Exhaust plate with combined reinforcing rib structure and soil sample preparation device thereof
By using a combined reinforcing rib structure for the exhaust plate in the soil sample pressing device, the problems of unstable exhaust and easy structural deformation were solved, achieving efficient and low-cost soil sample preparation that meets the requirements of high-standard geotechnical testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-31
AI Technical Summary
The venting path in existing soil sample compaction devices is unstable, which leads to gas retention, affecting the uniformity and compaction of the soil sample and making it difficult to meet the requirements for preparing high-quality soil samples. In addition, traditional venting plates are simple in design, easy to deform, and costly.
The exhaust plate adopts a combined reinforcing rib structure, including a cylindrical center plate, equal-arm cross reinforcing ribs and M-ring ribs. The well-designed exhaust holes, circumferential seams and inter-rib seams form a stable exhaust channel and improve exhaust efficiency.
It improved the quality and efficiency of soil sample preparation, ensured the flatness of soil sample end faces, reduced material costs, and enhanced the rigidity and load-bearing capacity of the venting plate.
Smart Images
Figure CN224581240U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of geotechnical sample preparation and testing technology, specifically relating to an exhaust plate with a combined reinforcing rib structure and its soil sample preparation device. Background Technology
[0002] In geotechnical engineering practice, accurate and reliable geotechnical test data are crucial for engineering design, construction control, and long-term stability assessment. The acquisition of this data highly depends on the preparation of high-quality, compliant standard soil samples. Key physical and mechanical parameters of natural and modified soils, such as unconfined compressive strength, water stability, wet-dry cycle characteristics, and permeability coefficient, must be obtained through laboratory tests on standard-sized specimens.
[0003] Currently, the target dry density of soil samples in soil testing is usually determined by combining the maximum dry density obtained from compaction tests and the required compaction degree (usually not less than 90%). This results in a high target dry density, significantly increasing the difficulty of soil sample compaction in actual operation. At the same time, geotechnical testing has extremely strict requirements for the homogeneity of soil samples from the same batch. Indicators such as soil sample size, end face flatness, and dry density must all be controlled within a very small error range. Therefore, soil sample preparation has become a crucial part of geotechnical testing.
[0004] Soil, as a three-phase composite medium of solid, liquid, and gas, has a significant impact on compaction and sample quality if the gas, due to its compressibility and resilience, is not effectively expelled during the compaction process. Therefore, the ability to establish a stable and unobstructed venting channel during sample preparation directly determines the soil sample's density and overall homogeneity.
[0005] Traditional soil compaction systems typically lack a dedicated venting structure. Axial loads are applied directly to the soil via the indenter, and air in the soil can only escape through tiny, random gaps between the soil sample and the inner wall of the steel cylinder, and between the indenter and the cylinder wall. This method results in limited venting paths and unstable channels, easily leading to gas stagnation, reduced compaction efficiency, and impact on soil sample homogeneity and density, making it difficult to meet the requirements for preparing high-quality soil samples.
[0006] Even though existing technologies have incorporated venting plate structures into soil sample compaction devices, their rib designs are generally quite simple, often employing a single ring rib rather than a composite reinforcement structure. To meet stiffness requirements, this often relies on increasing plate thickness or using high-strength materials, leading to increased costs and material waste. Furthermore, traditional venting plates are prone to structural deformation under high termination pressure, affecting not only their own durability but also potentially causing uneven soil sample end faces, failing to meet the stringent requirements of high-standard geotechnical testing.
[0007] Therefore, how to provide an exhaust plate with a combined reinforcing rib structure, which improves exhaust efficiency through a reasonably arranged exhaust hole and composite reinforcing rib structure, thereby improving the quality and efficiency of soil sample preparation, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content
[0008] The purpose of this invention is to provide an exhaust plate with a combined reinforcing rib structure and a soil sample preparation device thereof, so as to solve at least one of the above-mentioned technical problems.
