Road and bridge concrete defect nondestructive testing method

Abstract

The invention discloses a nondestructive detection method for road and bridge concrete defects, and belongs to the technical field of infrared detection. According to the road and bridge concrete defect nondestructive testing method, a work box is included, a detection box is further included, the detection box is arranged in the work box in a lifting mode, a mounting box is fixedly connected into the detection box, a connecting plate is slidably connected to the mounting box, a swing air injection mechanism is arranged on the connecting plate, and a heating mechanism is arranged in a preheating box; the preheating box is communicated with the swing injection mechanism through a connecting pipe, and the detection head is matched with the swing injection mechanism; on one hand, a detector can be used for infrared detection of bubbles or cracks on the surface of concrete, and on the other hand, detection plasticine in the template box can be pressed onto the surface of the concrete, so that the plasticine can be pressed into the bubbles or the cracks when making contact with the cracks or the bubbles on the surface of the concrete; protrusions identical to the bubbles and the cracks are pressed out, so that the depths of the bubbles and the cracks can be observed conveniently, and the precision of follow-up visual detection is improved.

Description

Technical Field

[0001] The invention relates to the field of infrared detection technology, and in particular to a nondestructive detection method for road and bridge concrete defects. Background Art

[0002] With the rapid growth of the national economy, public construction has also been showing a rapid growth trend. In public construction, the transportation industry has been vigorously developed, which requires the construction of a large number of roads and bridges.

[0003] The construction of highway bridges usually requires a large amount of concrete. Concrete cracking and bubbles on the concrete surface are common problems that occur in concrete structures and have a serious impact on the bearing capacity and durability of concrete. By regularly testing whether the concrete is cracked and the width and depth of the cracks, the health of the concrete can be analyzed and appropriate maintenance measures can be taken in a timely manner to avoid concrete damage.

[0004] In the prior art, when detecting bubbles or cracks on concrete on roads and bridges, cameras are usually used for shooting. However, only the outlines of the bubbles or cracks can be seen in the shots, and the depth cannot be viewed and detected, which reduces the detection accuracy. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that only the outline of bubbles or cracks can be seen, but the depth cannot be viewed and detected, thereby reducing the detection accuracy, and to propose a non-destructive detection method for road and bridge concrete defects.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A method for nondestructive detection of road and bridge concrete defects comprises a working box, and further comprises: a detection box, which is lifted and arranged in the working box, wherein a mounting box is fixedly connected in the detection box, a connecting plate is slidably connected on the mounting box, a swing jet mechanism is arranged on the connecting plate, and the jet end of the swing jet mechanism faces the opening end of the detection box; a detection head, which is fixedly connected to the middle part of the connecting plate, wherein a preheating box is arranged on the top of the detection box, a heating mechanism is arranged in the preheating box, the preheating box is connected with the swing jet mechanism through a connecting pipe, and the detection head cooperates with the swing jet mechanism; a template box, which is lifted and arranged at the bottom of the connecting plate, wherein the template box has a cavity inside and an opening, a shape pressing mechanism is arranged in the template box cavity, and the pressing end of the shape pressing mechanism faces the opening end of the template box; a mounting plate, which is fixedly connected to the outer wall of the working box, wherein a moving wheel is arranged on the mounting plate, and a locking mechanism is arranged on the mounting plate, and when the pressing end of the shape pressing mechanism presses toward the ground, the moving wheel is locked by the locking mechanism.

[0007] In order to facilitate the swinging of the nozzle, preferably, the swinging jet mechanism includes a nozzle, an extension plate is fixedly connected to the connecting plate, a connecting shaft is rotatably connected to the extension plate, an air supply cylinder is fixedly connected to the connecting shaft, the nozzle is fixedly connected to the air supply cylinder, and the nozzle is connected to the air supply cylinder, a three-way valve is provided on the connecting pipe, and the three-way valve is connected to the air supply cylinder through a first pipe.

