Concrete pavement layer thickness detection device applied to bridge engineering

Abstract

The invention discloses a concrete pavement layer thickness detection device applied to bridge engineering, and relates to the technical field of bridge construction. The device comprises a transfer plate trailer, a plurality of vertically-arranged self-locking telescopic rods are fixedly mounted at the top of the transfer plate trailer, supporting frames are fixedly mounted at the telescopic ends of the self-locking telescopic rods, horizontal sliding rods are slidably mounted on the supporting frames, and mounting frames are fixedly mounted at the ends, away from the transfer plate trailer, of the horizontal sliding rods; and the bottoms of the plurality of mounting racks are provided with a same pavement layer thickness measuring assembly. By arranging the pavement layer thickness measuring assembly, the lifting motor drives the bottom end of the measuring pipe to make contact with the bridge deck slab, the thickness of the pavement layer at the current point position can be measured according to the scale marks at the bottom end of the measuring pipe, and meanwhile concrete inside and outside the measuring pipe is flush; constructors can observe the heights of the concrete layers on the inner side and the outer side of the measuring pipe at the same time, and then the thickness of the pavement layer at the current point position can be obtained more visually and conveniently.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to a device for detecting the thickness of a concrete paving layer applied to bridge engineering. Background Art

[0002] The bridge deck paving refers to the protective layer paved on the bridge deck, which is used to prevent the wheel from directly wearing the bridge deck, disperse the wheel load, and also provide a flat and anti-slip driving surface for vehicles. Increasing the thickness of the bridge deck paving generally cannot enhance the overall stiffness of the bridge structure, but increases the dead load of the bridge. Especially for long-span bridges, the weight of the bridge deck paving may have a greater impact on the economy of the bridge. Therefore, the thickness of the bridge deck paving needs to be accurately controlled.

[0003] At present, in bridge engineering, a plumb bob is commonly used to set up a vertical scale rod in the freshly paved concrete paving layer, and then measure the thickness of the paving layer. However, the freshly paved concrete paving layer has a certain fluidity, resulting in different thicknesses at different places of the paving layer. The scale rod can only measure the thickness data of a single point, but cannot reflect the uniformity of the concrete thickness around the measurement point. Therefore, a large number of repeated and multi-point measurements are required to more accurately measure the approximate thickness of each area of the paving layer. For this reason, a device for detecting the thickness of a concrete paving layer applied to bridge engineering is proposed. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the freshly paved concrete paving layer has a certain fluidity, resulting in different thicknesses at different places of the paving layer. The scale rod can only measure the thickness data of a single point, but cannot reflect the uniformity of the concrete thickness around the measurement point. Therefore, a large number of repeated and multi-point measurements are required to more accurately measure the approximate thickness of each area of the paving layer. The present invention provides a device for detecting the thickness of a concrete paving layer applied to bridge engineering.

[0005] The present invention specifically adopts the following technical solutions to achieve the above purpose: A device for detecting the thickness of a concrete paving layer applied to bridge engineering, including a transfer flatbed truck. A plurality of vertically arranged self-locking telescopic rods are fixedly installed on the top of the transfer flatbed truck. The telescopic ends of the self-locking telescopic rods are fixedly installed with support frames. Horizontal sliding rods are slidably installed on the support frames. One end of each of the plurality of horizontal sliding rods away from the transfer flatbed truck is fixedly installed with a mounting frame. A same paving layer thickness measuring assembly is arranged at the bottom of the plurality of mounting frames; The paving layer thickness measuring component is used to measure the vertex thickness of the bridge concrete paving layer. The paving layer thickness measuring component includes a four-claw suspension bracket fixedly installed at the bottom of a plurality of the mounting brackets. At the four bottom ends of the four-claw suspension bracket, there are fixedly installed inclined bottom-touching support rods. At the bottom ends of the bottom-touching support rods, there are thickness distribution measuring units for roughly measuring the thickness of the surrounding concrete paving layer. At the central position of the top of the four-claw suspension bracket, there is a universal ball rotatably installed. At the bottom of the universal ball, there is an external screw cylinder. The top end of the external screw cylinder extends to the top of the universal ball. At the top of the universal ball, there is a lifting motor fixedly installed. The output shaft of the lifting motor is drivingly installed with a flower-shaped rod. The bottom end of the flower-shaped rod extends into the internal part of the external screw cylinder. An internal screw pipe is screwed inside the external screw cylinder. The flower-shaped rod is slidably inserted into the internal part of the internal screw pipe. The bottom end of the internal screw pipe extends to the outside of the external screw cylinder and is fixedly installed with a measuring pipe. On the side wall of the bottom end of the measuring pipe, there are a plurality of uniformly distributed communication grooves.

