Coring bit for pavement quality detection

Abstract

The utility model discloses a coring drill bit for pavement quality detection, which belongs to the technical field of coring drill bits and is characterized in that a drill bit seat matched with lifting equipment is mounted at the bottom of a top plate, and a coring drill bit is mounted at the bottom of the drill bit seat; multiple groups of mounting columns are movably mounted at the edge part of the top plate, supporting rings are connected to the bottoms of the mounting columns, threaded parts are formed in the tops of the mounting columns, and anti-falling nuts are mounted on the threaded parts; a plurality of sets of arc-shaped inserting grooves are formed in the outer side of the threaded ring, arc-shaped extrusion cavities are formed in the inner sides of the arc-shaped inserting grooves, locking cavities penetrating through the threaded ring are formed in the inner sides of the arc-shaped extrusion cavities, and locking pieces are slidably mounted in the locking cavities; a locking ring is movably installed on the outer side of the threaded ring, and a plurality of sets of locking arc plates are arranged at the bottom of the locking ring. Under the cooperation of the supporting ring and the mounting column, the device can be supported during coring operation, and under the action of the anti-falling nut, the device can be tightly fixed, the threaded ring is prevented from loosening after being used for a long time, and the stability is improved through the design.

Description

Technical Field

[0001] This utility model relates to the field of core drilling technology, specifically a core drilling bit used for road surface quality testing. Background Technology

[0002] Coring is an essential step in verifying the quality of highway construction, and currently, roadbed core drilling rigs are commonly used for roadbed quality testing. Core drill bits are primarily used to drill holes in products such as steel plates. Hollow drill bits are used with specialized core drilling machines. Thin-walled diamond core drill bits are also available. Concrete core samples are drilled directly from structural concrete. After processing, the core samples undergo compressive strength testing. This method is widely recognized as a relatively intuitive and reliable way to test concrete strength. Based on material, there are alloy drill bits and tool steel drill bits.

[0003] Patent application CN219672598U discloses an automated core sampling device for road core drilling machines, including a drill bit body with an annular pneumatic jack housing located at the middle of the top of the drill bit body. The device comprises the annular pneumatic jack housing, a pressure relief valve, a one-way valve, a first telescopic column, a second telescopic column, an ejector plate, and a return spring. An external air pump connected to the one-way valve inflates the annular pneumatic jack housing while the pressure relief valve is closed. As the internal air pressure of the pneumatic jack housing increases, it pushes the first and second telescopic columns and the ejector plate downwards, ejecting the road core sample drilled from the drill bit body. After the core sample is removed, the pressure relief valve is opened to reduce the internal air pressure of the annular pneumatic jack housing. The return spring then pulls the first and second telescopic columns back to their original positions, automatically ejecting and resetting the core sample. This ensures the integrity of the core sample and the safety of the drill bit, significantly improving the core sampling rate of the road core drilling machine.

[0004] However, the road coring drill bits disclosed above have a complicated installation process, are time-consuming and labor-intensive, and have poor stability during coring, lacking a support structure that can be quickly disassembled and assembled. Utility Model Content

[0005] The purpose of this invention is to provide a core drill bit for road surface quality inspection, which addresses the problems of cumbersome and time-consuming installation, poor stability during core sampling, and lack of a support structure that allows for quick assembly and disassembly.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: a core drill bit for road surface quality testing, comprising a top plate, a lifting device mounted on the top of the top plate, a drill bit seat cooperating with the lifting device mounted on the bottom of the top plate, and a core drill bit mounted on the bottom of the drill bit seat; multiple sets of mounting posts are movably mounted on the edge of the top plate, a support ring is connected to the bottom of each mounting post, a limiting protrusion ring cooperating with the top plate is provided on the outer wall of each mounting post, a threaded portion is provided on the top of each mounting post, and an anti-loosening nut is mounted on the threaded portion; the anti-loosening nut includes a threaded ring, multiple sets of arc-shaped slots are provided on the outer side of the threaded ring, an arc-shaped compression cavity is provided on the inner side of each arc-shaped slot, a locking cavity penetrating the threaded ring is provided on the inner side of each arc-shaped compression cavity, and a locking element is slidably mounted in the locking cavity; a locking ring is movably mounted on the outer side of the threaded ring, and multiple sets of locking arc plates are provided at the bottom of the locking ring, the locking arc plates are movably disposed in the arc-shaped compression cavity and compress and lock the locking element.

