Boundary device for testing plane air conductivity of composite guide and exhaust material

Abstract

The utility model provides a boundary device for testing the plane air conductivity of a composite guide and discharge material, which comprises a tray type boundary device for accommodating gravel particles, and is characterized in that the tray type boundary device comprises a rectangular tray made of a rigid material and used as a basic framework; according to the rectangular tray, a rectangular cavity for containing gravel particles is formed by a rectangular bottom plate, two rectangular long side plates and two rectangular short side plates, and the periphery of the outer side of the rectangular tray is wrapped by a surrounding edge made of a flexible material. The structure is reasonable, and the condition that gravel particles serve as boundary conditions in practical application can be simulated. The influence of gravel particles on the air guide performance of the guide and drainage material and the influence of gravel with different particle sizes on the air guide performance of the guide and drainage material can be evaluated.

Description

Technical Field

[0001] The utility model belongs to the technical field of geotechnical material detection, in particular to a composite drainage material plane air permeability testing boundary device. Background Art

[0002] As new geotechnical special drainage materials, drainage nets and drainage nets have excellent drainage performance. They are currently widely used as exhaust layers in landfill and other landfill cover systems. Because they may be in direct contact with sand and soil, the raised gravel and soil particles can easily cause the composite drainage material geotextile to be embedded in the net core, resulting in reduced gas conductivity of the drainage material, which in turn leads to excessive gas pressure in the landfill and damage to the landfill cover system. Since gravel of different particle sizes has different effects on the embedding of the drainage material geotextile into the net core, it is of great significance to evaluate the effect of gravel of different particle sizes on the gas conductivity of the drainage material.

[0003] The Chinese patent (patent number: 202211092610) applied by the applicant discloses a device and a test method for testing the planar air permeability of a diversion net. The test equipment mainly includes: a gas source device, a test bench and a pressure device, wherein the gas source device is used to provide test gas, and a gas pressure regulating device is provided on the gas source device; a test bench, which is connected to the gas source device, and a test cavity is provided on the test bench for carrying the diversion net; a pressure device, which is located above the test bench, and is used to apply normal pressure to the diversion net. This patent solves the defect in the prior art that designers cannot accurately select a diversion net that meets the requirements of planar air conduction performance, and realizes the selection of a composite diversion net of appropriate specifications according to the actual working conditions of the landfill closure, thereby avoiding the destruction of the closure system due to insufficient air conduction capacity. When testing, the test equipment of this patented technology uses hard boundaries (metal plates, HDPE plates, etc.) or soft boundaries (rubber strips of different hardness, etc.) as the test boundary conditions. It is unable to simulate the situation in actual applications where gravel particles are used as boundary conditions, and is unable to evaluate the effect of gravel particles on the air conduction performance of exhaust materials, as well as the effect of gravel of different particle sizes and gravel layers of different thicknesses on the air conduction performance of exhaust materials.

[0004] How to design a plane air permeability test boundary device for composite guide materials with a reasonable structure, which can simulate the situation where gravel particles are used as boundary conditions in actual applications, and can evaluate the influence of gravel of different particle sizes and thicknesses on the air conduction performance of guide materials, is a technical problem that needs to be solved urgently in this field. Utility Model Content

[0005] The utility model aims to provide a composite guide material plane air permeability test boundary device, which has a reasonable structure and can simulate the situation where gravel particles are used as boundary conditions in actual applications.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] A composite guide material plane air permeability test boundary device, including a tray-type boundary device for accommodating gravel particles, characterized in that the tray-type boundary device includes a rectangular tray made of rigid material as a basic skeleton, the rectangular tray is composed of a rectangular bottom plate, two rectangular long side plates and two rectangular short side plates to form a rectangular cavity for accommodating gravel particles, and the outer periphery of the rectangular tray is wrapped with a surrounding edge made of flexible material.

[0008] Improvements to the above technical solution: the length and width of the two rectangular long side panels are kept consistent, the length and width of the two rectangular short side panels are kept consistent, the height of the rectangular short side panels is 1.5-2.5 times the height of the rectangular long side panels; the height of the outer edges of the two rectangular long side panels is consistent with the height of the rectangular short side panels.

[0009] Further improvement of the above technical solution: the length of the rectangular long side plate is 300-450mm, and the height is 10-30mm; the length of the rectangular short side plate is 200-350mm, and the height is 20-60mm.

[0010] Further improvement to the above technical solution: the rectangular pallet is an integrated structure made of metal plates or HDPE plates, and the surrounding edge is an integrated structure made of rubber strips.

[0011] Further improvement of the above technical solution: the two rectangular long side panels are both height-adjustable telescopic panels, and the height-adjustable telescopic panels include a fixed plate and a lifting plate, the fixed plate is fixed on the rectangular bottom plate, the lifting plate is slidably connected to the fixed plate and fixed by a locking piece, and the surrounding edge is wrapped around the outer side of the lifting plate.

