Crack monitoring device for pipe gallery concrete structure

Abstract

The present application relates to the technical field of urban underground engineering construction, in particular to a pipe gallery concrete structure crack monitoring device, which comprises a fixing assembly, a transmission assembly and a monitoring assembly. The fixing assembly comprises a first mounting plate and a second mounting plate, which are respectively installed on the concrete structures on both sides of the crack. The transmission assembly comprises a driving gear roller shaft and a driven gear roller shaft, which are arranged in parallel and can rotate to drive the monitoring assembly to measure the gap of the concrete structure. The monitoring assembly comprises a monitoring belt and a fixing column, which is arranged below the driven gear roller shaft. The monitoring belt is rotatably connected to the fixing column and is wound around the driving gear roller shaft and the driven gear roller shaft. When measuring the crack width, the change of the concrete structure crack can be sensed according to the rotation of the monitoring belt between the driving gear roller shaft and the driven gear roller shaft, so that the crack change of the pipe gallery concrete structure can be monitored in real time with a simple structure.

Description

Technical Field

[0001] This invention relates to the field of urban underground engineering construction technology, specifically to a device for monitoring cracks in the concrete structure of a utility tunnel. Background Technology

[0002] Utility tunnels, also known as utility tunnels or municipal utility tunnels, are underground structures and ancillary facilities built in cities to accommodate two or more types of urban engineering pipelines. A utility tunnel typically consists of three main parts: the tunnel itself, the pipelines, and ancillary facilities. It is used to intensively lay various municipal pipelines such as electricity, communications, gas, water supply, drainage, and heating within it.

[0003] Over prolonged use, cracks may appear in the concrete structure of utility tunnels due to initial design flaws or thermal expansion and contraction of materials. Current technologies for monitoring these cracks typically employ sensors or image measurement. However, sensors have a limited measurement range, making them unsuitable for large-scale cracks; image measurement requires periodic image capture and system analysis to determine crack trends. Furthermore, sensor and image measurement systems are structurally complex and bulky, making them difficult to securely install within the utility tunnel. Summary of the Invention

[0004] This invention was made to solve the above-mentioned technical problems. One of its objectives is to provide a crack monitoring device for the concrete structure of a utility tunnel. By setting up a monitoring device with a simple structure that is easy to fix, the device enables real-time monitoring of crack changes in the concrete structure of the utility tunnel.

[0005] To achieve the above objectives, the present invention provides a crack monitoring device for a concrete structure of a utility tunnel, comprising: a fixing assembly including a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate being respectively mounted on the concrete structure on both sides of the crack; a transmission assembly including a driving toothed roller shaft and a driven toothed roller shaft, the driving toothed roller shaft being rotatably mounted on the first mounting plate and the driven toothed roller shaft being rotatably mounted on the second mounting plate, the driving toothed roller shaft and the driven toothed roller shaft being arranged in parallel; and a monitoring assembly including a monitoring belt and a fixing column, the fixing column being disposed below the driven toothed roller shaft, the monitoring belt being rotatably connected to the fixing column and the monitoring belt wrapping around the driving toothed roller shaft and the driven toothed roller shaft.

[0006] Preferably, it also includes a photoelectric encoder connected to the drive toothed roller shaft.

[0007] Preferably, it also includes a programmable controller connected to the photoelectric encoder.

[0008] Preferably, the monitoring belt is provided with scale markings.

[0009] Preferably, the monitoring component further includes a collection roller disposed below the drive toothed roller shaft.

[0010] Preferably, it further includes fasteners disposed at both ends of the first mounting plate and the second mounting plate.

[0011] Preferably, the first mounting plate and the second mounting plate are respectively provided with mounting holes at both ends, and the fastener is installed in the mounting holes.

[0012] Preferably, the fixing element is a fixing bolt.

[0013] Preferably, the first mounting plate and the second mounting plate are arranged in parallel.

[0014] Preferably, the transmission assembly further includes a damping shaft, which is fitted onto the driven toothed roller shaft and rotatably connected to the second mounting plate.