[0006] Further, the thickness distribution measuring unit includes a measuring sliding bracket fixedly sleeved on the bottom end of the bottom-touching support rod. On both sides of the measuring sliding bracket, there are a plurality of wear-reducing balls rotatably installed and uniformly distributed from top to bottom. A floating sleeve is slidably sleeved on the wear-reducing balls. On the side wall of the floating sleeve, there is a floating block fixedly installed.

[0007] Further, on the side wall of the floating sleeve, there is a first positioning electric push rod fixedly installed perpendicular to the measuring sliding bracket. On the side wall of the floating sleeve, there is a positioning hole. The telescopic end of the first positioning electric push rod is fixedly installed with a fastening block. The position of the fastening block corresponds to the position of the positioning hole.

[0008] Further, a sunshade weight plate is fixedly sleeved on the top end of the measuring pipe.

[0009] Further, an internal electric push rod is fixedly installed inside the top end of the measuring pipe. The telescopic end of the internal electric push rod faces downward and is fixedly installed with a measuring push plate. Inside the measuring push plate, there is a pressure sensor fixedly installed. At the bottom of the pressure sensor, there is an elastic member fixedly installed. At the bottom of the elastic member, there is a touch pressure plate fixedly installed. The touch pressure plate is slidably installed inside the measuring push plate.

[0010] Further, a plurality of vertically arranged placement brackets are fixedly installed on the top of the four-claw suspension bracket. At the top ends of the placement brackets, there are clamping claws rotatably installed. Between the plurality of clamping claws, there is the same cork disk placed. At the top of the lifting motor, there is a vertically arranged second positioning electric push rod fixedly installed. The telescopic end of the second positioning electric push rod is fixedly installed with a positioning pin. At the top of the lifting motor, there are a plurality of balance columns fixedly installed. The plurality of balance columns surround the second positioning electric push rod.

[0011] Furthermore, the tops of the positioning claws are provided with fastening holes, and positioning cone-head bolts are inserted into the insides of the fastening holes.

