Positioning structure for testing yield strength of reinforcing steel bar

Abstract

The utility model relates to a positioning structure for reinforcing steel bar yield strength testing, and relates to the field of reinforcing steel bar testing. The device comprises a U-shaped seat, a base block is fixedly installed on the surface of the U-shaped seat, a test board is fixedly installed at the bottom of the U-shaped seat, a U-shaped sleeve is welded to the surface of the base block, an air cylinder is fixedly installed on the inner wall of the U-shaped seat through a bolt, and the output end of the air cylinder penetrates into an inner cavity of the U-shaped sleeve and is fixedly connected with a sliding block. The sliding block can be driven to move through the air cylinder, the sliding block drives the hook blocks to swing under the cooperation action of the second connecting rod, the first connecting rod and the swing block, then the two hook blocks swing relatively and are clamped with the clamping grooves, the hook blocks clamp and position the ends of the reinforcing steel bars, and the purpose that the ends of the reinforcing steel bars are clamped and positioned while pressing plate limiting is achieved can be achieved. The two ends of the steel bar are clamped and positioned, so that displacement of the two ends of the steel bar when the middle part of the steel bar is stressed is avoided, and the purpose of improving the yield strength test accuracy of the steel bar is achieved.

Description

Technical Field

[0001] The present application relates to the field of steel bar testing, and in particular to a positioning structure for steel bar yield strength testing. Background Art

[0002] In the construction field, the yield strength of steel bar materials is an important assessment indicator. When testing the yield strength of steel bars, sampling is usually carried out. After sampling, the steel bar sample is placed flat, the two ends of the steel bar are pressed by pressure plates, and then the middle of the steel bar is squeezed from the top by a punch. A pressure sensor is set inside the punch, and the pressure sensor is connected to the control instrument. When the steel bar is deformed by force, the pressure sensor measures a value, and the yield strength of the steel bar can be calculated based on this value.

[0003] When the middle part of the steel bar is pressed down by the pressure plate, although the two ends of the steel bar are clamped and limited by the pressure plate, the horizontal freedom of the steel bar is not completely restricted. When the squeezing pressure on the middle part of the steel bar is too large, it may cause the two ends of the steel bar to slightly displace toward the middle. This displacement is difficult to detect, but it will still affect the accuracy of the measured value. Therefore, a positioning structure for steel bar yield strength test is needed, which can clamp and position the two ends of the steel bar while limiting the pressure plate, thereby avoiding the displacement of the two ends of the steel bar when the middle part is subjected to force, thereby improving the accuracy of the steel bar yield strength test. Utility Model Content

[0004] In order to solve the existing technical problems, the present application provides a positioning structure for steel bar yield strength testing, which clamps and positions the two ends of the steel bar while limiting the pressure plate, thereby avoiding displacement of the two ends of the steel bar when the middle part is subjected to force, thereby improving the accuracy of the steel bar yield strength test to solve the problems raised in the above background technology.

[0005] The present application provides a positioning structure for testing the yield strength of steel bars, which adopts the following technical scheme: a positioning structure for testing the yield strength of steel bars, comprising a U-shaped seat: a base block is fixedly mounted on the surface of the U-shaped seat, a test bench is fixedly mounted on the bottom of the U-shaped seat, a U-shaped sleeve is welded on the surface of the base block, a cylinder is fixedly mounted on the inner wall of the U-shaped seat by bolts, an output end of the cylinder passes through the inner cavity of the U-shaped sleeve and is fixedly connected to a slider, two symmetrically arranged swing blocks are rotatably connected to the surface of the base block via a rotating shaft, a connecting rod 1 is rotatably connected to the surface of the swing block via a rotating shaft, a connecting rod 2 is rotatably connected between the end of the connecting rod 1 and the slider via a rotating shaft, steel bars are arranged above the test bench, a slot is opened on the surface of the steel bars, a hook block is welded on the surface of the swing block, and the hook end of the hook block engages with the inner wall of the slot.

