Indoor table type vane shear tester capable of automatically penetrating and shearing

Abstract

The utility model discloses an indoor table type vane shear tester capable of automatically penetrating and shearing. The indoor table type vane shear tester comprises a soil sampling cylinder and a vane shear plate head capable of entering the soil sampling cylinder along the opening direction of the soil sampling cylinder, the vane shear plate head is arranged on an up-down sliding device driven by a first stepping motor and can move up and down along the opening direction of the soil sampling cylinder; the up-down sliding device comprises a ball screw sliding guide rail parallel to the opening direction of the soil sampling cylinder, and a cantilever beam structural part which is arranged on the ball screw sliding guide rail and can be driven by the ball screw sliding guide rail to move up and down; the cantilever beam structural member is provided with a second stepping motor for driving the vane shear plate head to rotate; and an output shaft of the second stepping motor is coaxial with the center line of the opening of the soil sampling cylinder. According to the utility model, the vertical moving speed and distance of the vane shear plate head and the rotating speed and angle of the vane shear plate head can be accurately controlled, and the vane shear test accuracy and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cross board shearing test technical field, especially indoor table type cross board shearing tester of automatic penetration shearing. BACKGROUND

[0002] Cross board shearing test is a kind of test for determining the undrained shear strength and sensitivity of saturated soft clay with cross board, and belongs to one kind of in-situ test of soil body.

[0003] The existing cross board shearing test device usually includes a cross board shearing head capable of entering the soil sampling cylinder along the opening of the soil sampling cylinder to shear the sample in the soil sampling cylinder, a mechanism for driving the cross board shearing head to move up and down along the opening direction of the soil sampling cylinder, and a mechanism for driving the cross board shearing head to rotate.

[0004] However, the existing cross board shearing test device, such as the cross board shearing tester disclosed in the above-mentioned patent, cannot accurately control the speed and distance of the cross board shearing head moving up and down, and the speed and angle of the cross board shearing head rotating, which are usually determined by the experience of the operator. Figure 1

[0005] The defects of the above-mentioned cross board shearing test device relying on the experience of the operator cause various deviations in the test results due to human factors, and in order to reduce the influence of deviations on the test results, the test frequency is usually increased to take the average value to compensate.

[0006] However, increasing the test frequency to take the average value can only reduce the various deviations caused by human factors, which increases the test cost and the working intensity of the operator.

[0007] Therefore, how to improve the accuracy and reliability of cross board shearing test and improve the efficiency of obtaining test data has become a technical problem to be solved by the technical personnel in the field. INVENTION CONTENTS

[0008] In view of the above-mentioned defects of the prior art, the utility model provides an indoor table type cross board shearing tester for automatic penetration shearing, which realizes the purpose of improving the accuracy and reliability of cross board shearing test and improving the efficiency of obtaining test data.

[0009] To achieve the above-mentioned purpose, the utility model discloses an indoor table type cross board shearing tester for automatic penetration shearing, which includes a soil sampling cylinder and a cross board shearing head capable of entering the soil sampling cylinder along the opening direction of the soil sampling cylinder.

[0010] ​The cross plate shearing plate head is arranged on up-down sliding devices driven by the first stepping motor and can move up and down along the opening direction of the soil sampling tube.

[0011] The up-down sliding devices comprise ball screw sliding guides arranged in parallel with the opening direction of the soil sampling tube, and cantilever beam structural members arranged on the ball screw sliding guides and driven by the ball screw sliding guides to move up and down.

[0012] The cantilever beam structural members are provided with the second stepping motor for driving the cross plate shearing plate head to rotate.

[0013] The output shaft of the second stepping motor is coaxial with the center line of the opening of the soil sampling tube.

[0014] Preferably, the output shaft of the second stepping motor is provided with a torsion sensor.

[0015] Preferably, the soil sampling tube and the up-down sliding devices are fixed on the same base.

[0016] Preferably, the base is provided with a base fixing sleeve for fixing the soil sampling tube and a base for fixing the ball screw sliding guide.

[0017] More preferably, the base is in the shape of a Chinese character "Kang", which is provided with the ball screw sliding guide and the first stepping motor in the space surrounded by the base and the base fixing sleeve.

[0018] Preferably, the first stepping motor, the second stepping motor and the torsion sensor are connected with an embedded single-chip microcomputer, which provides data to the embedded single-chip microcomputer and receives working instructions to form digital control.

[0019] The present application has the following beneficial effects:

[0020] The present application adopts two stepping motors to drive the cross plate shearing plate head to move up and down along the opening direction of the soil sampling tube and rotate, the speed and distance of the movement of the cross plate shearing plate head and the speed and angle of the rotation of the cross plate shearing plate head can be accurately controlled, the accuracy and reliability of the cross plate shearing test are improved, and the efficiency of obtaining test data is improved.

[0021] The concept, specific structure and technical effects of the present application will be further described below with reference to the drawings, so as to fully understand the purpose, features and effects of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The drawing shows the structure of the existing cross plate shearing test device.

