Tunnel construction drilling mechanism

Abstract

The utility model relates to a tunnel construction technology field especially relates to a kind of tunnel construction drilling mechanism, including support base, drill bit base, drilling drill bit and induction drill bit, drill bit base is provided in support base upper end, drilling drill bit is provided in drill bit base inside, induction drill bit is provided in the inside of drilling drill bit;Drilling drill bit is movably installed in drill bit base inside, and drilling drill bit is hollow structure, and induction drill bit is movably installed in the inside of drilling drill bit, contact head is provided in the front end of induction drill bit, and the edge of contact head is zigzag, and contact head and drilling drill bit front end are in same vertical position. In the utility model, drilling drill bit provides space for mechanical linkage, and the zigzag design of contact head enhances the mechanical sensitivity of induction drill bit to formation change, ensures that the resistance change is transmitted to induction drill bit, and by capturing the mutation signal of this rotating resistance, indirect induction to the front end of drill bit Real-time formation change can be realized, solve the problem of conventional inductor failure under high temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of tunnel construction technology, and in particular to a tunnel construction drilling mechanism. Background Technology

[0002] In the preparation stage of tunnel construction, drilling is the primary step, and its core purpose is to provide accurate geological data for subsequent construction. However, when exploring different terrains in advance, many complex problems are often encountered.

[0003] During drilling operations in tunnel construction, the drill bit needs to continuously cut and drill into the strata. During this process, intense friction generates a large amount of heat, causing the drill bit tip to remain at a high temperature. This high-temperature environment directly hinders the installation of sensors. Conventional sensing elements cannot withstand prolonged exposure to high temperatures, and are prone to problems such as circuit aging and component failure, making it impossible to stably fix them to the drill bit tip.

[0004] In practical use, this results in the inability to detect real-time changes at the drill bit tip immediately. When the drill bit encounters hard rock and vibrates violently, or deviates when it comes into contact with soft strata, there is a lack of immediate sensing feedback. Utility Model Content

[0005] In view of the technical problems existing in the background art, the utility model provides a tunnel construction drilling mechanism, which solves the problem mentioned in the background art that when the drill bit encounters hard rock and causes violent vibration, or when it deviates when it comes into contact with soft strata, there is a lack of real-time sensing feedback, which makes it impossible to sense the real-time changes at the front end of the drill bit in the first time.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A tunnel construction drilling mechanism includes a support base, a drill bit base, a drilling bit, and an induction drill bit. The drill bit base is located at the upper end of the support base, and the drilling bit is located inside the drill bit base. The induction drill bit is located inside the drilling bit. The drilling bit is movably installed inside the drill bit base and has a hollow structure. The induction drill bit is movably installed inside the drilling bit. The induction drill bit has a contact head at its front end, and the edge of the contact head is serrated. The contact head and the front end of the drilling bit are at the same vertical position.

[0008] Preferably, a first transmission rod is installed at the rear end of the drill bit base, the first transmission rod is connected to the drilling bit, and a second transmission rod is provided inside the first transmission rod, the second transmission rod is connected to the induction drill bit.

[0009] Preferably, a straightening bracket is fixed to the front end of the drill bit base, and the straightening bracket is installed on the outside of the drilling bit.

[0010] Preferably, the support base is provided with slide rails on both sides, and the drill bit base is provided with sliders at the lower ends of both sides, and the drill bit base is slidably installed in the slide rails by the sliders.

[0011] Preferably, the support base has a positioning rail fixed in the middle, and the drill bit base has a positioning groove at the lower end, with the positioning rail and the positioning groove corresponding to each other.

[0012] Preferably, the lower end of the support base is fixed with mounting interfaces on both sides.

[0013] This utility model has the following advantages and beneficial effects:

[0014] In this utility model:

[0015] The drilling bit provides space for mechanical linkage, internally housing the induction drill bit and allowing it to rotate freely; the serrated design of the contact head enhances the mechanical sensitivity of the induction drill bit to changes in the formation, ensuring that the most accurate resistance changes are transmitted to the induction drill bit. By capturing the sudden change signal of this rotational resistance, indirect sensing of real-time formation changes at the drill bit tip can be achieved, solving the problem of conventional sensors failing in high-temperature environments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a simulated rainfall device proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of a partial rear structure of a simulated rainfall device proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of a partial front-end structure of a simulated rainfall device proposed in this utility model;

[0019] Figure 4 This is a partial cross-sectional structural diagram of a simulated rainfall device proposed in this utility model.

