An automatic displacement measuring device for a static load anchorage testing machine
By designing an automatic displacement measurement device on a static load anchorage testing machine, and utilizing components such as displacement sensors and guide frames, the automatic measurement of piston displacement was achieved, solving the problems of low accuracy and low efficiency in traditional methods, and improving measurement accuracy and efficiency.
Patent Information
- Application Number
- CN202522381534.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-11-06
- Estimated Expiration
- 2035-11-10
AI Technical Summary
Traditional static load anchorage testing machine piston displacement detection methods are characterized by low accuracy, large errors, and low efficiency.
Design an automatic displacement measuring device for a static load anchorage testing machine, which uses displacement sensors and mechanical components such as guide frames to achieve automatic measurement of piston displacement.
This improved the measurement accuracy of piston displacement, reduced errors, increased detection efficiency, and ensured the accuracy of detection results.
Smart Images
Figure CN224945781U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of static load anchorage testing machine equipment, and particularly relates to an automatic displacement measuring device for a static load anchorage testing machine. Background Technology
[0002] The static load anchorage testing machine is mainly used to test the static load anchorage performance of anchorages, clamps, and connectors for prestressed tendons. It is widely used in infrastructure construction fields such as railways, bridges, water conservancy, and power. During the static load anchorage performance test, two anchorages are clamped at both ends of the steel strand. Then, a loading device drives one anchorage to move away from the other, tensioning the steel strand and testing the overall stress and displacement of the anchorage assembly. The loading device typically uses a hydraulic cylinder and piston structure.
[0003] The anchor efficiency coefficient and the total elongation of the prestressed tendon under stress are important indicators for anchorage performance testing. The calculation of the total elongation requires the displacement of the piston under ultimate tension. The relevant test specifications do not provide specific test methods for measuring the piston displacement. The traditional test method is to manually measure it with calipers during the test. However, this test method has low accuracy, large measurement error, and low efficiency of manual testing. Utility Model Content
[0004] The purpose of this invention is to provide a displacement measuring device for a static load anchorage testing machine that can automatically detect piston displacement, so as to solve the technical problems of low accuracy, large error and low efficiency of traditional static load anchorage testing machine piston displacement detection methods.
[0005] To achieve the above objectives, the specific technical solution of this utility model is as follows: An automatic displacement measuring device for a static load anchorage testing machine is provided on one side of the static load anchorage testing machine. The static load anchorage testing machine includes a main unit and a control device for a detection system connected externally. The two opposite ends of the main unit are respectively designated as a fixed end and a tensioning end. The tensioning end is equipped with a hydraulic cylinder with a piston. The fixed end and the tensioning end are equipped with a pair of opposing anchor assemblies. The anchoring assembly of the tensioning end is located on the outer end of the hydraulic cylinder. The piston of the hydraulic cylinder is located at its outer end. The measuring device is installed on the outer wall of the hydraulic cylinder at the tensioning end. It includes a sensor support located at the inner end of the outer wall of the hydraulic cylinder. The sensor support is equipped with a displacement sensor connected to the control device of the host machine. The outer end face of the hydraulic cylinder is equipped with a guide frame corresponding to the inner and outer sides of the displacement sensor. The guide frame is equipped with a slide rail parallel to the axis of the hydraulic cylinder. The slide rail is equipped with a sliding rod that is slidably connected to it. The sliding rod corresponds to the displacement sensor. The outer end of the sliding rod is equipped with a connecting column perpendicular to it. The end of the connecting column points radially toward the inner ring of the outer end face of the piston. The bottom end of the connecting column is equipped with a contact block whose inner end abuts against the outer end face of the piston.
[0006] Furthermore, the displacement sensor is a pull-rope displacement sensor, with the free end of the pull rope located at the outer end of the displacement sensor, and the inner end of the moving rod having a pull-rope bracket with a connection hole. The free end of the pull rope is connected to the connection hole of the pull-rope bracket via a hook.
[0007] Furthermore, a spring is installed between the hydraulic cylinder and the rope support. The inner end of the hydraulic cylinder is provided with a flange boss, and the inner end of the spring is connected to the outer surface of the corresponding flange boss of the rope support, while its outer end is connected to the rope support.
[0008] Furthermore, the guide frame is equipped with a limit switch connected to the hydraulic cylinder, and the inner end of the limit switch is provided with a button corresponding to the pull rope bracket.
