Device for measuring apparent porosity and volume density

Abstract

The utility model relates to the technical field of material analysis by a weighing method, in particular to an apparent porosity and volume density measuring device. The apparent porosity and volume density measuring device comprises a metering scale, a support is arranged on a weighing platform of the metering scale, a suspension structure is arranged at the upper end of the support, a tray used for sinking into liquid is suspended on the suspension structure through a lifting rope or a lifting rod, a limiting structure is arranged on the upper side of the tray, and the limiting structure is provided with a containing groove for containing a to-be-measured object. The storage groove is provided with a limiting wall used for limiting the to-be-detected object so as to keep the position of the to-be-detected object in the liquid. When the mass of a to-be-measured object in liquid needs to be weighed, the to-be-measured object is placed in the liquid and placed in the storage groove of the limiting structure on the tray, the limiting wall of the storage groove is used for limiting the to-be-measured object so as to keep the position of the to-be-measured object in the liquid, and then the to-be-measured object can be weighed through the metering scale. And an object to be detected is placed in the object placing groove, so that the operation is relatively convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of analyzing materials by weighing methods, in particular to a device for measuring apparent porosity and bulk density. Background Art

[0002] Bulletproof panels are typically manufactured from materials such as diamond, boron carbide, carbon powder, and phenolic resin through a series of processes, including mixing, granulation, pressing, curing, siliconizing, firing, and post-processing. Apparent porosity and bulk density are key parameters for determining the density of the bulletproof panel specimen after reactive siliconizing and firing. These factors also significantly impact the performance of the specimen, affecting various aspects of the performance and use of the panel, such as compressive strength, three-point bending strength, and hardness. A high apparent porosity indicates a high number of pores in the panel that are open to the atmosphere. These pores not only reduce the load area but also concentrate stress in the vicinity of the pores, weakening the material's load capacity and ultimately reducing the panel's protective capabilities.

[0003] The determination of apparent porosity of bulletproof plate is based on the determination of bulk density. The measurement of bulk density is generally based on Archimedes principle. The bulk density is obtained by weighing the dry weight m1 of the sample, the mass m2 of the sample after saturation immersion and submersion in liquid, and the mass m3 of the sample after wiping off the surface water stains after immersion. where ρ ing is the density of the liquid at the test temperature. The mass of the bulletproof plate to be tested needs to be weighed in three states.

[0004] The current method for measuring the mass of a bulletproof plate suspended in a liquid involves placing a bracket on a balance, which serves as a weighing scale. The plate is then suspended from the bracket using a thin wire. The bracket, which holds the plate in place, allows the plate to sink into the liquid contained within a container without contacting the balance. The balance then measures the plate's mass in the liquid. However, this method of suspending the plate using wire is inconvenient. Furthermore, the plate, typically measuring 250 x 300 mm and weighing approximately 2 kg, is relatively large and heavy. In practice, the wire can easily become loose, compromising ease of use. Furthermore, a loosely fastened wire can easily cause the plate to tilt, potentially causing it to hit the sidewall of the container, affecting the accuracy of the measurement. Utility Model Content

[0005] The purpose of the utility model is to provide an apparent porosity and bulk density measuring device to solve the problem that the current apparent porosity and bulk density measuring device is inconvenient to operate by wrapping the object to be measured with iron wire and hanging it in liquid for weighing.

[0006] The technical solution of the device for measuring apparent porosity and bulk density of the utility model is:

[0007] A device for measuring apparent porosity and bulk density includes a measuring scale. A bracket is provided on the weighing platform of the measuring scale. A suspension structure is provided at the upper end of the bracket. A tray for sinking into a liquid is suspended by the suspension structure through a suspension rope or a suspension rod. A limiting structure is provided on the upper side of the tray. The limiting structure is provided with a placement groove for placing an object to be measured. The placement groove has a limiting wall for limiting the object to be measured to maintain the position of the object to be measured in the liquid.

