A large-section concrete structure crack monitoring device

Abstract

The invention relates to a large-section concrete structure crack monitoring device applied to the field of concrete detection. During detection, a wheel power module is started and a measuring frame is driven to move along the crack by a walking wheel. Under the action of a synchronous control module, the moving speed of the measuring frame is equal to the moving speed of a mark belt. During the movement of the measuring frame, the mark belt attached to the concrete extends into the crack to form crack convex patterns on the surface of the mark belt. When the crack convex patterns move to the inside of a cooling chamber, the mark belt and the crack convex patterns are hardened, and a roller is attached to the hardened crack convex patterns. During the rotation of the mark belt, the roller rotates along the crack convex patterns and drives a connecting shaft to rotate. A counter obtains the rotation data of the connecting shaft to obtain the length of the crack convex patterns, and finally obtains the total length of the crack. Through the above arrangement, the accurate lengths of cracks of different shapes can be accurately measured along the crack trajectory, thereby improving the data standard for crack evaluation.

Description

Technical Field

[0001] The invention relates to a crack monitoring device, in particular to a large-section concrete structure crack monitoring device applied in the field of concrete detection. Background Art

[0002] Concrete structures are widely used in construction projects. However, due to temperature changes, load effects and the properties of the material itself, cracks may appear in concrete structures during long-term use. The length, width and depth of the cracks are the standards for judging whether the concrete can meet the structural integrity, bearing capacity and safety standards. Currently, a ruler is mainly used to measure the length of the cracks. Since the shape of the cracks is irregular and has many bends, and since there are many bends in the cracks, most of the measurements are made by estimation, and the length of the cracks cannot be accurately obtained, which affects the judgment criteria for concrete cracks. Summary of the invention

[0003] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that, since there are many bends in the cracks, most of the measurements are made by estimation, and the length of the cracks cannot be accurately obtained, which affects the judgment criteria for concrete cracks.

[0004] In order to solve the above problems, the present invention provides a large-section concrete structure crack monitoring device, including a measuring frame, the inner wall of the measuring frame is rotatably connected to four rectangularly distributed rollers, an imprint belt is rotatably connected between the four rollers, the inner wall of the measuring frame is fixedly connected to a plurality of preheaters, the plurality of preheaters are all located on the inner side of the imprint belt, the inner wall of the top of the measuring frame is fixedly connected to a partition, the measuring frame is located on one side of the partition as a heating chamber, the measuring frame is located on the other side of the partition as a cooling chamber, the inner wall of the heating chamber is fixedly connected to an electric heater, the inner wall of the cooling chamber is fixedly connected to a cold fan, and the end of the measuring frame close to the cold fan is fixedly connected to a mounting frame. The inner wall of the mounting frame is slidably connected with a push-pull plate, one end of the push-pull plate is fixedly connected to the mounting frame with a top spring, the other end of the push-pull plate is fixedly connected to a support rod, one end of the support rod is fixedly connected to the mounting plate, one end of the mounting plate is rotatably connected to a connecting shaft, one end of the mounting plate close to the connecting shaft is fixedly connected to a counter, one end of the connecting shaft is fixedly connected to a roller, and the other end of the connecting shaft is rotatably connected to the counter, the outer wall of the measuring frame is fixedly connected to a walking wheel, and also includes a wheel power module for driving the walking wheel, a shaft power module for driving the roller, and a synchronous control module, and the synchronous control module is electrically connected to the wheel power module and the shaft power module.

[0005] As a further improvement of the present application, the imprint belt is composed of a base layer and a protective film, the base layer is attached to the rotating roller, and a thermoplastic resin is filled between the base layer and the protective film.

[0006] As a further improvement of the present application, the support rod is composed of vertical bars and lifting bars, the vertical bars are connected to the push-pull plates and the vertical bars are perpendicular to the imprint belt, and the lifting bars and the imprint belt are inclined to each other.

[0007] As a further improvement of the present application, the connection point between the vertical bar and the lifting bar is located on the outside of the edge of the imprint belt, and the end of the lifting bar away from the vertical bar is located on the inside of the edge.

