Modularized rotary drilling rig drill rod connecting device

Abstract

The utility model relates to the technical field of drill rod, especially to a modular rotary drilling rig drill rod connecting device, including drill rod body, one end of drill rod body is provided with first flange plate, and is seted up in the inside of this end and has internal thread hole, the other end is provided with second flange plate, and is seted up in the end portion and has outer thread connecting rod, the outer thread connecting rod is screwed with the internal thread hole of another drill rod body, the outer end of outer thread connecting rod is seted up and has the limit hole of symmetrical distribution. Through adopting the double connecting mechanism of thread connection and mechanical limit locking, on the basis of realizing axial fastening through outer thread connecting rod and internal thread hole, further through adjusting screw drive extruding piece to push limit rod radial extension, clamps into the limit hole in the end of outer thread connecting rod, realizes the circumferential locking, this structure can effectively prevent the relative rotation and thread loosening of drill rod under high torque, strong vibration working condition, significantly promotes the stability and security of connection.

Description

Technical Field

[0001] This utility model relates to the field of drill rod technology, and in particular to a modular rotary drilling rig drill rod connection device. Background Technology

[0002] Rotary drilling rigs are a type of high-efficiency drilling equipment widely used in building foundation engineering, bridge pile foundations, subway tunnels and other fields. One of its core components is the drill rod assembly. Due to the typically large drilling depth, the drill rod adopts a multi-section modular design, which is connected section by section to form a complete drill rod system to achieve axial pressure and torque transmission.

[0003] Currently, the connection methods between drill rods of rotary drilling rigs mainly include two categories: keyway connection and threaded connection. Keyway connection has a complex structure and high manufacturing cost, and is prone to jamming or disengagement in deep holes or hard strata. While traditional threaded connection has a simple structure and is easy to install and disassemble, it has the following problems in high torque and strong vibration working environments: ordinary threads only provide axial fastening and cannot effectively prevent relative rotation between two drill rod sections, affecting power transmission efficiency, aggravating thread wear, and in severe cases, it can lead to loosening or even complete disengagement, posing a safety hazard.

[0004] Therefore, there is an urgent need to provide a modular rotary drilling rig drill rod connection device with a mechanical limit locking mechanism. Utility Model Content

[0005] To overcome the shortcomings of existing drill rod threaded connection methods, such as lack of effective circumferential locking, easy rotation, loosening and disengagement under high torque and strong vibration conditions, and potential safety hazards, this utility model provides a modular rotary drilling rig drill rod connection device with a mechanical limit locking mechanism.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: a modular rotary drilling rig drill rod connection device, comprising a drill rod body, a first flange at one end of the drill rod body with an internal threaded hole inside the flange, a second flange at the other end with an external threaded connecting rod, the external threaded connecting rod being threadedly engaged with the internal threaded hole of another drill rod body, the outer end of the external threaded connecting rod having symmetrically distributed limiting holes, a sliding groove at the inner end of the drill rod body near the internal threaded hole, symmetrically distributed limiting rods being slidably installed in the sliding groove, an elastic element being sleeved on the limiting rod, one end of the elastic element being connected to the limiting rod, and the other end being connected to the inner wall of the sliding groove, an adjusting screw being threadedly connected to the outer end of the drill rod body near the internal threaded hole, the inner end of the adjusting screw extending into the sliding groove area and rotatably connected to a pressing block.

[0007] Optionally, the end of the external threaded connecting rod is provided with a tapered boss, and the inner end of the internal threaded hole is provided with a tapered surface that matches the tapered boss.

[0008] Optionally, a hexagonal hole is provided at the top of the limiting rod.

[0009] Optionally, the outer surface of the extrusion block is a bevel, which contacts and engages with the end of the limiting rod.

[0010] Optionally, a first split locking sleeve and a second split locking sleeve are fitted around the outer periphery of one end of the two drill pipe bodies that are connected to each other. Multiple through holes are provided circumferentially on the first flange, the second flange, the first split locking sleeve and the second split locking sleeve. A fixing screw is inserted into the through hole, and a nut is threaded to the end of the fixing screw.

[0011] Optionally, the first split locking sleeve and the second split locking sleeve can be joined together to form a locking structure around the connection of the drill pipe body.

[0012] Compared with the prior art, the present invention has the following technical effects: 1. By adopting a dual connection mechanism of threaded connection and mechanical limit locking, on the basis of axial fastening through the external threaded connecting rod and the internal threaded hole, the limit rod is further pushed radially out by adjusting the screw to drive the extrusion block and lock into the limit hole at the end of the external threaded connecting rod to achieve circumferential locking. This structure can effectively prevent the drill rod from relative rotation and thread loosening under high torque and strong vibration conditions, and significantly improve the stability and safety of the connection.

