Coring bit for collecting rock core with stable shape

Abstract

The utility model provides a coring bit for collecting a rock core in a stable shape. The coring bit comprises a drill rod, an excavation bit and a coring pipe, and a spiral channel is formed in the outer side of the drill rod. The excavating drill bit is arranged on the drill rod, a cutting part is arranged on the side, away from the drill rod, of the excavating drill bit, the spiral channel extends to the excavating drill bit, and the end, located on the excavating drill bit, of the spiral channel is communicated with the outside. And the coring pipe is arranged in the drill rod. According to the coring bit for collecting the rock core in the stable shape, the spiral channel is formed in the outer side of the drill rod, soil blocks in a stratum can be embedded into the spiral channel, the soil blocks can absorb longitudinal vibration for the drill rod, and therefore the stability of the drill rod is improved, and the shape of the collected rock core is more stable.

Description

Technical Field

[0001] The present application relates to a field, and in particular to a coring drill bit for collecting rock cores with stable shapes. Background Art

[0002] Some traditional coring drills have a large up and down vibration when collecting cores. During the contact between the drill bit and the rock, due to the unevenness of the rock or improper design of the drill bit, the friction may act unevenly on different parts of the drill bit, causing vibration, which results in an uneven surface of the collected core or even fractures. These vibrations may be caused by friction between the drill bit and the rock, instability of the drill rod, or uneven drilling, and these factors directly affect the quality and use value of the core.

[0003] Vibration can cause the surface of the core to be uneven, which may distort the geometry of the core sample, thus affecting the accuracy of subsequent core analysis and test results. For example, in the physical property test of the core, the uneven surface of the core may cause deviations in the measured physical property parameters, thus affecting the accurate understanding of the rock properties. If the vibration amplitude is too large, the core may even break during the collection process. In this case, the collected core sample may lose its integrity, making it impossible to conduct a complete core analysis. The appearance of broken core may also require the drilling operation to be stopped or restarted, increasing exploration and development costs and extending the construction period.

[0004] Therefore, it is necessary to design a new type of coring and excavation drill bit that can effectively reduce the vibration amplitude, stabilize the core collection process, and ensure that the surface of the collected core samples is smooth and complete, thereby improving the use value and analysis accuracy of the core, thereby solving the problem of unstable shape of the sample surface collected by some traditional coring and excavation drill bits. Utility Model Content

[0005] In view of this, it is necessary to provide a method to solve the above problems.

[0006] An embodiment of the present application provides a coring drill bit for collecting a rock core of a stable shape, comprising:

[0007] A drill rod, wherein the length direction of the drill rod is recorded as a first direction, and a spiral channel is opened on the outer side of the drill rod, and the spiral channel extends along the first direction;

[0008] an excavation drill bit, arranged on the drill rod, the excavation drill bit having a cutting portion on a side away from the drill rod in the first direction, the spiral channel extending to the excavation drill bit, and the spiral channel being located at one end of the excavation drill bit and communicating with the outside;

[0009] A coring tube is disposed inside the drill pipe, and a length direction of the coring tube is parallel to the first direction.

[0010] In at least one embodiment of the present application, it also includes:

[0011] A vacuum tube, wherein the vacuum tube is arranged at one end of the drill rod away from the excavation drill bit, one end of the vacuum tube is connected to the coring tube, and the other end is connected to the outside, and the length direction of the vacuum tube is parallel to the length direction of the coring tube;

[0012] A gas push rod, the gas push rod is slidably connected to the vacuum tube, the length direction of the gas push rod is parallel to the length direction of the vacuum tube, one end of the gas push rod extends into the core tube, and the other end extends out of the vacuum tube, the gas push rod has a gas push part, the gas push part is in contact with the inner wall of the vacuum tube, and the gas push part pushes the gas to flow in the vacuum tube;

[0013] The air-sealing structure is arranged on a side of the vacuum tube away from the core-taking tube, the air-sealing structure is rotatably connected to the vacuum tube, and the air-sealing structure can be rotated to cover the vacuum tube to cut off the connection between the vacuum tube and the outside world.