[0015] Based on the above description and practice, the pipe gallery concrete structure crack monitoring device of the present invention includes a fixing component, a transmission component, and a monitoring component. The fixing component includes a first mounting plate and a second mounting plate, which are respectively installed on the concrete structure on both sides of the crack to locate the crack in the concrete structure for subsequent monitoring of crack changes. The transmission component includes a driving toothed roller shaft and a driven toothed roller shaft. The driving toothed roller shaft is rotatably mounted on the first mounting plate, and the driven toothed roller shaft is rotatably mounted on the second mounting plate. The driving and driven toothed roller shafts are arranged in parallel, which allows the monitoring component to rotate while ensuring that the monitoring component measures the cracks in the concrete structure horizontally, avoiding damage to the monitoring component due to non-horizontal forces, thus affecting the effectiveness of the entire pipe gallery concrete structure crack monitoring device. The monitoring component includes a monitoring belt and a fixing column. The fixing column is located below the driven toothed roller shaft and can promptly retract the rotating monitoring belt to the fixing column, preventing the moved monitoring belt from affecting the normal rotation of the driving and driven toothed roller shafts. The monitoring belt is rotatably connected to the fixed column and rotates around the active toothed roller shaft and the driven toothed roller shaft. When measuring the crack width, the monitoring belt can sense the changes in the cracks in the concrete structure as it rotates between the active and driven toothed roller shafts. Furthermore, the expansion distance of the crack can be obtained based on the distance the monitoring belt moves. This allows for real-time monitoring of crack changes in the concrete structure of the pipe gallery with a simple structure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a crack monitoring device for a pipe gallery concrete structure according to one embodiment of the present invention.

[0017] Figure 2This is a schematic diagram of the structure of the first mounting plate of the pipe gallery concrete structure crack monitoring device according to one embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the second mounting plate of the pipe gallery concrete structure crack monitoring device according to one embodiment of the present invention.

[0019] The attached figures are labeled as follows: 1. Fixing assembly; 11. First mounting plate; 12. Second mounting plate; 13. Mounting hole; 2. Transmission assembly; 21. Driven toothed roller shaft; 22. Driven toothed roller shaft; 23. Damping shaft; 3. Monitoring assembly; 31. Monitoring belt; 32. Fixing post; 33. Scale mark; 34. Collecting roller; 4. Photoelectric encoder; 5. Programmable controller; 6. Fixing component. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0021] Furthermore, the accompanying drawings are merely illustrative diagrams of the present invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this invention disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0022] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] This invention discloses a device for monitoring cracks in the concrete structure of a utility tunnel, with reference to... Figures 1 to 3 The system includes a fixing component 1, a transmission component 2, and a monitoring component 3. The fixing component 1 includes a first mounting plate 11 and a second mounting plate 12, which are respectively installed on the concrete structure on both sides of the crack to locate the crack in the concrete structure for subsequent monitoring of crack changes. The transmission component 2 includes a driving toothed roller shaft 21 and a driven toothed roller shaft 22. The driving toothed roller shaft 21 is rotatably mounted on the first mounting plate 11, and the driven toothed roller shaft 22 is rotatably mounted on the second mounting plate 12. The driving toothed roller shaft 21 and the driven toothed roller shaft 22 are arranged in parallel, which can rotate to drive the monitoring component 3 to move while ensuring that the monitoring component 3 measures the crack in the concrete structure in the horizontal direction, avoiding damage to the monitoring component 3 due to non-horizontal forces, thus affecting the effectiveness of the entire pipe gallery concrete structure crack monitoring device. The monitoring component 3 includes a monitoring belt 31 and a fixed column 32. The fixed column 32 is located below the driven toothed roller shaft 22 and can promptly retract the rotating monitoring belt 31 back onto the fixed column 32, preventing the moved monitoring belt 31 from affecting the normal rotation of the driving toothed roller shaft 21 and the driven toothed roller shaft 22. The monitoring belt 31 is rotatably connected to the fixed column 32 and rotates around the driving toothed roller shaft 21 and the driven toothed roller shaft 22. When measuring the crack width, the monitoring belt 31 can sense changes in the cracks in the concrete structure as it rotates between the driving toothed roller shaft 21 and the driven toothed roller shaft 22. Furthermore, the distance the monitoring belt 31 moves can be used to obtain the crack widening distance. This allows for real-time monitoring of crack changes in the concrete structure of the pipe gallery using a simple structure.

[0024] In order to achieve real-time recording of crack expansion data, in some embodiments, the pipe gallery concrete structure crack monitoring device also includes a photoelectric encoder 4. The photoelectric encoder 4 is connected to the active toothed roller shaft 21, so that when the crack in the concrete structure expands, the angular displacement of the active toothed roller shaft 21 is recorded and converted into the moving distance. The photoelectric encoder 4 has a faster response speed and, compared with other encoders, does not come into contact with the mobile device during encoding conversion, has better anti-interference ability and longer service life.

