Core drilling device for tunnel inverted arch thickness detection

Abstract

The utility model relates to the technical field of tunnel thickness detection, and discloses a core drilling device for tunnel inverted arch thickness detection, which comprises a drilling frame, a connecting block, a connecting strip and a fixing strip, a support frame is inserted into the top of the drilling frame, a protective cylinder is arranged in the drilling frame, a servo motor is accommodated in the protective cylinder, and an output shaft of the servo motor is connected with a drilling core. Lifting is controlled through a hydraulic cylinder and a connecting plate, the bottom of the drilling frame is connected with a fixing strip through a connecting block, a connecting strip, a supporting rod and a sliding hinge lug, the fixing hinge lugs at the two ends of the fixing strip are used for overall fixing, and the sliding hinge lug achieves flexible positioning and fixing through a sliding plate, a sliding groove and a fixing rod. The servo motor drives the drill core to rotate for drilling, the protective cylinder protects the servo motor from being interfered by chippings, after drilling is completed, the hydraulic cylinder shrinks to take out the core sample, positioning is accurate, the structure is stable, the device can adapt to different working conditions, and the efficiency and accuracy of tunnel inverted arch thickness detection are effectively improved.

Description

A core drilling device for detecting the thickness of tunnel invert arches Technical Field

[0001] This utility model relates to the field of tunnel thickness detection technology, specifically a core drilling device for detecting the thickness of a tunnel invert arch. Background Technology

[0002] As a crucial component of the tunnel structure, the tunnel invert is a key structural layer at the tunnel bottom that bears the pressure of the surrounding rock and the load of the road surface. Its construction quality directly affects the overall stability and service life of the tunnel. During tunnel construction and operation, factors such as geological conditions, construction technology, and long-term load can affect the invert, which may lead to quality problems such as insufficient thickness and substandard strength. Therefore, regularly and accurately measuring the thickness of the tunnel invert is a necessary means to ensure the safety of the tunnel structure and prevent defects. By obtaining core samples of the invert and measuring and analyzing their thickness, potential problems can be identified in a timely manner, providing a scientific basis for tunnel maintenance and reinforcement.

[0003] Currently, traditional core drilling devices for detecting the thickness of tunnel inverts have shortcomings in practical applications. On the one hand, the structural design of some devices is not flexible enough and it is difficult to adapt to the detection needs under different tunnel conditions. In complex geological environments or narrow spaces, the positioning and fixing of the device is cumbersome, resulting in low detection efficiency. On the other hand, the existing devices have poor protective performance. Debris and dust generated during drilling can easily enter the core power components, accelerating equipment wear. This not only affects the service life of the device but may also lead to a decrease in drilling accuracy due to component failure, resulting in deviations in the detection results. This makes it impossible to provide accurate data support for tunnel maintenance, thereby increasing tunnel safety risks and maintenance costs. Therefore, we propose a core drilling device for detecting the thickness of tunnel inverts. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a core drilling device for detecting the thickness of tunnel invert arches, thus solving the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution: a core drilling device for detecting the thickness of a tunnel invert, comprising a drilling frame, connecting blocks, connecting strips, and fixing strips. The drilling frame has a protective cylinder inside, and a servo motor is installed inside the protective cylinder. A support frame is inserted into the top of the drilling frame, and a hydraulic cylinder is installed inside the support frame. A connecting plate is fixedly connected to the piston shaft of the hydraulic cylinder, and the connecting plate is fixedly connected to the servo motor. A core drill is fixedly connected to the output shaft of the servo motor. Connecting blocks are installed on both sides of the bottom of the drilling frame, and connecting strips are installed at the bottom of the connecting blocks with nuts. Support rods are hinged to both sides of the bottom of the connecting strips, and the other end of the support rods is hinged to a sliding hinge. The bottom of the sliding hinge is slidably installed inside the fixing strip and is fixed in place with the fixing rod.

[0008] Preferably, the top two sides of the drilling frame are provided with symmetrically distributed connecting cylinders, the bottom of the support frame is provided with connecting columns, the connecting columns are inserted into the connecting cylinders for fixation, the bottom of the support frame is fixedly connected with a hydraulic cylinder, and the bottom of the piston shaft of the hydraulic cylinder is fixedly connected with a connecting plate, which is in the shape of an annulus.

[0009] Preferably, a cylindrical protective cylinder is fixed inside the drilling frame, and a support ring is provided inside the protective cylinder. A servo motor is provided at the top of the support ring, and the end of the servo motor is fixedly connected to the connecting plate. The output shaft of the servo motor passes through the support ring and is fixedly connected to the drill core.