[0008] Beneficial effects: The utility model is improved on the basis of the apparent porosity and bulk density measuring device in the prior art. A tray is suspended on the bracket, and the limiting structure on the tray is used to support and limit the object to be measured. The tray can be suspended in the corresponding liquid for immersing the object to be measured under the action of the hanging rope or the hanging rod. When the mass of the object to be measured in the liquid needs to be weighed, the object to be measured is placed in the liquid and placed in the storage groove of the upper limit structure of the tray. The limiting wall of the storage groove is used to limit the object to be measured to maintain the position of the object to be measured in the liquid, and then the object to be measured can be weighed by a measuring scale. When in use, the object to be measured can be placed in the storage groove, which is relatively convenient to operate.

[0009] Furthermore, the limiting structure includes a bottom plate supported on the tray and two side plates fixed on the upper side of the bottom plate and spaced apart from each other, and the two side plates are used to enclose the storage slot.

[0010] Furthermore, the bottom plate and the side plates are both provided with a hollow structure.

[0011] Furthermore, a weighing platform exposed to the air is provided at the upper end of the bracket.

[0012] Furthermore, the weighing platform is connected to the bracket in a flippable manner.

[0013] Furthermore, the bracket includes a base and an upper frame, the base is connected to the weighing platform, the suspension structure is arranged on the upper frame, one of the base and the upper frame is provided with a socket extending up and down, and the other is provided with a column for inserting into the socket to connect the base with the upper frame socket.

[0014] Furthermore, the upper frame includes a vertically arranged upright pole, the lower end of the upright pole constitutes the insertion column, the base includes a horizontal frame body arranged horizontally and a sleeve vertically arranged on the horizontal frame body, the horizontal frame body is connected to the weighing platform, and the inner hole of the sleeve constitutes the insertion hole.

[0015] Furthermore, there are at least two vertical poles, and a connecting rod is fixedly connected between two adjacent vertical poles.

[0016] Furthermore, the bracket includes vertical poles respectively arranged on opposite sides of the liquid container of the apparent porosity and bulk density measuring device, and the upper end of each vertical pole is provided with the above-mentioned suspension structure.

[0017] Furthermore, two vertical poles are provided on the same side of the liquid container, and the bracket includes a base located below the liquid container, the four corners of the base are respectively connected to the vertical poles, and the center of the base is connected to the center of the weighing platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the device for measuring apparent porosity and bulk density of the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the apparent porosity and bulk density measuring apparatus without the liquid container;

[0020] Figure 3 for Figure 2 Schematic diagram of placing bulletproof plates in the storage slot;

[0021] Figure 4 for Figure 1 Schematic diagram of the left side perspective of the apparent porosity and bulk density measurement device;

[0022] Figure 5 for Figure 4 Schematic diagram without the liquid container;

[0023] Figure 6 for Figure 1 Schematic diagram of the front view of the apparent porosity and bulk density measurement device;

[0024] Figure 7 for Figure 6 Schematic diagram without the liquid container.

[0025] In the figure: 1. Weighing scale; 2. Liquid container; 3. Horizontal frame; 4. Sleeve; 5. Vertical pole; 6. Connecting rod; 7. Cantilever rod; 8. Hook; 9. Lifting rope; 10. Pallet; 11. Limiting structure; 111. Bottom plate; 112. Side plate; 113. Storage trough; 12. Weighing platform; 100. Bulletproof plate. DETAILED DESCRIPTION

[0026] The utility model uses the placement groove on the suspension tray to limit the position of the object to be measured so as to maintain the position of the object to be measured in the liquid. When in use, the object to be measured can be placed in the placement groove, which is convenient to operate. Moreover, it is easy to place in place and is unlikely to hit the side wall of the liquid container, which is conducive to ensuring the accuracy of the measurement results.

[0027] Embodiments of the device for measuring apparent porosity and bulk density of the present invention:

[0028] The apparent porosity and bulk density measuring device includes a weighing scale with a bracket mounted on a weighing platform. A suspension structure is mounted on the bracket's upper end. A tray for submersion in a liquid is suspended from the suspension structure via a suspension rope. A retaining structure is mounted on the upper side of the tray. The retaining structure includes a storage slot for the object to be measured. The storage slot has retaining walls for retaining the object in the liquid. To measure the mass of the object in the liquid, simply place the object in the storage slot, making the operation relatively convenient.

