A drilling and coring structure, device and method for road and bridge tunnel construction

Abstract

The application relates to the technical field of drilling coring, and discloses a drilling coring structure, equipment and method for road bridge tunnel construction, wherein the drilling coring structure comprises a first power device, a drill rod connected with the first power device, a sliding sleeve sleeved on the drill rod, a fixing cylinder which is integrally sleeved outside the sliding sleeve and forms a backflow cavity between the fixing cylinder, the sliding sleeve and the drill rod, a liquid discharge port arranged on the side wall of the fixing cylinder, an annular half pipe sleeved outside the fixing cylinder, the annular half pipe being connected with a slurry discharge pump through a liquid discharge pipeline, a spraying water ring fixed in the inside of the fixing cylinder, the spraying water ring comprising a ring body, a second water inlet hole arranged on one side of the ring body and corresponding to a first water inlet hole, the second water inlet hole being connected with a water inlet pipeline, and a spray head arranged on the end face of the spraying water ring facing the vault, and a second power device. The application is suitable for drilling coring of the vault of a tunnel, can realize collection and discharge of backflow wastewater, and can avoid that cooling water directly flows to an electrical system, thereby causing damage to equipment.

Description

Technical Field

[0001] This invention relates to the field of core drilling technology, and in particular to a core drilling structure, equipment and method for road and bridge tunnel construction. Background Technology

[0002] Existing core drilling is mostly used on the ground or in tunnel excavation sections. For example, the tunnel core drilling machine in application 201822067904.2 mainly consists of a walking mechanism, chassis, engine, driver's cab, rotary telescopic mechanism, drilling mechanism, telescopic seat, and fixed seat. The walking mechanism is mainly used for walking on dirt roads. The chassis is set on the walking mechanism. The engine, driver's cab, telescopic seat, and fixed seat are all set on the chassis. The drilling mechanism is set on the rotary telescopic mechanism.

[0003] While the aforementioned existing technologies can perform core drilling, they are only applicable to ground or tunnel excavation sections. For core drilling in tunnel arches, the backflow of cooling water under gravity can damage the electrical system. Therefore, there is currently a lack of equipment capable of core drilling in tunnel arches. Summary of the Invention

[0004] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a drilling core sampling structure, equipment and method for road and bridge tunnel construction. The present invention is not only applicable to drilling core sampling in the tunnel arch, but also enables the collection and discharge of backflow wastewater, thereby avoiding the direct flow of cooling water into the electrical system and causing equipment damage.

[0005] On one hand, the present invention provides a core drilling structure for road and bridge tunnel construction, the core drilling structure comprising: First power unit; The drill pipe is connected to the first power device, which drives the drill pipe to rotate. A sliding sleeve is fitted onto the connection end between the drill pipe and the first power unit. Both ends of the sliding sleeve are rotatably connected to the drill pipe via rotating sealed bearings. A fixed cylinder is integrally fitted onto the outside of the sliding sleeve. One end of the fixed cylinder is slidably connected to the sliding sleeve via a sliding sealing bearing. A reflux cavity is formed between the fixed cylinder, the sliding sleeve, and the drill rod to receive refluxed liquid. A drain port is provided on the side wall of the fixed cylinder near the sliding sealing bearing. An annular half-pipe is fitted on the outside of the fixed cylinder at the position corresponding to the drain port. The annular half-pipe is connected to the slurry pump via a drain pipe. A first water inlet is provided at the end of the fixed cylinder away from the sliding sealing bearing. The spray water ring is fixedly installed inside the fixed cylinder. The spray water ring includes a ring body, which is hollow inside. A second water inlet is opened on one side of the ring corresponding to the first water inlet. The second water inlet is connected to a water inlet pipe. The water inlet pipe passes through the first water inlet and is connected to an external cooling water pump. A nozzle is provided on the end face of the spray water ring facing the arch. The second power unit drives the drill rod and the sliding sleeve to move linearly relative to the fixed cylinder along its axial direction.

