Locking structure for reinforcing steel bar traction resistance detection

Abstract

The utility model discloses a locking structure for reinforcing steel bar traction resistance detection, which comprises a frame body, the surface of the frame body is fixedly connected with an air cylinder I through a bolt, a pulling wheel piece is arranged above the air cylinder I, the surface of the frame body is fixedly provided with an air cylinder II, the output end of the air cylinder II is fixedly connected with a transverse rod through a flange, and the transverse rod is fixedly connected with a locking device. A U-shaped groove is welded to the surface of the frame body, a steel bar to be tested is placed on the top of the frame body, and a sliding groove is formed in the surface of the U-shaped groove. The transverse rod drives the vertical rod to move upwards, then the vertical rod drives the supporting rod to turn over with the shaft rod as the center through the moving rod and the extrusion clamping block, and then the supporting rod compacts and locks a reinforcing steel bar to be tested to the top of the frame body, so that the reinforcing steel bar to be tested can be rapidly fixed to the surface of the testing frame body. Therefore, stability of two end positions of the steel bar in a traction test is guaranteed, and dismounting efficiency before and after detection of two ends of the steel bar is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of rebar testing technology, and in particular relates to a locking structure for testing the tensile strength of rebar. Background Technology

[0002] Reinforcing bars refer to steel used in reinforced concrete and prestressed reinforced concrete. Their cross-section is circular, and sometimes square with rounded corners. In order to check whether the reinforcing bars used in the blocks have reached the required tensile strength, the reinforcing bars in the blocks must be removed and tested.

[0003] The tensile strength of reinforcing bars is tested using conventional tensile testing equipment. However, conventional tensile testing equipment often clamps and fixes the two ends of the reinforcing bars by bolting. The bolts need to be rotated before and after the test, which is somewhat inconvenient. Therefore, a locking structure for testing the tensile strength of reinforcing bars is needed. This structure can quickly fix the reinforcing bar to be tested onto the surface of the test frame, thereby ensuring the stability of the position of the two ends of the reinforcing bar during the tensile test and effectively improving the efficiency of disassembly and assembly before and after the test. Utility Model Content

[0004] The purpose of this utility model is to provide a locking structure for testing the tensile strength of reinforcing bars, which quickly fixes the reinforcing bar to be tested onto the surface of the test frame, thereby ensuring the stability of the positions of both ends of the reinforcing bar during the tensile test and effectively improving the efficiency of disassembly and assembly before and after testing the two ends of the reinforcing bar, so as to solve the technical problems mentioned in the background art.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A locking structure for testing the tensile strength of reinforcing bars includes a frame: a cylinder is fixedly connected to the surface of the frame by bolts, a pull wheel is provided above the cylinder, a second cylinder is fixedly installed on the surface of the frame, a crossbar is fixedly connected to the output end of the second cylinder by a flange, a U-shaped groove is welded to the surface of the frame, the reinforcing bar to be tested is placed on the top of the frame, a sliding groove is opened on the surface of the U-shaped groove, a moving rod is provided in the inner cavity of the sliding groove, a vertical rod is fixedly connected to the surface of the moving rod, a shaft is rotatably connected to the inner wall of the U-shaped groove, a support rod is fixedly connected to the surface of the shaft, a clamping block is rotatably connected between the support rod and the moving rod through a rotating shaft, and a tension sensor is fixedly installed between the pull wheel and the output end of the cylinder.

[0006] Preferably, two symmetrically arranged limiting slide rods are welded to the surface of the frame, and the surface of the limiting slide rods is slidably connected to the pull wheel component.

[0007] Preferably, a semi-ring block is welded to the surface of the frame, and the inner diameter of the semi-ring block is adapted to the diameter of the reinforcing bar to be tested.

[0008] Preferably, the bottom end of the vertical rod extends through the lower part of the U-shaped groove and is fixedly connected to the horizontal rod, and the surface of the vertical rod is slidably connected to the U-shaped groove.

[0009] Preferably, a sleeve is rotatably connected to the surface of the movable rod, and the surface of the sleeve is in contact with the inner wall of the slide groove.

[0010] Preferably, a second limiting slide rod is fixedly connected to the surface of the frame, the top end of the second limiting slide rod extends through to the top of the crossbar, and the second limiting slide rod is slidably connected to the crossbar.

[0011] The beneficial effects of this utility model are:

[0012] This utility model uses a horizontal bar to drive the vertical bar upward, and then the vertical bar drives the support bar to rotate around the axis bar through the moving bar and the squeezing clamp. Then the support bar presses and locks the steel bar to be tested on the top of the frame, which can quickly fix the steel bar to be tested on the surface of the test frame, thereby ensuring the stability of the position of both ends of the steel bar during the tensile test, and effectively improving the efficiency of disassembly and assembly before and after the test of the two ends of the steel bar.

