Displacement meter fixing device for steel bar pull-out test

Abstract

The utility model provides a displacement meter fixing device for a steel bar pull-out test, which comprises a test device body, the body comprises a first base, a second base, a mounting rack and a displacement meter arranged on the mounting rack, and a groove suitable for the insertion of the bottom end of the mounting rack is arranged between the first base and the second base; a clamping groove used for clamping a reinforcing steel bar is further formed between the first base and the second base. A connecting assembly is further arranged between the first base and the second base. When the test device body is fixed on the reinforcing steel bar through the clamping groove, the detection pointer of the displacement meter is parallel to the reinforcing steel bar, so that the needle head of the detection pointer is aligned with the detection point position for detection, the device can be fixed on the reinforcing steel bar, and the displacement meter is mounted and erected on the device. Relative slippage between the steel bar and concrete or other members can be accurately measured.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a displacement meter fixing device for a steel bar pulling test. Background Art

[0002] Civil engineering structural testing is an important practice for the research and development of structural design theory. From the mechanical properties of various materials to the basic calculation methods of various structures and the verification of various new structures, experimental research is indispensable. In building structures, steel bars can ensure the stability, safety and durability of buildings, so experimental research on steel bars is crucial. The steel bar pull-out test is an important test to test the performance of steel bars in the structure. During the test, the relative slip between steel bars and concrete or other components is usually tested.

[0003] Conventional displacement meters are magnetic bases with clamps, which are adsorbed on iron devices. They usually measure the absolute slippage of steel bars, and a platform needs to be extended on the steel bars as a measuring point. The measured displacement is usually inaccurate. Therefore, in view of the above invention defects, a displacement meter bracket that can be fixed on steel bars is developed. The displacement meter installed on the fixture can accurately measure the relative slippage between steel bars and concrete or other components. Utility Model Content

[0004] The utility model provides a displacement meter fixing device for a steel bar pulling test. The device can be fixed on a steel bar and a displacement meter is installed on the device, so that the relative slippage between the steel bar and concrete or other components can be accurately measured.

[0005] In order to solve the above technical problems, the utility model provides a displacement meter fixing device for a steel bar pulling test, comprising a displacement meter fixing device body, the body comprising a first base, a second base, a mounting frame and a displacement meter installed on the mounting frame, a groove suitable for inserting the bottom end of the mounting frame is provided between the first base and the second base, the first base is provided with a first mounting hole connected to the groove, and a second mounting hole matching the first mounting hole is provided on one side of the mounting frame; a clamping groove for clamping the steel bar is also provided between the first base and the second base, and the clamping groove is vertically penetrated at the upper and lower ends; a connecting component is also provided between the first base and the second base; when the body is fixed on the steel bar through the clamping groove, the detection pointer of the displacement meter is arranged parallel to the steel bar.

[0006] As a further optimization, the mounting frame includes a main rod and a U-shaped seat, the U-shaped seat is arranged perpendicular to the main rod, and the U-shaped seat is provided with a mounting groove suitable for placing the displacement meter.

[0007] As a further optimization, third mounting holes are symmetrically arranged on both sides of the mounting groove, and the third mounting holes are used to install and fix the displacement meter.

[0008] As a further optimization, a plurality of connecting holes are coaxially arranged between the first base and the second base; the connecting assembly includes a connecting bolt and a spring sheet, the connecting bolt is threadedly connected to the connecting hole, and the spring sheet is arranged between the first base and the nut end of the connecting bolt.

[0009] As a further optimization, two connecting holes are provided; the two connecting holes are respectively located on both sides of the clamping groove.

[0010] As a further optimization, the clamping groove consists of two semicircular grooves, and a rubber pad is arranged on the inner end of the semicircular groove.

[0011] As a further optimization, a gap is left between the first base and the second base.

