Drilling rig and sealing device therefor

Abstract

The application discloses a sealing device. The sealing device comprises a sealing cover, a first limiting piece and a second limiting piece. The sealing cover and the drill rod hole form a seal. The first limiting piece is fixedly connected to the tower. The second limiting piece is fixedly connected to the sealing cover. The first limiting piece has a first rotation track rotating around a first axis and a second rotation track rotating around a second axis. The second limiting piece at least partially overlaps with the space passed by the first rotation track to form a limit between the first limiting piece and the second limiting piece when the first limiting piece rotates around the first axis. The second limiting piece is located outside the space passed by the second rotation track to enable independent movement between the first limiting piece and the second limiting piece when the first limiting piece rotates around the second axis. The application has the beneficial effect of providing a drilling rig and its sealing device, which can be detachably connected between the tower and the sealing cover and automatically realize the connection or separation between the tower and the sealing cover when the first limiting piece rotates around different axes.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery, and specifically relates to a drilling rig and its sealing device. Background Technology

[0002] Blasting hole drilling rigs generate a large amount of dust during drilling operations, easily causing sandstorms and environmental pollution. The dust in the air also negatively impacts the health of operators. With the increasing national requirements for green mining and environmental protection, we urgently need new designs to prevent dust leakage, ensuring that all dust is concentrated inside the drilling rig's dust cover, filtered by a dust collector, and then released into the atmosphere, thus guaranteeing clean air quality.

[0003] In related technologies, Chinese patent document CN102747969A provides a sliding dust removal device. It includes a sliding horizontal worktable and a drill rod sealing cover that contacts the horizontal worktable and surrounds the drill rod. The horizontal worktable and the drill rod sealing cover effectively surround the dust generated during drilling below the horizontal worktable. The horizontal worktable includes a sliding plate and a fixed plate. The fixed plate has a rectangular opening, and guide rails are provided on both sides of the rectangular opening. The sliding plate slides within the guide rails. The sliding plate has an opening for the drill rod sealing cover for placing the sealing cover. In this solution, because dust can easily enter the guide rails, the sliding plate is prone to jamming when sliding within the guide rails, causing deformation of the guide rails and the sliding plate, ultimately affecting the dust sealing effect. Moreover, jamming can easily cause violent shaking of the tower, potentially posing additional safety risks. Related technologies do not provide any technical solutions to the aforementioned problems. Summary of the Invention

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background art, as a first aspect of this application, some embodiments of this application provide a sealing device for sealing a drill pipe hole of a drilling rig. The drilling rig includes a tower. The sealing device includes a sealing cover, a first limiting member, and a second limiting member. A seal is formed between the sealing cover and the drill pipe hole. The first limiting member is fixedly connected to the tower. The second limiting member is fixedly connected to the sealing cover. The first limiting member has a first rotational trajectory about a first axis and a second rotational trajectory about a second axis. The second limiting member at least partially overlaps with the space traversed by the first rotational trajectory so that a limit is formed between the first limiting member and the second limiting member when rotating about the first axis. The second limiting member is located outside the space traversed by the second rotational trajectory so that the first limiting member moves independently of the second limiting member when rotating about the second axis.

[0006] Furthermore, the side of the first limiting member closest to the second limiting member is at least partially constructed as a curved surface, and the protrusion direction faces the second limiting member or / and

[0007] The side of the second limiting member closest to the first limiting member is at least partially constructed as a curved surface, and the groove opening faces the first limiting member.

[0008] Furthermore, when the first limiting member is located at the overlap of the first rotation trajectory and the second rotation trajectory, there is a gap between the first limiting member and the second limiting member.

[0009] Furthermore, the sealing cover includes a top plate and a side plate. The top plate is located above the drill pipe hole. The side plate is located below the top plate. The side plate is fixedly connected to the top plate. The side plate at least partially penetrates the drill pipe hole and forms a seal against it. A second limiting member is fixedly connected to the top plate.

