Drill rod assembly for rotary drilling rig

Abstract

The present invention discloses a drill rod assembly for a rotary drilling rig, which belongs to the technical field of drilling equipment, and includes a drill rod and a drill bit. A connector is arranged between the drill rod and the drill bit, and the connector includes a plug-in column and a connecting seat. The plug-in column is in the shape of a truncated cone with a large upper portion and a small lower portion. The connecting seat is provided with a plug-in slot adapted to the plug-in column. The plug-in column is provided with a first transverse hole, and the first transverse hole is arranged perpendicular to the center line of the drill rod. The side wall of the connecting seat is provided with a second transverse hole. The present invention ensures coaxiality and improves the linear accuracy and overall quality of the drilling operation by adopting a close fit between the truncated cone-shaped plug-in column and the adapting plug-in slot. At the same time, the first and second transverse holes and the transverse plug rod locking mechanism introduced achieve the dual advantages of quick locking and convenient disassembly. In the locked state, the transverse plug rod ensures a stable connection and meets the requirements of high-intensity operations. During disassembly, the problems of jamming or excessive friction that may be encountered in traditional disassembly methods are avoided.

Description

Technical Field

[0001] The invention relates to a rotary drilling machine drill rod assembly and belongs to the technical field of drilling equipment. Background Art

[0002] In the traditional rotary drilling rig drill rod assembly, the end of the drill rod is usually designed with a square block, which is precisely processed to ensure the consistency of its size and shape. Correspondingly, a square groove that is fully compatible with the square block is opened at the upper end of the drill bit to receive and accommodate the square block. This design realizes the connection between the drill rod and the drill bit to a certain extent, but it exposes many shortcomings in actual application.

[0003] First, although the square block and the square slot are simple to match, it is difficult to ensure high-precision coaxiality, which leads to deviations during the drilling process, affecting the linear accuracy and overall quality of the drilling. Secondly, during the disassembly process, the traditional connection method often has a large disassembly resistance. The square block may be stuck in the square slot and cannot be disassembled smoothly, which increases the difficulty and time cost of disassembly. Summary of the invention

[0004] The object of the present invention is to provide a drill rod assembly for a rotary drilling rig to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a rotary drilling rig drill rod assembly, comprising a drill rod and a drill bit, wherein a connector for connecting the drill rod and the drill bit is provided between the drill rod and the drill bit, and the connector comprises:

[0006] A plug-in column, the plug-in column is fixed to the bottom end of the drill rod, the center line of the plug-in column coincides with the center line of the drill rod, and the plug-in column is in the shape of a truncated cone with a larger top and a smaller bottom;

[0007] A connecting seat, the connecting seat is fixed to the top of the drill bit, and the connecting seat is provided with a plug-in slot adapted to the plug-in column;

[0008] A first transverse hole, the first transverse hole is formed on the plug-in column, and the first transverse hole is arranged perpendicular to the center line of the drill rod;

[0009] A second transverse hole, the second transverse hole is formed on a side wall of the connecting seat, and the second transverse hole transversely penetrates the plug-in slot;

[0010] When the plug-in column is plugged into the plug-in slot, the first transverse hole is aligned with the second transverse hole;

[0011] A transverse insertion rod is inserted into the first transverse hole and the second transverse hole.

[0012] Preferably, a plurality of raised ribs are evenly distributed on the outer wall of the plug-in column, and a rib groove matching the plurality of ribs is formed on the inner wall of the plug-in groove.

[0013] Preferably, two limiting blocks are symmetrically arranged on the side wall of the plug-in column, and limiting grooves matching with the two limiting blocks are opened on the inner wall of the plug-in groove.

