A prefabricated building sleeve grouting quality detection device

Abstract

The application relates to a prefabricated building sleeve grouting quality detection device, belonging to the prefabricated building detection technical field, which comprises a base, a support is fixedly arranged on the base, a sliding groove is arranged on the support in the horizontal direction, a sliding frame is slidably connected to the sliding groove, a lead screw is rotationally arranged in the sliding groove, the lead screw is threadedly connected with the sliding frame, a first motor is fixedly arranged at the end of the sliding groove, and the driving shaft of the first motor is coaxially fixed with the lead screw; a first swing rod extending downward is rotationally arranged at the bottom of the sliding frame, a sensor is fixedly arranged at the end of the first swing rod away from the sliding frame; a second swing rod extending upward is rotationally arranged at the top of the sliding frame, and a knocking head is fixedly arranged at the end of the second swing rod away from the sliding frame. The application has the effect that the distance between the sensor and the knocking position is consistent after each position adjustment, so that the detection errors at the sleeve grouting points are as consistent as possible.

Description

Technical Field

[0001] This application relates to the field of prefabricated building testing technology, and in particular to a prefabricated building sleeve grouting quality testing device. Background Technology

[0002] Precast concrete structures are composed of various prefabricated components. As a crucial connection technology in the construction of precast buildings, sleeve grouting for vertical or horizontal structural connections has become a hot topic in construction due to its wide applicability, short anchorage length, and high reliability, as well as its high positioning accuracy requirements, grouting difficulty, and challenges in quality inspection. The density of the grout filling in the sleeve directly affects the connection quality between components. The impact-echo method is a commonly used method for inspecting building components. It generates low-frequency stress waves through a short-duration mechanical impact (such as lightly tapping the concrete surface with a small hammer). These stress waves propagate into the building component and are reflected back by defects and another plane of the component. These reflected waves are received by sensors, and the density of the grout filling in the sleeve is determined by analyzing the reflected wave signals.

[0003] Currently, when using the impact echo method to inspect the grouting quality of precast concrete shear wall sleeves, it is necessary to test multiple grouting points on the shear wall sleeves. Therefore, it is necessary to change the sensor position and tapping position multiple times to improve the accuracy of quality inspection. However, by manually adjusting the position, it is difficult to guarantee the distance between the sensor and the tapping position after each adjustment. This can lead to large error fluctuations in the test results at each sleeve grouting point, thus affecting the accuracy of the inspection. Utility Model Content

[0004] To ensure that the distance between the sensor and the tapping position remains consistent after each position adjustment, and to make the error of the detection results at each sleeve grouting point as consistent as possible, this application provides a prefabricated building sleeve grouting quality detection device.

[0005] The technical solution for the prefabricated building sleeve grouting quality testing device provided in this application is as follows:

[0006] A prefabricated building sleeve grouting quality inspection device includes a base, a bracket fixedly mounted on the base, a horizontally oriented groove on the bracket, a slide frame slidably connected to the groove, a lead screw rotatably mounted within the groove and threadedly connected to the slide frame, a first motor fixedly mounted at the end of the groove, and the drive shaft of the first motor coaxially fixed with the lead screw; a downwardly extending first swing arm rotatably mounted at the bottom of the slide frame, with a sensor fixedly mounted at the end of the first swing arm away from the slide frame; and an upwardly extending second swing arm rotatably mounted at the top of the slide frame, with a striking head fixedly mounted at the end of the second swing arm away from the slide frame.

[0007] By adopting the above technical solution, when it is necessary to change the sensor position and the striking position, the first motor drives the lead screw to rotate, causing the slide to slide horizontally along the slide groove, thereby achieving synchronous position adjustment of the sensor and the striking head. Then, the first swing arm is pressed down to keep the sensor in contact with the shear wall surface. Then, the second swing arm is moved to make the striking head collide with the wall surface and generate stress waves. The stress waves propagate through the internal components of the wall surface and are finally received by the sensor. This ensures that the distance between the sensor and the striking position is consistent after each position adjustment, so that the error of the detection results at each sleeve grouting point is as consistent as possible, thereby improving the accuracy of the detection.