[0012] Furthermore, a pedal hole is provided on the top of the transfer cart, a pedal board is placed inside the pedal hole, and two vertically arranged return spring rods are fixedly installed on the top of the transfer cart, and the telescopic ends of the two return spring rods are respectively fixedly connected to the two sides of the pedal board.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention sets a pavement thickness measuring component so that four bottoming support rods contact the bridge deck, and the four-claw suspension frame is supported on the bridge deck. The lifting motor drives the bottom end of the measuring tube to contact the bridge deck. According to the scale line at the bottom end of the measuring tube, the thickness of the pavement layer at the current point can be measured. At the same time, the concrete inside and outside the measuring tube is flush, so that the construction personnel can simultaneously observe the height of the concrete layer on both sides of the measuring tube, and then more intuitively and conveniently obtain the pavement thickness at the current point; 2. The present invention sets a thickness distribution measurement unit, so that when the pavement layer thickness measurement assembly descends and the thickness is measured, the four measuring slides will be immersed in the concrete, and the floating sleeves and the floating blocks will float upward, so that the floating sleeves will slide upward along the measuring slides until they are stable and motionless. Therefore, the concrete thickness around the measuring point can be roughly calculated according to the position where the floating sleeves and the floating blocks stay on the measuring slides, so as to obtain the distribution of the pavement layer thickness around the measuring point, reduce the number of measurements, and make the thickness distribution of the pavement layer more intuitive. 3. The present invention sets a first positioning electric push rod, so that when the floating sleeve and the floating block are stable and motionless, the first positioning electric push rod on one side of the floating sleeve starts to start, and the telescopic end of the first positioning electric push rod drives the fastening block to pass through the positioning hole and press on one side of the measuring slide, thereby locking the floating sleeve on the measuring slide. When the measurement is completed, the surveyor can retract the pavement thickness measurement assembly. At this time, each floating sleeve still stays in the position after floating, thereby showing the thickness of the pavement layer around the point, which is convenient for subsequent measurement work; 4. The present invention provides a sunshade weight disk, which is made of a material with a relatively high density. The sunshade weight disk can be located at the bottom of the outer screw barrel to play the role of a plumb line, so that the part from the lifting motor to the bottom of the measuring tube remains vertical, and the measuring tube will not be skewed due to contact with the pavement layer, thereby affecting the measurement accuracy. At the same time, it can be located at the top of the measuring tube to prevent ambient light from directly shining on the measuring tube and affecting the reading of the point thickness data. 5. By providing a measuring push plate in the present invention, the built-in electric push rod drives the measuring push plate to slide downward until the pressure contact plate touches the concrete, and then the telescopic end of the built-in electric push rod stops moving, so that the pressure contact plate stays near the surface layer of the paving layer. The measuring personnel can cross-verify according to the staying position of the pressure contact plate and the thickness data obtained from previous observations, improving the accuracy of the data. At the same time, the built-in electric push rod can drive the measuring push plate to push out the residual concrete inside the measuring pipe, facilitating the subsequent cleaning work of the paving layer thickness measuring assembly; 6. By providing a cork disc in the present invention, after the measuring pipe touches the bridge deck and positions itself, the second positioning electric push rod will drive the positioning pin to insert upward into the inside of the cork disc, thereby fixing the paving layer thickness measuring assembly. When recovering the paving layer thickness measuring assembly, the paving layer thickness measuring assembly can also maintain the angle during measurement under the positioning action of the positioning pin and the cork disc, facilitating the measuring personnel to reproduce the thickness distribution condition of the paving layer during measurement by combining the angle of the paving layer thickness measuring assembly and the position of the thickness distribution measuring unit; 7. By providing positioning cone head bolts in the present invention, after multiple measurements, each positioning cone head bolt can be screwed out from the upper surface and fastening holes of the cork disc, the respective clamping claws are rotated, the cork disc is removed, and then the cork disc is horizontally rotated, vertically flipped or directly replaced, and then the cork disc is reinstalled and each positioning cone head bolt is tightened to prevent the pinholes generated by the previous insertion of the positioning pin from affecting the subsequent positioning accuracy; 8. By providing a treadle in the present invention, the combination of the transfer trolley, the self-locking telescopic rod and the horizontal slide rod can conveniently move the paving layer thickness measuring assembly, and the paving layer thickness measuring assembly can be suspended above the point in the air on one side of the paving layer, expanding the measuring range of the point. And during measurement, the staff can step on the treadle, making the lower surface of the treadle contact an entity such as a road to position the transfer trolley, making the suspension of the paving layer thickness measuring assembly more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the transfer trolley of the present invention; Figure 3 is the three-dimensional structure schematic diagram of the paving layer thickness measuring assembly of the present invention; Figure 4 is the three-dimensional structure schematic diagram of the cooperation between the lifting motor and the measuring pipe of the present invention; Figure 5 is the internal three-dimensional structure schematic diagram of the outer screw cylinder and the inner screw pipe of the present invention; Figure 6 is the three-dimensional structure schematic diagram of the thickness distribution measuring unit of the present invention; Figure 7It is a schematic diagram of the internal three-dimensional structure of the measuring tube of the present invention; Figure 8 It is a schematic diagram of the internal three-dimensional structure of the measuring push plate of the present invention; Figure 9 It is a schematic diagram of the three-dimensional structure of the cooperation between the placement rack and the cork disc of the present invention; Reference numerals: 1, transfer trolley; 2, self-locking telescopic rod; 3, support frame; 4, horizontal slide bar; 5, mounting frame; 6, four-jaw suspension rack; 7, bottom-touching support rod; 8, universal ball; 9, external screw cylinder; 10, lifting motor; 11, flower-shaped rod; 12, internal screw tube; 13, measuring tube; 1301, communication groove; 14, measuring slide carriage; 15, anti-friction ball; 16, floating sleeve; 17, floating block; 18, first positioning electric push rod; 19, sunshade weight disc; 20, built-in electric push rod; 21, measuring push plate; 22, pressure sensor; 23, elastic member; 24, touch pressure plate; 25, placement rack; 26, clamping claw; 27, cork disc; 28, second positioning electric push rod; 29, positioning pin; 30, balance column; 31, positioning taper head bolt; 32, step pedal; 33, reset spring rod. Detailed implementation manners

[0015] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0018] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", "upper", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is 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 should not be construed as a limitation on the present invention.

