Device for preparing environmental geotechnical engineering sample

Abstract

The utility model belongs to the technical field of environmental geotechnical engineering samples, and particularly relates to a device for preparing environmental geotechnical engineering samples, which comprises a base, operation keys are arranged on the front side wall of the base, a cylindrical sample barrel is mounted in the middle of the top surface of the base, and a top cover is mounted on the top surface of the cylindrical sample barrel in a threaded manner. The cylindrical sample cylinder comprises left and right identical semicircular sheets, a hinge is rotatably mounted between the rear ends of the left and right identical semicircular sheets, a convex plug and a concave socket are respectively arranged between the front ends of the left and right identical semicircular sheets, a connector is mounted on the front side wall of each semicircular sheet, and a plastic inner wall is mounted on the side wall of an inner cavity of each semicircular sheet; a buckle is installed in the middle of the side wall of an inner cavity of each semicircular piece, a plug pin is installed on the rear side wall of the plastic inner wall, the buckles and the plug pins are connected in an inserted mode, a groove is formed in the middle of the top face of the base, a compactor is installed in an inner cavity of the groove, and a lifting handle is installed on the top face of the top cover. The structure is simple, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental geotechnical engineering samples, in particular to a device for preparing environmental geotechnical engineering samples. Background Art

[0002] In the field of geotechnical engineering, in order to test the strength of geotechnical materials, it is necessary to prepare cylindrical specimens for indoor unconfined compressive strength tests. Whether it is remolded soil or solidified soil that is improved by adding cement, lime, fly ash and other solidifying agents to natural soil, the sample preparation method is usually to place the raw materials into a steel mold of the same size as the sample, compact it, and then remove it with a jack. In recent years, the remediation of contaminated sites has become a research hotspot in the field of environmental geotechnical engineering, and testing the strength of heavy metal contaminated soil or solidified heavy metal contaminated soil is a necessary step. There are no clear specifications for the preparation of heavy metal contaminated soil or solidified heavy metal contaminated soil samples, and usually the above-mentioned traditional geotechnical sample preparation methods and devices are directly used.

[0003] In the existing technology, heavy metal-contaminated soil samples are in direct contact with steel molds, which easily causes chemical reactions and changes in the surface properties of the samples. In addition, the fixed cylinder is difficult to clean inside after the device is used, which affects its secondary use. Therefore, we propose a device for preparing environmental geotechnical engineering samples. Utility Model Content

[0004] The purpose of the utility model is to provide a device for preparing environmental geotechnical engineering samples to solve the problems raised in the above background technology that heavy metal contaminated soil samples are prone to chemical reactions when in direct contact with steel molds, and the interior is difficult to clean, affecting secondary use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for preparing environmental geotechnical engineering samples, comprising a base, an operation button is provided on the front side wall of the base, a cylindrical sample tube is installed in the middle of the top surface of the base, and a top cover is threadedly installed on the top surface of the cylindrical sample tube, the cylindrical sample tube includes left and right identical semicircular pieces, a hinge is rotatably installed between the rear ends of the left and right identical semicircular pieces, a convex plug and a concave socket are respectively provided between the front ends of the left and right identical semicircular pieces, a connector is installed on the front side wall of the semicircular piece, a plastic inner wall is installed on the inner cavity side wall of the semicircular piece, a buckle is installed in the middle of the inner cavity side wall of the semicircular piece, a pin is installed on the rear side wall of the plastic inner wall, the buckle and the pin are plugged into each other, a groove is opened in the middle of the top surface of the base, and a compactor is installed in the inner cavity of the groove.

[0006] Preferably, a handle is installed on the top surface of the top cover, an outer thread is provided on the bottom of the top cover, an inner thread is provided on the top of the inner cavity of the semicircular piece, and the inner thread and the outer thread are threadedly connected.

[0007] Preferably, the male plug and the female socket are plugged into each other, a rubber strip is provided on the male plug, and the connector is a buckle.