[0009] This utility model relates to an automatic displacement measuring device for a static load anchorage testing machine. It has a simple structure and is easy to assemble. It realizes the automatic measurement of the piston displacement of the static load anchorage testing machine. Compared with the traditional manual measurement, it has a smaller error rate, higher accuracy, faster efficiency, and more accurate test results. Attached Figure Description
[0010] Figure 1 This is a three-dimensional structural diagram of the present invention during installation; Figure 2 This utility model Figure 1 A top-view structural diagram; Figure 3 For reference regarding the usage status of this utility model Figure 1 ; Figure 4 For reference regarding the usage status of this utility model Figure 2 ; The markings in the diagram are as follows: 1. Main unit; 2. Hydraulic cylinder; 21. Piston; 3. Sensor support; 31. Displacement sensor; 32. Guide frame; 33. Moving rod; 34. Connecting column; 35. Contact block; 36. Pull rope bracket; 37. Spring; 38. Limit switch; 39. Button. Detailed Implementation
[0011] To better understand the purpose, structure, and function of this utility model, the following description, in conjunction with the accompanying drawings, provides a more detailed account of an automatic displacement measuring device for a static load anchorage testing machine.
[0012] like Figure 1-4 As shown, the automatic displacement measuring device of the static load anchorage testing machine of this utility model is located on one side of the static load anchorage testing machine. The static load anchorage testing machine includes a main unit 1. The main unit 1 is externally connected to a control device with a detection system through a corresponding circuit. The two opposite ends of the main unit 1 are respectively set as a fixed end and a tensioning end. The tensioning end is equipped with a hydraulic cylinder 2 with a piston 21. The fixed end and the tensioning end are equipped with a pair of opposing anchor assemblies. The anchoring assembly of the tensioning end is located on the outer end of the hydraulic cylinder 2. The automatic displacement measuring device of the static load anchorage testing machine of this utility model is installed on the hydraulic cylinder 2 of the tensioning end. When conducting the static load anchorage performance test of the anchor, it automatically measures the relative displacement between the hydraulic cylinder 2 and the piston 21.
[0013] The piston 21 of the hydraulic cylinder 2 is located on its outer end. The automatic displacement measuring device of the static load anchoring test machine of this utility model is located on the outer wall of the hydraulic cylinder 2, which is parallel to the axis of the hydraulic cylinder 2. It includes a sensor support 3, a displacement sensor 31, a guide frame 32, a moving rod 33, a connecting column 34, and a contact rotating block. The sensor support 3 is fixedly installed on the inner end of the outer wall of the hydraulic cylinder 2. The displacement sensor 31 is fixedly installed on the sensor support 3 and is connected to the control device of the host 1 through a corresponding circuit. The guide frame 32 is fixedly installed on the outer end face of the hydraulic cylinder 2, and its position is at the outer edge of the outer ring corresponding to the outer side of the displacement sensor 31. The guide frame 32 is provided with a slide rail parallel to the axis of the hydraulic cylinder 2. The moving rod 33 is slidably installed on the guide frame 32 through the slide rail and corresponds to the displacement sensor 31. The measuring device measures the displacement of the piston 21 through the cooperation of the moving rod 33 and the displacement sensor 31.
[0014] In this embodiment, the displacement sensor 31 is a pull-rope displacement sensor 31. The free end of the pull rope is located at the outer end of the displacement sensor 31. The inner end of the moving rod 33 is provided with a pull-rope bracket 36 with a connection hole. The free end of the pull rope of the displacement sensor 31 is detachably and fixedly connected to the connection hole of the pull-rope bracket 36 through a corresponding hook. The connecting post 34 is located at the outer end of the moving rod 33. In this embodiment, the moving rod 33 is parallel to the hydraulic cylinder 2, and the connecting post 34 is perpendicular to the axis of the moving rod 33. Its upper end is fixedly connected to the moving rod 33, and its lower end points radially outward from the piston 21. The inner ring of the end face has a contact block 35 at the bottom of the connecting column 34. The inner end of the contact block 35 abuts against the outer end face of the piston 21. During detection, the piston 21 moves to the outside under the action of the hydraulic cylinder 2. The piston 21 contact block 35 and the connecting column 34 drive the moving rod 33 to move synchronously to the outside of the hydraulic cylinder 2 along the slide of the guide block. The moving rod 33 pulls the rope of the displacement sensor 31 synchronously to the outside of the hydraulic cylinder 2 through the rope bracket 36. The displacement sensor 31 transmits the displacement of the piston 21 to the detection system of the host 1 control device so that it can automatically load and calculate.
[0015] Furthermore, the contact block 35 is rotatably connected to the connecting column 34. During the process of the piston 21 loading the steel strand through the anchoring assembly, the anchoring assembly and the piston 21 may rotate slightly under the action of the steel strand. The contact block 35 can avoid the torsional deformation of the moving rod 33 by rotating around the connecting column 34, thereby avoiding affecting the detection of the displacement of the piston 21.
[0016] Furthermore, a limit switch 38 connected to the hydraulic cylinder 2 is installed on the guide frame 32. The button 39 of the limit switch 38 is located on its inner end, and the button 39 corresponds to the pull rope bracket 36. When the piston 21 drives the pull rope bracket 36 to move outward through the moving rod 33, if the stroke of the piston 21 is too large, the pull rope bracket 36 contacts the button 39, triggering the switch to operate. The switch transmits a stop signal to the hydraulic cylinder 2, and the hydraulic cylinder 2 stops working, thereby preventing the piston 21 from moving out of the hydraulic cylinder 2.