[0020] Reference numerals: 1-Support base, 11-Slide rail, 12-Mounting interface, 13-Positioning rail, 2-Drill bit base, 21-Slider, 22-Positioning groove, 3-Straightening bracket, 4-Drilling bit, 5-Induction drill bit, 51-Contact head, 6-First transmission rod, 7-Second transmission rod. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Example

[0024] like Figures 1-4 As shown, a tunnel construction drilling mechanism includes a support base 1, a drill bit base 2, a drilling bit 4, and an induction drill bit 5. The drill bit base 2 is provided on the upper end of the support base 1, the drilling bit 4 is provided inside the drill bit base 2, and the induction drill bit 5 is provided inside the drilling bit 4. The drilling bit 4 is movably installed inside the drill bit base 2. The drilling bit 4 has a hollow structure. The induction drill bit 5 is movably installed inside the drilling bit 4. The front end of the induction drill bit 5 is provided with a contact head 51. The edge of the contact head 51 is serrated, and the contact head 51 is at the same vertical position as the front end of the drilling bit 4.

[0025] During use, the drilling bit 4 provides space for mechanical linkage, internally accommodating the induction drill bit 5 and allowing it to rotate freely; the serrated design of the contact head 51 enhances the mechanical sensitivity of the induction drill bit 5 to changes in the formation, ensuring that the most realistic resistance changes are transmitted to the induction drill bit 5. By capturing the sudden change signal of this rotational resistance, indirect sensing of real-time formation changes at the drill bit tip can be achieved, solving the problem of conventional sensors failing in high-temperature environments.

[0026] like Figures 1-4 As shown, a first transmission rod 6 is installed at the rear end of the drill bit base 2. The first transmission rod 6 is connected to the drill bit 4. A second transmission rod 7 is installed inside the first transmission rod 6. The second transmission rod 7 is connected to the induction drill bit 5. The first transmission rod 6 transmits the driving force for drilling operations. Its rear end is stably connected to the drill bit base 2, and its front end is directly connected to the drill bit 4. By receiving the rotational torque from the external power source, it transmits the power to the drill bit 4 and provides a closed and stable installation space for the internal second transmission rod 7. Its rigid support prevents the second transmission rod 7 from radially shifting during high-speed rotation. Because the front end of the induction drill bit 5 has an irregular groove structure, its contact resistance with the formation changes with the formation properties during rotation. This change in resistance is converted into a reverse torque on the second transmission rod 7. The second transmission rod 7 captures the sudden change signal of this reverse torque through a connected torque sensing unit, converting the real-time change of the formation contact resistance into a recognizable electrical or mechanical signal, thereby achieving indirect detection of the formation state at the front end of the induction drill bit 5.

[0027] like Figures 1-4As shown, a straightening bracket 3 is fixed to the front end of the drill bit base 2. The straightening bracket 3 is installed on the outside of the drilling bit 4. The straightening bracket 3 provides circumferential constraint and radial support for the drill bit. When the drill bit contacts soft strata and may deviate, or encounters hard rock blocks and causes violent vibration, the straightening bracket 3 can use its own rigid structure to limit the radial displacement of the drilling bit 4, reduce the shaking or trajectory deviation of the drill bit caused by uneven strata, and ensure that the drilling direction is always consistent with the preset drilling path.

[0028] like Figures 1-4 As shown, slide rails 11 are provided on both sides of the support base 1, and sliders 21 are provided at the lower ends of both sides of the drill bit base 2. The drill bit base 2 is slidably installed in the slide rails 11 through the sliders 21. Through the sliding cooperation structure of the slide rails 11 and the sliders 21, the support base 1 and the drill bit base 2 form a dynamic connection system that combines guiding accuracy, buffering capacity and structural stability, providing a basic guarantee for the smooth progress of drilling operations and the reliable implementation of sensing detection.