[0010] Furthermore, the sealing device also includes a first pressure plate and a first sealing gasket. The first pressure plate is located below the top plate. The first sealing gasket is located between the first pressure plate and the vehicle frame. The first pressure plate and the first sealing gasket are bolted to the vehicle frame; the first pressure plate and the first sealing gasket are arranged around the side plate and in close contact with it; the length of the first pressure plate is greater than the length or width of the side plate it contacts.

[0011] Furthermore, the outline of the side plate projected onto a projection plane perpendicular to the first axis is part of a circular ring. The axis of rotation of the circular ring is the first axis.

[0012] Furthermore, the top plate has an opening. The sealing device also includes a protective plate. The protective plate is located above the top plate. One end of the protective plate is rotatably connected to the top plate to cover or open the opening.

[0013] As a second aspect of this application, some embodiments of this application claim protection for a drilling rig. The drilling rig includes a frame, a tower, a support device, and the aforementioned sealing device. The frame is located below a top plate and has drill rod holes. The tower has a first connecting portion and a second connecting portion. The support device includes a telescopic frame and a fixed frame. The telescopic frame is rotatably connected to the frame. The fixed frame is rotatably connected to the frame. The first connecting portion is rotatably connected to one end of the fixed frame and rotates about a second axis. The second connecting portion is detachably connected to the other end of the fixed frame.

[0014] Furthermore, the mounting bracket is rotatably connected to the frame and rotates about the first axis.

[0015] Furthermore, the top plate is rotatably connected to the fixed frame and rotates about the first axis.

[0016] The beneficial effects of this application are as follows:

[0017] A solution is provided for a detachable connection between a tower and a sealing cover, which can automatically achieve the connection or separation between the tower and the sealing cover when the first limiting member rotates around different axes.

[0018] More specifically, some embodiments of this application may produce the following specific beneficial effects:

[0019] In this application, when the first limiting member is located at the overlap of the first rotation trajectory and the second rotation trajectory, there is a gap between the first limiting member and the second limiting member, and the size of the gap is limited to a reasonable range, so that when the first limiting member rotates along the second rotation trajectory, it can not only move smoothly, but also prevent the sealing cover from suddenly falling and colliding with the frame.

[0020] In this application, the outline of the side plate projected onto the projection plane perpendicular to the first axis is part of a ring and the central axis of the ring is the first axis. This ensures that the side plate always maintains tight contact with the drill pipe hole, regardless of whether the sealing cover rotates clockwise or counterclockwise, and regardless of the angle. This ensures the sealing performance of the sealing cover. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0022] Throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0023] In the attached diagram:

[0024] Figure 1 This is an overall schematic diagram of a drilling rig according to one embodiment of this application;

[0025] Figure 2 for Figure 1 A partial schematic diagram of the drilling rig in the illustrated embodiment mainly shows structures such as sealing devices;

[0026] Figure 3 for Figure 2 The enlarged schematic diagram at point A mainly shows the structure such as the first limiting member;

[0027] Figure 4 for Figure 2 The enlarged schematic diagram at point B mainly shows the structure such as the first sealing gasket;

[0028] Figure 5 for Figure 1 A partial schematic diagram of the drilling rig in the illustrated embodiment from another perspective, mainly showing the first axis, etc.;

[0029] Figure 6 for Figure 1 The rotation trajectory of the first limiting member about the first axis in the illustrated embodiment;

[0030] Figure 7 for Figure 6 The enlarged schematic diagram at point C mainly shows the spatial relationship between the second limiting member and the first rotation trajectory;

[0031] Figure 8 for Figure 1 The rotation trajectory of the first limiting member about the second axis in the illustrated embodiment;

[0032] Figure 9 for Figure 8 The enlarged schematic diagram at point D mainly shows the spatial relationship between the second limiting member and the second rotation trajectory;