[0009] To achieve the above objectives, this utility model provides an exhaust plate with a combined reinforcing rib structure. The exhaust plate includes: a cylindrical main plate, a cylindrical center plate, the cylindrical center plate being fixed to the front of the cylindrical main plate, and the axis of the cylindrical center plate coinciding with the axis of the cylindrical main plate, the ratio of the radius of the cylindrical center plate to the radius of the cylindrical main plate being 3:10; equal-arm cross reinforcing ribs, the equal-arm cross reinforcing ribs being fixed to the front of the cylindrical main plate, and the center line of the equal-arm cross reinforcing ribs coinciding with the axis of the cylindrical main plate; and M ring ribs, M ring ribs being fixed to the front of the cylindrical main plate, and M... The annular ribs are arranged radially around the axis of the cylindrical center plate; annular seams are provided between adjacent annular ribs, and N interrib seams are equally spaced on each annular rib; the annular seams and the interrib seams are interconnected, and the annular seams are separated by the four arms of the equal-arm cross reinforcing ribs; an exhaust hole is provided, which is opened through the cylindrical main plate and located within the annular seam; wherein, M and N are both positive integers; the exhaust hole, the annular seam, and the interrib seams constitute an exhaust channel; the height of the cylindrical center plate is equal to the thickness of the equal-arm cross reinforcing ribs, and the thickness of the equal-arm cross reinforcing ribs is equal to the height of the annular ribs.
[0010] Preferably, the back of the cylindrical motherboard is a flat surface.
[0011] Preferably, each of the annular seams has the same width, and the vent holes are evenly spaced along the circumferential direction of the annular seams.
[0012] Preferably, each of the ring ribs has the same width, the maximum radius of the ring rib is equal to the radius of the cylindrical main plate, and the minimum radius of the ring rib is greater than the radius of the cylindrical center plate.
[0013] Preferably, N=4, and the four arms of the equal-arm cross reinforcing ribs coincide with the central axis of the two adjacent interrib seams on the same ring rib.
[0014] This utility model also provides a soil sample preparation device with a combined reinforcing rib structure for an exhaust plate. The soil sample preparation device includes: a steel cylinder, inside which a lower pressure head, a lower exhaust plate, lower filter paper, soil sample, upper filter paper, upper exhaust plate, and upper pressure head are arranged sequentially from bottom to top; the lower exhaust plate includes a cylindrical main plate, a cylindrical center plate, equal-arm cross reinforcing ribs, M-ring ribs, and exhaust holes; the cylindrical center plate is fixed to the front of the cylindrical main plate, and the axis of the cylindrical center plate coincides with the axis of the cylindrical main plate, and the ratio of the radius of the cylindrical center plate to the radius of the cylindrical main plate is 3:10; the equal-arm cross reinforcing ribs are fixed to the front of the cylindrical main plate, and the center line of the equal-arm cross reinforcing ribs coincides with the axis of the cylindrical main plate; the M-ring ribs are fixed to the front of the cylindrical main plate, and the M-ring ribs are arranged radially with the axis of the cylindrical center plate as the center; a vent hole is provided between adjacent rings of ribs. The cylindrical main plate has an annular seam, and N interrib seams are evenly spaced on each annular rib. The annular seam and the interrib seams are interconnected, and the annular seam is separated by the four arms of the equal-arm cross reinforcing rib. The vent hole is opened through the cylindrical main plate and located within the annular seam. The vent hole, the annular seam, and the interrib seams constitute an venting channel. The height of the cylindrical central plate is equal to the thickness of the equal-arm cross reinforcing rib, and the thickness of the equal-arm cross reinforcing rib is equal to the height of the annular rib. M and N are both positive integers. The back of the cylindrical main plate is a flat surface. The lower vent plate and the upper vent plate have the same structure. The front of the lower vent plate is in contact with the lower pressure head, and the back of the lower vent plate is in contact with the lower filter paper. The front of the upper vent plate is in contact with the upper pressure head, and the back of the upper vent plate is in contact with the upper filter paper. The gaps between the components and the venting channel constitute the gas discharge path in the soil sample.
[0015] Preferably, each of the annular seams has the same width, and the vent holes are evenly spaced along the circumferential direction of the annular seams.
[0016] Preferably, each of the ring ribs has the same width, the maximum radius of the ring rib is equal to the radius of the cylindrical main plate, and the minimum radius of the ring rib is greater than the radius of the cylindrical center plate.
[0017] Preferably, N=4, and the four arms of the equal-arm cross reinforcing ribs coincide with the central axis of the two adjacent interrib seams on the same ring rib.