[0010] Preferably, the bottom corners of the drilling frame are bolted with connecting blocks, the bottom of the connecting blocks are provided with symmetrically distributed threaded connecting rods, and the connecting rods are provided with symmetrically arranged connecting holes. The threaded connecting rods are inserted into the connecting holes and fixedly connected with nuts.

[0011] Preferably, the bottom sides of the connecting strip are provided with single hinge ears, and the two ends of the support rod are fixed with double hinge ears. The double hinge ears at one end of the support rod are hinged to the single hinge ears at the bottom of the connecting strip through a pivot, and the other end of the support rod is hinged to the top of the sliding hinge ear through a pivot.

[0012] Preferably, the bottom of the sliding hinge is provided with a slide plate, the top of the fixing strip is provided with a groove, the slide plate is slidably installed in the groove, the top of the fixing strip is provided with a plurality of equidistant limiting holes, the slide plate is provided with fixing holes, the fixing rod passes through the fixing holes through the slide plate, the end of the fixing rod cooperates with the limiting holes for limiting and fixing, and the two ends of the fixing strip are fixed with fixing hinges.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a core drilling device for detecting the thickness of tunnel invert arches, which has the following advantages:

[0015] 1. This core drilling device for detecting the thickness of the tunnel invert is flexible, efficient, and precise in positioning. It can be quickly fixed to the detection position through the fixing lugs at both ends of the fixing bar. The sliding lugs cooperate with the sliding grooves of the fixing bar, and combined with the limiting of the fixing rod, the device position can be flexibly adjusted and precisely positioned according to actual needs. At the same time, the connecting bar, support rod, and sliding lugs form a stable support structure. Combined with the connection of the connecting block and the drilling frame, it ensures that the device is stable and does not shake during the drilling process, effectively improving the detection efficiency and accuracy.

[0016] 2. The core drilling device for tunnel invert thickness detection has a reliable structure and comprehensive protection. The hydraulic cylinder, connecting plate, servo motor, and core work together to stably control the lifting and lowering of the core and the drilling force, ensuring smooth core drilling operations. In addition, the cylindrical protective sleeve provides all-round protection for the servo motor, effectively isolating debris and dust generated during drilling, avoiding damage to the motor, and extending the service life of the equipment. Moreover, the components are tightly connected and the structure is reasonable, providing a reliable guarantee for tunnel invert thickness detection. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the structure of this utility model;

[0018] Figure 2 is a cross-sectional view of the structure of this utility model;

[0019] Figure 3 is a schematic diagram of the structure of this utility model;

[0020] Figure 4 is a schematic diagram of the drilling frame structure of this utility model.

[0021] In the diagram: 1. Support frame; 2. Hydraulic cylinder; 3. Connecting plate; 4. Servo motor; 5. Drill core; 6. Drilling frame; 7. Protective sleeve; 8. Connecting block; 9. Connecting strip; 10. Support rod; 11. Sliding hinge; 12. Fixing strip; 13. Fixing rod; 14. Threaded connecting rod; 15. Connecting hole; 16. Slide plate; 17. Slide groove; 18. Fixed hinge; 19. Connecting sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please refer to Figures 1-4. A core drilling device for detecting the thickness of a tunnel invert includes a drilling frame 6, connecting blocks 8, connecting strips 9, and fixing strips 12. The drilling frame 6 has a protective cylinder 7 inside, and a servo motor 4 is installed inside the protective cylinder 7. A support frame 1 is inserted into the top of the drilling frame 6. A hydraulic cylinder 2 is installed inside the support frame 1. A connecting plate 3 is fixedly connected to the piston shaft of the hydraulic cylinder 2. The connecting plate 3 is fixedly connected to the servo motor 4. The output shaft of the servo motor 4 is fixedly connected to the core drill 5. Connecting blocks 8 are installed on both sides of the bottom of the drilling frame 6. Connecting strips 9 are installed at the bottom of the connecting blocks 8 with nuts. Support rods 10 are hinged on both sides of the bottom of the connecting strips 9. The other end of the support rods 10 is hinged to a sliding hinge lug 11. The bottom of the sliding hinge lug 11 is slidably installed inside the fixing strip 12 and is fixed in place with the fixing rod 13.

[0024] Furthermore, the top two sides of the drilling frame 6 are provided with symmetrically distributed connecting cylinders 19, and the bottom of the support frame 1 is provided with connecting columns. The connecting columns are inserted into the connecting cylinders 19 for fixation. The bottom of the support frame 1 is fixedly connected to a hydraulic cylinder 2, and the bottom of the piston shaft of the hydraulic cylinder 2 is fixedly connected to a connecting plate 3. The connecting plate 3 is in the shape of a ring, which realizes a stable connection between the drilling frame 6 and the support frame 1, provides a driving basis for the lifting and lowering of the drill core 5, and ensures stable power transmission.

