Fabricated precast concrete member joint surface roughness detection device

Abstract

The utility model relates to the technical field of assembly type concrete member testing, in particular to an assembly type precast concrete member joint surface roughness detection device, which comprises a base, a driving mechanism, a cross rod and a depth measurement component, and is characterized in that the base comprises a bottom plate and two side plates, a plurality of through holes are formed in the bottom plate, and the bottom plate is made of transparent materials; the side plates are oppositely arranged on the two sides of the bottom plate at intervals, the two ends of the transverse rod are arranged on the two side plates in a sliding mode, and the transverse rod is horizontally arranged. The driving end of the driving mechanism is connected with the transverse rod and drives the transverse rod to move along the length axis of the side plate. According to the utility model, the batch automatic detection of the roughness of the concrete joint surface can be realized, the labor is effectively reduced, and the accuracy and the efficiency of the test are obviously improved, so that the problems that the roughness detection of the joint surface of an assembly type sleeve concrete member needs single-point measurement in sequence, the test efficiency is low, the inclined plane is inconvenient to measure and the like can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled concrete component testing, in particular to a device for detecting the roughness of a joint surface of an assembled prefabricated concrete component. Background Art

[0002] Prefabricated structure is the abbreviation of prefabricated concrete structure, which is a concrete structure formed by assembling and connecting prefabricated components as the main load-bearing components. Prefabricated concrete structure buildings have the following advantages over cast-in-place concrete buildings: they can improve building quality; improve efficiency; save materials; save energy and reduce emissions; save labor and improve working conditions; shorten construction period; facilitate winter construction, etc. Prefabricated reinforced concrete structure is one of the important directions of building structure development in my country. It is conducive to the development of my country's building industrialization, improve production efficiency, save energy, and develop green and environmentally friendly buildings.

[0003] Adjacent precast concrete shear walls and other components need to be connected by cast-in-place, and a connection interface will be generated between cast-in-place concrete and precast concrete components. The shear resistance of the connection surface is closely related to the seismic performance and overall stability of the structure. The roughness of the connection surface is one of the main factors affecting the shear strength of the connection surface. Therefore, in order to ensure the effective connection between components, it is necessary to conduct a qualitative and quantitative effective evaluation of the roughness of the connection surface of the concrete precast components.

[0004] The detection method of the roughness of the concrete bonding surface has the following problems in practical engineering applications: 1. The concave-convex depth data obtained at different positions in each measurement area shall not be less than 16. The existing technology mainly relies on vernier calipers to perform single-point depth measurements in sequence, which has a large workload and a low degree of automation in data acquisition; 2. The existing technology requires that the vernier caliper must be close to the reference plate and remain perpendicular to the reference plate during measurement. In practice, due to the influence of subjective and objective factors of the operator, there are deviations in the operation, which affects the test efficiency and data accuracy, especially when measuring inclined bonding surfaces, the data deviation is large. In summary, the above problems will lead to deviations in the detection data of the roughness of the bonding surface of concrete components and inconvenient detection, which greatly affects the efficiency and effectiveness of the test. Utility Model Content

[0005] Aiming at the problem that the detection data obtained by manually using a vernier caliper in the prior art is prone to deviation, the utility model provides a device for detecting the roughness of the joint surface of an assembled precast concrete component.

[0006] The utility model is realized by the following technical solutions:

[0007] A device for detecting the roughness of the joint surface of an assembled precast concrete component comprises a base, a driving mechanism, a cross bar and a depth measuring assembly, wherein the base comprises a bottom plate and two side plates, wherein a plurality of through holes are arranged on the bottom plate, and the bottom plate is made of a transparent material; the side plates are arranged at intervals on both sides of the bottom plate relative to each other, and the two ends of the cross bar are slidably arranged on the two side plates, and the cross bar is arranged horizontally; the driving end of the driving mechanism is connected to the cross bar, and drives the cross bar to move along the length axis of the side plate; the depth measuring assembly comprises a laser displacement sensor, a data collector and a processing end, wherein the laser port of the laser displacement sensor faces the bottom plate and is perpendicular to the bottom plate, the laser displacement sensor is fixed on the cross bar, the output end of the laser displacement sensor is connected to the input end of the data collector, and the output end of the data collector is connected to the input end of the processing end.

[0008] Preferably, a plurality of through holes are arranged in a matrix on the bottom plate.

[0009] Preferably, the driving mechanism includes two roller groups and a pull wire, the two roller groups are arranged on the bottom plate and are respectively located on both sides of the cross bar, one end of the pull wire is connected to one of the roller groups, and the other end is connected to the cross bar and then connected to the other roller group.

