Shearing box with alignment detection function

Abstract

The utility model provides a shear box with an alignment detection function. The shear box comprises a base, a lower shear box and an upper shear box which are sequentially arranged from bottom to top, an upper distance measuring sensor and a lower distance measuring sensor are arranged on two adjacent inner walls of the base and are used for directly measuring the distance between the upper shear box and the inner wall of the base and between the lower shear box and the inner wall of the base; the upper distance measuring sensor is positioned right above the lower distance measuring sensor; the base is further provided with corresponding indicator lamps, and when the distance difference measured by the upper distance measuring sensor and the lower distance measuring sensor on the same side exceeds a preset range, the corresponding indicator lamps are turned on. The distance measuring sensor is arranged to measure the relative positions of the upper shear box and the lower shear box, whether the upper shear box and the lower shear box are aligned or not is judged, and the indicator light prompts an operator to calibrate, so that the shear box inspection times are greatly reduced, the test steps are simplified, and the efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil sample test equipment, in particular to a shear box with an alignment detection function. Background Technique

[0002] The four-link strain-controlled direct shear apparatus is a geotechnical test equipment used to determine the shear strength of soil. By applying horizontal shear force to four specimens under different vertical pressures, the shear stress at the time of soil sample failure is measured, and then the shear strength coefficient, internal friction angle, and cohesion of the soil are determined according to Coulomb's law. This instrument is widely used in direct shear tests of different soil bodies such as cohesive soil, fine-grained soil, and sandy soil.

[0003] The core structure of the four-link strain-controlled direct shear apparatus mainly includes the following parts: a load cell and a shear system, a vertical loading system, a sample box and a shear box, a transmission and control system, and a data acquisition and processing system. Among them, the shear box is a key component in the shear test, and its structural design and function have an important impact on the accuracy of the test results.

[0004] The shear box includes a base, a lower shear box, an upper shear box, and a pressure cover. In the shear test, the specific usage steps of the shear box are as follows: First, place the lower shear box on the base and put a permeable stone in it; use pins or bolts to fix the upper and lower shear boxes together to ensure their positions are stable and aligned; place the ring knife containing the sample with the flat mouth downwards, align it with the opening of the shear box, and then slowly push the sample into the shear box; install the pressure cover above the sample and prepare to apply vertical pressure.

[0005] In the shear test, if the upper and lower shear boxes are not aligned, it will have a series of adverse effects on the test results: The misaligned shear box will cause the shear plane to shift, making the distribution of the shear force on the sample uneven, with some areas being subjected to excessive shear force while others are smaller, and it may also cause excessive stress in some local areas, thereby accelerating the failure of the sample; resulting in deviations in the test results and even misleading subsequent analysis and judgment; causing additional impact and load on the test equipment, thereby increasing the risk of equipment damage.

[0006] In the prior art, bolts are set to align and fix the upper and lower shear boxes together to prevent the shear box from shifting or misaligning during the shear process. However, during long-term use or multiple tests, the relative positions of the upper and lower shear boxes may become loose and displaced due to reasons such as vibration, wear, or improper operation. Before each test, it is necessary to check and calibrate the alignment of the shear box to ensure its accuracy and reliability.

[0007] Checking the alignment before each test makes the test steps numerous and the efficiency is limited. Therefore, it is necessary to improve the prior art. Summary of the Utility Model

[0008] The utility model provides a shearing box with an alignment detection function to solve the above problems.