[0006] This invention is applicable to core drilling in tunnel arches. A first power unit drives the drill rod to rotate, and a second power unit controls the linear feed to drill and core the arch. During this process, a cooling water pump pumps cooling water into a spray ring, which sprays cooling water onto the drill rod through nozzles to cool it. The waste liquid generated flows back to the bottom of the return chamber under gravity and overflows into the annular half-pipe through the drain port. Finally, it is discharged by the slurry pump. This invention achieves the collection and discharge of cooling water that flows back due to gravity during arch operations, reducing damage to the electrical system caused by liquid infiltration. By adopting a combination structure of rotating sealed bearings and sliding sealed bearings, the sealing performance of the return chamber is improved while allowing axial displacement and circumferential rotation of the drill rod.

[0007] Furthermore, an air intake chamber is formed between the sliding sleeve and the drill rod, and an air intake hole communicating with the air intake chamber is opened on the side wall of the sliding sleeve. The air intake hole is connected to a high-pressure air source through an air intake pipe. The portion of the drill rod located in the air intake chamber has an air intake slot, through which the air intake chamber is connected to the interior of the drill rod. A limiting ring is provided inside the drill rod, and the limiting ring is located on the side of the air intake slot away from the first power device.

[0008] By activating the high-pressure air source, pressurized air enters the drill pipe sequentially through the air inlet pipe, air inlet chamber, and air inlet slot. The pressurized gas acts on the end of the core column, gradually pushing the core column out. This improves the core integrity rate by avoiding core breakage caused by traditional mechanical ejection. By setting a limiting ring inside the drill pipe, a mechanical blocking surface can be formed to prevent the core column from sliding in the air inlet slot area and affecting the core column ejection effect. At the same time, by restricting the end of the core column through the limiting ring, the high-pressure gas can be concentrated on the end face of the core column to form a unidirectional thrust, improving the gas pressure ejection efficiency.

[0009] On the other hand, the present invention also provides a core drilling device for road and bridge tunnel construction. The core drilling device includes the aforementioned core drilling structure. The core drilling device further includes a lifting structure. The core drilling structure is installed on the lifting structure, and the lifting structure drives the core drilling structure to move linearly along the axis of the drill rod.

[0010] The core drilling structure is raised by a lifting mechanism so that it is pressed tightly against the arch, thereby reducing the problem of "not being able to press tightly or reach" that occurs when using the core drilling structure directly by hand in the traditional way.

[0011] Furthermore, the core drilling equipment also includes an elevation angle adjustment structure, and the lifting structure is fixed on the elevation angle adjustment structure. The elevation angle adjustment structure includes: Motion module; The movable block is fixedly installed on the lifting structure, and the movable block is driven to rotate by the motion module.

[0012] Furthermore, the motion module includes: Fixing part; The fourth power unit is fixedly installed on one side of the fixed part; The second slider is slidably engaged with the fixed part and is driven to move linearly by the fourth power device. A limit groove is provided on the side of the second slider. A rotating connecting block, one end of which is rotatably connected to the fixed part, and the other end of which is provided with a pulley near the fixed part, the pulley being embedded in a limiting groove; A rotating block is mounted on the connecting shaft between the rotating connecting block and the fixed part, and is fixedly connected to the movable block.

[0013] The second slider is driven to move linearly by the fourth power device, which in turn drives the drive pulley to move along the track of the limit groove, and drives the rotating connecting block to rotate, thereby realizing the adjustment of the elevation angle of the core drilling structure and meeting the core drilling requirements of different arch curvatures.

[0014] Furthermore, the motion module also includes limiters, and there are two sets of limiters. The two sets of limiters are arranged opposite to each other at both ends of the fixed part, and the second set of limiters is arranged on the motion trajectory of the second slider.

[0015] Two sets of limiters form a barrier at both ends of the fixed part, controlling the stroke error of the second slider within a preset range and avoiding mechanical interference caused by overshoot.

[0016] Furthermore, the core drilling equipment also includes a pitch structure, on which the aforementioned pitch angle adjustment structure is fixedly mounted. The pitch structure includes: Base; A pitch seat, one side of which is pivotally connected to a base; The fifth power unit drives the pitch seat to rotate around its pivot axis with respect to the base.