[0018] Beneficial effects: This utility model provides an exhaust plate with a combined reinforcing rib structure, including a cylindrical main plate, a cylindrical center plate, equal-arm cross reinforcing ribs, M-ring ribs, and exhaust holes; the cylindrical center plate is fixed to the front of the cylindrical main plate, and the axis of the cylindrical center plate coincides with the axis of the cylindrical main plate; the equal-arm cross reinforcing ribs are fixed to the front of the cylindrical main plate, and the center line of the equal-arm cross reinforcing ribs coincides with the axis of the cylindrical main plate; the M-ring ribs are fixed to the front of the cylindrical main plate, and the M-ring ribs are arranged radially with the axis of the cylindrical center plate as the center, with annular seams between adjacent ring ribs, and N interrib seams are evenly spaced on each ring rib; the cylindrical center plate is located in the center of the cylindrical main plate, and the cylindrical center plate is used as the... The central cylindrical main plate is equipped with M ring ribs until the outermost ring ribs coincide with the outer diameter of the cylindrical main plate. Then, the ring ribs are divided into N regions through the interrib gaps. Each region is arranged radially around the cylindrical central plate, and the four arms of the equal-arm cross reinforcing ribs intersect with the ring ribs. In addition, the height of the cylindrical central plate, the thickness of the equal-arm cross reinforcing ribs and the height of the ring ribs are equal, so that their surfaces are on the same horizontal plane, so as to improve the stiffness of the vent plate and make it less prone to deformation when subjected to pressure loads. At the same time, vent holes are opened through the cylindrical main plate and are located inside the ring gaps, which promotes the formation of vent channels by the vent holes, ring gaps and interrib gaps, so that the internal gas of the soil can be quickly discharged when compressed. The exhaust plate provided by this utility model improves the load-bearing capacity of the exhaust plate through the layout design of cylindrical central plate, equal-arm cross reinforcing ribs and ring ribs, and optimizes the exhaust channel by combining the reasonable layout of exhaust holes, ring seams and inter-rib seams, so as to ensure that the gas is discharged more stably and smoothly during the soil sample pressing process, thereby improving the sample preparation efficiency and sample preparation quality. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the overall structure of an exhaust plate with a combined reinforcing rib structure provided by this utility model; Figure 2 A top view of an exhaust plate with a combined reinforcing rib structure provided by this utility model; Figure 3 A bottom view of an exhaust plate with a combined reinforcing rib structure provided by this utility model; Figure 4 yes Figure 2 Schematic diagram of the cross section at point AA; Figure 5 This is a schematic diagram of a soil sample preparation device with a combined reinforcing rib structure for an exhaust plate provided by this utility model; Figure label: 1. Cylindrical main plate; 2. Cylindrical center plate; 3. Equal-arm cross reinforcing ribs; 4. Ring ribs; 5. Ring seams; 6. Interrib seams; 7. Vent holes; 10. Steel cylinder; 20. Lower pressure head; 30. Lower exhaust plate; 40. Lower filter paper; 50. Soil sample; 60. Upper filter paper; 70. Upper exhaust plate; 80. Upper pressure head. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example 1 Please see Figure 1-4 This embodiment provides an exhaust plate with a combined reinforcing rib structure. The exhaust plate includes: a cylindrical main plate 1, a cylindrical center plate 2, the cylindrical center plate 2 being fixed to the front of the cylindrical main plate 1, and the axis of the cylindrical center plate 2 coinciding with the axis of the cylindrical main plate 1; an equal-arm cross reinforcing rib 3, the equal-arm cross reinforcing rib 3 being fixed to the front of the cylindrical main plate 1, and the center line of the equal-arm cross reinforcing rib 3 coinciding with the axis of the cylindrical main plate 1; and M-ring ribs 4, the M-ring ribs 4 being fixed to the front of the cylindrical main plate 1, and the M-ring ribs 4 being centered on the axis of the cylindrical center plate 2. The ribs are arranged radially; annular seams 5 are provided between two adjacent rings of the ribs 4, and N interrib seams 6 are provided at equal intervals on each ring of the ribs 4; the annular seams 5 and the interrib seams 6 are interconnected, and the annular seams 5 are separated by the four arms of the equal-arm cross reinforcing ribs 3; an exhaust hole 7 is provided through the cylindrical main plate 1 and located inside the annular seam 5; where M and N are both positive integers; the exhaust hole 7, the annular seam 5 and the interrib seams 6 constitute an exhaust channel; the height of the cylindrical center plate 2 is equal to the thickness of the equal-arm cross reinforcing ribs 3, and the thickness of the equal-arm cross reinforcing ribs 3 is equal to the height of the annular ribs 4.