[0025] Furthermore, a cylindrical protective cylinder 7 is fixed inside the drilling frame 6. A support ring is provided inside the protective cylinder 7. A servo motor 4 is installed at the top of the support ring. The end of the servo motor 4 is fixedly connected to the connecting plate 3. The output shaft of the servo motor 4 passes through the support ring and is fixedly connected to the drill core 5. This protects the servo motor 4 from external interference and ensures that the drill core 5 can rotate stably under the drive of the servo motor 4.

[0026] Furthermore, connecting blocks 8 are bolted to the bottom corners of the drilling frame 6. The bottom of the connecting block 8 is provided with symmetrically distributed threaded connecting rods 14. The connecting strip 9 is provided with symmetrically distributed connecting holes 15. The threaded connecting rods 14 are inserted into the connecting holes 15 and fixed with nuts to achieve a reliable connection between the drilling frame 6 and the supporting structure below, thereby enhancing the overall structural stability.

[0027] Furthermore, the bottom sides of the connecting strip 9 are provided with single hinge ears, and the two ends of the support rod 10 are fixed with double hinge ears. The double hinge ears at one end of the support rod 10 are hinged to the single hinge ears at the bottom of the connecting strip 9 through a rotating shaft, and the other end of the support rod 10 is hinged to the top of the sliding hinge ear 11 through a rotating shaft, thus constructing a flexibly adjustable support structure, which makes it easy for the device to adjust its posture according to the detection requirements and improves the device's ability to adapt to different detection environments.

[0028] Furthermore, the bottom of the sliding hinge 11 is provided with a slide plate 16, and the top of the fixing strip 12 is provided with a groove 17. The slide plate 16 is slidably installed inside the groove 17. The top of the fixing strip 12 is provided with multiple equidistant limiting holes. The slide plate 16 is provided with fixing holes. The fixing rod 13 passes through the fixing holes and passes through the slide plate 16. The end of the fixing rod 13 cooperates with the limiting holes for limiting and fixing. The two ends of the fixing strip 12 are fixed with fixing hinges 18, so as to realize the flexible positioning and firm fixation of the sliding hinge 11 on the fixing strip 12. Combined with the fixing hinges 18, the overall positioning and installation of the device is completed, ensuring that the device position is accurate and stable during the detection operation.

[0029] Structural Description:

[0030] Support frame 1: Support frame 1 is the support structure at the top of the core drilling device. It has a connecting column at the bottom and is fixed by plugging it into the connecting cylinder 19 at the top of the drilling frame 6, providing an installation base for components such as hydraulic cylinder 2.

[0031] Hydraulic cylinder 2: Hydraulic cylinder 2 is installed inside the support frame 1, and its piston shaft is fixedly connected to the connecting plate 3. Through telescopic movement, it drives the connecting plate 3 and connected components to realize the lifting and lowering movement of the drill core 5.

[0032] Connecting plate 3: The connecting plate 3 is in the shape of a ring. One end is connected to the piston shaft of the hydraulic cylinder 2, and the other end is fixed to the servo motor 4, which plays a role in connecting and transmitting power to ensure that the power is stably transmitted to the servo motor 4.

[0033] Servo motor 4: The servo motor 4 is located inside the protective cylinder 7 and is connected to the hydraulic cylinder 2 through the connecting plate 3. Its output shaft is connected to the drill core 5 to provide power for the rotary drilling operation of the drill core 5.

[0034] Core drill 5: Core drill 5 is fixed on the output shaft of servo motor 4 and is the component that directly drills the tunnel invert. Driven by servo motor 4, it achieves rotary cutting to obtain the core sample required for testing.

[0035] Drilling frame 6: Drilling frame 6 is the main load-bearing structure of the device. It has a protective cylinder 7 inside, a support frame 1 inserted at the top, and a connecting block 8 connected at the bottom for installing and fixing the core components.

[0036] Protective cylinder 7: The protective cylinder 7 is cylindrical and fixed inside the drilling frame 6. It is used to house the servo motor 4, effectively isolate the debris and dust generated during drilling, and protect the servo motor 4 to operate normally.

[0037] Connecting block 8: The connecting block 8 is installed on both sides of the bottom of the drilling frame 6 by bolts. The bottom end is provided with a threaded connecting rod 14 for connecting with the connecting strip 9, so as to connect the drilling frame 6 with the support structure below.