[0008] In order to facilitate intermittent rotation of the connecting shaft, further, a limit plate is fixedly connected to the connecting plate, a slider is slidably connected to the limit plate, a transmission gear is fixedly connected to the end of the connecting shaft away from the air supply cylinder, a rack is fixedly connected to the slider, and the rack is meshed with the transmission gear.

[0009] In order to facilitate the reciprocating movement of the slider, further, a connecting tooth block is fixedly connected to the inner wall of the detection box, a rotating shaft is rotatably connected to the connecting plate, a connecting gear is fixedly connected to the top of the rotating shaft, the connecting gear is meshed with the connecting tooth block, a first crank is rotatably connected to the bottom of the rotating shaft, a second crank is rotatably connected to the first crank, and the end of the second crank is rotatably connected to the slider.

[0010] In order to facilitate the air supply to the nozzle, preferably, a negative pressure pump is provided on the detection box, and the output end of the negative pressure pump is connected to the preheating box through a pipeline.

[0011] In order to facilitate the provision of hot air into the nozzle, preferably, the heating mechanism comprises a resistance wire, the resistance wire is fixedly connected in the preheating box, and a temperature sensor is arranged in the preheating box.

[0012] In order to facilitate the intuitive detection of the depth of bubbles or cracks on the concrete, preferably, the shape pressing mechanism includes a pressing plate, a pressing cylinder is fixedly connected to the top of the template box, a pressing rod is slidably connected to the pressing cylinder, a piston is provided at one end of the pressing rod, and the piston is in contact with the inner wall of the pressing cylinder, and the pressing plate is fixedly connected to the other end of the pressing rod, and the pressing plate is in contact with the inner wall of the template box.

[0013] In order to facilitate the pushing out of the detection clay in the template box, further, a guide cylinder is fixedly connected to the connecting plate, a guide rod is slidably connected to the guide cylinder, a sealing plug is provided at one end of the guide rod, the sealing plug is fitted with the inner wall of the guide cylinder, the template box is fixedly connected to the other end of the guide rod, and the sealing plug is separated into an upper cavity and a lower cavity, a limit spring is provided in the upper cavity, the two ends of the limit spring are fixedly connected to the sealing plug and the guide cylinder respectively, the upper cavity is connected to the three-way valve through a second pipe, and the lower cavity is connected to the cavity below the piston in the pressing cylinder through a pipe.

[0014] In order to facilitate the reciprocating displacement of the connecting plate, preferably, a screw rod is rotatably connected in the installation box, a movable block is threadedly connected to the screw rod, and the movable block is in contact with the inner wall of the installation box, the connecting plate is fixedly connected to the bottom of the movable block, a booster plate is fixedly connected to the inner wall of the detection box, the screw rod extends to the booster plate and is fixedly connected to a turbine plate, the air inlet end of the booster plate is fixedly connected to the first pipe, and the air outlet end of the booster plate is connected to the air supply cylinder through a pipe.

[0015] In order to lock and limit the moving wheel, preferably, the locking mechanism includes a locking rod, a locking cylinder is fixedly connected to the inner wall of the detection box, the locking rod is slidably connected to the locking cylinder, and a piston is provided at one end of the locking rod, and the piston is in contact with the inner wall of the locking cylinder, and a friction gasket is provided at the other end of the locking rod, and the friction end of the friction gasket faces the moving wheel, and a return spring is provided in the locking cylinder, and the two ends of the return spring are respectively fixedly connected to the piston and the locking cylinder, and the locking cylinder is connected to the upper cavity of the piston in the pressing cylinder through a pipeline.