[0023] Specifically, this utility model provides an exhaust plate with a combined reinforcing rib structure, including a cylindrical main plate 1, a cylindrical center plate 2, equal-arm cross reinforcing ribs 3, M-ring ribs 4, and an exhaust port 7; the cylindrical center plate 2 is fixed to the front of the cylindrical main plate 1, and the axis of the cylindrical center plate 2 coincides with the axis of the cylindrical main plate 1; the equal-arm cross reinforcing ribs 3 are fixed to the front of the cylindrical main plate 1, and the center line of the equal-arm cross reinforcing ribs 3 coincides with the axis of the cylindrical main plate 1; the M-ring ribs 4 are fixed to the front of the cylindrical main plate 1, and the M-ring ribs 4 are arranged radially with the axis of the cylindrical center plate 2 as the center, and annular seams 5 are provided between adjacent ring ribs 4, and N interrib seams 6 are equally spaced on each ring rib 4; the cylindrical center plate 2 is located in the middle of the cylindrical main plate 1, and is cylindrical in shape. Centered on the central plate 2, M ring ribs 4 are set on the cylindrical main plate 1 until the outermost ring rib 4 coincides with the outer diameter of the cylindrical main plate 1. Then, the ring rib 4 is divided into N regions through the interrib gaps 6. Each region is arranged radially with the cylindrical central plate 2 as the center, and the four arms of the equal-arm cross reinforcing ribs 3 intersect with the ring ribs 4. In addition, the height of the cylindrical central plate 2, the thickness of the equal-arm cross reinforcing ribs 3 and the height of the ring ribs 4 are equal, so that their surfaces are on the same horizontal plane, so that subsequent pressure loads can be applied to them, improving the stiffness of the exhaust plate and making it less prone to deformation. At the same time, exhaust holes 7 are opened through the cylindrical main plate 1, and the exhaust holes 7 are located inside the ring gaps 5, thereby promoting the exhaust holes 7, ring gaps 5 and interrib gaps 6 to form an exhaust channel, so that the internal gas of the soil can be quickly discharged when compressed. The exhaust plate provided by this utility model improves the load-bearing capacity of the exhaust plate through the layout design of cylindrical center plate 2, equal arm cross reinforcing ribs 3 and ring ribs 4, and optimizes the exhaust channel by combining the reasonable layout of exhaust holes 7, ring seams 5 and inter-rib seams 6, so as to ensure that the gas is discharged more stably and smoothly during the soil sample pressing process, thereby improving the sample preparation efficiency and sample preparation quality.
[0024] It should be noted that the exhaust plate provided in this embodiment is made of steel and can be integrally molded; the diameter of the exhaust hole 7 is adapted to the width of the circumferential seam 5; the ratio of the radius of the cylindrical center plate 2 to the radius of the cylindrical main plate 1 is 3:10.
[0025] In some possible implementations, the back side of the cylindrical motherboard 1 is a flat surface.
[0026] Specifically, the back of the cylindrical main board 1 is flat, which makes the end face of the prepared soil sample flat and ensures uniform stress during the loading process.
[0027] In some possible implementations, each of the annular seams 5 has an equal width, and the vent holes 7 are equally spaced along the circumferential direction of the annular seams 5.
[0028] Each circumferential seam 5 has an equal width, meaning that the distance between two adjacent circumferential ribs 4 that intersect (or are arranged radially) with the equal-arm cross reinforcing rib 3 is equal. A ring of vent holes 7 is provided in each circumferential seam 5. Where the circumferential rib 4 intersects with the equal-arm cross reinforcing rib 3, neither circumferential seam 5 nor vent holes 7 are provided.
