A municipal bridge expansion joint inspection agency

Abstract

This invention discloses a municipal bridge expansion joint detection mechanism, belonging to the field of laser detection technology for expansion joints. The invention includes a main unit housing and heat dissipation holes at the corners of the main unit housing. A guide column is fixed to the side of the main unit housing, and a side width stop is provided on the side of the guide column. A reference rod fixed on the side width stop is inserted into the guide column, and a laser rangefinder is installed inside the guide column. The laser rangefinder optically detects the movement of the end of the reference rod. A movable wheel is connected to the middle of the side width stop via a rotating shaft, and a first cleaning component and a second cleaning component are respectively installed on the front and rear sides of the movable wheel. This municipal bridge expansion joint detection mechanism, through the laser rangefinder, facilitates accurate measurement of the expansion joint width, and allows for convenient measurement of the expansion joint width at fixed points or along its entire length. During the measurement process, it facilitates the cleaning of mud and sand adhering to the sidewalls of the expansion joint.

Description

Technical Field

[0001] This invention relates to the field of laser inspection technology for expansion joints, specifically to an inspection mechanism for expansion joints in municipal bridges. Background Technology

[0002] Bridge expansion joints are an important device designed to address the expansion and contraction of bridge structures caused by factors such as temperature changes and vehicle loads. Their main function is to ensure the integrity of the bridge structure and the safety of traffic. Bridge expansion joints are typically located between the ends of bridge beams, between the beam ends and abutments, and at the hinge points of the bridge. These locations are the most prone to expansion and contraction deformation in the bridge structure. Therefore, installing expansion joints can effectively absorb and buffer these deformations, maintaining the stability of the bridge structure. To facilitate the measurement of the width of bridge expansion joints, corresponding laser measuring instruments are usually used. Replacing manual reading with laser measurement not only improves the efficiency of inspection but also reduces errors.

[0003] For example, the announcement number is CN219607907U, the patent name is: a bridge expansion joint detection device, the announcement date is: 2023-08-29, which includes a guide rail, a push rod, a moving wheel and a scale. The push rod is fixed to the front side of the guide rail, and the moving wheel is installed on both the left and right sides of the guide rail. The scale is fixed to the left side of the guide rail, and the scale for detecting bridge expansion joints is slidably set inside the guide rail. The guide rail has evenly spaced graduation grooves inside.

[0004] The existing technology has the following technical problems: When the existing expansion joint detection device is used, it is measured by the reading of the scale. When there is a slight fluctuation, the error can be easily increased by visually observing the scale reading. At the same time, with the influence of external weather such as rain, some mud and sand can easily adhere to the side wall of the expansion joint, and the adhered mud and sand can also affect the expansion joint detection results.

[0005] Therefore, we propose a municipal bridge expansion joint inspection mechanism to address the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a municipal bridge expansion joint inspection mechanism to solve the problems mentioned in the background art. Currently available expansion joint inspection devices on the market measure the expansion joint by reading a scale. When there is a slight fluctuation, the scale reading is easily affected by visual observation, which can increase the error. At the same time, with the influence of external weather conditions such as rain, some mud and sand can easily adhere to the side wall of the expansion joint, which can also affect the inspection results.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a municipal bridge expansion joint detection mechanism, comprising a main unit and heat dissipation holes opened at the corners of the main unit. A guide column is fixed to the side of the main unit, and a side width block is provided on the side of the guide column. A reference rod fixed on the side width block is inserted into the interior of the guide column, and a laser rangefinder is installed inside the guide column. The laser rangefinder optically detects the movement of the end of the reference rod. A movable wheel is connected to the middle of the side width block through a rotating shaft, and a first cleaning component and a second cleaning component are respectively installed on the front and rear sides of the movable wheel. The first cleaning component and the second cleaning component can be adjusted according to the moving direction of the side width block.

[0008] Preferably, the reference rod on the side width block can slide on the guide post, and the interior of the guide post and the interior of the main unit are interconnected.

[0009] By adopting the above technical solution, the distance between the two laser rangefinders is D1. By measuring the distance D2 between the laser rangefinder and the reference rod, the distance between the expansion joints can be measured.

[0010] Preferably, the first cleaning component and the second cleaning component have the same structure, and the first cleaning component and the second cleaning component are symmetrically arranged about the central axis of the movable wheel, and a power magnet is circumferentially embedded in the middle of the movable wheel.