[0017] After coring is completed, the elevation mount is automatically rotated by the fifth power unit to tilt the core drilling structure, reducing the overall height of the equipment and effectively lowering the risk of top collision during movement inside the tunnel. Furthermore, the pitch structure also includes: The first limiting post is located on the pitch seat away from the side where it is pivotally connected to the base; The second limiting post is fixed on the base, corresponding to the first limiting post; A fastening plate, which is rotatably mounted on the end of the second limiting post; The sixth power device drives the fastening plate to rotate so that the fastening plate is fastened to the end of the first limiting post.

[0018] The sixth power unit drives the fastening plate to form a mechanical interlock structure with the first limiting post, which improves the impact load that the equipment can withstand during operation and reduces the displacement of the equipment under vibration conditions.

[0019] Furthermore, the core drilling equipment also includes a movable structure, on which the pitching structure is fixedly mounted, and the movable structure drives the entire core drilling equipment to move on the ground.

[0020] On the other hand, the present invention also provides a method for coring during road and bridge tunnel construction, the method using the aforementioned coring equipment, the method comprising: S100: The moving structure drives the entire core drilling equipment into the tunnel and moves it to the preset core sampling point; S200: The fifth power unit drives the pitch seat to pivot until the end of the first limit post abuts against the end of the second limit post. Then the sixth power unit drives the fastening plate to rotate so that the fastening plate fastens the end of the first limit post. S300: The fourth power unit drives the second slider to slide, thereby driving the rotating connecting block to rotate around its pivot axis with the fixed part, thereby driving the rotating block to rotate, and then driving the movable block that is fixed to the rotating block to move, adjusting the elevation angle of the drilling core structure; S400: The lifting structure drives the overall linear movement of the core drilling structure to make the core drilling structure abut and fix against the arch. The first power device is started to drive the drill rod to rotate. The cooling water pump is started to pump water into the spray water ring and spray cooling water to the drilling point through the spray. S500: The second power unit starts, driving the drill rod to move linearly. The rotating drill rod feeds towards the core sampling point of the arch. After contacting the arch, the second power unit continues to drive the drill rod to move linearly in that direction. During the feeding process, the drill rod continuously rotates and cuts the arch until it reaches a preset depth. Then the second power unit stops working. After a preset time, the second power unit drives the drill rod to move linearly away from the drilling point until the drill rod completely leaves the drilling point. Then the first power unit stops working. S600: The lifting structure drives the drilling and coring structure to descend to the preset height, and the high-pressure air source is activated. Pressurized air enters the drill rod through the air inlet pipe, air inlet chamber and air inlet in sequence. The pressurized gas acts on the end of the core column and gradually pushes the core column out. The core column that has been pushed out is removed manually to complete the coring work at the current coring point. In step S500, when the drill rod is rotating and cutting the arch, cooling water is sprayed onto the drill rod to cool it down. During this process, the waste liquid generated flows along the return cavity to the bottom of the return cavity under the action of gravity and overflows from the drain port into the annular half-pipe. The slurry pump is started to pump out the waste liquid.

[0021] The present invention has the following advantages: This invention is applicable to core drilling in tunnel arches. A first power unit drives the drill rod to rotate, and a second power unit controls the linear feed to drill and core the arch. During this process, a cooling water pump pumps cooling water into a spray ring, which sprays cooling water onto the drill rod through nozzles to cool it. The waste liquid generated flows back to the bottom of the return chamber under gravity and overflows into the annular half-pipe through the drain port. Finally, it is discharged by the slurry pump. This invention achieves the collection and discharge of cooling water that flows back due to gravity during arch operations, reducing damage to the electrical system caused by liquid infiltration. By adopting a combination structure of rotating sealed bearings and sliding sealed bearings, the sealing performance of the return chamber is improved while allowing axial displacement and circumferential rotation of the drill rod. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a core drilling structure; Figure 2 yes Figure 1 A cross-sectional schematic diagram of the core drilling structure shown. Figure 3 yes Figure 2 A schematic diagram of the fixed cylinder in the drilling and coring structure shown; Figure 4 yes Figure 2 A schematic diagram of the sliding sleeve in the drilling and coring structure shown; Figure 5 yes Figure 1 A schematic diagram of the drill rod structure in the shown core drilling structure; Figure 6yes Figure 5 A magnified schematic diagram of a portion of the internal structure of the drill pipe shown. Figure 7 yes Figure 2 A schematic diagram of the spray water ring in the borehole coring structure shown; Figure 8 This is a schematic diagram of a core drilling equipment; Figure 9 yes Figure 8 A schematic diagram of the pitching structure in the core drilling equipment shown. Figure 10 yes Figure 9 A cross-sectional schematic diagram of the pitch structure shown; Figure 11 yes Figure 8 A schematic diagram of the lifting structure in the core drilling equipment shown. Figure 12 yes Figure 8 A schematic diagram of the elevation angle adjustment structure in the borehole coring equipment shown. Figure 13 yes Figure 12 A schematic diagram of the motion module in the elevation angle adjustment structure shown; Figure 14 yes Figure 13 An enlarged schematic diagram of local structure A in the motion module shown.

