An automated detection and grouting repair cone penetration drill bit for embankment cone penetration vehicles

Abstract

This invention discloses an automated detection and grouting repair conical drill bit for dam conical drilling vehicles, belonging to the field of dam maintenance technology. It includes a drill bit body, an electrical detection component, a multi-source information acquisition component, and a repair component. The front end of the drill bit body has a drilling structure. The electrical detection component, located on the drilling structure, is used to collect real-time ground electrical parameters, including conductivity parameters, during the drilling process. The multi-source information acquisition component, located on the drill bit body, is used to collect real-time biological activity characteristic information within the ground during drilling. The repair component, located on the drill bit body and signal-connected to the multi-source information acquisition component, can release repair material to the target location based on the biological activity characteristic information. This invention achieves integrated, automated, and precise detection and repair of hidden cavities of harmful animals within dams.

Description

Technical Field

[0001] This invention relates to the field of dam maintenance technology, and in particular to an automated detection and grouting repair drill bit for dam cone penetration vehicles. Background Technology

[0002] A dam is a water conservancy project used for water retention, flood control, and irrigation. Conventional dams are mostly constructed using a mixture of earth and rock. After long-term service, they inevitably suffer from the combined effects of natural environmental changes, biological activities, and human disturbance, making them prone to various types of hidden defects. In particular, the nesting, foraging, and migration activities of termites, rodents, and badgers within the dam can damage its original structure, creating hidden cavities such as through-holes and loose areas. These cavities can further induce serious safety problems such as seepage and piping. Therefore, it is necessary to regularly inspect and remove these hidden cavities created by detrimental animals to ensure the safety of the dam.

[0003] Currently, the detection of defects in hidden cavities formed by dam-damping animals mainly relies on manual judgment, surface inspection, and localized drilling and sampling. Manual inspection focuses primarily on the dam surface, inferring the actual internal conditions by observing indirect features such as ant trails, swarming holes, or abnormal wet patches. However, this method is highly subjective and struggles to effectively identify deep nests and early activity areas of dam-damping animals. Furthermore, while traditional drilling or cone probing can obtain relevant information about local strata, it is typically only used for mechanical parameter testing or sampling analysis, resulting in limited information that cannot comprehensively reflect the spatial distribution characteristics of these hidden cavities.

[0004] Furthermore, even when termite nests are discovered, current engineering practices commonly employ a method of first manually drilling holes, followed by grouting or surface treatment. This approach typically requires separate grouting operations after inspection and experience-based assessment, separating the inspection and repair processes. This operational mode not only increases the number of construction steps and the work cycle, but also, due to potential errors in hole placement or insufficient understanding of the termite nest's spatial structure, often results in the polymer grouting material not being accurately applied to the core activity areas of the termites, thus affecting the treatment effect. Summary of the Invention

[0005] The purpose of this invention is to provide an automated detection and grouting repair cone drill bit for dam cone drilling vehicles, so as to solve the technical problems of low efficiency and poor effect in the detection and grouting process of hidden cavities formed by harmful animals in dams in the existing technology.

[0006] To achieve this objective, the present invention adopts the following technical solution: An automated detection and grouting repair cone drill bit for dam cone drilling vehicles, comprising: The drill bit body has a drilling structure at its front end. An electrical detection component is installed on the drilling structure and is used to collect formation electrical parameters in real time during the drilling process of the drill bit body, wherein the formation electrical parameters include electrical conductivity parameters; A multi-source information acquisition component is installed on the drill bit body. The multi-source information acquisition component is used to collect biological activity characteristic information in the formation in real time during the drilling process of the drill bit body. A repair component is disposed on the drill bit body. The repair component is signal-connected to the multi-source information acquisition component. The repair component can release repair material to the target location based on the biological activity characteristic information.

[0007] Preferably, the electrical detection component includes at least one conductivity electrode, which is disposed within the drilling structure and is used to contact the formation soil and collect the conductivity parameters during the drilling process of the drill bit body. An insulating isolation structure is provided between the conductivity electrode and the drill bit body, the insulating isolation structure being used to electrically isolate the conductivity electrode from the drill bit body.

[0008] Preferably, the insulating isolation structure includes: at least two insulating blocks distributed along the axial direction, the insulating blocks being embedded inside the drilling structure for fixing and supporting the conductivity electrode; and an insulating section disposed between the conductivity electrode and the drill bit body for isolating the detection area where the conductivity electrode is located from the metal structure of the drill bit body.

[0009] Preferably, the multi-source information acquisition component includes: a visual acquisition unit disposed on the drill bit body for acquiring image information of the geological structure around the borehole; a gas acquisition unit disposed on the drill bit body for acquiring characteristic gases related to biological activity in the strata around the borehole and generating gas concentration signals; and a temperature acquisition unit disposed on the drill bit body for acquiring soil temperature changes related to biological activity in the strata around the borehole and generating temperature change signals.

[0010] Preferably, the visual acquisition unit includes a miniature camera, the front end of which is provided with a protective window, the outer surface of which is flush with or recessed with the outer wall of the drill bit body, and a supplementary light source is provided around the miniature camera.

[0011] Preferably, the gas acquisition unit includes a gas sensor for detecting the concentration of the characteristic gas; the side wall of the drill bit body has a gas acquisition window facing the detection end of the gas sensor, and the gas acquisition window is covered with a gas acquisition film, which allows gas molecules to pass through while blocking liquid water and solid particles from entering; a protective net is provided on the outside of the gas acquisition window to prevent large particles from directly contacting the gas acquisition film.

[0012] Preferably, the repair assembly includes: an injection sub, coaxially connected to the tail end of the drill bit body; an injection channel extending axially along the injection sub for communication with an external grouting system; at least one injection hole located on the side wall of the injection sub, communicating with the injection channel for releasing repair material to the target location; and a one-way control valve located in the injection hole for opening under injection pressure to release the repair material and automatically closing after injection stops to prevent backflow of formation material.

[0013] Preferably, an isolation and sealing structure is provided between the injection sub and the drill bit body to physically isolate the injection channel from the detection area where the multi-source information acquisition component is located.

