A tunnel crack observation marker device

Abstract

This invention belongs to the field of tunnel crack observation technology, specifically a tunnel crack observation target device, including a first adjusting rod, a second adjusting rod slidably connected inside the first adjusting rod, an outer shell fixed to the upper end of the second adjusting rod, and an adjusting mechanism provided outside the first adjusting rod. Inside the inner shell, a camera, a scale, a lighting lamp, an ultrasonic probe, and an electric push rod are installed and fixed, while inside the support frame, an ultrasonic flaw detector and a display screen are installed and fixed. When the detection work is no longer ongoing, the inner shell can be moved inside the outer shell, and two baffles can be closed to protect the internal structure of the inner shell. The lowered protective cover closes with the support frame, protecting the internal ultrasonic flaw detector and display screen, ensuring that these vulnerable parts are not accidentally damaged when not in use, and extending the service life of the observation target device.

Description

Technical Field

[0001] This invention relates to the field of tunnel crack observation technology, specifically a tunnel crack observation target device. Background Technology

[0002] As core structures of transportation infrastructure, urban underground spaces, and water conservancy projects, tunnels are subjected to complex geological environments and variable loads over long periods. The lining structure is highly susceptible to various cracking defects due to multiple factors, including surrounding rock pressure, construction disturbance, groundwater erosion, temperature stress, and vehicle vibration. The formation and continuous expansion of cracks directly weaken the load-bearing capacity and integrity of the tunnel lining structure, leading to secondary defects such as water leakage and lining spalling. In severe cases, it can even cause structural instability and collapse, threatening tunnel operational safety and the stability of the surrounding environment. Therefore, long-term, accurate, and routine monitoring of tunnel cracks is a crucial aspect of tunnel construction quality control, operational maintenance, and structural safety early warning.

[0003] Currently, tunnel crack monitoring mainly adopts a combination of manual inspection, instrument detection and observation point monitoring. Among them, crack observation point devices have become the most commonly used basic monitoring equipment on engineering sites due to their advantages such as low cost, convenient installation, no need for continuous power supply, and adaptability to the long-term harsh environment of tunnels. They are widely used in crack tracking and monitoring of highway tunnels, railway tunnels, subway tunnels and hydraulic tunnels. However, the existing observation devices still have the following technical problems in use: The main electrical components of the current observation target lack external protective structures, and even when not in use, their internal structures cannot be effectively protected, making them susceptible to accidental bumps and impacts that affect the lifespan of the observation target.

[0004] Therefore, a tunnel crack observation device is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a tunnel crack observation device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A tunnel crack observation marker device includes a first adjusting rod internally connected to a second adjusting rod, the upper end of which is fixed to an outer shell. The outer shell is a hollow structure with an open top. Two baffles are provided at the upper opening of the outer shell, and these baffles are designed to open and close left and right. An inner shell is housed within the hollow cavity of the outer shell, and an electric push rod is fixed within the outer shell. The upper end of the electric push rod is fixedly connected to the lower side of the inner shell. Under the action of the electric push rod, the inner shell extends out of the outer shell or retracts into it. A camera is fixed to the lower end of the inner wall, and a scale is fixed to the upper side of the camera. A light is fixed around the camera at the lower end of the inner wall of the inner housing, and an ultrasonic probe is fixed to the upper rear side of the inner wall of the inner housing. Support mechanisms are fixed on the outer walls of both the left and right sides of the outer housing to provide contact support to the tunnel wall during crack detection. An adjustment mechanism is provided on the first adjustment rod. A bracket is also fixed on the first adjustment rod. An ultrasonic flaw detector and a display screen are fixed to the side wall of the bracket. A moving mechanism is provided inside the bracket, and a protective cover is fixed to the right end of the bracket through the moving mechanism.

[0007] The adjusting mechanism has a housing, which is fixed to the outside of the first adjusting rod. A strip groove is provided on the left side of the second adjusting rod, and a rack is fixed inside the strip groove. A motor is fixed to the front side of the housing, and a rotating rod is fixed to the output end of the motor. A gear is fixed to the rear end of the rotating rod, and the gear meshes with the rack.

[0008] The upper side of the outer shell has an opening, and the upper side of the outer shell has a first cavity at both ends of the opening. A sliding plate is slidably connected inside the first cavity. A baffle is fixed on the side of the two sliding plates that are close to each other. The two baffles are slidably connected to the side wall of the first cavity. The upper side of the outer shell is threaded with symmetrical first threaded knobs, and the lower ends of the two first threaded knobs are engaged with the upper side of the sliding plate.

