container in real time.

[0033] Preferably, the outer wall of the medium container is provided with scale lines along the vertical direction.

[0034] By arranging scale lines in the vertical direction on the outer wall of the medium container, it is further facilitated to measure the difference in liquid volume before and after the barrier explosion suppression material to be tested is infiltrated and calculate the replacement rate.

[0035] Beneficial effects of the utility model:

[0036] (1) The test device for testing the liquid replacement rate of barrier explosion suppression materials of the utility model uses high-speed rotation to create a supergravity environment, which greatly reduces the surface tension of the liquid. Under the action of huge viscous shear force and turbulent shear force, the liquid is deformed and forced to flow through the porous layer of the barrier explosion suppression material. Combined with the restriction of the porous limiting plate, the barrier explosion suppression material will not be thrown above the porous limiting plate in the medium container, so that the barrier explosion suppression material can be quickly, fully and evenly infiltrated in a short time. It is suitable for the rapid determination of the liquid replacement rate of barrier explosion suppression materials produced by various processes, especially the foaming method, and greatly improves the test efficiency. In the field of testing technology, it has promotion and application value.

[0037] (2) The test device for testing the liquid replacement rate of the barrier explosion suppression material of the utility model cleverly sets a porous limiting plate in the medium container, so that when the medium container is rotating, the porous limiting plate is used to limit the limited movement of the barrier explosion suppression material in the medium container space, thereby indirectly increasing the flow rate and pressure of the liquid, effectively increasing the rate at which the liquid infiltrates the barrier explosion suppression material to be tested, and thus improving the test efficiency; after the barrier explosion suppression material to be tested in the medium container is rotated and infiltrated, the oleophobic material and porous structure of the porous limiting plate make it difficult for the fuel droplets to stay on the surface of the porous limiting plate, which is conducive to the rapid return of the liquid and ensures the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a first structural schematic diagram of a testing device for testing the liquid replacement rate of barrier explosion suppression materials according to the present invention;

[0039] Figure 2 This is a second structural schematic diagram of the testing device for testing the liquid replacement rate of barrier explosion suppression materials of the present invention;

[0040] Figure 3 Schematic diagram of the structure of the porous limiting plate;

[0041] Among them, 1-medium container; 2-rotation drive device, 21-housing, 22-motor, 23-frequency switch, 24-main switch, 25-timer, 26-base; 3-porous limit plate, 31-through hole; 4-slide rail; 5-sealing cover; 6-drain hole; 7-discharge valve; 8-support stand; 9-connecting frame; 10-transmission frame; 11-scale line; 12-drain pipe. DETAILED DESCRIPTION

[0042] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended solely to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0043] like Figures 1 to 3 As shown, a testing device for testing the liquid replacement rate of barrier explosion suppression materials includes:

[0044] Medium container 1, used for containing barrier and explosion suppression materials and liquids to be tested;

[0045] The rotary drive device 2 is connected to the medium container 1 and drives the medium container 1 to rotate through the rotary drive device 2;

[0046] The porous limiting plate 3 is installed in the medium container 1 to fix the barrier and explosion suppression material to be tested.

[0047] By cleverly placing a porous stopper plate within the medium container, the plate restricts the limited movement of the barrier explosion suppression material within the medium container during rotation, accelerating the flow of the liquid and increasing its pressure. This significantly increases the rate at which the liquid penetrates the barrier explosion suppression material under test, effectively improving test efficiency. After the test, the plate provides a convenient channel for the rapid return of the liquid thrown upward during rotation, enhancing the accuracy of the test results. However, due to the significant differences in pore size between barrier explosion suppression materials produced by different processes, barrier explosion suppression materials prepared using a foaming process typically have smaller pore sizes. Due to the large surface tension, the free liquid faces significant mass transfer resistance when diffusing into the pores, resulting in liquid adhering to the pore walls, making it difficult for the material to be fully wetted by the liquid. Therefore, to ensure the reliability of the liquid displacement rate test results, the barrier explosion suppression material usually needs to be immersed for a long time, resulting in low test efficiency, with the immersion time typically exceeding 24 hours. The present invention uses high-speed rotation to create a super-gravity environment, which greatly reduces the surface tension of the liquid. Under the action of huge viscous shear force and turbulent shear force, the liquid is deformed and forced to flow through the porous layer of the barrier explosion suppression material. Combined with the restriction of the porous limiting plate, the barrier explosion suppression material will not be thrown above the porous limiting plate in the medium container, so that the barrier explosion suppression material can be quickly and fully infiltrated in a short time, greatly improving the test efficiency. After testing, the test device for testing the liquid replacement rate of the barrier explosion suppression material in this embodiment has a test immersion time of the barrier explosion suppression material of only 5 min to 30 min.