[0014] Preferably, the device further includes: a control circuit board disposed within the drill bit body, the control circuit board being electrically connected to the electrical detection component and the multi-source information acquisition component, respectively, for collecting, processing, and converting the acquired multi-source signals; and a metal conduit disposed within the drill bit body and arranged along the axial direction of the drill bit body, the metal conduit being electrically connected to the control circuit board, for transmitting the processed multi-source signals towards the upper drill pipe.

[0015] Preferably, the device further includes a signal quick-connect connector disposed at the tail end of the drill bit body. The signal quick-connect connector has a connection structure for mechanical connection with the upper drill pipe and a multi-core electrical contact pin for electrical connection with the metal conduit, so as to realize the mechanical connection and synchronous electrical signal docking between the drill bit body and the upper drill pipe.

[0016] The beneficial effects of this invention are: This invention proposes an automated detection and grouting repair conical drill bit for dam conical drilling vehicles. By incorporating an electrical detection component on the drilling structure at the front end of the drill bit, the drill bit can simultaneously acquire electrical parameters of the strata, particularly conductivity, during its drilling and propulsion. Since the nests, channels, and other concealed cavities formed by dam-damping animals significantly alter the physical properties of the surrounding soil, such as conductivity, the real-time data acquisition from the electrical detection component allows for continuous sensing of electrical anomalies in the surrounding strata during drilling, thereby identifying the presence and location of these concealed cavities. Simultaneously, a multi-source information acquisition component on the drill bit can synchronously collect biological activity characteristics within the strata during drilling. These biological activity characteristics can include various physical or chemical signals, such as sound, vibration, and specific biological metabolites, characterizing the presence and activity intensity of dam-damping animals like termites and rodents. Real-time monitoring by the multi-source information acquisition component not only further verifies whether the abnormal areas detected by the electrical detection component are indeed caused by the activity of dike-damping animals, but also accurately detects deeper information such as the activity level of dike-damping animals and the spatial structure of hidden cavities inside their nests. Furthermore, the repair component in this invention establishes a signal connection with the multi-source information acquisition component. Once the multi-source information acquisition component identifies and confirms the core area of ​​biological activity, it can immediately trigger the repair component, releasing repair materials, such as grouting materials for filling cavities and killing termites and other dike-damping animals, to the target location. This integrates the originally independent detection and grouting processes, avoiding the waste of repair materials or poor treatment effects caused by inaccurate secondary hole positioning. It ensures that the repair materials act on the core area of ​​dike-damping animal activity, thereby maximizing the treatment effect. Simultaneously, it reduces construction procedures, shortens the work cycle, and improves the overall efficiency of dike maintenance. In summary, this invention effectively solves the problems of low efficiency and poor results in the detection and injection processes of existing technologies through structural integration and functional synergy, and realizes integrated, automated, and precise detection and repair of hidden cavities of animals that harm the dike inside the dam. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the cone drill bit for automated detection and grouting repair of dam cone drilling vehicles provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of a portion of the cone drill bit used for automated detection and grouting repair of dam cone drill vehicles, as provided in an embodiment of the present invention. Figure 3 This is a cross-sectional view of another part of the cone drill bit for automated detection and grouting repair of dam cone drill vehicles provided in this embodiment of the invention; Figure 4This is a cross-sectional view of another part of the cone drill bit for automated detection and grouting repair of dam cone drill vehicles provided in this embodiment of the invention.

[0018] In the picture: 1. Drill bit body; 11. Drilling structure; 2. Electrical detection components; 21. Conductivity electrode; 22. Insulation and isolation structure; 221. Insulating block; 222. Insulating section; 3. Multi-source information acquisition components; 31. Miniature camera; 32. Protective window; 33. Gas sensor; 34. Gas sampling window; 35. Gas sampling membrane; 4. Repair components; 41. Injection sub; 42. Injection channel; 43. Injection port; 44. One-way control valve; 45. Isolation and sealing structure; 5. Control circuit board; 6. Metal conduit; 7. Signal quick-connect connector. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] See Figures 1 to 4 The automated detection and grouting repair conical drill bit for dam conical drilling vehicles provided in this embodiment of the invention includes a drill bit body 1, an electrical detection component 2, a multi-source information acquisition component 3, and a repair component 4. The drill bit body 1 has a drilling structure 11 at its front end; the electrical detection component 2 is disposed on the drilling structure 11 and is used to collect formation electrical parameters in real time during the drilling process of the drill bit body 1, including conductivity parameters; the multi-source information acquisition component 3 is disposed on the drill bit body 1 and is used to collect biological activity characteristic information within the formation in real time during the drilling process of the drill bit body 1; the repair component 4 is disposed on the drill bit body 1 and is signal-connected to the multi-source information acquisition component 3, and the repair component 4 can release repair material to the target location based on the biological activity characteristic information.

[0024] The automated detection and grouting repair conical drill bit for dam conical drilling vehicles proposed in this invention, by setting an electrical detection component 2 on the drilling structure 11 at the front end of the drill bit body 1, enables the drill bit body 1 to collect the electrical parameters of the strata in real time, especially the electrical conductivity parameters, while breaking through the soil and advancing. Since the nests, channels, and other hidden cavities formed by the activity of dam-damping animals can cause significant changes in the physical properties of the surrounding soil, such as electrical conductivity, the real-time data acquisition of the electrical detection component 2 can continuously sense the electrical anomalies of the surrounding strata during drilling, thereby discovering the existence and specific location of hidden cavities. Simultaneously, a multi-source information acquisition component 3 set on the drill bit body 1 can synchronously collect biological activity characteristic information within the strata during drilling. This biological activity characteristic information can be various physical or chemical signals, such as sound, vibration, and specific biological metabolites, that characterize the presence and activity intensity of dam-damping animals such as termites and rodents. Through real-time monitoring by the multi-source information acquisition component 3, it is possible not only to further verify whether the abnormal areas detected by the electrical detection component 2 are indeed caused by the activity of dike-damping animals, but also to more accurately detect the activity level of dike-damping animals, the spatial structure inside their nests, and other hidden cavities. Furthermore, the repair component 4 in this invention establishes a signal connection with the multi-source information acquisition component 3. When the multi-source information acquisition component 3 identifies and confirms the core area of ​​biological activity, it can immediately trigger the repair component 4, releasing repair materials, such as grouting materials for filling cavities and killing termites and other dike-damping animals, to the target location. This integrates the originally independent detection and grouting processes into one, avoiding the waste of repair materials or poor treatment effects caused by inaccurate secondary hole positioning. It ensures that the repair materials can act on the core area of ​​dike-damping animal activity, thereby maximizing the treatment effect. Simultaneously, it reduces construction procedures, shortens the work cycle, and improves the overall efficiency of dike maintenance. In summary, this invention effectively solves the problems of low efficiency and poor results in the detection and injection processes of existing technologies through structural integration and functional synergy, and realizes integrated, automated, and precise detection and repair of hidden cavities of animals that harm the dike inside the dam.