[0008] Preferably, the compactor comprises: a cylinder and a pressing plate, the diameter of the pressing plate is smaller than the diameter of the inner cavity of the cylindrical sample tube, and a sealing strip is installed around the pressing plate.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] 1) The device is equipped with a plastic inner wall, a buckle is installed in the middle of the inner cavity side wall of the semicircular piece, and a pin is installed on the rear side wall of the plastic inner wall. The buckle and the pin are plugged into each other, and the plastic inner wall is installed on the inside. The experimental sample will not come into contact with the metal. The device has a simple structure and is easy to use.

[0011] 2) The cylindrical sample tube on the device includes left and right identical semicircular pieces, and a hinge is rotatably installed between the rear ends of the left and right identical semicircular pieces. A connector is installed on the front side wall of the semicircular piece. The connector facilitates opening the cylindrical sample tube for cleaning the interior, and the cleaning does not affect the secondary experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the semicircular sheet structure of the utility model;

[0014] Figure 3 This is a schematic diagram of the top cover structure of the utility model;

[0015] Figure 4 This is a schematic diagram of the semicircular sheet structure of the utility model;

[0016] Figure 5 This is a schematic diagram of the cylinder and pressure plate structure of the utility model.

[0017] In the figure: 1. Base; 2. Operation button; 3. Cylindrical specimen tube; 4. Top cover; 5. Handle; 6. Plastic inner wall; 7. Semicircular piece; 8. Hinge; 9. Connector; 10. Male plug; 11. Female socket; 12. Internal thread; 13. External thread; 14. Groove; 15. Cylinder; 16. Pressure plate; 17. Sealing strip; 18. Latch; 19. Buckle. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0020] See also Figure 1-5 The utility model provides a technical solution: a device for preparing environmental geotechnical engineering samples, including a base 1, an operation button 2 is provided on the front side wall of the base 1, the operation button 2 controls the opening and closing of the cylinder 15, a cylindrical sample tube 3 is installed in the middle of the top surface of the base 1, the cylindrical sample tube 3 is used to place the experimental sample, and a top cover 4 is threadedly installed on the top surface of the cylindrical sample tube 3. When squeezing, the top cover 4 can withstand the squeezing force of the lower end, and the cylindrical sample tube 3 includes left and right identical semicircular pieces 7, and a hinge 8 is rotatably installed between the rear ends of the left and right identical semicircular pieces 7. The two semicircular pieces 7 are combined to form the cylindrical sample tube 3, and a convex plug 10 and a concave socket 11 are respectively provided between the front ends of the left and right identical semicircular pieces 7, and the convex plug 10 and the concave socket 11 are mutually connected. Plugging can improve the sealing more firmly. A connector 9 is installed on the front side wall of the semicircular piece 7. The connector 9 is convenient for opening the cylindrical sample tube 3 to clean the inside, and the secondary experiment is not affected after cleaning. A plastic inner wall 6 is installed on the inner cavity side wall of the semicircular piece 7. The heavy metal contaminated soil sample is in direct contact with the steel mold and is prone to chemical reactions, while the internal plastic inner wall 6 can block contact with the metal. A snap 19 is installed in the middle of the inner cavity side wall of the semicircular piece 7, and a pin 18 is installed on the rear side wall of the plastic inner wall 6. The snap 19 and the pin 18 are plugged in, and the plugging can be convenient and quick to disassemble and install. A groove 14 is opened in the middle of the top surface of the base 1, and a compactor is installed in the inner cavity of the groove 14. The compactor squeezes the test sample inside the cylindrical sample tube 3.