[0048] In some embodiments, in order to facilitate the adjustment of the position of the porous limiting plate according to the size of the barrier explosion suppression material to be tested and the height of the liquid level, so as to adapt to actual flexible and changeable needs, the inner wall surface of the medium container 1 is set to have a slide rail 4 in the vertical direction that slides with the porous limiting plate 3, so that the porous limiting plate 3 can slide back and forth up and down on the slide rail 4.

[0049] In some embodiments, in order to avoid the influence of the porous limiting plate placed in the solution on the solution height and improve the test efficiency and the accuracy of the test results, it is limited that when the medium container is stationary, the height of the porous limiting plate 3 is higher than the height of the liquid surface.

[0050] Exemplarily, the porous limiting plate 3 is made of oleophobic material.

[0051] Exemplary oleophobic materials include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polychlorotrifluoroethylene / vinyl ether (FEVE), and polydimethylsiloxane (PDMS). These materials have low surface energy, making it difficult for fuel droplets to settle on the porous plate, further improving test efficiency and the accuracy of test results.

[0052] For example, the outer diameter of the porous limiting plate 3 is about 8.5 cm, and a plurality of through holes 31 with a diameter of about 8 mm are opened on the porous limiting plate 3.

[0053] In some embodiments, in order to facilitate the insertion and removal of liquid and barrier explosion suppression materials to be tested, an opening is provided at the top of the medium container 1. At the same time, in order to ensure the sealing performance of the medium container during rotation, a sealing cover 5 is provided at the opening.

[0054] In some embodiments, in order to facilitate the rapid outflow of liquid from the medium container after the test is completed, a drainage hole 6 is provided at the bottom end of the medium container 1 .

[0055] Exemplarily, the drain hole 6 is a conical hole with a diameter gradually decreasing from top to bottom, so as to facilitate the outflow of liquid and the installation of a discharge valve.

[0056] In some embodiments, in order to realize automatic outflow of liquid, a discharge valve 7 is installed at the drain hole 6 .

[0057] For example, in order to facilitate replacement and maintenance of the discharge valve, the drain hole 6 and the discharge valve 7 are connected by threaded connection.

[0058] Exemplarily, a drain pipe 11 is installed at the outlet of the discharge valve 7 to facilitate the discharge of liquid.

[0059] In some embodiments, in order to support the medium container and ensure stable rotation during the rotation process, a support stand 8 is provided at the bottom end of the medium container 1 .

[0060] In some embodiments, a connecting frame 9 is provided at the bottom end of the supporting frame 8 , the lower end of the connecting frame 9 is mounted on a transmission frame 10 , and the lower end of the transmission frame 10 is connected to the driving end of the rotary driving device 2 .

[0061] In some embodiments, the rotation drive device 2 includes a housing 21, a motor 22, a frequency converter 23, a main switch 24, and a timer 25. In order to ensure aesthetics while facilitating operation and ensuring the safety of the operator, the motor 22 is placed inside the housing 21, and the frequency converter 23, the main switch 24, and the timer 25 are arranged on the front of the housing 21. The output shaft of the motor 22 is connected to the transmission frame 10, so that the medium container 1 can perform bidirectional rotation under the drive of the motor 22.

[0062] Exemplarily, the motor 22 is electrically connected to the frequency conversion switch 23 , and the timer 25 is electrically connected to the frequency conversion switch 23 and the main switch 24 .

[0063] Exemplarily, the motor 22 is fixed to the bottom of the housing 21 via a base 26 .

[0064] Exemplarily, the medium container 1 is cylindrical in structure; usually, the inner diameter of the medium container 1 is about 10 cm and the height is about 40 cm.

[0065] For example, in order to facilitate real-time observation of the internal conditions of the medium container, the medium container 1 is made of a transparent material.

[0066] In some embodiments, in order to facilitate the measurement of the difference in liquid volume before and after infiltration of the barrier and explosion suppression material to be tested and the calculation of the replacement rate, a scale line 11 is set in the vertical direction on the outer wall of the medium container 1, so that the liquid replacement amount of the barrier and explosion suppression material to be tested can be obtained by directly reading the difference in scale before and after infiltration.

[0067] The test method of the above-mentioned test device for testing the liquid replacement rate of the barrier explosion suppression material in the actual test process includes the following steps:

[0068] Prepare the liquid medium for the test and pour it into medium container 1 at (20±1)℃;

[0069] Prepare a sample of the barrier and explosion suppression material to be tested. According to the filling performance requirements, place the barrier and explosion suppression material to be tested into the medium container 1. Record the initial liquid level H1 in the medium container 1. Fix the porous limit plate 3 3 cm above the liquid level. Close the sealing cover 5 on the top of the medium container 1 to seal it.