[0023] In the diagram: 100, Drilling and coring structure; 110, First power unit; 120, Fixing frame; 130, Slide; 131, Rubber ring; 140, Drill rod; 141, Air inlet; 150, Second power unit; 160, Fixing cylinder; 161, Drainage pipe; 162, Annular half-pipe; 163, Drainage port; 164, First water inlet; 170, Spray water ring; 171, Ring body; 172, Spray head; 173, Second water inlet; 180, Sliding sleeve; 181, Air inlet pipe; 182, Air inlet. 200. Lifting structure; 210. Frame; 220. Third power unit; 230. First slider; 300. Elevation adjustment structure; 310. Base; 320. Motion module; 321. Fourth power unit; 322. Second slider; 323. Limiter; 324. Fixing part; 325. Rotating connecting block; 326. Rotating block; 330. Movable block; 400. Pitch structure; 410. Pitch base; 411. First limiting post; 420. Base; 421. Second limiting post; 430. Fifth power unit; 440. Sixth power unit; 450. Fastening plate; 500. Moving structure. Detailed Implementation

[0024] The embodiments of this application 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 elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0025] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0026] As described in the background section, although the above-mentioned prior art can achieve core drilling, it is only for ground or tunnel excavation sections. For core drilling in the tunnel arch, the backflow of cooling water under gravity can damage the electrical system.

[0027] Example 1: Therefore, in order to solve the above-mentioned technical problems existing in the prior art, this embodiment provides a core drilling structure for road and bridge tunnel construction, such as... Figure 1 , Figure 2 As shown, the core drilling structure 100 includes: First power unit 110; Drill rod 140, which is connected to the first power device and is driven to rotate by the first power device; Slip sleeve 180 is fitted on the connection end between the drill pipe and the first power device. Both ends of the slip sleeve are rotatably connected to the drill pipe through rotating sealed bearings. A fixed cylinder 160 is integrally fitted onto the outside of the sliding sleeve. One end of the fixed cylinder is slidably connected to the sliding sleeve via a sliding sealed bearing. A reflux cavity is formed between the fixed cylinder, the sliding sleeve, and the drill pipe to receive refluxed liquid. Figure 3 As shown, a drain port 163 is provided on the side wall of the fixed cylinder near the sliding seal bearing. An annular half-pipe 162 is fitted on the outside of the fixed cylinder at the position corresponding to the drain port. The annular half-pipe is connected to the slurry pump through a drain pipe 161. A first water inlet hole 164 is provided at the end of the fixed cylinder away from the sliding seal bearing. The spray water ring 170 is integrally fixedly installed inside the fixed cylinder, such as... Figure 7As shown, the spray water ring includes a ring body 171, which is hollow inside. A second water inlet 173 is provided on one side of the ring corresponding to the first water inlet. The second water inlet is connected to a water inlet pipe, which passes through the first water inlet and is connected to an external cooling water pump. A nozzle 172 is provided on the end face of the spray water ring facing the arch. The second power unit 150 drives the drill rod and the sliding sleeve to move linearly relative to the fixed cylinder along its axial direction.

[0028] In this embodiment, the first power unit can be a servo motor, which directly drives the drill rod to rotate. The second power unit can be a hydraulic cylinder. Additionally, as... Figure 1 As shown, the core drilling structure may further include a fixed frame 120 and a slide 130. The slide and the fixed frame are in sliding engagement. The first power device is fixedly installed on the slide. The drill rod is rotatably installed on the slide. The hydraulic cylinder is installed on the fixed frame and is connected to the slide. The second power device drives the slide to move linearly to achieve linear feed of the drill rod. The fixed cylinder is fixedly installed on the fixed frame body. A rubber ring 131 is provided at one end of the fixed cylinder.