[0016] Compared with the prior art, the present invention provides a nondestructive detection method for road and bridge concrete defects, which has the following beneficial effects: 1. This nondestructive testing method for road and bridge concrete defects can sweep away dust and impurities on the concrete surface through a swinging nozzle, which can ensure that the detection head captures the temperature changes on the concrete surface and prevent impurities and dust from affecting the measurement accuracy of the detection head, because they may block or interfere with the propagation of infrared radiation, resulting in false positive or false negative results in thermal imaging images, thereby affecting the judgment of cracks and bubbles. Removing dust and impurities can reduce errors and improve the reliability of results, so that the temperature change area can be more easily identified, thereby more accurately locating potential cracks or bubbles; 2. The nondestructive detection method for road and bridge concrete defects heats the gas transported in the preheating box and can cooperate with the reciprocating nozzle to blow the surface of the concrete. On the one hand, the concrete at different positions in the area can be blown evenly, and on the other hand, dust and impurities can be blown away. The concrete will heat up during the blowing process, which can make the temperature distribution inside the concrete more uniform, reduce the detection error caused by temperature difference, and make the detection head work more efficiently. 3. This nondestructive testing method for road and bridge concrete defects can drive the motor to rotate counterclockwise when the temperature of the concrete surface is relatively high, so that the detection box can be lowered to the concrete floor. On the one hand, the detection box can be used to insulate the heat of the concrete within the detection range to reduce the heat dissipation rate. On the other hand, it can also prevent external dust and impurities from entering the detection box and affecting the detection accuracy of the detection head. 4. The nondestructive detection method for road and bridge concrete defects can press the detection plasticine in the template box onto the surface of the concrete through a shape pressing mechanism, so that the plasticine can be pressed into the bubbles or cracks when it contacts the cracks or bubbles on the concrete surface, and press out bulges identical to the bubbles and cracks, so as to observe the depths of the bubbles and cracks. The heat on the detected concrete surface can quickly shape the plasticine that penetrates into the bubbles or cracks to prevent deformation, thereby improving the accuracy of subsequent visual detection. The swinging nozzle can blow dust or impurities in the bubbles or cracks to the outside to prevent affecting the molding state of the plasticine and improve the subsequent molding effect of the plasticine.

[0017] 5. The nondestructive detection method for road and bridge concrete defects performs stable limiting by moving the position of the wheels, which can prevent the working box from shaking on the one hand, and improve the pressing effect of the plasticine in the template box on the other hand.

[0018] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. On the one hand, the present invention can use a detector to perform infrared detection on the bubbles or cracks on the concrete surface. On the other hand, the detection plasticine in the template box can be pressed onto the surface of the concrete, so that when the plasticine contacts the cracks or bubbles on the concrete surface, it can be pressed into the bubbles or cracks, and protrusions identical to the bubbles and cracks are pressed out, so as to observe the depth of the bubbles and cracks. In addition, the heat on the detected concrete surface can quickly shape the plasticine that penetrates into the bubbles or cracks, prevent deformation, and improve the accuracy of subsequent visual detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A structural schematic diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention from a first perspective; Figure 2 A structural schematic diagram of a second perspective of a nondestructive detection method for road and bridge concrete defects proposed by the present invention; Figure 3 A schematic diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention Figure 1 ; Figure 4 A schematic diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention Figure 2 ; Figure 5 A schematic diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention Figure 3 ; Figure 6 A partial structural diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention Figure 1 ; Figure 7 A partial structural diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention Figure 2 ; Figure 8 A partial structural diagram of a nondestructive detection method for road and bridge concrete defects proposed by the present invention Figure 3 .