[0019] As Figures 1 to 9 shown, a device for detecting the thickness of a concrete paving layer applied to bridge engineering includes a transfer trolley 1. As Figure 2 shown, a plurality of vertically arranged self-locking telescopic rods 2 are fixedly installed on the top of the transfer trolley 1. The telescopic ends of the self-locking telescopic rods 2 are fixedly installed with support frames 3. Horizontal sliding rods 4 are slidably installed on the support frames 3. One end of each of the plurality of horizontal sliding rods 4 away from the transfer trolley 1 is fixedly installed with a mounting frame 5. A paving layer thickness measuring assembly is arranged at the bottom of the plurality of mounting frames 5; The paving layer thickness measuring assembly is used to measure the vertex thickness of the bridge concrete paving layer. As Figure 3 shown, the paving layer thickness measuring assembly includes a four-claw suspension frame 6 fixedly installed at the bottom of the plurality of mounting frames 5. Four inclined bottom-touching support rods 7 are fixedly installed at the four bottom ends of the four-claw suspension frame 6. Thickness distribution measuring units for roughly measuring the thickness of the surrounding concrete paving layer are arranged at the bottom ends of the bottom-touching support rods 7. As Figure 4 shown, a universal ball 8 is rotatably installed at the center position of the top of the four-claw suspension frame 6. An external screw cylinder 9 is fixedly installed at the bottom of the universal ball 8. The top end of the external screw cylinder 9 extends to the top of the universal ball 8. A lifting motor 10 is fixedly installed at the top of the universal ball 8. As Figure 5As shown in the figure, the output shaft of the lifting motor 10 is drivingly installed with a flower-shaped rod 11. The bottom end of the flower-shaped rod 11 extends into the inner part of the outer screw cylinder 9. An inner screw pipe 12 is screwed inside the outer screw cylinder 9. The flower-shaped rod 11 is slidably inserted into the inner part of the inner screw pipe 12. The bottom end of the inner screw pipe 12 extends to the outside of the outer screw cylinder 9 and is fixedly installed with a measuring pipe 13. In this embodiment, the lifting motor 10 is internally provided with a pressure sensing system. When the measuring pipe 13 contacts the bridge deck, the measuring pipe 13 stops descending. The pressure sensing system senses that the pressure suddenly increases and controls the lifting motor 10 to lock immediately. The bottom side wall of the measuring pipe 13 is provided with uniformly distributed scale lines. The measuring pipe 13 is made of a transparent material. A plurality of uniformly distributed communication grooves 1301 are opened on the bottom side wall of the measuring pipe 13. Specifically, when the concrete paving layer thickness detection device applied to bridge engineering is in use, after the concrete is paved, the construction personnel immediately push the transfer trolley 1 carrying the paving layer thickness measuring assembly to a position near the point where the paving layer thickness needs to be measured. Then, the horizontal sliding rod 4 is pushed, so that a plurality of horizontal sliding rods 4 slide along the support frame 3 and drive the paving layer thickness measuring assembly to move above the point. After that, the self-locking telescopic rod 2 is lowered, so that the paving layer thickness measuring assembly starts to descend. By setting the paving layer thickness measuring assembly, the self-locking telescopic rod 2 drives the four-claw suspension bracket 6 to descend until the four bottom-touching support rods 7 are immersed in the paving layer and contact the bridge deck, and the four-claw suspension bracket 6 is supported on the bridge deck. Then, the lifting motor 10 is remotely controlled to start. At this time, components such as the lifting motor 10, the outer screw cylinder 9, and the measuring pipe 13 will remain vertical under the action of gravity and the rotation of the universal ball 8. The lifting motor 10 drives the inner screw pipe 12 to rotate in the outer screw cylinder 9 through the flower-shaped rod 11, and then drives the measuring pipe 13 to descend until the bottom end of the measuring pipe 13 touches the bridge deck. The lifting motor 10 stops rotating. At this time, the immersion depth of the measuring pipe 13 can be observed according to the scale line at the bottom end of the measuring pipe 13, so as to measure the thickness of the paving layer at the current point. At the same time, the concrete still having fluid characteristics will flow into the inside of the measuring pipe 13 through the communication grooves 1301 at the bottom end of the measuring pipe 13, making the concrete inside and outside the measuring pipe 13 flush, so that the construction personnel can observe the heights of the concrete layers on both the inside and outside sides of the measuring pipe 13 at the same time, and thus more intuitively and conveniently obtain the thickness of the paving layer at the current point.