[0014] Preferably, the transverse insertion rod comprises:

[0015] An outer support rod, the outer support rod is inserted into the first transverse hole and the second transverse hole, and the outer diameter of the outer support rod is adapted to the inner diameter of the first transverse hole and the second transverse hole;

[0016] A fixing head, the fixing head is fixed to one end of the outer support rod and is used to fix the outer support rod inside the first transverse hole and the second transverse hole;

[0017] An oil chamber, wherein the oil chamber is provided in the fixed head;

[0018] An inner support rod, the inner support rod is arranged inside the outer support rod, the inner support rod can slide axially inside the outer support rod, one end of the inner support rod passes through the outer support rod and is fixedly connected to a driving block;

[0019] An oil pressure plate, wherein the oil pressure plate is slidably connected to the inside of the oil chamber, and the oil pressure plate and the oil chamber enclose an oil storage space;

[0020] A square connecting rod is used to connect the oil pressure plate and the inner support rod.

[0021] Wherein, an annular oil groove is arranged between the fixed head and the outer support rod, and the oil groove is connected with the oil storage space through an oil channel.

[0022] Preferably, the oil storage space is filled with a sponge.

[0023] Preferably, oil flow grooves are provided inside the first transverse hole and the second transverse hole.

[0024] Preferably, a countersunk hexagonal hole is provided on the end surface of the driving block, and a through hole is provided on the driving block perpendicular to the axis of the inner support rod.

[0025] Preferably, sealing plates for sealing the second transverse hole are fixedly connected to both sides of the connecting seat by bolts.

[0026] Compared with existing technologies:

[0027] The present invention improves the connection efficiency and stability between the drill rod and the drill bit through the connector. It uses a truncated cone-shaped plug-in column and an adapter plug-in slot to closely match each other, ensuring coaxiality and improving the linear accuracy and overall quality of the drilling operation. At the same time, the introduction of the first and second transverse holes and the transverse rod locking mechanism achieves the dual advantages of quick locking and convenient disassembly. In the locked state, the transverse rod ensures a stable connection and meets the requirements of high-intensity operations; and when disassembling, the drill rod and the drill bit can be easily separated by simply pulling out the transverse rod, avoiding the problems of jamming or excessive friction that may be encountered in traditional disassembly methods.

[0028] The invention improves the lubrication performance and disassembly convenience of the drill rod and drill bit connection parts through the cross-insertion rod structure. The cross-insertion rod adopts an internal and external nesting design, combines the oil chamber and the sponge body to achieve automatic lubrication, effectively reduces the friction resistance during the plugging and unplugging process, and prolongs the service life of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a top view of the present invention.

[0031] Figure 3 For the present invention Figure 2 Sectional view at AA.

[0032] Figure 4 For the present invention Figure 3 Enlarged view of point B.

[0033] Figure 5 It is a cross-sectional exploded view of the plug-in column, the connecting seat and the horizontal plug-in rod of the present invention.

[0034] Figure 6 It is a cross-sectional exploded view of the outer support rod, the fixing head and the inner support rod of the present invention.

[0035] Figure 7 It is a cross-sectional exploded view of the connector and the connection seat of the present invention.

[0036] In the figure:

[0037] 1. Drill rod, 2. Drill bit;

[0038] 3. Connector;

[0039] 301, plug-in column, 3011, rib, 3012, limit block;

[0040] 302, connecting seat;

[0041] 303, plug-in slot, 3031, rib slot, 3032, limit slot;

[0042] 304, first transverse hole, 305, second transverse hole;

[0043] 306, horizontal insertion rod;

[0044] 3061, outer support rod, 3062, fixed head, 3063, oil chamber, 3064, inner support rod, 3065, driving block, 30651, through hole, 3066, oil pressure plate, 3067, square connecting rod, 3068, oil channel, 3069, oil tank;

[0045] 4. Fixing bolts. 5. Sponge body, 6. Oil flow groove, 7. Closing plate; DETAILED DESCRIPTION

[0046] The present invention is described below with specific embodiments, but they are not intended to be limiting of the invention.