[0033] Figure 10 for Figure 1 The spatial relationship between the rotation trajectory of the first limiting member about the second axis and the rotation trajectory about the second axis in the embodiment shown;

[0034] Figure 11 for Figure 10 The enlarged schematic diagram at point E in the middle mainly shows the spatial relationship between the first rotation trajectory and the second rotation trajectory;

[0035] Figure 12 for Figure 1 The schematic diagram of the sealing device in the illustrated embodiment mainly shows the structure such as the top plate;

[0036] Figure 13 The projection of the side plate onto the projection plane S perpendicular to the first axis.

[0037] Meaning of the reference numerals in the attached figures:

[0038] 100. Drilling rig;

[0039] 200. Chassis;

[0040] 300. Tower; 310. First connecting part; 320. Second connecting part;

[0041] 400. Support device; 410. Telescopic frame; 411. First sliding member; 412. Second sliding member; 413. Locking hole; 420. Fixing frame; 421. Positioning hole; 430. Second locking cylinder; 431. Piston;

[0042] 500, Sealing device; 510, Sealing cover; 511, Top plate; 511a, Opening; 512, Side plate; 513, Protective plate; 513a, Hole; 513b, Groove; 520, First limiting member; 530, Second limiting member; 540, First pressure plate; 550, First sealing gasket; 560, Second pressure plate; 570, Second sealing gasket;

[0043] 600. Lifting cylinder;

[0044] A1, First axis; A2, Second axis; L1, First rotation trajectory; L2, Second rotation trajectory; I, Gap; S, Projection plane. Detailed Implementation

[0045] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0046] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Features in the embodiments of this disclosure can be combined with each other unless otherwise specified.

[0047] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0048] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0049] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Reference Figures 1 to 13 As shown, this embodiment provides a drilling rig 100. The drilling rig 100 includes a frame 200, a tower 300, a support device 400, a sealing device 500, and a lifting cylinder 600. The frame 200 is located below a top plate 511 and has drill rod holes. The tower 300 has a first connecting portion 310 and a second connecting portion 320. The support device 400 includes a telescopic frame 410 and a fixed frame 420. The telescopic frame 410 is rotatably connected to the frame 200. The fixed frame 420 is rotatably connected to the frame 200. The first connecting portion 310 is rotatably connected to one end of the fixed frame 420 and rotates about a second axis A2. The second connecting portion 320 is detachably connected to the other end of the fixed frame 420.

[0051] Specifically, refer to Figures 2 to 11 As shown, the sealing device 500 includes a sealing cover 510, a first limiting member 520, and a second limiting member 530. The frame 200 has a drill rod hole for the drill rod to pass through. A seal is formed between the sealing cover 510 and the drill rod hole. The first limiting member 520 is fixedly connected to the tower 300. The second limiting member 530 is fixedly connected to the sealing cover 510. The first limiting member 520 has a first rotational trajectory L1 about a first axis A1 and a second rotational trajectory L2 about a second axis A2. The second limiting member 530 at least partially overlaps with the space traversed by the first rotational trajectory L1, thereby creating a limit between the first limiting member 520 and the second limiting member 530 when rotating about the first axis A1. The second limiting member 530 is located outside the space traversed by the second rotational trajectory L2, allowing the first limiting member 520 to move independently of the second limiting member 530 when rotating about the second axis A2. The specific connection relationships between the various parts of the drilling rig 100 will be explained in detail later.

[0052] Using the above technical solution, since the first limiting member 520 is fixedly connected to the tower 300, when the drilling rig 100 is in the drilling state, the first limiting member 520 rotates around the first axis A1, and its movement trajectory is the first rotation trajectory L1. In this state, a limiting relationship is formed between the first limiting member 520 and the second limiting member 530, and the first limiting member 520 will drive the second limiting member 530 to rotate together. In this way, it can be ensured that the sealing cover 510 and the drill rod rotate at the same angular velocity, ensuring that the opening 511a of the sealing cover 510 always forms a seal with the drill rod, effectively preventing dust or gravel and other impurities generated by the drill rod during the drilling process from entering the upper part of the sealing cover 510.

