Automatic calibration device for vane shear apparatus

Abstract

The utility model relates to an automatic calibration device for a vane shear apparatus, which comprises a workbench, a power source and a clamping mechanism used for clamping the vane shear apparatus are fixed on the workbench, a main shaft of the power source is connected with a switching tool through a standard torque sensor, the switching tool is connected with a main shaft or a vane head of the vane shear apparatus, and the standard torque sensor is connected with the switching tool. The standard torque sensor is electrically connected with the display terminal. The beneficial effects are that the device is provided with a good man-machine interaction interface, is simple in operation, is high in electronization degree, is remarkably improved in measurement range compared with a lever weight, can achieve the manual input setting of a calibration point according to the needs, and can achieve the measurement, loading, control, display and recording functions of torque.

Description

Technical Field

[0001] The utility model relates to the technical field of calibration of geotechnical testing equipment, in particular to an automatic calibration device for a cross-plate shearing instrument. Background Art

[0002] The cross-plate shear tester is a commonly used geotechnical test instrument used to measure the shear strength of materials such as soil and mud. However, the existing cross-plate shear tester is prone to deviations during use due to long-term use or transportation, operation and other factors, and needs to be calibrated. At present, the calibration method is mostly loaded in the form of lever weights. For example, the patent with application number: 201710654200 discloses an indoor cross-plate shear tester verification device. This technical solution performs loading and calibration by manually adding weights. The manual labor intensity is high, the measurement range is limited, the calibration point is a fixed point, the efficiency is low, and errors are prone to occur. Therefore, it is necessary to develop an automated device for calibrating the cross-plate shear tester, which is of great practical significance for improving the calibration efficiency and accuracy of the cross-plate shear tester. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an automatic calibration device for a cross plate shearing instrument to overcome the deficiencies in the above-mentioned prior art.

[0004] The utility model provides a technical solution to the above technical problems as follows: an automatic calibration device for a cross-plate shearing instrument, comprising: a workbench, a power source fixed on the workbench and a clamping mechanism for clamping the cross-plate shearing instrument, the main shaft of the power source is connected to a transfer tool via a standard torque sensor, the transfer tool is connected to the main shaft or cross-plate head of the cross-plate shearing instrument, and the standard torque sensor is electrically connected to a display terminal.

[0005] On the basis of the above technical solution, the present invention can also be improved as follows.

[0006] Furthermore, the end of the adapter tooling which is away from the standard torque sensor has a cross groove along its rotation axis, and the cross plate head of the cross plate shear instrument is inserted into the cross groove on the adapter tooling.

[0007] Furthermore, one end of the adapter tooling away from the standard torque sensor has a threaded hole along its rotation axis, and the main shaft of the cross plate shear instrument is threadedly connected to the threaded hole on the adapter tooling.

[0008] Furthermore, the power source includes: a motor, the motor is fixed on the workbench via a motor seat, and the main shaft of the motor is connected to the adapter via a standard torque sensor; the motor, the standard torque sensor and the display terminal are electrically connected to the control system respectively.

[0009] Furthermore, the clamping mechanism adopts a quick-press clamp.

[0010] The beneficial effects of the utility model are: it has a good human-computer interaction interface, simple operation, a high degree of electronicization, a measurement range significantly improved compared to lever weights, the calibration points can be manually input and set as needed, and the torque measurement, loading, control, display, and recording functions can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a structural diagram of the automatic calibration device of the cross plate shearing instrument in the utility model;

[0012] Figure 2 It is a partial structural diagram of the automatic calibration device of the cross plate shearing instrument in the utility model.

[0013] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0014] 1. Workbench, 2. Power source, 210. Motor, 220. Motor seat, 3. Clamping mechanism, 4. Standard torque sensor, 5. Adapter, 510. Cross slot, 6. Cross plate shearing instrument, 610. Cross plate head. DETAILED DESCRIPTION

[0015] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0016] Example 1

[0017] like Figure 1 , Figure 2 As shown, an automatic calibration device for a cross plate shearing instrument comprises: a workbench 1, a power source 2 is fixed on the workbench 1, a clamping mechanism 3 for clamping a cross plate shearing instrument 6 is also fixed on the workbench 1, the main shaft of the power source 2 is connected to a transfer fixture 5 via a standard torque sensor 4, and the transfer fixture 5 is connected to the main shaft of the cross plate shearing instrument 6, or the transfer fixture 5 is connected to a cross plate head 610 of the cross plate shearing instrument 6. Which method is selected is determined according to the following conditions:

[0018] If the cross plate head 610 of the cross plate shearing instrument 6 can be disassembled, the adapter fixture 5 is connected to the main shaft of the cross plate shearing instrument 6 through threads. If the cross plate head 610 of the cross plate shearing instrument 6 cannot be disassembled, the adapter fixture 5 is connected to the cross plate head 610 of the cross plate shearing instrument 6. This situation is shown in the schematic diagram of this embodiment.