[0013] 2. By setting the limiting slide bar, this utility model limits the vertical movement of the pull wheel component, preventing it from wobbling during movement and thus ensuring its stability.

[0014] 3. By setting up a semi-ring block, this utility model increases the contact area between the frame and the steel bar to be tested, thereby ensuring the stability of the position of the steel bar to be tested when it is locked at the top of the frame.

[0015] 4. By using a sleeve, this utility model creates a gap between the moving rod and the inner wall of the slide groove, avoiding excessive wear when the two are in direct contact, thereby extending their service life.

[0016] 5. This utility model limits the movement of the horizontal bar in the vertical direction by setting the limiting slide bar two, thus ensuring the stability of the horizontal bar during the movement process. Attached Figure Description

[0017] in:

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0019] Figure 2 This is one embodiment of the present utility model. Figure 1 A magnified view of point A in the middle;

[0020] Figure 3 This is a three-dimensional schematic diagram of cylinder two and crossbar according to an embodiment of the present invention;

[0021] Figure 4 This is a three-dimensional schematic diagram of a shaft and a support rod according to an embodiment of the present invention.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Frame, 2. Cylinder 1, 3. Pulling wheel, 4. Limiting slide bar 1, 5. Cylinder 2, 6. Horizontal bar, 7. U-shaped groove, 8. Rebar to be tested, 9. Semi-ring block, 10. Slide groove, 11. Moving rod, 12. Vertical rod, 13. Sleeve, 14. Shaft rod, 15. Support rod, 16. Compression clamp, 17. Limiting slide bar 2, 18. Tension sensor. Detailed Implementation

[0024] In the following description, embodiments of the locking structure for testing the tensile strength of reinforcing bars according to the present invention will be described with reference to the accompanying drawings. Example 1

[0025] Figure 1-4 This invention illustrates a locking structure for testing the tensile strength of reinforcing bars according to an embodiment of the present invention. It includes a frame 1: a cylinder 2 is bolted to the surface of the frame 1; a pull wheel 3 is positioned above the cylinder 2; two symmetrically arranged limiting slide rods 4 are welded to the surface of the frame 1, and the surfaces of the limiting slide rods 4 are slidably connected to the pull wheel 3. The limiting slide rods 4 limit the vertical movement of the pull wheel 3, preventing it from wobbling during movement and ensuring its stability. A second cylinder 5 is fixedly installed on the surface of the frame 1, and a crossbar 6 is fixedly connected to the output end of the second cylinder 5 via a flange. A U-shaped groove 7 is welded to the surface of the frame 1; the reinforcing bar 8 to be tested is placed on the top of the frame 1; and a semi-circular block 9 is welded to the surface of the frame 1. The inner diameter of block 9 is adapted to the diameter of the steel bar 8 to be tested. By setting the semi-ring block 9, the contact area between the frame 1 and the steel bar 8 to be tested is increased, thereby ensuring the stability of the position of the steel bar 8 when it is locked on the top of the frame 1. The surface of the U-shaped groove 7 is provided with a sliding groove 10. The inner cavity of the sliding groove 10 is provided with a moving rod 11. The surface of the moving rod 11 is fixedly connected with a vertical rod 12. The bottom end of the vertical rod 12 extends through to the bottom of the U-shaped groove 7 and is fixedly connected to the horizontal rod 6. The surface of the vertical rod 12 is slidably connected to the U-shaped groove 7. The inner wall of the U-shaped groove 7 is rotatably connected with a shaft 14. The surface of the shaft 14 is fixedly connected with a support rod 15. The support rod 15 and the moving rod 11 are rotatably connected to a pressing clamp 16 through a rotating shaft. The tension sensor 18 is fixedly installed between the pull wheel 3 and the output end of the cylinder 2. Example 2

[0026] Figure 1-4This invention illustrates a locking structure for testing the tensile strength of reinforcing bars according to an embodiment of the present invention. It includes a frame 1: a cylinder 2 is bolted to the surface of the frame 1; a pull wheel 3 is positioned above the cylinder 2; a second cylinder 5 is fixedly mounted to the surface of the frame 1; a crossbar 6 is fixedly connected to the output end of the second cylinder 5 via a flange; a U-shaped groove 7 is welded to the surface of the frame 1; a reinforcing bar 8 to be tested is placed on the top of the frame 1; a sliding groove 10 is formed on the surface of the U-shaped groove 7; a moving rod 11 is arranged inside the sliding groove 10; a vertical rod 12 is fixedly connected to the surface of the moving rod 11; a sleeve 13 is rotatably connected to the surface of the moving rod 11; the surface of the sleeve 13 fits against the inner wall of the sliding groove 10; and the sleeve 13, through its arrangement, controls the movement of the moving rod 11 and the sliding groove 10. The inner walls of the U-shaped groove 7 are spaced apart to avoid excessive wear when they are in direct contact, thus extending their service life. The inner wall of the U-shaped groove 7 is rotatably connected to the shaft 14, and the surface of the shaft 14 is fixedly connected to the support rod 15. The support rod 15 and the moving rod 11 are rotatably connected to the compression clamp 16 through the rotating shaft. The surface of the frame 1 is fixedly connected to the limit slide rod 2 17, the top of the limit slide rod 2 17 extends through to the top of the crossbar 6, and the limit slide rod 2 17 is slidably connected to the crossbar 6. The limit slide rod 2 17 limits the movement of the crossbar 6 in the vertical direction, ensuring the stability of the crossbar 6 during movement. The tension sensor 18 is fixedly installed between the pull wheel 3 and the output end of the cylinder 2.