[0029] In some possible implementations, each of the ring ribs 4 has the same width, the maximum radius of the ring rib 4 is equal to the radius of the cylindrical main plate 1, and the minimum radius of the ring rib 4 is greater than the radius of the cylindrical center plate 2.
[0030] The ring ribs 4 are arranged radially in a ring on the cylindrical main plate 1. The radius of the innermost ring rib 4 is larger than the radius of the cylindrical central plate 2, and a ring seam 5 is formed between the innermost ring rib 4 and the cylindrical central plate 2 for the placement of the vent holes 7. The radius of the outermost ring rib 4 is equal to the radius of the cylindrical main plate 1, so that the outer side of the outermost ring rib 4 and the outer side of the cylindrical main plate 1 are on the same cylindrical surface, which facilitates the placement of the vent plate into the steel cylinder 10 for soil sample pressing.
[0031] In some possible implementations, N=4, and the four arms of the equal-arm cross reinforcing rib 3 coincide with the central axis of the two adjacent interrib slots 6 on the same ring rib 4.
[0032] In this application, N=4, meaning that each ring rib 4 has four interrib slots 6 at equal intervals, dividing the ring rib 4 into four equal parts. Combined with the four arms of the equal-arm cross reinforcing rib 3, the four arms of the equal-arm cross reinforcing rib 3 are positioned precisely on the center line of the ring rib 4 within each region, and each arm of the equal-arm cross reinforcing rib 3 forms a 45° angle with its corresponding interrib slot 6. Furthermore, the number of ring ribs M can be determined according to actual conditions to ensure a reasonable layout of the vent holes 7 on the vent plate and the load-bearing ring ribs 4, enabling the rapid preparation of standard soil samples.
[0033] Example 2 like Figure 5As shown, this embodiment provides a soil sample preparation device with a combined reinforcing rib structure for the venting plate. The soil sample preparation device includes: a steel cylinder 10, and inside the steel cylinder 10, from bottom to top, a lower pressure head 20, a lower venting plate 30, a lower filter paper 40, a soil sample 50, an upper filter paper 60, an upper venting plate 70, and an upper pressure head 80 are arranged sequentially. The lower venting plate 30 includes a cylindrical main plate 1, a cylindrical center plate 2, equal-arm cross reinforcing ribs 3, M-ring ribs 4, and venting holes 7. The cylindrical center plate 2 is fixed to the cylindrical... The front side of the main board 1, with the axis of the cylindrical center plate 2 coinciding with the axis of the cylindrical main board 1; the equal-arm cross reinforcing rib 3 is fixed to the front side of the cylindrical main board 1, and the center line of the equal-arm cross reinforcing rib 3 coincides with the axis of the cylindrical main board 1; M rings of the annular rib 4 are fixed to the front side of the cylindrical main board 1, and the M rings of the annular rib 4 are arranged radially with the axis of the cylindrical center plate 2 as the center; annular seams 5 are provided between two adjacent rings of the annular rib 4, and each ring of the annular rib 4 has... N interrib slots 6 are evenly spaced; the annular slots 5 and the interrib slots 6 are interconnected, and the annular slots 5 are separated by the four arms of the equal-arm cross reinforcing ribs 3; the exhaust port 7 is opened through the cylindrical main plate 1 and located within the annular slots 5; the exhaust port 7, the annular slots 5, and the interrib slots 6 constitute an exhaust channel; the height of the cylindrical center plate 2 is equal to the thickness of the equal-arm cross reinforcing ribs 3, and the thickness of the equal-arm cross reinforcing ribs 3 is equal to the height of the annular ribs 4; wherein, M and N are both... The value is a positive integer. The back side of the cylindrical main plate 1 is a flat surface. The lower exhaust plate 30 and the upper exhaust plate 70 have the same structure. The front side of the lower exhaust plate 30 is in contact with the lower pressure head 20, and the back side of the lower exhaust plate 30 is in contact with the lower filter paper 40. The front side of the upper exhaust plate 70 is in contact with the upper pressure head 80, and the back side of the upper exhaust plate 70 is in contact with the upper filter paper 60. The gaps between the components and the exhaust channels constitute the gas discharge path in the soil sample 50.
