Hollow cylinder torsional shear sample preparation device adopting pneumatic knocking hammer for vibration

Abstract

The utility model provides a hollow cylinder torsional shear sample preparation device adopting a pneumatic knocking hammer for vibrating. The hollow cylinder torsional shear sample preparation device comprises a sample preparation mold assembly and a pneumatic knocking hammer assembly, the sample preparation mold assembly comprises a mold base and an outer-layer mold cylinder, and the outer-layer mold cylinder is fixed on the base; the pneumatic knocking hammer assembly comprises a pneumatic knocking hammer base and a pneumatic knocking hammer shell, the pneumatic knocking hammer base is fixed to the outer layer mold cylinder, the pneumatic knocking hammer shell is fixed to the pneumatic knocking hammer base, and a pneumatic knocking hammer air inlet is formed in the pneumatic knocking hammer shell. According to the utility model, the knocking force of the pneumatic knocking hammer is controlled through the air compressor, so that the compactness of a sample can be accurately controlled.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical laboratory testing technology, specifically relating to a hollow cylindrical torsion shear sample preparation device that uses a pneumatic hammer for vibration. Background Technology

[0002] The hollow cylinder torsion shear test aims to simulate the actual stress path of soil elements under load. It can consider the influence of complex stress conditions such as principal stress axis rotation, changes in the middle principal stress coefficient, and cyclic sphere stress, and falls under the category of laboratory geotechnical testing. In the preparation of samples for the hollow cylinder torsion shear test of sand, the sand rain method is commonly used. However, traditional sample preparation methods rely on manual operation to control the amount of sand sprinkled and the number of vibrations, making it difficult to accurately control the compaction of each sand layer. Therefore, to more accurately control the compaction of sand samples, it is necessary to effectively control the initial stress direction by controlling the mass of each sand layer, the number of vibrations, and the magnitude of the vibration force.

[0003] A search revealed that Chinese patent application number CN201810042376.7 discloses an inclined hollow cylindrical sand sample preparation device, which includes a molding module (comprising an inner and outer mold cylinder), an automatic sample throwing module (including a funnel-shaped feeding end and a connected discharge end), and a power module (providing power to cause relative rotation between the molding module and the automatic throwing module). This device solves the problems of existing hollow cylindrical torsion shear sample preparation devices being unable to control the sand deposition surface and the large amount of manual labor required for throwing.

[0004] However, this device still has certain drawbacks: its striking hammer cannot precisely control the number of vibrations and the striking force. Although the above-mentioned technical solution uses motor control, which improves sample preparation efficiency to some extent, the method of driving the striking hammer to strike the mold shell through transmission makes it difficult to precisely control the number of vibrations and the striking force, which will affect subsequent sample preparation work. Moreover, the rotation of the inner and outer mold cylinders driven by the conveyor belt will inevitably cause disturbance to the sample. Therefore, it is essential to propose a more stable hollow cylindrical torsion shear sample preparation device. Utility Model Content

[0005] The purpose of this invention is to provide a hollow cylindrical torsion shear sample preparation device that uses a pneumatic hammer for vibration, which can more accurately control the vibration effect and thus improve the accuracy of sample compaction control.

[0006] To solve the above-mentioned technical problems, the technical solution proposed in this application is as follows:

[0007] This invention provides a hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration, comprising a sample preparation mold assembly and a pneumatic hammer assembly;

[0008] The sample preparation mold assembly includes a mold base and an outer mold cylinder, wherein the outer mold cylinder is fixed on the base;

[0009] The pneumatic hammer assembly includes a pneumatic hammer base and a pneumatic hammer shell. The pneumatic hammer base is fixed on the outer mold cylinder, and the pneumatic hammer shell is fixed on the pneumatic hammer base. The pneumatic hammer air inlet is located on the pneumatic hammer shell.

[0010] Furthermore, the sample preparation mold assembly also includes an inner mold cylinder, which is concentrically arranged with the outer mold cylinder and is also fixed on the base.

[0011] Furthermore, it also includes a funnel installed between the inner mold cylinder and the outer mold cylinder.