[0020] In the figure: 1, working box; 2, detection box; 3, preheating box; 4, resistance wire; 5, negative pressure pump; 6, mounting plate; 7, moving wheel; 8, mounting box; 9, screw rod; 10, booster plate; 11, turbine blade; 12, light belt; 13, movable block; 14, connecting plate; 15, detection head; 16, extension plate; 17, connecting shaft; 18, air supply cylinder; 19, nozzle; 20, transmission gear; 21, rack; 22, connecting gear; 23, The first crank; 24, the second crank; 25, the slider; 26, the limit plate; 27, the connecting gear block; 28, the expansion plate; 29, the sealing gasket; 30, the connecting pipe; 31, the three-way valve; 32, the guide cylinder; 33, the guide rod; 34, the sealing plug; 35, the limit spring; 36, the template box; 37, the pressing cylinder; 38, the pressing rod; 39, the pressing plate; 40, the locking cylinder; 41, the locking rod; 42, the friction gasket; 43, the return spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0023] Reference Figure 1-Figure 8A nondestructive detection method for road and bridge concrete defects includes a working box 1, and also includes: a detection box 2, which is lifted and arranged in the working box 1, wherein a mounting box 8 is fixedly connected in the detection box 2, and a connecting plate 14 is slidably connected to the mounting box 8, and a swing jet mechanism is arranged on the connecting plate 14, and the jet end of the swing jet mechanism faces the opening end of the detection box 2; a detection head 15, which is fixedly connected to the middle of the connecting plate 14, wherein a preheating box 3 is arranged on the top of the detection box 2, and a heating mechanism is arranged in the preheating box 3, and the preheating box 3 is connected to the swing jet mechanism through a connecting pipe 30. The injection mechanism is connected, and the detection head 15 cooperates with the swing injection mechanism; the template box 36 is lifted and lowered at the bottom of the connecting plate 14, wherein the interior of the template box 36 is a cavity and is provided with an opening, and a shape pressing mechanism is provided in the cavity of the template box 36, and the pressing end of the shape pressing mechanism is facing the opening end of the template box 36; the mounting plate 6 is fixedly connected to the outer wall of the working box 1, wherein a moving wheel 7 is provided on the mounting plate 6, and a locking mechanism is provided on the mounting plate 6, and when the pressing end of the shape pressing mechanism is pressed toward the ground, the moving wheel 7 is locked by the locking mechanism.

[0024] The maintenance of roads and bridges requires regular inspection of concrete to understand the width and depth of concrete cracks, analyze the health of the concrete and take appropriate maintenance measures in a timely manner to avoid damage to the concrete and improve the safety of roads and bridges.

[0025] The moving wheel 7 can drive the working box 1 to move on the concrete surface of the road bridge, and the detection box 2 is lifted and lowered in the working box 1. Figure 3 As shown in the figure, an independent reciprocating wire connecting rod is rotatably connected to the inner wall of the working box 1, and a motor is provided. The independent reciprocating wire connecting rod is driven to rotate by the motor. A lifting block is also threadedly connected to the independent reciprocating wire connecting rod, and the detection box 2 is fixedly connected to the lifting block. When the motor rotates counterclockwise, the independent reciprocating wire connecting rod can drive the detection box 2 to descend, and when the motor rotates clockwise, the independent reciprocating wire connecting rod can drive the detection box 2 to rise, thereby changing and adjusting the position and height of the detection box 2.

[0026] In addition, a light strip 12 is provided inside the detection box 2 to enhance the brightness of the light source inside the detection box 2. An expansion plate 28 is provided on the outer wall of the detection box 2. A sealing gasket 29 is provided inside the expansion plate 28. When the bottom of the detection box 2 is against the concrete surface, the sealing gasket 29 can isolate the outside air and reduce the amount of dust entering the detection box 2.

[0027] When the staff has determined the concrete surface of the road bridge to be tested, the working box 1 can be moved into the range by the moving wheels 7, and then the plasticine is stuffed into the cavity of the template box 36, and the plasticine needs to protrude to the outside of the template box 36. At this time, the detection box 2 is started to descend from the working box 1 to the middle position, which can be referred to Figure 1As shown in the figure, the switch of the swing jet mechanism is started, and the jet end of the swing jet mechanism will detect the swing jet toward the concrete surface to blow away the dust and impurities on the concrete surface, and the detection head 15 is an infrared imager.

[0028] By swinging the jet mechanism to blow away dust and impurities on the concrete surface, it is possible to ensure that the detection head 15 captures temperature changes on the concrete surface and prevent impurities and dust from affecting the measurement accuracy of the detection head 15, as they may block or interfere with the propagation of infrared radiation, resulting in false positive or false negative results in the thermal imaging image, thereby affecting the judgment of cracks and bubbles. Removing dust and impurities can reduce errors and improve the reliability of the results, which can make it easier to identify areas of temperature change, thereby more accurately locating potential cracks or bubbles.