[0011] By adopting the above technical solution, the first and second cleaning components set on the side of the movable wheel can facilitate the cleaning of mud and sand adhering to the side wall of the expansion joint when measuring the entire moving line of the expansion joint.

[0012] Preferably, the first cleaning component and the second cleaning component include a cleaning brush head, and a central rod is installed in the middle of the cleaning brush head. A locking nut is installed at one end of the central rod extending out of the side wide block, and a baffle plate is fixed at one end of the central rod extending into the cleaning brush head. The baffle plate is located inside the receiving cavity, and a first convection port is provided on one side of the receiving cavity. A pressure rod is installed inside the first convection port, and the pressure rod is connected to the first convection port through a built-in spring. A connecting magnet is installed at one end of the pressure rod near the movable wheel, and a second convection port is provided on the side of the receiving cavity opposite to the first convection port. An impact rod is installed inside the second convection port, and the impact rod is connected to the second convection port through a return spring.

[0013] By adopting the above technical solution, the rotating center rod can be fixed by setting the locking nut.

[0014] Preferably, the center rod and the locking nut are threaded together, and the side of the locking nut facing the side block is roughened, and the outer wall of the end of the baffle plate fixed on the center rod is wrapped with a sealing ring.

[0015] By adopting the above technical solution, the contact friction between the locking nut and the side width block can be improved by using the rough surface of the lower surface of the locking nut.

[0016] Preferably, the baffle is rotatable inside the accommodating cavity, and the cross-section of the accommodating cavity is set to a circular structure.

[0017] By adopting the above technical solution, the first convection port or the second convection port can be selectively opened or closed by rotating the baffle.

[0018] Preferably, the pressure rod forms a seamless sliding connection structure with the first convection port through the sealing ring at its end, and the connecting magnetic block at the end of the pressure rod and the power magnetic block on the movable wheel have the same magnetism.

[0019] By adopting the above technical solution, when the moving wheel rotates and the connecting magnetic block on it and the end of the pressure rod approach each other, the pressure rod can be moved toward the inside of the first convection port by using the repulsive magnetic force.

[0020] Preferably, the end of the impact rod extending out of the second convection port is in contact with the side of the cleaning brush head in the initial state.

[0021] By adopting the above technical solution, the brush head can be used to strike the surface by reciprocating the impact rod.

[0022] Preferably, the cleaning brush head is equipped with an air supply pipe, one end of which is connected to the accommodating cavity, and the other end of which is inserted into the interior of the drainage pipe. A diversion pipe is installed in the middle of the drainage pipe, and the diversion pipe passes through the reference rod and is connected to the interior of the guide post.

[0023] By adopting the above technical solution, when airflow enters the inside of the drainage tube, a portion of the airflow can enter the inside of the guide column through the diversion tube. The airflow flowing inside the guide column can accelerate the heat dissipation efficiency of the laser rangefinder and the components inside the main unit.

[0024] Compared with the prior art, the beneficial effects of the present invention are: the municipal bridge expansion joint detection mechanism can conveniently and accurately measure the width of the expansion joint by setting a laser rangefinder, and can also conveniently measure the width of the expansion joint at fixed points or along the entire line. During the measurement process, it is convenient to clean the mud and sand attached to the side wall of the expansion joint.

[0025] 1. Equipped with a side width stop, the side width stop is placed in the expansion joint by pushing it into the guide column. After the side width stop is placed in the expansion joint, it rebounds through the auxiliary spring and presses against the expansion joint. The distance between the side width stop and the end of the reference rod is measured by a laser rangefinder, thereby realizing the fixed-point detection of the expansion joint width. At the same time, the handle in the middle of the main unit can be pushed to move the side width stop in the expansion joint. The movable wheels on the side width stop can reduce the movement resistance. By utilizing the expansion and contraction of the side width stop during movement, the uniformity of the width of the entire expansion joint can be detected.

[0026] 2. It is equipped with a first cleaning component and a second cleaning component. When the side width block moves, the first cleaning component or the second cleaning component contacts the side wall of the expansion joint, thereby cleaning the mud and sand attached to the side wall of the expansion joint and avoiding the mud and sand from affecting the width of the expansion joint.