[0025] The working principle and specific structure of the automated detection and grouting repair cone drill bit used for dam cone drilling vehicles are described in detail below.

[0026] First, the hidden cavities inside the dam, which are the focus of this invention, will be described. During the long-term service of a dam, the biological activities of animals that damage the dam, such as termites, rodents, and badgers, are one of the main factors leading to hidden defects within the dam structure. Taking termites as an example, during their nest-building process, they typically construct large nest structures, including a deep main nest cavity and tunnels for passage. The main nest cavity and tunnels are often interconnected, forming an elevated structure with a certain spatial volume. Rodents and badgers, through burrowing, create irregular burrows or through-holes within the dam structure. These structures also compromise the dam's compactness and integrity. Furthermore, some areas of biological activity may be accompanied by disturbance of the soil structure, forming fractured zones or weak areas that are looser than the original strata.

[0027] Nests, pores, and loose zones directly or indirectly caused by the biological activities of dike-damping animals can all be considered as hidden cavities to be detected and repaired by this invention. It should be noted that the above examples are merely illustrative of typical application scenarios of this invention and do not constitute a limitation on the scope of protection of this invention. In practical engineering applications, the conical drill bit described in this invention is also suitable for treating cavities, cracks, or loose areas formed inside dikes due to other reasons, such as uneven settlement, seepage erosion, and plant root rot. As long as the area has physical characteristics different from the surrounding normal strata and requires filling or reinforcement, the technical solution provided by this invention can be used for detection and repair. This invention does not strictly limit the specific causes and morphology of hidden cavities.

[0028] In this embodiment, the cone drill bit includes a drill bit body 1 for drilling operations in the dam soil. The drill bit body 1 serves as the structural carrier of the entire device, and a drilling structure 11 is provided at the front end of the drill bit body 1. The drilling structure 11 typically uses a carbide cutting edge or a wear-resistant weld layer to adapt to the dense layers or scattered gravel inclusions that may exist in the dam fill soil, ensuring that the drill bit can successfully break through the soil.

[0029] Specifically, the external structure of the drill bit body 1 is designed to be suitable for rotary drilling or static pressure penetration operations in the soil of dams. The main body of the drill bit body 1 is made of wear-resistant alloy steel material and is integrally machined and tempered and surface hardened to achieve a high hardness level on the surface of the drill bit body 1, thereby improving the ability of the drill bit body 1 to resist wear and impact during reciprocating use.

[0030] To further ensure the control accuracy of the drilling direction, the outer surface of the drill bit body 1 is set to a smooth structure, and the cross-sectional shape of the drill bit body 1 can adopt a regular hexagonal design. The non-circular cross-sectional shape can effectively increase the frictional engagement between the drill bit body 1 and the surrounding soil, preventing the drill bit body 1 from spinning freely during drilling or causing borehole deviation due to uneven local resistance, thereby ensuring the verticality and positional accuracy of the cone borehole.

[0031] In terms of size design, the outer diameter and axial length of the drill bit body 1 can be reasonably configured according to the needs of conventional dam taper operations. For example, they can be set to a commonly used diameter and length to ensure drilling efficiency while providing sufficient space for the internal functional components.

[0032] The drill bit body 1 has an axially extending internal cavity that serves as an integrated path for various circuits and pipelines. This cavity is used to arrange in parallel the signal leads required for the electrical detection component 2, the data transmission structure required for the multi-source information acquisition component 3, and the grouting pipelines required for the repair component 4. Specifically, the internal cavity is designed as an axially extending hole with a sufficient inner diameter to accommodate the aforementioned functional circuits and pipelines.

[0033] To enable drilling-while-drilling detection of hidden cavities inside the dam, an electrical detection component 2 is installed on the conical drill bit. This component is located at the drilling structure 11 at the front end of the drill bit body 1 and is used to collect real-time electrical parameters of the formation during drilling. For example, electrical conductivity parameters, which reflect changes in soil compaction and water content, are crucial. Since animal nests that damage the dam and their surrounding disturbed areas often exhibit significantly different electrical characteristics from the original compacted soil—such as low electrical conductivity anomalies caused by air or filling material inside the nest cavities, or high electrical conductivity anomalies caused by secretions from biological activity or accumulated water—real-time monitoring of changes in electrical conductivity parameters allows for rapid identification of the location and distribution range of hidden cavities.

[0034] Specifically, the electrical detection component 2 includes at least one conductivity electrode 21, which is disposed in the drilling structure 11 at the front end of the drill bit and is used to maintain direct contact with the surrounding soil during the drilling process of the drill bit body 1, thereby continuously collecting conductivity parameters.

[0035] To ensure the long-term stable operation of the conductivity electrode 21 in the high humidity and high water content soil environment of the dam, the conductivity electrode 21 can be made of a material with excellent corrosion resistance, such as 316L stainless steel. The surface of the conductivity electrode 21 is polished and treated with anti-corrosion to effectively resist the erosion of water and corrosive media in the soil.

[0036] In terms of arrangement, the conductivity electrodes 21 are arranged symmetrically, for example, two or more conductivity electrodes 21 are arranged symmetrically along the outer periphery of the drill bit body 1, so that the changes in formation electrical properties can be sensed from multiple directions, thereby improving the representativeness and accuracy of the detection results.