[0009] One technical solution adopted by the utility model is: to provide a shearing box with an alignment detection function, including: a base, a lower shearing box and an upper shearing box arranged in sequence from bottom to top;

[0010] Upper ranging sensors and lower ranging sensors are arranged on two adjacent inner walls of the base. The measuring ends of the upper ranging sensors point vertically to the outer wall of the upper shearing box, and the measuring ends of the lower ranging sensors point vertically to the outer wall of the lower shearing box, for directly measuring the distances from the upper and lower shearing boxes to the inner wall of the base;

[0011] The upper ranging sensor on the same inner wall is directly above the lower ranging sensor to ensure that the relative positions of the upper and lower shearing boxes can be accurately judged;

[0012] Corresponding indicator lights are also arranged on the base. The upper ranging sensors, lower ranging sensors and indicator lights are all electrically connected to the control system. When the distance difference measured by the upper and lower ranging sensors on the same side exceeds the preset range, the corresponding indicator light lights up, prompting the operator to calibrate the alignment of the shearing box. Therefore, there is no need to check and calibrate before each test, which can greatly improve the accuracy and efficiency of the direct shear apparatus in detecting the alignment state of the upper and lower shearing boxes.

[0013] Further, the upper ranging sensors and the lower ranging sensors adopt laser ranging sensors or ultrasonic sensors.

[0014] Further, the control system is also connected with an alarm. When the distance difference measured by the upper and lower ranging sensors on the same side exceeds the preset range, the alarm gives an alarm to enhance the reminder to the operator.

[0015] Further, the control system is also connected with a display screen for real-time displaying the position differences between the upper shearing box and the lower shearing box in the shearing direction and perpendicular to the shearing direction, so as to better guide the operator to carry out calibration.

[0016] Another technical solution adopted by the utility model is: to provide a shearing box with an alignment detection function, including: a base, a lower shearing box and an upper shearing box arranged in sequence from bottom to top;

[0017] On the outer sides of two adjacent side walls of the base, a distance measurement sensing system is provided. The distance measurement sensing system includes a bracket and an upper distance measurement sensor and a lower distance measurement sensor arranged on the bracket. A measurement window is provided on the side wall, such that the measurement end of the upper distance measurement sensor vertically points to the outer wall of the upper shear box, and the measurement end of the lower distance measurement sensor vertically points to the outer wall of the lower shear box;

[0018] The upper distance measurement sensor is located directly above the lower distance measurement sensor;

[0019] Corresponding indicator lights are further provided on the bracket. The upper distance measurement sensor, the lower distance measurement sensor, and the indicator lights are all electrically connected to the control system. When the distance difference measured by the upper distance measurement sensor and the lower distance measurement sensor exceeds a preset range, the indicator lights turn on, prompting the operator to calibrate the alignment of the shear box.

[0020] Furthermore, the upper distance measurement sensor and the lower distance measurement sensor are both connected to the bracket through a locking device and can be adjusted up and down to adapt to different shear box sizes.

[0021] The beneficial effects of a shear box with an alignment detection function according to the present utility model are as follows:

[0022] 1. By providing two pairs of distance measurement sensors to measure the relative positions of the upper and lower shear boxes and determine whether they are aligned, when the upper and lower shear boxes are not aligned, the operator is prompted by the indicator lights to perform calibration, greatly reducing the number of inspections of the shear box, simplifying the test steps, and improving efficiency. Description of the Drawings

[0023] Figure 1 is the front view of a shear box with an alignment detection function according to the first embodiment of the present utility model;

[0024] Figure 2 is the top view of a shear box with an alignment detection function according to the first embodiment of the present utility model;

[0025] Figure 3 is the front view of a shear box with an alignment detection function according to the second embodiment of the present utility model;

[0026] Figure 4 is the top view of a shear box with an alignment detection function according to the second embodiment of the present utility model;

[0027] The marks of each component in the drawings are as follows: 1. Base, 2. Lower shear box, 3. Upper shear box, 4. Upper distance measurement sensor, 5. Lower distance measurement sensor, 6. Indicator light, 7. Bracket, 8. Measurement window. Detailed Embodiment

[0028] The following describes in detail the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "horizontal", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present invention and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0030] Please refer to Figure 1 and Figure 2 , the first embodiment of the present invention provides a shear box with an alignment detection function, including: a base 1, a lower shear box 2, and an upper shear box 3 arranged in sequence from bottom to top;