[0021] Among them, the top surface of the top cover 4 is equipped with a handle 5, which is convenient for taking. The bottom of the top cover 4 is provided with an external thread 13, and the top of the inner cavity of the semicircular piece 7 is provided with an internal thread 12. The internal thread 12 and the external thread 13 are threadedly connected, and the threaded connection is tighter. The convex plug 10 and the concave socket 11 are plugged into each other, and a rubber strip is provided on the convex plug 10. The plug-in and the rubber strip arranged inside achieve a better sealing effect. The connector 9 is a buckle, which is convenient for opening and locking the semicircular piece 7. The compactor includes: a cylinder 15 and a pressure plate 16. The diameter of the pressure plate 16 is smaller than the diameter of the inner cavity of the cylindrical sample tube 3. A sealing strip 17 is installed around the pressure plate 16. The cylinder 15 drives the pressure plate 16 to advance into the cylindrical sample tube 3 to extrude the test sample.

[0022] Working principle: The heavy metal contaminated soil sample is in direct contact with the steel mold, which is prone to chemical reaction and changes the surface characteristics of the sample. The cylindrical sample tube 3 includes the same semicircular pieces 7 on the left and right. The inner cavity side wall of the semicircular piece 7 is installed with a plastic inner wall 6. A buckle 19 is installed in the middle of the inner cavity side wall of the semicircular piece 7. A latch 18 is installed on the rear side wall of the plastic inner wall 6. The buckle 19 and the latch 18 are plugged in. The plastic inner wall 6 is an engineering plastic and can be easily disassembled by plugging the buckle 19 and the latch 18. The fixed cylinder is in a fixed position after the device is used. The interior is not easy to clean, which affects the secondary use. A hinge 8 is rotatably installed between the rear ends of the left and right identical semicircular pieces 7. The two semicircular pieces 7 are combined to form a cylindrical sample tube 3. A connector 9 is installed on the front side wall of the semicircular piece 7. The connector 9 is convenient for opening the cylindrical sample tube 3 to clean the interior, and it does not affect the secondary experiment after cleaning. A convex plug 10 and a concave socket 11 are respectively provided between the front ends of the left and right identical semicircular pieces 7. The convex plug 10 and the concave socket 11 are plugged into each other to more firmly improve the sealing, which is convenient for disassembly and cleaning.

[0023] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0024] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preparing environmental geotechnical engineering samples, comprising a base (1), characterized in that: An operating button (2) is provided on the front side wall of the base (1), a cylindrical sample tube (3) is installed in the middle of the top surface of the base (1), a top cover (4) is threadedly installed on the top surface of the cylindrical sample tube (3), and the cylindrical sample tube (3) includes left and right identical semicircular pieces (7), a hinge (8) is rotatably installed between the rear ends of the left and right identical semicircular pieces (7), and a convex plug (10) and a concave socket (10) are respectively provided between the front ends of the left and right identical semicircular pieces (7). 1), a connector (9) is installed on the front side wall of the semicircular piece (7), a plastic inner wall (6) is installed on the inner cavity side wall of the semicircular piece (7), a buckle (19) is installed in the middle of the inner cavity side wall of the semicircular piece (7), a latch (18) is installed on the rear side wall of the plastic inner wall (6), the buckle (19) and the latch (18) are plugged into each other, a groove (14) is opened in the middle of the top surface of the base (1), and a compactor is installed in the inner cavity of the groove (14).

2. The device for preparing environmental geotechnical engineering samples according to claim 1, characterized in that: A handle (5) is installed on the top surface of the top cover (4), an outer thread (13) is provided on the bottom of the top cover (4), an inner thread (12) is provided on the top of the inner cavity of the semicircular piece (7), and the inner thread (12) and the outer thread (13) are threadedly connected.

3. The device for preparing environmental geotechnical engineering samples according to claim 1, characterized in that: The male plug (10) and the female socket (11) are plugged into each other, a rubber strip is provided on the male plug (10), and the connector (9) is a buckle.

4. The device for preparing environmental geotechnical engineering samples according to claim 1, characterized in that: The compactor comprises: a cylinder (15) and a pressing plate (16); the diameter of the pressing plate (16) is smaller than the diameter of the inner cavity of the cylindrical sample tube (3); and a sealing strip (17) is installed around the pressing plate (16).

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