[0029] Specifically, if Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown. The apparent porosity and bulk density measuring device of this embodiment is used to measure the bulletproof plate 100, and the bulletproof plate 100 is the object to be measured. The apparent porosity and bulk density measuring device includes a measuring scale 1, a liquid container 2, a bracket, a hanging rope 9, a tray 10, a limiting structure 11, and a weighing platform 12. The measuring scale 1 is an electronic balance and has a weighing platform on the top. The liquid container 2 is used to hold the liquid for the bulletproof plate 100 to be immersed in. The liquid is water. The liquid container 2 is a square water tank with an upward opening on the top. The left and right sides of the bottom of the liquid container 2 are respectively provided with legs for mounting the liquid container 2 above the measuring scale 1. The legs provided on the bottom of the liquid container 2 and the measuring scale 1 are supported on the same horizontal plane. The bracket includes a horizontal frame 3, a sleeve 4, a vertical rod 5, a connecting rod 6, a cantilever rod 7, and a hook 8. The bracket is fixed to the weighing platform of the measuring scale 1 and avoids the liquid container 2. The upper end of the bracket is provided with a hook 8 and a tray 10 is suspended by a suspension rope 9. The cantilever rod 7 and the hook 8 constitute a suspension structure. A limiting structure 11 is provided on the upper side of the tray 10. The tray 10 and the limiting structure 11 are both located in the liquid in the liquid container 2. The limiting structure 11 is provided with a placement groove 113 for the bulletproof plate 100. The placement groove 113 has a limiting wall for limiting the position of the object to be tested to maintain the position of the object to be tested in the liquid. The bulletproof plate 100 can then be weighed using the measuring scale 1, which is convenient to use. In other embodiments, a rigid suspension rod can also be used to suspend the tray.

[0030] The limiting structure 11 includes a bottom plate 111 supported on the tray 10 and two side plates 112 fixed on the upper side of the bottom plate 111 and spaced opposite to each other. The two side plates 112 are used to form a storage groove 113 for the bulletproof plate 100 to be placed. The size of the bottom plate 111 is smaller than the size of the tray 10. The bottom plate 111 and the tray 10 are both rectangular plates. The bottom plate 111 is supported in the central area of ​​the tray 10. The two side plates 112 are spaced apart from each other. The two side plates 112 are vertical plates. The two side plates 112 and the bottom plate 111 form a storage groove 113. The storage groove 113 is a through groove that runs through the left and right, and the notch of the storage groove 113 faces upward, so that the bulletproof plate 100 can be vertically placed in the storage groove 113. After the bulletproof plate 100 is placed in the storage groove 113, it will tilt and rest against the two side plates 112. The side plates 112 constitute the limiting walls of the storage groove 113 for limiting the bulletproof plate 100. Reinforcement ribs are provided on opposite sides of the two side panels 112 to improve the strength of the side panels 112. In other embodiments, a rectangular frame can be directly fixed on the pallet, and the space inside the rectangular frame is used to form a storage slot, and the rectangular frame constitutes a limiting structure.

[0031] Both the bottom plate 111 and the side plates 112 are provided with a hollow structure. The hollow structure is a series of elongated holes arranged at intervals. The hollow structure can reduce buoyancy and facilitate placement in liquids. Correspondingly, the tray 10 is also provided with a hollow structure. In other embodiments, the hollow structure can also be omitted.

