Device for Measuring the Compaction of Grouting in the Duct of Corrugated Pipe of Prefabricated Box Girder Based on Ultrasonic Measurement

Abstract

The present invention discloses a device for measuring the grouting compactness of corrugated pipe ducts in precast box girders based on ultrasonic waves, which comprises a support base. On both sides of the support base, a guide rod is fixedly connected respectively. Each guide rod is slidably connected with a sleeve. The outer end of each sleeve is fixedly connected with an inclined rod. The inclined rod is provided with ultrasonic detection radars at intervals. On both sides of the inclined rod, a plurality of support wheels are rotatably connected respectively; a traveling device is arranged on the support base. In the present invention, the distance between the two inclined rods can be adjusted, so that the support base can place the retracted inclined rods into the inner cavity of the precast box girder and travel through the traveling device. The ultrasonic detection radar is used to detect the grouting compactness of the corrugated pipe ducts from the inner cavity of the precast box girder. After the detection in the inner cavity of the precast box girder is completed, the two inclined rods move away from each other, and the traveling device lands on the ground. The two inclined rods are used for detection from the outside of the precast box girder, and ultrasonic detection can be carried out from both the inside and outside of the precast box girder, so as to achieve comprehensive detection.

Description

Technical Field

[0001] The invention relates to the technical field of prefabricated box beam parts detection, in particular to a device for measuring the compactness of grouting of corrugated pipe channels of prefabricated box beams based on ultrasonic waves. Background Art

[0002] With the rapid development of China's bridge construction, corrugated pipe prestressed concrete structures have been widely used. The quality of grouting in the corrugated pipe channels has always been a concern. In the current grouting construction of corrugated pipe channels, quality problems such as loose grouting, gaps, and channels not being completely filled with cement slurry often occur, resulting in frequent quality and safety accidents. Similar accidents have attracted strong attention from the engineering community.

[0003] The existing technology generally uses detection radar and electromagnetic wave radar to scan the position of the corrugated pipe buried in the box girder and detect the grouting density. The electromagnetic wave radar method does not have a device that can detect both the inside and outside of the box girder, or after scanning the inside of the box girder, it is necessary to readjust it more cumbersomely before the outside of the box girder can be inspected, resulting in a long detection cycle. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and to propose a device for measuring the grouting density of the corrugated pipe duct of a prefabricated box beam based on ultrasonic wave, thereby solving the problems existing in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The device for ultrasonically measuring the compactness of grouting of the corrugated pipe channel of a prefabricated box beam comprises a support seat, two sides of the support seat are respectively fixedly connected to a guide rod, each guide rod is slidably connected to a sleeve, the outer end of each sleeve is fixedly connected to an inclined rod, the inclined rods are spaced apart with ultrasonic detection radars, and two sides of the inclined rods are respectively rotatably connected to a plurality of support wheels;

[0007] A walking device is arranged on the supporting seat.

[0008] Preferably, the walking device includes a box body, one side of the box body is fixedly connected to a support plate, the box body is provided with a first plane and a second plane, the first plane and the second plane are respectively provided with driving wheels, the upper side of the support seat is provided with a guide groove, the opposite inner walls of the guide groove are respectively provided with sliding grooves, the support plate is rotatably connected to the support shaft, the support shaft slides in the guide groove, and the two ends of the support seat are respectively threadedly connected to limit rods, which lock the support plate parallel to the end of the support seat.

[0009] Preferably, the distance from the support plate to the first plane is smaller than the distance from the second plane.

[0010] Preferably, a cavity is provided inside the box body, a counterweight is provided inside the cavity, and a cabinet door is provided on one side of the box body away from the support plate.

[0011] Preferably, the guide rod is fixedly connected to the inner wall of the sleeve to support the spring.

[0012] Preferably, the inclined rod is fixedly connected to a plurality of support plates at intervals. Each support plate is rotatably connected to a circular shaft. The circular shaft is fixedly connected to a flat plate. The box body of the ultrasonic detection radar is fixedly connected to the flat plate. The flat plate is provided with through holes. Two threaded holes are symmetrically provided on the inclined rod. The through holes can be coaxially aligned with the threaded holes respectively and threadedly connected with locking bolts.

[0013] The advantages of the present invention are as follows: The device for measuring the grouting density of the corrugated pipe duct of the precast box girder based on ultrasonic waves provided by the present invention uses the support seat as a reference, so that the two sleeves slide on the guide rods on both sides of the support seat. The distance between the two inclined rods can be adjusted. The support seat can place the retracted inclined rods into the inner cavity of the precast box girder and walk through the walking device. The ultrasonic detection radar is used to detect the grouting density of the corrugated pipe duct from the inner cavity of the precast box girder. After the detection in the inner cavity of the precast box girder is completed, the two inclined rods move away from each other, and the walking device lands on the ground. The two inclined rods are detected from the outside of the precast box girder, and ultrasonic detection can be carried out from both the inside and outside of the precast box girder, that is, detected from both sides of the corrugated pipe duct, so as to detect comprehensively.