[0029] In this embodiment, during use, the core drilling structure is first aligned with and tightened at the core drilling point. At this time, the rubber ring contacts the arch. Due to the inherent characteristics of the rubber ring, it will deform to a certain extent according to the curvature of the arch under the tightening force, thus fitting the arch to the maximum extent. Then, the first power device is started, which drives the drill rod to rotate. At the same time, the cooling water pump and the slurry pump are started. The cooling water pump pumps cooling water into the spray water ring, which sprays the cooling water towards the core drilling point through the nozzles, forming a cooling radiation area. Then, the second power device is started, which drives the drill rod to feed towards the core drilling point, so that the drill rod passes through the cooling radiation area and contacts the arch. As the drill rod... With continuous feeding, the drill rod continuously rotates and cuts the arch. The heat generated by the cutting is continuously carried away by the heat exchange between the cooling water and the drill rod, reducing the rotational cutting temperature of the drill rod. Due to the obstruction of the fixed cylinder and the rubber ring, the liquid splashed onto the drill rod is restricted to the return cavity. At the same time, the liquid returning due to gravity flows along the return cavity to the bottom of the return cavity and overflows into the annular half-pipe through the drain port. Finally, it is discharged by the action of the slurry pump. When the feed reaches the preset depth, the second power unit stops working. After a preset time, the second power unit drives the drill rod to retract, completing the coring work at the current coring point.

[0030] This embodiment is applicable to core drilling in tunnel arches. It enables the collection and discharge of cooling water that flows back due to gravity during arch operations, reducing damage to the electrical system caused by liquid infiltration. By adopting a combination structure of rotating sealed bearings and sliding sealed bearings, the sealing performance of the return cavity is improved while allowing axial displacement and circumferential rotation of the drill rod.

[0031] like Figure 2 As shown, an air intake chamber is formed between the sliding sleeve and the drill pipe, such as... Figure 4 As shown, the side wall of the sliding sleeve is provided with an air inlet 182 that communicates with the air inlet chamber. The air inlet is connected to a high-pressure air source through an air inlet pipe 181. like Figure 5 As shown, the portion of the drill rod located in the air intake chamber has an air intake slot 141, through which the air intake chamber is connected to the interior of the drill rod, as shown. Figure 6 As shown, a limiting ring 142 is provided inside the drill pipe, and the limiting ring is located on the side of the air inlet away from the first power unit.

[0032] Specifically, after core sampling is completed, a high-pressure gas source can be activated to allow pressurized air to enter the drill pipe sequentially through the air inlet pipe, air inlet chamber, and air inlet slot. The pressurized gas acts on the end of the core column, gradually pushing the core column out, thus avoiding core breakage caused by traditional mechanical ejection and improving the core integrity rate. By setting a limiting ring inside the drill pipe, a mechanical blocking surface can be formed to prevent the core column from sliding in the air inlet slot area and affecting the core column ejection effect. At the same time, by restricting the end of the core column through the limiting ring, the high-pressure gas can be concentrated on the end face of the core column to form a unidirectional thrust, improving the gas pressure ejection efficiency.

[0033] Example 2: This embodiment provides a core drilling device for road and bridge tunnel construction based on the core drilling structure provided in Embodiment 1. The core drilling device includes the core drilling structure described in Embodiment 1, and further includes a lifting structure 200. The core drilling structure is installed on the lifting structure, and the lifting structure drives the core drilling structure to move linearly along the axis of the drill rod.

[0034] Specifically, such as Figure 11 As shown, the lifting structure may include: Frame 210; The third power unit 220 is mounted on the upright; The first slider 230 is slidably fitted on the stand. The sliding fit can be in the form of a slide rail-slider structure, a guide rod-slider structure, etc. The fixing clamp of the core drilling structure is fixedly connected to the first slider.

[0035] In this embodiment, the third power device can be a hydraulic cylinder, which drives the first slider to move linearly, thereby driving the overall linear movement of the core drilling structure.