[0070] Turn on the main switch 24 of the rotary drive unit 2, adjust the speed to 1000-2500 rpm / min using the frequency converter 23, and adjust the rotation time to 5-30 minutes using the timer 25. Start the motor 22, driving the transmission frame 10, connecting frame 9, support frame 8, and medium container 1 to rotate in sequence. The high-speed rotation creates a hypergravity environment. Under the action of enormous viscous shear and turbulent shear forces, the liquid deforms and is forced to flow through the barrier and explosion suppression material. Combined with the restraint of the porous limit plate, the barrier and explosion suppression material is prevented from being thrown above the porous limit plate in the medium container, allowing it to be quickly, fully, and evenly soaked in a short period of time. After the rotation is completed, turn off the main switch 24. After the medium container 1 is left to rest for 10 minutes, record the final liquid level height H2 in the medium container 1 at this time to calculate the liquid replacement rate of the barrier and explosion suppression material under test. Open the drain valve 7 to drain the test liquid. Perform the test three times according to the above steps and take the average value to obtain the test results.

[0071] Calculate the liquid replacement rate B of the barrier and explosion suppression material to be tested according to the following formula.

[0072] B=(H2-H1) / H1×100%

[0073] Where: B is the replacement rate, %; H1 is the initial height of the liquid level, mL; H2 is the final height of the liquid level, mL.

[0074] In summary, the test device for testing the liquid replacement rate of barrier explosion suppression materials of the present invention creates a supergravity environment by high-speed rotation, which greatly reduces the surface tension of the liquid. Under the action of huge viscous shear force and turbulent shear force, the liquid is deformed and forced to flow through the porous layer of the barrier explosion suppression material. Combined with the restriction of the porous limiting plate, the barrier explosion suppression material will not be thrown to the top of the porous limiting plate in the medium container, so that the barrier explosion suppression material can be quickly and fully infiltrated in a short time, greatly improving the test efficiency. At the same time, by cleverly setting the porous limiting plate in the medium container, during the rotation of the medium container, the restriction of the displacement of the barrier explosion suppression material by the porous limiting plate can significantly increase the flow rate and pressure of the liquid, thereby effectively increasing the rate at which the liquid infiltrates the barrier explosion suppression material to be tested. When the rotational infiltration process of the barrier explosion suppression material to be tested in the medium container is completed, the porous limiting plate plays a role again, providing an effective channel for the thrown liquid to quickly fall back, thereby ensuring the accuracy of the test results. Therefore, in the technical field of testing the liquid replacement rate of barrier explosion suppression materials, the device of the utility model has promotion and application value.

[0075] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention shall fall within the protection scope of the present invention.

Claims

1. A test device for testing the liquid replacement rate of barrier explosion suppression materials, characterized in that: include: A medium container (1) for containing barrier explosion suppression materials and liquids to be tested; A rotary drive device (2) connected to the medium container (1) and driving the medium container (1) to rotate via the rotary drive device (2); A porous limiting plate (3) is installed in the medium container (1) to fix the barrier explosion suppression material to be tested.

2. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 1, characterized in that: The inner wall surface of the medium container (1) is provided with a slide rail (4) in a vertical direction, which is in sliding cooperation with the porous limiting plate (3), so that the porous limiting plate (3) can slide back and forth on the slide rail (4).

3. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 1, characterized in that: The top end of the medium container (1) is provided with an opening, and a sealing cover (5) is provided at the opening.

4. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 1, characterized in that: A drainage hole (6) is provided at the bottom end of the medium container (1).

5. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 4, characterized in that: A discharge valve (7) is installed at the drainage hole (6).

6. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 1, characterized in that: A supporting stand (8) is provided at the bottom end of the medium container (1).

7. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 6, characterized in that: A connecting frame (9) is provided at the bottom end of the support frame (8), the lower end of the connecting frame (9) is mounted on a transmission frame (10), and the lower end of the transmission frame (10) is connected to the driving end of the rotary drive device (2).

8. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 7, characterized in that: The rotary drive device (2) comprises a housing (21), a motor (22), a frequency conversion switch (23), a main switch (24) and a timer (25). The motor (22) is placed inside the housing (21), and the frequency conversion switch (23), the main switch (24) and the timer (25) are arranged on the front of the housing (21). The output shaft of the motor (22) is connected to the transmission frame (10), so that the medium container (1) can perform bidirectional rotation under the drive of the motor (22).

9. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 1, characterized in that: The medium container (1) is of cylindrical structure; And / or, the medium container (1) is made of a transparent material.

10. The testing device for testing the liquid replacement rate of barrier explosion suppression materials according to claim 1, characterized in that: The outer wall of the medium container (1) is provided with scale lines (11) in the vertical direction.

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