[0014] In at least one embodiment of the present application, a first cover plate is provided at one end of the vacuum tube away from the core sampling tube, the air-locking structure is rotatably connected to the first cover plate, a first air vent is provided on the cover plate, the vacuum tube is connected to the outside world through the first air vent, and the air-locking structure is rotated to cover the first air vent to cut off the connection between the core sampling tube and the outside world.

[0015] In at least one embodiment of the present application, a second cover plate is provided on the side of the core sampling tube close to the vacuum tube, the vacuum tube is provided on the second cover plate, a second vent is provided on the second cover plate, and the second vent connects the vacuum tube and the core sampling tube.

[0016] In at least one embodiment of the present application, a rubber head is provided on one end of the air pushing rod located in the core tube.

[0017] In at least one embodiment of the present application, the air-locking structure includes a switch spring, an air-locking block and a clip. The air-locking block is rotatably connected to the first cover plate, one end of the switch spring is arranged on the air-locking block, and the other end is arranged on the first cover plate. The clip is slidably connected to the first cover plate, and the clip can slide to the rotation path of the air-locking block to prevent the air-locking block from rotating.

[0018] In at least one embodiment of the present application, a sliding hole is formed on the first cover plate, the length direction of the sliding hole is parallel to the first direction, and the buckle has a sliding portion, and the sliding portion is slidably connected in the sliding hole.

[0019] In at least one embodiment of the present application, the sliding hole is a square hole.

[0020] In at least one embodiment of the present application, the excavation drill bit is bolted to the drill rod.

[0021] In at least one embodiment of the present application, a connecting shaft and a connecting sleeve are provided on a side of the first cover plate away from the vacuum tube.

[0022] The coring drill bit for collecting stable-shaped cores provided above has a spiral channel opened on the outside of the drill rod, and this design makes the drill rod have better stability and guidance. The setting of the spiral channel helps to reduce the problem of uneven friction when the excavation drill bit contacts the rock, thereby preventing the occurrence of vibration. At the same time, the spiral channel allows soil blocks in the stratum to be embedded in the spiral channel. These soil blocks can absorb longitudinal vibrations for the drill rod, thereby improving the stability of the drill rod and making the shape of the collected core more stable, thereby solving the problem of unstable shape of the sample surface collected by some traditional coring excavation drill bits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural stereogram of a coring drill bit for collecting rock cores of stable shape;

[0024] Figure 2 A structural stereogram of a coring drill bit for collecting rock cores of stable shape;

[0025] Figure 3 A structural stereogram of a coring drill bit for collecting rock cores of stable shape;

[0026] Figure 4 An exploded view of the structure of a coring drill bit for collecting a core of a stable shape;

[0027] Figure 5 is a side view of a coring drill bit for collecting a core of a stable shape;

[0028] Figure 6 for Figure 5 Section AA of

[0029] Figure 7 It is a stereoscopic diagram of the vacuum tube, the first cover plate, the connecting shaft and the connecting sleeve.

[0030] Main component symbols

[0031] 100. A coring drill bit for collecting a core having a stable shape; 1. a drill rod; 11. a spiral channel; 2. an excavation drill bit; 21. a cutting portion; 3. a coring tube; 31. a second cover plate; 311. a second vent; 4. a vacuum tube; 41. a first cover plate; 411. a first vent; 412. a sliding hole; 5. an air-pushing rod; 51. an air-pushing portion; 52. a rubber head; 6. an air-closing structure; 61. a switch spring; 62. an air-closing block; 63. a buckle; 631. a sliding portion; 7. a connecting shaft; 71. a connecting sleeve; a. a first direction; DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0033] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0034] An embodiment of the present application provides a coring drill bit for collecting a rock core of a stable shape, comprising:

[0035] A drill rod, wherein the length direction of the drill rod is recorded as a first direction, and a spiral channel is opened on the outer side of the drill rod, and the spiral channel extends along the first direction;

[0036] an excavation drill bit, arranged on the drill rod, the excavation drill bit having a cutting portion on a side away from the drill rod in the first direction, the spiral channel extending to the excavation drill bit, and the spiral channel being located at one end of the excavation drill bit and communicating with the outside;

[0037] A coring tube, the coring tube is arranged inside the drill rod, and the length direction of the coring tube is parallel to the first direction. The coring drill bit for collecting stable-shaped cores provided above has a spiral channel opened on the outside of the drill rod. This design makes the drill rod have better stability and guidance. The setting of the spiral channel helps to reduce the problem of uneven friction when the excavation drill bit contacts the rock, thereby preventing the occurrence of vibration. At the same time, the spiral channel allows soil blocks in the stratum to be embedded in the spiral channel. These soil blocks can absorb longitudinal vibrations for the drill rod, thereby improving the stability of the drill rod and making the shape of the collected core more stable, thereby solving the problem of unstable shape of the sample surface collected by some traditional coring excavation drill bits.