[0012] Compared with the prior art, the utility model has the following advantages and positive effects:

[0013] The utility model adopts a rectangular tray with a rigid structure as the skeleton structure, and the outer periphery of the rectangular tray is wrapped with a surrounding edge made of flexible material. The special soft surrounding structure can effectively buffer the migration of gravel particles under pressure during the experiment, which is closer to the working scene of the drainage material in actual engineering applications; it can simulate the situation where gravel particles are used as boundary conditions in actual applications, and can evaluate the influence of gravel particles on the gas conduction performance of drainage materials, as well as the influence of gravel of different particle sizes on the gas conduction performance of drainage materials. Rigid rectangular trays of different heights and the surrounding structure with soft surrounding edges can provide data and technical support for the actual engineering application design with gravel boundaries of different thicknesses, and can carry out targeted application design of the exhaust layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the use state of the boundary device for testing the plane air permeability of the composite guide material of the utility model during testing;

[0016] Figure 2 This is a three-dimensional picture of the utility model after the boundary device for testing the plane air permeability of the composite guide material is filled with gravel;

[0017] Figure 3 It is a three-dimensional diagram of the boundary device for testing the plane air permeability of the composite guide material of the utility model;

[0018] Figure 4 It is a top view of the boundary device for testing the plane air permeability of the composite guide material of the utility model;

[0019] Figure 5 It is a three-dimensional diagram of a rectangular tray in a boundary device for testing the plane air permeability of composite guide and exhaust materials of the utility model;

[0020] Figure 6 It is a side view of a rectangular tray in a boundary device for testing the plane air permeability of composite guide materials of the utility model.

[0021] Numbers in the figure: 1. Tray-type boundary device; 1.1. Rectangular short side plate; 1.2. Rectangular long side plate; 1.3. Rectangular bottom plate; 1.4. Surrounding edge; 2. Composite guide material; 3. Test cavity; 4. Gravel particles. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 5The utility model discloses an embodiment of a composite guide material plane air permeability test boundary device, comprising a tray-type boundary device 1 for accommodating gravel particles. The tray-type boundary device 1 comprises a rectangular tray made of rigid material as a basic skeleton. The rectangular tray is composed of a rectangular bottom plate 1.3, two rectangular long side plates 1.2 and two rectangular short side plates 1.1 to form a rectangular cavity for accommodating gravel particles. The outer periphery of the rectangular tray is wrapped with a surrounding edge 1 made of flexible material.

[0024] Furthermore, the length and width of the two rectangular long side panels 1.2 are consistent, the length and width of the two rectangular short side panels 1.1 are consistent, the height of the rectangular short side panel 1.1 is 1.5-2.5 (preferably 2) times the height of the rectangular long side panel 1.2; the height of the outer edges 1.4 of the two rectangular long side panels 1.2 is consistent with the height of the rectangular short side panel 1.1.

[0025] Preferably, the length of the rectangular long side plate 1.2 is 300-450 mm, and the height is 10-30 mm; the length of the rectangular short side plate 1.1 is 200-350 mm, and the height is 20-60 mm.

[0026] Furthermore, the rectangular tray is an integrated structure made of a metal plate or a HDPE plate. The metal plate is usually made of an aluminum plate, a steel plate or other metal plate.

[0027] Furthermore, the above-mentioned surrounding edge 1.4 is an integrated structure made of rubber strips. During the specific production, the above-mentioned surrounding edge 1.4 can be adhered to the outer surfaces of the four sides of the rectangular pallet using adhesive tape.

[0028] Furthermore, the two rectangular long side panels 1.2 are both height-adjustable telescopic panels, and the height-adjustable telescopic panels include a fixed panel and a lifting panel, the fixed panel is fixed on the rectangular bottom panel 1.3, the lifting panel is slidably connected to the fixed panel and fixed by a locking member, and the surrounding edge 1.4 is wrapped around the outer surface of the lifting panel. When used for testing, the height of the two rectangular long side panels 1.2 can be adjusted accordingly according to the thickness of the composite guide material 2 sample and the thickness of the gravel particles 4 filled in the tray-type boundary device 1.

[0029] The key technical points of the utility model are as follows: 1. The rigid skeleton is a special structure rectangular tray with inconsistent heights between the long side and the short side, which is strong and pressure-resistant; 2. The surrounding edge 1.4 made of flexible material is wrapped around the outer periphery of the rectangular tray, and the height of the soft surrounding structure of the surrounding edge 1.4 is consistent with the highest point of the rectangular tray. After the gravel particles 4 fill the tray-type boundary device 1, the gravel particles 4 will migrate and rub under the action of pressure. The rectangular tray with a rigid structure has a lower height, and the soft surrounding structure of the surrounding edge 1.4 on the outer side effectively buffers the migrated gravel particles 4, simulating the migration of gravel particles 4 in actual applications; 3. The rectangular tray with a rigid structure and the soft surrounding structure of the surrounding edge 1.4 have different heights. After filling with gravel, gravel boundaries of different thicknesses can be formed, which can simulate and evaluate the gas conductivity of the composite guide material under conditions of gravel of different thicknesses.