[0019] The standard torque sensor 4 is electrically connected to the display terminal;

[0020] When in use, the cross-plate shearing instrument 6 to be calibrated is placed on the workbench 1, clamped by the clamping mechanism 3, and then the cross-plate shearing instrument 6 and the standard torque sensor 4 are connected in series by the adapter tool 5, and the torque value to be calibrated is set on the display terminal. After confirming the loading, the power source 2 drives the standard torque sensor 4 and the adapter tool 5 to rotate axially to load the cross-plate shearing instrument 6 with torque. After reaching the calibration value, the power source 2 remains stable, reads the display value of the cross-plate shearing instrument 6 and the measurement value of the standard torque sensor 4 displayed on the display terminal, and the measurement value of the standard torque sensor 4 is used as the standard value. The display value of the cross-plate shearing instrument 6 is recorded on the display terminal, and then loaded to the next calibration point, and the standard torque value and the display value of the cross-plate shearing instrument 6 are recorded in turn. When the cross-plate shearing instrument 6 reaches the upper limit of the torque, the torque value is unloaded in turn according to the calibration point. After unloading to the corresponding calibration point, the display value of the cross-plate shearing instrument 6 is read and recorded, and the value is used as the return value until the torque value returns to zero, that is, the automatic calibration process is completed;

[0021] The technical solution disclosed by the utility model has a good human-computer interaction interface, simple operation, high degree of electronicization, and a significantly improved measurement range compared to lever weights. The calibration points can be manually input and set as needed, and the torque measurement, loading, control, display, and recording functions can be realized.

[0022] Example 2

[0023] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0024] The end of the adapter 5 facing away from the standard torque sensor 4 has a cross groove 510 along its rotation axis, and the cross plate head 610 of the cross plate shear instrument 6 is inserted into the cross groove 510 on the adapter 5. At this time, the adapter 5 is suitable for the situation where the cross plate head 610 of the cross plate shear instrument 6 cannot be removed.

[0025] Or: the end of the adapter fixture 5 facing away from the standard torque sensor 4 has a threaded hole along its rotation axis, and the main shaft of the cross-plate shear instrument 6 is threadedly connected to the threaded hole on the adapter fixture 5. At this time, the adapter fixture 5 is suitable for the situation where the cross-plate head 610 of the cross-plate shear instrument 6 can be disassembled.

[0026] Example 3

[0027] like Figure 1 As shown, this embodiment is a further improvement on the basis of Embodiment 1 or 2, and the details are as follows:

[0028] The power source 2 includes: a motor 210, which is fixed on the workbench 1 via a motor base 220. The main shaft of the motor 210 is connected to the adapter tooling 5 via a standard torque sensor 4. The motor 210, the standard torque sensor 4 and the display terminal are electrically connected to the control system respectively. After the corresponding instructions are input into the display terminal, the control system executes the corresponding instructions to control the start and stop, forward and reverse rotation of the motor 210, thereby completing automatic calibration.

[0029] Example 4

[0030] like Figure 1 As shown, this embodiment is a further improvement on the basis of Embodiment 1, 2 or 3, and the details are as follows:

[0031] The clamping mechanism 3 preferably adopts a quick-press clamp. The quick-press clamp is a prior art, so its structure is not described in detail here. The cross-plate shearing instrument 6 is pressed onto the workbench 1 by driving the connecting rod through the handle.

[0032] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An automatic calibration device for a cross plate shearing instrument, characterized in that: include: A workbench (1) is provided, on which a power source (2) and a clamping mechanism (3) for clamping a cross-plate shearing instrument (6) are fixed, the main shaft of the power source (2) is connected to a transfer fixture (5) via a standard torque sensor (4), the transfer fixture (5) is connected to the main shaft or the cross-plate head (610) of the cross-plate shearing instrument (6), and the standard torque sensor (4) is electrically connected to a display terminal.

2. According to claim 1, the automatic calibration device for a cross plate shearing instrument is characterized in that: The end of the adapter tool (5) facing away from the standard torque sensor (4) has a cross groove (510) along its rotation axis, and the cross plate head (610) of the cross plate shearing instrument (6) is inserted into the cross groove (510) on the adapter tool (5).

3. The automatic calibration device for a cross plate shearing instrument according to claim 1, characterized in that: The end of the adapter tool (5) that faces away from the standard torque sensor (4) has a threaded hole along its rotation axis, and the main shaft of the cross plate shear instrument (6) is threadedly connected to the threaded hole on the adapter tool (5).

4. The automatic calibration device for a cross plate shearing instrument according to claim 1, characterized in that: The power source (2) comprises: a motor (210), the motor (210) being fixed on a workbench (1) via a motor base (220), the main shaft of the motor (210) being connected to a transfer tool (5) via a standard torque sensor (4); the motor (210), the standard torque sensor (4) and the display terminal being electrically connected to a control system respectively.

5. The automatic calibration device for a cross plate shearing instrument according to claim 1, characterized in that: The clamping mechanism (3) adopts a quick-press clamp.

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