[0038] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] See also Figure 1-Figure 7 The embodiment of the present application provides a coring drill bit 100 for collecting stable-shaped cores, including a drill rod 1, an excavation drill bit 2, and a coring tube 3. The length direction of the drill rod 1 is recorded as a first direction a. A spiral channel 11 is provided on the outer side of the drill rod 1, and the spiral channel 11 extends along the first direction a. The excavation drill bit 2 is arranged on the drill rod 1, and the excavation drill bit 2 has a cutting portion 21 on the side away from the drill rod 1 in the first direction a. The spiral channel 11 extends to the excavation drill bit 2, and one end of the spiral channel 11 located on the excavation drill bit 2 is connected to the outside. The coring tube 3 is arranged inside the drill rod 1, and the length direction of the coring tube 3 is parallel to the first direction a.

[0040] Specifically, the drill rod 1 is the supporting structure of the entire system, and the spiral channel 11 is responsible for bringing the core from the borehole to the surface. The design of the spiral channel 11 helps to stabilize the transportation of the core in the borehole, reduce the collapse and fragmentation of rock cuttings, and thus ensure the integrity of the core. When the drill bit is drilled into the ground, the spiral channel 11 is responsible for transporting the core from the borehole to the surface while maintaining the complete shape of the core. This design is suitable for rock exploration and sampling scenarios where the integrity of the core needs to be protected, such as geological exploration, mineral exploration, etc. The excavation drill bit 2 is located on the drill rod 1 and is responsible for the actual drilling operation. Its cutting part 21 is designed to enable it to effectively cut the rock during the drilling process so as to further extract the core. When the excavation drill bit 2 rotates, it uses the cutting part 21 to cut the rock to form a core. This design is suitable for scenarios where it is necessary to drill holes in rocks and collect cores, such as geological exploration, foundation drilling in construction, etc. The core tube 3 is a pipe for storing and protecting the core to ensure that the core will not be damaged or contaminated during the collection process. The core tube 3 safely transports the collected core to the surface by cooperating with the inside of the drill pipe 1. This design is suitable for scenarios where it is necessary to collect cores and maintain their integrity, such as geological exploration, rock sample analysis, etc.

[0041] Further, when describing the relationship between the spiral channel 11 and the first direction a, one can imagine how the spiral channel 11 extends along the length direction of the drill rod 1. Suppose you stand at one end of the drill rod 1 and stand it upright. Now, if you look up along the length direction of the drill rod 1, you will see that the spiral channel 11 starts from the bottom of the drill rod 1 (the end closest to the ground) and then spirally extends upward along the axis direction of the drill rod 1. This means that even if you move along the axis direction of the drill rod 1, the spiral channel 11 will always remain on the same side instead of passing through the drill rod 1 to the opposite side. In other words, the spiral shape of the spiral channel 11 extends along the length direction of the drill rod 1 instead of extending laterally or passing through the drill rod 1. The benefit of this design may be to improve the stability of the drill rod 1 during drilling, while also facilitating the entry or discharge of drilled materials from the spiral channel 11. The spiral channel 11, through its special spiral structure, can smoothly transport the core cut by the drill bit during drilling to the surface. This helps to reduce the collapse and fragmentation of rock cuttings and maintain the integrity of the core. The design of the spiral channel 11 can reduce the friction of rock cuttings around the drill rod 1, thereby reducing the resistance of the drill bit when drilling into the rock and improving the drilling efficiency. When the coring drill bit starts drilling underground, the drill bit will drill into the rock in a rotating manner. In this process, the spiral channel 11 also rotates with the drill bit. After the drill bit cuts the core, the core will be brought to the outside of the drill rod 1 along the spiral channel 11. The design of the spiral channel 11 allows the core to be smoothly transported to the surface along the channel.