[0037] The axial width of the conductivity electrode 21 can be set according to the contact area and sensitivity requirements, for example, it can be set to a ring structure of about 10 mm to ensure stable and sufficient electrical contact with the formation during drilling.

[0038] The conductivity electrode 21 is electrically connected to the control circuit board 5 or data acquisition unit at the rear end through the electrode lead set inside the drill bit body 1, thereby transmitting the real-time acquired electrical signals to the ground processing system to realize continuous and real-time acquisition and recording of the electrical characteristics of termite nests and abnormal soil areas.

[0039] To ensure the independence and accuracy of electrical detection and to avoid interference from the metal drill bit body 1 to weak electrical signals, an insulating isolation structure 22 is provided between the conductivity electrode 21 and the drill bit body 1. The insulating isolation structure 22 is used to electrically isolate the conductivity electrode 21 from the drill bit body 1.

[0040] In a preferred embodiment, the insulating isolation structure 22 includes at least two insulating blocks 221 distributed along the axial direction and an insulating section 222 disposed between the conductivity electrode 21 and the drill bit body 1. Specifically, the insulating blocks 221 are embedded inside the drilling structure 11 at the front end of the drill bit to fix and support the conductivity electrode 21, so that the conductivity electrode 21 remains in a stable position while withstanding drilling vibration and impact forces.

[0041] Insulating block 221 is made of high-strength insulating material, such as polytetrafluoroethylene (PTFE). PTFE not only has excellent electrical insulation properties, but also good wear resistance and chemical corrosion resistance, and can adapt to the complex environmental conditions in the dam soil.

[0042] The insulating block 221 is fixed inside the drill bit body 1 at the corresponding position by an embedding method. The outer diameter of the insulating block 221 matches the inner cavity of the drill bit body 1, and the inner side is provided with an insulating channel for passing through the lead wire of the conductivity electrode 21, thereby ensuring that the electrode lead wire is always in a reliable insulating state under drilling vibration and impact conditions.

[0043] Multiple insulating blocks 221 are arranged sequentially in the axial direction to form a partition structure, which clearly blocks the electrical path between the conductivity electrode 21 and the drill bit body 1, effectively preventing interference with the electrical detection results due to metal conduction, current diffusion or signal crosstalk.

[0044] An insulating section 222 is disposed between the conductivity electrode 21 and the drill bit body 1, specifically at the transition area between the mounting area of ​​the conductivity electrode 21 and the drill bit body 1. The insulating section 222 is also filled or sleeved with insulating material to further and effectively separate the upper metal structure of the drill bit body 1 from the lower conductivity detection area, forming a clear electrical isolation barrier.

[0045] Through the combined design of the insulating block 221 and the insulating section 222, the conductivity electrode 21 and the drill bit body 1 form a stable, controllable and independent electrical measurement circuit during the drilling process. The drill bit body 1 serves only as a mechanical support and drilling tool, while the conductivity electrode 21 independently undertakes the function of electrical signal pickup. This not only ensures the real-time nature of electrical detection but also improves the reliability and anti-interference ability of the detection data.

[0046] The cone drill bit is equipped with a multi-source information acquisition component 3, which is installed on the drill bit body 1. It is used to collect biological activity characteristics information in the formation in real time during the drilling process, thereby providing multi-dimensional data support for the identification of the nature of hidden cavities.

[0047] Among them, the aforementioned biological activity characteristic information includes visual image information that can reflect traces of biological activity, characteristic gas information that can characterize biological metabolic activity, and temperature change information that can indicate the existence of biological clusters. The above information together depicts a comprehensive picture of biological activity from different perspectives.

[0048] The multi-source information acquisition component 3 specifically includes a vision acquisition unit, a gas acquisition unit, and a temperature acquisition unit. To integrate these multiple detection elements, a multi-source formation information acquisition cavity is axially arranged in the central region of the drill bit body 1. The vision acquisition unit, gas acquisition unit, and temperature acquisition unit are fixed within the acquisition cavity using a dedicated mounting bracket. The mounting bracket is made of insulating engineering plastic, and each detection and acquisition unit has limiting structures in both the axial and radial directions to ensure that it does not shift or become damaged during drilling operations due to vibration, impact, or changes in drill bit posture.

[0049] Specifically, the visual acquisition unit is used to acquire image information of the geological structure around the borehole. In a preferred embodiment, the visual acquisition unit includes a miniature camera 31, wherein the miniature camera 31 adopts an industrial-grade miniature CMOS imaging module, which has low-light imaging capability, so as to be able to image clearly even in the absence of natural light inside the borehole.

[0050] The miniature camera 31 has a protective window 32 at its front end. The protective window 32 is made of a high-hardness, wear-resistant, and transparent material, such as sapphire glass, to effectively protect the lens surface in highly abrasive soil environments. The outer surface of the protective window 32 is flush with or slightly concave with the outer wall of the drill bit body 1, thereby preventing soil particles from directly impacting the surface of the protective window 32 during drilling, thus extending the service life of the miniature camera 31 and maintaining image clarity.

[0051] The miniature camera 31 is encapsulated in a metal protective shell made of stainless steel, which gives the miniature camera 31 a high level of protection and enables it to work stably for a long time under complex conditions such as high humidity and mud.

[0052] To obtain clear observation images in the absence of natural light, a ring-shaped supplementary light source is also integrated around the periphery of the miniature camera 31. The supplementary light source uses high-brightness LEDs, which can continuously illuminate and observe the soil structure and morphology around the borehole during the drilling process.

[0053] The image data collected by the miniature camera 31 is connected to the control circuit board 5 inside the drill bit body 1 through a shielded data cable. The data cable is a bend-resistant multi-core shielded cable with a wear-resistant insulation layer on the outside and is laid along the internal axis of the drill bit body 1. It is limited by a fixed slot to prevent loosening or wear during drilling vibration.

[0054] The gas acquisition unit is used to acquire characteristic gases related to biological activity in the strata surrounding the borehole and generate gas concentration signals. Considering that termites and other dam-damaging animals produce high concentrations of characteristic gases such as carbon dioxide during their respiration and metabolism within their nests, detecting these gases can help identify the core areas of biological activity.

