Quick-release joint drilling rig power head

Abstract

The invention relates to the technical field of coal mine drilling machines, and discloses a quick-release joint type drilling machine power head, comprising a gearbox, a main shaft, a connecting shaft, a water braid and a chuck, wherein the main shaft is arranged inside the gearbox, the connecting shaft is arranged inside the main shaft, the water braid is arranged at one end of the connecting shaft, the chuck is arranged at the end of the main shaft away from the water braid, the end of the chuck away from the water braid is provided with a front end cover, the chuck and the front end cover are jointly provided with an active drill rod, and the chuck can axially limit the active drill rod, the active drill rod comprises a rod body and a joint, both ends of the rod body are arranged as female joints, both ends of the joint are arranged as male joints, the front end cover can drive the rod body to rotate, the active drill rod is connected to the end of the connecting shaft away from the water braid, and the active drill rod can pass through the front end cover, the chuck and the main shaft; the active drill rod is arranged as a detachable rod body and joint, and both ends of the joint are arranged as male joints. When the male joint docking with the drill rod is damaged, the joint is replaced so that the male joint at the other end is docked with the drill rod, thereby extending the service life of the active drill rod.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine drilling rigs, in particular to a quick-release joint type drilling rig power head. Background Art

[0002] The active drill rod is an important part of the drilling rig power head that connects the drill rod. The power head transmits rotation and translation motion to the drill rod through the active drill rod, thereby realizing the transmission of drilling power and the connection and disconnection of the drill rod.

[0003] The existing patent (publication number: CN201062492Y) discloses a mining equipment, which includes a rod body, a drill rod upper joint, a drill rod lower joint and a drill rod connector. The drill rod upper joint and the drill rod lower joint are fixedly connected to the two ends of the rod body respectively. The end of the drill rod connector is provided with an external thread, the end of the drill rod upper joint is provided with an internal thread, and the drill rod connector is connected to the drill rod upper joint through a thread; the end of the drill rod lower joint is also provided with an internal thread; after a certain wear occurs on the lower part of the drill rod, the connecting thread between the drill rod connector and the drill rod joint can be opened, the drill rod can be replaced 180°, the worn section of the drill rod is replaced to the upper side, and the unworn section of the drill rod is replaced to the lower side, thereby ensuring the continued use of the drill rod. The utility model has the characteristics of reasonable structure, the drill rod can be used in two directions, the service life is extended, the utilization rate is improved, the production cost is reduced, and the like.

[0004] During the drilling and retracting process, the active drill rod needs to be connected and disconnected with each drill rod installed in or removed from the drilling rig. The frequency of use of its threaded joint is dozens or even hundreds of times that of ordinary drill rod joints. It is easy to wear during the use of the drilling rig, and the active drill rod needs to be replaced frequently. The existing active drilling rigs generally disassemble and assemble the active drill rod from the front end of the gearbox. Since the space from the front end of the chuck to the clamp is very limited and is generally located in the middle of the drilling rig, it is inconvenient to pull out the active drill rod and the connecting shaft. In addition, the active drill rod is a wearing part and needs to be replaced frequently, which seriously affects the construction efficiency. For this reason, we proposed a quick-release joint type drilling rig power head to solve the above problems. Summary of the invention

[0005] The present invention aims to provide a quick-release joint type drilling rig power head to solve the problem that the active drill rod is easy to wear, resulting in the need to frequently replace the active drill rod. Since the active drill rod is located in the middle of the drilling rig, it is inconvenient to replace it, which seriously affects the construction efficiency.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a quick-release joint type drilling rig power head, including a gearbox, a main shaft, a connecting shaft, a water braid and a chuck, the main shaft is arranged inside the gearbox, the connecting shaft is arranged inside the main shaft, the water braid is arranged at one end of the connecting shaft, the chuck is arranged at the end of the main shaft away from the water braid, the end of the chuck away from the water braid is provided with a front end cover, the chuck and the front end cover are jointly provided with an active drill rod, and the chuck can axially limit the active drill rod, the active drill rod includes a rod body and a joint, both ends of the rod body are arranged as female joints, both ends of the joint are arranged as male joints, the male joint can be threadedly connected with the female joint and the drill rod, the front end cover can drive the rod body to rotate, the active drill rod is connected to the end of the connecting shaft away from the water braid, and the active drill rod can pass through the front end cover, the chuck and the main shaft.

