Following pipe screwing device for drill jumbo

Abstract

A follow pipe screwing device for a drill jumbo relates to the technical field of drill jumbo and comprises a propelling beam and a drilling machine power assembly capable of feeding along the propelling beam. The device further comprises a centering device and a screwing device. A centering device used for centering the follow pipe is arranged on the propelling beam, the centering device comprises two supports, and openings used for supporting the follow pipe are formed in the tops of the supports; one bracket is correspondingly fastened and connected with one end, deviating from the drilling machine power assembly, of the propelling beam; the other support is in sliding fit with the propelling beam, and the support is correspondingly connected with a drilling machine power assembly in a fastening mode through a connecting rod; the output shaft of the drilling machine power assembly is coaxially connected with a conical screwing device, and the screwing device is provided with an open hole which is correspondingly coaxial with the output shaft of the drilling machine power assembly; the follow pipe butt joint device is simple in structure, an operator does not need to manually support continuously-connected follow pipes in the butt joint process, the butt joint difficulty of the follow pipes is lowered, and meanwhile the labor intensity of the operator is lowered.

Description

Technical Field

[0001] The utility model relates to the technical field of rock drilling trolleys, in particular to a heel pipe tightening device for a rock drilling trolley. Background Art

[0002] As is known, a rock drilling rig is a rock drilling device that adopts the drilling and blasting method in underground engineering. The application of the rock drilling rig greatly improves the excavation speed and mining efficiency, and reduces the labor intensity of workers. The current problem is that the operator needs to manually connect the follower pipe during the construction process. When connecting, the operator manually connects the follower pipe, aligns the connected follower pipe with the follower pipe that has been drilled into the rock wall, and then manually screws it so that the connected follower pipe is threadedly connected with the follower pipe that has been drilled into the rock wall. The labor intensity of the operator is high and the construction efficiency is low.

[0003] A Chinese patent (publication number: CN113775294A) discloses a construction device and method for a pipe-roof while drilling; the patent includes a pipe-roof pipe grabbing assembly, a crimping assembly and a root canal drill bit; the pipe-roof pipe grabbing assembly includes a rotating shaft, a power part and a first manipulator; the crimping assembly includes a crimping machine; the rock drill of the rock drilling trolley drives the drill rod to pass through the crimping machine and connect with the root canal drill bit, the pipe-roof pipe sleeve is arranged on the drill rod, the crimping machine crimps the root canal drill bit and the pipe-roof pipe together, and the pipe-roof pipe can be driven forward while the drill rod is drilling to achieve synchronous installation; however, in the actual construction process, it is found that the patent has a complex structure and a high cost of use, and the underground environment is usually harsh and the space is limited, and the manipulator is often unable to be used, and manual docking is still required. Therefore, it is necessary to develop a pipe-joining and tightening device with a simple structure and a small size. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a heel pipe tightening device for a rock drilling trolley.

[0005] In order to achieve the above-mentioned invention object, the utility model adopts the following technical solutions:

[0006] A follower pipe tightening device for a rock drilling rig is used for connecting the follower pipe, comprising a propulsion beam and a drilling rig power assembly capable of feeding along the propulsion beam; it also comprises a centering device and a tightening device; the propulsion beam is provided with a centering device for centering the follower pipe, the centering device comprises two brackets, and the top of the bracket is provided with an opening for supporting the follower pipe; one of the brackets is correspondingly and tightly connected to the end of the propulsion beam away from the drilling rig power assembly; the other bracket is slidably matched with the propulsion beam, and the bracket is correspondingly and tightly connected to the drilling rig power assembly through a connecting rod; the output shaft of the drilling rig power assembly is coaxially connected with a conical tightening device, and the tightening device is provided with an opening correspondingly and coaxially with the output shaft of the drilling rig power assembly.

[0007] Preferably, the tightening device includes a core shaft coaxially fastened to the output shaft of the drilling rig power assembly, the core shaft body is provided with an annular boss, the movable sleeve outside the annular boss is provided with a tapered sleeve, and the tapered sleeve and the annular boss are matched by splines; the annular boss corresponds to the small head end of the tapered sleeve at one end thereof and has a plurality of grooves arranged at intervals along the annular direction at a position corresponding to the tapered structure, a swelling block having one end slidingly adapted to the tapered structure of the annular boss is slidably fitted in the groove, the position of the tapered sleeve corresponding to the swelling block is provided with an annular groove, an annular spring for shrinking and resetting the swelling block is provided in the annular groove, and a clamping groove is provided at the position of the swelling block corresponding to the annular spring; a reset spring for resetting the swelling block is sleeved at one end of the core shaft corresponding to the small head end of the tapered sleeve.