[0013] 2. By setting a detachable split locking sleeve on the outer periphery of the connection part and fastening it into one piece with fixing screws and nuts, radial clamping force is applied to the connection area, which further improves the connection rigidity and prevents connection failure due to vibration or impact load, thus playing a double insurance role in mechanical anti-detachment. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a three-dimensional cross-sectional view of the drill rod, limiting rod, and extrusion block of this utility model.

[0016] Figure 3 This is a three-dimensional sectional view of the drill rod, second flange, and external threaded connecting rod of this utility model.

[0017] Figure 4 This is a three-dimensional sectional view of the limiting rod, adjusting screw, and extrusion block of this utility model.

[0018] Figure 5 This is a three-dimensional sectional view of the drill rod, the first flange, and the adjusting screw of this utility model.

[0019] Figure 6 This is a three-dimensional cross-sectional view of the first split locking sleeve, the second split locking sleeve, and the fixing screw of this utility model.

[0020] The labels in the diagram are as follows: 1-Drill pipe body, 2-First flange, 201-Second flange, 3-Internal threaded hole, 4-External threaded connecting rod, 5-Limiting hole, 6-Slide groove, 7-Limiting rod, 8-Elastic element, 9-Adjusting screw, 10-Extrusion block, 11-First split locking sleeve, 12-Second split locking sleeve, 1201-Through hole, 13-Fixing screw, 14-Nut. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0022] Example 1: Please refer to Figures 1-4 A modular rotary drilling rig drill rod connection device includes a drill rod body 1. One end of the drill rod body 1 is provided with a first flange 2, and an internally threaded hole 3 is formed inside this end. The other end is provided with a second flange 201, and an externally threaded connecting rod 4 is provided at this end. The externally threaded connecting rod 4 is threadedly engaged with the internally threaded hole 3 of the other drill rod body 1. A tapered boss is provided at the end of the externally threaded connecting rod 4. A tapered surface matching the tapered boss is provided in the inner end of the internally threaded hole 3 for guiding alignment and smooth screwing. Two symmetrically distributed limiting holes 5 are formed at the outer end of the externally threaded connecting rod 4. A groove 6 is provided at the inner end of the drill rod body 1 near the internally threaded hole 3. Two symmetrically distributed limiting rods 7 are slidably installed in the groove 6. The limiting rods 7 can extend and retract radially. Its end shape matches the limiting hole 5. An elastic element 8 is sleeved on the limiting rod 7. One end of the elastic element 8 is connected to the limiting rod 7, and the other end is connected to the inner wall of the slide groove 6 to provide a reset elastic force so that the limiting rod 7 is in a retracted state under normal conditions. An adjusting screw 9 is threadedly connected to the outer end of the drill rod body 1 near the internal threaded hole 3. A hexagonal hole is opened at the top of the limiting rod 7 to facilitate manual adjustment of the limiting state using a special tool. The inner end of the adjusting screw 9 extends into the area of ​​the slide groove 6 and is rotatably connected to the pressing block 10. The outer surface of the pressing block 10 is a bevel and contacts and cooperates with the end of the limiting rod 7. When the adjusting screw 9 is rotated, the pressing block 10 is driven to move axially. Through the action of the bevel, the limiting rod 7 is pressed to overcome the elastic force of the elastic element 8 and extend outward, and is locked into the limiting hole 5 of the external threaded connecting rod 4 to achieve circumferential locking.

[0023] When connecting drill rods, align the external threaded connecting rod 4 of one drill rod body 1 with the internal threaded hole 3 of the other drill rod body 1. Rotate to engage the threads. During this process, the tapered boss at the end of the external threaded connecting rod 4 guides the tapered surface inside the internal threaded hole 3, ensuring accurate alignment and preventing thread misalignment. Continue rotating the drill rod until the external threaded connecting rod 4 is fully screwed into the internal threaded hole 3, achieving axial fixation and initial connection. After the initial connection of the two sections is completed, rotate the adjusting screw 9 to push it axially inward, causing the pressing block 10 at its end to move synchronously. Because the pressing block 10 has an inclined surface structure, this inclined surface presses against the two symmetrical threads. The limiting rod 7 slides outward along the slide groove 6, compressing the elastic element 8. When the outer end of the limiting rod 7 is fully extended and embedded in the limiting hole 5 at the end of the external threaded connecting rod 4, circumferential locking is achieved, preventing relative rotation of the two drill rod sections during operation. The elastic element 8 provides continuous preload to prevent the limiting rod 7 from accidentally disengaging due to vibration. At the same time, the adjusting screw 9 can lock the position, further improving the connection reliability. When it is necessary to disassemble the drill rod, the adjusting screw 9 is rotated in the opposite direction to raise the extrusion block 10, releasing the inclined surface pressure. Under the action of the elastic element 8, the limiting rod 7 automatically retracts into the slide groove 6 and disengages from the limiting hole 5. Then, the two drill rod sections can be disassembled by rotating in the opposite direction.