[0014] The present invention removes the block of the limit rod and cooperates with the sliding action of the support shaft and the guide groove, so that the box body is flipped from one end of the support seat to the other end. Subsequently, the limit rod is locked at this end, and the limit rod limits the support plate, so that the box body can be flipped. By directly flipping the box body, the inclined rod does not need to change direction and only needs to move back to detect the outside of the precast box girder. After adjusting the position during the internal detection, there is no need for debugging, so the work efficiency is improved during the internal and external detection processes. Description of the Drawings

[0015] Figure 1 is the schematic diagram of the basic structure of the present invention;

[0016] Figure 2 is the view from another perspective of the present invention;

[0017] Figure 3 is Figure 2 the partial enlarged view at E in

[0018] Figure 4 is the schematic diagram of the connection structure between the box body and the support seat of the present invention;

[0019] Figure 5 is the schematic diagram of the working state of the present invention. Detailed Embodiments

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] As Figures 1-5 shown, the device for measuring the compactness of the grouting in the corrugated pipe hole of the precast box girder based on ultrasonic waves provided by the present invention includes a support base 1. One guide rod 2 is fixedly connected to each side of the support base 1. A sleeve 3 is slidably connected to each guide rod 2. An inclined rod 4 is fixedly connected to the outer end of each sleeve 3. An ultrasonic detection radar 5 is provided at intervals on the inclined rod 4. A plurality of support wheels 6 are rotatably connected to both sides of the inclined rod 4;

[0022] A traveling device 7 is provided on the support base 1.

[0023] With the support base 1 of the present invention as a reference, the two sleeves 3 slide on the guide rods 2 on both sides of the support base 1. The distance between the two inclined rods 4 can be adjusted. The support base 1 can place the retracted inclined rods 4 into the inner cavity of the precast box girder 10 and travel through the traveling device 7. The compactness of the grouting in the corrugated pipe hole is detected by the ultrasonic detection radar 5 from the inner cavity of the precast box girder 10. After the detection in the inner cavity of the precast box girder 10 is completed, the two inclined rods 4 move away from each other, and the traveling device 7 lands on the ground. The two inclined rods 4 are detected from the outside of the precast box girder 10, and ultrasonic detection can be performed from both the inside and outside of the precast box girder 10, that is, detecting from both sides of the corrugated pipe hole, so as to detect comprehensively.

[0024] The traveling device 7 includes a box body 71. A support plate 72 is fixedly connected to one side of the box body 71. The box body 71 is provided with a first plane 73 and a second plane 74. Driving wheels 75 are respectively provided on the first plane 73 and the second plane 74. The driving wheels 75 are driven by separate driving motors. A guide groove 76 is provided on the upper side of the support base 1. Sliding grooves 77 are respectively provided on the opposite inner walls of the guide groove 76. The support plate 72 is rotatably connected to a support shaft 78. The support shaft 78 slides in the guide groove 76. Limiting rods 79 are respectively threadedly connected to both ends of the support base 1. The limiting rods 79 lock the support plate 72 in parallel at the end of the support base 1.

[0025] By removing the block of the limiting rod 79 and cooperating with the sliding action of the support shaft 78 and the guide groove 76, the box body 71 is flipped from one end of the support base 1 to the other end. Subsequently, the limiting rod 79 is locked at this end, and the limiting rod 79 limits the support plate 72, so that the box body 71 can be flipped. By directly flipping the box body 71, the inclined rod 4 does not need to change direction. It only needs to move back to detect the outside of the precast box girder 10. After the position is adjusted during the internal detection, no debugging is required, so as to improve the work efficiency during the internal and external detection processes.

[0026] The interior of the box body 71 is provided with a cavity, a counterweight is arranged in the cavity, and a cabinet door 711 is arranged on one side of the box body 71 away from the support plate 72.

[0027] The distance from the support plate 72 to the first plane 73 is less than the distance to the second plane 74; due to the height difference inside and outside the precast box girder 10, when the first plane 73 is at the bottom surface, the distance between the two inclined rods 4 is small, which is suitable for detection inside the precast box girder 10. When the box body 71 is flipped 180 degrees so that the second plane 74 faces downwards, in order to make up for the height difference when the box body 71 falls to the ground, the distance from the support plate 72 to the first plane 73 is designed to be less than the distance to the second plane 74. Before flipping the box body 71, remove the counterweight in the box body 71, flip the box body 71 and place it on a forklift or an existing lifting vehicle, then reinsert the counterweight, and then slowly lower the box body 71 to the ground. Due to the built-in counterweight in the box body 71, it can avoid tipping caused by the inclined rods 4 and improve stability.

[0028] In order to enable the box body 71 to move forward after landing, the precast box girder 10 is supported by a plurality of hydraulic jacks 30 on two parallel backing plates 20. When the inclined rod 4 moves to the corresponding hydraulic jack 30, the hydraulic jack 30 first retracts so that the inclined rod 4 can cross the support point of the hydraulic jack 30.