[0032] The horizontal frame 3 and sleeve 4 together form the base of the bracket, which is fixedly connected to the weighing platform of the weighing scale 1. The horizontal frame 3 is located below the liquid container 2. The liquid container 2 is supported on the horizontal frame 3 by left and right legs. The liquid container 2 does not contact the weighing scale 1 or the bracket. The horizontal frame 3 includes two longitudinal bars spaced apart on the left and right sides, and a crossbar connecting the two longitudinal bars. The longitudinal bars extend in the front-to-back direction, with their front and rear ends protruding from the liquid container 2. Sleeves 4 are provided at the front and rear ends of the longitudinal bars. The sleeves 4 at each end of the two longitudinal bars form the four corners of the base, allowing each corner to be connected to a vertical bar 5. There are two vertical bars 5 on the same side of the liquid container 2. The crossbar of the horizontal frame 3 extends in the left-to-right direction. The left and right ends of the crossbar are fixedly connected to the middle of the longitudinal bar in the front-to-back direction. The middle of the crossbar in the left-to-right direction forms the center of the base. The center of the base is fixedly connected to the center of the weighing platform of the weighing scale 1 to ensure reliable and uniform force distribution. In other embodiments, the base can also be formed by two diagonal bars arranged crosswise. Both ends of the diagonal rod are connected to the vertical rods respectively.

[0033] The vertical rod 5, the connecting rod 6 and the cantilever rod 7 together constitute the upper frame of the bracket, and the upper frame is provided with two and is symmetrically arranged front and back. The same upper frame includes two vertical rods 5, two connecting rods 6 and two cantilever rods 7. The two upper frames are respectively arranged on the front and back sides of the liquid container 2, so that there are two vertical rods 5 on the front and back sides of the liquid container 2, and the two vertical rods 5 on the same side are spaced left and right. The vertical rods 5 are vertically arranged up and down, and the lower ends of the vertical rods 5 are connected to the sleeve 4. The cantilever rod 7 is arranged at the upper end of the vertical rod 5. The cantilever rod 7 is cantilevered horizontally and cantilevered in the front and back directions. The hook 8 is arranged at the cantilever end of the cantilever rod 7. The cantilever rod 7 is used to make the hook 8 located above the corresponding upper opening of the liquid container 2, so that the tray 10 can be suspended by the hanging rope 9. The hanging rope 9 can extend vertically and does not contact the inner wall of the liquid container 2. The four hooks 8 are respectively connected to the upper ends of the hanging rope 9. The hanging rope 9 can be made of iron wire, which is hung on the hook 8 by bending the iron wire. The four corners of the tray 10 are each equipped with structures connected to the lower ends of the suspension ropes 9, thereby maintaining the stability of the tray 10 through the suspension structures at the four corners. Suspending the tray 10 using vertical rods 5, located on opposite sides of the liquid container 2, facilitates stable suspension and balanced force distribution. In other embodiments, as needed, only one or three vertical rods can be installed on the same side of the liquid container to form the support for suspending the tray.

[0034] The lower ends of the vertical rods 5 are inserted into the corresponding sleeves 4. The sleeves 4 are arranged vertically, and the lower ends of the sleeves 4 are fixed to the horizontal frame 3. The inner holes of the sleeves 4 form sockets, and the lower ends of the vertical rods 5 form plugs for insertion into the sockets. This connects the base of the bracket to the sockets of the upper frame, making it easy to remove the upper frame and remove the liquid container 2 for cleaning and water replacement. In other embodiments, the vertical rods can also be fixedly connected to the base, while the legs at the bottom of the liquid container can be detached to facilitate the liquid container to be pulled out from the side.

[0035] Two connecting rods 6 on the same upper frame are connected between the two uprights 5 to improve structural strength and prevent the uprights 5 from rotating. In other embodiments, a square sleeve with a square inner hole can also be used, and the lower end of the corresponding upright can be a square head structure, so that the upright can be inserted into the sleeve to form a rotation-proof fit.

[0036] A weighing platform 12 is disposed at the upper end of the bracket and is exposed to the air. The platform is located above the liquid container 2 to facilitate measurement of the dry weight of the object to be tested and the mass of the object after immersion in the liquid. The platform is reversibly connected to the bracket. The platform is a square platform, and its rear edge is hinged to the overhanging rods 7 at the upper ends of the two vertical rods 5 located on the rear side of the liquid container 2. Applying force to the front edge of the platform can flip the platform 12 upward, facilitating the placement of the object to be tested into the liquid container 2. In other embodiments, the platform can also be placed directly on the overhanging rods of the bracket.