[0029] Furthermore, the above-mentioned swing jet mechanism includes a nozzle 19, an extension plate 16 is fixedly connected to the connecting plate 14, a connecting shaft 17 is rotatably connected to the extension plate 16, an air supply cylinder 18 is fixedly connected to the connecting shaft 17, the nozzle 19 is fixedly connected to the air supply cylinder 18, and the nozzle 19 is communicated with the air supply cylinder 18, a three-way valve 31 is provided on the connecting pipe 30, and the three-way valve 31 is communicated with the air supply cylinder 18 through a first pipeline.

[0030] The gas in the preheating box 3 can be transported through the three-way valve 31, and a first pipeline and a second pipeline are arranged on the three-way valve 31, and the passage of the three-way valve 31 can be adjusted and changed as needed.

[0031] A negative pressure pump 5 is provided on the detection box 2 , and an output end of the negative pressure pump 5 is connected to the preheating box 3 through a pipeline. When the negative pressure pump 5 is started, pressurized gas is delivered into the preheating box 3 .

[0032] The heating mechanism includes a resistance wire 4 which is fixedly connected in the preheating box 3 , and a temperature sensor is arranged in the preheating box 3 .

[0033] The resistance wire 4 can heat the pressurized gas, and the temperature sensor can monitor the temperature in the preheating box 3 in real time to prevent overheating.

[0034] Before the detection head 15 is detected, the switch of the resistance wire 4 can be started to heat the conveying gas in the preheating box 3, and then the passage switch of the three-way valve 31 can be controlled to convey the high-temperature gas to the first channel, and then the gas is conveyed to the gas supply cylinder 18 by the first channel, and the gas supply cylinder 18 will divert the gas and convey it to the nozzle 19. During this process, the nozzle 19 swings back and forth and moves back and forth left and right in the detection box 2.

[0035] By heating the gas transported in the preheating box 3, the surface of the concrete can be purged in conjunction with the reciprocating nozzle 19. On the one hand, the concrete at different positions in the area can be evenly purged, and on the other hand, dust and impurities can be purged and cleaned. In addition, the concrete will be heated during the purging process, which can make the temperature distribution inside the concrete more uniform, reduce the detection error caused by temperature difference, and make the detection head 15 work more efficiently.

[0036] When the temperature of the concrete surface is relatively high, the motor can be driven to rotate counterclockwise so that the detection box 2 can be lowered and pressed against the concrete floor. On the one hand, the detection box 2 can be used to insulate the heat of the concrete within the detection range and reduce the heat dissipation rate. On the other hand, it can also prevent external dust and impurities from entering the detection box 2 and affecting the detection accuracy of the detection head 15.

[0037] The connecting plate 14 is fixedly connected to a limit plate 26 , the limit plate 26 is slidably connected to a slider 25 , the end of the connecting shaft 17 away from the air supply cylinder 18 is fixedly connected to a transmission gear 20 , the slider 25 is fixedly connected to a rack 21 , and the rack 21 meshes with the transmission gear 20 .

[0038] A connecting tooth block 27 is fixedly connected to the inner wall of the detection box 2, a rotating shaft is rotatably connected to the connecting plate 14, a connecting gear 22 is fixedly connected to the top of the rotating shaft, the connecting gear 22 is meshed with the connecting tooth block 27, a first crank 23 is rotatably connected to the bottom of the rotating shaft, a second crank 24 is rotatably connected to the first crank 23, and an end of the second crank 24 is rotatably connected to the slider 25.