[0020] As Figure 3 shown, the thickness distribution measuring unit includes a measuring slide frame 14 fixedly sleeved on the bottom end of the bottom-touching support rod 7. As Figure 6As shown in the figure, a plurality of wear-reducing balls 15 evenly distributed from top to bottom are rotatably installed on both sides of the measuring carriage 14. A floating sleeve 16 is slidably sleeved on the wear-reducing balls 15. In this embodiment, the floating sleeve 16 does not contact the measuring carriage 14, and the inner wall of the floating sleeve 16 only contacts the plurality of wear-reducing balls 15 on both sides of the measuring carriage 14. A floating block 17 is fixedly installed on the side wall of the floating sleeve 16. Specifically, by setting the thickness distribution measuring unit, when the paving layer thickness measuring assembly descends and measures the thickness of the positioning, the four measuring carriages 14 will sink into the concrete, and the floating sleeve 16 and the floating block 17 will float upward, causing the floating sleeve 16 to slide upward along the measuring carriage 14 until it stabilizes and stops. Thus, the thickness of the concrete around the measuring point can be roughly estimated according to the positions where the floating sleeve 16 and the floating block 17 stay on the measuring carriage 14, so as to obtain the thickness distribution of the paving layer around the measuring point, reduce the number of measurements, and make the thickness distribution of the paving layer more intuitively displayed.

[0021] As Figure 6 shown, a first positioning electric push rod 18 perpendicular to the measuring carriage 14 is fixedly installed on the side wall of the floating sleeve 16. A positioning hole is formed on the side wall of the floating sleeve 16. A fastening block is fixedly installed at the telescopic end of the first positioning electric push rod 18, and the position of the fastening block corresponds to the position of the positioning hole. Specifically, by setting the first positioning electric push rod 18, when the floating sleeve 16 and the floating block 17 are stable and stationary, the first positioning electric push rod 18 on one side of the floating sleeve 16 starts to operate. The telescopic end of the first positioning electric push rod 18 drives the fastening block to pass through the positioning hole and press against one side of the measuring carriage 14, thereby locking the floating sleeve 16 on the measuring carriage 14. When the measurement is completed, the measurement personnel can retract the paving layer thickness measuring assembly. At this time, each floating sleeve 16 still stays at the position after floating, thus showing the thickness of the paving layer around the point, which is convenient for subsequent calculation work.

[0022] As Figure 4 shown, a sunshade plumb bob disc 19 is fixedly sleeved at the top end of the measuring tube 13. Specifically, by setting the sunshade plumb bob disc 19, the sunshade plumb bob disc 19 is made of a material with a relatively large density. The sunshade plumb bob disc 19 can not only act as a plumb bob at the bottom of the outer screw tube 9, keeping the part from the lifting motor 10 to the bottom end of the measuring tube 13 vertical and preventing the measuring tube 13 from being skewed due to contact with the paving layer, which affects the measurement accuracy, but also be at the top end of the measuring tube 13 to avoid direct sunlight on the measuring tube 13 and affect the reading of the point thickness data.

[0023] As Figure 7 shown, an internal electric push rod 20 is fixedly installed inside the top end of the measuring tube 13. The telescopic end of the internal electric push rod 20 faces downward and is fixedly installed with a measuring push plate 21, as Figure 8As shown in the figure, a pressure sensor 22 is fixedly installed inside the measuring push plate 21. A bottom of the pressure sensor 22 is fixedly installed with an elastic member 23. A bottom of the elastic member 23 is fixedly installed with a contact pressure plate 24. The contact pressure plate 24 is slidably installed inside the measuring push plate 21. Specifically, by providing the measuring push plate 21, after the measuring tube 13 contacts the bridge deck, the built-in electric push rod 20 can be controlled to drive the measuring push plate 21 to slide downward inside the measuring tube 13 until the contact pressure plate 24 at the bottom of the measuring push plate 21 contacts the concrete inside the measuring tube 13. Thus, a reaction pressure is applied to the pressure sensor 22 through the elastic member 23, causing the pressure sensor 22 to transmit a control signal, stopping the telescopic end of the built-in electric push rod 20 from moving, and thus making the contact pressure plate 24 stay near the surface of the paving layer. After recovering the paving layer thickness measuring assembly, the measuring personnel can cross-verify according to the staying position of the contact pressure plate 24 and the previously observed thickness data to improve the accuracy of the data. At the same time, the built-in electric push rod 20 can drive the measuring push plate 21 to continue sliding to push out the residual concrete inside the measuring tube 13, facilitating the subsequent cleaning work of the paving layer thickness measuring assembly.

