Quick dismounting tool for plug-and-play drill rod

Abstract

The quick disassembling tool for the plug-in type drill rod at least comprises a fixing sleeve and a sliding sleeve arranged on the fixing sleeve in a sleeved mode, one end of the fixing sleeve is provided with an inner square hole, the other end of the fixing sleeve is provided with an installation cavity used for containing the drill rod and at least one groove hole communicated with the installation cavity, and a matched positioning element is installed in the groove hole. The positioning element has a first state in which the positioning element extends into the mounting cavity and enables the fixing sleeve and the drill rod to be locked and a second state in which the positioning element retreats from the mounting cavity and enables the fixing sleeve and the drill rod to be unlocked, and the sliding sleeve is configured to be capable of sliding relative to the fixing sleeve so as to drive the positioning element to be switched between the first state and the second state. The utility model has the advantages of plug-and-play, high rod dismounting efficiency, simple structure and low cost, and only needs to be installed once in the whole period of rod dismounting operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drilling construction engineering machinery technical field, concretely relates to a plug -in formula drill rod quick dismounting frock. BACKGROUND

[0002] In the field of drilling construction such as tunneling, open-pit and underground mining, in order to meet the diversified engineering needs, it is often necessary to carry out advanced geological exploration holes, blasting holes, pipe following drilling, grouting reinforcement holes and anchor cable support holes and other types of drilling operations. The depths of these drillings are quite different, with shallow ones only a few meters and deep ones up to hundreds of meters. When carrying out such deep hole construction, it is usually necessary to use multiple drill rods, which are connected in sections through threaded connection, thereby realizing the extension of the drilling. However, after the drilling operation is completed, each section of drill rod must be unscrewed and removed one by one for recovery, and the operation efficiency of this link plays a key role in restricting the overall construction efficiency.

[0003] Due to the limitations of the construction environment and the inherent defects of the traditional drilling machine power head design, there are obvious shortcomings in a large number of current equipment. The power head of many equipment only has a rotating drive function, but lacks drill rod clamping capability. This makes the rod dismounting process have to rely on manual assistance to complete a series of complex operations: the operator needs to frequently adjust the position of the power head, manually install and remove the relevant tools, and perform high-intensity physical labor in a narrow working space. This mode of operation not only has low efficiency, but also greatly increases the risk of operational errors due to frequent human-machine cooperation. Once operated improperly, it is easy to cause drill rod falling, thread slipping and other safety accidents, which will have a double negative impact on the integrity of the equipment and the construction progress.

[0004] Currently, there are some related patents for drill rod dismounting frock. Chinese patent CN214055129U discloses a deep hole drilling rod dismounting frock, which is composed of an upper pressure cover, a lower pressure cover and a rotating handle. When dismounting, the upper pressure cover is placed on the upper side of the outer circle of the drill rod, the lower pressure cover is placed on the lower side of the outer circle of the drill rod, the upper pressure cover and the lower pressure cover are locked by a plurality of fasteners, and the rotating handle is fixed on the upper side of the upper pressure cover. However, this frock has obvious technical defects, as it relies on multiple bolt fasteners to lock the pressure cover, which requires loosening these fasteners one by one when dismounting, undoubtedly increasing the operation steps and time consumption.

[0005] Chinese patent CN213953540U discloses a drill rod dismounting tool, which comprises a first clamping plate, a second clamping plate and a control mechanism. The first clamping plate and the second clamping plate are provided with clamping square structures matched with the drill rod and the stabilizing rod, for clamping the drill rod or the stabilizing rod through the clamping square structures. The control mechanism is connected with the first clamping plate and the second clamping plate, and can control the relative angle change of the two around the drill rod when the first clamping plate clamps the drill rod or the stabilizing rod and the second clamping plate clamps the stabilizing rod or the drill rod. However, the tool also has technical defects. The installation and dismounting process needs to accurately position the clamping structure and operate the locking bolt, which not only depends on manual skills, but also takes a long time. The existing drill rod dismounting tools all have the problems of poor structural applicability, repeated installation and dismounting, complex structure and repeated installation and dismounting. SUMMARY

[0006] The technical problem to be solved by the utility model is to provide an instant plug-in type drill rod quick dismounting tool which is installed on a drill connecting sleeve, is plug and play, needs to be installed only once in the whole cycle of rod dismounting operation, has high rod dismounting efficiency, simple structure and low cost.