[0039] When the connecting plate 14 moves back and forth in the detection box 2, the connecting gear 22 will be limited by the connecting tooth block 27 and rotate. At this time, the first crank 23 and the second crank 24 cooperate to make the slider 25 move back and forth between the two sets of limiting plates 26, while driving the rack 21 to move, and then the transmission gear 20 drives the connecting shaft 17 to rotate back and forth, so that it can rotate counterclockwise or clockwise at intervals, and then drive the air supply cylinder 18 to rotate synchronously, so that the nozzle 19 on the air supply cylinder 18 swings back and forth.

[0040] When the detection head 15 completes the detection and records the image, the shape pressing mechanism can be used to press the detection clay in the template box 36 onto the surface of the concrete, so that the clay can be pressed into the bubbles or cracks when it contacts the cracks or bubbles on the concrete surface, and press out protrusions that are the same as the bubbles and cracks, so as to observe the depth of the bubbles and cracks. The heat on the detected concrete surface can quickly shape the clay that penetrates into the bubbles or cracks to prevent deformation and improve the accuracy of subsequent intuitive detection. The swinging nozzle 19 can blow dust or impurities in the bubbles or cracks to the outside to prevent affecting the molding state of the clay and improve the subsequent molding effect of the clay.

[0041] Furthermore, the above-mentioned shape pressing mechanism includes a pressing plate 39, a pressing cylinder 37 is fixedly connected to the top of the template box 36, a pressing rod 38 is slidably connected to the pressing cylinder 37, a piston is provided at one end of the pressing rod 38, and the piston is fitted with the inner wall of the pressing cylinder 37, and the pressing plate 39 is fixedly connected to the other end of the pressing rod 38, and the pressing plate 39 is fitted with the inner wall of the template box 36.

[0042] The pressing rod 38 can drive the pressing plate 39 to move along the inner wall of the template box 36 so as to press the plasticine, so that the plasticine can more accurately reflect the depth of the bubbles or cracks.

[0043] A guide cylinder 32 is fixedly connected to the connecting plate 14, and a guide rod 33 is slidably connected to the guide cylinder 32. A sealing plug 34 is provided at one end of the guide rod 33, and the sealing plug 34 fits against the inner wall of the guide cylinder 32. A template box 36 is fixedly connected to the other end of the guide rod 33, and the sealing plug 34 is separated into an upper cavity and a lower cavity. A limiting spring 35 is provided in the upper cavity, and both ends of the limiting spring 35 are fixedly connected to the sealing plug 34 and the guide cylinder 32 respectively. The upper cavity is connected to the three-way valve 31 through a second pipeline, and the lower cavity is connected to the cavity below the piston in the pressing cylinder 37 through a pipeline.

[0044] By controlling the passage of the three-way valve 31, a pressure relief valve is provided on the three-way valve 31. When the delivered pressure exceeds the set value, the pressure relief valve will automatically open to release the excess pressure, and then close the switch of the resistance wire 4, so that the gas in the preheating box 3 is delivered to the upper cavity in the guide cylinder 32 through the second pipeline. During this process, the sealing plug 34 will drive the guide rod 33 to move downward, the limit spring 35 is stretched, and the downward-moving guide rod 33 will drive the template box 36 to move synchronously. At this time, the gas in the lower cavity will be delivered to the lower cavity of the piston in the pressing cylinder 37 through the pipeline, so that the pressing rod 38 drives the pressing plate 39 to move in the opposite direction of the opening end of the template box 36.

[0045] During this process, the locking mechanism locks the moving wheel 7 to a limited position, and the above-mentioned locking mechanism includes a locking rod 41, a locking cylinder 40 is fixedly connected to the inner wall of the detection box 2, the locking rod 41 is slidably connected to the locking cylinder 40, and a piston is provided at one end of the locking rod 41, and the piston fits against the inner wall of the locking cylinder 40, and a friction gasket 42 is provided at the other end of the locking rod 41, and the friction end of the friction gasket 42 faces the moving wheel 7, and a return spring 43 is provided in the locking cylinder 40, and the two ends of the return spring 43 are respectively fixedly connected to the piston and the locking cylinder 40, and the locking cylinder 40 is connected to the upper cavity of the piston in the pressing cylinder 37 through a pipeline.