[0007] The beneficial effects of this solution are as follows: in a directional drilling rig power head disclosed in the existing patent (publication number: CN116905958A), when it is necessary to replace the active drill rod, the staff needs to first remove the front end cover and then unlock the active drill rod. Since one end of the connecting shaft is threadedly connected to the active drill rod and the other end is threadedly connected to the core shaft of the water braid, when the staff rotates the active drill rod to unlock it, the active drill rod and the connecting shaft cannot be accurately unlocked, and it is possible that the connecting shaft and the core shaft of the water braid are unlocked. Since the space from the front end of the chuck to the clamp is very limited, in the narrow operating space, even if the active drill rod is taken out alone, it will bring difficulty to the staff's operation. If the connecting shaft and the core shaft of the water braid are unlocked, the staff will It becomes very difficult for personnel to take out the active drill rod and the connecting shaft from the front end. At the same time, if it is necessary to switch to the chuck to clamp the salvage drill rod for work, the personnel need to remove the water braid from the rear end of the gearbox, take out the water braid and the connecting shaft from the rear end of the gearbox, and then remove the end cover to take out the active drill rod. In this process, it cannot be ensured that the connecting shaft is unlocked from the active drill rod. If the connecting shaft is unlocked from the core shaft of the water braid, the personnel also need to take out the active drill rod and the connecting shaft from the front end of the gearbox together before the salvage drill rod can be loaded into the chuck and switched to the chuck clamping for work. Therefore, whether it is to replace the active drill rod or to switch the chuck to clamp the salvage drill rod for work, it is very difficult in the prior art, which seriously affects the construction efficiency.

[0008] In this solution, the active drill rod is set as a detachable rod body and joint, and both ends of the joint are set as male joints, which can be threadedly connected with the female joint of the rod body. Therefore, when the male joint of the joint and the drill rod is damaged, the joint can be replaced, and the damaged male joint is threadedly connected to the female joint of the rod body, so that the male joint previously threadedly connected to the female joint of the rod body is connected to the drill rod, thereby extending the service life of the active drill rod. In addition, the active drill rod does not need to be removed for this operation, so the joint can be quickly replaced, which improves the construction efficiency. When it is necessary to switch to the chuck to clamp the salvage drill rod or the drill rod with different outer diameters for work, the staff only needs to loosen the chuck, and pull out the active drill rod, the connecting shaft and the water braid from the rear end of the gearbox, and then insert the salvage drill rod or the drill rod with different outer diameters into the main shaft from the rear end of the gearbox, and place the salvage drill rod or the drill rod with different outer diameters in the clamping range of the chuck, and then start the chuck to clamp the salvage drill rod or the drill rod with different outer diameters for work, thereby quickly completing the replacement of the active drill rod, and increasing the construction efficiency.

[0009] Preferably, as an improvement, the front end cover includes a fixed disk and an outer sleeve, the fixed disk is arranged at the end of the chuck away from the water braid, the outer sleeve is arranged in the middle of the fixed disk, and the inner wall of the outer sleeve is arranged in a polygonal shape, a stop block is provided on the outer wall of the active drill rod, and the stop block is clamped with the inner wall of the outer sleeve, and the diagonal distance of the stop block is smaller than the diameter of the chuck after it is loosened.

[0010] The beneficial effect is: the anti-rotation block on the outer wall of the active drill rod is clamped with the inner wall of the outer sleeve, so that the active drill rod and the front end cover remain relatively still, so that when the chuck drives the front end cover to rotate, the active drill rod rotates synchronously, and the diagonal distance of the anti-rotation block is smaller than the diameter of the chuck after it is loosened, which facilitates the removal of the active drill rod from the chuck.

[0011] Preferably, as an improvement, an inner sleeve is provided at one end of the fixed disk close to the chuck, and the inner sleeve is clamped with the end of the chuck away from the water braid, the outer wall of the outer sleeve is set to a polygon, and the inner wall of the outer sleeve is congruent and connected with the inner wall of the inner sleeve.

[0012] The beneficial effects are: by providing the inner sleeve, the clamping length of the rod body is extended, the stability of the active drill rod during rotation is increased, and at the same time the contact area with the rod body is increased, so that the force per unit area acting on the rod body is reduced, thereby extending the service life of the active drill rod.

[0013] Preferably, as an improvement, a limited position section is provided on the outer wall of the rod body, and the limited position section is located in the clamping range of the chuck.