[0007] To solve the above technical problems, the utility model provides a technical scheme of an instant plug-in type drill rod quick dismounting tool, which comprises at least a fixed sleeve and a sliding sleeve sleeved on the fixed sleeve. One end of the fixed sleeve is provided with an inner square hole, the other end is provided with an installation cavity for accommodating a drill rod, and at least one slot hole is in communication with the installation cavity. A matching positioning element is installed in the slot hole. The positioning element has a first state of extending into the installation cavity to lock the fixed sleeve and the drill rod, and a second state of withdrawing from the installation cavity to unlock the fixed sleeve and the drill rod. The sliding sleeve is configured to be slidable relative to the fixed sleeve, thereby driving the positioning element to switch between the first state and the second state.

[0008] In a preferred embodiment, the positioning element has an axial dimension greater than the depth of the slot hole.

[0009] In a preferred embodiment, the fixed sleeve has a positioning portion protruding outward from the outer peripheral surface of the end close to the inner square hole.

[0010] In a preferred embodiment, the slot holes are uniformly and spacedly distributed along the circumference of the fixed sleeve, and the slot hole close to the installation cavity is provided with a necked portion.

[0011] In a preferred embodiment, the positioning element is in the first state, the end of the positioning element close to the installation cavity abuts against the necked portion, and the other end is flush with the outer peripheral surface of the fixed sleeve.

[0012] In a preferred embodiment, the positioning element is located in the second state, one end of the sliding sleeve abuts against the positioning portion, the other end extends to the upper end surface of the positioning element, and a guide surface matched with the upper end surface of the positioning element is arranged.

[0013] In a preferred embodiment, the fixed sleeve is provided with an annular groove matched with the retainer ring, and the annular groove is communicated with the slot hole.

[0014] In a preferred embodiment, the distance between the upper end surface of the retainer ring and the central axis of the fixed sleeve is greater than the inner diameter of the sliding sleeve.

[0015] In a preferred embodiment, the mounting cavity is communicated with the inner square hole, and the cross section of the mounting cavity perpendicular to the extension direction of the fixed sleeve is greater than or equal to the cross section of the inner square hole.

[0016] In a preferred embodiment, the positioning element is a steel ball or a steel column.

[0017] Compared with the prior art, the plug-in type drill rod quick dismounting tool has the following beneficial effects:

[0018] (1) The plug-in type drill rod quick dismounting tool is used for being installed on a drilling machine connecting sleeve, and at least comprises a fixed sleeve and a sliding sleeve sleeved on the fixed sleeve, one end of the fixed sleeve is provided with an inner square hole matched with the output end of the drilling machine connecting sleeve, on the one hand, the installation is simple, and no complicated installation steps are needed, only the inner hole of the fixed sleeve needs to be aligned with the output end of the drilling machine connecting sleeve, and the tool can be used after being plugged in, and no additional conversion component is needed; on the other hand, the shape of the inner square hole can provide better centering and stability, prevent relative rotation between the tool and the drilling machine during the working process, ensure the accuracy and reliability of the dismounting and mounting operation, and ensure that the drilling machine connecting sleeve can efficiently transmit torque through the inner square hole.

[0019] The other end of the fixing sleeve is provided with a mounting cavity for accommodating the drill rod, allowing the drill rod to be quickly inserted, ensuring coaxiality during clamping, and at least one slot hole communicating with the mounting cavity, and a matched positioning element is installed in the slot hole, the positioning element has a first state of extending into the mounting cavity to lock the fixing sleeve and the drill rod, the locking mechanism can ensure that the drill rod is firmly fixed in the tooling, preventing the drill rod from loosening or falling off during disassembly and assembly, improving the safety and stability of operation. At the same time, the locking state can also ensure the coaxiality between the drill rod and the tooling, reduce vibration and wear caused by eccentricity, prolong the service life of the drill rod and the tooling, and the second state of the positioning element withdrawing from the mounting cavity to unlock the fixing sleeve and the drill rod. When the drill rod needs to be disassembled, the positioning element can be switched to the second state to withdraw from the mounting cavity, thereby unlocking the fixing sleeve and the drill rod. This unlocking mechanism allows the drill rod to be easily removed from the tooling, greatly improving the disassembly efficiency. Compared with the traditional disassembly method, the tooling realizes quick unlocking through the switching of the positioning element, reducing the time and labor intensity of manual operation.