[0008] Preferably, the slide is provided with a swing assembly for driving the first swing arm to rotate. The swing assembly includes a rotating disk, a pressing boss, and a second motor. The second motor is fixedly connected to the slide. The rotating disk is coaxially fixed on the drive shaft of the second motor. The pressing boss is fixedly disposed on the end face of the rotating disk along an arc direction. Inclined portions are provided on both sides of the pressing boss. A smooth surface is provided in the middle of the pressing boss. The smooth surface is parallel to the end face of the rotating disk. The side wall of the first swing arm abuts against the inclined portion or smooth surface of the pressing boss.

[0009] By adopting the above technical solution, the second motor drives the rotating disk to rotate, and the pressing boss moves with the rotating disk. When the inclined part contacts the first swing rod, it pushes the first swing rod to swing away from the rotating disk until the sensor contacts the wall surface. At this time, the smooth surface begins to contact the first swing rod, and the sensor maintains contact with the wall surface. In this way, the contact action and contact state between the sensor and the wall surface are maintained, and the detection error caused by the fluctuation caused by the manual pressing pressure is avoided as much as possible.

[0010] Preferably, the swing assembly further includes a first torsion spring disposed between the carriage and the first swing arm, the first torsion spring driving the first swing arm to approach the pressing boss.

[0011] By adopting the above technical solution, when the first torsion spring disengages from the smooth surface and contacts the first swing arm, it drives the first swing arm to deflect away from the wall. At this time, the sensor maintains a certain distance from the wall, preventing the sensor from contacting the wall during the movement of the carriage and causing damage to the sensor.

[0012] Preferably, the swing assembly further includes a roller that rotates on the first swing arm, and the peripheral wall of the roller abuts against the inclined portion or smooth surface of the pressing boss.

[0013] By adopting the above technical solution, the roller transforms the sliding friction between the first pendulum rod and the pressing boss into rolling friction, reducing resistance, making the movement of the first pendulum rod smoother, reducing mechanical wear, and improving the transmission accuracy of the force of the pressing boss to the pendulum rod.

[0014] Preferably, a limiting block is fixedly provided on the carriage, and the limiting block is located on the side of the first swing arm away from the rotating disk, so that the first swing arm can abut against the limiting block.

[0015] By adopting the above technical solution, the limiting block physically constrains the maximum swing angle of the first swing rod, preventing excessive pressure on the sensor from contacting the wall when there are debris or other foreign objects between the first swing rod and the pressing boss, thus preventing damage to the sensor. This ensures that the sensor is always within the preset working range and guarantees the mechanical safety of the detection device.

[0016] Preferably, a striking protrusion is fixedly provided on the end face of the rotating disk. When the smooth surface of the protrusion abuts against the first swing arm, the striking protrusion can abut against the side wall of the second swing arm and drive the second swing arm to swing.

[0017] By adopting the above technical solution, when the smooth surface abuts against the first pendulum, the sensor remains in contact with the wall. As the rotating disk continues to rotate, the striking protrusion rotates until it abuts against the second pendulum and then disengages, realizing the rapid striking of the wall by the striking head. This achieves the timing linkage between the sensor pressing action and the striking action of the striking head, ensuring that the sensor is in contact with the wall each time the stress wave is excited, and eliminating the detection error caused by asynchronous human operation.

[0018] Preferably, a second torsion spring is provided between the carriage and the second rocker arm, and the second torsion spring drives the second rocker arm to approach the rotating disk.

[0019] By adopting the above technical solution, the second torsion spring drives the second swing arm to quickly return to its original position after the strike, ensuring that the striking head automatically detaches from the wall surface after each strike, minimizing residual contact that could affect the stress wave propagation characteristics, and providing constant initial potential energy for the next strike.

[0020] Preferably, positioning plates are fixedly provided at both ends of the bracket, and the positioning plates are used to abut against the shear wall.