[0007] As a further embodiment of this utility model: the locking member includes a locking part and a pressing part, the arc-shaped pressing cavity has multiple sets of mounting holes inside, a return spring is provided inside the mounting hole, and the pressing part is connected to the outside of the return spring.

[0008] As a further improvement of this utility model, the top of the locking ring is provided with multiple sets of toggle blocks.

[0009] As a further improvement of this utility model, the bottom of the support ring is provided with multiple sets of anti-slip grooves.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This invention, through the cooperation of the support ring and the mounting column, can support the equipment during core sampling operations, preventing accidental displacement, and can be firmly fixed by the anti-loosening nut. During installation, the locking ring compresses the locking component, at which point the compressing part slides inward and locks the threaded part on the mounting column, preventing the threaded ring from loosening after long-term use. This design improves the stability of the core drill bit used for road quality inspection. Attached Figure Description

[0012] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0013] Figure 1 This is the three-dimensional structure of the present invention. Figure 1 ;

[0014] Figure 2 This is the three-dimensional structure of the present invention. Figure 2 ;

[0015] Figure 3 This is a three-dimensional structural diagram of the threaded ring in this utility model;

[0016] Figure 4 This is a cross-sectional view of the threaded ring in this utility model;

[0017] Figure 5 This is a three-dimensional structural diagram of the locking component in this utility model;

[0018] Figure 6 This is a three-dimensional structural diagram of the locking ring in this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Top plate; 2. Lifting equipment; 3. Drill bit holder; 4. Core drill bit; 5. Mounting column; 6. Support ring; 7. Anti-slip groove; 8. Limiting protrusion ring; 9. Threaded part; 10. Anti-loosening nut; 1001. Threaded ring; 1002. Arc-shaped slot; 1003. Arc-shaped extrusion chamber; 1004. Locking chamber; 1005. Locking element; 1006. Locking part; 1007. Extrusion part; 1008. Mounting hole; 1009. Return spring; 1010. Locking ring; 1011. Locking arc plate; 1012. Toggle block. Detailed Implementation

[0021] The following will be combined with the appendix Figures 1 to 6 The technical solution of this utility model has been clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] This utility model provides an improved core drilling bit for road surface quality inspection, such as... Figures 1-6As shown, the system includes a top plate 1, a lifting device 2 mounted on the top of the top plate 1, a drill bit holder 3 that mates with the lifting device 2 mounted on the bottom of the top plate 1, and a core drill bit 4 mounted on the bottom of the drill bit holder 3. Multiple sets of mounting posts 5 are movably mounted on the edge of the top plate 1. A support ring 6 is connected to the bottom of each mounting post 5. A limiting protrusion 8 that mates with the top plate 1 is provided on the outer wall of each mounting post 5. A threaded portion 9 is provided on the top of each mounting post 5, and an anti-loosening nut 10 is mounted on the threaded portion 9. The anti-loosening nut 10 includes a threaded ring 1001, and the outer side of the threaded ring 1001... Multiple sets of arc-shaped slots 1002 are provided. An arc-shaped extrusion cavity 1003 is provided on the inner side of the arc-shaped slot 1002. A locking cavity 1004 that penetrates the threaded ring 1001 is provided on the inner side of the arc-shaped extrusion cavity 1003. A locking member 1005 is slidably installed in the locking cavity 1004. A locking ring 1010 is movably installed on the outer side of the threaded ring 1001. Multiple sets of locking arc plates 1011 are provided at the bottom of the locking ring 1010. The locking arc plates 1011 are movably disposed in the arc-shaped extrusion cavity 1003 and extrude and lock the locking member 1005.