[0012] Furthermore, the sample preparation mold assembly also includes a mold support shaft, which is located at the center of the inner mold cylinder and the outer mold cylinder, and the mold support shaft is fixed on the base.

[0013] Furthermore, the air inlet of the pneumatic hammer is used to connect to an air compressor.

[0014] Furthermore, both the inner mold cylinder and the outer mold cylinder are cylindrical.

[0015] Compared with the prior art, this application achieves the following beneficial technical effects:

[0016] This invention, through the synergistic effect of the aforementioned components, utilizes a pneumatic hammer for vibration, enabling precise control of the vibration effect, improving sample preparation quality and efficiency, while ensuring the stability and reliability of the sample preparation process. The design of the inner and outer mold cylinders, along with the rational layout of the various components, makes sample preparation more accurate and convenient. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure according to an embodiment of the present utility model is shown;

[0019] Figure 2 A schematic diagram of a funnel according to an embodiment of the present invention is shown.

[0020] Figure 3A schematic diagram of a sample preparation mold according to an embodiment of the present invention is shown;

[0021] Figure 4 A schematic diagram of a pneumatic hammer structure according to an embodiment of the present invention is shown.

[0022] In the diagram: 110, funnel; 210, base; 220, outer mold cylinder; 230, inner mold cylinder; 240, mold support shaft; 310, pneumatic hammer base; 320, pneumatic hammer shell; 330, pneumatic hammer air inlet. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-4 This utility model provides an embodiment: a hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration, comprising a sample preparation mold assembly and a pneumatic hammer assembly;

[0025] The sample preparation mold assembly includes a mold base 210 and an outer mold cylinder 220, wherein the outer mold cylinder 220 is fixed on the base 210;

[0026] The pneumatic hammer assembly includes a pneumatic hammer base 310 and a pneumatic hammer housing 320. The pneumatic hammer base 310 is fixed on the outer mold cylinder 220, and the pneumatic hammer housing 320 is fixed on the pneumatic hammer base 310. The pneumatic hammer air inlet 330 is disposed on the pneumatic hammer housing 320.

[0027] The sample preparation mold assembly also includes an inner mold cylinder 230, which is concentrically arranged with the outer mold cylinder 220 and is also fixed on the base 210.

[0028] It also includes a funnel 110, which is installed between the inner mold cylinder 230 and the outer mold cylinder 220.

[0029] The sample preparation mold assembly also includes a mold support shaft 240, which is located at the center of the inner mold cylinder 230 and the outer mold cylinder 220, and is fixed on the base 210.

[0030] The air inlet 330 of the pneumatic hammer is used to connect to an air compressor.

[0031] Both the inner mold cylinder 230 and the outer mold cylinder 220 are cylindrical.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration, characterized in that: Includes sample preparation mold assembly and pneumatic hammer assembly; The sample preparation mold assembly includes a mold base (210) and an outer mold cylinder (220), wherein the outer mold cylinder (220) is fixed on the base (210); The pneumatic hammer assembly includes a pneumatic hammer base (310) and a pneumatic hammer shell (320). The pneumatic hammer base (310) is fixed on the outer mold cylinder (220), the pneumatic hammer shell (320) is fixed on the pneumatic hammer base (310), and the pneumatic hammer air inlet (330) is disposed on the pneumatic hammer shell (320).

2. The hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration as described in claim 1, characterized in that: The sample preparation mold assembly also includes an inner mold cylinder (230), which is concentrically arranged with the outer mold cylinder (220) and is also fixed on the base (210).

3. The hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration as described in claim 2, characterized in that: It also includes a funnel (110) installed between the inner mold cylinder (230) and the outer mold cylinder (220).

4. The hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration as described in claim 2, characterized in that: The sample preparation mold assembly also includes a mold support shaft (240), which is located at the center of the inner mold cylinder (230) and the outer mold cylinder (220), and the mold support shaft (240) is fixed on the base (210).

5. The hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration as described in claim 1, characterized in that: The air inlet (330) of the pneumatic hammer is used to connect to the air compressor.

6. The hollow cylindrical torsion shear sample preparation device using a pneumatic hammer for vibration as described in claim 2, characterized in that: Both the inner mold cylinder (230) and the outer mold cylinder (220) are cylindrical.

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