[0008] As another improvement of the present application, a storage groove is provided at one end of the mounting plate close to the roller, the roller is located on the inner side of the storage groove, the support rod, the mounting plate and the bottom surface of the roller are on the same plane, and the distance between the bottom surface of the roller and the imprint belt is less than one millimeter.

[0009] As another improved supplement of the present application, an external heater is fixedly connected to one end of the measuring frame close to the cooling chamber.

[0010] As another improved supplement of the present application, a pressure sensor is fixedly connected to the inner wall of the installation frame on one side of the push-pull plate, an alarm is fixedly connected to one end of the installation frame, and the pressure sensor and the alarm are electrically connected.

[0011] To summarize, during detection, the wheel power module is started and the measuring frame is driven to move along the crack through the walking wheel. Under the action of the synchronous control module, the moving speed of the measuring frame is equal to the moving speed of the imprint belt. During the movement of the measuring frame, the imprint belt attached to the concrete extends into the interior of the crack to form crack convexities on the surface of the imprint belt. When the crack convexities move to the interior of the cooling chamber, the imprint belt and the crack convexities harden, and the roller is attached to the hardened crack convexities. During the rotation of the imprint belt, the roller rotates along the crack convexities and drives the connecting shaft to rotate. The counter obtains the rotation data of the connecting shaft to obtain the length of the crack convexities, and finally obtains the total length of the crack. Through the above settings, the accurate lengths of cracks of different shapes can be accurately measured along the trajectory of the crack, thereby improving the data standard for crack judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the entirety of the first and second embodiments of the present application;

[0013] Figure 2 This is a front cross-sectional view of the measurement frame in the first embodiment of the present application;

[0014] Figure 3 A side view of the support rod in the first embodiment of the present application;

[0015] Figure 4 This is a front cross-sectional view of the imprint zone in the first embodiment of the present application;

[0016] Figure 5This is a state diagram of the first embodiment of the present application when the imprint belt is embedded in the crack;

[0017] Figure 6 This is a state diagram of the crack convex pattern when squeezing the lifting strip in the first and second embodiments of the present application;

[0018] Figure 7 This is a state diagram of the roller rotating along the crack convex pattern in the first and second embodiments of the present application.

[0019] Description of the numbers in the figure:

[0020] 1. Measuring frame; 2. Roller; 3. Imprint belt; 301. Base layer; 302. Protective film; 303. Thermoplastic resin; 4. Partition; 5. Heating chamber; 6. Cooling chamber; 7. Electric heater; 8. Cooling fan; 9. Mounting frame; 10. Push-pull plate; 11. Top spring; 12. Support rod; 13. Mounting plate; 14. Connecting shaft; 15. Roller; 16. Counter; 17. Preheater; 18. Vertical bar; 19. Lifting bar; 20. Storage tank; 21. External heater; 22. Pressure sensor; 23. Alarm; 24. Traveling wheel. DETAILED DESCRIPTION

[0021] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0022] The first implementation method:

[0023] Figure 1-7A large-section concrete structure crack monitoring device is shown, comprising a measuring frame 1, the inner wall of the measuring frame 1 is rotatably connected to four rectangularly distributed rollers 2, an imprint belt 3 is rotatably connected between the four rollers 2, a plurality of preheaters 17 are fixedly connected to the inner wall of the measuring frame 1, and the plurality of preheaters 17 are all located on the inner side of the imprint belt 3, a partition 4 is fixedly connected to the inner wall of the top of the measuring frame 1, one side of the measuring frame 1 located on the partition 4 is set as a heating chamber 5, and the other side of the measuring frame 1 located on the partition 4 is set as a cooling chamber 6, an electric heater 7 is fixedly connected to the inner wall of the heating chamber 5, a cold fan 8 is fixedly connected to the inner wall of the cooling chamber 6, an installation frame 9 is fixedly connected to one end of the measuring frame 1 close to the cold fan 8, and a push-pull 8 is slidably connected to the inner wall of the installation frame 9. A top spring 11 is fixedly connected between one end of the pull plate 10 and the mounting frame 9, a support rod 12 is fixedly connected to the other end of the push-pull plate 10, one end of the support rod 12 is fixedly connected to a mounting plate 13, one end of the mounting plate 13 is rotatably connected to a connecting shaft 14, one end of the mounting plate 13 close to the connecting shaft 14 is fixedly connected to a counter 16, one end of the connecting shaft 14 is fixedly connected to a roller 15, and the other end of the connecting shaft 14 is rotatably connected to the counter 16, a walking wheel 24 is fixedly connected to the outer wall of the measuring frame 1, and also includes a wheel power module for driving the walking wheel 24 and a shaft power module and a synchronous control module for driving the roller 2, and the synchronous control module is electrically connected to the wheel power module and the shaft power module.