[0021] By adopting the above technical solution, the positioning plate forms a surface contact positioning with the shear wall, realizing the benchmark alignment function during device installation, ensuring the initial distance between the sensor, the tapping head and the wall surface, and helping to ensure that the movement trajectory of the sensor and the tapping head is always parallel to the distribution line of the sleeve grouting point, eliminating the detection error caused by the tilt of the device relative to the wall surface.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting up a chute, slide frame, lead screw, first motor, first swing arm, sensor, second swing arm, and striking head, the synchronous adjustment of the sensor and striking head positions is achieved, ensuring that the distance between the sensor and striking head is consistent after each position adjustment, minimizing distance deviation caused by manual adjustment, reducing the error range of the detection results at each sleeve grouting point, and improving the accuracy and reliability of the detection data.

[0024] 2. By setting up a swing assembly, a rotating disk, a pressing boss, an inclined part, a smooth surface, a second motor, a first torsion spring, a roller, and a limiting block, the second motor drives the rotating disk, and the inclined part of the pressing boss pushes the first swing rod to release the sensor from the wall. The smooth surface of the pressing boss and the limiting block maintain the stability of the first swing rod, keeping the sensor in contact with the wall and reducing the difference in the force of manual pressing.

[0025] 3. By setting the tapping protrusion and the second torsion spring, the timing linkage between the sensor pressing against the wall and the tapping head tapping the wall is realized, ensuring that the sensor is in contact with the wall every time the tapping head taps the wall and generates a stress wave. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a prefabricated building sleeve grouting quality testing device provided in the embodiments of this application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Base; 2. Bracket; 21. Slide groove; 22. Lead screw; 23. First motor; 3. Carriage; 31. First swing arm; 311. Sensor; 32. Second swing arm; 321. Striking head; 4. Swing assembly; 41. Rotary disk; 411. Pressing boss; 4111. Smooth surface; 4112. Inclined part; 412. Striking protrusion; 42. Limiting block; 43. Second motor; 44. First torsion spring; 45. Roller; 46. Second torsion spring; 5. Positioning plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a device for detecting the grouting quality of prefabricated building sleeves. (Refer to...) Figure 1 It includes a base 1, which provides a supporting foundation for the entire device. A bracket 2 is fixedly installed on the base 1, and positioning plates 5 are fixedly installed at both ends of the bracket 2. The positioning plates 5 are used to abut against the wall surface of the shear wall to ensure the distance between the bracket 2 and the wall surface of the shear wall.

[0031] Reference Figure 1 and Figure 2 The support 2 has a horizontal groove 21, and the slide 3 is slidably connected to the groove 21. Specifically, the slide 3 includes a slider and a movable plate. The slider slides in the groove 21 to provide guidance for the horizontal movement of the slide 3. The movable plate is fixed on the side of the slider facing the shear wall.

[0032] Reference Figure 1 and Figure 2 A lead screw 22 is rotatably mounted inside the slide groove 21. The lead screw 22 is threadedly connected to the slider on the slide frame 3. A first motor 23 is fixedly mounted at the end of the slide groove 21. The drive shaft of the first motor 23 is coaxially fixed with the lead screw 22. When the first motor 23 starts, it drives the lead screw 22 to rotate, and using the thread transmission principle, it drives the slide frame 3 to slide horizontally within the slide groove 21.

[0033] Reference Figure 1 and Figure 2 The slide 3 has a first swing arm 31 extending downwards rotatably at the bottom of its movable plate. A sensor 311 is fixedly mounted at the end of the first swing arm 31 away from the slide 3. The sensor 311 is used to detect the reaction wave generated when the wall is struck. The slide 3 has a second swing arm 32 extending upwards rotatably at the top of its movable plate. A striking head 321 is fixedly mounted at the end of the second swing arm 32 away from the slide 3. The rotation axes of both the first swing arm 31 and the second swing arm 32 are parallel to the axis of the lead screw 22.