[0042] Furthermore, the design of the spiral channel 11 is not only for conveying the core, it also has the function of stabilizing the drill rod 1. When the drill bit rotates in the rock, surrounding rock fragments or small stones may be attracted by the structure of the spiral channel 11 and embedded therein. These rock fragments form a support structure, similar to a filler, fixed to the wall of the spiral channel 11. These embedded rock fragments play a buffering and stabilizing role when the drill rod 1 vibrates, absorbing the vibration of the drill rod 1 in the longitudinal direction. Therefore, they have the effect of reducing the vibration of the drill rod 1, making the drill rod 1 more stable during the drilling process. This stability is very important for ensuring the accurate collection of the core and improving the drilling efficiency.

[0043] In a specific example, it also includes:

[0044] A vacuum tube 4, wherein the vacuum tube 4 is arranged at one end of the drill rod 1 away from the excavation drill bit 2, one end of the vacuum tube 4 is connected to the coring tube 3, and the other end is connected to the outside, and the length direction of the vacuum tube 4 is parallel to the length direction of the coring tube 3;

[0045] A gas push rod 5, wherein the gas push rod 5 is slidably connected to the inside of the vacuum tube 4, wherein the length direction of the gas push rod 5 is parallel to the length direction of the vacuum tube 4, wherein one end of the gas push rod 5 extends into the inside of the core tube 3, and the other end extends out of the vacuum tube 4, wherein the gas push rod 5 has a gas push portion 51, wherein the gas push portion 51 is in contact with the inner wall of the vacuum tube 4, and wherein the gas push portion 51 pushes the gas to flow in the vacuum tube 4;

[0046] The air-sealing structure 6 is arranged on a side of the vacuum tube 4 away from the core-taking tube 3. The air-sealing structure 6 is rotatably connected to the vacuum tube 4. The air-sealing structure 6 can be rotated to cover the vacuum tube 4, thereby cutting off the connection between the vacuum tube 4 and the outside.

[0047] Specifically, the role of the vacuum tube 4 is to form a vacuum environment during the core collection process, so that the core can be effectively adsorbed and fixed inside the core tube 3, preventing the core from loosening or falling off during the collection process. One end of the vacuum tube 4 is connected to the core tube 3, and the other end is connected to the outside world. After the core is sampled, the external vacuum pump sucks out the gas in the vacuum tube 4 through the external connection at the other end to form a vacuum environment, ensuring that the core is stably fixed in the core tube 3. The role of the push rod 5 is to adjust the air pressure in the vacuum tube 4 by pushing the gas to flow in the vacuum tube 4, so as to control the collection and fixation of the core. The push rod 5 is connected to the inside of the vacuum tube 4 by sliding, one end extends into the core tube 3, and the other end extends out of the vacuum tube 4. The push part 51 on the push rod 5 fits with the inner wall of the vacuum tube 4. When the gas is pushed by the push part 51, the gas flows in the vacuum tube 4, thereby controlling the air pressure in the vacuum tube 4. The function of the air-tight structure 6 is to cut off the connection between the vacuum tube 4 and the outside world when the core is not needed, so as to prevent the vacuum pump from continuing to run unnecessarily and save energy. The air-tight structure 6 is arranged on the side of the vacuum tube 4 away from the coring tube 3 and is connected to the vacuum tube 4 by rotation. When the core is not needed, the air-tight structure 6 is rotated to cover the vacuum tube 4, cutting off the connection between the vacuum tube 4 and the outside world, so that the vacuum environment in the vacuum tube 4 can be maintained.

[0048] In a specific example, a first cover plate 41 is provided at one end of the vacuum tube 4 away from the core sampling tube 3, and the air-locking structure 6 is rotatably connected to the first cover plate 41. A first air vent 411 is provided on the cover plate, and the vacuum tube 4 is connected to the outside world through the first air vent 411. The air-locking structure 6 rotates to cover the first air vent 411 to cut off the connection between the core sampling tube 3 and the outside world.

