Device for measuring relative displacement of steel plate in test of anti-sliding coefficient of steel plate bolt interface

Abstract

The utility model discloses a kind of steel plate bolt interface anti-slippage coefficient test in plate material relative displacement measuring device, the measuring device includes clamping assembly, two sensor clamping assemblies and two pen displacement sensors, the clamping assembly is used to clamp the inner plate of plate material, its front and back two sides are formed with the guide rail for installing two sensor clamping assemblies, two sensor clamping assemblies are respectively installed on the guide rail of front and back two sides, and two sensor clamping assemblies are symmetrically distributed with the center point of clamping assembly as symmetry center, two pen displacement sensors are respectively clamped in two sensor clamping assemblies, and the displacement end of two pen displacement sensors is perpendicular to the top surface or bottom surface of the outer plate of plate material and closely attached. The utility model can effectively solve the current steel plate bolt interface anti-slippage coefficient test field, plate material relative displacement measurement tool installation process is complicated, tool positioning precision is poor, measurement result exists error, the problem of poor measurement tool stability.

Description

Technical Field

[0001] This utility model relates to the technical field of determining the anti-slip coefficient of steel plate bolted joints, and in particular to a device for measuring the relative displacement of plates in the anti-slip coefficient test of steel plate bolted joints. Background Technology

[0002] The test for the anti-slip coefficient of bolted steel plate joints is used to determine the coefficient of friction between connection pairs that rely on bolted connections and the friction between plates to maintain structural stability. The experiment mainly refers to two standards: BS EN 1090-2-2008 (slip coefficient test section) and GB / T 34478-2017 (determination of anti-slip coefficient of bolted steel plate joints). The relative displacement between the inner and outer plates is one of the important parameters during the experiment; however, neither standard specifies how to collect this displacement.

[0003] Currently, the most common method used by testing institutions is to pre-drill small threaded holes in the sheet metal, and then fix the extensometers to the sheet metal using fixtures. At the start of the experiment, the inner plates at both ends are stretched, resulting in relative displacement with the outer plates. The displacement at both ends is measured using two extensometers. The displacement is calculated by the angle at which the built-in strain gauges open when the extensometers are stretched. This installation and measurement method has problems such as poor positioning accuracy, cumbersome manual operation process, the need for pre-drilling holes, and a certain degree of testing error. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface. This device can effectively solve the problems in the current field of testing the anti-slip coefficient of the steel plate bolt interface, such as cumbersome installation process of the plate relative displacement measuring fixture, poor fixture positioning accuracy, measurement error, and poor stability of the measuring fixture.

[0005] The objective of this utility model can be achieved by adopting the following technical solutions:

[0006] A device for measuring the relative displacement of a plate in a test of the anti-slip coefficient of a steel plate bolt interface. The device includes a clamping assembly, two sensor clamping assemblies, and two pen-type displacement sensors. The clamping assembly is used to clamp the inner plate of the plate, and guide rails for mounting the two sensor clamping assemblies are formed on its front and rear sides respectively. The two sensor clamping assemblies are respectively mounted on the guide rails on the front and rear sides, and the two sensor clamping assemblies are centrally symmetrically distributed with the center point of the clamping assembly as the center of symmetry. The two pen-type displacement sensors are respectively clamped on the two sensor clamping assemblies, and the displacement ends of the two pen-type displacement sensors are perpendicularly and tightly attached to the top or bottom surface of the outer plate of the plate.

[0007] Furthermore, the clamping assembly includes a plate fixing clamp, a plate movable clamp, a high-strength spring, and a movable spring buckle. The plate fixing clamp has an overall U-shaped structure and is composed of a back plate and two side plates connected together. The back plate is provided with a guide rail for installing the sensor clamping assembly. The ends of the two side plates are respectively connected to the two ends of the plate movable clamp through a high-strength spring and a movable spring buckle. The plate movable clamp has an overall straight structure and is provided with a guide rail for installing the sensor clamping assembly.

[0008] Furthermore, the guide rail is an I-groove guide rail.

[0009] Furthermore, a first guide groove and a first guide strip are respectively provided on the two contact surfaces of the plate fixing clamp and the plate movable clamp.

[0010] Furthermore, a rubber gasket is provided between the clamping assembly and the inner plate.

[0011] Furthermore, the sensor clamping assembly includes a sensor fixing clamp and a sensor movable clamp. The sensor fixing clamp and the sensor movable clamp are mounted on corresponding guide rails, with the sensor fixing clamp fixed to one end of the guide rail. The sensor movable clamp is connected to the sensor fixing clamp via a high-strength spring and can slide left and right along the guide rail.