[0010] Preferably, the roller group includes a support and a rotating roller, the support is fixed on the base plate, and the rotating roller is rotatably set on the support; one end of the pull wire is fixedly connected to the rotating roller, and the other end is connected to the cross bar after being wrapped around the rotating roller for several turns, and then the pull wire is wrapped around and connected to the rotating roller of another roller group.

[0011] Preferably, a rocker is also provided on the rotating roller.

[0012] Preferably, the side panels are provided with tracks along their length axes, and rolling wheels are provided at positions where the crossbars contact the side panels, and the rolling wheels slide along the tracks.

[0013] Preferably, a fixed-point groove is provided on the rail, and the center of the fixed-point groove is aligned with the center of the through hole on the bottom plate.

[0014] Preferably, a plurality of laser displacement sensors are provided.

[0015] Preferably, a plurality of mounting holes are provided on the cross bar, and the laser displacement sensor is connected to the cross bar through the mounting holes; the center of the mounting hole is aligned with the center of the through hole on the bottom plate.

[0016] Preferably, the bottom plate is further provided with a plurality of blind holes, which are arranged along the length axis of the transverse plate, and the blind holes are used for reference calibration of the laser displacement sensor.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a sliding component in a roughness detection device for the joint surface of an assembled precast concrete component, which realizes the flexible change and positioning of the laser displacement sensor along the longitudinal and transverse directions of the transparent porous bottom plate, and can realize the roughness measurement of different hole distances when the measurement area is different, and has a wider range of application. The depth measurement component can realize batch collection and processing of data, and improve the degree of automation. The batch automatic detection of the roughness of the concrete joint surface is realized by the cooperation of the cross bar and the driving mechanism, which effectively reduces the manpower and significantly improves the accuracy and efficiency of the test, thereby solving the problems that the roughness detection of the joint surface of assembled sets of concrete components needs to be measured at single points in sequence, the test efficiency is low, and the inclined surface measurement is inconvenient.

[0019] Furthermore, by rotating the rocker, the roller pulls the pull wire and thus pulls the cross bar to move, and the depth measurement can be carried out when the hole position is reached, thus realizing batch measurement of hole depths.

[0020] Furthermore, the setting of the non-penetrating circular hole realizes the reference positioning of the laser displacement sensor. The sensor is connected to the cross bar to maintain perpendicularity to the reference plate during measurement. When measuring the inclined surface, the verticality is not affected by the tilt angle.

[0021] Furthermore, the positioning groove can assist in positioning and prevent sliding, thereby ensuring the validity of the data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a device for detecting the roughness of the joint surface of an assembled prefabricated concrete component according to the utility model;

[0023] Figure 2 It is a cross-sectional view of a device for detecting the roughness of a joint surface of an assembled precast concrete component according to the utility model;

[0024] Figure 3 It is a schematic diagram of a roller group in a device for detecting the roughness of a joint surface of an assembled precast concrete component of the utility model.

[0025] In the figure, 1, side panel; 2, bottom plate; 3, rocker; 4, roller; 5, blind hole; 6, track; 7, data collector; 8, processing end; 9, positioning groove; 10, rolling wheel; 11, cross bar; 12, laser displacement sensor; 13, pull wire; 14, support; 15, through hole; 16, concrete bonding surface; 17, rolling connecting rod; 18, connecting plate; 19, bolt. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0027] The utility model discloses a device for detecting the roughness of the joint surface of an assembled prefabricated concrete component. Figure 1 , 2 , including a base, a driving mechanism, a crossbar 11 and a depth measuring assembly. The base includes a bottom plate 2 and two side plates 1. The bottom plate 2 is provided with a plurality of through holes 15. The bottom plate 2 is made of a transparent material. The side plates 1 are arranged on both sides of the bottom plate 2 at intervals. In this embodiment, the bottom plate 2 is a 5mm hard plastic plate, and the bottom plate 2 is provided with aligned through holes 15 in a matrix manner; the side plates 1 are bonded to both sides of the bottom plate 2 by epoxy high-strength adhesive, and the thickness is 10mm. The through holes 15 are evenly distributed vertically and horizontally on the bottom plate 2, and the hole diameter is 3mm±0.1mm, and the hole spacing is 10mm±0.5mm.

[0028] The two ends of the crossbar 11 are slidably arranged on the two side panels 1, and the crossbar 11 is arranged horizontally. The side panels 1 are provided with tracks 6 along their length axis. The position where the crossbar 11 contacts the side panels 1 is provided with rolling wheels 10, and the rolling wheels 10 slide along the tracks 6. A fixed-point groove is arranged on the track 6, and the center of the fixed-point groove is aligned with the center of the through hole 15 on the bottom plate 2. In this embodiment, the track 6 is fixedly installed in the middle of the top of the side panel 1, and the depth of the track 6 is 3mm and the width is 3mm. The rolling wheels 10 with a diameter of 15mm are installed at both ends of the crossbar 11, and the rolling wheels 10 are recessed in the track 6 of the side panel 1. In addition, the track 6 is provided with a fixed-point groove, and the position where the fixed-point groove is aligned with the center of the hole has a depth of 4mm, a length of 1mm, and a width of 3mm, which is convenient for positioning the wheels on the crossbar 11 during operation.