[0024] Example 2: Based on Example 1, please refer to... Figure 5 and Figure 6 The outer periphery of one end of the two drill rod bodies 1 connected to each other is fitted with a first split locking sleeve 11 and a second split locking sleeve 12. The first split locking sleeve 11 and the second split locking sleeve 12 can be spliced ​​together and form a locking structure around the connection of the drill rod bodies 1 after splicing. The first flange 2, the second flange 201, the first split locking sleeve 11 and the second split locking sleeve 12 are provided with four through holes 1201 along the circumference. A fixing screw 13 is inserted into the through hole 1201 and a nut 14 is threaded to the end of the fixing screw 13.

[0025] After the two drill pipe sections are connected by threads and circumferentially locked by the limiting rod 7, the first split locking sleeve 11 and the second split locking sleeve 12 are assembled at the connection of the two drill pipe sections. Then, the fixing screw 13 is inserted into the through hole 1201 of the split locking sleeve, passes through the two flanges, and then comes out. Finally, the tightening nut 14 is screwed into the end of the fixing screw 13 to complete the fixing of the first split locking sleeve 11 and the second split locking sleeve 12. This tightens the first split locking sleeve 11 and the second split locking sleeve 12 at the connection of the drill pipe, thereby improving the connection rigidity, playing a mechanical anti-loosening role, and ensuring safety.

[0026] It should be understood that the above description is for illustrative purposes only and is not intended to limit the present invention. Those skilled in the art will understand that variations of the present invention will be included within the scope of the claims herein.

Claims

1. A modular rotary drilling rig drill rod connection device, comprising a drill rod body (1), wherein a first flange (2) is provided at one end of the drill rod body (1), and an internal threaded hole (3) is provided inside the first flange (201) at the second end, and an external threaded connecting rod (4) is provided at the second end, wherein the external threaded connecting rod (4) is threadedly engaged with the internal threaded hole (3) of another drill rod body (1), characterized in that: The outer end of the external threaded connecting rod (4) is provided with symmetrically distributed limiting holes (5). The inner end of the drill rod body (1) near the internal threaded hole (3) is provided with a sliding groove (6). The sliding groove (6) is slidably installed with symmetrically distributed limiting rods (7). An elastic element (8) is sleeved on the limiting rod (7). One end of the elastic element (8) is connected to the limiting rod (7), and the other end is connected to the inner wall of the sliding groove (6). The outer end of the drill rod body (1) near the internal threaded hole (3) is threadedly connected with an adjusting screw (9). The inner end of the adjusting screw (9) extends into the area of ​​the sliding groove (6) and is rotatably connected with a pressing block (10).

2. The modular rotary drilling rig drill rod connection device as described in claim 1, characterized in that: The end of the external threaded connecting rod (4) is provided with a tapered boss, and the inner end of the internal threaded hole (3) is provided with a tapered surface that matches the tapered boss.

3. The modular rotary drilling rig drill rod connection device as described in claim 2, characterized in that: The limiting rod (7) has a hexagonal hole at its top.

4. The modular rotary drilling rig drill rod connection device as described in claim 3, characterized in that: The outer surface of the extrusion block (10) is inclined and contacts the end of the limiting rod (7).

5. The modular rotary drilling rig drill rod connection device as described in claim 4, characterized in that: The two sections of the drill pipe body (1) are connected to each other. A first split locking sleeve (11) and a second split locking sleeve (12) are fitted on the outer periphery of one end. Multiple through holes (1201) are opened along the circumference of the first flange (2), the second flange (201), the first split locking sleeve (11) and the second split locking sleeve (12). A fixing screw (13) is inserted in the through hole (1201). A nut (14) is threaded to the end of the fixing screw (13).

6. The modular rotary drilling rig drill rod connection device as described in claim 5, characterized in that: The first split locking sleeve (11) and the second split locking sleeve (12) can be assembled front and back, and after assembly, they form a locking structure around the connection of the drill rod body (1).

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