[0029] The guide rod 2 is fixedly connected to the inner wall of the sleeve 3 to support the spring 31, so that the support wheels 6 on the inner sides of the two inclined rods 4 press against the outside of the precast box girder 10, and the precast box girder 10 itself is used to guide the moving direction of the traveling device 7, which is fast and convenient.

[0030] The inclined rod 4 is fixedly connected with a plurality of support plates 51 at intervals. Each support plate 51 is rotatably connected to a round shaft 52. The round shaft 52 is fixedly connected to a flat plate 53. The box body of the ultrasonic detection radar 5 is fixedly connected to the flat plate 53. The flat plate 53 is provided with through holes. Two threaded holes 54 are symmetrically arranged on the inclined rod 4. The through holes can be coaxially aligned with the threaded holes 54 and threadedly connected with locking bolts respectively.

[0031] By flipping the detection surface of the ultrasonic detection radar 5, the ultrasonic detection of the inside and outside of the precast box girder 10 can be quickly adjusted. When it is necessary to change the ultrasonic detection radar 5 from one side of the inclined rod 4 to the other side, remove the corresponding locking bolt, then flip the ultrasonic detection radar 5, align the through hole of the flat plate 53 with the threaded hole 54 on the other side, and then threadedly connect the locking bolt, so as to change the orientation of the ultrasonic detection radar 5 and quickly adapt to the ultrasonic detection operation inside and outside the precast box girder 10, with high work efficiency.

[0032] Working principle: Taking the support base 1 as a reference, two sleeves 3 slide on the guide rods 2 on both sides of the support base 1. The distance between the two inclined rods 4 can be adjusted. The support base 1 can place the retracted inclined rods 4 into the inner cavity of the precast box girder 10 and move through the traveling device 7. The ultrasonic detection radar 5 is used to detect the compactness of the grouting in the corrugated pipe duct from the inner cavity of the precast box girder 10. After the detection in the inner cavity of the precast box girder 10 is completed, the counterweight in the box body 71 is removed, the box body 71 is turned over and placed on a forklift or an existing lifting vehicle. Subsequently, the counterweight is reinstalled, and then the box body 71 is slowly lowered to the ground. Then, the two inclined rods 4 are detected from the outside of the precast box girder 10, enabling ultrasonic detection from both the inside and outside of the precast box girder 10, that is, detecting from both sides of the corrugated pipe duct, so as to achieve comprehensive detection.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Device for measuring the grouting compactness of corrugated pipe ducts in precast box girders based on ultrasonic waves, comprising a support base (1), with a guide rod (2) fixedly connected to each side of the support base (1). A sleeve (3) is slidably connected to each guide rod (2), and an inclined rod (4) is fixedly connected to the outer end of each sleeve (3). The inclined rod (4) is provided with ultrasonic detection radars (5) at intervals, and a plurality of support wheels (6) are rotatably connected to both sides of the inclined rod (4). A traveling device (7) is provided on the support base (1). The traveling device (7) comprises a box body (71), with a support plate (72) fixedly connected to one side of the box body (71). The box body (71) is provided with a first plane (73) and a second plane (74), and driving wheels (75) are respectively provided on the first plane (73) and the second plane (74). A guide groove (76) is provided on the upper side of the support base (1), and sliding grooves (77) are respectively provided on the opposite inner walls of the guide groove (76). The support plate (72) is rotatably connected to a support shaft (78), and the support shaft (78) slides in the guide groove (76). Limit rods (79) are respectively threadedly connected to both ends of the support base (1), and the limit rods (79) lock the support plate (72) parallel to the end of the support base (1).

2. The device for measuring the compactness of grouting in the corrugated pipe of precast box girders based on ultrasonic according to claim 1, wherein: The distance from the support plate (72) to the first plane (73) is less than the distance to the second plane (74).

3. The device for measuring the compactness of grouting in the corrugated pipe of precast box girders based on ultrasonic measurement according to claim 1, wherein: A cavity is provided inside the box body (71), and a counterweight is provided in the cavity. A cabinet door (711) is provided on the side of the box body (71) away from the support plate (72).

4. The device for measuring the grouting compactness of the corrugated pipe duct of precast box girders based on ultrasonic measurement according to claim 1, wherein: A support spring (31) is fixedly connected to the inner wall of the guide rod (2) and the sleeve (3).

5. The device for measuring the compactness of the grouting in the corrugated pipe of the precast box girder based on ultrasonic measurement according to any one of claims 1 to 4, characterized in that: A plurality of support plates (51) are fixedly connected to the inclined rod (4) at intervals. A circular shaft (52) is rotatably connected to each support plate (51), and a flat plate (53) is fixedly connected to the circular shaft (52). The box body of the ultrasonic detection radar (5) is fixedly connected to the flat plate (53). The flat plate (53) is provided with through holes, and two threaded holes (54) are symmetrically provided on the inclined rod (4). The through holes can respectively be coaxially aligned with the threaded holes (54) and threadedly connected with locking bolts.

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