[0017] Furthermore, a spring 37 is installed between the hydraulic cylinder 2 and the rope support 36. In this embodiment, the inner end of the hydraulic cylinder 2 is provided with an annular flange boss extending radially outward. The spring 37 is located between the flange boss and the rope support 36. Its inner end is connected to the outer surface of the flange boss corresponding to the rope support 36, and its outer end is connected to the rope support 36. During detection, when the piston 21 extends outward under the action of the hydraulic cylinder 2, it drives the spring 37 to extend synchronously. When the piston 21 completes one extension and retracts towards the hydraulic cylinder 2, the moving rod 33 drives the connecting column 34 to move synchronously towards the inner side of the hydraulic cylinder 2 with the piston 21 under the action of the spring 37, thereby realizing the automatic return of the measuring device.
[0018] During testing, firstly, the steel strand to be measured is fixed between the fixed end and the tensioning end of the main unit 1 using two anchor assemblies. Then, the main unit 1 is started. According to the preset test parameters in the control device, the main unit 1 pushes the piston 21 through the hydraulic cylinder 2 to stretch the steel strand, thereby realizing the test of the static load anchoring performance of the anchoring assembly. During this process, the measuring device measures the relative displacement of the hydraulic cylinder 2 and the piston 21 and transmits the measurement result data to the detection system of the control device of the main unit 1. After the test is completed, the moving rod 33 of the measuring device automatically returns to its original position under the action of the contraction tension of the spring 37, thus realizing the automatic measurement of the displacement of the static load anchoring test machine by the measuring device.
[0019] This utility model of an automatic displacement measuring device for a static load anchorage testing machine achieves automatic measurement of the displacement of the piston 21 of the static load anchorage testing machine through the cooperation of multiple mechanical components. It has a simple structure and is easy to assemble. Compared with traditional manual measurement, it can effectively reduce the measurement error of displacement, has higher measurement accuracy, greatly improves the testing efficiency, and can better ensure the accuracy of the test results.
[0020] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.
Claims
1. An automatic displacement measuring device for a static load anchorage testing machine, characterized in that, It is located on one side of the static load anchorage testing machine. The static load anchorage testing machine includes a main unit (1) and a control device for the detection system. The two opposite ends of the main unit (1) are respectively set as a fixed end and a tensioning end. The tensioning end is equipped with a hydraulic cylinder (2) with a piston (21). The fixed end and the tensioning end are equipped with a pair of anchor assemblies. The anchoring assembly of the tensioning end is located on the outer end of the hydraulic cylinder (2). The piston (21) of the hydraulic cylinder (2) is located at its outer end. The measuring device is installed on the outer wall of the hydraulic cylinder (2) at the tensioning end. It includes a sensor support (3) located at the inner end of the outer wall of the hydraulic cylinder (2). The sensor support (3) is equipped with a displacement sensor (31) connected to the control device of the host (1). The outer end face of the hydraulic cylinder (2) is equipped with a guide frame (32) corresponding to the inner and outer sides of the displacement sensor (31). The guide frame (32) is equipped with a slide rail parallel to the axis of the hydraulic cylinder (2). The slide rail is equipped with a sliding rod (33) slidably connected to it. The sliding rod (33) corresponds to the displacement sensor (31). The outer end of the sliding rod (33) is equipped with a connecting column (34) perpendicular to it. The end of the connecting column (34) points radially toward the inner ring of the outer end face of the piston (21). The bottom end of the connecting column (34) is equipped with a contact block (35) whose inner end abuts against the outer end face of the piston (21).
2. The automatic displacement measuring device for the static load anchorage testing machine according to claim 1, characterized in that, The displacement sensor (31) is a pull rope displacement sensor (31), with the free end of the pull rope located at the outer end of the displacement sensor (31). The inner end of the moving rod (33) is provided with a pull rope bracket (36) with a connection hole. The free end of the pull rope is connected to the connection hole of the pull rope bracket (36) by a hook.
3. The automatic displacement measuring device for the static load anchorage testing machine according to claim 2, characterized in that, A spring (37) is installed between the hydraulic cylinder (2) and the rope support (36). The inner end of the hydraulic cylinder (2) is provided with a flange boss. The inner end of the spring (37) is connected to the outer side of the flange boss corresponding to the rope support (36), and its outer end is connected to the rope support (36).
4. The automatic displacement measuring device for the static load anchorage testing machine according to claim 1, characterized in that, The guide frame (32) is equipped with a limit switch (38) connected to the hydraulic cylinder (2), and the inner end of the limit switch (38) is provided with a button (39) corresponding to the pull rope bracket (36).