[0036] In this embodiment, a lifting structure is used to raise the core drilling structure so that the core drilling structure is pressed tightly against the arch, thereby reducing the situation of "not being able to press tightly or reach" that occurs when the core drilling structure is used directly by humans in the traditional way.

[0037] In this embodiment, the core drilling equipment further includes an elevation angle adjustment structure 300, and the lifting structure is fixed on the elevation angle adjustment structure, such as... Figure 12 As shown, the elevation angle adjustment structure includes: Motion Module 320; Movable block 330, the lifting structure is fixedly installed on the movable block, and the movable block is driven to rotate by the motion module.

[0038] In addition, the elevation adjustment structure may also include a base 310, on which the motion module is fixedly mounted, and the movable block is rotatably engaged with the base.

[0039] like Figure 13 , Figure 14 As shown, the motion module includes: Fixing part 324, which is fixedly installed on the base; The fourth power unit 321 is fixedly installed on one side of the fixed part; The second slider 322 is slidably engaged with the fixed part and is driven to move linearly by the fourth power device. A limit groove 327 is provided on the side of the second slider. Rotary connecting block 325, one end of which is rotatably connected to the fixed part, and the other end of which is provided with a pulley 328 near the fixed part, the pulley being embedded in the limiting groove; Rotating block 326 is mounted on the connecting shaft between the rotating connecting block and the fixed part, and is fixedly connected to the movable block.

[0040] In this embodiment, the fourth power device can be a hydraulic cylinder, which directly drives the second slider to move. The second slider can slide in cooperation with the fixed part through a slide rail-slider structure, guide rod-slider structure, etc.

[0041] In this embodiment, the second slider 322 is driven to move linearly by the fourth power device, which drives the drive pulley 328 to move along the track of the limiting groove, and drives the rotating connecting block to rotate, thereby realizing the adjustment of the elevation angle of the core drilling structure and meeting the core drilling requirements of different arch curvatures.

[0042] In this embodiment, the motion module further includes a limiter 323. Two sets of limiters are provided, arranged opposite each other at both ends of the fixed part. Both sets of limiters are positioned on the motion trajectory of the second slider. The limiter can be a buffer cylinder.

[0043] Two sets of limiters form a block at both ends of the fixed part 324, controlling the stroke error of the second slider 322 within a preset range and avoiding mechanical interference caused by overshoot.

[0044] In addition, the core drilling equipment may also include a pitch structure 400, on which the aforementioned pitch angle adjustment structure is fixedly installed, such as... Figure 9 As shown, the pitch structure may include: Base 420; Pitch mount 410, one side of which is pivotally connected to the base; The fifth power unit 430 drives the pitch seat to rotate around its pivot axis with respect to the base.

[0045] After the fifth power unit drives the pitching seat to complete the core sampling, it automatically flips over to tilt the core sampling structure, reducing the overall height of the equipment and effectively reducing the risk of top collision when moving inside the tunnel.

[0046] In this embodiment, as Figure 9 , Figure 10 As shown, the pitch structure may further include: The first limiting post 411 is located on the pitch seat away from the pivot connection side with the base; The second limiting post 421 is fixed on the base corresponding to the first limiting post; Fastening plate 450, the fastening plate is rotatably mounted on the end of the second limiting post; The sixth power device 440 drives the fastening plate to rotate so that the fastening plate is fastened to the end of the first limiting post.

[0047] In this embodiment, the sixth power device drives the fastening plate to form a mechanical interlock structure with the first limiting post 411, which improves the impact load that the equipment can withstand during operation and reduces the displacement of the equipment under vibration conditions.

[0048] In this embodiment, both the fifth and sixth power devices can be hydraulic cylinders.

[0049] In addition, the core drilling equipment may also include a moving structure 500, on which the pitching structure is fixedly mounted, and the moving structure drives the entire core drilling equipment to move on the ground. The moving structure may be a tracked vehicle or a wheeled vehicle.

