Sand-gravel mixture water content evaporation test box

Abstract

This utility model discloses a gravel material moisture content evaporation test chamber, including an outer chamber and an inner chamber disposed within the outer chamber. Both the outer and inner chambers are open-top, lidless boxes. The side and bottom plates of the outer chamber are not perforated, while the side and bottom plates of the inner chamber are evenly provided with multiple evaporation holes. Gaps are formed between the side and side plates of the outer and inner chambers, and between the bottom plates of the outer and inner chambers, to create an interstitial space. The thickness of the gap is not less than the maximum particle size of the gravel material. This utility model facilitates the evaporation of moisture content from the gravel material by evenly providing multiple evaporation holes on the side and bottom plates of the inner chamber. The absence of perforations on the side and bottom plates of the outer chamber prevents the simulated environment of the gravel material inside the inner chamber from being directly exposed to the atmosphere. The interstitial space between the outer and inner chambers allows for the filling of gravel material into the interstitial space during the test, thus synchronizing the evaporation state of the gravel material in the inner chamber with that of the actual gravel material across its entire cross-section.

Description

Technical Field

[0001] This utility model belongs to the technical field of evaporation test of moisture content in sand and gravel materials, and specifically relates to a test chamber for evaporation of moisture content in sand and gravel materials. Background Technology

[0002] Accurately understanding the evaporation properties of gravel is crucial for optimizing water usage during gravel paving, compaction, and dam construction. Current gravel moisture content evaporation tests are typically conducted in rigid, sealed containers, investigating evaporation performance through top free surface evaporation and mass loss. This approach significantly differs from the multi-directional ventilation and simultaneous evaporation characteristics of gravel under actual engineering conditions. Furthermore, while some existing devices incorporate openings at the bottom or in certain areas to improve gas exchange, the actual gravel surface after paving is not directly exposed to the atmosphere, leading to substantial deviations in the gravel moisture content evaporation data. Therefore, a novel test chamber capable of considering both top and lateral evaporation characteristics of gravel is urgently needed to improve the engineering applicability of gravel evaporation test results. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a sand and gravel material moisture content evaporation test chamber to address the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sand and gravel material moisture content evaporation test chamber, characterized in that: it includes an outer box and an inner box disposed inside the outer box, both of which are open-top, lidless boxes, the side panels and bottom plate of the outer box are not perforated, and the side panels and bottom plate of the inner box are uniformly provided with multiple evaporation holes, and there are gaps between the side panels of the outer box and the side panels of the inner box, as well as between the bottom plate of the outer box and the bottom plate of the inner box, to form an interval space, the thickness of the gap being not less than the maximum particle size of the sand and gravel material.

[0005] The above-mentioned gravel and sand material moisture content evaporation test chamber is characterized in that: an outer box extension flap is fixedly installed on the top of the side plate of the outer box, and an inner box extension flap is fixedly installed on the top of the side plate of the inner box, and the upper surface of the outer box extension flap and the upper surface of the inner box extension flap are coplanar. The above-mentioned gravel material moisture content evaporation test chamber is characterized in that: the inner box outer extension flap and the corresponding outer box outer extension flap are connected by an overlap plate; a first connection hole is provided at the connection position between the inner box outer extension flap and the overlap plate; a second connection hole is provided at the connection position between the outer box outer extension flap and the overlap plate; the overlap plate and the inner box outer extension flap, as well as the overlap plate and the outer box outer extension flap, are all connected by fixing screws; a locking nut is connected to the end of the fixing screw away from the overlap plate.

[0006] The above-mentioned gravel and sand material moisture content evaporation test chamber is characterized in that: the outer box and the outer box extension flap are manufactured as one piece, and the inner box and the inner box extension flap are manufactured as one piece.

[0007] The above-mentioned gravel material moisture content evaporation test chamber is characterized in that: the outer box, the outer box extension flap, the inner box, the inner box extension flap, and the overlapping plate are all acrylic sheets. The above-mentioned gravel material moisture content evaporation test chamber is characterized in that: the diameter of the evaporation hole is 0.5cm to 1.5cm. The beneficial effects of this invention are that by evenly opening multiple evaporation holes on the side and bottom plates of the inner box, the moisture content of the sand and gravel material can be easily evaporated. The side and bottom plates of the outer box have no openings, thus avoiding direct airflow between the simulated environment of the sand and gravel material in the inner box and the atmosphere. By forming an interval space between the outer and inner boxes, it is convenient to fill the interval space with sand and gravel material during the test to simulate the synchronous evaporation state of the sand and gravel material in the inner box across the entire cross section, so as to characterize the evaporation characteristics of the sand and gravel material paving layer under actual engineering conditions. This significantly improves the representativeness of the test results and avoids the problems of ventilation or enclosure on all sides of existing test devices. It provides a simple, stable and scientific test platform for the study of the evaporation performance of sand and gravel material and the optimization of water use in dams.

[0008] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0010] Figure 2 This is a schematic diagram of the inner box of this utility model.

[0011] Figure 3 This is a schematic diagram showing the connection relationship between the overlapping plate and the inner box extension flap or the outer box extension flap of this utility model.

[0012] Explanation of reference numerals in the attached figures: 1—Outer box; 2—Inner box; 3—Overlap plate; 4—Fixing screws; 5—Evaporation hole; 6—Inner casing extension flap; 7—First connecting hole; 8—Locking nut; 9—Outer casing extension flap. Detailed Implementation

[0013] like Figures 1 to 3As shown, this utility model includes an outer box 1 and an inner box 2 disposed inside the outer box 1. Both the outer box 1 and the inner box 2 are open-top, lidless boxes. The side panels and bottom plate of the outer box 1 have no openings. The side panels and bottom plate of the inner box 2 are evenly provided with a plurality of evaporation holes 5. There are gaps between the side panels of the outer box 1 and the side panels of the inner box 2, as well as between the bottom plate of the outer box 1 and the bottom plate of the inner box 2, to form an interval space. The thickness of the gap is not less than the maximum particle size of the gravel.