[0024] As Figure 3 shown, a plurality of vertically arranged placement racks 25 are fixedly installed at a top of the four-claw suspension rack 6. As Figure 9 shown, clamping claws 26 are rotatably installed at tops of the placement racks 25. The same cork disk 27 is placed among the plurality of clamping claws 26. As Figure 4 shown, a vertically arranged second positioning electric push rod 28 is fixedly installed at a top of the lifting motor 10. A positioning pin 29 is fixedly installed at a telescopic end of the second positioning electric push rod 28. A plurality of balance columns 30 are fixedly installed at the top of the lifting motor 10. The plurality of balance columns 30 surround the second positioning electric push rod 28. Specifically, by providing the cork disk 27, after the measuring tube 13 contacts the bridge deck and positions itself, the second positioning electric push rod 28 at the top of the lifting motor 10 will drive the positioning pin 29 to move upward until it is inserted into the lower surface inside the cork disk 27. Furthermore, the cork disk 27 is fixed from the upper end through the positioning pin 29 and the second positioning electric push rod 28 for the paving layer thickness measuring assembly. When recovering the paving layer thickness measuring assembly, the paving layer thickness measuring assembly can also maintain the angle during measurement under the positioning action of the positioning pin 29 and the cork disk 27, thus facilitating the measuring personnel to reproduce the thickness distribution condition of the paving layer during measurement in combination with the angle of the paving layer thickness measuring assembly and the position of the thickness distribution measuring unit.

[0025] As Figure 9As shown, fastening holes are provided at the tops of the clamping claws 26, and positioning taper bolts 31 are inserted into the interiors of the fastening holes. Specifically, by providing the positioning taper bolts 31, after multiple measurements, each positioning taper bolt 31 can be screwed out from the upper surface of the cork disk 27 and the fastening holes, the clamping claws 26 are rotated, the cork disk 27 is removed, then the cork disk 27 is horizontally rotated, vertically flipped or directly replaced, and then the cork disk 27 is reinstalled and each positioning taper bolt 31 is tightened to prevent the pinholes generated by the previous insertion of the positioning pins 29 from affecting the subsequent positioning accuracy.

[0026] As Figure 2 As shown, a stepping hole is provided at the top of the transfer trolley 1, a foot pedal 32 is placed inside the stepping hole, and two vertically arranged return spring rods 33 are fixedly installed at the top of the transfer trolley 1. The telescopic ends of the two return spring rods 33 are respectively fixedly connected to both sides of the foot pedal 32. Specifically, by providing the foot pedal 32, the combination of the transfer trolley 1, the self-locking telescopic rod 2, and the horizontal sliding rod 4 can facilitate the movement of the paving layer thickness measuring assembly. The paving layer thickness measuring assembly can be suspended above the point in the air on one side of the paving layer, expanding the measuring range of the point. And during the measurement, the staff can step on the foot pedal 32 to make the lower surface of the foot pedal 32 contact an entity such as a road to position the transfer trolley 1 and make the suspension of the paving layer thickness measuring assembly more stable.