[0046] When the gas in the lower cavity is transported to the lower cavity of the piston in the pressing cylinder 37 through the pipeline, the upper cavity of the piston in the pressing cylinder 37 will transport the gas to the locking cylinder 40, and the piston on the locking rod 41 will be pushed, and the return spring 43 will be stretched, and the friction pad 42 on the locking rod 41 will be pushed to one side of the moving wheel 7 and resist the outer wall of the moving wheel 7 to limit it.

[0047] By stably limiting the position of the moving wheel 7, on the one hand, the working box 1 can be prevented from shaking, and on the other hand, the pressing effect of the plasticine in the template box 36 can be improved.

[0048] In order to drive the connecting plate 14 to move back and forth in the detection box 2, a screw rod 9 is rotatably connected in the installation box 8, and a movable block 13 is threadedly connected to the screw rod 9, and the movable block 13 fits against the inner wall of the installation box 8. The connecting plate 14 is fixedly connected to the bottom of the movable block 13, and a booster disk 10 is fixedly connected to the inner wall of the detection box 2. The screw rod 9 extends to the booster disk 10 and is fixedly connected to a turbine blade 11. The air inlet end of the booster disk 10 is fixedly connected to the first pipe, and the air outlet end of the booster disk 10 is connected to the air supply cylinder 18 through a pipe.

[0049] When the first pipeline is ventilated, the gas will pass through the booster disc 10 and then be transported to the gas supply cylinder 18. During this process, the screw rod 9 will be driven to rotate continuously.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for nondestructive detection of road and bridge concrete defects, comprising a working box (1), characterized in that: Also includes: The detection box (2) is arranged in a lifting manner in the working box (1). The detection box (2) is fixedly connected to a mounting box (8), the mounting box (8) is slidably connected to a connecting plate (14), a swinging jet mechanism is provided on the connecting plate (14), and the jet end of the swinging jet mechanism faces the opening end of the detection box (2); The detection head (15) is fixedly connected to the middle of the connecting plate (14). Wherein, a preheating box (3) is arranged on the top of the detection box (2), a heating mechanism is arranged inside the preheating box (3), the preheating box (3) is connected to the swinging spraying mechanism through a connecting pipe (30), and the detection head (15) cooperates with the swinging spraying mechanism; The template box (36) is arranged at the bottom of the connecting plate (14) in a lifting manner. The interior of the template box (36) is a cavity and is provided with an opening, a shape pressing mechanism is provided in the cavity of the template box (36), and a pressing end of the shape pressing mechanism faces the opening end of the template box (36); The mounting plate (6) is fixedly connected to the outer wall of the working box (1). Wherein, a moving wheel (7) is arranged on the mounting plate (6), and a locking mechanism is arranged on the mounting plate (6); when the pressing end of the shape pressing mechanism is pressed toward the ground, the moving wheel (7) is locked by the locking mechanism.

2. A nondestructive detection method for road and bridge concrete defects according to claim 1, characterized in that: The swing jet mechanism comprises a nozzle (19), an extension plate (16) fixedly connected to the connection plate (14), a connection shaft (17) rotatably connected to the extension plate (16), an air supply cylinder (18) fixedly connected to the connection shaft (17), the nozzle (19) fixedly connected to the air supply cylinder (18), the nozzle (19) being connected to the air supply cylinder (18), and the nozzle (19) being connected to the air supply cylinder (18), and a three-way valve (31) being provided on the connection pipe (30), and the three-way valve (31) being connected to the air supply cylinder (18) via a first pipeline.

3. A nondestructive detection method for road and bridge concrete defects according to claim 2, characterized in that: The connection plate (14) is fixedly connected to a limit plate (26), the limit plate (26) is slidably connected to a slider (25), one end of the connection shaft (17) away from the air supply cylinder (18) is fixedly connected to a transmission gear (20), the slider (25) is fixedly connected to a rack (21), and the rack (21) is meshed with the transmission gear (20).