[0025] Furthermore, to save and transcode the movement distance for subsequent analysis, in some embodiments, the pipe gallery concrete structure crack monitoring device also includes a programmable controller 5. The programmable controller 5 is connected to the photoelectric encoder 4, receives the movement distance data transmitted by the photoelectric encoder 4, converts the data into electrical signals, saves the data in the programmable controller 5, and analyzes the data. When the data analyzed in the programmable controller 5 is greater than the preset data, the cracks in the concrete structure have expanded to a large extent, requiring manual intervention or repair.

[0026] To simplify testing equipment and facilitate observation of crack movement by construction personnel when the concrete structure is exposed to the external environment, in some embodiments, the monitoring strip 31 is equipped with scale marks 33. When the concrete structure is exposed to the external environment and the cracks only expand or only contract, construction personnel can directly monitor the crack movement by reading the scale marks 33 on the monitoring strip 31. When the concrete structure is exposed to the external environment and the cracks both expand and contract over a period of time, construction personnel can compare the scale marks 33 on the monitoring strip 31 with the movement records on the external display screen to complete the monitoring of crack movement.

[0027] Understandably, to avoid the monitoring belt 31 becoming too long and affecting the normal rotation of the active and driven toothed roller shafts 21 and 22 as they move, in some embodiments, the monitoring assembly 3 further includes a collecting roller 34, which is disposed below the active toothed roller shaft 21. The collecting roller 34 is connected to the first mounting plate 11 via a torsion shaft. When the crack moves, the active toothed roller shaft 21 and the collecting roller 34 rotate together, and the monitoring belt 31, which moves with the active toothed roller shaft 21, wraps around the collecting roller 34, thus storing the monitoring belt 31. When the crack contracts and moves, the monitoring belt 31 between the fixed column 32 and the collecting roller 34 will loosen, and the collecting roller 34 connected by the torsion shaft will retract and rewind the monitoring belt 31 through its own elastic rotation performance. During the retraction and rewinding process of the monitoring belt 31, the monitoring belt 31 will drive the active toothed roller shaft 21 and the driven toothed roller shaft 22 to rotate in the opposite direction to the crack expansion. At this time, the photoelectric encoder 4 will also record the number of rotations and upload it to the programmable controller 5 to realize real-time monitoring of crack movement.

[0028] When cracks in the concrete structure within the utility tunnel expand, the first mounting plate 11 and the second mounting plate 12, respectively installed on both sides of the crack, move in opposite directions. The fixed column 32 moves along with the second mounting plate 12, pulling the monitoring belt 31, which in turn drives the active toothed roller shaft 21 and the driven toothed roller shaft 22 to rotate. As the active toothed roller shaft 21 rotates, the photoelectric encoder 4 records the number of rotations and converts it into the distance traveled. This data is then converted by the programmable controller 5 and transmitted to an external display connected to the programmable controller 5. Construction personnel can then view the expansion distance of the cracks in the concrete structure within the utility tunnel on the external display. When the cracks in the concrete structure inside the utility tunnel shrink, the first mounting plate 11 and the second mounting plate 12 move toward each other. At this time, the monitoring belt 31 loosens due to the movement of the first mounting plate 11 and the second mounting plate 12. The collecting roller 34 will shrink and rewind the monitoring belt 31 through its own elastic rotation performance. During the shrinking and rewinding process of the monitoring belt 31, the monitoring belt 31 will drive the active toothed roller shaft 21 and the driven toothed roller shaft 22 to rotate in the opposite direction to the crack expansion. At this time, the photoelectric encoder 4 will also record the number of rotations and convert it into distance. The programmable controller 5 will decode it and transmit it to the display on the ground end to realize real-time monitoring of the cracks in the concrete structure inside the utility tunnel.

[0029] Understandably, in order to stably fix the fixing component 1 to the concrete structure of the utility tunnel and prevent it from falling off due to the movement of the concrete structure, in some embodiments, the utility tunnel concrete structure crack monitoring device also includes a fixing element 6. The fixing element 6 is set at both ends of the first mounting plate 11 and the second mounting plate 12. The fixing element 6 stably installs both ends of the first mounting plate 11 and the second mounting plate 12 on the concrete structure of the utility tunnel, ensuring that the first mounting plate 11 and the second mounting plate 12 will not be misaligned as the concrete structure of the utility tunnel moves, and further ensuring the measurement accuracy of the utility tunnel concrete structure crack monitoring device.

[0030] For ease of operation, in some embodiments, the fastener 6 can be an adhesive connector such as glue, and the first mounting plate 11 and the second mounting plate 12 can be pasted onto the concrete structure of the pipe gallery, enabling construction personnel to quickly complete the installation of the monitoring device and speed up the construction efficiency.