[0055] In a preferred embodiment, the gas acquisition unit includes a gas sensor 33, which may specifically be a solid-state infrared carbon dioxide gas detection module used to identify abnormal concentrations of characteristic gases produced by biological respiration and metabolism within the termite activity area. The gas sensor 33 is encapsulated in a metal protective housing, achieving a high overall protection standard to adapt to the humid environment within the dam soil.

[0056] To achieve gas collection, a gas collection window 34 is provided on the side wall of the drill bit body 1, facing the detection end of the gas sensor 33. A gas collection membrane 35 is covered on the gas collection window 34. The gas collection membrane 35 is made of a high-molecular permeable membrane material. The characteristic of the gas collection membrane 35 is that it allows gas molecules to pass through while effectively blocking liquid water and solid particles from entering the gas collection channel. This enables stable and continuous gas collection in the high-moisture-content dam soil environment and provides a reliable detection gas source for the gas sensor 33. The gas collection membrane 35 is fixed to the inside of the gas collection window 34 by a clamping ring and sealant, forming a reliable seal between the gas collection membrane 35 and the drill bit body 1, preventing mud or water from seeping into the gas collection channel during drilling.

[0057] To prevent large particles of mud or gravel from directly impacting the gas sampling membrane 35 during drilling, a protective net is installed on the outside of the gas sampling window 34. The protective net is made of woven stainless steel wire with appropriately sized mesh openings to prevent large particles from directly contacting the gas sampling membrane 35, thus avoiding mechanical damage or blockage. The gas inlet of the gas sensor 33 is connected to the gas sampling membrane 35 assembly via a sealed connection structure, allowing the collected gas to enter the sensor detection chamber without direct contact with external liquid water or mud, thereby ensuring the accuracy and stability of gas detection. The concentration signal collected by the gas sensor 33 is electrically connected to the control circuit board 5 via a shielded signal line and transmitted to the ground detection system.

[0058] The temperature acquisition unit is used to acquire soil temperature changes related to biological activity in the strata surrounding the borehole and generate temperature change signals. Since social organisms such as termites release heat when they are active in their nests, the soil temperature in the nest area differs from that of the surrounding native strata. By monitoring temperature changes in real time, auxiliary criteria can be provided for identifying areas of biological activity.

[0059] In a preferred embodiment, the temperature acquisition unit includes a temperature sensor, which can specifically be a digital temperature detection module, used to monitor the temperature of the formation surrounding the borehole in real time during drilling. The temperature sensor is encapsulated in a metal protective housing, achieving a high overall protection standard. To ensure the sensitivity and accuracy of temperature measurement, the temperature sensor is in close contact with the inner wall of the drill bit body 1 through a heat conduction structure, enabling the sensor to quickly sense temperature changes in the soil surrounding the borehole, while avoiding the impact of vibration and impact during drilling on measurement accuracy.

[0060] The temperature signal collected by the temperature sensor is electrically connected to the control circuit board 5 via a shielded signal cable. The shielded signal cable is covered with a wear-resistant insulating layer and is laid along the internal axial direction of the drill bit body 1. It is limited by a fixed slot to prevent loosening or wear during drilling. The temperature signal collected by the temperature sensor, along with the conductivity parameter and gas concentration signal, is synchronously transmitted to the ground detection system for comprehensive identification of termite nests and defective areas inside the dam.

[0061] Through the coordinated operation of the aforementioned visual acquisition unit, gas acquisition unit, and temperature acquisition unit, the multi-source information acquisition component 3 can simultaneously acquire biological activity characteristic information of the strata surrounding the borehole from multiple dimensions during the drilling process of the drill bit body 1. Visual image information can intuitively present the morphological structure of the nest cavity, gas concentration information can indicate the intensity of biological metabolic activity, and temperature change information can reflect the scale of biological clusters, together constituting a comprehensive detection of the hidden cavities inside the dam.

[0062] To achieve integrated detection and repair operations, a repair component 4 is installed on the conical drill bit. The repair component 4 is connected to the multi-source information acquisition component 3. Based on the biological activity characteristic information acquired by the multi-source information acquisition component 3, after identifying the target location that needs to be treated, the repair material is released in a directional manner to the target location, thereby achieving immediate filling and treatment of hidden cavities.

[0063] The repair component 4 includes an injection sub 41, an injection channel 42, a one-way control valve 44, and at least one injection port 43. The injection sub 41 is coaxially connected to the tail end of the drill bit body 1, serving as a connection structure between the repair material delivery pipeline and the drill bit body 1. The injection sub 41 has an injection channel 42 extending axially within it, which is used to connect to an external grouting system, for example, via a high-pressure hose to a grouting pump and repair material storage tank mounted on a cone drilling vehicle, thereby delivering repair materials such as polymer grouting material from the ground to the front end of the drill bit body 1 or the target formation location.

[0064] At least one injection hole 43 is provided on the side wall of the injection section 41. The injection hole 43 is connected to the injection channel 42 and is used to release the repair material into the surrounding strata after reaching the target location. The number and arrangement of the injection holes 43 can be reasonably set according to the requirements of grouting range and uniformity. For example, multiple injection holes 43 can be evenly distributed around the circumference of the injection section 41 to ensure uniform diffusion of the repair material in the target area.

[0065] The repair materials can be termite control-specific grouting materials. For example, grouting materials can include polymeric chemical grouting materials based on water-based or oil-based polyurethane. These materials can quickly foam, expand, and solidify upon contact with water, thereby effectively filling the nest cavity and forming a dense waterproof barrier around the nest.

[0066] To further achieve the function of killing termites, the polymer grouting material can also be uniformly mixed with an appropriate amount of termite control agents, such as bifenthrin, imidacloprid and other termite-killing ingredients. This allows the injected grout to kill or poison the termite colony in the nest by contact while filling the cavity, thereby eliminating the potential threat of termites from the root.

[0067] In another application scenario, when the detected defect area is loose soil or small pores formed by biological disturbance, cement-based grouting materials or clay slurry can be used as repair materials to achieve consolidation and seepage prevention of loose strata at a lower cost.