[0024] Before the detection, the preheater 17 is started to preheat the imprint belt 3. After the imprint belt 3 is heated and softened, the preheater 17 is turned off, the wheel power module is started and the measuring frame 1 is driven to move along the crack through the walking wheel 24, and the shaft power module is started at the same time to drive the imprint belt 3 to rotate through the roller 2, and under the action of the synchronous control module, the moving speed of the measuring frame 1 is equal to the moving speed of the imprint belt 3, and the electric heater 7 and the cooling fan 8 are started. In the process of the movement of the measuring frame 1, the imprint belt 3 attached to the concrete extends into the inside of the crack to form a crack convex pattern on the surface of the imprint belt 3. When the crack convex pattern moves to the inside of the cooling chamber 6, the cooling fan 8 heats the imprint belt 3. Cooling, at this time, the imprint belt 3 and the crack convex pattern inside the cooling chamber 6 are hardened, and the roller 15 is attached to the hardened crack convex pattern. During the rotation of the imprint belt 3, the roller 15 rotates along the crack convex pattern and drives the connecting shaft 14 to rotate. The counter 16 obtains the rotation data of the connecting shaft 14 to obtain the length of the crack convex pattern, and finally obtains the total length of the crack. Through the above-mentioned arrangement, the accurate length of cracks of different shapes can be accurately measured along the trajectory of the crack, which improves the data standard for crack judgment. When the imprint belt 3 moves from the inside of the cooling chamber 6 to the inside of the heating chamber 5, the electric heater 7 reheats the imprint belt 3 to soften it and attach it to the concrete.

[0025] The imprint belt 3 is composed of a base layer 301 and a protective film 302. The base layer 301 is attached to the roller 2. Thermoplastic resin 303 is filled between the base layer 301 and the protective film 302. Through the above arrangement, the base layer 301 can play a supporting role. The thermoplastic resin 303 softens when heated and hardens after cooling.

[0026] An external heater 21 is fixedly connected to one end of the measuring frame 1 close to the cooling chamber 6. The external heater 21 can heat the concrete, thereby preventing the imprint belt 3 from solidifying prematurely when encountering concrete with a lower temperature.

[0027] The second implementation method:

[0028] Figure 1 and Figure 6-7 A large-section concrete structure crack monitoring device is shown. Different from the first embodiment, the support rod 12 is composed of a vertical bar 18 and a lifting bar 19. The vertical bar 18 is connected to the push-pull plate 10 and the vertical bar 18 is perpendicular to the mark belt 3. The lifting bar 19 and the mark belt 3 are inclined to each other. The connection point between the vertical bar 18 and the lifting bar 19 is located on the outside of the edge of the mark belt 3, and the end of the lifting bar 19 away from the vertical bar 18 is located on the inside of the edge. A storage groove 20 is provided at one end of the mounting plate 13 close to the roller 15, and the roller 15 is located on the inner side of the storage groove 20. The bottom surfaces of the support rod 12, the mounting plate 13 and the roller 15 are on the same plane, and the distance between the bottom surface of the roller 15 and the mark belt 3 is less than one millimeter.

[0029] Through the above arrangement, when the head end of the crack convex pattern moves to the position of the lifting strip 19, the end of the crack convex pattern can be slidably connected with the lifting strip 19, pushing the push-pull plate 10 to move in a direction away from the imprint belt 3 until one end of the lifting strip 19 is located on one side of the end of the crack convex pattern. Through the above arrangement, the end of the crack convex pattern can be positioned.