[0009] Each of the two baffles is equipped with a fixing mechanism; the fixing mechanism is located in the second cavity opened inside the outer shell; the moving block of the fixing mechanism is slidably connected to the inside of the second cavity, a first spring is fixed to the lower side of the moving block, the lower end of the first spring is fixedly connected to the lower end of the inner wall of the second cavity, a round-headed locking rod is fixed to the upper side of the moving block, the round-headed locking rod is slidably connected to the upper side of the second cavity, a round hole is opened on the lower side of the baffle, and the upper end of the round-headed locking rod is inserted into the round hole.

[0010] The inner shell is provided with limiting mechanisms on both the left and right sides. Each limiting mechanism includes a strip plate, which is fixedly connected to the inner wall of the outer shell. A strip groove is formed on the side wall of the strip plate. A limiting rod is fixed longitudinally inside the strip groove. A limiting plate is slidably connected to the outside of the limiting rod. One side of the limiting plate is slidably connected to the inner wall of the strip groove, and the other side of the limiting plate is fixedly connected to the side wall of the inner shell.

[0011] Support mechanisms are fixed to the left and right sides of the outer casing. Each support mechanism includes a U-shaped plate, which is fixedly connected to the side wall of the outer casing. A rotating plate is rotatably connected to the inside of the U-shaped plate via a pivot pin. A second threaded knob is threaded to the front and rear sides of the U-shaped plate. A moving rod is slidably connected to the side wall of the rotating plate. A support block is fixed to the upper end of the moving rod, and a limit seat is fixed to the lower end of the moving rod. A second spring is sleeved on the outside of the moving rod. The lower end of the second spring is fixedly connected to the upper side of the limit seat, and the upper end of the second spring is fixedly connected to the lower side of the rotating plate.

[0012] An energy storage battery is fixed inside the lower part of the outer casing, and a charging port is provided on the left end of the energy storage battery.

[0013] The moving mechanism includes a lifting block. A moving cavity is opened on the left side of the bracket. The lifting block is slidably connected inside the moving cavity. A lifting rod is fixed on the upper side of the lifting block. The lifting rod is slidably connected to the upper side of the moving cavity. The other end of the lifting rod is fixedly connected to the upper side of the protective cover. A third threaded knob is threadedly connected to the upper front side of the bracket. The rear end of the third threaded knob is engaged with the front end of the lifting rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This application includes a camera, scale, lighting, ultrasonic probe, and electric push rod installed and fixed inside the inner housing, and an ultrasonic flaw detector and display screen installed and fixed inside the bracket. When the detection work is no longer ongoing, the inner housing can be moved inside the outer housing, and the two baffles can be closed to protect the internal structure of the inner housing. The protective cover is moved down and closed with the bracket to protect the ultrasonic flaw detector and display screen inside, ensuring that these vulnerable parts will not be accidentally damaged when not in use, thus extending the service life of the observation device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the first and second adjusting rods; Figure 3 This is a sectional view of the outer shell; Figure 4 for Figure 1 Enlarged view of section A; Figure 5 for Figure 3 Enlarged view of section B; Figure 6 This is a cross-sectional view of the protective cover.

[0016] In the diagram: 1 First adjusting rod, 2 Second adjusting rod, 3 Outer shell, 4 Slide plate, 5 Baffle, 6 Inner shell, 7 Camera, 8 Scale, 9 Lighting lamp, 10 Ultrasonic probe, 11 Electric push rod, 12 Bracket, 13 Ultrasonic flaw detector, 14 Display screen, 15 Protective cover, 16 Chassis, 17 Rack and pinion, 18 Motor, 19 Rotating rod, 20 Gear, 21 Moving block, 22 First spring, 23 Round head locking rod, 24 Strip plate, 25 Limiting rod, 26 Limiting plate, 27 U-shaped plate, 28 Rotating plate, 29 Moving rod, 30 Support block, 31 Limiting seat, 32 Second spring, 33 Energy storage battery, 34 Lifting block, 35 Lifting rod. Detailed Implementation

[0017] 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.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limitations on this invention. Example