[0053] When the drilling rig 100 needs to switch between drilling and retraction states, the first limiting member 520 rotates around the second axis A2, and its movement trajectory is the second rotation trajectory L2. In this state, since the second limiting member 530 is located outside the space traversed by the second rotation trajectory L2, the first limiting member 520 and the second limiting member 530 move independently when rotating around the second axis A2. Independent movement means that the first limiting member 520 and the second limiting member 530 do not interfere with each other when moving within their respective degrees of freedom. The rotation of the tower 300 drives the first limiting member 520 to rotate, but the sealing cover 510 remains stationary. The tower 300 can be smoothly retracted above the frame 200 until the lifting cylinder 600 is fully retracted, so that the tower 300 is in a horizontal state.

[0054] This avoids the problem in existing technologies where the sealing cover 510 includes a guide rail. When the sliding plate slides within the guide rail, dust can easily enter and cause jamming, further deforming the guide rail and sliding plate, ultimately affecting the dust sealing effect. Furthermore, jamming of the sliding plate can easily cause severe shaking of the tower 300, potentially posing additional safety risks.

[0055] More specifically, the side of the first limiting member 520 near the second limiting member 530 is at least partially constructed as a curved surface, and the protrusion direction is toward the second limiting member 530 or / the side of the second limiting member 530 near the first limiting member 520 is at least partially constructed as a curved surface, and the opening 511a of the groove 513b faces the first limiting member 520.

[0056] Reference Figure 3 As shown, in this embodiment, the side of the first limiting member 520 near the second limiting member 530 is constructed as a curved surface, and the protrusion direction is towards the second limiting member 530. The side of the second limiting member 530 near the first limiting member 520 is also constructed as a curved surface.

[0057] By adopting the above technical solution, the contact area between the first limiting member 520 and the second limiting member 530 is large when limiting, making it difficult for them to slip off. The sealing cover 510 is stably connected to the tower 300, which further improves safety.

[0058] More specifically, refer to Figure 7 As shown, when the first limiting member 520 is located at the overlap of the first rotation trajectory L1 and the second rotation trajectory L2, there is a gap I between the first limiting member 520 and the second limiting member 530.

[0059] The minimum spacing dimension of gap I is 1 cm to 10 cm, and can be 0 cm to 2 cm, 2 cm to 4 cm, 4 cm to 6 cm, 6 cm to 8 cm, or 8 cm to 10 cm. For example, in this embodiment, the minimum spacing dimension of gap I is 2 cm.

[0060] By adopting the above technical solution, it can be ensured that when the first limiting member 520 rotates along the second rotation trajectory L2, the first limiting member 520 can smoothly avoid the second limiting member 530. This is because when the first limiting member 520 is located at the overlap of the first rotation trajectory L1 and the second rotation trajectory L2, if there is no gap I between the first limiting member 520 and the second limiting member 530, when the tower 300 changes from a horizontal state to a vertical state, the first limiting member 520 will collide with the second limiting member 530. The weight and inertial force of the tower 300 itself will be applied to the second limiting member 530 through the first limiting member 520, which may easily cause damage to the second limiting member 530.

[0061] In addition, if the gap I is too large, a large number of foreign objects will enter the gap I, damaging the first limiting member 520 and the second limiting member 530. Therefore, the minimum spacing of the gap I needs to be controlled within a certain size range.

[0062] More specifically, refer to Figure 12 As shown, the sealing cover 510 includes a top plate 511 and a side plate 512. The top plate 511 is located above the drill pipe hole. The side plate 512 is located below the top plate 511. The side plate 512 is fixedly connected to the top plate 511. The side plate 512 at least partially penetrates the drill pipe hole and forms a seal on the drill pipe hole. A second limiting member 530 is fixedly connected to the top plate 511.