[0050] Example 3: This embodiment provides a core drilling method for road and bridge tunnel construction. The core drilling method uses the core drilling equipment described in Embodiment 2, and the core drilling method includes: S100: The moving structure drives the entire core drilling equipment into the tunnel and moves it to the preset core sampling point; S200: The fifth power unit drives the pitch seat to pivot until the end of the first limit post abuts against the end of the second limit post. Then the sixth power unit drives the fastening plate to rotate so that the fastening plate fastens the end of the first limit post. S300: The fourth power unit drives the second slider to slide, thereby driving the rotating connecting block to rotate around its pivot axis with the fixed part, thereby driving the rotating block to rotate, and then driving the movable block that is fixed to the rotating block to move, adjusting the elevation angle of the drilling core structure; S400: The lifting structure drives the overall linear movement of the core drilling structure to make the core drilling structure abut and fix against the arch. The first power device is started to drive the drill rod to rotate. The cooling water pump is started to pump water into the spray water ring and spray cooling water to the drilling point through the spray. S500: The second power unit starts, driving the drill rod to move linearly. The rotating drill rod feeds towards the core sampling point of the arch. After contacting the arch, the second power unit continues to drive the drill rod to move linearly in that direction. During the feeding process, the drill rod continuously rotates and cuts the arch until it reaches a preset depth. Then the second power unit stops working. After a preset time, the second power unit drives the drill rod to move linearly away from the drilling point until the drill rod completely leaves the drilling point. Then the first power unit stops working. S600: The lifting structure drives the drilling and coring structure to descend to the preset height, and the high-pressure air source is activated. Pressurized air enters the drill rod through the air inlet pipe, air inlet chamber and air inlet in sequence. The pressurized gas acts on the end of the core column and gradually pushes the core column out. The core column that has been pushed out is removed manually to complete the coring work at the current coring point. In step S500, when the drill rod is rotating and cutting the arch, cooling water is sprayed onto the drill rod to cool it down. During this process, the waste liquid generated flows along the return cavity to the bottom of the return cavity under the action of gravity and overflows from the drain port into the annular half-pipe. The slurry pump is started to pump out the waste liquid.

[0051] The above description of the disclosed embodiments enables those skilled in the art to make or use the 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A core drilling device for road and bridge tunnel construction, characterized in that, The core drilling equipment includes a core drilling structure; The core drilling structure includes: First power unit; The drill pipe is connected to the first power device, which drives the drill pipe to rotate. A sliding sleeve is fitted onto the connection end between the drill pipe and the first power unit. Both ends of the sliding sleeve are rotatably connected to the drill pipe via rotating sealed bearings. A fixed cylinder is integrally fitted onto the outside of the sliding sleeve. One end of the fixed cylinder is slidably connected to the sliding sleeve via a sliding sealing bearing. A reflux cavity is formed between the fixed cylinder, the sliding sleeve, and the drill rod to receive refluxed liquid. A drain port is provided on the side wall of the fixed cylinder near the sliding sealing bearing. An annular half-pipe is fitted on the outside of the fixed cylinder at the position corresponding to the drain port. The annular half-pipe is connected to the slurry pump via a drain pipe. A first water inlet is provided at the end of the fixed cylinder away from the sliding sealing bearing. The spray water ring is fixedly installed inside the fixed cylinder. The spray water ring includes a ring body, which is hollow inside. A second water inlet is opened on one side of the ring corresponding to the first water inlet. The second water inlet is connected to a water inlet pipe. The water inlet pipe passes through the first water inlet and is connected to an external cooling water pump. A nozzle is provided on the end face of the spray water ring facing the arch. The second power unit drives the drill pipe and the sliding sleeve to move linearly relative to the fixed cylinder along its axial direction. An air intake chamber is formed between the sliding sleeve and the drill rod. An air intake hole communicating with the air intake chamber is opened on the side wall of the sliding sleeve. The air intake hole is connected to a high-pressure air source through an air intake pipe. The portion of the drill rod located in the air intake chamber has an air intake slot, through which the air intake chamber is connected to the interior of the drill rod. A limiting ring is provided inside the drill rod, and the limiting ring is located on the side of the air intake slot away from the first power device. The core drilling equipment further includes a lifting structure, on which the core drilling structure is integrally mounted, and the core drilling structure is driven to move linearly along the axis of the drill rod through the lifting structure. The core drilling equipment further includes an elevation angle adjustment structure, and the lifting structure is fixed on the elevation angle adjustment structure. The elevation angle adjustment structure includes: Motion module; The movable block is fixedly installed on the lifting structure, and the movable block is driven to rotate by the motion module.