[0049] Specifically, a first cover plate 41 is provided at one end of the vacuum tube 4 away from the core tube 3, and its main function is to close the end of the vacuum tube 4 to prevent environmental gas from entering the vacuum tube 4 and interfering with the formation of a vacuum environment. When it is not necessary to collect cores, the first cover plate 41 closes the end of the vacuum tube 4 to ensure that a vacuum environment is formed inside the vacuum tube 4. The air-tight structure 6 is rotatably connected to the first cover plate 41 to control the ventilation and cutoff of the vacuum tube 4 from the outside. The air-tight structure 6 is connected to the first cover plate 41 by rotation. When it is necessary to cut off the ventilation of the vacuum tube 4 from the outside, the air-tight structure 6 is rotated to a position covered on the first cover plate 41. A first vent 411 is provided on the first cover plate 41 for communicating with the outside when necessary to break the vacuum environment. When the air-tight structure 6 is rotated to cover the first vent 411, the vacuum tube 4 communicates with the outside through the first vent 411, breaking the vacuum environment, so that the inside of the core tube 3 is connected to the outside gas. In general, the purpose of these designs is to ensure that a vacuum environment is formed in the core sampling tube 3 to fix the core when core sampling is required, and to break the vacuum environment and cut off the ventilation between the core sampling tube 3 and the outside world through the control of the air-tight structure 6 when core sampling is not required, so as to ensure the normal operation of the system and save energy.

[0050] In a specific example, a second cover plate 31 is provided on the side of the core sampling tube 3 close to the vacuum tube 4, the vacuum tube 4 is arranged on the second cover plate 31, a second vent 311 is opened on the second cover plate 31, and the second vent 311 connects the vacuum tube 4 and the core sampling tube 3.

[0051] Specifically, the second cover plate 31 is located on the side of the core tube 3 close to the vacuum tube 4, and its function is to close one side of the core tube 3, connect to the vacuum tube 4, and provide a vent. The second cover plate 31 is fixed on the core tube 3, and the vacuum tube 4 is closely connected to the core tube 3. In this way, the sealed connection between the vacuum tube 4 and the core tube 3 can be ensured, and the gas exchange can be achieved through the vent on the second cover plate 31. The second vent 311 is an opening located on the vacuum tube 4, corresponding to the vent on the second cover plate 31. Its function is to enable the gas in the vacuum tube 4 to exchange with the gas in the core tube 3 to maintain the air pressure balance inside the system. When the second cover plate 31 is connected to the vacuum tube 4 and is located on the side of the core tube 3 close to the vacuum tube 4, the second vent 311 corresponds to the vent on the second cover plate 31, so that the gas between the vacuum tube 4 and the core tube 3 can be exchanged. In summary, the purpose of these designs is to ensure a good connection between the core sampling tube 3 and the vacuum tube 4, and to achieve gas exchange through the vent on the second cover plate 31 and the second vent 311 on the vacuum tube 4, so as to maintain the air pressure balance inside the system and ensure the smooth progress of the core sampling process.

[0052] In a specific example, a rubber head 52 is provided on one end of the air pushing rod 5 located inside the core tube 3 .

[0053] Specifically, the main function of the rubber head 52 is to provide buffering and sealing when the air push rod 5 contacts the inside of the core sampling tube 3. Since rubber is soft and elastic, it can alleviate the collision between the air push rod 5 and the core sampling tube 3 and reduce the impact force. At the same time, it provides good sealing when pushing gas to prevent gas leakage. The softness of the rubber head 52 can reduce the friction of the air push rod 5 on the core sampling tube 3 when it moves inside the core sampling tube 3, avoiding scratching or damaging the internal surface of the core sampling tube 3. As a part of the air push rod 5, the rubber head 52 can provide a certain buffering effect when the core is pushed into the core sampling tube 3, reduce the extrusion force on the core, and protect the integrity of the core.

[0054] In a specific example, the air-locking structure 6 includes a switch spring 61, an air-locking block 62 and a buckle 63. The air-locking block 62 is rotatably connected to the first cover plate 41. One end of the switch spring 61 is arranged on the air-locking block 62, and the other end is arranged on the first cover plate 41. The buckle 63 is slidably connected to the first cover plate 41, and the buckle 63 can slide to the rotation path of the air-locking block 62 to prevent the air-locking block 62 from rotating.