[0063] Compared with the prior art, the sealing cover 510 of this application has a simple mechanical structure, no guide rails or other components, is easy to install and maintain, is not easily deformed or damaged, and the sealing effect can be guaranteed.

[0064] More specifically, refer to Figure 4As shown, the sealing device 500 also includes a first pressure plate 540 and a first sealing gasket 550. The first pressure plate 540 is located below the top plate 511. The first sealing gasket 550 is located between the first pressure plate 540 and the frame 200. The first pressure plate 540 and the first sealing gasket 550 are fixedly connected to the frame 200 by bolts; the first pressure plate 540 and the first sealing gasket 550 are arranged around the side plate 512 and in close contact with the side plate 512; the length of the first pressure plate 540 is greater than the length or width of the side plate 512 it contacts.

[0065] Using the above technical solution, when the tower 300 of this application is vertically drilled in a position perpendicular to the frame 200, the first limiting member 520 and the second limiting member 530 maintain a reasonable distance and do not come into contact. At this time, under the action of gravity, the sealing cover 510 will rotate slightly around the first axis A1 to the side away from the tower 300, which allows the sealing cover 510 to return to the initial horizontal position, avoiding large impacts and noise. Since the length of the first pressure plate 540 is greater than the length or width of the side plate 512 it contacts, support will be generated between the surface of the frame 200 and the first pressure plate 540, preventing the tower 300 from moving further. Due to the presence of the first sealing gasket 550 between the frame 200 and the first pressure plate 540, the impact of the sealing cover 510 on the frame 200 when it falls back to its original position can also be reduced. At the same time, due to the presence of the surrounding first sealing gasket 550, a seal will be formed with the side plate 512 of the sealing cover 510 to prevent dust from overflowing and effectively improve the dustproof effect.

[0066] Meanwhile, the presence of the first sealing gasket 550 indirectly indicates that the width of gap I should not be too large. This is because if gap I is too large, when the first limiting member 520 moves along the first rotation trajectory L1, it will cause the first limiting member 520 to be limited by the second limiting member 530 after rotating a certain distance, thus causing the sealing device 500 to rotate together. During the process of the first limiting member 520 rotating back, that is, during the process of the tower 300 rotating from a position inclined to the upper surface of the frame 200 to a position perpendicular to the upper surface of the frame 200, Before reaching the vertical position, the first limiting member 520 has already separated from the second limiting member 530 and lost its limiting relationship. At this time, the first limiting member 520 continues to rotate, and the sealing cover 510, having lost the limiting effect of the first limiting member 520, will accelerate its descent until the bottom surface of the top plate 511 of the sealing cover 510 collides with the first pressure plate 540 fixed to the frame 200, causing an impact on the frame 200. This will generate noise and deform the surrounding structure of the frame 200. Due to the rapid descent of the sealing cover 510, the first sealing gasket 550 will also experience rapid wear or even damage. This will further allow dust to escape from the damaged first sealing gasket 550, causing environmental pollution.

[0067] More specifically, refer to Figure 13 As shown, the outline of the side plate 512 projected onto the projection plane S perpendicular to the first axis A1 is part of a circular ring. The axis of rotation of the circular ring is the first axis A1.

[0068] By adopting the above technical solution, since the outline of the side plate 512 projected on the projection plane S perpendicular to the first axis A1 is part of a ring and the central axis of the ring is the first axis A1, this ensures that the side plate 512 can always pass through the drill hole and maintain close contact with the frame 200, regardless of whether the sealing cover 510 rotates clockwise or counterclockwise and the angle is any, thereby ensuring the sealing performance of the sealing cover 510.