[0014] It should be noted that by evenly opening multiple evaporation holes on the side and bottom plates of the inner box, the moisture content of the sand and gravel can be easily evaporated. The side and bottom plates of the outer box have no openings, thus avoiding direct airflow between the simulated environment of the sand and gravel in the inner box and the atmosphere. By forming an interval space between the outer and inner boxes, it is convenient to fill the interval space with sand and gravel during the test to simulate the synchronous evaporation of the sand and gravel in the inner box across the entire cross section. This characterizes the evaporation characteristics of the sand and gravel paving layer under actual engineering conditions, thereby significantly improving the representativeness of the test results and avoiding the problems of ventilation or enclosure on all sides of existing test devices. This provides a simple, stable, and scientific test platform for the study of the evaporation performance of sand and gravel and the optimization of water use in dams.

[0015] In this embodiment, an outer box extension flap 9 is fixedly provided on the top of the side panel of the outer box 1, and an inner box extension flap 6 is fixedly provided on the top of the side panel of the inner box 2. The upper surface of the outer box extension flap 9 and the upper surface of the inner box extension flap 6 are coplanar. In this embodiment, the inner box outer extension flap 6 and the corresponding outer box outer extension flap 9 are connected by an overlap plate 3. A first connection hole 7 is provided at the connection position between the inner box outer extension flap 6 and the overlap plate 3, and a second connection hole is provided at the connection position between the outer box outer extension flap 9 and the overlap plate 3. The overlap plate 3 and the inner box outer extension flap 6, as well as the overlap plate 3 and the outer box outer extension flap 9, are all connected by fixing screws 4. A locking nut 8 is connected to the end of the fixing screw 4 away from the overlap plate 3.

[0016] In this embodiment, the outer box 1 and the outer box extension flap 9 are manufactured as one piece, and the inner box 2 and the inner box extension flap 6 are manufactured as one piece.

[0017] In this embodiment, the outer box 1, the outer box extension flap 9, the inner box 2, the inner box extension flap 6, and the overlapping plate 3 are all acrylic sheets. In this embodiment, the diameter of the evaporation hole 5 is 0.5cm to 1.5cm.

[0018] In use, this invention involves first filling the space between the bottom plate of the outer box 1 and the bottom plate of the inner box 2 with gravel. The gravel to be tested is then placed into the inner box 2, weighed, and then placed inside the outer box 1. The inner box 1 and inner box 2 are connected using overlapping plates 3, fixing screws 4, and locking nuts 8, ensuring a fixed space between the inner box 2 and the side walls and bottom of the outer box 1. Gravel is then filled into the space between the inner box 2 and the side walls of the outer box 1. After this process, the process is complete. After completion, the test chamber can be placed into the evaporation chamber for evaporation test. Since the inner chamber 2 has evaporation holes 5 on its side wall and bottom, and its outer side is also covered with gravel, the overall evaporation environment of the gravel in the inner chamber 2 is similar to the real environment. After the evaporation test, the inner chamber 2 is removed. By weighing the inner chamber 2 after evaporation, the difference between the two weighing results can be used as the evaporation amount of the gravel to determine the evaporation characteristics of the gravel paving layer, providing a reference for the study of the evaporation performance of gravel and the optimization of water use in dams.

[0019] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A sand-gravel mixture water content evaporation test box, characterized by: The outer box (1) and the inner box (2) are arranged inside the outer box (1). Both the outer box (1) and the inner box (2) are open-top, lidless boxes. The side plates and bottom plates of the outer box (1) have no openings. The side plates and bottom plates of the inner box (2) are evenly provided with multiple evaporation holes (5). There are gaps between the side plates of the outer box (1) and the side plates of the inner box (2), and between the bottom plates of the outer box (1) and the bottom plates of the inner box (2) to form a space. The thickness of the gap is not less than the maximum particle size of the gravel.

2. A sand-gravel mixture water content evaporation test chamber according to claim 1, characterized in that: The outer box (1) has an outer box extension flap (9) fixedly installed on the top of its side panel, and the inner box (2) has an inner box extension flap (6) fixedly installed on the top of its side panel. The upper surface of the outer box extension flap (9) and the upper surface of the inner box extension flap (6) are coplanar.

3. A gravel and sand material moisture content evaporation test chamber according to claim 2, characterized in that: The inner box outer extension flap (6) and the corresponding outer box outer extension flap (9) are connected by a lap plate (3). A first connection hole (7) is provided at the connection position between the inner box outer extension flap (6) and the lap plate (3). A second connection hole is provided at the connection position between the outer box outer extension flap (9) and the lap plate (3). The lap plate (3) and the inner box outer extension flap (6), as well as the lap plate (3) and the outer box outer extension flap (9), are all connected by fixing screws (4). A locking nut (8) is connected to the end of the fixing screw (4) away from the lap plate (3).

4. A gravel and sand material moisture content evaporation test chamber according to claim 2, characterized in that: The outer box (1) and the outer box extension flap (9) are manufactured as one piece, and the inner box (2) and the inner box extension flap (6) are manufactured as one piece.

5. A gravel and sand material moisture content evaporation test chamber according to claim 4, characterized in that: The outer box (1), the outer box extension flap (9), the inner box (2), the inner box extension flap (6), and the overlapping plate (3) are all acrylic sheets.

6. A gravel and sand material moisture content evaporation test chamber according to claim 1, characterized in that: The diameter of the evaporation hole (5) is 0.5cm to 1.5cm.

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