[0020] The sliding sleeve is configured to be slidable relative to the fixing sleeve, thereby driving the positioning element to switch between the first state and the second state. This design allows the operator to simply slide to achieve locking and unlocking of the drill rod, without the need for complex tools or cumbersome operation steps, greatly improving the operation convenience and efficiency of the tooling. At the same time, the cooperation between the sliding sleeve and the fixing sleeve can adopt a high-precision guide structure to ensure the stability and accuracy of the sliding process, further improving the reliability and stability of the tooling.

[0021] (2) The plug-in type drill rod quick disassembly tooling of the utility model, the axial dimension of the positioning element along the slot hole is greater than the depth of the slot hole, adopting such a structural design, the positioning element has a certain activity allowance in the slot hole, while it can also ensure that it can stably play a role at a specific position. When the positioning element is in the locked state (first state), the part exceeding the depth of the slot hole can be embedded deeper into the related structure of the drill rod or the fixing sleeve, enhancing the locking firmness and preventing the drill rod from loosening accidentally during work. In the unlocked state (second state), the positioning element can also smoothly exit from the locked position, without being stuck or unable to be completely unlocked due to size limitations, improving the reliability and smoothness of the tooling operation.

[0022] The positioning part is formed on the outer circumferential surface of one end of the fixed sleeve close to the inner hole, and provides a clear positioning reference for the sliding sleeve. When the sliding sleeve slides to abut against the positioning part, the position of the sliding sleeve can be accurately determined, so that the positioning element is ensured to be in the correct unlocking or locking state. This helps to improve the accuracy and consistency of operation, and avoids the situation that the positioning element cannot work normally due to inaccurate position of the sliding sleeve. Meanwhile, the positioning part can also enhance the structural strength of the fixed sleeve, preventing deformation of the fixed sleeve at this part during frequent operation.

[0023] (3) The quick disassembly tool for plug-in type drill pipe of the utility model, the slot holes are uniformly distributed along the circumference of the fixed sleeve, and the uniformly distributed slot holes can uniformly bear the force of the plurality of positioning elements around the fixed sleeve, ensure that the drill pipe is uniformly locked in the tool, improve the stability and concentricity of the drill pipe installation, and reduce vibration and wear caused by uneven force.

[0024] (4) The quick disassembly tool for plug-in type drill pipe of the utility model further comprises a retaining ring, the fixed sleeve is provided with an annular groove matched with the retaining ring, and the annular groove is in communication with the slot hole. The retaining ring and the annular groove are matched to axially limit the positioning element installed in the slot hole, prevent the positioning element from excessively moving in the axial direction in the slot hole and separating from the slot hole, and ensure that the positioning element always stably works in the slot hole. The distance between the upper end surface of the retaining ring and the central axis of the fixed sleeve is greater than the inner diameter of the sliding sleeve, which can prevent the sliding sleeve from interfering with the retaining ring during sliding, ensure that the sliding sleeve can smoothly slide on the fixed sleeve, and limit the sliding range of the sliding sleeve, so that the sliding sleeve cannot slide out of the fixed sleeve, and the stability and reliability of the tool are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is an overall installation structure schematic view of the embodiment of the quick disassembly tool for plug-in type drill pipe of the utility model.

[0026] Figure 2 It is a fixed sleeve structure schematic view of the embodiment of the quick disassembly tool for plug-in type drill pipe of the utility model.

[0027] Figure 3 It is another angle structure schematic view of the fixed sleeve of the embodiment of the quick disassembly tool for plug-in type drill pipe of the utility model.

[0028] Figure 4 Structure diagram of another angle of the sliding sleeve of the embodiment of the quick dismounting tool for the plug-in type drill rod of the utility model;

[0029] Figure 5 Structure diagram of another angle of the sliding sleeve of the embodiment of the quick dismounting tool for the plug-in type drill rod of the utility model.