[0069] More specifically, refer to Figure 12 As shown, the top plate 511 has an opening 511a. The sealing device 500 also includes a protective plate 513. The protective plate 513 is located above the top plate 511. One end of the protective plate 513 is rotatably connected to the top plate 511 to cover or open the opening 511a.

[0070] Using the above technical solution, due to construction or maintenance needs, users may appear around the sealing cover 510. The opening 511a of the top plate 511 has a diameter of approximately 20 centimeters. If the opening 511a of the top plate 511 remains open, when a user approaches the opening 511a, they may accidentally step into it, causing abrasions or other personal dangers. However, due to the presence of the protective plate 513, when a user appears around the sealing cover 510 and no drill rod passes through the opening 511a, the user can rotate the protective plate 513 to cover the opening 511a, ensuring the user's safe movement around the sealing cover 510 and improving the safety of the device.

[0071] More specifically, refer to Figure 12 As shown, the sealing device 500 further includes a second pressure plate 560 and a second sealing gasket 570. The second pressure plate 560 is located above the opening 511a. The second sealing gasket 570 is located between the second pressure plate 560 and the top plate 511. The second pressure plate 560 and the second sealing gasket 570 are fixedly connected to the top plate 511.

[0072] Using the above technical solution, the power head of the drilling rig 100 slides down the tower 300 with the drill rod. After the drill rod passes through the round hole at the bottom of the tower 300, it passes through the opening 511a on the top plate 511 and comes into contact with the second sealing gasket 570. In this way, the second sealing gasket 570 will form a seal on the surface of the drill rod, further preventing gaps from forming between the drill rod and the top plate 511, which would cause dust to leak from the gaps to the top of the sealing cover 510.

[0073] More specifically, refer to Figure 12As shown, the protective plate 513 has holes 513a and grooves 513b.

[0074] Using the above technical solution, the holes 513a and grooves 513b are ergonomic, making it convenient for users to grip the protective plate 513.

[0075] More specifically, refer to Figure 2 As shown, the support device 400 further includes a first locking cylinder and a second locking cylinder 430. The telescopic frame 410 includes a first sliding member 411 and a second sliding member 412. The first sliding member 411 and the second sliding member 412 form a sliding connection. The first sliding member 411 and the second sliding member 412 are provided with locking holes 413 and are locked or unlocked by the extension or retraction of the piston of the first locking cylinder. The other end of the fixed frame 420 and the second connecting part 320 are provided with mutually cooperating positioning holes 421 and are locked or unlocked by the extension or retraction of the piston 431 of the second locking cylinder 430.

[0076] Using the above technical solution, when the tower 300 needs to switch from the stored state to the vertical drilling state, the following steps are performed: First, ensure that the locking hole 413 between the first sliding member 411 and the second sliding member 412 is locked, and the fixing bracket 420 is in a position perpendicular to the vehicle frame 200. Push the lifting cylinder 600 to make the tower 300 rotate around the second axis A2 until the tower 300 is perpendicular to the vehicle frame 200. Then, extend the piston 431 of the second locking cylinder 430 to achieve locking between the positioning holes 421. The second connecting part 320 of the tower 300 and the other end of the fixing bracket 420 are connected, and vertical drilling can be performed. At this time, the first pressure plate 540 and the first sealing gasket 550 of the sealing cover 510 contact the surface of the vehicle frame 200 and form a support, forming a seal between the vehicle frame 200 and the sealing cover 510, preventing dust from entering the upper part of the vehicle frame 200 from the slot of the vehicle frame 200.

[0077] When the drill rod needs to be drilled at an inclined angle, firstly, ensure that the piston 431 of the second locking cylinder 430 is locked. Then, retract the piston of the first locking cylinder to unlock the locking hole 413 between the first sliding member 411 and the second sliding member 412. Next, the lifting cylinder 600 raises or lowers the tower 300, allowing the tower 300 to rotate around the first axis A1 to adjust the angle. After the angle is adjusted, extend the piston of the first locking cylinder to lock the locking hole 413, ensuring that the first sliding member 411 and the second sliding member 412 no longer slide against each other, allowing for inclined angle drilling. During this process, due to the limiting effect between the first limiting member 520 and the second limiting member 530, when the tower 300 rotates, it can drive the sealing cover 510 to rotate together, ensuring the continuous sealing effect of the sealing cover 510. In this embodiment, the angle adjustment range of the tower 300 is 0 to 30°.