[0047] Embodiment 1

[0048] like Figure 1-Figure 7 As shown, in this embodiment, a rotary drilling machine drill rod assembly is provided, including a drill rod 1 and a drill bit 2, a connector 3 for connecting the drill rod 1 and the drill bit 2 is arranged between the drill rod 1 and the drill bit 2, the connector 3 includes a plug-in column 301 and a connecting seat 302, the plug-in column 301 is fixed to the bottom end of the drill rod 1 by welding or bolting, the center line of the plug-in column 301 coincides with the center line of the drill rod 1, ensuring the coaxiality after connection, improving the linearity and accuracy of the drill hole, and the plug-in column 301 is in the shape of a truncated cone with a larger top and a smaller bottom; the connecting seat 302 is fixed to the top of the drill bit 2 by welding or bolting, and a plug-in groove 303 adapted to the plug-in column 301 is provided on the connecting seat 302; a first transverse hole 304 is provided on the plug-in column 301, and the first transverse hole 304 is arranged perpendicular to the center line of the drill rod 1; a second transverse hole 305 is provided on the side wall of the connecting seat 302, and the second transverse hole 305 transversely passes through the plug-in groove 303;

[0049] When the plug-in column 301 is inserted into the plug-in slot 303, the first transverse hole 304 and the second transverse hole 305 are aligned; a transverse insertion rod 306 is inserted into the first transverse hole 304 and the second transverse hole 305 to fix the plug-in column 301 in the plug-in slot 303;

[0050] By aligning the first transverse hole 304 with the second transverse hole 305 and inserting the transverse rod 306, the drill rod 1 and the drill bit 2 are quickly locked. Similarly, when disassembly is required, only the transverse rod needs to be pulled out, which is simple and quick to operate.

[0051] During disassembly, when the cross rod 306 is pulled out from the first transverse hole 304 and the second transverse hole 305, after the drill rod 1 and the drill bit 2 are pulled relative to each other, a gap is immediately generated between the outer wall of the plug-in column 301 and the inner wall of the plug-in slot 303, and the gap becomes larger and larger with the relative pulling, thereby reducing the resistance during disassembly, allowing the plug-in column 301 to be smoothly pulled out of the plug-in slot 303, avoiding damage caused by jamming or excessive friction, and then enabling the plug-in column 301 to be smoothly pulled out of the plug-in slot 303, thereby reducing the difficulty of disassembly.

[0052] Embodiment 2

[0053] like Figure 5-Figure 7 As shown, based on the first embodiment, in this embodiment, a plurality of raised ribs 3011 are evenly distributed on the outer wall of the plug-in column 301 , and a rib groove 3031 matching with the plurality of ribs 3011 is opened on the inner wall of the plug-in groove 303 .

[0054] After the plug-in column 301 is plugged into the plug-in slot 303, the rib 3011 is inside the rib groove 3031. The close fit between the rib 3011 and the rib groove 3031 effectively limits the relative rotation between the drill rod 1 and the drill bit 2. During the drilling process, it can ensure that the drill rod 1 and the drill bit 2 maintain a stable connection state, avoiding damage or precision reduction caused by asynchronous rotation. In addition to preventing rotation, the contact between the rib 3011 and the rib groove 3031 also increases the contact area between the plug-in column 301 and the plug-in slot 303, thereby improving the stability and strength of the connection. This allows the drill rod 1 and the drill bit 2 to maintain better integrity and reliability when subjected to large torque or impact force. The stable connection state helps to maintain the linearity and precision of the drill hole. Due to the close fit between the rib 3011 and the rib groove 3031, the drilling deviation caused by loose connection or offset is reduced, thereby improving the accuracy and efficiency of the drilling operation.

[0055] Two limiting blocks 3012 are symmetrically arranged on the side wall of the plug-in column 301 , and a limiting groove 3032 matched with the two limiting blocks 3012 is opened on the inner wall of the plug-in groove 303 .

[0056] When the plug-in column 301 is inserted into the plug-in slot 303, the stopper 3012 will first enter the stopper slot 3032 to guide and position the column; then, the rib 3011 and the rib slot 3031 will also smoothly engage, completing the connection between the drill rod 1 and the drill bit 2. The stopper 3012 and the stopper slot 3032 ensure that the plug-in column 301 can be accurately aligned when inserted into the plug-in slot 303. This precise alignment allows the rib 3011 to engage with the rib slot 3031 smoothly, reducing the risk of damage caused by misalignment of the rib 3011 and the rib slot 3031 during installation.