[0038] Connecting bar 9: Connecting bar 9 is connected to connecting block 8 by thread. It has single hinge lugs on both sides of the bottom for hinged support rod 10. It is an important connecting and transition component between drilling frame 6 and support structure.

[0039] Support rod 10: The support rod 10 has double hinges at both ends, which are respectively hinged to the bottom single hinge of the connecting strip 9 and the top of the sliding hinge 11 to form an adjustable support structure and enhance the adaptability of the device;

[0040] Sliding hinge 11: The bottom of the sliding hinge 11 is provided with a sliding plate 16, which can slide in the groove 17 of the fixed bar 12 and is hinged to the support rod 10 to realize the adjustment of the device position and flexible changes in posture;

[0041] Fixed strip 12: Fixed hinge lugs 18 are provided at both ends of the fixed strip 12 for overall fixation. The inside has a sliding groove 17 and a limiting hole, which, together with the sliding plate 16 and the fixed rod 13, realizes the positioning and fixation of the sliding hinge lug 11.

[0042] Fixed rod 13: The fixed rod 13 passes through the fixed hole on the slide plate 16 and cooperates with the limiting hole in the fixed strip 12 to limit and fix the sliding hinge 11, ensuring that the detection position of the device is accurate and stable;

[0043] Threaded connecting rod 14: The threaded connecting rod 14 is located at the bottom of the connecting block 8 and is used with the connecting hole 15 on the connecting strip 9 to achieve a firm connection between the connecting block 8 and the connecting strip 9;

[0044] Connection hole 15: Connection hole 15 is provided on the connecting strip 9 and corresponds to the threaded connecting rod 14 of the connecting block 8. The connection between the connecting strip 9 and the connecting block 8 is achieved by the use of a nut.

[0045] Slide plate 16: Slide plate 16 is located at the bottom of sliding hinge lug 11 and slides in conjunction with the groove 17 of fixing strip 12, so that sliding hinge lug 11 can move flexibly and facilitate device position adjustment;

[0046] Slide 17: Slide 17 is formed inside the top of the fixed strip 12 and cooperates with the slide plate 16 to provide a sliding track for the sliding hinge 11, so as to realize flexible adjustment of the device position;

[0047] Fixed hinge lug 18: Fixed hinge lug 18 is located at both ends of fixed strip 12 and is used to fix the entire device at the tunnel invert arch detection position to ensure stable detection operation;

[0048] Connecting cylinder 19: The connecting cylinder 19 is symmetrically distributed on both sides of the top of the drilling frame 6, and is inserted into the connecting column at the bottom of the support frame 1 to achieve a stable connection between the drilling frame 6 and the support frame 1.

[0049] Working principle: During the device preparation stage, the entire device is fixed to the tunnel invert detection position by the fixing lugs 18 at both ends of the fixing strip 12. The sliding plate 16 at the bottom of the sliding lug 11 can slide in the sliding groove 17 inside the top of the fixing strip 12. After adjusting the position according to the actual detection requirements, the fixing rod 13 is passed through the fixing hole on the sliding plate 16 and cooperates with the equidistantly distributed limiting holes inside the top of the fixing strip 12 to realize the limiting and fixing of the sliding lug 11. Subsequently, the connecting strip 9 is hinged to the double lug at one end of the support rod 10 through the single hinge lugs on both sides of the bottom via a rotating shaft. The double hinge lugs at the other end of the support rod 10 and the double hinge lugs at the top of the sliding hinge lug 11 are also hinged by a pivot to form a stable support structure. The connecting block 8 is installed at the bottom corners of the drilling frame 6 by bolts. The threaded connecting rods 14 symmetrically distributed at their bottom ends are inserted into the connecting holes 15 of the connecting strip 9 and tightened with nuts to complete the stable connection between the drilling frame 6 and the support structure below. The connecting column at the bottom of the support frame 1 is inserted into the connecting cylinders 19 symmetrically distributed on the top sides of the drilling frame 6 for fixed installation. The hydraulic cylinder 2 fixed at the bottom inside the support frame 1 has its piston shaft at the bottom... The end is connected to a ring-shaped connecting plate 3. The protective cylinder 7 is fixed inside the drilling frame 6. The servo motor 4 is installed on the top of the support ring inside the protective cylinder 7, and its end is fixedly connected to the connecting plate 3. The output shaft passes through the support ring and is fixed to the drill core 5. During the inspection operation, the hydraulic cylinder 2 is started, and the piston shaft drives the connecting plate 3, the servo motor 4, and the drill core 5 to move downward together, so that the drill core 5 slowly approaches the part of the tunnel invert to be inspected. When the drill core 5 contacts the surface of the invert, the servo motor 4 is started, and its output shaft drives the drill core 5 to rotate at high speed. With the rotational cutting force of the drill core 5, the invert is inspected. During the drilling operation, the hydraulic cylinder 2 continuously provides a stable downward pressure to the drill core 5 to ensure that the drill core 5 can be drilled smoothly into the invert arch. At the same time, the protective sleeve 7 protects the servo motor 4 to prevent debris, dust and other materials generated during the drilling process from entering the motor and affecting its normal operation. As the drill core 5 continues to drill into the invert arch, when the required testing depth is reached, the servo motor 4 is turned off to stop the rotation of the drill core 5. Then, the hydraulic cylinder 2 is controlled to retract the piston shaft to lift the drill core 5 and the attached invert arch core sample upward together, completing one core drilling test operation.