[0027] 3. An impact rod is provided. When the movable wheel rotates, the change in distance between the power magnetic block and the connecting magnetic block causes the pressure rod to move into the interior of the first convection port. This forces the airflow in the internal cavity of one cleaning brush head to be expelled into the interior of the other cleaning brush head through the air supply pipe and the drainage pipe. Under the action of the airflow, the impact rod reciprocates. The reciprocating movement of the impact rod causes the cleaning brush head to collide with the brush head. The vibration generated by the collision of the cleaning brush head shakes off the mud and sand attached to the brush head. At the same time, some of the airflow in the drainage pipe also enters the interior of the guide column through the split pipe. The airflow inside the guide column can also carry away some of the heat from the laser rangefinder and the components inside the main unit. Attached Figure Description

[0028] Figure 1 This is a frontal perspective view of the present invention;

[0029] Figure 2 This is a schematic diagram of the reference rod and laser rangefinder structure of the present invention;

[0030] Figure 3 This is a schematic diagram of the gas delivery pipe and drainage pipe structure of the present invention;

[0031] Figure 4 This is a schematic diagram of the movable wheel and the power magnetic block structure of the present invention;

[0032] Figure 5 This is a schematic diagram of the cleaning brush head and center rod structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the structure of the baffle plate of the present invention blocking the first convection port;

[0034] Figure 7 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0035] Figure 8 This is a schematic diagram of the structure of the baffle plate blocking the second convection port according to the present invention.

[0036] In the diagram: 1. Main unit; 2. Heat dissipation vent; 3. Guide post; 4. Side width block; 5. Reference rod; 6. Auxiliary spring; 7. Laser rangefinder; 8. Movable wheel; 9. First cleaning component; 10. Second cleaning component; 11. Air supply pipe; 12. Drainage pipe; 13. Diverter pipe; 14. Power magnet; 15. Cleaning brush head; 16. Center rod; 17. Locking nut; 18. Baffle plate; 19. Receiving cavity; 20. First convection port; 21. Pressure rod; 22. Built-in spring; 23. Connecting magnet; 24. Second convection port; 25. Impact rod; 26. Return spring. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1: Please refer to Figures 1-3 Existing expansion joint detection devices measure expansion joints by reading a scale. However, even slight fluctuations in the scale reading can easily increase errors when viewed visually. Furthermore, rainy weather can cause mud and sand to adhere to the sidewalls of the expansion joint, affecting the detection results. To address this technical problem, this embodiment discloses the following technical content: a municipal bridge expansion joint detection mechanism, including a main unit 1 and heat dissipation holes 2 at the corners of the main unit 1. A guide post 3 is fixed to the side of the main unit 1, and a side width baffle is provided on the side of the guide post 3. Block 4, the reference rod 5 fixed on the side width block 4 is inserted into the interior of the guide post 3, and a laser rangefinder 7 is installed inside the guide post 3. The laser rangefinder 7 detects the movement of the end of the reference rod 5 through optical detection. The middle part of the side width block 4 is connected to a movable wheel 8 through a rotating shaft, and a first cleaning component 9 and a second cleaning component 10 are respectively installed on the front and rear sides of the movable wheel 8. The first cleaning component 9 and the second cleaning component 10 can be moved and adjusted according to the moving direction of the side width block 4. The reference rod 5 on the side width block 4 can slide on the guide post 3, and the interior of the guide post 3 and the interior of the main unit box 1 are interconnected.

[0039] When it is necessary to measure the bridge expansion joint, push the side width stop 4 towards the main unit 1. After the side width stop 4 moves, it is placed in the expansion joint. Then release the side width stop 4, and the side width stop 4 will reset under the action of the auxiliary spring 6. After resetting, the side width stop 4 presses against the expansion joint. The distance D2 between the laser rangefinder 7 and the end of the reference rod 5 on the side width stop 4 is detected. The sum of the distance D1 between the laser rangefinder 7 and the distance between the two laser rangefinders 7 can be used to measure the fixed-point width of the expansion joint. At the same time, the handle on the main unit 1 can be used to push the side width stop 4 to move it in the expansion joint. The movable wheel 8 on the side width stop 4 can reduce the resistance between the side width stop 4 and the expansion joint when moving. According to the direction of movement of the side width stop 4, adjust the first cleaning component 9 or the second cleaning component 10 on the side width stop 4 to... Figure 1 Taking the front direction of the center mark as an example, when the side width block 4 moves forward, the second cleaning component 10 moves inward to the side width block 4, so that the second cleaning component 10 is separated from the expansion joint. Since the first cleaning component 9 mainly plays a cleaning role when the side width block 4 moves forward, separating the second cleaning component 10 from the expansion joint can reduce the meaningless wear of the second cleaning component 10.