[0078] After the drilling operation is completed, the following steps can be taken to store the tower 300. First, retract the piston of the first locking cylinder to unlock the locking hole 413 between the first sliding member 411 and the second sliding member 412. Then, lift the tower 300 with the lifting cylinder 600 so that the tower 300 rotates around the first axis A1 until it is perpendicular to the frame 200. At this time, the original gap I between the first limiting member 520 and the second limiting member 530 is restored.

[0079] Next, the piston of the first locking cylinder is extended to lock the locking hole 413 between the first sliding member 411 and the second sliding member 412. Then, the piston 431 of the second locking cylinder 430 is retracted to unlock the positioning hole 421. The second connecting part 320 of the tower 300 and the other end of the fixed frame 420 are separated. The tower 300 can rotate around the second axis A2 under the action of the lifting cylinder 600 until it is in the storage state. During this process, there is no need to manually perform special operations to separate the first limiting member 520 and the second limiting member 530.

[0080] In other words, when the tower 300 rotates around the first axis A1 to the inclined drilling state, a fixed connection is automatically formed between the tower 300 and the sealing cover 510; when the drilling is completed and the tower 300 needs to be laid flat, or when it needs to be switched from the flat state to the drilling state, the tower 300 rotates around the first axis A1, and the tower 300 and the sealing cover 510 move independently and separate automatically. The whole process does not require any additional operation to lock or disassemble the first limiting member 520 and the second limiting member 530 to change the connection relationship between the tower 300 and the limiting member.

[0081] More specifically, refer to Figure 2 and Figure 5 As shown, the mounting bracket 420 is rotatably connected to the frame 200 and rotates about the first axis A1.

[0082] By adopting the above technical solution, since the second connecting part 320 of the tower 300 is fixedly connected to the other end of the fixed frame 420, and the fixed frame 420 rotates about the first axis A1, it can ensure that the tower 300 rotates about the first axis A1, thereby ensuring that the first limiting member 520 fixedly connected to the tower 300 rotates along the first axis A1.

[0083] More specifically, refer to Figure 5 As shown, the top plate 511 is rotatably connected to the fixed frame 420 and rotates about the first axis A1.

[0084] By adopting the above technical solution, since the top plate 511 is rotatably connected to the fixed frame 420, it can be ensured that the side plate 512 can also rotate around the first axis A1 along with the top plate 511. Since the outline of the projection of the side plate 512 on the projection plane S perpendicular to the first axis A1 is part of a ring, if the side plate 512 rotates around the first axis A1, it can be ensured that the side plate 512 can always maintain close contact with the drill pipe hole, whether it rotates clockwise or counterclockwise or at any rotation angle.

[0085] It should be noted that the drill pipe hole is sealed by the sealing cover 510 in the figure, making it difficult to mark, therefore it is not marked in the figure. The first locking cylinder and its piston are not shown in the figure; for details, please refer to the description in patent document CN112681986A.

[0086] This application has been described in detail above with reference to specific exemplary embodiments. However, it should be understood that various modifications and variations can be made without departing from the scope of this application as defined by the appended claims. The detailed description and drawings should be considered illustrative only and not restrictive, and any such modifications and variations shall fall within the scope of this application described herein. Furthermore, the background art is intended to illustrate the current state of research and development and significance of the technology, and is not intended to limit this application or its application field.