[0006] By adopting the above technical solution, the slider is driven to move by the cylinder, so that the slider drives the hook block to swing through the cooperation of connecting rod 2, connecting rod 1 and the swing block, and then the two hook blocks swing relatively and engage with the slots, so that the hook blocks clamp and position the ends of the steel bars, and the two ends of the steel bars can be clamped and positioned while the pressure plate is limited, thereby avoiding the displacement of the two ends of the steel bars when the middle part is stressed, thereby improving the accuracy of the steel bar yield strength test.

[0007] Preferably, the output end of the cylinder is slidably connected to the U-shaped sleeve, and the sliding block is an I-shaped block.

[0008] Preferably, a limiting shaft rod is welded to the top and the bottom of the sliding block, the limiting shaft rod penetrates to the outside of the U-shaped sleeve, and a rod groove matching the limiting shaft rod is provided on the surface of the U-shaped sleeve.

[0009] By adopting the above technical solution, the movement of the slider in the inner cavity of the U-shaped sleeve is limited by the coordinated use of the limiting shaft rod and the rod groove, thereby avoiding the shaking of the slider during movement and improving the stability of the slider position.

[0010] Preferably, two symmetrically arranged storage seats are fixedly mounted on the top of the test bench by bolts, a pneumatic pressing plate is mounted on the storage seats, and an arc groove matching the steel bar is formed on the inner wall of the storage seat.

[0011] By adopting the above technical solution and setting the arc groove, the contact area between the steel bar and the inner wall of the storage seat is increased, so that the contact position between the steel bar and the storage seat after being stressed is more stable, and the possibility of sliding of the steel bar is reduced.

[0012] Preferably, a reinforcement rod is welded between the U-shaped seat and the storage seat, and the reinforcement rod is a stainless steel square tube.

[0013] By adopting the above technical solution and setting a reinforcing rod, the storage seat and the U-shaped seat are fixed so that the two are connected as a whole, thereby improving the stability of the connection between the two.

[0014] Preferably, a gantry and a control box are fixedly mounted on the top of the test bench by bolts, and an extrusion assembly is mounted on the surface of the gantry.

[0015] Preferably, the bottom of the extrusion assembly is equipped with a strain gauge pressure sensor and an extrusion plate, and the strain gauge pressure sensor is electrically connected to the control box via a wire.

[0016] Preferably, the inner wall of the pneumatic lower pressure plate is frosted to have a friction surface.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. The utility model drives the slider to move through the cylinder, so that the slider drives the hook block to swing under the cooperation of the connecting rod 2, the connecting rod 1 and the swing block, and then the two hook blocks swing relatively and engage with the slots, so that the hook blocks clamp and position the ends of the steel bars, so that the two ends of the steel bars can be clamped and positioned while the pressure plate is limited, thereby avoiding the displacement of the two ends of the steel bars when the middle part is stressed, thereby improving the accuracy of the steel bar yield strength test.

[0019] 2. The utility model limits the movement of the slider in the inner cavity of the U-shaped sleeve by using the limiting shaft rod and the rod groove in coordination, thereby avoiding the shaking of the slider during movement and improving the stability of the slider position.

[0020] 3. The utility model increases the contact area between the steel bar and the inner wall of the storage seat by setting the arc groove, so that the contact position between the steel bar and the storage seat after being stressed is more stable, and the possibility of sliding of the steel bar is reduced.

[0021] 4. The utility model fixes the storage seat and the U-shaped seat by setting a reinforcement rod, so that the two are connected as a whole, thereby improving the stability of the connection between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0023] Figure 1 It is a schematic diagram of the structure of the utility model.

[0024] Figure 2 This utility model Figure 1 A partial enlarged view of point A in the middle.

[0025] Figure 3 It is a three-dimensional schematic diagram of the steel bar and the hook block of the utility model.

[0026] Figure 4 It is a three-dimensional schematic diagram of the pneumatic lower pressure plate of the utility model.