2. The core drilling equipment for road and bridge tunnel construction according to claim 1, characterized in that, The motion module includes: Fixing part; The fourth power unit is fixedly installed on one side of the fixed part; The second slider is slidably engaged with the fixed part and is driven to move linearly by the fourth power device. A limit groove is provided on the side of the second slider. A rotating connecting block, one end of which is rotatably connected to the fixed part, and the other end of which is provided with a pulley near the fixed part, the pulley being embedded in a limiting groove; A rotating block is mounted on the connecting shaft between the rotating connecting block and the fixed part, and is fixedly connected to the movable block.

3. The core drilling equipment for road and bridge tunnel construction according to claim 2, characterized in that, The motion module also includes limiters, and there are two sets of limiters. The two sets of limiters are arranged opposite to each other at both ends of the fixed part, and both sets of limiters are arranged on the motion trajectory of the second slider.

4. The core drilling equipment for road and bridge tunnel construction according to claim 1, characterized in that, The core drilling equipment also includes a pitch structure, on which the aforementioned pitch angle adjustment structure is fixedly installed. The pitch structure includes: Base; A pitch seat, one side of which is pivotally connected to a base; The fifth power unit drives the pitch seat to rotate around its pivot axis with respect to the base.

5. A core drilling device for road and bridge tunnel construction according to claim 4, characterized in that, The pitch structure also includes: The first limiting post is located on the pitch seat away from the side where it is pivotally connected to the base; The second limiting post is fixed on the base, corresponding to the first limiting post; A fastening plate, which is rotatably mounted on the end of the second limiting post; The sixth power device drives the fastening plate to rotate so that the fastening plate is fastened to the end of the first limiting post.

6. The core drilling equipment for road and bridge tunnel construction according to claim 4, characterized in that, The core drilling equipment also includes a movable structure, on which the pitching structure is fixedly installed. The movable structure drives the entire core drilling equipment to move on the ground.

7. A core drilling method for a core drilling device used in road and bridge tunnel construction according to claim 1, characterized in that, The core drilling method includes: S100: The moving structure drives the entire core drilling equipment into the tunnel and moves it to the preset core sampling point; S200: The fifth power unit drives the pitch seat to pivot until the end of the first limit post abuts against the end of the second limit post. Then the sixth power unit drives the fastening plate to rotate so that the fastening plate fastens the end of the first limit post. S300: The fourth power unit drives the second slider to slide, thereby driving the rotating connecting block to rotate around its pivot axis with the fixed part, thereby driving the rotating block to rotate, and then driving the movable block that is fixed to the rotating block to move, adjusting the elevation angle of the drilling core structure; S400: The lifting structure drives the overall linear movement of the core drilling structure to make the core drilling structure abut and fix against the arch. The first power device is started to drive the drill rod to rotate. The cooling water pump is started to pump water into the spray water ring and spray cooling water to the drilling point through the spray. S500: The second power unit starts, driving the drill rod to move linearly. The rotating drill rod feeds towards the core sampling point of the arch. After contacting the arch, the second power unit continues to drive the drill rod to move linearly in that direction. During the feeding process, the drill rod continuously rotates and cuts the arch until it reaches a preset depth. Then the second power unit stops working. After a preset time, the second power unit drives the drill rod to move linearly away from the drilling point until the drill rod completely leaves the drilling point. Then the first power unit stops working. S600: The lifting structure drives the drilling and coring structure to descend to the preset height, and the high-pressure air source is activated. Pressurized air enters the drill rod through the air inlet pipe, air inlet chamber and air inlet in sequence. The pressurized gas acts on the end of the core column and gradually pushes the core column out. The core column that has been pushed out is removed manually to complete the coring work at the current coring point. In step S500, when the drill rod is rotating and cutting the arch, cooling water is sprayed onto the drill rod to cool it down. During this process, the waste liquid generated flows along the return cavity to the bottom of the return cavity under the action of gravity and overflows from the drain port into the annular half-pipe. The slurry pump is started to pump out the waste liquid.

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