4. A nondestructive detection method for road and bridge concrete defects according to claim 3, characterized in that: A connecting tooth block (27) is fixedly connected to the inner wall of the detection box (2); a rotating shaft is rotatably connected to the connecting plate (14); a connecting gear (22) is fixedly connected to the top of the rotating shaft; the connecting gear (22) is meshed with the connecting tooth block (27); a first crank (23) is rotatably connected to the bottom of the rotating shaft; a second crank (24) is rotatably connected to the first crank (23); and an end of the second crank (24) is rotatably connected to a slider (25).

5. A nondestructive detection method for road and bridge concrete defects according to claim 1, characterized in that: The detection box (2) is provided with a negative pressure pump (5), and the output end of the negative pressure pump (5) is connected to the preheating box (3) through a pipeline.

6. A nondestructive detection method for road and bridge concrete defects according to claim 5, characterized in that: The heating mechanism comprises a resistance wire (4), the resistance wire (4) is fixedly connected in the preheating box (3), and a temperature sensor is arranged in the preheating box (3).

7. A nondestructive detection method for road and bridge concrete defects according to claim 2, characterized in that: The shape pressing mechanism comprises a pressing plate (39), a pressing cylinder (37) is fixedly connected to the top of the template box (36), a pressing rod (38) is slidably connected to the pressing cylinder (37), a piston is provided at one end of the pressing rod (38), and the piston is in contact with the inner wall of the pressing cylinder (37), and the pressing plate (39) is fixedly connected to the other end of the pressing rod (38), and the pressing plate (39) is in contact with the inner wall of the template box (36).

8. A nondestructive detection method for road and bridge concrete defects according to claim 7, characterized in that: The connecting plate (14) is fixedly connected to a guide cylinder (32), and the guide cylinder (32) is slidably connected to a guide rod (33). A sealing plug (34) is provided at one end of the guide rod (33), and the sealing plug (34) is in contact with the inner wall of the guide cylinder (32). The template box (36) is fixedly connected to the other end of the guide rod (33), and the sealing plug (34) is separated into an upper cavity and a lower cavity. A limit spring (35) is provided in the upper cavity, and the two ends of the limit spring (35) are respectively fixedly connected to the sealing plug (34) and the guide cylinder (32). The upper cavity is connected to the three-way valve (31) through a second pipeline, and the lower cavity is connected to the cavity below the piston in the pressing cylinder (37) through a pipeline.

9. A nondestructive detection method for road and bridge concrete defects according to claim 8, characterized in that: A screw rod (9) is rotatably connected inside the installation box (8), a movable block (13) is threadedly connected to the screw rod (9), and the movable block (13) is in contact with the inner wall of the installation box (8), the connecting plate (14) is fixedly connected to the bottom of the movable block (13), a booster disc (10) is fixedly connected to the inner wall of the detection box (2), the screw rod (9) extends into the booster disc (10) and is fixedly connected to a turbine blade (11), an air inlet end of the booster disc (10) is fixedly connected to a first pipeline, and an air outlet end of the booster disc (10) is connected to an air supply cylinder (18) via a pipeline.

10. A nondestructive detection method for road and bridge concrete defects according to claim 1, characterized in that: The locking mechanism comprises a locking rod (41), a locking cylinder (40) fixedly connected to the inner wall of the detection box (2), the locking rod (41) being slidably connected to the locking cylinder (40), and a piston being arranged at one end of the locking rod (41), and the piston being in contact with the inner wall of the locking cylinder (40), and a friction pad (42) being arranged at the other end of the locking rod (41), and the friction end of the friction pad (42) facing the moving wheel (7), a return spring (43) being arranged in the locking cylinder (40), and the two ends of the return spring (43) being fixedly connected to the piston and the locking cylinder (40), respectively, and the locking cylinder (40) being connected to the upper cavity of the piston in the pressing cylinder (37) through a pipeline.

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