[0068] It should be noted that the specific examples of repair materials mentioned above are merely illustrative of the technical solution of the present invention and are not intended to limit it. In practical applications, those skilled in the art can select any suitable flowable and solidifiable material as the repair material according to the specific working conditions.

[0069] A one-way control valve 44 is installed at injection hole 43. The one-way control valve 44 adopts a diaphragm check valve structure. The working principle of the diaphragm check valve is that when the external grouting system applies positive injection pressure, the valve diaphragm opens under pressure, allowing the polymer grouting material to smoothly enter the surrounding formation through injection hole 43; when injection stops or injection pressure is released, the valve diaphragm automatically resets and closes under its own elasticity and formation pressure, thereby effectively preventing liquids, mud, or impurities in the formation from flowing back into injection channel 42. This avoids blockage or contamination of injection sub 41 and injection channel 42 due to backflow, ensuring that repair component 4 remains unobstructed and reliable throughout multiple operations. At the same time, the one-way control valve 44 has a simple structure and rapid response, and can adapt to the intermittent, pulse-like injection operation requirements during drilling grouting.

[0070] To ensure that the repair component 4 can work collaboratively with the aforementioned electrical detection component 2 and multi-source information acquisition component 3 without interference, an isolation sealing structure 45 is provided between the injection sub 41 and the drill bit body 1. The isolation sealing structure 45 is used to physically isolate the injection channel 42 from the detection area where the multi-source information acquisition component 3 is located.

[0071] Specifically, the isolation and sealing structure 45 is positioned between the injection section 41 and the lower detection component, completely separating the upper injection channel 42 from the lower detection and signal acquisition area. This creates a reliable, partitioned sealing structure inside the drill bit, effectively preventing the repair material from accidentally seeping into or flowing back into the precision sensor area during high-pressure grouting. This avoids contamination or damage to detection components such as the miniature camera 31, gas sensor 33, temperature sensor, and conductivity electrode 21. Simultaneously, this physical isolation prevents conductive components or chemicals in the grouting material from interfering with the accuracy of the electrical detection signals, ensuring the detection component continues to function normally after the repair work is completed, providing reliable data support for subsequent construction.

[0072] The isolation and sealing structure 45 is a cylindrical or stepped shaft structure that matches the inner cavity of the drill bit body 1. The outer diameter of the isolation and sealing structure 45 and the inner diameter of the drill bit body 1 are fitted with an interference fit or a transition fit to ensure stability and sealing after installation. The central area of ​​the isolation and sealing structure 45 can be provided with a wire passage hole along the axial direction for the detection line and signal transmission structure to pass through. The diameter of the wire passage hole is reasonably set according to the thickness of the wire harness to ensure that the line can pass through smoothly without affecting the sealing effect.

[0073] Furthermore, multiple annular sealing grooves can be provided on the outer circumferential surface of the isolation sealing structure 45. O-rings or other forms of elastic sealing elements are installed in the sealing grooves to form a radial compression seal between the sealing block and the inner wall of the drill bit body 1, preventing high-pressure grouting material from leaking from the gap between the two into the lower detection area.

[0074] To achieve stable transmission and processing of multi-source detection signals, a control circuit board 5 is installed inside the drill bit body 1. The control circuit board 5 is electrically connected to the electrical detection component 2 and the multi-source information acquisition component 3, respectively, and is used to uniformly collect, process and convert multi-source signals such as conductivity parameters, visual image information, gas concentration signals and temperature change signals.

[0075] In a preferred embodiment, the control circuit board 5 adopts a multi-layer printed circuit board structure and is fixedly installed in an independent electronic cavity inside the drill bit body 1. The electronic cavity is separated from the outside by a sealing structure to prevent mud or water from entering during drilling.

[0076] The control circuit board 5 integrates a main control processing chip, a signal conditioning circuit, and a power management module. The main control processing chip is used for timing control and data integration of multi-source detection data. The signal conditioning circuit is used for amplification, filtering, and analog-to-digital conversion of the analog signal output by the conductivity electrode 21 and the electrical signal output by the gas sensor 33. The power management module is used to provide stable and reliable operating voltage for each detection unit, such as the conductivity electrode 21, the miniature camera 31, the gas sensor 33, and the temperature sensor.

[0077] To further reduce the impact of electromagnetic interference generated during drilling on weak detection signals, a metal shield can be installed on the outside of the control circuit board 5 for local electromagnetic shielding, and a stable reference ground potential can be formed with the drill bit body 1 through structural grounding, thereby ensuring the accuracy and stability of signal acquisition and processing.

[0078] The multi-source detection signals, collected, processed, and converted by the control circuit board 5, need to be transmitted upwards to the upper-level drill pipe and finally delivered to the ground detection system. For this purpose, a metal conduit 6 is also provided inside the drill bit body 1. The metal conduit 6 is continuously arranged along the axial direction of the drill bit body 1 to accommodate the detection signal lines and power supply cables.

[0079] In a preferred embodiment, the metal conduit 6 is made of stainless steel. A multi-core shielded cable is threaded through the inner side of the metal conduit 6, and the shielding layer of the multi-core shielded cable is electrically connected to the metal conduit 6 to form an integral shielded channel, thereby effectively improving the anti-interference capability of the signal during transmission. The outer side of the metal conduit 6 is covered with a wear-resistant insulating material, such as a polyurethane insulation layer. The polyurethane insulation layer is used to prevent electrical short circuits between the metal conduit 6 and the drill bit body 1, and at the same time, it provides mechanical protection for the internal cables, preventing wear or damage to the cables under drilling vibration and impact conditions. The metal conduit 6 is connected to adjacent structures at both axial ends through sealed joints to prevent mud, water, or fine particles from entering the conduit, thereby ensuring the stability and reliability of the detection signal during long-distance transmission.

[0080] To accommodate the drilling method where the drilling vehicle needs to connect drill rods section by section and continuously deepen the borehole during operation, a signal quick-connect connector 7 is used to detachably connect the upper end of the drill bit to the upper drill rod. The signal quick-connect connector 7 is located at the tail end of the drill bit body 1. The structural design of the signal quick-connect connector 7 is used to achieve rapid connection of detection signals while realizing the mechanical connection between the drill bit and the drill rod, thereby ensuring that the detection signals can be continuously and stably transmitted to the ground detection system at different drilling depths.

