Performance detection device for grouting joint of reinforcing steel bar sleeve

Abstract

The utility model discloses a reinforcing steel bar sleeve grouting joint performance detection device, which belongs to the technical field of reinforcing steel bar sleeve testing, and comprises an upper clamping assembly, a lower clamping assembly and a dial indicator, the upper clamping assembly is in sliding connection with the lower clamping assembly, the lower clamping assembly comprises two parallel lower vertical rods, and the dial indicator is arranged on the lower vertical rods. A lower clamping piece used for clamping a connector is arranged between the lower ends of the two lower vertical rods, a fixing plate is fixedly installed on one side of the upper end of each lower vertical rod, and a sliding groove is formed in each fixing plate. According to the reinforcing steel bar sleeve grouting joint performance detection device, through relative sliding of the upper vertical rod and the lower vertical rod, the device can adapt to joints with different lengths; coarse adjustment of the upper mounting plate is realized through the plurality of adjusting holes; the lower mounting plate is driven to move through rotation of the lead screw, fine adjustment of the lower mounting plate is achieved, compared with an existing device, the problem that the distance between fixed measuring plates cannot meet the application range of a dial indicator possibly is solved, the adaptive capacity of the device is improved, and the measuring efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel bar sleeve testing, and particularly relates to a performance detection device for a steel bar sleeve grouting joint. Background Technique

[0002] A prefabricated building refers to a building formed by connecting precast concrete components through steel bars, connectors, etc. and pouring concrete on site, belonging to the category of residential industrialization and residential industrialization. The steel bar connection technology is one of the key technologies for prefabricated buildings. A reliable connection is the key to ensuring the structural integrity and seismic resistance. At present, the connection methods adopted in China's prefabricated buildings are sleeve connection, grouting anchor connection, and mechanical connection. Among them, the sleeve grouting connection method is mostly used. The steel bar sleeve grouting connection joint is composed of ribbed steel bars, grouting sleeves, and special grouting materials.

[0003] The steel bar sleeve grouting connection joint should meet the requirements of strength and deformation performance. Before grouting construction, joint process inspection should be carried out on the steel bars from different steel bar production enterprises when they enter the site. During the construction process, when the steel bar production enterprise is changed, or when the shape and size of the steel bars produced by the same production enterprise are significantly different from those of the steel bars for which the process inspection has been completed, process inspection should be carried out again. The centering unidirectional tensile test and the compressive strength test of the grouting material should be carried out. Among them, the residual deformation of the joint is a very important parameter in the unidirectional tensile test. The test is carried out according to the unidirectional tensile loading system for type inspection specified in Appendix A of JGJ 107-2016 "Technical Specification for Mechanical Connection of Steel Bars".

[0004] The existing performance detection devices for steel bar sleeve grouting joints are difficult to adapt to joints of different lengths. Due to the limited stroke of the measuring rod of the dial indicator, when testing joints of different lengths, the fixed distance between the measuring plates may not meet the applicable range of the dial indicator. At this time, it is necessary to replace the dial indicator or the detection device, resulting in low efficiency.

[0005] Therefore, we propose a performance detection device for a steel bar sleeve grouting joint to solve the above problems. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the problem in the prior art that it is difficult to adapt to joints of different lengths, and to propose a performance detection device for a steel bar sleeve grouting joint.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A performance detection device for a steel bar sleeve grouting joint, including an upper clamping assembly, a lower clamping assembly, and a dial indicator. The upper clamping assembly and the lower clamping assembly are slidably connected;

[0009] The lower clamping assembly includes two parallel lower vertical rods. A lower clamping member for clamping the joint is provided between the lower ends of the two lower vertical rods. One side of the upper end of each lower vertical rod is fixedly installed with a fixing plate. A chute is formed in the fixing plate, and a lead screw is rotatably provided in the chute. A lower mounting plate threadedly sleeved on the lead screw is slidably provided on the fixing plate. A driving assembly for driving the rotation and locking of the lead screw is provided on the bottom surface of the fixing plate;

[0010] The upper clamping assembly includes two parallel upper vertical rods. An upper clamping member for clamping the joint is provided between the upper ends of the two upper vertical rods. The upper vertical rods are slidably sleeved inside the upper ends of the lower vertical rods. A plurality of adjustment holes are formed in the side surfaces of the upper vertical rods. The upper mounting plate is detachably connected to the upper vertical rods through the adjustment holes;

[0011] The dial indicator is fixedly installed on the lower mounting plate, and the measuring rod end of the dial indicator passes through the lower mounting plate and abuts against the bottom surface of the upper mounting plate.

[0012] Preferably, the lower end of the lead screw extends to the outside of the fixing plate and is fixedly sleeved with a positioning block. The lower end of the positioning block is fixedly connected with a limiting block through a connecting rod. A knob is sleeved outside the limiting block. A limiting cavity for the limiting block to rotate and move is formed inside the knob. A positioning hole for cooperating with the positioning block is formed in the upper end of the knob. A connecting hole for the connecting rod to pass through is formed between the cavity and the positioning hole.