[0034] Specifically, the soil sample preparation device provided by this utility model includes a steel cylinder 10 and, from bottom to top, a lower pressure head 20, a lower exhaust plate 30, a lower filter paper 40, a soil sample 50, an upper filter paper 60, an upper exhaust plate 70, and an upper pressure head 80 arranged sequentially inside the steel cylinder 10. The lower exhaust plate 30 and the upper exhaust plate 70 have the same structure. The exhaust holes 7, annular seams 5, and interrib seams 6 on the lower exhaust plate 30 and the upper exhaust plate 70 constitute an exhaust channel. The gaps between the components and the exhaust channel constitute the exhaust path for the gas in the soil sample 50. By setting the lower filter paper 40 between the lower exhaust plate 30 and the soil sample 50 and the upper filter paper 60 between the soil sample 50 and the upper exhaust plate 70, the soil sample 50 particles are prevented from clogging the exhaust holes 7, thus affecting the exhaust efficiency. At the same time, the radial annular and cross-shaped reinforcing rib structure arranged on the front of the lower exhaust plate 30 and the upper exhaust plate 70 improves the rigidity of the exhaust plate, thereby increasing the axial load capacity of the exhaust plate and improving the compaction of the soil.
[0035] In a specific embodiment, the inner diameter of the steel cylinder 10 is slightly larger than the diameter of the upper exhaust plate 70 (lower exhaust plate 30) to provide lateral confinement for the soil sample 50; the diameter of the upper filter paper 60 (lower filter paper 40) is adapted to the diameter of the upper exhaust plate 70 (lower exhaust plate 30) to prevent soil sample 50 particles from entering the exhaust hole 7; the soil sample 50 is natural soil or modified soil, and the soil sample 50 is composed of three phases of soil particles, liquid, and gas. During sample preparation, the soil sample 50 is filled between the upper filter paper 60 and the lower filter paper 40 in a layered filling manner, and after pressing and molding, a cylindrical soil sample 50 with flat end faces is obtained; the upper pressure head 80 and the lower pressure head 20 are the axial compression load transmission components in the soil sample preparation device, and their diameters are slightly smaller than the inner diameter of the steel cylinder 10 to facilitate disassembly or removal from the steel cylinder 10.
[0036] Example 3 This embodiment provides a method for preparing soil samples using a soil sample preparation device with a combined reinforcing rib structure and an exhaust plate. The method includes: installing a lower pressure head 20 at the bottom of a steel cylinder 10; sequentially installing a lower exhaust plate 30 and a lower filter paper 40 on top of the lower pressure head 20, with the front of the lower exhaust plate 30 in contact with the lower pressure head 20 and the back of the lower exhaust plate 30 in contact with the lower filter paper 40; layering target soil on top of the lower filter paper 40 until a preset height is reached, such that the lower end face of the target soil is in contact with the lower filter paper 40 and the upper end face of the target soil is flat; placing a... Filter paper 60 is used to make the upper filter paper 60 fit against the upper surface of the target soil. An upper venting plate 70 and an upper pressure head 80 are sequentially installed on the upper filter paper 60, with the front of the upper venting plate 70 fitting against the upper pressure head 80 and the back of the upper venting plate 70 fitting against the upper filter paper 60. Axial pressure is applied to the upper pressure head 80 and the lower pressure head 20 until the target soil reaches the termination dry density limit, at which point the pressure output stops. The upper pressure head 80 is removed, and the device is taken out of the steel cylinder 10 using a demolding machine or the lower pressure head 20. The components are gradually disassembled and collected for the next compaction test, and a standard soil sample is obtained.