[0027] In summary: Before measurement: After the concrete paving, the construction workers immediately push the transfer trolley 1 carrying the paving layer thickness measuring assembly to move near the point where the paving layer thickness needs to be measured. The staff steps on the foot pedal 32 to make the lower surface of the foot pedal 32 contact an entity such as a road to position the transfer trolley 1, and then push the horizontal sliding rod 4 to make multiple horizontal sliding rods 4 slide along the support frame 3 and drive the paving layer thickness measuring assembly to move above the point. Then lower the self-locking telescopic rod 2 to make the paving layer thickness measuring assembly start to descend. The self-locking telescopic rod 2 drives the four-claw suspension bracket 6 to descend until the four bottom-touching support rods 7 are immersed in the paving layer and contact the bridge deck, supporting the four-claw suspension bracket 6 on the bridge deck. Then remotely control the lifting motor 10 to start. At this time, components such as the lifting motor 10, the outer screw cylinder 9, and the measuring tube 13 will remain vertical under the action of gravity and the rotation of the universal ball 8. The lifting motor 10 drives the inner screw tube 12 to rotate in the outer screw cylinder 9 through the flower-shaped rod 11, thereby driving the measuring tube 13 to descend until the bottom end of the measuring tube 13 touches the bridge deck. The lifting motor 10 stops rotating, and the second positioning electric push rod 28 at the top of the lifting motor 10 will drive the positioning pin 29 to move upward until it is inserted into the inner part of the lower surface of the cork disk 27, so that the cork disk 27 fixes the paving layer thickness measuring assembly from the upper end through the positioning pin 29 and the second positioning electric push rod 28; During measurement: Control the built-in electric push rod 20 to drive the measurement push plate 21 to slide downward inside the measurement tube 13 until the pressure plate 24 at the bottom of the measurement push plate 21 contacts the concrete inside the measurement tube 13. Thus, the elastic member 23 gives a reaction pressure to the pressure sensor 22, causing the pressure sensor 22 to transmit a control signal, stopping the movement of the telescopic end of the built-in electric push rod 20, and making the pressure plate 24 stay near the surface of the paving layer. The staff observes the immersion depth of the measurement tube 13 according to the scale line at the bottom end of the measurement tube 13, thereby measuring the thickness of the paving layer at the current point. Meanwhile, the concrete still having fluid characteristics will flow into the inside of the measurement tube 13 through the communication groove 1301 at the bottom end of the measurement tube 13, making the concrete inside and outside the measurement tube 13 level. This enables the construction personnel to simultaneously observe the heights of the concrete layers on both the inside and outside of the measurement tube 13. When the paving layer thickness measurement assembly descends and measures the thickness at the positioning point, the four measurement sliding frames 14 will immerse into the concrete, and the floating sleeve 16 and the floating block 17 will float upward, causing the floating sleeve 16 to slide upward along the measurement sliding frame 14 until it stabilizes. The first positioning electric push rod 18 on one side of the floating sleeve 16 starts to operate. The telescopic end of the first positioning electric push rod 18 drives the fastening block to pass through the positioning hole and press against one side of the measurement sliding frame 14, thereby locking the floating sleeve 16 on the measurement sliding frame 14. Thus, the thickness of the concrete around the measurement point can be roughly estimated according to the positions where the floating sleeve 16 and the floating block 17 stay on the measurement sliding frame 14, and the thickness distribution of the paving layer around the measurement point can be obtained; After measurement: After recovering the paving layer thickness measurement assembly, the paving layer thickness measurement assembly can also maintain the angle during measurement under the positioning action of the positioning pin 29 and the cork disk 27. This facilitates the measurement personnel to reproduce the thickness distribution condition of the paving layer during measurement by combining the angle of the paving layer thickness measurement assembly and the position of the thickness distribution measurement unit. The measurement personnel can perform cross-verification based on the staying position of the pressure plate 24 and the previously observed thickness data. Meanwhile, the built-in electric push rod 20 can drive the measurement push plate 21 to continue sliding, pushing out the residual concrete inside the measurement tube 13, facilitating the subsequent cleaning work of the paving layer thickness measurement assembly. After multiple measurements, the positioning cone bolts 31 can be unscrewed from the upper surface and the fastening holes of the cork disk 27, the clamping claws 26 can be rotated, and the cork disk 27 can be removed. Then, the cork disk 27 can be horizontally rotated, vertically flipped, or directly replaced, and then the cork disk 27 can be reinstalled and the positioning cone bolts 31 can be tightened to prevent the pinholes generated by the previous insertion of the positioning pin 29 from affecting the subsequent positioning accuracy.