[0055] Specifically, the switch spring 61 is an important component of the air-tight structure 6, and its function is to provide power for the air-tight block 62 to rotate, and to switch the air-tight block 62 from the open position to the closed position when necessary. One end of the switch spring 61 is connected to the air-tight block 62, and the other end is connected to the first cover plate 41. When the air-tight structure 6 needs to be closed, the switch spring 61 will be compressed or stretched, thereby generating a force to rotate the air-tight block 62 to the closed position. The air-tight block 62 is a key component for controlling the opening and closing of the air-tight structure 6. It is connected to the switch spring 61 and the first cover plate 41 and is responsible for rotating the switch. The air-tight block 62 is connected to the first cover plate 41 by rotation. When the force of the switch spring 61 is applied, the air-tight block 62 will rotate to the open or closed position. The buckle 63 is a component for limiting the rotation of the air-tight block 62 to prevent it from accidentally rotating when not needed. The buckle 63 can slide to the rotation path of the air-tight block 62 by slidingly connecting with the first cover plate 41. When it is necessary to prevent the air-tight block 62 from rotating, the buckle 63 will slide onto the rotation path of the air-tight block 62 to prevent the air-tight block 62 from rotating.

[0056] In a specific example, a sliding hole 412 is formed on the first cover plate 41 , and the length direction of the sliding hole 412 is parallel to the first direction a. The buckle 63 has a sliding portion 631 , and the sliding portion 631 is slidably connected in the sliding hole 412 .

[0057] Specifically, the sliding hole 412 is a hole located on the first cover plate 41, and its function is to provide the sliding portion 631 of the buckle 63 for use, so that the buckle 63 can move freely in the sliding hole 412 to achieve the restriction and control of the air-blocking block 62. When it is necessary to prevent the air-blocking block 62 from rotating, the sliding portion 631 of the buckle 63 will move freely in the sliding hole 412 through the connection with the sliding hole 412, so as to achieve the effect of blocking the rotation of the air-blocking block 62. The sliding portion 631 of the buckle 63 is a component of the buckle 63, and its function is to slide in the sliding hole 412 to achieve the restriction and control of the air-blocking block 62. The connection method of the sliding portion 631 of the buckle 63 and the sliding hole 412 enables it to slide freely in the hole, and adjust the position as needed, so as to achieve the purpose of blocking the rotation of the air-blocking block 62.

[0058] In one specific example, the sliding hole 412 is a square hole.

[0059] Specifically, the square hole is easier to achieve cooperation with the buckle 63 than holes of other shapes, because the boundaries of the square hole are clearer, and it is easier to ensure the stable movement of the sliding portion 631 of the buckle 63 in the hole. The shape of the square hole makes it easier to position and fix it during installation, because the four boundaries of the square hole provide clear position reference points, which helps to ensure the correct position and direction of the sliding hole 412. Compared with holes of other complex shapes, the manufacturing cost of the square hole is lower and the manufacturing process is simpler, so it can reduce manufacturing costs and improve production efficiency. The shape of the square hole makes it easier to clean and maintain the inside, because there are no sharp edges or curved curves at the corners, which reduces the hiding of dust and dirt.

[0060] In a specific example, the excavation drill bit 2 is bolted to the drill rod 1 .

[0061] Specifically, the bolt connection provides a stable connection between the excavation drill bit 2 and the drill rod 1, ensuring that it will not loosen or fall off during the rock drilling process. Through the bolt connection, the excavation drill bit 2 can be easily installed on the drill rod 1, and can also be quickly replaced when necessary, thereby improving the working efficiency. The bolt connection not only provides stability, but also can effectively transmit torque and rotational force, so that the drill rod 1 can smoothly transmit power to the excavation drill bit 2 to complete the rock drilling work. Due to the firmness of the bolt connection, the connection between the excavation drill bit 2 and the drill rod 1 can adapt to different working environments, including various geological conditions and rock types, ensuring the stability and reliability of the drilling work.

[0062] In a specific example, a connecting shaft 7 and a connecting sleeve 71 are provided on a side of the first cover plate 41 away from the vacuum tube 4 .