[0019] Please see Figure 1-6 The present invention provides a technical solution: A tunnel crack observation device includes a first adjusting rod 1, a second adjusting rod 2 slidably connected inside the first adjusting rod 1, an outer shell 3 fixed to the upper end of the second adjusting rod 2, and an adjusting mechanism provided outside the first adjusting rod 1. The adjusting mechanism can adjust the extension and retraction length of the second adjusting rod 2 inside the first adjusting rod 1 to meet the needs of crack detection at different locations inside the tunnel. An opening is provided on the upper side of the outer shell 3. A first cavity is provided at both ends of the opening on the upper side of the outer shell 3. A sliding plate 4 is slidably connected inside the first cavity. A baffle 5 is fixed on the side of the two sliding plates 4 that are close to each other. The two baffles 5 are slidably connected to the side wall of the first cavity. When the observation device is not needed, the two baffles 5 need to be moved to protect the upper end of the inner shell and tightened by the first threaded knob to protect the internal structure of the inner shell 6. The outer shell 3 has a second cavity on both the left and right sides. The second cavity is equipped with a fixing mechanism. The left and right ends of the inner wall of the outer shell 3 are fixed with a limit mechanism. The inner shell 6 is fixed between the two limit mechanisms. The lower end of the inner wall of the inner shell 6 is fixed with a camera 7. The upper side of the camera 7 is fixed with a scale 8. The lower end of the inner wall of the inner shell 6 is fixed with a light 9 around the camera 7. The upper end of the rear side of the inner wall of the inner shell 6 is fixed with an ultrasonic probe 10. The lower end of the inner wall of the outer shell 3 is fixed with an electric push rod 11. The upper end of the electric push rod 11 is fixedly connected to the lower side of the inner shell 6. A bracket 12 is fixed to the lower right end of the first adjusting rod 1. An ultrasonic flaw detector 13 and a display screen 14 are fixed to the side wall of the bracket 12. A moving mechanism is provided inside the bracket 12. A protective cover 15 is fixed to the right end of the bracket 12 through the moving mechanism. The protective cover 15 is closed with the bracket 12 to protect the ultrasonic flaw detector 13 and the display screen 14 fixed to the side wall of the bracket 12.

[0020] The adjustment mechanism includes a housing 16, which is fixed to the outside of the first adjustment rod 1. A strip-shaped groove is provided on the left side of the second adjustment rod 2, and a rack 17 is fixed inside the strip-shaped groove. A motor 18 is fixed to the front side of the housing 16. A rotating rod 19 is fixed to the output end of the motor 18, and a gear 20 is fixed to the rear end of the rotating rod 19. The gear 20 meshes with the rack 17. The motor 18 is a forward and reverse motor. The motor 18 drives the rotating rod 19 at the output end to rotate, which drives the gear 20 to rotate. The gear 20 drives the meshing rack 17 to move, thereby finally driving the second adjustment rod 2 to move.

[0021] The upper side of the outer casing 3 is threaded with symmetrical first threaded knobs, and the lower ends of the two first threaded knobs are engaged with the upper side of the slide plate 4.

[0022] The fixing mechanism includes a movable block 21, which is slidably connected inside the second cavity. A first spring 22 is fixed to the lower side of the movable block 21, and the lower end of the first spring 22 is fixedly connected to the lower end of the inner wall of the second cavity. A round-headed locking rod 23 is fixed to the upper side of the movable block 21, and the round-headed locking rod 23 is slidably connected to the upper side of the second cavity. A round hole is opened on the lower side of the baffle 5, and the upper end of the round-headed locking rod 23 is inserted into the round hole. When the two baffles 5 move into the first cavity, the movable block 21 on the side wall is moved by the first spring 22, and the movable block 21 moves the round-headed locking rod 23 on the side wall. The round-headed locking rod 23 is inserted into the round hole to limit and fix the baffle 5.

[0023] The limiting mechanism includes a strip plate 24, which is fixedly connected to the inner wall of the outer shell 3. A strip groove is provided on the side wall of the strip plate 24. A limiting rod 25 is fixed longitudinally inside the strip groove. A limiting plate 26 is slidably connected to the outside of the limiting rod 25. One side of the limiting plate 26 is slidably connected to the inner wall of the strip groove, and the other side of the limiting plate 26 is fixedly connected to the side wall of the inner shell 6. The limiting mechanism can ensure that the inner shell can move stably up and down under the extension and retraction of the electric push rod 11.