[0040] Example 2: The technical content disclosed in this example is a further improvement based on Example 1 described above. The following technical content is disclosed in this example: Figures 2-8As shown, the first cleaning component 9 and the second cleaning component 10 have the same structure and are symmetrically arranged about the central axis of the movable wheel 8. A power magnet 14 is circumferentially embedded in the center of the movable wheel 8. Both the first cleaning component 9 and the second cleaning component 10 include a cleaning brush head 15, and a central rod 16 is installed in the center of the cleaning brush head 15. A locking nut 17 is installed at one end of the central rod 16 extending out of the side width block 4, and the central rod 16 extends into the interior of the cleaning brush head 15. A baffle plate 18 is fixed at one end, located inside the accommodating cavity 19. A first convection port 20 is provided on one side of the accommodating cavity 19. A pressure rod 21 is installed inside the first convection port 20, and the pressure rod 21 is connected to the first convection port 20 by a built-in spring 22. A connecting magnet 23 is installed at the end of the pressure rod 21 near the movable wheel 8. A second convection port 24 is provided on the side of the accommodating cavity 19 opposite to the first convection port 20. An impact rod 25 is installed inside the second convection port 24. The impact rod 25 is connected to the second convection port 24 via the return spring 26. The center rod 16 and the locking nut 17 are threaded together, and the side of the locking nut 17 facing the side width block 4 is roughened. The outer wall of the end of the baffle plate 18 fixed on the center rod 16 is wrapped with a sealing ring. The baffle plate 18 can rotate inside the accommodating cavity 19, and the cross-section of the accommodating cavity 19 is circular. The pressure rod 21 forms a seamless sliding connection with the first convection port 20 through the sealing ring at its end. The connecting magnetic block 23 at the end of the pressure rod 21 and the power magnetic block 14 on the movable wheel 8 have the same magnetism. The end of the impact rod 25 extending out of the second convection port 24 is in contact with the side of the cleaning brush head 15 in the initial state. An air supply pipe 11 is installed on the cleaning brush head 15, and one end of the air supply pipe 11 is connected to the accommodating cavity 19. The other end of the air supply pipe 11 is inserted into the interior of the drainage pipe 12. A diversion pipe 13 is installed in the middle of the drainage pipe 12, and the diversion pipe 13 passes through the reference rod 5 and is connected to the interior of the guide post 3.

[0041] In this example, also using Figure 1Taking the front side of the center mark as an example, push the cleaning brush head 15 on the second cleaning component 10 towards the inside of the side width block 4. After the cleaning brush head 15 moves, the central axis of the pressure rod 21 on the first convection port 20 coincides with the axis of the movable wheel 8. At this time, the connecting magnetic block 23 at the end of the pressure rod 21 is closest to the power magnetic block 14 on the movable wheel 8. It should be noted that in the initial state, the first cleaning component 9 has not moved into the side width block 4, so the connecting magnetic block 23 at the end of the pressure rod 21 on the side of the first convection port 20 of the first cleaning component 9 is far from the power magnetic block 14 on the movable wheel 8 and will not generate a magnetic force. After that, rotate the central rod 16 on the first cleaning component 9, so that the rotation of the central rod 16 drives the partition The baffle 18 rotates synchronously, connecting the air supply pipe 11 and the second convection port 24. Rotating the central rod 16 on the second cleaning assembly 10 connects the air supply pipe 11 and the first convection port 20 via the baffle 18. The side-width block 4 moves, causing the movable wheel 8 to rotate. This rotation of the movable wheel 8 causes the power magnet 14 to rotate. When the power magnet 14 rotates and approaches the end-connecting magnet 23 of the pressure rod 21 on the second cleaning assembly 10, the repulsive magnetic force between them causes the pressure rod 21 to move towards the cleaning brush head 15 on the second cleaning assembly 10. After the pressure rod 21 moves, it accommodates the cleaning brush head 15 inside the second cleaning assembly 10. The airflow in cavity 19 is forced outward. Part of the forced-out airflow enters the diversion pipe 13 along the guide pipe 12. The airflow in the diversion pipe 13 flows into the interior of the main unit 1 after passing through the guide post 3, and finally exits outward through the heat dissipation hole 2 on the main unit 1. By utilizing the guide post 3 and the airflow inside the main unit 1, the heat dissipation effect of the internal components of the main unit 1 and the laser rangefinder 7 can be improved. At the same time, another part of the airflow flows through the guide pipe 12 to the air supply pipe 11 on the side of the first cleaning component 9. The airflow in the air supply pipe 11 enters the receiving cavity 19 inside the cleaning brush head 15 of the first cleaning component 9. At this time, the airflow in the receiving cavity 19 inside the cleaning brush head 15 of the first cleaning component 9 increases, thereby pushing the second convection port 24. The impact rod 25 on the first cleaning assembly 9 moves away from the cleaning brush head 15. As the movable wheel 8 rotates, causing its power magnet 14 and connecting magnet 23 to move away from each other, the pressure rod 21 on the second cleaning assembly 10 will reset under the action of the built-in spring 22. After the pressure rod 21 resets, the airflow in the receiving cavity 19 inside the cleaning brush head 15 on the first cleaning assembly 9 will flow back to the receiving cavity 19 inside the cleaning brush head 15 on the second cleaning assembly 10. At this time, the impact rod 25 on the first cleaning assembly 9 will reset and rebound under the action of the reset spring 26. This cycle repeats, so that the impact rod 25 can impact the cleaning brush head 15. The vibration generated by the impact on the cleaning brush head 15 can shake off the mud and sand attached to the bristles.