[0027] Working principle: When using this utility model, the user places the steel bar 8 to be tested on the top of the frame 1 and lets it pass through the pull wheel 3. Then, the cylinder 2 5 is activated, which drives the vertical rod 12 to move upward through the horizontal rod 6. The vertical rod 12 then drives the moving rod 11 to move upward in the inner cavity of the slide groove 10. The moving rod 11 drives the support rod 15 to rotate around the shaft 14 through the squeezing clamp 16. During this process, the support rod 15 flips and presses the steel bar 8 to be tested firmly and locks it on the top of the frame 1 through the limiting effect of the shaft 14. Then, the cylinder 2 drives the tension sensor 18 and the pull wheel 3 to move downward. The tension sensor 18 then detects the tension force applied to the surface of the steel bar 8 by the pull wheel 3 in real time and transmits it to the control box on the surface of the frame 1. This realizes the rapid fixation of the steel bar to be tested on the surface of the test frame, thereby ensuring the stability of the position of the two ends of the steel bar during the tensile test and effectively improving the efficiency of disassembly and assembly before and after the test of the two ends of the steel bar.

[0028] In summary, this locking structure for testing the tensile strength of reinforcing bars uses a horizontal bar 6 to move the vertical bar 12 upwards. The vertical bar 12 then moves the support bar 15 around the axis 14 via the moving bar 11 and the clamping block 16. The support bar 15 then presses and locks the reinforcing bar 8 to be tested onto the top of the frame 1. This achieves the goal of quickly fixing the reinforcing bar to be tested onto the surface of the test frame, thus ensuring the stability of the two ends of the reinforcing bar during the tensile test and effectively improving the efficiency of disassembly and assembly before and after testing the two ends of the reinforcing bar.

Claims

1. A locking structure for testing the tensile strength of reinforcing bars, characterized in that, The frame includes a frame (1): a cylinder (2) is bolted to the surface of the frame (1), a puller (3) is installed above the cylinder (2), a cylinder (5) is fixedly installed on the surface of the frame (1), a crossbar (6) is fixedly connected to the output end of the cylinder (5) through a flange, a U-shaped groove (7) is welded to the surface of the frame (1), a steel bar (8) to be tested is placed on the top of the frame (1), and a sliding groove (10) is opened on the surface of the U-shaped groove (7). The inner cavity of the slide (10) is provided with a moving rod (11), and a vertical rod (12) is fixedly connected to the surface of the moving rod (11). The inner wall of the U-shaped groove (7) is rotatably connected with a shaft (14), and a support rod (15) is fixedly connected to the surface of the shaft (14). The support rod (15) and the moving rod (11) are rotatably connected together by a rotating shaft and a pressing clamp (16). A tension sensor (18) is fixedly installed between the pull wheel (3) and the output end of the cylinder (2).

2. The locking structure for testing the tensile strength of reinforcing bars according to claim 1, characterized in that, The frame (1) has two symmetrically arranged limiting slide rods (4) welded to its surface, and the surface of the limiting slide rods (4) is slidably connected to the pull wheel (3).

3. The locking structure for testing the tensile strength of reinforcing bars according to claim 2, characterized in that, The surface of the frame (1) is welded with a semi-ring block (9), the inner diameter of which is matched with the diameter of the steel bar (8) to be tested.

4. The locking structure for testing the tensile strength of reinforcing bars according to claim 3, characterized in that, The bottom end of the vertical rod (12) extends through the U-shaped groove (7) and is fixedly connected to the horizontal rod (6). The surface of the vertical rod (12) is slidably connected to the U-shaped groove (7).

5. The locking structure for testing the tensile strength of reinforcing bars according to claim 4, characterized in that, The surface of the moving rod (11) is rotatably connected to a sleeve (13), and the surface of the sleeve (13) is in contact with the inner wall of the groove (10).

6. The locking structure for testing the tensile strength of reinforcing bars according to claim 5, characterized in that, The surface of the frame (1) is fixedly connected to a limiting slide rod two (17), the top end of the limiting slide rod two (17) extends through to the top of the crossbar (6), and the limiting slide rod two (17) and the crossbar (6) are slidably connected.

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