[0024] Support mechanisms are fixed on the left and right sides of the outer shell 3. The support mechanisms include a U-shaped plate 27, which is fixedly connected to the side wall of the outer shell 3. A rotating plate 28 is rotatably connected inside the U-shaped plate 27 via a shaft pin. A second threaded knob is threadedly connected to the front and rear sides of the U-shaped plate 27. A moving rod 29 is slidably connected to the side wall of the rotating plate 28. A support block 30 is fixed to the upper end of the moving rod 29. A limit seat 31 is fixed to the lower end of the moving rod 29. A second spring 32 is sleeved on the outside of the moving rod 29. The lower end of the second spring 32 is fixedly connected to the upper side of the limit seat 31, and the upper end of the second spring 32 is fixedly connected to the lower side of the rotating plate 28.

[0025] An energy storage battery 33 is fixed inside the lower part of the outer casing 3. A charging port is provided on the left end of the energy storage battery 33. The energy storage battery 33 is electrically connected to all the electrical structures inside the device to provide power. When the battery is out of power, it can be charged through the charging port.

[0026] The moving mechanism includes a lifting block 34. A moving cavity is provided on the left side of the bracket 12. The lifting block 34 is slidably connected inside the moving cavity. A lifting rod 35 is fixed on the upper side of the lifting block 34. The lifting rod 35 is slidably connected to the upper side of the moving cavity. The other end of the lifting rod 35 is fixedly connected to the upper side of the protective cover 15. A third threaded knob is threadedly connected to the upper front side of the bracket 12. The rear end of the third threaded knob is engaged with the front end of the lifting rod 35. The moving mechanism is used to ensure the connection between the protective cover 15 and the bracket 12, and to facilitate the upward movement of the protective cover 15 when using the ultrasonic flaw detector 13 and the display screen 14. After use, the protective cover 15 is moved downward to close the connection between the protective cover 15 and the bracket 12.

[0027] Working principle: In use, hold the first adjusting rod 1 by hand and adjust the second adjusting rod 2 inside the first adjusting rod 1 through the adjusting mechanism to change the length to be used; Loosen the two first threaded knobs to limit the baffle 5, move the two baffles 5 to both ends, and after the two baffles 5 are in place, limit and fix the two baffles 5 by the fixing mechanism. Start the electric push rod 11, and the electric push rod 11 drives the upper inner shell 6 to move upward until it moves to the outside of the outer shell 3. Rotate the rotating plate 28 inside the U-shaped plate 27 on the left and right sides of the outer shell 3, so that the rotating plate 28 drives the moving rod 29, support block 30, limit seat 31 and second spring 32 of the side wall to rotate. The support block 30 is used to contact and support the tunnel wall during the crack detection process. The camera 7, lighting 9, ultrasonic probe 10, ultrasonic flaw detector 13, and display screen 14 are activated. The ultrasonic probe 10 is used to detect cracks inside the tunnel, and the detection results are transmitted to the ultrasonic flaw detector 13. Finally, the results are transmitted to the display screen 14. After the flaw detection is completed, the inner housing 6 and the internal electrical components are moved into the outer housing 3 by retracting the electric push rod 11. The two baffles 5 are pulled forcefully to move the two baffles 5 to the upper end of the inner housing 6, and the first threaded knob is tightened again to fix the baffles 5. Move the protective cover 15 so that it engages with the upper end of the bracket 12. Tighten the third threaded knob to fix the moving rod 29, ensuring that the protective cover 15 and the bracket 12 are closed, thus protecting the internal ultrasonic flaw detector 13 and display screen 14.

[0028] It should be noted that the electrical components mentioned in this invention have had their wiring harnesses combed according to actual conditions during manufacturing, so that the wiring harnesses will not be tangled or affect the operation. All standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The control method of this invention is through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. It should be noted that the electrical components mentioned in this invention have been sorted according to the actual situation during manufacturing, so as not to cause the wire harness to become tangled or affect the operation. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0029] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to 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 this invention.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. 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 basic characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel crack observation marker device, wherein a second adjusting rod is slidably connected inside a first adjusting rod of the tunnel crack observation marker device, and an outer shell is fixed to the upper end of the second adjusting rod; the outer shell is a cavity structure with an open upper end; two baffles are provided at the upper opening of the outer shell, and the two baffles are designed to open and close left and right; an inner shell is provided inside the cavity of the outer shell, and an electric push rod is fixed inside the outer shell, the upper end of the electric push rod is fixedly connected to the lower side of the inner shell, and the inner shell extends out of the outer shell or retracts into the outer shell under the action of the electric push rod; the inner shell... A camera is fixed to the lower end of the inner wall of the housing, and a scale is fixed to the upper side of the camera. A light is fixed around the camera at the lower end of the inner wall of the housing, and an ultrasonic probe is fixed to the upper rear side of the inner wall of the housing. Support mechanisms are fixed on the outer walls of both the left and right sides of the housing to provide contact support for the tunnel wall during crack detection. An adjustment mechanism is provided on the first adjustment rod. A bracket is also fixed on the first adjustment rod. An ultrasonic flaw detector and a display screen are fixed to the side wall of the bracket. A moving mechanism is provided inside the bracket, and a protective cover is fixed to the right end of the bracket through the moving mechanism.