[0030] Explanation of reference signs:

[0031] 1-fixed sleeve;11-inner square hole;12-mounting cavity;13-groove hole;131-necked opening;14-positioning element;15-positioning part;16-annular groove;

[0032] 2-sliding sleeve;21-guiding surface;

[0033] 3-retaining ring;

[0034] 4-drill rig connecting sleeve;

[0035] 5-drill rod. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0037] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0038] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, integrally connected, or detachably connected;It can be the communication inside two elements;It can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] The embodiment of the utility model is a plug-in type drill rod quick dismounting tool, as shown in the figure, which is used for mounting on the drill rig connecting sleeve 4, and at least includes the fixed sleeve 1 and the sliding sleeve 2 sleeved on the fixed sleeve. Figure 1 As shown in the figure and Figure 2 and Figure 3As shown, the fixed sleeve has an inner square hole 11 at one end, which is matched with the output end of the drilling machine connecting sleeve 4. On the one hand, it is easy to install and does not need complicated installation steps. It only needs to align the inner square hole of the fixed sleeve with the output end of the drilling machine connecting sleeve, and then it can be used immediately without the need for additional conversion components. On the other hand, the shape of the inner square hole can provide better centring and stability, preventing relative rotation between the tooling and the drilling machine during operation, ensuring the accuracy and reliability of the disassembly and installation operation, and ensuring that the drilling machine connecting sleeve can efficiently transmit torque through the inner square hole.

[0040] In this embodiment, the inner square hole 11 is an inner square hole. The other end of the fixed sleeve is provided with a mounting cavity 12 for accommodating the drill rod, allowing the drill rod to be quickly inserted and ensuring coaxiality during clamping. Preferably, the mounting cavity 12 is in communication with the inner square hole 11, and the cross section of the mounting cavity perpendicular to the extension direction of the fixed sleeve is greater than or equal to the cross section of the inner square hole.

[0041] In this embodiment, the cross section of the mounting cavity 12 perpendicular to the extension direction of the fixed sleeve is the same as that of the inner square hole, and is greater than the cross section of the drill rod 5. The mounting cavity 12 and the inner square hole 11 are the same inner square hole, and the same set of tools and machining processes can be used during machining, and the machining of the mounting cavity and the inner square hole can be completed at the same time, greatly reducing the machining preparation time and processing cost.

[0042] The fixed sleeve 1 is provided with at least one slot hole 13 in communication with the mounting cavity, and a matching positioning element 14 is installed in the slot hole. The positioning element has a first state of extending into the mounting cavity to lock the fixed sleeve and the drill rod, and a second state of withdrawing from the mounting cavity to unlock the fixed sleeve and the drill rod. The sliding sleeve is configured to be slidable relative to the fixed sleeve, thereby driving the positioning element to switch between the first state and the second state. A matching positioning element is installed in the slot hole. The positioning element has a first state of extending into the mounting cavity to lock the fixed sleeve and the drill rod, and a second state of withdrawing from the mounting cavity to unlock the fixed sleeve and the drill rod. The locking mechanism can ensure that the drill rod is firmly fixed in the tooling, preventing the drill rod from loosening or falling off during disassembly and installation, improving the safety and stability of the operation. At the same time, the locking state can also ensure the coaxiality between the drill rod and the tooling, reduce the vibration and wear caused by eccentricity, and prolong the service life of the drill rod and the tooling. When the drill rod needs to be disassembled, the positioning element can be switched to the second state to withdraw from the mounting cavity, thereby unlocking the fixed sleeve and the drill rod. This unlocking mechanism allows the drill rod to be easily removed from the tooling, greatly improving the disassembly efficiency. Compared with the traditional disassembly method, this tooling realizes quick unlocking through the switching of the positioning element, reducing the time and labor intensity of manual operation.

[0043] The sliding sleeve is configured to be slidable relative to the fixed sleeve, so as to drive the positioning element to switch between the first state and the second state. This design enables the operator to realize the locking and unlocking of the drill rod through simple sliding operation, without the need to use complex tools or perform complicated operation steps, thereby greatly improving the operation convenience and use efficiency of the tooling. Meanwhile, the cooperation between the sliding sleeve and the fixed sleeve can adopt a high-precision guide structure, so as to ensure the stability and accuracy of the sliding process, and further improve the reliability and stability of the tooling.

[0044] In the embodiment, the drill rod is provided with a positioning groove, the positioning element is in the first state, the end of the positioning element close to the installation cavity is inserted into the installation cavity and embedded in the positioning groove, so as to lock the fixed sleeve and the drill rod; the positioning element is in the second state, the end of the positioning element close to the installation cavity is separated from the positioning groove and exits the installation cavity, so as to unlock the fixed sleeve and the drill rod.