[0037] The apparent porosity and bulk density of the bulletproof panel 100 were analyzed using the Archimedean displacement method combined with weighing. During measurement, the bulletproof panel 100, after siliconizing, firing, and post-processing sandblasting, was placed in an oven for drying. After approximately 30 minutes, the panel was removed and cooled to a constant temperature. The cooled panel 100 was then placed on a weighing platform 12. The data measured by the measuring scale 1 at this point was the dry weight m1 of the panel 100. The panel 100 was then placed in a vacuum infiltration machine. An immersion solution was added to the machine, ensuring that the panel 100 was fully immersed in the solution and that the sample was saturated. After 30 minutes, the panel 100 was removed, the weighing platform 12 was opened, and the panel 100 was placed in a storage slot 113. The data displayed on the measuring scale 1 at this point was the mass m2 of the panel 100 suspended in the immersion solution after saturation. Remove the bulletproof plate sample 100 and wipe off any excess liquid from its surface with a gauze or sponge soaked in the immersion solution. Place the sample on a weighing platform 12. The data displayed on the weighing scale 1 is the saturated mass (m³) after wiping off any surface water stains. Calculate the apparent porosity π and bulk density ρ of the bulletproof plate sample 100 using the formula.

[0038] The calculation formula of apparent porosity π is:

[0039]

[0040] The calculation formula of volume density ρ is:

[0041] ρ ing is the density of the liquid at the test temperature.

[0042] When cleaning the liquid container 2, one side of the weighing platform 12 can be turned up, the hanging rope 9 connected to the hook 8 can be removed, and the vertical rod 5 can be pulled out from the sleeve 4, so that the liquid container 2 can be separated for cleaning.

[0043] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for measuring apparent porosity and bulk density, comprising a weighing scale, a weighing platform of which is provided with a bracket, an upper end of which is provided with a suspension structure, wherein: The suspension structure suspends a tray for sinking into the liquid through a suspension rope or a suspension rod. A limiting structure is provided on the upper side of the tray. The limiting structure is provided with a placement groove for placing the object to be tested. The placement groove has a limiting wall for limiting the object to be tested to maintain its position in the liquid.

2. The device for measuring apparent porosity and bulk density according to claim 1, wherein: The limiting structure includes a bottom plate supported on the tray and two side plates fixed on the upper side of the bottom plate and spaced apart from each other, and the two side plates are used to enclose the storage groove.

3. The device for measuring apparent porosity and bulk density according to claim 2, wherein: The bottom plate and the side plates are both provided with a hollow structure.

4. The device for measuring apparent porosity and bulk density according to claim 1, 2 or 3, wherein: A weighing platform exposed to the air is provided at the upper end of the bracket.

5. The device for measuring apparent porosity and bulk density according to claim 4, wherein: The weighing platform is connected to the bracket in a flippable manner.

6. The device for measuring apparent porosity and bulk density according to claim 1, 2 or 3, wherein: The bracket includes a base and an upper frame. The base is connected to the weighing platform. The suspension structure is set on the upper frame. One of the base and the upper frame is provided with a socket extending up and down, and the other is provided with a column for inserting into the socket to connect the base with the upper frame socket.

7. The device for measuring apparent porosity and bulk density according to claim 6, wherein: The upper frame includes a vertically arranged upright pole, the lower end of the upright pole constitutes the insertion column, the base includes a horizontal frame body arranged horizontally and a sleeve vertically arranged on the horizontal frame body, the horizontal frame body is connected to the weighing platform, and the inner hole of the sleeve constitutes the insertion hole.

8. The device for measuring apparent porosity and bulk density according to claim 7, wherein: There are at least two vertical poles, and a connecting rod is fixedly connected between two adjacent vertical poles.

9. The device for measuring apparent porosity and bulk density according to claim 1, 2 or 3, wherein: The bracket comprises vertical poles respectively arranged on two opposite sides of the liquid container of the apparent porosity and bulk density measuring device, and the upper end of each vertical pole is provided with the suspension structure.

10. The device for measuring apparent porosity and bulk density according to claim 9, wherein: There are two vertical poles located on the same side of the liquid container. The bracket includes a base located below the liquid container. The four corners of the base are respectively connected to the vertical poles, and the center of the base is connected to the center of the weighing platform.

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