[0081] Specifically, the signal quick-connect connector 7 adopts a coaxial multi-core electrical connection structure. The outer shell of the signal quick-connect connector 7 is made of stainless steel, enabling it to withstand axial tensile force, vibration impact, and torsional loads during drilling operations. Internally, the signal quick-connect connector 7 has multiple sets of electrical contact pins made of gold-plated copper alloy to reduce contact resistance and improve conductivity stability in humid, high-mud-content environments. Each pin corresponds to the conductivity detection signal, the gas sensor 33 signal, the camera data signal, and the common power supply and grounding channel, thereby achieving integrated connection for synchronous transmission and power supply of multi-source detection signals.

[0082] More specifically, the signal quick-connect connector 7 adopts an anti-misalignment structure design, with a positioning keyway at the plug end, ensuring that the signal quick-connect connector 7 can only be plugged in according to a predetermined direction, avoiding pin misalignment or damage due to incorrect rotation direction. After the connector is plugged in, a self-locking structure is used to prevent loosening during drilling vibration or drill rod rotation.

[0083] To adapt to the high water content of dam soil and mud environment, the signal quick-connect connector 7 is equipped with multiple sealing structures on the outside, such as wear-resistant rubber sealing rings at the insertion part, to prevent water, mud and fine particles from entering the connector, thereby ensuring the long-term reliability of the electrical connection.

[0084] Understandably, the upper-level drill pipe that mates with the signal quick-connect connector 7 is a component used by the cone drilling vehicle to transmit drilling power deep into the formation. The upper-level drill pipe is typically made of high-strength alloy steel tubing, and its interior has an axially extending cavity. This cavity not only accommodates signal transmission cables and grouting pipes extending from the drill bit body 1, but also provides a physical channel for the upward and downward transmission of multi-source detection signals and repair materials. Both ends of the upper-level drill pipe are equipped with mechanical connection structures, such as threaded or pin-type connectors, that match the signal quick-connect connector 7, to achieve quick and reliable connection with the drill bit body 1 and subsequent extended drill pipes.

[0085] In actual operation, as the depth of the cone drilling increases, multiple upper-level drill rods are connected in sequence by connecting end to end. Each time an upper-level drill rod is connected, the internal signal transmission cable and grouting pipeline are also connected synchronously through the corresponding quick-connect structure, thereby ensuring that the real-time transmission of detection signals and the continuous delivery of repair materials are not affected during the continuous drilling process.

[0086] In addition, the outer wall of the upper drill pipe can be equipped with depth markings or a transmission structure that works in conjunction with the feed drive mechanism of the cone drilling vehicle, so that the control system can accurately grasp the current position of the drill bit and provide a position reference for precise grouting based on the target position identified by the multi-source information acquisition component 3.

[0087] The following section provides a detailed explanation of the usage process of the automated detection and grouting repair cone drill bit for dam cone drilling vehicles, based on the specific structure described above.

[0088] Before the taper drilling operation begins, the taper drill bit is first connected to the first upper-level drill pipe via the signal quick-connect connector 7 at its tail end. During the connection process, the positioning keyway on the signal quick-connect connector 7 aligns with the corresponding structure at the lower end of the upper-level drill pipe, ensuring that the two can only be inserted in the predetermined direction, thereby protecting the internal electrical contact pins from damage. Once the mechanical connection structure is fully locked, the multiple sets of electrical contact pins inside the signal quick-connect connector 7 synchronously complete the conduction with the corresponding electrical connector inside the upper-level drill pipe, realizing the mechanical connection and synchronous electrical signal connection between the drill bit body 1 and the upper-level drill pipe. Subsequently, the upper-level drill pipe is installed on the drilling drive unit of the taper drilling vehicle, and the injection channel 42 of the repair component 4 is connected to the grouting pump and repair material storage tank on the taper drilling vehicle via a high-pressure hose. At this point, the equipment preparation work is completed.

[0089] The cone drilling vehicle is started, driving the upper drill rod and drill bit body 1 into the dam soil via rotary drilling or static pressure penetration. During the entry of the drill bit body 1, the electrical detection component 2, located at the front drilling structure 11, begins real-time operation. The conductivity electrode 21 maintains direct contact with the surrounding soil, continuously collecting the conductivity parameters of the strata. These conductivity parameters are transmitted to the control circuit board 5 inside the drill bit body 1 via electrode leads. Simultaneously, the multi-source information acquisition component 3, located in the middle of the drill bit body 1, is activated. The miniature camera 31 of the visual acquisition unit, aided by a ring-shaped supplementary light source, continuously captures images of the surrounding soil structure, obtaining intuitive image information. The gas sensor 33 of the gas acquisition unit, through the gas sampling window 34 and gas sampling film 35, collects in real-time the concentration of characteristic gases related to the activity of termites and other dam- ... The aforementioned visual image information, gas concentration signal, and temperature change signal are also transmitted to the control circuit board 5 in real time.

[0090] After receiving conductivity parameters and multiple signals from the multi-source information acquisition component 3, the control circuit board 5 amplifies, filters, and performs analog-to-digital conversion on these raw signals through its internally integrated signal conditioning circuit. The main control processing chip then performs timing control and data integration, packaging the data into a unified data stream. This data stream is transmitted upwards via a multi-core shielded cable within the metal conduit 6, sequentially passing through the signal quick-connect connector 7 at the tail end of the drill bit body 1 and the signal transmission channel inside the upper drill pipe, ultimately reaching the ground detection system and being displayed in real-time on the operating interface.

[0091] As drilling continues, ground operators or automated analysis systems make comprehensive judgments based on real-time multi-source information. When the drill bit advances to a certain depth, if the conductivity parameter shows abnormal fluctuations, and the image of the miniature camera 31 shows an image resembling a nest cavity, the gas sensor 33 detects a significant increase in carbon dioxide concentration, and the temperature sensor captures a local temperature anomaly, then it can be comprehensively determined that this location is the core area of ​​the dam-damming animal's activity or the target location of the hidden cavity.