[0012] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0013] The present application provides a displacement meter fixing device for a steel bar pull-out test, comprising a displacement meter fixing device body, the body comprising a first base, a second base, a mounting frame and a displacement meter installed on the mounting frame, a groove suitable for inserting the bottom end of the mounting frame is provided between the first base and the second base; a clamping groove for clamping the steel bar is also provided between the first base and the second base; a connecting assembly is also provided between the first base and the second base; when the displacement meter fixing device body is fixed on the steel bar through the clamping groove, the detection pointer of the displacement meter is arranged parallel to the steel bar, so that the needle of the detection pointer is aligned with the detection point for detection, and the relative slip between the steel bar and concrete or other components can be accurately measured by allowing the device to be fixed on the steel bar and installing the displacement meter on the device. At the same time, by providing a gap between the first base and the second base to cooperate with a high-elastic rubber pad and providing a spring sheet between the first base and the nut end of the connecting bolt, the device and the steel bar are prevented from slipping when the steel bar undergoes necking, thereby ensuring the stability of the device and enabling accurate measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1It is a structural schematic diagram of a displacement meter fixing device for a steel bar pulling test in an embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a displacement meter fixing device body for a steel bar pulling test of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the first base and the second base of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the mounting frame of the utility model;

[0019] Markings in the figure: 1. Main body; 2. Concrete; 3. Steel bar; 4. Acrylic plate; 5. First base; 6. Second base; 7. Mounting frame; 8. Displacement meter; 9. Connecting bolt; 10. Shrapnel; 11. Groove; 12. First mounting hole; 13. Second mounting hole; 14. Clamping groove; 15. Main rod; 16. U-shaped seat; 17. Connecting hole; 18. Mounting groove; 19. Third mounting hole; 20. Semicircular groove; 21. Rubber pad. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the implementation mode of the utility model clearer, the technical scheme in the implementation mode of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation mode of the utility model. Obviously, the described implementation mode is a part of the implementation mode of the utility model, not all of the implementation modes. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the implementation mode of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected implementation mode of the utility model. Based on the implementation mode in the utility model, all other implementation modes obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] Depend on Figures 1 to 4As shown, the embodiment of the utility model provides a steel bar pulling test device, including a displacement meter fixing device body 1 and a test piece, in this embodiment, the test piece is concrete 2 and a steel bar 3 fixed in the concrete 2. Among them, the body 1 includes a first base 5, a second base 6, a mounting frame 7 and a displacement meter 8 installed on the mounting frame 7, a groove 11 suitable for the bottom end of the mounting frame 7 to be inserted is provided between the first base 5 and the second base 6, the groove 11 is arranged in a rectangular shape, the first base 5 is provided with a first mounting hole 12 connected to the groove 11, and a second mounting hole 13 matching the first mounting hole 12 is provided on one side of the mounting frame 7; a clamping groove 14 for clamping the steel bar 3 is also provided between the first base 5 and the second base 6, and the clamping groove 14 is vertically penetrated at both ends, and is used to clamp the steel bar 3; a connecting component is also provided between the first base 5 and the second base 6, which is used to connect the two and clamp the steel bar 3 close to each other; when the body 1 is fixed on the steel bar 3 through the clamping groove 14, the detection pointer of the displacement meter 8 is arranged parallel to the steel bar 3. Among them, the mounting frame 7 includes a main rod 15 and a U-shaped seat 16. The U-shaped seat 16 is arranged perpendicular to the main rod 15. The U-shaped seat 16 is provided with a mounting groove 18 suitable for placing the displacement meter 8. After the bottom of the main rod 15 is inserted into the groove 11, bolts are respectively passed through the first mounting hole 12 and the second mounting hole 13 for threaded connection, so that the main rod 15 is fixed in a state perpendicular to the first base 5.

[0022] Furthermore, a plurality of connecting holes 17 are coaxially provided between the first base 5 and the second base 6; the connecting assembly includes a connecting bolt 9 and a spring sheet 10, the connecting bolt 9 is threadedly connected to the connecting hole 17, and the spring sheet 10 is provided between the first base 5 and the nut end of the connecting bolt 9 to enhance the stability of the connection. The connecting bolt 9 passes through the connecting holes 17 formed at corresponding positions of the first base 5 and the second base 6, and the two are gradually brought closer, and the clamping groove 14 is aligned with the steel bar 3 for clamping, at which time the main rod 15 is parallel to the steel bar 3.