[0034] To facilitate control over whether sensor 311 contacts the shear wall, refer to Figure 2The slide 3 is equipped with a swing assembly 4 for driving the first swing arm 31 to rotate. The swing assembly 4 includes a rotating disk 41, a pressing boss 411, a second motor 43, a first torsion spring 44, a limiting block 42, and a roller 45. The second motor 43 is fixedly connected to the slide 3, and the rotating disk 41 is coaxially fixed to the drive shaft of the second motor 43. The rotating disk 41 is located on the side of the slide 3 away from the shear wall. The pressing boss 411 is fixedly arranged on the end face of the rotating disk 41 along an arc direction. The first torsion spring 44 is arranged between the slide 3 and the first swing arm 31, and the first torsion spring 44 drives the first swing arm 31 to approach the pressing boss 411.

[0035] Reference Figure 2 Inclined portions 4112 are inclined on both sides of the protrusion 411, and a smooth surface 4111 is provided in the middle of the protrusion 411. The smooth surface 4111 is parallel to the end face of the rotating disk 41 and is connected to the inclined portions 4112. The side wall of the first rocker arm 31 abuts against the inclined portion 4112 or the smooth surface 4111 of the protrusion 411. Specifically, the roller 45 rotates on the first rocker arm 31, and the peripheral wall of the roller 45 abuts against the inclined portion 4112 or the smooth surface 4111 of the protrusion 411. The limiting block 42 is located on the side of the first rocker arm 31 away from the rotating disk 41. The first rocker arm 31 can abut against the limiting block 42. When the smooth surface 4111 abuts against the roller 45, the limiting block 42 and the smooth surface 4111 together constrain both sides of the first rocker arm 31, so that the sensor 311 contacts the wall surface with a constant pressure.

[0036] To ensure that the striking head 321 strikes the wall only when the sensor 311 contacts the wall, refer to Figure 1 and Figure 2 A striking protrusion 412 is fixedly provided on the end face of the rotating disk 41. When the smooth surface 4111 of the protrusion 411 abuts against the first swing arm 31, the striking protrusion 412 abuts against the side wall of the second swing arm 32, causing the second swing arm 32 to swing. In this embodiment, the end of the striking protrusion 412 away from the rotating disk 41 is set as an arc surface, which is used to guide the second swing arm 32 to deflect and pass over the striking protrusion 412. After the protrusion 411 pushes the first swing arm 31 to drive the sensor 311 to contact the wall, that is, when the smooth surface 4111 abuts against the roller 45, as the rotating disk 41 continues to rotate, the striking protrusion 412 rotates to abut against the second swing arm 32 and then quickly disengages, causing the second swing arm 32 to rotate around the hinge point and drive the striking head 321 to strike the wall, ensuring that the striking head 321 strikes the wall only when the sensor 311 is in contact with the wall. A second torsion spring 46 is provided between the slide 3 and the second swing arm 32. The second torsion spring 46 drives the second swing arm 32 to approach the rotating disk 41. After the tapping protrusion 412 passes the second swing arm 32, the second torsion spring 46 drives the second swing arm 32 to quickly move away from the wall.

[0037] The implementation principle of the prefabricated building sleeve grouting quality detection device according to an embodiment of this application is as follows: In use, the positioning plate 5 first abuts against the wall surface of the shear wall to determine the placement position of the base 1. When it is necessary to detect each sleeve grouting point of the shear wall, the first motor 23 drives the lead screw 22 to rotate, causing the slide 3 to slide horizontally along the slide groove 21, so that the sensor 311 and the tapping head 321 move synchronously to the target detection position. After reaching the target position, the second motor 43 drives the rotating disk 41 to rotate, and the pressing boss 411 rotates synchronously with the rotating disk 41. One of the inclined parts 4112 of the pressing boss 411 contacts the roller 45 on the first swing rod 31. The inclined part 4112 pushes the first swing rod 31 to swing away from the rotating disk 41 around the hinge point until the sensor 311 contacts the wall surface. At this point, the smooth surface 4111 of the protrusion 411 begins to contact the roller 45. As the rotating disk 41 continues to rotate, the striking protrusion 412 contacts the second swing arm 32 and then passes over it. During this process, the striking protrusion 412 forces the second swing arm 32 to swing, and the striking head 321 impacts the wall to generate a stress wave. The stress wave propagates through the grouting point inside the wall and is received by the sensor 311. The host connected to the sensor 311 analyzes the waveform to determine the quality of the grouting point. As the rotating disk 41 continues to rotate, another inclined portion 4112 of the protrusion 411 contacts the roller 45. At this point, the sensor 311 is not in contact with the wall, and the slide 3 can move. At the next detection position, the second motor 43 drives the rotating disk 41 to rotate in the opposite direction, causing the roller 45 to return from the other inclined portion 4112 of the protrusion 411 to one of the inclined portions 4112 of the protrusion 411. This ensures that the distance between sensor 311 and the striking position remains consistent after each position adjustment, so that the error of the detection results at each sleeve grouting point is as consistent as possible.