[0092] After confirming the target location, ground operators issue a grouting repair command. The grouting pump on the cone drilling vehicle starts, pumping pre-prepared repair material, such as a high-molecular polyurethane grout mixed with termite control agent, into the grouting pipeline inside the upper drill pipe through a high-pressure hose at a set pressure. The repair material travels down the grouting pipeline, passing through the signal quick-connect connector 7 and the injection sub 41, and enters the injection channel 42. When the repair material reaches the injection hole 43 on the side wall of the injection sub 41, the injection pressure acts on the diaphragm check valve of the one-way control valve 44, opening the valve diaphragm. The repair material is then released directionally through the injection hole 43 into the target location in the strata surrounding the drill bit, filling the cavity and permeating into the surrounding soil. When the grouting volume or grouting pressure reaches the preset value, the grouting pump stops working, the injection pressure is released, and the diaphragm check valve automatically resets and closes under its own elasticity and the strata pressure, effectively preventing sediment or groundwater from flowing back into the injection channel 42. Throughout the grouting process, due to the isolation and sealing structure 45 between the injection sub 41 and the drill bit body 1, the high-pressure repair material is strictly blocked from the lower detection area, and will not cause any pollution or damage to precision detection components such as the conductivity electrode 21, the miniature camera 31, the gas sensor 33, and the temperature sensor.

[0093] After completing the grouting repair at the current target location, the cone drilling vehicle can continue to drive the drill bit to advance into deeper strata, repeating the above process of drilling, real-time detection, information transmission, comprehensive identification and precise grouting.

[0094] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An automated detection and grouting repair cone drill bit for dam cone drilling vehicles, characterized in that, include: The drill bit body (1) has a drilling structure (11) at its front end. An electrical detection component (2) is installed on the drilling structure (11) and is used to collect formation electrical parameters in real time during the drilling process of the drill bit body (1), wherein the formation electrical parameters include electrical conductivity parameters; A multi-source information acquisition component (3) is installed on the drill bit body (1). The multi-source information acquisition component (3) is used to collect biological activity characteristic information in the formation in real time during the drilling process of the drill bit body (1). Repair component (4) is disposed on the drill bit body (1). The repair component (4) is signal connected to the multi-source information acquisition component (3). The repair component (4) can release repair material to the target location based on the biological activity characteristic information.

2. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 1, characterized in that, The electrical detection component (2) includes at least one conductivity electrode (21), which is disposed in the drilling structure (11) and is used to contact the formation soil and collect the conductivity parameters during the drilling process of the drill bit body (1). An insulating isolation structure (22) is provided between the conductivity electrode (21) and the drill bit body (1), and the insulating isolation structure (22) is used to electrically isolate the conductivity electrode (21) from the drill bit body (1).

3. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 2, characterized in that, The insulating structure (22) includes: At least two insulating blocks (221) are distributed along the axial direction and are embedded inside the drilling structure (11) to fix and support the conductivity electrode (21). An insulating section (222) is disposed between the conductivity electrode (21) and the drill bit body (1) to isolate the detection area where the conductivity electrode (21) is located from the metal structure of the drill bit body (1).

4. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 1, characterized in that, The multi-source information acquisition component (3) includes: A visual acquisition unit is set on the drill bit body (1) to acquire image information of the geological structure around the borehole; A gas acquisition unit is installed on the drill bit body (1) to acquire characteristic gases related to biological activity in the strata surrounding the borehole and generate gas concentration signals; A temperature acquisition unit is installed on the drill bit body (1) to acquire soil temperature changes related to biological activity in the strata surrounding the borehole and generate temperature change signals.

5. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 4, characterized in that, The visual acquisition unit includes a miniature camera (31), and a protective window (32) is provided at the front end of the miniature camera (31). The outer surface of the protective window (32) is flush with or concave to the outer wall of the drill bit body (1). A supplementary light source is provided on the outer periphery of the miniature camera (31).

6. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 4, characterized in that, The gas collection unit includes a gas sensor (33) for detecting the concentration of the characteristic gas; the side wall of the drill bit body (1) is provided with a gas collection window (34) facing the detection end of the gas sensor (33), and the gas collection window (34) is covered with a gas collection film (35), which allows gas molecules to pass through and blocks liquid water and solid particles from entering; a protective net is provided on the outside of the gas collection window (34), which is used to prevent large particles from directly contacting the gas collection film (35).

7. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 1, characterized in that, The repair component (4) includes: Injection sub (41), which is coaxially connected to the tail end of the drill body (1); An injection channel (42) extends axially along the injection section (41) for communication with an external grouting system; At least one injection hole (43) is provided on the side wall of the injection subsection (41), the injection hole (43) is connected to the injection channel (42) and is used to release repair material to the target location; A one-way control valve (44) is provided in the injection hole (43) for opening under injection pressure to release the repair material and automatically closing after injection stops to prevent backflow of formation material.

8. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 7, characterized in that, An isolation sealing structure (45) is provided between the injection sub (41) and the drill bit body (1) to physically isolate the injection channel (42) from the detection area where the multi-source information acquisition component (3) is located.

9. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 1, characterized in that, Also includes: The control circuit board (5) is located inside the drill bit body (1). The control circuit board (5) is electrically connected to the electrical detection component (2) and the multi-source information acquisition component (3) respectively, and is used to collect, process and convert the acquired multi-source signals. A metal conduit (6) is disposed inside the drill bit body (1) and arranged along the axial direction of the drill bit body (1). The metal conduit (6) is electrically connected to the control circuit board (5) and is used to transmit the processed multi-source signal to the upper drill pipe direction.

10. The automated detection and grouting repair cone drill bit for dam cone drilling vehicles according to claim 9, characterized in that, It also includes a signal quick connector (7), which is located at the tail end of the drill bit body (1). The signal quick connector (7) has a connection structure for mechanical connection with the upper drill rod and a multi-core electrical contact pin for electrical connection with the metal conduit (6) to realize the mechanical connection and electrical signal synchronous docking between the drill bit body (1) and the upper drill rod.

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