[0030] When the composite drainage material plane air permeability test boundary device of the utility model is used for testing, gravel particles 4 of different particle sizes are filled in the tray-type boundary device 1 according to the soil environment to be simulated, forming a boundary condition simulating the actual application environment, and the composite drainage material 2 sample is directly in contact with the tray-type boundary device 1 filled with gravel particles 4, and is placed in the test cavity 3. The width of the composite drainage material 2 sample is consistent with the width of the inner side of the tray-type boundary device 1, the composite drainage material 2 sample is closely fitted with the gravel particles 4, and the two sides of the composite drainage material 2 sample are fitted with the inner wall of the test cavity 3, ensuring that the medium completely passes through the inside of the composite drainage material 2 sample during the test. During the test, a certain pressure is applied by the pressure device above the test chamber 3. After water or air is passed, the test can be started. During the test, due to the pressure, the gravel particles 4 are embedded in the composite guide material 2 sample and migrate. The surrounding edge 1.4 on the rectangular short side plate 1.1 in the tray-type boundary device 1 effectively buffers the migration, which can effectively simulate the influence of the gravel particles 4 on the embedding of the composite guide material 2 sample and the migration of the gravel particles 4 under the actual application environment.

[0031] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A composite guide material plane air permeability test boundary device, comprising a tray-type boundary device for accommodating gravel particles, characterized in that: The tray-type boundary device includes a rectangular tray made of rigid material as a basic frame. The rectangular tray is composed of a rectangular bottom plate, two rectangular long side plates and two rectangular short side plates to form a rectangular cavity for accommodating gravel particles. The outer periphery of the rectangular tray is wrapped with a surrounding edge made of flexible material.

2. The composite guide material plane air permeability test boundary device according to claim 1, characterized in that: The length and width of the two rectangular long side panels are consistent, the length and width of the two rectangular short side panels are consistent, the height of the rectangular short side panel is 1.5-2.5 times the height of the rectangular long side panel; the height of the outer edges of the two rectangular long side panels is consistent with the height of the rectangular short side panels.

3. The composite guide material plane air permeability test boundary device according to claim 1 or 2, characterized in that: The length of the rectangular long side plate is 300-450 mm, and the height is 10-30 mm; the length of the rectangular short side plate is 200-350 mm, and the height is 20-60 mm.

4. The composite guide material plane air permeability test boundary device according to claim 1 or 2, characterized in that: The rectangular pallet is an integrated structure made of a metal plate or a HDPE plate, and the surrounding edge is an integrated structure made of a rubber strip.

5. The composite guide material plane air permeability test boundary device according to claim 3, characterized in that: The rectangular pallet is an integrated structure made of a metal plate or a HDPE plate, and the surrounding edge is an integrated structure made of a rubber strip.

6. The composite guide material plane air permeability test boundary device according to claim 1 or 2, characterized in that: The rectangular pallet is an integrated structure made of metal plates or HDPE plates.

7. The composite guide material plane air permeability test boundary device according to claim 5, characterized in that: The rectangular pallet is an integrated structure made of metal plates or HDPE plates.

8. The composite guide material plane air permeability test boundary device according to claim 1 or 2, characterized in that: The two rectangular long side panels are both height-adjustable telescopic panels, and the height-adjustable telescopic panels include a fixed plate and a lifting plate. The fixed plate is fixed on the rectangular bottom plate, and the lifting plate is slidably connected to the fixed plate and fixed by a locking piece. The surrounding edge is wrapped around the outer side surface of the lifting plate.

9. The composite guide material plane air permeability test boundary device according to claim 3, characterized in that: The two rectangular long side panels are both height-adjustable telescopic panels, and the height-adjustable telescopic panels include a fixed plate and a lifting plate. The fixed plate is fixed on the rectangular bottom plate, and the lifting plate is slidably connected to the fixed plate and fixed by a locking piece. The surrounding edge is wrapped around the outer side surface of the lifting plate.

10. The composite guide material plane air permeability test boundary device according to claim 7, characterized in that: The two rectangular long side panels are both height-adjustable telescopic panels, and the height-adjustable telescopic panels include a fixed plate and a lifting plate. The fixed plate is fixed on the rectangular bottom plate, and the lifting plate is slidably connected to the fixed plate and fixed by a locking piece. The surrounding edge is wrapped around the outer side surface of the lifting plate.

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