[0037] Specifically, this embodiment provides a method for preparing soil samples using a soil sample preparation device with a combined reinforcing rib structure for an exhaust plate, which includes the following steps: (1) Install the lower pressure head 20 at the bottom of the steel cylinder 10, and install the lower exhaust plate 30 and the lower filter paper 40 on the lower pressure head 20 in sequence. Place the back of the lower exhaust plate 30 upward, tilt it at a certain angle, and let it fall into the bottom along the inner wall of the steel cylinder 10. Then use an iron rod to help to place the lower exhaust plate 30 flat, with the front of the lower exhaust plate 30 in contact with the lower pressure head 20. Similarly, use an iron rod to help to place the lower filter paper 40 on the lower exhaust plate 30 and make it in contact with the back of the lower exhaust plate 30. (2) The target soil is filled into the steel cylinder 10 by layered filling and vibration, and filled to the preset height, so that the lower end of the target soil is in close contact with the lower filter paper 40 and the upper end of the target soil is flat. (3) Tilt the upper filter paper 60 at a certain angle and use the iron rod to help it fall into the inner wall of the steel cylinder 10 and fit tightly against the upper surface of the target soil. (4) Install the exhaust plate 70 and the upper pressure head 80 on the upper filter paper 60 in sequence. Place the upper exhaust plate 70 with the front side facing up, tilt it at a certain angle, and let it fall into the cylinder along the inner wall of the steel cylinder 10. Then use an iron rod to help to place the upper exhaust plate 70 flat. The back of the upper exhaust plate 70 is in close contact with the upper filter paper 60, and the upper pressure head 80 is in close contact with the front side of the upper exhaust plate 70. (5) Apply axial pressure to the upper pressure head 80 and the lower pressure head 20 until the target soil reaches the termination dry density limit, and stop the pressure output; When pressing the sample, the axial pressure is transmitted to the upper exhaust plate 70 and soil sample 50 through the upper pressure head 80 and to the lower exhaust plate 30 and soil sample 50 through the lower pressure head 20. Under the action of the compressive load, the upper pressure head 80 and the upper exhaust plate 70 are in contact, and the lower pressure head 20 and the lower exhaust plate 30 are in contact. The compressive stress inside the soil sample 50 increases, and the gas flows through the upper filter paper 60 (lower filter paper 40) and escapes through the exhaust hole 7, the interrib gap 6 and the annular gap 5. As the gas is discharged, the compressibility of the soil sample 50 increases, the porosity between particles decreases, and the dry density of the soil sample 50 increases until the termination pressure or the termination dry density limit is reached. Then the device stops the pressure output and the sample preparation ends. (6) Remove the upper pressure head 80, and take out each component from the steel cylinder 10 by demolding machine or with the help of the lower pressure head 20. Gradually disassemble and separate each component and collect them for the next pressing test and obtain a standard soil sample.
[0038] It should be noted that since Embodiment 3 is an embodiment under the same inventive concept as Embodiments 1 and 2, and some of its structures are completely identical, the structures in Embodiment 3 that are substantially the same as those in Embodiments 1 and 2 will not be described in detail. For the parts not described in detail, please refer to Embodiments 1 and 2.
[0039] In summary, compared with the prior art, this utility model has the following advantages: (1) This utility model improves the overall rigidity of the exhaust plate by rationally arranging the cylindrical center plate, ring ribs and equal-arm cross reinforcing ribs on the cylindrical main plate, so that it can withstand higher axial loads; and rationally arranging the ring seam, inter-rib seam and exhaust hole on the cylindrical main plate forms a stable exhaust channel, improves the exhaust efficiency, and thus improves the quality and efficiency of soil sample preparation.
[0040] (2) The exhaust plate provided by this utility model can be integrally formed and has a flat back, which can ensure that the end face of the soil sample is flat after pressing, and facilitates large-scale application.
[0041] (3) In the soil sample preparation device, filter paper is set between the exhaust plate and the soil sample to avoid soil particles blocking the exhaust hole and affecting the normal operation of the exhaust channel, and also to reduce the cleaning time of the exhaust plate.
[0042] Finally, it should be noted that the above embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. All should be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
[0043] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. An exhaust panel having a combined stiffening rib structure, characterized by, The exhaust plate includes: A cylindrical motherboard, wherein the front side of the cylindrical motherboard is a flat surface; A cylindrical center plate is fixed to the front of the cylindrical main plate, and the axis of the cylindrical center plate coincides with the axis of the cylindrical main plate. The ratio of the radius of the cylindrical center plate to the radius of the cylindrical main plate is 3:
10. An equal-arm cross-shaped reinforcing rib is fixed to the front side of the cylindrical main board, and the center line of the equal-arm cross-shaped reinforcing rib coincides with the axis of the cylindrical main board. M ring ribs are fixed to the front of the cylindrical main plate and are arranged radially with the axis of the cylindrical central plate as the center. There is a ring seam between two adjacent ring ribs and N interrib seams are equally spaced on each ring rib. The ring seams and the interrib seams are interconnected and separated by the four arms of the equal-arm cross reinforcing ribs. An exhaust port is provided, which extends through the cylindrical main plate and is located within the annular seam. Wherein, M and N are both positive integers; the exhaust hole, the annular seam, and the interrib seam constitute an exhaust channel; the height of the cylindrical center plate is equal to the thickness of the equal-arm cross reinforcing rib, and the thickness of the equal-arm cross reinforcing rib is equal to the height of the annular rib.