[0014] The beneficial effect is that the rod body is limited by the mutual cooperation between the chuck and the limiting section, so as to prevent the active drill rod from axial displacement during drilling, thereby causing the water braid and the connecting shaft to be damaged by axial impact, thus affecting the construction efficiency.

[0015] Preferably, as an improvement, the diameter of the limiting section is smaller than the minimum diameter of the chuck after clamping.

[0016] The beneficial effect is that since the diameter of the limiting section is smaller than the minimum diameter after the chuck is clamped, the clamping force of the chuck will not directly act on the rod body, thus preventing the rod body from directly bearing the strong clamping force of the chuck and increasing the service life of the active drill rod.

[0017] Preferably, as an improvement, the outer diameter of the female connector and the distance between opposite sides of the stop block are both larger than the minimum diameter after the chuck is clamped.

[0018] The beneficial effect is that the rod body is axially limited by the female joint and the anti-rotation block without changing the structure of the rod body, that is, the overall strength of the rod body is not destroyed, and the rod body can be axially limited.

[0019] Preferably, as an improvement, the length of the limiting section is greater than the clamping width of the chuck, and the limiting section can float axially in the chuck.

[0020] The beneficial effect is that the length of the limit section is greater than the clamping width of the chuck, so that the rod body has a certain floating distance in the chuck, so as to alleviate the axial impact generated when the active drill rod is connected or disconnected with the drill rod, thereby protecting the active drill rod.

[0021] Preferably, as an improvement, a rear end cover is provided at the end of the main shaft close to the water braid, and the rear end cover includes an integrally formed connecting sleeve and an inner ring. The connecting sleeve is provided at the end of the main shaft close to the water braid, the inner ring is located in the middle of the connecting sleeve, and the core shaft of the water braid rotates through the inner ring and is connected to the connecting shaft.

[0022] The beneficial effect is that the end of the connecting sleeve close to the main shaft extends into the inside of the main shaft to prevent the connecting shaft from shaking too much when rotating and hitting the inner wall of the main shaft, thereby causing damage to the inner wall of the main shaft. The inner ring is used to reduce the shaking of the core shaft of the water braid when rotating, thereby preventing damage to the parts inside the water braid.

[0023] Preferably, as an improvement, the middle of the inner ring is provided with a hexagonal hole, and the outer wall of the core shaft of the water braid is provided with a hexagonal

[0024] The beneficial effect is that the inner ring is clamped with the core shaft of the water braid, so that the overall rotation of the core shaft, the connecting shaft and the active drill rod is more stable.

[0025] Preferably, as an improvement, a gap is provided between the inner ring and the connecting shaft.

[0026] The beneficial effect is that by setting a gap between the inner ring and the connecting shaft, the active drill pipe, the connecting shaft and the core shaft of the water braid can have a certain axial floating space as a whole, thereby further alleviating the axial impact generated when the active drill pipe and the drill pipe are connected or disconnected, and preventing the connecting shaft from hitting the inner ring and causing damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a power head according to an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the structure of a rear end cover according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic structural diagram of a gap M according to an embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of an active drill rod according to an embodiment of the present invention;

[0031] Figure 5 It is a projection diagram of the distribution of the fastening glue after the joint is tightened according to the embodiment of the present invention;

[0032] Figure 6 It is a schematic structural diagram of the front end cover and the inner sleeve according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The figure marks in the drawings of the specification include: active drill rod 1, rod body 101, joint 102, female joint 103, stop block 104, limit section 105, connecting shaft 2, water braid 3, front end cover 4, fixed plate 401, outer sleeve 402, inner sleeve 403, chuck 5, main shaft 6, gearbox 7, rear end cover 8, connecting sleeve 9, inner ring 10.