[0013] Preferably, the top surface of the limiting block is larger than the connecting hole, and there is a distance between the side surface of the limiting block and the side surface of the limiting cavity.

[0014] Preferably, the positioning block is in a polygonal column shape, and the positioning hole fits the positioning block.

[0015] Preferably, when the limiting block is located at the upper end of the limiting cavity, the positioning block is separated from the positioning hole; when the limiting block is located at the lower end of the limiting cavity, the positioning block cooperates with the positioning hole.

[0016] Preferably, the upper mounting plate is in an L shape, and the upper mounting plate is bolted to the upper vertical rod in cooperation with the adjustment holes.

[0017] In summary, the technical effects and advantages of the present utility model: For this performance detection device for the steel bar sleeve grouting joint, through the relative sliding of the upper vertical rod and the lower vertical rod, it is adapted to joints of different lengths; through a plurality of adjustment holes, rough adjustment of the upper mounting plate is realized; through the rotation of the lead screw to drive the movement of the lower mounting plate, fine adjustment of the lower mounting plate is realized. Compared with the existing devices, it avoids the problem that the distance between the fixed measuring plates may not meet the applicable range of the dial indicator, improves the adaptability of the device, and improves the measurement efficiency.

[0018] In addition, the rotation of the lead screw is achieved by the cooperation of the knob with the positioning hole and the positioning block; the separation of the positioning hole and the positioning block is realized by the downward movement of the knob, avoiding the influence of misoperation on the measurement of the micrometer and improving the stability of the device. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the present utility model;

[0020] Figure 2 is Figure 1 the enlarged view at A in

[0021] Figure 3 is Figure 2 the enlarged view at B in

[0022] Figure 4 is Figure 3 the front sectional view after the knob moves downward in

[0023] In the figure: 1, upper clamping assembly; 2, lower clamping assembly; 3, micrometer; 4, lower vertical rod; 5, lower clamping part; 6, fixing plate; 7, chute; 8, lead screw; 9, lower mounting plate; 10, upper vertical rod; 11, upper clamping part; 12, adjustment hole; 13, upper mounting plate; 14, positioning block; 15, connecting rod; 16, limit block; 17, knob; 18, limit cavity; 19, positioning hole. Detailed Embodiment

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0025] Referring to Figures 1-3 , a performance detection device for a reinforced sleeve grouting joint, includes an upper clamping assembly 1, a lower clamping assembly 2 and a micrometer 3. The upper clamping assembly 1 and the lower clamping assembly 2 are slidably connected;

[0026] The lower clamping assembly 2 includes two parallel lower vertical rods 4. A lower clamping part 5 for clamping the joint is provided between the lower ends of the two lower vertical rods 4. One side of the upper end of the lower vertical rod 4 is fixedly installed with a fixing plate 6. A chute 7 is opened on the fixing plate 6, and a lead screw 8 is rotatably provided in the chute 7. A lower mounting plate 9 threadedly sleeved on the lead screw 8 is slidably provided on the fixing plate 6. A driving assembly for driving the rotation and locking of the lead screw 8 is provided on the bottom surface of the fixing plate 6;

[0027] The upper clamping assembly 1 includes two parallel upper vertical rods 10. An upper clamping part 11 for clamping the joint is provided between the upper ends of the two upper vertical rods 10. The upper vertical rod 10 is slidably sleeved inside the upper end of the lower vertical rod 4. A plurality of adjustment holes 12 are opened on the side surface of the upper vertical rod 10. The upper vertical rod 10 is detachably connected with an upper mounting plate 13 through the adjustment holes 12;

[0028] The upper clamping part 11 and the lower clamping part 5 are prior arts, including a cross bar, a clamping frame and a locking bolt.

[0029] The dial indicator 3 is fixedly installed on the lower mounting plate 9, and the measuring rod end of the dial indicator 3 passes through the lower mounting plate 9 and fits against the bottom surface of the upper mounting plate 13.

[0030] When installing this performance testing device for the grouting joint of the steel bar sleeve, move the upper vertical rod 10 until the distance between the upper clamping part 11 and the lower clamping part 5 meets the joint length, and clamp the steel bars at both ends of the joint through the upper clamping part 11 and the lower clamping part 5 respectively. At this time, fix the upper mounting plate 13 outside the two adjustment holes 12 at the bottommost of the upper vertical rod 10 through bolts. Then drive the screw rod 8 to rotate through the driving component until the distance between the lower mounting plate 9 and the upper mounting plate 13 is suitable for the measuring range of the dial indicator 3. Install the two dial indicators 3 on the two lower mounting plates 9 respectively, and the measuring rod of the dial indicator 3 fits against the upper mounting plate 13, then the performance test of the joint can be carried out.

[0031] During the test, install the assembled one into the testing machine, and the upper and lower clamps of the testing machine clamp the steel bars at both ends of the joint respectively, then the performance detection of the joint can be carried out.

[0032] The screw rod 8 should use a trapezoidal screw rod with better self-locking ability to avoid the screw rod 8 rotating automatically under force during the measurement process.