[0027] Explanation of the reference numerals in the accompanying drawings: 1. U-shaped seat; 2. base block; 3. U-shaped sleeve; 4. cylinder; 5. slider; 6. swing block; 7. connecting rod one; 8. connecting rod two; 9. limit shaft rod; 10. rod groove; 11. storage seat; 12. pneumatic lower pressure plate; 13. steel bar; 14. arc groove; 15. card slot; 16. hook block; 17. reinforcement rod; 18. gantry; 19. control box; 20. extrusion assembly; 21. friction surface. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0031] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0032] In addition, the term "plurality" shall mean two or more.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] Embodiment 1:

[0035] Combination Figure 1-Figure 4The embodiment of the present application discloses a positioning structure for testing the yield strength of steel bars, comprising a U-shaped seat 1: a base block 2 is fixedly mounted on the surface of the U-shaped seat 1, a test bench is fixedly mounted on the bottom of the U-shaped seat 1, a U-shaped sleeve 3 is welded on the surface of the base block 2, a cylinder 4 is fixedly mounted on the inner wall of the U-shaped seat 1 by bolts, the output end of the cylinder 4 penetrates into the inner cavity of the U-shaped sleeve 3 and is fixedly connected with a slider 5, the output end of the cylinder 4 is slidably connected to the U-shaped sleeve 3, the slider 5 is an I-shaped block, the surface of the base block 2 is rotatably connected to two symmetrically arranged swing blocks 6 through a rotating shaft, the surface of the swing block 6 is rotatably connected to a connecting rod 7 through a rotating shaft, and the end of the connecting rod 7 is connected to the slider 5 are rotatably connected with a connecting rod 8 through a rotating shaft. A limiting shaft rod 9 is welded to the top and bottom of the slider 5. The limiting shaft rod 9 penetrates to the outside of the U-shaped sleeve 3. A rod groove 10 adapted to the limiting shaft rod 9 is provided on the surface of the U-shaped sleeve 3. Through the coordinated use of the limiting shaft rod 9 and the rod groove 10, the movement of the slider 5 in the inner cavity of the U-shaped sleeve 3 is limited, thereby avoiding the shaking of the slider 5 during movement and improving the stability of the position of the slider 5. A steel bar 13 is arranged above the test bench, and a groove 15 is provided on the surface of the steel bar 13. A hook block 16 is welded on the surface of the swing block 6, and the hook end of the hook block 16 is engaged with the inner wall of the groove 15.

[0036] Embodiment 2:

[0037] Combination Figure 1-Figure 4 The top of the test bench is fixed with two symmetrically arranged storage seats 11 by bolts, and a pneumatic lower pressure plate 12 is installed on the storage seat 11. The inner wall of the storage seat 11 is provided with an arc groove 14 adapted to the steel bar 13. The setting of the arc groove 14 increases the contact area between the steel bar 13 and the inner wall of the storage seat 11, so that the contact position between the steel bar 13 and the storage seat 11 after being stressed is more stable, and the possibility of sliding of the steel bar 13 is reduced. A reinforcement rod 17 is welded between the U-shaped seat 1 and the storage seat 11. The reinforcement rod 17 is made of stainless steel. The square tube is fixed between the storage seat 11 and the U-shaped seat 1 by setting a reinforcing rod 17, so that the two are connected as a whole, thereby improving the stability of the connection between the two. The top of the test bench is fixed with a gantry 18 and a control box 19 by bolts. The surface of the gantry 18 is installed with an extrusion component 20. The bottom of the extrusion component 20 is equipped with a strain type pressure sensor and an extrusion plate. The strain type pressure sensor and the control box 19 are electrically connected through a wire. The inner wall of the pneumatic lower pressure plate 12 is frosted and has a friction surface 21.

[0038] Working principle: When the utility model is used, the user sets a plurality of slots 15 on the surface of the steel bar 13, then places the steel bar 13 in the inner cavity of the storage seat 11, and then presses down the two ends of the steel bar 13 by the pneumatic pressing plate 12 to limit the downward movement. The friction surface 21 is set to increase the static friction between the inner wall of the pneumatic pressing plate 12 and the surface of the steel bar 13, further improving the stability of the horizontal position of the steel bar 13. Then, the cylinder 4 is turned on to drive the slider 5 to move, so that the slider 5 drives the hook block 16 to swing under the cooperation of the connecting rod 2 8, the connecting rod 1 7 and the swing block 6, and then the two hook blocks 16 are relative to each other. The hook block 16 is swung and engaged with the slot 15, so that the end of the steel bar 13 is clamped and positioned by the hook block 16, and then the middle of the steel bar 13 is pressed down by the extrusion assembly 20, so that the strain sensor transmits the measured value to the control box 19. In this process, the two ends of the steel bar 13 are limited by the clamping engagement of the slot 15 and the hook block 16, which further ensures the stability of the position of the two ends of the steel bar 13 when the middle part is stressed, and achieves the clamping and positioning of the two ends of the steel bar, thereby avoiding the displacement of the two ends of the steel bar when the middle part is stressed, thereby improving the accuracy of the steel bar yield strength test.