[0030] A pressure sensor 22 is fixedly connected to the inner wall of the mounting frame 9 on one side of the push-pull plate 10, and an alarm 23 is fixedly connected to one end of the mounting frame 9. The pressure sensor 22 and the alarm 23 are electrically connected. Through the above arrangement, when the imprint belt 3 deviates from the crack, the imprint belt 3 no longer has the crack convex pattern. At this time, the push-pull plate 10 moves toward the direction of the alarm 23 under the action of the top spring 11 and triggers the alarm 23. The alarm 23 sounds an alarm to remind the staff that the imprint belt 3 deviates from the crack and adjusts the moving trajectory of the measuring frame 1.

[0031] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A large-section concrete structure crack monitoring device, comprising a measuring frame (1), characterized in that: The inner wall of the measuring frame (1) is rotatably connected to four rectangularly distributed rollers (2), and an imprint belt (3) is rotatably connected between the four rollers (2). The inner wall of the measuring frame (1) is fixedly connected to a plurality of preheaters (17), and the plurality of preheaters (17) are all located on the inner side of the imprint belt (3). The inner wall at the top of the measuring frame (1) is fixedly connected to a partition (4). The measuring frame (1) is located on one side of the partition (4) as a heating chamber (5), and the measuring frame (1) is located on the other side of the partition (4) as a cooling chamber (6). The inner wall of the heating chamber (5) is fixedly connected to an electric heater (7), and the inner wall of the cooling chamber (6) is fixedly connected to a cooling fan (8). The end of the measuring frame (1) close to the cooling fan (8) is fixedly connected to a mounting frame (9), and the inner wall of the mounting frame (9) is slidably connected to a push-pull plate (10). A top spring (11) is fixedly connected between one end of the push-pull plate (10) and the mounting frame (9), the other end of the push-pull plate (10) is fixedly connected to a support rod (12), one end of the support rod (12) is fixedly connected to a mounting plate (13), one end of the mounting plate (13) is rotatably connected to a connecting shaft (14), one end of the mounting plate (13) close to the connecting shaft (14) is fixedly connected to a counter (16), one end of the connecting shaft (14) is fixedly connected to a roller (15), the other end of the connecting shaft (14) is rotatably connected to the counter (16), the outer wall of the measuring frame (1) is fixedly connected to a walking wheel (24), and also includes a wheel power module for driving the walking wheel (24) and a shaft power module and a synchronous control module for driving the roller (2), the synchronous control module being electrically connected to the wheel power module and the shaft power module.

2. A large-section concrete structure crack monitoring device according to claim 1, characterized in that: The imprint belt (3) is composed of a base layer (301) and a protective film (302); the base layer (301) is attached to the rotating roller (2); and a thermoplastic resin (303) is filled between the base layer (301) and the protective film (302).

3. A large-section concrete structure crack monitoring device according to claim 1, characterized in that: The support rod (12) is composed of a vertical bar (18) and a lifting bar (19); the vertical bar (18) is connected to the push-pull plate (10), and the vertical bar (18) and the imprint belt (3) are perpendicular to each other; the lifting bar (19) and the imprint belt (3) are inclined to each other.

4. A large-section concrete structure crack monitoring device according to claim 3, characterized in that: The connection point between the vertical strip (18) and the lifting strip (19) is located outside the edge of the imprint belt (3), and the end of the lifting strip (19) away from the vertical strip (18) is located inside the edge.

5. A large-section concrete structure crack monitoring device according to claim 1, characterized in that: A storage groove (20) is formed at one end of the mounting plate (13) close to the roller (15), and the roller (15) is located inside the storage groove (20). The bottom surfaces of the support rod (12), the mounting plate (13) and the roller (15) are on the same plane, and the distance between the bottom surface of the roller (15) and the impression belt (3) is less than one millimeter.

6. A large-section concrete structure crack monitoring device according to claim 1, characterized in that: An external heater (21) is fixedly connected to one end of the measurement frame (1) close to the cooling chamber (6).

7. A large-section concrete structure crack monitoring device according to claim 1, characterized in that: A pressure sensor (22) is fixedly connected to the inner wall of the installation frame (9) located on one side of the push-pull plate (10), and an alarm (23) is fixedly connected to one end of the installation frame (9); the pressure sensor (22) and the alarm (23) are electrically connected.

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