[0023] This invention, with the cooperation of the support ring 6 and the mounting post 5, can support the equipment during core extraction, preventing accidental displacement, and can be firmly fixed by the anti-loosening nut 10. During installation, the threaded ring 1001 is first installed onto the threaded portion 9. When installing the locking ring 1010, the locking arc plate 1011 is first inserted into the arc-shaped slot 1002, and then the locking ring 1010 is rotated clockwise. When the locking arc plate 1011 presses against the pressing portion 1007, the locking member 1005 slides inward along the locking cavity 1004 and locks the threaded portion 9 on the mounting post 5.

[0024] See appendix Figure 6 The top of the locking ring 1010 is provided with multiple sets of toggle blocks 1012.

[0025] In this embodiment: To facilitate the rotation of the locking ring 1010, a toggle block 1012 structure is designed.

[0026] See appendix Figure 3 - Appendix Figure 6 The locking member 1005 includes a locking part 1006 and a pressing part 1007. The arc-shaped pressing cavity 1003 has multiple sets of mounting holes 1008 inside. A return spring 1009 is provided inside the mounting hole 1008. The pressing part 1007 is connected to the outside of the return spring 1009.

[0027] In this embodiment: when the whole assembly and disassembly are required, the locking ring 1010 is rotated counterclockwise and the locking arc plate 1011 is disengaged from the pressing part 1007. At this time, under the action of the return spring 1009, the locking part 1005 automatically pops outward, and the locking part 1006 disengages from the threaded part 9 on the mounting post 5 and is unlocked.

[0028] See appendix Figure 2 The bottom of the support ring 6 has multiple anti-slip grooves 7.

[0029] In this embodiment: during the core extraction operation, in order to increase friction and avoid accidental slippage, anti-slip grooves 7 are designed.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. A core drill bit for road surface quality inspection, characterized in that: The system includes a top plate (1), a lifting device (2) is installed on the top of the top plate (1), a drill bit holder (3) that cooperates with the lifting device (2) is installed on the bottom of the top plate (1), and a core drill bit (4) is installed on the bottom of the drill bit holder (3); multiple sets of mounting posts (5) are movably installed on the edge of the top plate (1), a support ring (6) is connected to the bottom of the mounting post (5), a limiting protrusion ring (8) that cooperates with the top plate (1) is provided on the outer wall of the mounting post (5), a threaded part (9) is opened on the top of the mounting post (5), and an anti-loosening nut (10) is installed on the threaded part (9); the anti-loosening nut (10) includes a threaded ring (1001), the threaded ring ( Multiple sets of arc-shaped slots (1002) are provided on the outer side of the threaded ring (1001). An arc-shaped extrusion cavity (1003) is provided on the inner side of the arc-shaped slot (1002). A locking cavity (1004) penetrating the threaded ring (1001) is provided on the inner side of the arc-shaped extrusion cavity (1003). A locking member (1005) is slidably installed in the locking cavity (1004). A locking ring (1010) is movably installed on the outer side of the threaded ring (1001). Multiple sets of locking arc plates (1011) are provided at the bottom of the locking ring (1010). The locking arc plates (1011) are movably disposed in the arc-shaped extrusion cavity (1003) and extrude and lock the locking member (1005).

2. The core drill bit for road surface quality inspection according to claim 1, characterized in that: The locking member (1005) includes a locking part (1006) and a pressing part (1007). The arc-shaped pressing cavity (1003) has multiple sets of mounting holes (1008) inside. A return spring (1009) is provided inside the mounting hole (1008). The pressing part (1007) is connected to the outside of the return spring (1009).

3. A core drill bit for road surface quality inspection according to claim 1, characterized in that: The top of the locking ring (1010) is provided with multiple sets of toggle blocks (1012).

4. A core drill bit for road surface quality inspection according to claim 1, characterized in that: The bottom of the support ring (6) has multiple anti-slip grooves (7).

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