[0012] Furthermore, V-grooves are provided on the two adjacent end faces of the sensor fixing clamp and the sensor movable clamp, and the pen-type displacement sensor is clamped between the V-grooves on the two end faces.

[0013] Furthermore, a second guide groove and a second guide strip are respectively provided on the two contact surfaces of the sensor fixed clamp and the sensor movable clamp, which are used to guide the movement of the sensor movable clamp.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0015] 1. The clamping assembly of this utility model has a simple structure and is easy to install. The original installation time using the extensometer drilling tool was about 20 minutes, while the installation time of this utility model is about 2 minutes, which effectively improves the installation efficiency.

[0016] 2. This utility model uses a pen-type displacement sensor instead of a traditional extensometer, avoiding the installation and positioning deviations that existed when the rubber band of the original extensometer was fixed, thus improving positioning accuracy and the stability of the measuring device.

[0017] 3. In actual experiments, this utility model uses two sets of devices symmetrically installed on the upper and lower parts of the inner plate of the plate, with a total of four displacement sensors. These sensors can monitor the relative displacement between the inner plate and each outer plate, improving the reliability and integrity of the measurement data. At the same time, the sensor clamping assembly adopts a high-strength spring clamping design, which is compatible with multiple specifications of displacement sensors, has a wide range of applications, and is highly practical.

[0018] 4. This utility model does not require drilling holes in the board material, so there is no situation where changes in the mechanical properties of the board material affect the experimental results. The measuring device can be made of lightweight materials to reduce the impact of its own weight on the measurement results. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the measuring device of this utility model.

[0020] Figure 2 This is a front view of the measuring device of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the plate fixing clamp of this utility model.

[0022] Figure 4 This is a schematic diagram of the movable clamping plate of the present invention.

[0023] Figure 5 This is a schematic diagram of the sensor fixing clamp of this utility model.

[0024] Figure 6 This is a side view of the sensor fixing clamp of this utility model.

[0025] Figure 7 This is a schematic diagram of the sensor movable clamping block of this utility model.

[0026] Figure 8 This is a schematic diagram of the installation of the measuring device of this utility model. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0028] like Figures 1 to 2As shown, this embodiment provides a device for measuring the relative displacement of a plate in a test of the anti-slip coefficient of a steel plate bolt interface. The measuring device includes a clamping assembly, two sensor clamping assemblies, and two pen-type displacement sensors 7. The clamping assembly is used to clamp the inner plate 9 of the plate. Guide rails 5 for mounting the two sensor clamping assemblies are formed on its front and rear sides respectively. The two sensor clamping assemblies are respectively mounted on the guide rails 5 on the front and rear sides, and the two sensor clamping assemblies are centrally symmetrically distributed with the center point of the clamping assembly as the center of symmetry. The two pen-type displacement sensors 7 are respectively clamped on the two sensor clamping assemblies, and the displacement ends of the two pen-type displacement sensors 7 are perpendicularly and tightly attached to the top or bottom surface of the outer plate 10 of the plate.

[0029] like Figures 3 to 4 As shown, the clamping assembly includes a plate fixing clamp 1, a plate movable clamp 2, a high-strength spring, and a movable spring clip. The plate fixing clamp 1 has an overall U-shaped structure and is composed of a back plate and two side plates connected together. The back plate is provided with a guide rail 5 for installing the sensor clamping assembly. The ends of the two side plates are respectively connected to the two ends of the plate movable clamp 2 through a high-strength spring and a movable spring clip. The connection at one end by a movable spring clip facilitates the installation of the inner plate. The plate movable clamp 2 has an overall straight structure and is provided with a guide rail 5 for installing the sensor clamping assembly.

[0030] Guide rail 5 is an I-beam groove guide rail.

[0031] The two contact surfaces of the plate fixing clamp 1 and the plate movable clamp 2 are respectively provided with a first guide groove 101 and a first guide strip 201, which facilitate quick installation and connection.

[0032] A rubber gasket 6 is provided between the clamping assembly and the inner plate 9 to ensure clamping stability. At the same time, by changing the thickness of the rubber gasket 6, the inner plate 9 can be clamped within a certain thickness range.

[0033] like Figures 5 to 7 As shown, the sensor clamping assembly includes a sensor fixing clamp 3 and a sensor movable clamp 4. The sensor fixing clamp 3 and the sensor movable clamp 4 are installed on the corresponding guide rails 5. The sensor fixing clamp 3 is fixed to one end of the guide rail 5 and can be fixed to the guide rail 5 by permanent connection methods such as welding. The sensor movable clamp 4 is connected to the sensor fixing clamp 3 by a high-strength spring and can slide left and right along the guide rail 5.