[0038] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for detecting the grouting quality of prefabricated building sleeves, characterized in that: The system includes a base (1), on which a bracket (2) is fixedly mounted. A horizontal groove (21) is provided on the bracket (2), and a slide frame (3) is slidably connected to the groove (21). A lead screw (22) is rotatably mounted inside the groove (21), and the lead screw (22) is threadedly connected to the slide frame (3). A first motor (23) is fixedly mounted at the end of the groove (21), and the drive shaft of the first motor (23) is coaxially fixed with the lead screw (22). A first swing arm (31) extending downward is rotatably mounted at the bottom of the slide frame (3), and a sensor (311) is fixedly mounted at the end of the first swing arm (31) away from the slide frame (3). A second swing arm (32) extending upward is rotatably mounted at the top of the slide frame (3), and a striking head (321) is fixedly mounted at the end of the second swing arm (32) away from the slide frame (3).

2. The prefabricated building sleeve grouting quality testing device according to claim 1, characterized in that: The slide (3) is provided with a swing assembly (4) for driving the first swing arm (31) to rotate. The swing assembly (4) includes a rotating disk (41), a pressing boss (411), and a second motor (43). The second motor (43) is fixedly connected to the slide (3). The rotating disk (41) is coaxially fixed on the drive shaft of the second motor (43). The pressing boss (411) is fixedly arranged on the end face of the rotating disk (41) along the arc direction. Inclined portions (4112) are provided on both sides of the pressing boss (411). A smooth surface (4111) is provided in the middle of the pressing boss (411). The smooth surface (4111) is parallel to the end face of the rotating disk (41). The side wall of the first swing arm (31) abuts against the inclined portion (4112) or the smooth surface (4111).

3. The prefabricated building sleeve grouting quality testing device according to claim 2, characterized in that: The swing assembly (4) further includes a first torsion spring (44), which is disposed between the slide (3) and the first swing arm (31). The first torsion spring (44) drives the first swing arm (31) to approach the pressing boss (411).

4. The prefabricated building sleeve grouting quality testing device according to claim 2, characterized in that: The swing assembly (4) also includes a roller (45) that rotates on the first swing arm (31), and the peripheral wall of the roller (45) abuts against the inclined portion (4112) or the smooth surface (4111).

5. The prefabricated building sleeve grouting quality testing device according to claim 2, characterized in that: A limiting block (42) is fixedly installed on the slide (3). The limiting block (42) is located on the side of the first swing rod (31) away from the rotating disk (41). The first swing rod (31) can abut against the limiting block (42).

6. The prefabricated building sleeve grouting quality testing device according to claim 2, characterized in that: The rotating disk (41) has a tapping protrusion (412) fixedly provided on its end face. When the smooth surface (4111) of the protrusion (411) is pressed against the first swing rod (31), the tapping protrusion (412) can abut against the side wall of the second swing rod (32) and drive the second swing rod (32) to swing.

7. The prefabricated building sleeve grouting quality testing device according to claim 2, characterized in that: A second torsion spring (46) is provided between the slide (3) and the second rocker arm (32), and the second torsion spring (46) drives the second rocker arm (32) to approach the rotating disk (41).

8. The prefabricated building sleeve grouting quality testing device according to claim 1, characterized in that: The bracket (2) is fixedly provided with positioning plates (5) at both ends, and the positioning plates (5) are used to abut against the shear wall.

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