[0029] The driving end of the driving mechanism is connected to the crossbar 11, and drives the crossbar 11 to move along the longitudinal axis of the side plate 1; the driving mechanism includes two roller groups and a pull wire 13, the two roller groups are arranged on the bottom plate 2 and are respectively located on both sides of the crossbar 11, one end of the pull wire 13 is connected to one roller group, and the other end is connected to the crossbar 11 and then connected to the other roller group. The roller group includes a support 14 and a rotating roller 4, the support 14 is fixed on the bottom plate 2, and the rotating roller 4 is rotatably arranged on the support 14; one end of the pull wire 13 is fixedly connected to the rotating roller 4, and the other end is connected to the crossbar 11 after being wound around the rotating roller 4 for several turns, and then the pull wire 13 is wound around the rotating roller 4 of the other roller group and fixedly connected. In this embodiment, the rotating roller 4 is connected to the center of the front and rear ends of the bottom plate 2 by bolts 19 through the support 14, and a pull wire 13 is used to connect the cross bar 11 and the two rotating rollers 4, that is, the two ends of the pull wire 13 are fixedly connected to the two rotating rollers 4 and wrapped several times, and the cross bar 11 is tied to the middle of the pull wire 13. Figure 3The support 14 is a π-shaped stainless steel connecting rod, including a rolling connecting rod 17 and two groups of triangular side supports. The triangular side supports are welded together by two inclined rods and a connecting plate 18. The rolling connecting rod 17 is welded to the vertices of the two groups of side supports. The center of the rotating roller 4 passes through the rolling connecting rod 17 and can rotate along the rolling connecting rod 17. The inner diameter of the roller 4 is a stainless steel sewing spool of 6 mm, with protruding webs on both sides, and the rocker 3 is fixed to the webs.

[0030] The depth measurement component includes a laser displacement sensor 12, a data collector 7 and a computer. There are several laser displacement sensors, which are installed at the fixing holes of the crossbar 11 through the mounting holes on the sensor and the bolts 19. The laser port of the laser displacement sensor 12 faces the bottom plate 2 and is perpendicular to the bottom plate 2. The laser displacement sensor 12 is connected to the computer through the data collector 7, that is, the output end of the laser displacement sensor 12 is connected to the input end of the data collector 7, and the output end of the data collector 7 is connected to the input end of the processing end 8. In this embodiment, the laser displacement sensor 12 is a HG-C1050HG-C1100HG-C1200 ranging displacement sensor. The crossbar 11 is a solid stainless steel rod with a diameter of 5 mm. The rod is aligned with the center of the circular hole of the transparent porous plate, and has a groove with a width of 1 mm and a depth of 1 mm, which is convenient for the fixed-point connection of the laser positioning sensor.

[0031] The bottom plate 2 is also provided with a plurality of blind holes 5, which are arranged along the length axis of the cross bar 11, and are used for reference calibration of the laser displacement sensor 12. In this embodiment, the blind holes 5 are round holes and are located on the left side of the bottom plate 2. The plurality of blind holes 5 have the same aperture, the same hole spacing, and a depth of 3 mm.

[0032] The utility model discloses a device for detecting the roughness of the joint surface of an assembled prefabricated concrete component. The implementation steps are as follows:

[0033] S1, place the bottom plate 2 on the rough surface of the concrete component in the test area, and apply lubricating oil on the track 6 of the side plate 1 and the central axis of the roller 4;

[0034] S2, according to the size of the measuring area and the determined hole spacing of the measuring holes, the laser displacement sensor 12 is adjusted to the groove on the crossbar 11 corresponding to the measuring hole;

[0035] S3, use the rocker 3 to drive the rotating roller 4 to rotate, the pull wire 13 is wound around the rotating roller 4, and the cross bar 11 is moved to the blind hole 5 at the end of the bottom plate 2, and the displacement sensor angle is manually adjusted to align the laser with the center of the hole, and the data collector 7 and the computer are turned on to set the sensor reference value;

[0036] S4, shake the rocker 3, the gear-driven roller 4 rotates and drives the pull wire 13 to pull the crossbar 11 to move on the track 6. When the crossbar 11 reaches the groove of the track 6 corresponding to the measuring point, the corresponding hole depth is measured, and the concave-convex depth is x_i, until all the measurement and control are completed;

[0037] S5, recording and saving data, the concave-convex depth data of different positions measured in each measuring area shall not be less than 16, and the data after removing the 3 maximum values ​​and the 3 minimum values ​​are the valid concave-convex depth data;

[0038] S6, the evaluation index of the roughness of the joint surface of prefabricated concrete components is calculated as follows:

[0039]

[0040]

[0041] μ---average concave-convex depth (mm), accurate to 0.1mm;

[0042] CV---coefficient of variation of concave-convex depth, accurate to 0.1mm;

[0043] x i ---Effective concave-convex depth measured in the measuring area (mm);

[0044] N---The total number of effective concave and convex depths measured in each measuring area of ​​the rough surface.