[0042] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A kind of municipal bridge expansion joint detection mechanism, including main case and the heat dissipation hole being opened in the corner of main case, the side of main case is fixed with guide column, and the side of guide column is provided with side width block, the reference bar fixed on side width block is inserted into the inside of guide column, and the inside of guide column is equipped with laser range finder, laser range finder detects the movement of reference bar end, it is characterized by: The middle part of the side wide block is connected with a movable wheel through a rotating shaft, and the front and rear sides of the movable wheel are respectively provided with a first cleaning assembly and a second cleaning assembly, and the first cleaning assembly or the second cleaning assembly can be adjusted to move to the inside of the side wide block according to the moving direction of the front side of the side wide block. The first cleaning assembly and the second cleaning assembly are the same in structure, and the first cleaning assembly and the second cleaning assembly are symmetrically arranged about the central axis of the movable wheel, and the middle part of the movable wheel is embedded with a power magnetic block in the circumferential direction; the first cleaning assembly and the second cleaning assembly comprise a cleaning brush head, the inside of the cleaning brush head is provided with a containing cavity, and the middle part of the cleaning brush head is provided with a central rod, one end of the central rod extending out of the side wide block is provided with a locking nut, and one end of the central rod extending into the inside of the cleaning brush head is fixedly provided with a blocking plate, the blocking plate is located in the inside of the containing cavity, the blocking plate can rotate in the inside of the containing cavity, the cross section of the containing cavity is provided with a circular structure, the end part of the blocking plate is wrapped with a sealing ring, one side of the containing cavity is provided with a first convection port, the inside of the first convection port is provided with a pressure receiving rod, the pressure receiving rod is connected with the first convection port through an embedded spring, one end of the pressure receiving rod close to the movable wheel is provided with a connecting magnetic block, the side of the containing cavity opposite to the first convection port is provided with a second convection port, the inside of the second convection port is provided with a striking rod, and the striking rod is connected with the second convection port through a reset spring; The pressure receiving rod and the first convection port form a seamless sliding connection structure through the sealing ring at the end of the pressure receiving rod, and the connecting magnetic block at the end of the pressure receiving rod and the power magnetic block on the movable wheel are the same in magnetism; The end of the striking rod extending out of the second convection port is in close contact with the side of the cleaning brush head in the initial state; The cleaning brush head is provided with a gas conveying pipe, one end of the gas conveying pipe is in communication with the containing cavity, the other end of the gas conveying pipe is inserted into the inside of a drainage pipe, the middle part of the drainage pipe is provided with a shunt pipe, and the shunt pipe is in communication with the inside of the guide column through the reference rod.

2. The municipal bridge expansion joint detection mechanism of claim 1, wherein: The reference rod on the side wide block can slide on the guide column, and the inside of the guide column is in communication with the inside of the main machine box.

3. The municipal bridge expansion joint detection mechanism of claim 1, wherein: The central rod and the locking nut are in threaded connection, and the side of the locking nut facing the side wide block is provided with a rough surface.

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