[0031] Upper distance sensors 4 and lower distance sensors 5 are embedded on two adjacent inner walls of the base 1. The measuring ends of the upper distance sensors 4 point vertically to the outer wall of the upper shear box 3, and the measuring ends of the lower distance sensors 5 point vertically to the outer wall of the lower shear box 2. The upper distance sensors 4 are used to directly measure the distance from the upper shear box 3 to the inner wall of the base 1, and the lower distance sensors 5 are used to directly measure the distance from the lower shear box 2 to the inner wall of the base 1;

[0032] The upper distance sensors 4 located on the same inner wall are directly above the lower distance sensors 5 to ensure that the relative positions of the upper and lower shear boxes 2 can be accurately judged;

[0033] The base 1 is also provided with corresponding indicator lights 6. The upper distance sensors 4, the lower distance sensors 5, and the indicator lights 6 are all electrically connected to the control system. When the distance difference measured by the upper distance sensors 4 and the lower distance sensors 5 on the same side exceeds the preset range, the corresponding indicator light 6 lights up, prompting the operator to calibrate the alignment of the shear box. Therefore, it is not necessary to check and calibrate before each test, which can greatly improve the accuracy and efficiency of the direct shear apparatus in detecting the alignment state of the upper and lower shear boxes 2.

[0034] Specifically, both the upper distance sensors 4 and the lower distance sensors 5 adopt high-precision and high-stability laser distance sensors.

[0035] Specifically, the distance sensors can be completely embedded in the inner wall of the base 1, or can protrude a certain distance from the inner wall as shown in the figure. The positions of the measuring ends of the upper distance sensors 4 and the lower distance sensors 5 should be aligned so that the control system can accurately calculate the distance difference after measurement.

[0036] The control system is also connected to an alarm and a display:

[0037] When the distance difference measured by the upper distance measuring sensor 4 and the lower distance measuring sensor 5 on the same side exceeds the preset range, the alarm will sound to enhance the reminder to the operator;

[0038] The display screen displays the position difference between the upper shear box 3 and the lower shear box 2 in the shearing direction and perpendicular to the shearing direction in real time, and prompts the adjustment direction of the upper shear box 3 in a graphical manner. The operator calibrates according to the prompts. When the distance difference is adjusted to within the preset range, the indicator light 6 goes out and the alarm is released.

[0039] See also Figure 3 and Figure 4 The second embodiment of the utility model provides a shear box with an alignment detection function, in which a distance measuring sensor is arranged outside the base 1, and can be applied to a shear box structure with a smaller volume, comprising: a base 1, a lower shear box 2 and an upper shear box 3 arranged in sequence from bottom to top;

[0040] The two adjacent side walls of the base 1 are both provided with a distance measuring sensor system, which includes a bracket 7 and an upper distance measuring sensor 4 and a lower distance measuring sensor 5 provided on the bracket 7. A measuring window 8 is provided on the side wall, so that the measuring end of the upper distance measuring sensor 4 is vertically pointed to the outer wall of the upper shear box 3, and the measuring end of the lower distance measuring sensor 5 is vertically pointed to the outer wall of the lower shear box 2;

[0041] The upper distance measuring sensor 4 is located directly above the lower distance measuring sensor 5;

[0042] A corresponding indicator light 6 is also provided on the bracket 7. The upper distance measuring sensor 4, the lower distance measuring sensor 5 and the indicator light 6 are all electrically connected to the control system. When the distance difference measured by the upper distance measuring sensor 4 and the lower distance measuring sensor 5 exceeds a preset range, the indicator light 6 lights up, prompting the operator to calibrate the alignment of the shear box.

[0043] Specifically, the upper distance measuring sensor 4 and the lower distance measuring sensor 5 are both laser distance measuring sensors with high precision and high stability.

[0044] The upper distance sensor 4 and the lower distance sensor 5 are connected to the bracket 7 through a locking device and can be adjusted up and down to adapt to different shear box sizes:

[0045] The bracket 7 is provided with a long hole, and the locking device includes a connecting piece and a fastening screw. The upper distance sensor 4 or the lower distance sensor 5 is fixed to the connecting piece, and the connecting piece is locked to a suitable height of the bracket 7 by the fastening screw.