[0023] Figure 2 The total assembly structure schematic view of one embodiment of the present application is shown.

[0024] Figure 3 The side structure schematic view of one embodiment of the present application is shown. DETAILED DESCRIPTION

[0025] Embodiment

[0026] As shown in Figure 2 and Figure 3 The indoor table type vane shear tester of automatic penetration shear includes a soil sampling cylinder 1 and a vane shear head 2 capable of entering the soil sampling cylinder 1 along the opening direction of the soil sampling cylinder 1.

[0027] The vane shear head 2 is arranged on the up-down sliding device driven by the first stepper motor 3 and is capable of moving up and down along the opening direction of the soil sampling cylinder 1.

[0028] The up-down sliding device includes a ball screw sliding guide rail 4 arranged in parallel with the opening direction of the soil sampling cylinder 1 and a cantilever beam structural member 5 arranged on the ball screw sliding guide rail 4 and capable of being driven by the ball screw sliding guide rail 4 to move up and down.

[0029] The cantilever beam structural member 5 is provided with a second stepper motor 6 for driving the vane shear head 2 to rotate.

[0030] The output shaft of the second stepper motor 6 is coaxial with the center line of the opening of the soil sampling cylinder 1.

[0031] In actual application, the first stepper motor 3 drives the cantilever beam structural member 5 to move through the ball screw sliding guide rail 4, the second stepper motor 6 and the vane shear head 2 are arranged on the cantilever beam structural member 5, and the vane shear head 2 can be moved up and down by the first stepper motor and inserted into the sample placed in the soil sampling cylinder 1.

[0032] The second stepper motor 6 is connected to drive the vane shear head 2 to generate torsional shear stress in the soil body.

[0033] In some embodiments, the output shaft of the second stepper motor 6 is provided with a torsion sensor 7.

[0034] In some embodiments, the soil sampling cylinder 1 and the up-down sliding device are fixed on the same base 8.

[0035] In some embodiments, the base 8 is provided with a base fixing sleeve 9 for fixing the soil sampling cylinder 1 and a base 10 for fixing the ball screw sliding guide rail 4.

[0036] In some embodiments, the base 10 is in the shape of a "H" and is provided with a ball screw sliding guide 4, and a first stepping motor 3 is arranged in the space surrounded by the base 10 and the base 8; the output shaft of the first stepping motor 3 is connected with the ball screw sliding guide 4 and extends upward from the base 10.

[0037] In some embodiments, the first stepping motor 3, the second stepping motor 6 and the torque sensor 7 are connected with an embedded single-chip microcomputer, provide data to the embedded single-chip microcomputer and accept working instructions to form digital control.

[0038] The above describes the preferred embodiments of the present application in detail. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the present application shall be within the protection scope defined by the claims.

Claims

1. An indoor bench vane shear tester for automatic penetration and shear, comprising a soil sampling cylinder (1) and a vane shear plate head (2) capable of entering the soil sampling cylinder (1) along the opening direction of the soil sampling cylinder (1); characterized in that, The vane shear plate head (2) is arranged on an up-and-down sliding device driven by a first stepping motor (3) and can move up and down along the opening direction of the soil sampling cylinder (1); The up-and-down sliding device includes a ball screw sliding guide rail (4) arranged parallel to the opening direction of the soil sampling cylinder (1), and a cantilever beam structural member (5) arranged on the ball screw sliding guide rail (4) and capable of being driven by the ball screw sliding guide rail (4) to move up and down; The cantilever beam structural member (5) is provided with a second stepping motor (6) for driving the vane shear plate head (2) to rotate; The output shaft of the second stepping motor (6) is coaxial with the center line at the opening of the soil sampling cylinder (1).

2. The indoor benchtop vane shear tester with automatic penetration shearing as described in claim 1, characterized in that, The output shaft of the second stepping motor (6) is provided with a torque sensor (7).

3. The indoor benchtop vane shear tester with automatic penetration shearing as described in claim 1, characterized in that, The soil sampling cylinder (1) and the up-and-down sliding device are fixed on the same base (8).

4. The indoor benchtop vane shear tester with automatic penetration shearing according to claim 3, characterized in that, The base (8) is provided with a base fixing seat sleeve (9) for fixing the soil sampling cylinder (1) and a base (10) for fixing the ball screw sliding guide rail (4).

5. The indoor benchtop vane shear tester with automatic penetration shearing according to claim 4, characterized in that, The base (10) is in an "L" shape, with the ball screw sliding guide rail (4) arranged on it, and the first stepping motor (3) is arranged in the space surrounded by the base (10) and the base (8); the output shaft of the first stepping motor (3) passes upward through the base (10) and is connected to the ball screw sliding guide rail (4).

6. The indoor benchtop vane shear tester with automatic penetration shearing according to claim 2, characterized in that, The first stepping motor (3), the second stepping motor (6) and the torque sensor (7) are all connected to an embedded single-chip microcomputer, providing data to the embedded single-chip microcomputer and receiving working instructions to form digital control.

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