[0045] Preferably, the positioning element 14 has an axial dimension greater than the depth of the slot hole. With such a structural design, the positioning element has a certain activity allowance in the slot hole, while it can stably play a role in a specific position. When the positioning element is in the locked state (the first state), the part exceeding the depth of the slot hole can be embedded more deeply in the related structure of the drill rod or the fixed sleeve, so as to enhance the locking firmness and prevent the drill rod from loosening accidentally during work. When the positioning element is in the unlocked state (the second state), the positioning element can also smoothly exit from the locked position, without being stuck or unable to be completely unlocked due to size limitation, thereby improving the reliability and fluency of the tooling operation.

[0046] Preferably, the slot holes 13 are uniformly and spacedly distributed along the circumference of the fixed sleeve. The uniformly distributed slot holes can enable the multiple positioning elements to be uniformly stressed around the fixed sleeve, so as to ensure that the drill rod is uniformly locked in the tooling, improve the stability and concentricity of the drill rod installation, and reduce vibration and wear caused by uneven stress. The end of the slot hole 13 close to the installation cavity is provided with a necking 131, which can limit and guide the positioning element. When the positioning element is in the locked state, the necking can prevent the positioning element from excessively extending into the installation cavity, so as to avoid damage caused by excessive extrusion of the positioning element with the drill rod or the fixed sleeve. Meanwhile, the necking can also guide the positioning element to accurately move in the slot hole, so as to improve the stability and reliability of the movement of the positioning element. In the embodiment, the installation cavity has the same cross section as the inner square hole, and the slot holes 13 are uniformly arranged as four, with one slot hole on each side of the quadrilateral.

[0047] The fixed sleeve 1 is outwardly convex at the outer peripheral surface near one end of the inner hole to form a positioning portion 15. The positioning portion provides a clear positioning reference for the sliding sleeve. When the sliding sleeve is in abutment with the positioning portion, the position of the sliding sleeve can be accurately determined, thereby ensuring that the positioning element is in the correct unlocking or locking state. This helps to improve the accuracy and consistency of the operation and avoids the situation where the positioning element cannot work normally due to inaccurate positioning of the sliding sleeve. At the same time, the positioning portion can also enhance the structural strength of the fixed sleeve and prevent deformation of the fixed sleeve at this portion during frequent operation.

[0048] In this embodiment, as shown in Figure 1 , Figure 4 and Figure 5 , the positioning element 14 is in the first state, with one end of the positioning element in abutment with the necked portion 131 near the one end of the installation cavity 12 and the other end flush with the outer peripheral surface of the fixed sleeve 1. In the second state, one end of the sliding sleeve 2 is in abutment with the positioning portion 15 and the other end extends to the upper end surface of the positioning element. The sliding sleeve is provided with a guide surface 21 that is adapted to the upper end surface of the positioning element. When the sliding sleeve is in abutment with the positioning portion, the position of the sliding sleeve can be accurately determined, thereby ensuring that the positioning element completely exits the installation cavity and the drill rod is unlocked. The extension of the sliding sleeve to the upper end surface of the positioning element and the provision of the guide surface can smoothly drive the positioning element to move during the sliding of the sliding sleeve by the cooperation of the guide surface and the upper end surface of the positioning element, thereby reducing the friction and wear of the positioning element during movement and improving the service life of the tool and the smoothness of the operation.

[0049] As shown in Figure 1 , the plug-and-play drill rod quick disassembly tool of this embodiment also includes a retaining ring 3. The fixed sleeve 1 is provided with an annular groove 16 that is adapted to the retaining ring and is in communication with the slot hole 13. The cooperation of the retaining ring and the annular groove provides an axial limiting action on the positioning element installed in the slot hole, thereby preventing the positioning element from excessively moving in the axial direction and disengaging from the slot hole, and ensuring that the positioning element always works stably in the slot hole.

[0050] Preferably, the distance between the upper end surface of the retaining ring 3 and the central axis of the fixed sleeve 1 is greater than the inner diameter of the sliding sleeve 2. On the one hand, this can prevent interference between the sliding sleeve and the retaining ring during sliding, thereby ensuring that the sliding sleeve can smoothly slide on the fixed sleeve. On the other hand, the limiting action of the retaining ring on the sliding range of the sliding sleeve can ensure that the sliding sleeve does not slide out of the fixed sleeve, thereby avoiding the situation where the sliding sleeve and the fixed sleeve are separated, and further improving the stability and reliability of the tool.

[0051] Preferably, the positioning element 14 is a steel ball or a steel column.