[0008] Preferably, one end of the core shaft corresponding to the small end of the tapered sleeve is provided with a limiting member for preventing the tapered sleeve from falling off.

[0009] Preferably, a limiting boss is provided at the large end of the conical sleeve.

[0010] Preferably, the end of the expansion block away from the core shaft is provided with a chamfered structure.

[0011] Preferably, the top opening of the bracket is in a V-shaped structure or a U-shaped structure.

[0012] Due to the adoption of the above-mentioned technical solution, the utility model has the following beneficial effects:

[0013] The utility model discloses a follower pipe tightening device for a rock drilling trolley, which has a simple structure. A centering device for centering the follower pipe is provided on the pushing beam. When connecting the follower pipe, the operator can place the connected follower pipe into the openings of the two brackets, so that the connected follower pipe and the follower pipe that has been drilled into the rock wall can be automatically centered. During the docking process, the operator does not need to manually support the connected follower pipe, which reduces the difficulty of docking the follower pipes and reduces the labor intensity of the operator.

[0014] The tightening device includes a core shaft, and a movable sleeve outside the core shaft is provided with a tapered sleeve, and the tapered sleeve is slidably matched with a swelling block. The tapered sleeve can drive the swelling block to slide along the tapered structure of the annular boss toward the large end of the tapered knot of the annular boss, so that the swelling block extends out of the groove of the tapered sleeve, so that the swelling block can resist the inner wall of the connected follower pipe, ensuring that the tightening device can drive the connected follower pipe to rotate, thereby improving the efficiency of the follower pipe connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the tightening device;

[0017] Figure 3 is a cross-sectional view of the tightening device;

[0018] Figure 4 is a side view of the tightening device;

[0019] Figure 5 A schematic diagram of the structure of the mandrel;

[0020] Figure 6 It is a schematic diagram of the structure of the expansion block.

[0021] In the figure: 1. follow pipe; 2. push beam; 3. drilling rig power assembly; 4. bracket; 5. tightening device; 5-1. core shaft; 5-2. conical sleeve; 5-3. expansion block; 5-4. annular spring; 5-5. return spring; 5-6. limit member; 5-7. limit boss; 5-8. annular groove; 5-9. slot; 5-10. annular boss; 6. connecting rod. DETAILED DESCRIPTION

[0022] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0023] Embodiment 1, in combination with Figure 1 A follower pipe tightening device for a rock drilling rig is used to connect the follower pipe 1, comprising a propulsion beam 2 and a drilling rig power assembly 3 that can be fed along the propulsion beam 2; it also comprises a centering device and a tightening device 5; the propulsion beam 2 is provided with a centering device for centering the follower pipe 1, the centering device comprises two brackets 4, and the top of the bracket 4 is provided with an opening for supporting the follower pipe 1; one of the brackets 4 is correspondingly and tightly connected to the end of the propulsion beam 2 away from the drilling rig power assembly 3; the other bracket 4 is slidably matched with the propulsion beam 2, and the bracket 4 The connecting rod 6 is correspondingly and tightly connected to the drilling rig power assembly 3, that is, when the follower pipe 1 is connected, the operator can place the connected follower pipe 1 into the openings of the two brackets 4, so that the connected follower pipe 1 and the follower pipe 1 that has been drilled into the rock wall are automatically aligned. During the docking process, the operator does not need to manually support the connected follower pipe 1, which reduces the difficulty of docking the follower pipe 1 and reduces the labor intensity of the operator; according to needs, the top opening of the bracket 4 is a V-shaped structure or a U-shaped structure, which can effectively support the connected follower pipe 1;

[0024] The output shaft of the drilling rig power assembly 3 is coaxially connected with a conical tightening device 5, and the tightening device 5 is provided with an opening coaxial with the output shaft of the drilling rig power assembly 3, that is, a drill rod can be inserted into the opening, so that the drill rod and the drilling rig power assembly 3 are correspondingly threadedly connected, so that the drill rod and the drilling rig power assembly 3 can drive the drill rod to drill; when a follower pipe 1 is needed to be connected, the drilling rig power assembly 3 can be controlled to feed, so that the tightening device 5 is inserted into the follower pipe 1 to be connected, and then the drilling rig power assembly 3 is controlled to rotate, and the friction between the tightening device 5 and the inner wall of the follower pipe 1 to be connected drives the follower pipe 1 to rotate, so that the follower pipe 1 to be connected is threadedly screwed with the follower pipe 1 that has been drilled into the rock wall;

[0025] When in use, the operator first places the connected follower pipe 1 into the openings of the two brackets 4, controls the drilling rig power assembly 3 to feed, so that the tightening device 5 is inserted into the connected follower pipe 1, and then controls the drilling rig power assembly 3 to rotate, so that the connected follower pipe 1 is threadedly screwed with the follower pipe 1 that has been drilled into the rock wall; controls the drilling rig power assembly 3 to retreat, inserts the drill rod into the opening of the tightening device 5, and makes the drill rod and the drilling rig power assembly 3 correspondingly threadedly connected, and then the drilling rig power assembly 3 can be controlled to rotate to drive the drill rod to drill.