[0034] V-grooves 8 are provided on the two adjacent end faces of the sensor fixing clamp 3 and the sensor movable clamp 4, and the pen-type displacement sensor 7 is clamped between the V-grooves 8 on the two end faces.

[0035] The sensor fixed clamp 3 and the sensor movable clamp 4 are respectively provided with a second guide groove 301 and a second guide bar 401 on the two contact surfaces that come into contact with each other, which are used to guide the movement of the sensor movable clamp 4.

[0036] The method of using this utility model is as follows:

[0037] like Figure 8 As shown, in order to ensure the reliability, repeatability and accuracy of the experiment and the accuracy of the data, two sets of measuring devices were symmetrically installed on the upper and lower parts of the inner plate of the plate when conducting the test of the anti-slip coefficient of the steel plate bolt interface. During installation, it was ensured that the clamping components were clamped in the appropriate position of the inner plate and that its level was guaranteed. The upper and lower clamping methods were the same, and the inner plate could be clamped by fastening the movable spring buckle.

[0038] Before starting the experiment, install the pen-type displacement sensors. Pull apart the sensor's movable clamp and fixed clamp, and secure the sensor using the central V-groove. Note that the sensor's displacement end must be perpendicular to the top or bottom surface of the outer plate, and the sensor's position should be controlled to ensure a certain initial displacement (ideally 2 / 3 of the range). This embodiment uses four displacement sensors; the number can be adjusted depending on the size of the plate. Finally, connect the sensors to the monitoring system to monitor changes in displacement in real time.

[0039] The above description is only a preferred embodiment of this utility model patent, but the protection scope of this utility model patent is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed in this utility model patent, based on the technical solution and utility model patent concept of this utility model patent, shall fall within the protection scope of this utility model patent.

Claims

1. A device for measuring the relative displacement of plates in a test of the anti-slip coefficient of a steel plate bolt interface, characterized in that: The measuring device includes a clamping assembly, two sensor clamping assemblies, and two pen-type displacement sensors. The clamping assembly is used to clamp the inner plate of the plate, and guide rails for mounting the two sensor clamping assemblies are formed on its front and rear sides respectively. The two sensor clamping assemblies are respectively mounted on the guide rails on the front and rear sides, and the two sensor clamping assemblies are centrally symmetrically distributed with the center point of the clamping assembly as the center of symmetry. The two pen-type displacement sensors are respectively clamped on the two sensor clamping assemblies, and the displacement ends of the two pen-type displacement sensors are perpendicularly and tightly attached to the top or bottom surface of the outer plate of the plate.

2. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 1, characterized in that: The clamping assembly includes a plate fixing clamp, a plate movable clamp, a high-strength spring, and a movable spring buckle. The plate fixing clamp has an overall U-shaped structure and is composed of a back plate and two side plates connected together. The back plate is provided with a guide rail for installing the sensor clamping assembly. The ends of the two side plates are respectively connected to the two ends of the plate movable clamp through a high-strength spring and a movable spring buckle. The plate movable clamp has an overall straight structure and is provided with a guide rail for installing the sensor clamping assembly.

3. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 2, characterized in that: The guide rail is an I-groove guide rail.

4. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 2, characterized in that: The two contact surfaces of the plate fixing clamp and the plate movable clamp are respectively provided with a first guide groove and a first guide strip.

5. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 1, characterized in that: A rubber gasket is provided between the clamping assembly and the inner plate.

6. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 1, characterized in that: The sensor clamping assembly includes a sensor fixed clamp and a sensor movable clamp. The sensor fixed clamp and the sensor movable clamp are mounted on corresponding guide rails, with the sensor fixed clamp fixed to one end of the guide rail. The sensor movable clamp is connected to the sensor fixed clamp via a high-strength spring and can slide left and right along the guide rail.

7. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 6, characterized in that: The sensor fixed clamp and the sensor movable clamp are provided with V-shaped grooves on two adjacent end faces, and the pen-type displacement sensor is clamped between the V-shaped grooves on the two end faces.

8. The device for measuring the relative displacement of the plate in the test of the anti-slip coefficient of the steel plate bolt interface according to claim 6, characterized in that: The sensor fixed clamp and the sensor movable clamp are respectively provided on the two contact surfaces that come into contact with each other, and the second guide groove and the second guide strip are used to guide the movement of the sensor movable clamp.

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