[0031] In some embodiments, the fastener 6 may be a snap-fit ​​assembly. The slot may be pre-installed on the concrete structure of the utility tunnel or may be directly chiseled into the concrete structure of the utility tunnel. The snap-fit ​​is installed on the side of the first mounting plate 11 and the second mounting plate 12 near the concrete structure of the utility tunnel. The first mounting plate 11 and the second mounting plate 12 are fixedly installed on the concrete structure of the utility tunnel by snap-fit ​​installation between the slot and the snap-fit.

[0032] In some embodiments, mounting holes 13 are provided at both ends of the first mounting plate 11 and the second mounting plate 12, and the fastener 6 is installed in the mounting holes 13. The fastener 6 passes through both the mounting holes 13 and the pipe gallery concrete structure, thus fixing the first mounting plate 11 and the second mounting plate 12 onto the pipe gallery concrete structure.

[0033] Furthermore, to ensure the stability of the connection, the fastener 6 is a fixing bolt, and the inner wall of the mounting hole 13 has an internal thread. The tightness of the fastener 6 and the concrete structure of the pipe gallery can be adjusted according to actual needs. Construction workers can also use power tools to assist in the installation of the fastener 6, which further speeds up the construction efficiency.

[0034] Understandably, in order to reduce manufacturing costs, in some embodiments, the first mounting plate 11 and the second mounting plate 12 are arranged in parallel. In this case, the first mounting plate 11 and the second mounting plate 12 can be produced by the same mold. The active toothed roller shaft 21 and the driven toothed roller shaft 22 can be installed at the same position on the first mounting plate 11 and the second mounting plate 12 to achieve the parallel arrangement of the active toothed roller shaft 21 and the driven toothed roller shaft 22. This ensures that the monitoring belt 31 between the active toothed roller shaft 21 and the driven toothed roller shaft 22 will not be subjected to additional forces other than those in the horizontal direction when it moves, thus avoiding damage to the monitoring belt 31.

[0035] In some embodiments, the transmission assembly 2 further includes a damping shaft 23, which is fitted onto the driven toothed roller shaft 22 and rotatably connected to the second mounting plate 12. This ensures that when the cracks in the concrete structure of the pipe gallery move and the active toothed roller shaft 21 and the driven toothed roller shaft 22 drive the monitoring belt 31 to rotate, the rotation can be stopped at any time and will not be limited by a preset gear, further ensuring the measurement accuracy of the crack monitoring device for the concrete structure of the pipe gallery.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for monitoring cracks in a concrete structure of a utility tunnel, characterized in that, include: The fixing component includes a first mounting plate and a second mounting plate, which are respectively mounted on the concrete structures on both sides of the crack; The transmission assembly includes a driving toothed roller shaft and a driven toothed roller shaft. The driving toothed roller shaft is rotatably mounted on the first mounting plate, and the driven toothed roller shaft is rotatably mounted on the second mounting plate. The driving toothed roller shaft and the driven toothed roller shaft are arranged in parallel. The monitoring component includes a monitoring belt and a fixed post, the fixed post being disposed below the driven toothed roller shaft, the monitoring belt being rotatably connected to the fixed post and the monitoring belt wrapping around the driving toothed roller shaft and the driven toothed roller shaft.

2. The pipe gallery concrete structure crack monitoring device as described in claim 1, characterized in that, Also includes: An optical encoder is connected to the drive toothed roller shaft.

3. The pipe gallery concrete structure crack monitoring device as described in claim 2, characterized in that, Also includes: A programmable controller is connected to the photoelectric encoder.

4. The pipe gallery concrete structure crack monitoring device as described in claim 1, characterized in that, The monitoring belt is equipped with scale markings.

5. The pipe gallery concrete structure crack monitoring device as described in claim 1, characterized in that, The monitoring component also includes a collection roller disposed below the drive toothed roller shaft.

6. The pipe gallery concrete structure crack monitoring device as described in claim 1, characterized in that, Also includes: The fasteners are located at both ends of the first mounting plate and the second mounting plate.

7. The pipe gallery concrete structure crack monitoring device as described in claim 6, characterized in that, The first mounting plate and the second mounting plate are respectively provided with mounting holes at both ends, and the fastener is installed in the mounting holes.

8. The pipe gallery concrete structure crack monitoring device as described in claim 6, characterized in that, The fastener is a fixing bolt.

9. The pipe gallery concrete structure crack monitoring device as described in claim 1, characterized in that, The first mounting plate and the second mounting plate are arranged in parallel.

10. The pipe gallery concrete structure crack monitoring device as described in claim 1, characterized in that, The transmission assembly also includes a damping shaft, which is fitted onto the driven toothed roller shaft and rotatably connected to the second mounting plate.

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