[0046] The control system may also be connected to an alarm and a display screen, and the configuration and effects are the same as those of the first embodiment.

[0047] The beneficial effects of a shearing box with an alignment detection function in the present utility model are as follows:

[0048] 1. By arranging two pairs of ranging sensors to measure the relative positions of the upper and lower shearing boxes and determine whether they are aligned, when the upper and lower shearing boxes are not aligned, an indicator light prompts the operator to perform calibration, greatly reducing the inspection times of the shearing box, simplifying the test steps, and improving efficiency;

[0049] 2. The control system is also connected with an alarm and a display screen, which can better prompt alignment abnormalities and intuitively guide the operator to perform calibration;

[0050] 3. Two arrangement positions of the ranging sensors are designed, which are respectively applicable to shearing boxes with larger volumes and smaller volumes.

[0051] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A shearing box with an alignment detection function, characterized in that, Comprising: A base, a lower shear box and an upper shear box which are arranged successively from bottom to top; Upper ranging sensors and lower ranging sensors are arranged on two adjacent inner walls of the base. The measuring ends of the upper ranging sensors vertically point to the outer wall of the upper shear box, and the measuring ends of the lower ranging sensors vertically point to the outer wall of the lower shear box, for directly measuring the distances from the upper and lower shear boxes to the inner wall of the base; The upper ranging sensors located on the same inner wall are directly above the lower ranging sensors; corresponding indicating lights are also arranged on the base. The upper ranging sensors, the lower ranging sensors and the indicating lights are all electrically connected to a control system. When the distance difference measured by the upper and lower ranging sensors on the same side exceeds a preset range, the corresponding indicating light lights up.

2. The shearing box with an alignment detection function according to claim 1, wherein The upper ranging sensors and the lower ranging sensors adopt laser ranging sensors or ultrasonic sensors.

3. The shearing box with an alignment detection function according to claim 2, characterized in that, The control system is also connected with an alarm. When the distance difference measured by the upper and lower ranging sensors on the same side exceeds a preset range, the alarm gives an alarm.

4. A shearing box with an alignment detection function according to any one of claims 1-3, characterized in that The control system is also connected with a display screen for real-time displaying the position differences between the upper shear box and the lower shear box in the shearing direction and in the direction perpendicular to the shearing direction.

5. A shearing box with an alignment detection function, characterized in that, Comprising: A base, a lower shear box and an upper shear box which are arranged successively from bottom to top; Ranging sensing systems are arranged outside two adjacent side walls of the base. The ranging sensing systems include brackets and upper ranging sensors and lower ranging sensors arranged on the brackets. Measuring windows are arranged on the side walls, so that the measuring ends of the upper ranging sensors vertically point to the outer wall of the upper shear box and the measuring ends of the lower ranging sensors vertically point to the outer wall of the lower shear box; The upper ranging sensors are directly above the lower ranging sensors; Corresponding indicating lights are also arranged on the brackets. The upper ranging sensors, the lower ranging sensors and the indicating lights are all electrically connected to a control system. When the distance difference measured by the upper and lower ranging sensors exceeds a preset range, the indicating lights light up.

6. A shearing box with an alignment detection function according to claim 5, characterized in that, The upper ranging sensors and the lower ranging sensors are both connected to the brackets through locking devices and can be adjusted up and down.

7. The shearing box with an alignment detection function according to claim 6, characterized in that, The control system is also connected with an alarm. When the distance difference measured by the upper and lower ranging sensors on the same side exceeds a preset range, the alarm gives an alarm.

8. A shearing box with an alignment detection function according to any one of claims 5-7, characterized in that, The control system is also connected with a display screen for real-time displaying the position differences between the upper shear box and the lower shear box in the shearing direction and in the direction perpendicular to the shearing direction.

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