[0029] like Figures 1-4 As shown, a positioning rail 13 is fixed in the middle of the support base 1, and a positioning groove 22 is opened at the lower end of the drill bit base 2. The positioning rail 13 and the positioning groove 22 are positioned correspondingly. Through the precise engagement of the positioning rail 13 and the positioning groove 22, the support base 1 and the drill bit base 2 form a multi-constraint system. While ensuring the flexibility of sliding adjustment, it greatly improves the overall positioning accuracy and anti-interference capability of the drilling device. The support base 1 has installation interfaces 12 fixed on both sides of the lower end. By connecting with other equipment structures of the tunnel construction equipment, the entire drilling mechanism is stably fixed in the preset working position. Through multiple functions such as fixed support, positioning calibration, and load distribution, it provides installation guarantee for the stable operation, precise operation and flexible adaptation of the entire drilling device.

[0030] When using the tunnel drilling mechanism, firstly, the support base 1 is connected to the corresponding structure of the tunnel construction equipment through the installation interface 12. The position of the drill bit base 2 is adjusted according to the preset drilling path. The sliders 21 on both sides of the drill bit base 2 are driven to slide along the slide rails 11 of the support base 1, so that the axis of the drilling bit 4 is aligned with the preset path. During the sliding process, the positioning rail 13 is precisely embedded in the positioning groove 22, and the lateral displacement of the drill bit base 2 is limited by multiple constraints. After starting, the first transmission rod 6 continuously outputs rotational torque, and the sensing drill bit 5 rotates synchronously with the drilling bit 4. The resistance changes with the stratum properties, forming a reverse torque acting on the second transmission rod 7. The torque sensing unit captures the sudden change signal of the reverse torque in real time and converts it into an electrical signal and transmits it to the control system. After drilling to the preset depth, the power source is turned off and the sliders 21 are released from locking, thus completing the use of the tunnel drilling mechanism.

[0031] This is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tunnel construction drilling mechanism, comprising a support base (1), a drill bit base (2), a drilling bit (4), and an induction drill bit (5), characterized in that: The upper end of the support base (1) is provided with a drill bit base (2), the drill bit base (2) is provided with a drilling bit (4), and the drilling bit (4) is provided with an induction drill bit (5). The drilling bit (4) is movably installed inside the drill bit base (2). The front end of the induction drill bit (5) is provided with a contact head (51). The edge of the contact head (51) is serrated. The contact head (51) and the front end of the drilling bit (4) are at the same vertical position.

2. The tunnel construction drilling mechanism according to claim 1, characterized in that: The drilling bit (4) has a hollow structure, and an induction drill bit (5) is movably installed inside the drilling bit (4).

3. The tunnel construction drilling mechanism according to claim 1, characterized in that: The drill bit base (2) is equipped with a first transmission rod (6) at its rear end. The first transmission rod (6) is connected to the drilling bit (4). A second transmission rod (7) is provided inside the first transmission rod (6). The second transmission rod (7) is connected to the induction drill bit (5).

4. The tunnel construction drilling mechanism according to claim 1, characterized in that: The drill bit base (2) is fixed with a straightening bracket (3) at the front end, and the straightening bracket (3) is installed on the outside of the drilling bit (4).

5. A tunnel construction drilling mechanism according to claim 1, characterized in that: The support base (1) is provided with slide rails (11) on both sides, and the drill bit base (2) is provided with sliders (21) at the lower ends of both sides. The drill bit base (2) is slidably installed in the slide rails (11) by the sliders (21).

6. The tunnel construction drilling mechanism according to claim 1, characterized in that: The support base (1) has a positioning rail (13) fixed in the middle, and the drill bit base (2) has a positioning groove (22) at the lower end. The positioning rail (13) and the positioning groove (22) are positioned opposite each other.

7. A tunnel construction drilling mechanism according to claim 1, characterized in that: The support base (1) has mounting interfaces (12) fixed on both sides of its lower end.

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