[0035] Example

[0036] The embodiment is basically as shown in the attached Figure 1-6 As shown, Figure 1 The quick-release joint type drilling rig power head shown includes a gearbox 7, a main shaft 6, a connecting shaft 2, a water braid 3 and a chuck 5. The main shaft 6 is rotatably installed inside the gearbox 7, and the gearbox 7 can drive the main shaft 6 to rotate. The connecting shaft 2 is rotatably installed inside the main shaft 6. The right end of the connecting shaft 2 is set as an external thread, and the left end is set as a female thread. The left end of the main shaft 6 is provided with a rear end cover 8, and the rear end cover 8 includes an integrally formed connecting sleeve 9 and an inner ring 10, as shown in FIG. Figure 2As shown, the connecting sleeve 9 is symmetrically provided with waist-shaped holes, and the connecting sleeve 9 is fixedly installed on the left end of the main shaft 6 through bolts and the waist-shaped holes. The inner ring 10 is located in the middle of the connecting sleeve 9, and the core shaft of the water braid 3 rotates through the inner ring 10 and is threadedly connected with the left end of the connecting shaft 2. The middle of the inner ring 10 is set as a hexagonal hole, and the outer wall of the core shaft of the water braid 3 is set as a hexagonal shape that is clamped with the hexagonal hole. A gap M is set between the inner ring 10 and the connecting shaft 2, as shown in FIG. Figure 3 As shown, the chuck 5 is fixedly mounted on the right end of the spindle 6 by bolts. Figure 1 As shown, the chuck 5 is set as a normally open chuck, and the right end of the chuck 5 is provided with a front end cover 4. The chuck 5 and the front end cover 4 are rotatably mounted with an active drill rod 1, and the active drill rod 1 includes a rod body 101 and a joint 102. Figure 4 As shown, both ends of the rod body 101 are configured as female joints 103, and both ends of the joint 102 are configured as male joints. The male joint can be threadedly connected with the female joint 103 and the drill rod. Of course, when the joint 102 is threadedly connected with the rod body 101, a fastening glue can be applied to the male joint of the joint 102 along an axial straight line, and then the fastening glue is symmetrically applied to the other side of the same male joint. When the male joint of the joint 102 is tightened with the female joint 103 of the rod body 101, the fastening glue on the outer wall of the male joint will contact the thread of the female joint 103 of the rod body 101, and the fastening glue on both sides will be spread along the direction of rotation of the male joint, forming a trapezoidal adhesive tape projected on the side of the joint 102 as wide on the left and narrow on the right. Figure 5 As shown, the trapezoidal tape, which is wider on the left and narrower on the right, complements the strength of the force on the male joint thread itself, so that the force on the male joint thread is more uniform, increasing the strength of the threaded connection between the joint 102 and the rod body 101, and preventing the joint 102 from being disconnected from the rod body 101 when the joint 102 and the drill rod are detached. At the same time, the joint 102 of the trapezoidal adhesive tape intersects with the joint 102 coated with fastening glue for easier disassembly. The outer diameter of the female joint 103 is smaller than the diameter after the chuck 5 is loosened, and the front end cover 4 can drive the active drill rod 1 to rotate. The front end cover 4 includes a fixed plate 401 and an outer sleeve 402. Figure 6 As shown, the fixed plate 401 is set as a flange plate and is fixedly installed on the front end of the chuck 5 by bolts, the outer sleeve 402 is fixedly installed in the middle of the front end of the fixed plate 401, and the inner wall of the outer sleeve 402 is set as a hexagon, and the inner sleeve 403 is fixedly installed in the middle of the rear end of the fixed plate 401. The outer wall of the outer sleeve 402 is set as a hexagon, and the inner sleeve 403 is clamped with the front end of the chuck 5. The inner wall of the outer sleeve 402 is congruent with the inner wall of the inner sleeve 403 and is connected. The outer wall of the active drill rod 1 is fixedly installed with a rotation stop block 104, as shown in FIG. Figure 4 As shown, the anti-rotation block 104 is engaged with the inner wall of the outer sleeve 402, and the diagonal distance of the anti-rotation block 104 is smaller than the diameter of the chuck 5 after it is loosened;

[0037] The outer wall of the active drill pipe 1 is provided with a limiting section 105. Figure 4As shown, the limit section 105 is located between the female connector 103 and the stop block 104, and the limit section 105 is located in the clamping range of the chuck 5. The diameter of the limit section 105 is smaller than the minimum diameter of the chuck 5 after clamping. The outer diameter of the female connector 103 and the distance between the opposite sides of the stop block 104 are both larger than the minimum diameter after clamping the chuck 5. The length of the limit section 105 is larger than the clamping width of the chuck 5, so that the limit section 105 has a certain axial float in the chuck 5.

[0038] The specific implementation process is as follows:

[0039] When the joint 102 is damaged, the staff can replace the joint 102, threadably connect the damaged male joint to the female joint 103 of the rod body 101, and dock the male joint that was previously threadably connected to the female joint 103 of the rod body 101 with the drill rod, thereby extending the service life of the active drill rod 1. When the male joints at both ends of the joint 102 are damaged, the staff only needs to replace a new joint 102 without removing the active drill rod 1, thereby quickly replacing the joint 102 and improving construction efficiency.