2. An exhaust panel having a combined reinforcing rib structure as claimed in claim 1, characterised in that, The back of the cylindrical motherboard is a flat surface.
3. The exhaust panel having a combined reinforcing rib structure of claim 1, wherein, Each of the annular seams has the same width, and the vent holes are evenly spaced along the circumferential direction of the annular seams.
4. The exhaust panel having a combined stiffening rib structure of claim 1, wherein, Each of the ring ribs has the same width, the maximum radius of the ring rib is equal to the radius of the cylindrical main plate, and the minimum radius of the ring rib is greater than the radius of the cylindrical center plate.
5. The exhaust panel having a combined reinforcing rib structure of claim 1, wherein, N=4, and the four arms of the equal-arm cross reinforcing ribs coincide with the central axis of the two adjacent interrib seams on the same ring rib.
6. A soil sample preparation apparatus having an exhaust plate with a combined reinforcement rib structure, characterized by, The soil sample preparation device includes: A steel cylinder, inside which, from bottom to top, are arranged a lower pressure head, a lower exhaust plate, a lower filter paper, a soil sample, an upper filter paper, an upper exhaust plate, and an upper pressure head; The lower exhaust plate includes a cylindrical main plate, a cylindrical center plate, equal-arm cross reinforcing ribs, M-ring ribs, and exhaust holes; the cylindrical center plate is fixed to the front of the cylindrical main plate, and the axis of the cylindrical center plate coincides with the axis of the cylindrical main plate, the ratio of the radius of the cylindrical center plate to the radius of the cylindrical main plate is 3:10; the equal-arm cross reinforcing ribs are fixed to the front of the cylindrical main plate, and the center line of the equal-arm cross reinforcing ribs coincides with the axis of the cylindrical main plate; the M-ring ribs are fixed to the front of the cylindrical main plate, and the M-ring ribs are... The cylindrical center plate is arranged radially around its axis; annular seams are provided between adjacent rings of ribs, and N interrib seams are equally spaced on each ring of ribs; the annular seams and the interrib seams are interconnected, and the annular seams are separated by the four arms of the equal-arm cross reinforcing ribs; the exhaust port is opened through the cylindrical main plate and located within the annular seams; the exhaust port, the annular seams, and the interrib seams constitute an exhaust channel; the height of the cylindrical center plate is equal to the thickness of the equal-arm cross reinforcing ribs, and the thickness of the equal-arm cross reinforcing ribs is equal to the height of the annular ribs; Where M and N are both positive integers, the back of the cylindrical main board is a flat surface; the lower exhaust plate and the upper exhaust plate have the same structure, the front of the lower exhaust plate is in contact with the lower pressure head, the back of the lower exhaust plate is in contact with the lower filter paper, the front of the upper exhaust plate is in contact with the upper pressure head, and the back of the upper exhaust plate is in contact with the upper filter paper; the gaps between the components and the exhaust channel constitute the gas discharge path in the soil sample.
7. The soil sample preparation apparatus having a combined reinforced rib structure of exhaust plate according to claim 6, wherein, Each of the annular seams has the same width, and the vent holes are evenly spaced along the circumferential direction of the annular seams.
8. The soil sample preparation apparatus having a combined reinforced rib structure of exhaust plate according to claim 7, wherein, Each of the ring ribs has the same width, the maximum radius of the ring rib is equal to the radius of the cylindrical main plate, and the minimum radius of the ring rib is greater than the radius of the cylindrical center plate.
9. The soil sample preparation device with a combined reinforcing rib structure for an exhaust plate as described in claim 8, characterized in that, N=4, and the four arms of the equal-arm cross reinforcing ribs coincide with the central axis of the two adjacent interrib seams on the same ring rib.