[0033] The lower end of the screw rod 8 extends to the outside of the fixed plate 6 and is fixedly sleeved with a positioning block 14. The lower end of the positioning block 14 is fixedly connected with a limiting block 16 through a connecting rod 15. A knob 17 is sleeved outside the limiting block 16. An inner limiting cavity 18 for the limiting block 16 to rotate and move is opened inside the knob 17. A positioning hole 19 for matching with the positioning block 14 is opened at the upper end of the knob 17. A connecting hole for the connecting rod 15 to pass through is opened between the cavity and the positioning hole 19.

[0034] The top surface of the limiting block 16 is larger than the connecting hole, and there is a distance between the side surface of the limiting block 16 and the side surface of the limiting cavity 18. The limiting block 16 can be set as a cylindrical shape, so as to avoid driving the screw rod 8 to rotate through the limiting block 16.

[0035] The positioning block 14 is in a polygonal column shape, and the positioning hole 19 fits with the positioning block 14. In this way, the positioning block 14 drives the screw rod 8 to rotate.

[0036] When the limiting block 16 is located at the upper end of the limiting cavity 18, the positioning block 14 is separated from the positioning hole 19; when the limiting block 16 is located at the lower end of the limiting cavity 18, the positioning block 14 is matched with the positioning hole 19. In this way, when the knob 17 moves upward, the knob 17 can normally drive the screw rod 8 to rotate; after the knob 17 moves downward, the knob 17 is disengaged from the screw rod 8 to avoid the knob 17 being affected by misoperation during the measurement and affecting the measurement of the dial indicator 3.

[0037] The upper mounting plate 13 is L-shaped, and the upper mounting plate 13 is bolted to the upper vertical rod 10 through the adjustment hole 12. Two mounting holes can be provided on the upper mounting plate 13 to cooperate with the adjustment hole 12, so as to prevent the upper mounting plate 13 from being skewed during installation and affecting the measurement of the dial indicator 3.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A steel bar sleeve grouting joint performance detection device, comprising an upper clamping assembly (1), a lower clamping assembly (2) and a micrometer (3), characterized in that: The upper clamping assembly (1) is slidably connected to the lower clamping assembly (2); The lower clamping assembly (2) comprises two parallel lower vertical rods (4), a lower clamping member (5) for clamping a joint is provided between the lower ends of the two lower vertical rods (4), a fixing plate (6) is fixedly installed on one side of the upper end of the lower vertical rod (4), a sliding groove (7) is provided on the fixing plate (6), and a screw rod (8) is rotatably provided in the sliding groove (7), a lower mounting plate (9) which is threadedly sleeved on the screw rod (8) is slidably provided on the fixing plate (6), and a driving assembly for driving the screw rod (8) to rotate and lock is provided on the bottom surface of the fixing plate (6); The upper clamping assembly (1) comprises two parallel upper vertical rods (10), an upper clamping piece (11) for clamping the joint is arranged between the upper ends of the two upper vertical rods (10), the upper vertical rod (10) is slidably sleeved inside the upper end of the lower vertical rod (4), a plurality of adjustment holes (12) are opened on the side of the upper vertical rod (10), and the upper vertical rod (10) is detachably connected to an upper mounting plate (13) through the adjustment holes (12); The micrometer (3) is fixedly mounted on the lower mounting plate (9), and the measuring rod end of the micrometer (3) passes through the lower mounting plate (9) and fits against the bottom surface of the upper mounting plate (13).

2. A steel sleeve grouting joint performance detection device according to claim 1, characterized in that: The lower end of the screw rod (8) extends to the outside of the fixed plate (6) and is fixedly sleeved with a positioning block (14); the lower end of the positioning block (14) is fixedly connected to a limiting block (16) through a connecting rod (15); a knob (17) is sleeved on the outside of the limiting block (16); a limiting cavity (18) is provided inside the knob (17) for the limiting block (16) to rotate and move; a positioning hole (19) matching the positioning block (14) is provided at the upper end of the knob (17); a connecting hole for the connecting rod (15) to pass through is provided between the cavity and the positioning hole (19).

3. A steel sleeve grouting joint performance detection device according to claim 2, characterized in that: The top surface of the limiting block (16) is larger than the connecting hole, and the side surface of the limiting block (16) is spaced apart from the side surface of the limiting cavity (18).

4. A steel sleeve grouting joint performance detection device according to claim 3, characterized in that: The positioning block (14) is in the shape of a polygonal column, and the positioning hole (19) matches the positioning block (14).

5. A steel sleeve grouting joint performance detection device according to claim 4, characterized in that: When the limit block (16) is located at the upper end of the limit cavity (18), the positioning block (14) is separated from the positioning hole (19); when the limit block (16) is located at the lower end of the limit cavity (18), the positioning block (14) is matched with the positioning hole (19).

6. A steel sleeve grouting joint performance detection device according to claim 1, characterized in that: The upper mounting plate (13) is L-shaped, and the upper mounting plate (13) is bolted to the upper vertical rod (10) in cooperation with the adjustment hole (12).

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