[0045] When the average value μ of the concave-convex depth and the coefficient of variation CV of the concave-convex depth meet the following conditions at the same time, the roughness of the joint surface of the precast concrete component can be evaluated as qualified:

[0046] For precast concrete composite floor slabs, precast concrete composite beams, and precast concrete composite wall panels:

[0047] μ≥4.0;

[0048] CV≤4.0

[0049] For precast concrete beam ends, precast concrete column ends, and precast concrete wall ends:

[0050] μ≥6.0

[0051] CV≤4.0.

[0052] The utility model has a simple and clear structure, realizes batch automatic detection of the roughness of the concrete bonding surface, effectively reduces manpower, and significantly improves the accuracy and efficiency of the test, thereby solving the problems of the roughness detection of the bonding surface of assembled concrete components requiring sequential single-point measurement, low test efficiency, and inconvenient inclined surface measurement.

[0053] The above is an embodiment of the present invention, and its application is not limited to the present invention. Any modification or replacement of the present technology made by those skilled in the art without departing from the principle and spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for detecting the roughness of the joint surface of an assembled precast concrete component, characterized in that: The invention comprises a base, a driving mechanism, a crossbar (11) and a depth measurement component. The base comprises a bottom plate (2) and two side plates (1). The bottom plate (2) is provided with a plurality of through holes (15). The bottom plate (2) is made of a transparent material. The side plates (1) are arranged at intervals on both sides of the bottom plate (2) relative to each other. The two ends of the crossbar (11) are slidably arranged on the two side plates (1), and the crossbar (11) is arranged horizontally. The driving end of the driving mechanism is connected to the crossbar (11) and drives the crossbar (11) to move along the longitudinal axis of the side plates (1). The depth measurement component comprises a laser displacement sensor (12), a data collector (7) and a processing end (8). The laser port of the laser displacement sensor (12) faces the bottom plate (2) and is perpendicular to the bottom plate (2). The laser displacement sensor (12) is fixed on the crossbar (11). The output end of the laser displacement sensor (12) is connected to the input end of the data collector (7). The output end of the data collector (7) is connected to the input end of the processing end (8).

2. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 1, characterized in that: A plurality of through holes (15) are arranged in a matrix on the bottom plate (2).

3. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 1, characterized in that: The driving mechanism comprises a pull wire (13) and two roller groups. The two roller groups are arranged on the bottom plate (2) and are respectively located on both sides of the cross bar (11). One end of the pull wire (13) is connected to one of the roller groups, and the other end is connected to the cross bar (11) and then connected to the other roller group.

4. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 3 is characterized in that: The roller group comprises a support (14) and a rotating roller (4), wherein the support (14) is fixed on a base plate (2), and the rotating roller (4) is rotatably arranged on the support (14); one end of a pull wire (13) is fixedly connected to the rotating roller (4), and the other end is connected to a cross bar (11) after being wound around the rotating roller (4) for several turns, and then the pull wire (13) is wound around and fixedly connected to a rotating roller (4) of another roller group.

5. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 4, characterized in that: A rocker (3) is also provided on the rotating roller (4).

6. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 1, characterized in that: The side plate (1) is provided with a track (6) along its longitudinal axis, and a rolling wheel (10) is provided at a position where the cross bar (11) contacts the side plate (1), and the rolling wheel (10) slides along the track (6).

7. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 1, characterized in that: A fixed-point groove is provided on the track (6), and the center of the fixed-point groove is aligned with the center of the through hole (15) on the bottom plate (2).

8. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 1, characterized in that: A plurality of laser displacement sensors (12) are provided.

9. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 8, characterized in that: A plurality of mounting holes are provided on the crossbar (11), and the laser displacement sensor (12) is connected to the crossbar (11) through the mounting holes; the center of the mounting hole is aligned with the center of the through hole (15) on the bottom plate (2).

10. The device for detecting the roughness of the joint surface of prefabricated concrete components according to claim 8, characterized in that: A plurality of blind holes (5) are also provided on the bottom plate (2), and the plurality of blind holes (5) are arranged along the length axis of the transverse plate. The blind holes (5) are used for reference calibration of the laser displacement sensor (12).

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