[0057] Embodiment 3

[0058] like Figure 3-Figure 7 As shown, on the basis of the above embodiment, in this embodiment, the number of the cross-insertion rods 306 can be set to two, and the plug-in column 301 and the plug-in slot 303 are correspondingly provided with two first transverse holes 304 and two second transverse holes 305, and the cross-insertion rod 306 includes an outer support rod 3061 and an inner support rod 3064, and the outer support rod 3061 is inserted into the first transverse hole 304 and the second transverse hole 305, and the outer diameter of the outer support rod 3061 is adapted to the inner diameter of the first transverse hole 304 and the second transverse hole 305; a fixing head 3062 is fixed at one end of the outer support rod 3061, as shown in FIG. Figure 5 As shown, the outer wall of the fixed head 3062 is provided with an external thread, and one end of the second transverse hole 305 is provided with an internal thread, and the external thread of the fixed head 3062 is meshed with the internal thread of the second transverse hole 305 (the number of turns of the thread should not be too many, for example: about five or six turns, so as to achieve rapid fixation of the fixed head 3062), which is used to fix the outer support rod 3061 inside the first transverse hole 304 and the second transverse hole 305; an oil chamber 3063 is opened in the fixed head 3062.

[0059] The inner support rod 3064 is arranged inside the outer support rod 3061, and the inner support rod 3064 and the outer support rod 3061 are arranged coaxially, and the inner support rod 3064 can slide axially inside the outer support rod 3061, and one end of the inner support rod 3064 passes through the outer support rod 3061 and is fixedly connected to the drive block 3065; the oil chamber 3063 is internally slidably connected to the oil pressure plate 3066, and the oil pressure plate 3066 and the oil chamber 3063 form an oil storage space, and the oil storage space is filled with a sponge 5. The sponge 5 serves as a storage medium for lubricating oil and has excellent oil absorption and oil retention capabilities. When the oil pressure plate 3066 squeezes the sponge 5, the sponge 5 can release the lubricating oil as needed to ensure sufficient lubrication; the oil pressure plate 3066 and the inner support rod 3064 are connected by a square connecting rod 3067, such as Figure 6 As shown, a square hole is provided on the side wall of the fixed head 3062 for the square connecting rod 3067 to pass through, and a recessed groove is provided at the end of the inner support rod 3064 for the end of the square connecting rod 3067 to be inserted into. A fixing bolt 4 is added, and the threaded end of the fixing bolt 4 is passed through the center of the oil pressure plate 3066 and the center of the square connecting rod 3067 in sequence and meshedly connected to the inner support rod 3064. In this way, the inner support rod 3064, the oil pressure plate 3066 and the square connecting rod 3067 can be connected as a whole by using the fixing bolt 4; when the driving block 3065 is driven to rotate, the set square connecting rod 3067 can make the cross-insertion rod 306 rotate as a whole.

[0060] An annular oil groove 3069 is provided between the fixed head 3062 and the outer support rod 3061 . The oil groove 3069 is connected to the oil storage space via an oil passage 3068 . The oil passage 3068 is provided on the side wall of the fixed head 3062 .

[0061] The first transverse hole 304 and the second transverse hole 305 have oil flow grooves 6 formed therein. When the first transverse hole 304 and the second transverse hole 305 are aligned, the oil flow grooves 6 on the first transverse hole 304 and the oil flow grooves 6 on the second transverse hole 305 are aligned.

[0062] A countersunk hexagonal hole is formed on the end surface of the driving block 3065 , and a through hole 30651 is formed on the driving block 3065 at a position perpendicular to the axis of the inner support rod 3064 .

[0063] When the driving block 3065 is driven to rotate by the countersunk hexagonal hole, the cross-insertion rod 306 slowly rotates out from the first transverse hole 304 and the second transverse hole 305. When the external thread of the fixed head 3062 is disengaged from the internal thread of the second transverse hole 305, the external rigid rod is inserted into the through hole 30651, and the cross-insertion rod 306 is pulled out by the external rigid rod.