[0039] In summary: the positioning structure for the steel bar yield strength test drives the slider 5 to move through the cylinder 4, so that the slider 5 drives the hook block 16 to swing through the cooperation of the connecting rod 2 8, the connecting rod 1 7 and the swing block 6, and then the two hook blocks 16 swing relative to each other and engage with the slot 15, so that the hook block 16 clamps and positions the end of the steel bar 13, so that the two ends of the steel bar can be clamped and positioned while the pressure plate is limited, thereby avoiding the displacement of the two ends of the steel bar when the middle part is stressed, thereby improving the accuracy of the steel bar yield strength test.

[0040] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A positioning structure for testing the yield strength of steel bars, characterized in that: The invention comprises a U-shaped seat (1): a base block (2) is fixedly mounted on the surface of the U-shaped seat (1); a test bench is fixedly mounted on the bottom of the U-shaped seat (1); a U-shaped sleeve (3) is welded on the surface of the base block (2); a cylinder (4) is fixedly mounted on the inner wall of the U-shaped seat (1) by means of bolts; an output end of the cylinder (4) penetrates the inner cavity of the U-shaped sleeve (3) and is fixedly connected to a slider (5); two symmetrically arranged swing blocks (6) are rotatably connected to the surface of the base block (2) by means of a rotating shaft; a first connecting rod (7) is rotatably connected to the surface of the swing block (6) by means of a rotating shaft; a second connecting rod (8) is rotatably connected between the end of the first connecting rod (7) and the slider (5) by means of a rotating shaft; a steel bar (13) is arranged above the test bench; a clamping groove (15) is provided on the surface of the steel bar (13); a hook block (16) is welded on the surface of the swing block (6); a hook end of the hook block (16) is engaged with the inner wall of the clamping groove (15).

2. A positioning structure for steel bar yield strength testing according to claim 1, characterized in that: The output end of the cylinder (4) is slidably connected to the U-shaped sleeve (3), and the sliding block (5) is an I-shaped block.

3. A positioning structure for steel bar yield strength testing according to claim 2, characterized in that: A limiting shaft rod (9) is welded to the top and bottom of the sliding block (5), the limiting shaft rod (9) penetrates to the outside of the U-shaped sleeve (3), and a rod groove (10) matching the limiting shaft rod (9) is formed on the surface of the U-shaped sleeve (3).

4. A positioning structure for steel bar yield strength testing according to claim 3, characterized in that: Two symmetrically arranged storage seats (11) are fixedly mounted on the top of the test bench by bolts, a pneumatic lower pressure plate (12) is mounted on the storage seats (11), and an arc-shaped groove (14) adapted to fit the steel bar (13) is formed on the inner wall of the storage seat (11).

5. A positioning structure for steel bar yield strength testing according to claim 4, characterized in that: A reinforcement rod (17) is welded between the U-shaped seat (1) and the storage seat (11), and the reinforcement rod (17) is a stainless steel square tube.

6. A positioning structure for steel bar yield strength testing according to claim 5, characterized in that: A gantry (18) and a control box (19) are fixedly mounted on the top of the test bench by means of bolts, and an extrusion assembly (20) is mounted on the surface of the gantry (18).

7. A positioning structure for steel bar yield strength testing according to claim 6, characterized in that: The bottom of the extrusion assembly (20) is equipped with a strain gauge pressure sensor and an extrusion plate, and the strain gauge pressure sensor is electrically connected to the control box (19) via a wire.

8. A positioning structure for steel bar yield strength testing according to claim 7, characterized in that: The inner wall of the pneumatic lower pressing plate (12) is frosted to form a friction surface (21).

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