[0087] More specifically, although exemplary embodiments of this application have been described herein, this application is not limited to these embodiments, but includes any and all embodiments modified, omitted, such as combinations between various embodiments, adaptive changes, and / or substitutions, as would be apparent to those skilled in the art from the foregoing detailed description. The limitations in the claims are to be interpreted broadly as used in the language of the claims and are not limited to the examples described in the foregoing detailed description or during the implementation of this application, which should be considered non-exclusive. Any step enumerated in any method or process claim may be performed in any order and is not limited to the order presented in the claims. Therefore, the scope of this application should be determined solely by the appended claims and their legal equivalents, and not by the description and examples given above.

Claims

1. A sealing device for sealing a drill rod hole of a drilling rig, wherein, The drilling rig includes a tower; The sealing device includes: A sealing cover forms a seal with the drill pipe hole; Its features are: The sealing device further includes: The first limiting component is fixedly connected to the tower. The second limiting member is fixedly connected to the sealing cover; The first limiting member has a first rotation trajectory about a first axis and a second rotation trajectory about a second axis. The second limiting member at least partially overlaps with the space traversed by the first rotation trajectory so that a limit is formed between the first limiting member and the second limiting member when the first limiting member rotates about the first axis; the second limiting member is located outside the space traversed by the second rotation trajectory so that the first limiting member moves independently of the second limiting member when the first limiting member rotates about the second axis. When the first limiting member is located at the overlap of the first rotation trajectory and the second rotation trajectory, there is a gap between the first limiting member and the second limiting member, and the minimum distance of the gap is 1 cm to 10 cm. When the first limiting member moves along the second axis in a second rotational trajectory, it does not come into contact with the second limiting member at all, so as to achieve automatic separation without interference.

2. The sealing device according to claim 1, characterized in that: The side of the first limiting member closest to the second limiting member is at least partially constructed as a curved surface, and the protrusion direction is toward the second limiting member or / and The side of the second limiting member closest to the first limiting member is at least partially constructed as a curved surface, and the groove opening faces the first limiting member.

3. The sealing device according to any one of claims 1 to 2, characterized in that: The sealing cover includes: Top plate, located above the drill pipe hole; Side panels, located below the top panel; The side plate is fixedly connected to the top plate; the side plate at least partially penetrates the drill rod hole and forms a seal on the drill rod hole; the second limiting member is fixedly connected to the top plate.

4. The sealing device according to claim 3, characterized in that: The sealing device further includes: The first pressure plate is located below the top plate; The first sealing gasket is located between the first pressure plate and the vehicle frame; The first pressure plate and the first sealing gasket are fixedly connected to the vehicle frame by bolts; the first pressure plate and the first sealing gasket are arranged around the side plate and in close contact with the side plate; the length of the first pressure plate is greater than the length or width of the side plate it contacts.

5. The sealing device according to claim 4, characterized in that: The outline of the side plate projected onto a projection plane perpendicular to the first axis is part of a circular ring; the axis of rotation of the circular ring is the first axis.

6. The sealing device according to claim 5, characterized in that: The top plate has an opening; The sealing device further includes: A protective plate is located above the top plate; One end of the protective plate is rotatably connected to the top plate to cover or open the opening.

7. A drilling rig, comprising: The frame is located below the top plate and has drill holes; The tower has a first connecting part and a second connecting part; Support device, comprising: The telescopic frame is rotatably connected to the vehicle frame; A fixed frame is rotatably connected to the vehicle frame; The telescopic frame is rotatably connected to the fixed frame; the first connecting part is rotatably connected to one end of the fixed frame and rotates about the second axis; the second connecting part is detachably connected to the other end of the fixed frame. The drilling rig is characterized by further comprising the sealing device as described in any one of claims 1 to 6.

8. The drilling rig according to claim 7, characterized in that: The mounting bracket is rotatably connected to the vehicle frame and rotates about the first axis.

9. The drilling rig according to claim 8, characterized in that: The top plate is rotatably connected to the fixed frame and rotates about the first axis.

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