[0028] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A concrete paving layer thickness detection device applied to bridge engineering, characterized in that, It includes a transfer trolley (1). A plurality of vertically arranged self-locking telescopic rods (2) are fixedly installed on the top of the transfer trolley (1). The telescopic ends of the self-locking telescopic rods (2) are all fixedly installed with support frames (3). Horizontal sliding rods (4) are slidably installed on the support frames (3). One end of each of the plurality of horizontal sliding rods (4) away from the transfer trolley (1) is fixedly installed with a mounting frame (5). A same paving layer thickness measuring assembly is arranged at the bottom of the plurality of mounting frames (5). The paving layer thickness measuring assembly is used for measuring the vertex thickness of the bridge concrete paving layer. The paving layer thickness measuring assembly includes a four-claw suspension frame (6) fixedly installed at the bottom of the plurality of mounting frames (5). Obliquely arranged bottom-touching support rods (7) are fixedly installed at the four bottom ends of the four-claw suspension frame (6). Thickness distribution measuring units for measuring the thickness of the surrounding concrete paving layer are arranged at the bottom ends of the bottom-touching support rods (7). A universal ball (8) is rotatably installed at the center position of the top of the four-claw suspension frame (6). An external screw cylinder (9) is fixedly installed at the bottom of the universal ball (8). The top end of the external screw cylinder (9) extends to the top of the universal ball (8). A lifting motor (10) is fixedly installed at the top of the universal ball (8). A flower-shaped rod (11) is drivingly installed on the output shaft of the lifting motor (10). The bottom end of the flower-shaped rod (11) extends into the internal part of the external screw cylinder (9). An internal screw pipe (12) is screwed inside the external screw cylinder (9). The flower-shaped rod (11) is slidably inserted into the internal part of the internal screw pipe (12). The bottom end of the internal screw pipe (12) extends to the outside of the external screw cylinder (9) and is fixedly installed with a measuring pipe (13). A plurality of uniformly distributed communication grooves (1301) are formed on the side wall of the bottom end of the measuring pipe (13).

2. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 1, characterized in that, The thickness distribution measuring unit includes a measuring sliding frame (14) fixedly sleeved on the bottom end of the bottom-touching support rod (7). A plurality of wear-reducing balls (15) evenly distributed from top to bottom are rotatably installed on both sides of the measuring sliding frame (14). A floating sleeve (16) is slidably sleeved on the wear-reducing balls (15). A floating block (17) is fixedly installed on the side wall of the floating sleeve (16).

3. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 2, wherein, A first positioning electric push rod (18) perpendicular to the measuring sliding frame (14) is fixedly installed on the side wall of the floating sleeve (16). A positioning hole is formed on the side wall of the floating sleeve (16). A fastening block is fixedly installed at the telescopic end of the first positioning electric push rod (18). The position of the fastening block corresponds to the position of the positioning hole.

4. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 1, wherein, A sunshade weight plate (19) is fixedly sleeved at the top end of the measuring pipe (13).

5. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 1, wherein, Inside the top end of the measurement tube (13), a built-in electric push rod (20) is fixedly installed. The telescopic end of the built-in electric push rod (20) faces downward and is fixedly installed with a measurement push plate (21). Inside the measurement push plate (21), a pressure sensor (22) is fixedly installed. At the bottom of the pressure sensor (22), an elastic member (23) is fixedly installed. At the bottom of the elastic member (23), a touch pressure plate (24) is fixedly installed. The touch pressure plate (24) is slidably installed inside the measurement push plate (21).

6. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 1, characterized in that, At the top of the four-jaw suspension bracket (6), a plurality of vertically arranged placement brackets (25) are fixedly installed. At the top ends of the placement brackets (25), clamping jaws (26) are rotatably installed. A same cork disk (27) is placed among the plurality of clamping jaws (26). At the top of the lifting motor (10), a vertically arranged second positioning electric push rod (28) is fixedly installed. The telescopic end of the second positioning electric push rod (28) is fixedly installed with a positioning pin (29). At the top of the lifting motor (10), a plurality of balance columns (30) are fixedly installed. The plurality of balance columns (30) surround the circumference of the second positioning electric push rod (28).

7. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 6, characterized in that, At the top of each of the clamping jaws (26), fastening holes are formed. Inside the fastening holes, positioning taper head bolts (31) are inserted respectively.

8. The thickness detection device for the concrete paving layer applied to bridge engineering according to claim 1, wherein, On the top of the transfer trolley (1), a stepping hole is formed. Inside the stepping hole, a stepping plate (32) is placed. On the top of the transfer trolley (1), two vertically arranged return spring rods (33) are fixedly installed. The telescopic ends of the two return spring rods (33) are fixedly connected to both sides of the stepping plate (32) respectively.

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