[0052] The disassembly method of the plug-and-play drill rod quick disassembly tool of this embodiment includes the following steps:

[0053] Step S1, drive the drilling machine to rotate reversely, so that the output end of the drilling machine connecting sleeve is separated from the drill pipe 5;

[0054] Step S2, insert the inner hole 11 of the fixing sleeve 1 into the output end of the drilling machine connecting sleeve 4;

[0055] Step S3, insert the drill pipe 5 into the installation cavity of the fixing sleeve 1, and drive the sliding sleeve 2 to slide relative to the fixing sleeve 1, so that the positioning element 14 is switched from the second state to the first state;

[0056] Step S4, the positioning element 14 is in the first state, and the fixing sleeve is locked with the drill pipe;

[0057] Step S5, clamp and fix the adjacent drill pipe of the drill pipe to be disassembled;

[0058] Step S6, drive the drilling machine to rotate reversely, so that the output end of the drilling machine connecting sleeve drives the drill pipe 5 to rotate relative to the adjacent drill pipe through the fixing sleeve 1, so that the drill pipe 5 is separated from the adjacent drill pipe;

[0059] Step S7, drive the sliding sleeve 1 to slide relative to the fixing sleeve 1, so that the positioning element 14 is switched from the first state to the second state;

[0060] Step S8, the positioning element 14 is in the second state, and the fixing sleeve is unlocked with the drill pipe;

[0061] Step S9, repeat the above steps to disassemble the adjacent drill pipe.

[0062] In summary, the above only describes the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A plug-and-play type of quick disassembly tooling for drill pipe, characterized by: The device comprises a fixed sleeve (1) and a sliding sleeve (2) sleeved on the fixed sleeve, the fixed sleeve is provided with an inner square hole (11) at one end and a mounting cavity (12) for accommodating a drill rod at the other end, and at least one slot hole (13) is in communication with the mounting cavity, and a matched positioning element (14) is installed in the slot hole, the positioning element has a first state of extending into the mounting cavity to lock the fixed sleeve with the drill rod and a second state of withdrawing from the mounting cavity to unlock the fixed sleeve with the drill rod, and the sliding sleeve is configured to be slidable relative to the fixed sleeve to drive the positioning element to switch between the first state and the second state.

2. A quick release tool for drilling pipes according to claim 1, characterized in that: The positioning element (14) has an axial dimension greater than the depth of the slot hole.

3. A quick disconnect tool for drill pipe according to claim 1 or 2, characterised in that: The fixed sleeve (1) is outwardly protruded to form a positioning portion (15) on the outer peripheral surface near one end of the inner square hole.

4. A quick release tool for drilling pipes according to claim 3, characterized in that: The slot holes (13) are uniformly and spacedly distributed along the circumference of the fixed sleeve, and each slot hole is provided with a necked portion (131) near the mounting cavity.

5. A quick disconnect tool for drill pipe according to claim 4, wherein: When the positioning element (14) is in the first state, the end of the positioning element near the mounting cavity (12) abuts against the necked portion (131), and the other end is flush with the outer peripheral surface of the fixed sleeve (1).

6. A quick release tool for drilling pipes according to claim 4 or 5, characterized in that: When the positioning element (14) is in the second state, one end of the sliding sleeve (2) abuts against the positioning portion (15), and the other end extends to the upper end surface of the positioning element, and is provided with a guide surface (21) matched with the upper end surface of the positioning element.

7. A quick disconnect tool for drill pipe according to any one of claims 1-2 or 4-5, characterized in that: The device further comprises a retaining ring (3), and the fixed sleeve (1) is provided with an annular groove (16) matched with the retaining ring (3), and the annular groove is in communication with the slot hole (13).

8. A quick release tool for drilling pipes according to claim 7, characterized in that: The distance between the upper end surface of the retaining ring (3) and the central axis of the fixed sleeve (1) is greater than the inner diameter of the sliding sleeve (2).

9. A quick disconnect tool for drill pipe according to any one of claims 1-2, 4-5 or 8, characterised in that: The mounting cavity (12) is in communication with the inner square hole (11), and the cross section of the mounting cavity perpendicular to the extension direction of the fixed sleeve is greater than or equal to the cross section of the inner square hole.

10. A quick disconnect tool for drill pipe according to claim 9, wherein: The positioning element (14) is a steel ball or a steel column.

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