[0050] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A core drilling device for detecting the thickness of a tunnel invert arch, characterized in that, The system includes a drilling frame (6), connecting blocks (8), connecting strips (9), and fixing strips (12). The drilling frame (6) is equipped with a protective cylinder (7) inside, and a servo motor (4) is installed inside the protective cylinder (7). A support frame (1) is inserted into the top of the drilling frame (6). A hydraulic cylinder (2) is installed inside the support frame (1). A connecting plate (3) is fixedly connected to the piston shaft of the hydraulic cylinder (2). The connecting plate (3) is fixedly connected to the servo motor (4). A drill core (5) is fixedly connected to the output shaft of the servo motor (4). Connecting blocks (8) are installed on both sides of the bottom of the drilling frame (6). A connecting strip (9) is installed at the bottom of the connecting block (8) with a nut. Support rods (10) are hinged on both sides of the bottom of the connecting strip (9). The other end of the support rod (10) is hinged to a sliding hinge (11). The bottom of the sliding hinge (11) is slidably installed inside the fixing strip (12) and fixed with the fixing rod (13).

2. The core drilling device for detecting the thickness of a tunnel invert arch according to claim 1, characterized in that: The top two sides of the drilling frame (6) are provided with symmetrically distributed connecting cylinders (19), and the bottom of the support frame (1) is provided with connecting columns. The connecting columns are inserted into the connecting cylinders (19) for fixation. The bottom of the support frame (1) is fixedly connected with a hydraulic cylinder (2), and the bottom of the piston shaft of the hydraulic cylinder (2) is fixedly connected with a connecting plate (3). The connecting plate (3) is in the shape of a ring.

3. The core drilling device for detecting the thickness of a tunnel invert arch according to claim 2, characterized in that: The drilling frame (6) has a cylindrical protective cylinder (7) fixed inside. The protective cylinder (7) has a support ring inside. A servo motor (4) is installed at the top of the support ring. The end of the servo motor (4) is fixedly connected to the connecting plate (3). The output shaft of the servo motor (4) passes through the support ring and is fixedly connected to the drill core (5).

4. The core drilling device for detecting the thickness of a tunnel invert arch according to claim 1, characterized in that: The bottom corners of the drilling frame (6) are fitted with connecting blocks (8) by bolts. The bottom of the connecting blocks (8) is provided with symmetrically distributed threaded connecting rods (14). The connecting strip (9) is provided with symmetrically distributed connecting holes (15). The threaded connecting rods (14) are inserted into the connecting holes (15) and fixedly connected with nuts.

5. A core drilling device for detecting the thickness of a tunnel invert arch according to claim 4, characterized in that: The bottom sides of the connecting bar (9) are provided with single hinge ears, and the two ends of the support rod (10) are fixed with double hinge ears. The double hinge ears at one end of the support rod (10) are hinged to the single hinge ears at the bottom of the connecting bar (9) through a rotating shaft, and the other end of the support rod (10) is hinged to the top of the sliding hinge ear (11) through a rotating shaft.

6. A core drilling device for detecting the thickness of a tunnel invert arch according to claim 5, characterized in that: The bottom of the sliding hinge (11) is provided with a slide plate (16), and the top of the fixing strip (12) is provided with a groove (17). The slide plate (16) is slidably installed inside the groove (17). The top of the fixing strip (12) is provided with multiple equidistant limiting holes. The slide plate (16) is provided with a fixing hole. The fixing rod (13) passes through the fixing hole and passes through the slide plate (16). The end of the fixing rod (13) cooperates with the limiting hole to limit and fix it. The two ends of the fixing strip (12) are fixed with fixing hinges (18).

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