[0023] Furthermore, third mounting holes 19 are symmetrically provided on both sides of the mounting groove 18, and the third mounting holes 19 are used to install and fix the displacement meter 8. The bottom of the mounting groove 18 is parallel to the end face of the main rod 15, and the displacement meter 8 is fitted into the mounting groove 18 with the output end facing downward, and the displacement meter 8 is fixed with bolts through the third mounting holes 19 on both sides. In this way, the detection pointer of the displacement meter 8 is also set downward and parallel to the steel bar 3. By placing an acrylic plate 4 on the concrete 2 as a plane against the needle of the detection pointer, the steel bar 3 can be pulled by other pulling mechanisms, such as an MTS testing machine (not shown in the figure), to complete the detection.

[0024] Preferably, in the present embodiment, two connecting holes 17 are provided; the two connecting holes 17 are respectively located on both sides of the clamping groove 14 and are located on the same horizontal line, and are connected from both sides of the clamping groove 14 close to the first base 5 and the second base 6, so that the steel bar 3 can be clamped better and more stably.

[0025] Preferably, the clamping groove 14 is composed of two semicircular grooves 20, and a rubber pad 21 is provided on the inner end of the semicircular groove 20. Furthermore, a gap is left between the first base 5 and the second base 6. The clamping groove 14 is designed to match the steel bar 3 through the two semicircular grooves 20, and the rubber pad 21 is a high elastic rubber pad 21. When the steel bar 3 is clamped, the high elastic rubber pad 21 and the spring 10 are both in a compressed state, and when the steel bar 3 is pulled out, the steel bar 3 is subjected to stress and the necking phenomenon occurs, and the diameter is reduced, leaving a certain gap. When the diameter of the steel bar 3 is reduced, the spring 10 and the high elastic rubber pad 21 return to their original state, and the gap between the first base 5 and the second base 6 is reduced, so that the body 1 can still be firmly fixed on the steel bar 3.

[0026] It should be noted that the displacement meter fixture body 1 in this embodiment can be used not only to measure the relative slip between steel bars and concrete, but also to measure the relative slip between steel bars and other components, and the device is mainly used in steel bar pull-out tests, but is not limited to this.

[0027] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A displacement meter fixture for a steel bar pull-out test, comprising a displacement meter fixture body, characterized in that: The main body includes a first base, a second base, a mounting frame and a displacement meter installed on the mounting frame, a groove suitable for inserting the bottom end of the mounting frame is provided between the first base and the second base, the first base is provided with a first mounting hole connected to the groove, and a second mounting hole matching the first mounting hole is provided on one side of the mounting frame; a clamping groove for clamping steel bars is also provided between the first base and the second base, and the clamping groove is vertically penetrated at the upper and lower ends; a connecting component is also provided between the first base and the second base; when the main body is fixed on the steel bar through the clamping groove, the detection pointer of the displacement meter is arranged parallel to the steel bar.

2. A displacement meter fixing device for a steel bar pull-out test according to claim 1, characterized in that The mounting frame includes a main rod and a U-shaped seat, the U-shaped seat is arranged perpendicular to the main rod, and the U-shaped seat is provided with a mounting groove suitable for placing the displacement meter.

3. A displacement meter fixing device for a steel bar pull-out test according to claim 2, characterized in that , third mounting holes are symmetrically arranged on both sides of the mounting groove, and the third mounting holes are used to install and fix the displacement meter.

4. A displacement meter fixing device for a steel bar pull-out test according to claim 1, characterized in that A plurality of connecting holes are coaxially arranged between the first base and the second base; the connecting assembly includes a connecting bolt and a spring sheet, the connecting bolt is threadedly connected to the connecting hole, and the spring sheet is arranged between the first base and the nut end of the connecting bolt.

5. A displacement meter fixing device for steel bar pulling test according to claim 4, characterized in that There are two connecting holes, and the two connecting holes are respectively located on both sides of the clamping groove.

6. A displacement meter fixing device for a steel bar pull-out test according to claim 1, characterized in that The clamping groove consists of two semicircular grooves, and a rubber pad is arranged on the inner end of the semicircular groove.

7. The displacement meter fixing device for steel bar pulling test according to claim 1 is characterized in that , a gap is left between the first base and the second base.

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