[0064] When the cross rod 306 is pulled out from the first transverse hole 304 and the second transverse hole 305, due to the force on the driving block 3065, if the outer wall of the outer support rod 3061 and the first transverse hole 304 and the second transverse hole 305 generate a large friction force, the driving block 3065 will pull the inner support rod 3064 to slide relative to the outer support rod 3061. At the same time, the inner support rod 3064 pulls the oil pressure plate 3066 to slide in the oil chamber 3063 through the square connecting rod 3067. The oil pressure plate 3066 squeezes the oil in the oil storage space, causing the lubricating oil to enter the oil groove 3069 from the oil channel 3068, and then the oil flows from the oil groove 3069 to the oil flow groove 6, thereby realizing lubrication of the outer wall of the outer support rod 3061 and the first transverse hole 304 and the second transverse hole 305, thereby facilitating pulling the cross rod 306 out of the first transverse hole 304 and the second transverse hole 305.

[0065] In addition, the oil flow grooves 6 can be arranged along the length direction of the first transverse hole 304 and the second transverse hole 305 , and the number can be multiple.

[0066] like Figure 3 and Figure 5 As shown, sealing plates 7 for sealing the second transverse hole 305 are fixedly connected on both sides of the connecting seat 302 by bolts. When the transverse rod 306 is installed on the first transverse hole 304 and the second transverse hole 305, the sealing plate 7 is used to block the second transverse hole 305 to prevent mud, debris or other impurities from entering the hole during the drilling process.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A rotary drilling machine drill rod assembly, comprising a drill rod and a drill bit, wherein a connector for connecting the drill rod and the drill bit is provided between the drill rod and the drill bit, wherein the connector include: A plug-in column, which is fixed at the bottom end of the drill pipe, the center line of the plug-in column coincides with the center line of the drill pipe, and the plug-in column is in the shape of a truncated cone with a larger top and a smaller bottom; A connecting seat, which is fixed to the top of the drill bit and has a plug-in slot that matches the plug-in column; A first transverse hole, the first transverse hole is opened on the plug-in column, and the first transverse hole is arranged perpendicular to the center line of the drill rod; A second transverse hole is provided on the side wall of the connecting seat and extends transversely through the plug-in slot; When the plug-in column is plugged into the plug-in slot, the first transverse hole is aligned with the second transverse hole; A transverse insertion rod, the transverse insertion rod is inserted into the first transverse hole and the second transverse hole; The crossbar includes: An outer support rod, the outer support rod is inserted into the first transverse hole and the second transverse hole, and the outer diameter of the outer support rod is adapted to the inner diameter of the first transverse hole and the second transverse hole; A fixing head, which is fixed to one end of the outer support rod and is used to fix the outer support rod inside the first transverse hole and the second transverse hole; An oil chamber is provided in the fixed head; An inner support rod, the inner support rod is arranged inside the outer support rod, the inner support rod can slide axially inside the outer support rod, one end of the inner support rod passes through the outer support rod and is fixedly connected with a driving block; An oil pressing plate is slidably connected to the inside of the oil chamber, and the oil pressing plate and the oil chamber enclose an oil storage space; A square connecting rod connects the oil pressure plate and the inner support rod; Among them, an annular oil groove is arranged between the fixed head and the outer support rod, and the oil groove is connected with the oil storage space through an oil channel; The oil storage space is filled with sponge; Oil flow grooves are provided inside the first transverse hole and the second transverse hole.

2. A rotary drilling rig drill rod assembly according to claim 1, characterized in that: A plurality of raised ribs are evenly distributed on the outer wall of the plug-in column, and a rib groove matched with the plurality of ribs is opened on the inner wall of the plug-in groove.

3. A rotary drilling rig drill rod assembly according to claim 2, characterized in that: Two limiting blocks are symmetrically arranged on the side wall of the plug-in column, and limiting grooves matched with the two limiting blocks are opened on the inner wall of the plug-in groove.

4. The rotary drilling rig drill rod assembly according to claim 1, characterized in that: The end surface of the driving block is provided with a countersunk hexagonal hole, and the driving block is provided with a through hole perpendicular to the axis of the inner support rod.

5. The rotary drilling rig drill rod assembly according to claim 1, characterized in that: Sealing plates for sealing the second transverse hole are fixedly connected to both sides of the connecting seat by bolts.

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