[0063] Specifically, the connecting shaft 7 is a key component for connecting the airtight structure 6, and it is connected to the airtight structure 6 through the connecting sleeve 71, so that the airtight structure 6 can rotate with the support of the connecting shaft 7. The connecting shaft 7 is fixed on the first cover plate 41 and is connected to the rotation of the airtight structure 6. When it is necessary to control the rotation of the airtight structure 6, the connecting shaft 7 provides an axis of support and rotation to ensure the stable operation of the airtight structure 6. The connecting sleeve 71 is a medium between the connecting shaft 7 and the airtight structure 6. It is located inside the airtight structure 6, and fixes and rotates the airtight structure 6 through the connection with the connecting shaft 7. The connecting sleeve 71 is located inside the airtight structure 6 and is connected to the connecting shaft 7. Through the support and rotation of the connecting shaft 7, the airtight structure 6 can achieve rotational movement with the support of the connecting sleeve 71.

[0064] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A coring drill bit for collecting stable-shaped cores, characterized in that: include: A drill rod, wherein the length direction of the drill rod is recorded as a first direction, and a spiral channel is opened on the outer side of the drill rod, and the spiral channel extends along the first direction; an excavation drill bit, arranged on the drill rod, the excavation drill bit having a cutting portion on a side away from the drill rod in the first direction, the spiral channel extending to the excavation drill bit, and the spiral channel being located at one end of the excavation drill bit and communicating with the outside; A coring tube is disposed inside the drill pipe, and a length direction of the coring tube is parallel to the first direction.

2. The coring drill bit for collecting stable-shaped cores according to claim 1, characterized in that: Also includes: A vacuum tube, wherein the vacuum tube is arranged at one end of the drill rod away from the excavation drill bit, one end of the vacuum tube is connected to the coring tube, and the other end is connected to the outside, and the length direction of the vacuum tube is parallel to the length direction of the coring tube; A gas push rod, the gas push rod is slidably connected to the vacuum tube, the length direction of the gas push rod is parallel to the length direction of the vacuum tube, one end of the gas push rod extends into the core tube, and the other end extends out of the vacuum tube, the gas push rod has a gas push part, the gas push part is in contact with the inner wall of the vacuum tube, and the gas push part pushes the gas to flow in the vacuum tube; The air-sealing structure is arranged on a side of the vacuum tube away from the core-taking tube, the air-sealing structure is rotatably connected to the vacuum tube, and the air-sealing structure can be rotated to cover the vacuum tube to cut off the connection between the vacuum tube and the outside world.

3. The coring drill bit for collecting stable-shaped cores according to claim 2, characterized in that: A first cover plate is provided at one end of the vacuum tube away from the core sampling tube, and the air-sealing structure is rotatably connected to the first cover plate. A first air vent is provided on the cover plate, and the vacuum tube is connected to the outside world through the first air vent. The air-sealing structure rotates until it covers the first air vent to cut off the connection between the core sampling tube and the outside world.

4. The coring drill bit for collecting stable-shaped cores according to claim 2, characterized in that: A second cover plate is provided on one side of the core taking tube close to the vacuum tube, the vacuum tube is arranged on the second cover plate, a second vent is provided on the second cover plate, and the second vent connects the vacuum tube and the core taking tube.

5. The coring drill bit for collecting stable-shaped cores according to claim 2, characterized in that: A rubber head is arranged on one end of the air pushing rod located in the core taking tube.

6. The coring drill bit for collecting stable-shaped cores according to claim 3, characterized in that: The air-locking structure includes a switch spring, an air-locking block and a buckle. The air-locking block is rotatably connected to the first cover plate. One end of the switch spring is arranged on the air-locking block, and the other end is arranged on the first cover plate. The buckle is slidably connected to the first cover plate, and the buckle can slide to the rotation path of the air-locking block to prevent the air-locking block from rotating.

7. The coring drill bit for collecting stable-shaped cores according to claim 6, characterized in that: A sliding hole is formed on the first cover plate, the length direction of the sliding hole is parallel to the first direction, and the buckle has a sliding portion, and the sliding portion is slidably connected in the sliding hole.

8. The coring drill bit for collecting stable-shaped cores according to claim 7, characterized in that: The sliding hole is a square hole.

9. The coring drill bit for collecting stable-shaped cores according to claim 1, characterized in that: The excavation drill bit is bolted to the drill rod.

10. The coring drill bit for collecting stable-shaped cores according to claim 3, characterized in that: A connecting shaft and a connecting sleeve are provided on a side of the first cover plate away from the vacuum tube.

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