2. The tunnel crack observation marker according to claim 1, characterized in that: The adjusting mechanism has a housing, which is fixed to the outside of the first adjusting rod. A strip groove is provided on the left side of the second adjusting rod, and a rack is fixed inside the strip groove. A motor is fixed to the front side of the housing, and a rotating rod is fixed to the output end of the motor. A gear is fixed to the rear end of the rotating rod, and the gear meshes with the rack.

3. The tunnel crack observation marker device according to claim 1, characterized in that: The upper side of the outer shell has an opening, and the upper side of the outer shell has a first cavity at both ends of the opening. A sliding plate is slidably connected inside the first cavity. A baffle is fixed on the side of the two sliding plates that are close to each other. The two baffles are slidably connected to the side wall of the first cavity. The upper side of the outer shell is threaded with symmetrical first threaded knobs, and the lower ends of the two first threaded knobs are engaged with the upper side of the sliding plate.

4. The tunnel crack observation marker according to claim 1, characterized in that: Each of the two baffles is equipped with a fixing mechanism; the fixing mechanism is located in the second cavity opened inside the outer shell; the moving block of the fixing mechanism is slidably connected to the inside of the second cavity, a first spring is fixed to the lower side of the moving block, the lower end of the first spring is fixedly connected to the lower end of the inner wall of the second cavity, a round-headed locking rod is fixed to the upper side of the moving block, the round-headed locking rod is slidably connected to the upper side of the second cavity, a round hole is opened on the lower side of the baffle, and the upper end of the round-headed locking rod is inserted into the round hole.

5. A tunnel crack observation marker according to claim 1, characterized in that: The inner shell is provided with limiting mechanisms on both the left and right sides. Each limiting mechanism includes a strip plate, which is fixedly connected to the inner wall of the outer shell. A strip groove is formed on the side wall of the strip plate. A limiting rod is fixed longitudinally inside the strip groove. A limiting plate is slidably connected to the outside of the limiting rod. One side of the limiting plate is slidably connected to the inner wall of the strip groove, and the other side of the limiting plate is fixedly connected to the side wall of the inner shell.

6. The tunnel crack observation marker according to claim 1, characterized in that: Support mechanisms are fixed to the left and right sides of the outer casing. Each support mechanism includes a U-shaped plate, which is fixedly connected to the side wall of the outer casing. A rotating plate is rotatably connected to the inside of the U-shaped plate via a pivot pin. A second threaded knob is threaded to the front and rear sides of the U-shaped plate. A moving rod is slidably connected to the side wall of the rotating plate. A support block is fixed to the upper end of the moving rod, and a limit seat is fixed to the lower end of the moving rod. A second spring is sleeved on the outside of the moving rod. The lower end of the second spring is fixedly connected to the upper side of the limit seat, and the upper end of the second spring is fixedly connected to the lower side of the rotating plate.

7. The tunnel crack observation marker according to claim 1, characterized in that: An energy storage battery is fixed inside the lower part of the outer casing, and a charging port is provided on the left end of the energy storage battery.

8. A tunnel crack observation marker according to claim 1, characterized in that: The moving mechanism includes a lifting block. A moving cavity is opened on the left side of the bracket. The lifting block is slidably connected inside the moving cavity. A lifting rod is fixed on the upper side of the lifting block. The lifting rod is slidably connected to the upper side of the moving cavity. The other end of the lifting rod is fixedly connected to the upper side of the protective cover. A third threaded knob is threadedly connected to the upper front side of the bracket. The rear end of the third threaded knob is engaged with the front end of the lifting rod.

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