[0040] When it is necessary to switch to the chuck 5 to clamp the salvaged drill rod or the drill rod of different outer diameter for work, the staff only needs to loosen the chuck 5 and remove the rear end cover 8 from the rear end of the main shaft 6. At this time, the staff can pull out the active drill rod 1, the connecting shaft 2 and the water braid 3 connected as a whole from the main shaft 6 at the rear end of the gearbox 7, and then insert the salvaged drill rod or the drill rod of different outer diameter into the main shaft 6 from the rear end of the gearbox 7, and place the salvaged drill rod or the drill rod of different outer diameter in the clamping range of the chuck 5, and then start the chuck 5 to clamp the salvaged drill rod or the drill rod of different outer diameter for work, thereby quickly completing the replacement of the active drill rod 1, further increasing the construction efficiency.

[0041] The entire disassembly process is completed at the rear end of the gearbox 7 where there is ample space, and only the rear end cover 8 needs to be removed to remove the active drill rod 1, the connecting shaft 2 and the water braid 3 as a whole from the main shaft 6, which greatly reduces the operating difficulty of the staff and improves the construction efficiency.

[0042] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A quick-release joint type drilling rig power head, comprising a gearbox, a main shaft, a connecting shaft, a water braid and a chuck, wherein the main shaft is arranged inside the gearbox, the connecting shaft is arranged inside the main shaft, the water braid is arranged at one end of the connecting shaft, and the chuck is arranged at the end of the main shaft away from the water braid, characterized in that: A front end cover is provided at the end of the chuck away from the water braid, and an active drill rod is jointly provided at the chuck and the front end cover, and the chuck can axially limit the active drill rod. The active drill rod includes a rod body and a joint, both ends of the rod body are arranged as female joints, both ends of the joint are arranged as male joints, the male joint can be threadedly connected with the female joint and the drill rod, the front end cover can drive the rod body to rotate, the active drill rod is connected to the end of the connecting shaft away from the water braid, the active drill rod can pass through the front end cover, the chuck and the main shaft, and a stop block is provided on the outer wall of the active drill rod, and the outer diameter of the female joint and the opposite side distance of the stop block are both larger than the minimum diameter after the chuck is clamped.

2. The quick-release joint type drilling rig power head according to claim 1, characterized in that: The front end cover includes a fixed disk and an outer sleeve. The fixed disk is arranged at the end of the chuck away from the water braid, and the outer sleeve is arranged in the middle of the fixed disk. The inner wall of the outer sleeve is arranged in a polygonal shape, and the anti-rotation block is clamped with the inner wall of the outer sleeve. The diagonal distance of the anti-rotation block is smaller than the diameter of the chuck after it is loosened.

3. The quick-release joint type drilling rig power head according to claim 2, characterized in that: An inner sleeve is provided at one end of the fixed disk close to the chuck, and the inner sleeve is clamped with the end of the chuck away from the water braid. The outer wall of the outer sleeve is set to be polygonal, and the inner wall of the outer sleeve is congruent and connected with the inner wall of the inner sleeve.

4. The quick-release joint type drilling rig power head according to claim 3, characterized in that: A limited position section is provided on the outer wall of the rod body, the limited position section is located between the female joint and the anti-rotation block, and the limited position section is located in the clamping range of the chuck.

5. The quick-release joint type drilling rig power head according to claim 4, characterized in that: The length of the limiting section is greater than the clamping width of the chuck, and the limiting section can float axially in the chuck.

6. The quick-release joint type drilling rig power head according to claim 5, characterized in that: A rear end cover is provided at the end of the main shaft close to the water braid, and the rear end cover includes an integrally formed connecting sleeve and an inner ring. The connecting sleeve is provided at the end of the main shaft close to the water braid, the inner ring is located in the middle of the connecting sleeve, and the core shaft of the water braid rotates through the inner ring and is connected to the connecting shaft.

7. The quick-release joint type drilling rig power head according to claim 6, characterized in that: The middle part of the inner ring is arranged as a hexagonal hole, and the outer wall of the core shaft of the water braid is arranged as a hexagonal shape which is clamped with the hexagonal hole.

8. The quick-release joint type drilling rig power head according to claim 7, characterized in that: A gap is arranged between the inner ring and the connecting shaft.

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