[0026] Embodiment 2: In actual use, it is found that in the process of connecting the follower pipe 1, the friction between the tightening device 5 and the connected follower pipe 1 is often insufficient, resulting in the tightening device 5 being unable to drive the connected follower pipe 1 to rotate, thereby reducing the efficiency of connecting the follower pipe 1. In order to solve this technical problem, this embodiment is further improved;

[0027] Combined with Figures 2 to 6 , a follower pipe tightening device for a rock drilling rig, which is different from Example 1 in that, on the basis of Example 1, the tightening device 5 comprises a core shaft 5-1 coaxially and tightly connected to the output shaft of the drilling rig power assembly 3, the core shaft 5-1 is provided with an annular boss 5-10, the outer movable sleeve of the annular boss 5-10 is provided with a tapered sleeve 5-2, and the tapered sleeve 5-2 and the annular boss 5-10 are matched by splines, that is, the core shaft 5-1 can drive the tapered sleeve 5-2 to rotate, and the tapered sleeve 5-2 can slide axially relative to the core shaft 5-1;

[0028] The end of the annular boss 5-10 corresponding to the small end of the tapered sleeve 5-2 is in a tapered structure, and the tapered sleeve 5-2 is provided with a plurality of slots spaced along the annular direction at positions corresponding to the tapered structure, and a bulging block 5-3 having one end slidably matched with the tapered structure of the annular boss 5-10 is slidably fitted in the slot, that is, the tapered sleeve 5-2 can drive the bulging block 5-3 to slide along the tapered structure of the annular boss 5-10 toward the large end of the tapered knot of the annular boss 5-10, so that the bulging block 5-3 extends out of the slot of the tapered sleeve 5-2, so that the bulging block 5-3 can contact the inner wall of the connected follower pipe 1, ensuring that the tightening device 5 can drive the connected follower pipe 1 to rotate;

[0029] The conical sleeve 5-2 is provided with an annular groove 5-8 at a position corresponding to the expansion block 5-3, and an annular spring 5-4 is provided in the annular groove 5-8 for shrinking and resetting the expansion block 5-3, and a clamping groove 5-9 is provided at a position corresponding to the annular spring 5-4 of the expansion block 5-3, and the annular spring 5-4 is clamped in the clamping groove 5-9, which can prevent the annular spring 5-4 from detaching from the expansion block 5-3 and avoid the annular spring 5-4 from contacting the inner wall of the heel tube 1, thereby protecting the annular spring 5-4; One end of the shaft 5-1 corresponding to the small end of the tapered sleeve 5-2 is sleeved with a reset spring 5-5 for resetting the tapered sleeve 5-2, that is, after the follow-up follower pipe 1 is screwed into the follower pipe 1 that has been drilled into the rock wall, the drilling rig power assembly 3 can be controlled to retreat, and the tapered sleeve 5-2 is reset to the left and right of the reset spring 5-5, and the expansion block 5-3 is retracted into the groove of the tapered sleeve 5-2 under the action of the annular spring 5-4. As the drilling rig power assembly 3 retreats, the tightening device 5 is separated from the follow-up follower pipe 1;

[0030] The end of the core shaft 5-1 corresponding to the small end of the tapered sleeve 5-2 is provided with a limiting member 5-6 for preventing the tapered sleeve 5-2 from falling off. The limiting member 5-6 can be a nut, a retaining spring or a limiting pin.

[0031] Embodiment 3, in actual use, it is found that in the process of connecting the follower pipe 1, the connected follower pipe 1 conflicts with the body of the tapered sleeve 5-2, which easily causes the internal thread of the connected follower pipe 1 to wear, thereby affecting the subsequent connection operation; in order to solve this technical problem, this embodiment is further improved;

[0032] Combined with Figures 2-3 , a follower pipe tightening device for a rock drilling rig, based on Example 2, a limiting boss 5-7 is provided at the large end of the tapered sleeve 5-2, that is, when the follower pipe 1 is connected, the port of the connected follower pipe 1 can be made to contact with the limiting boss 5-7, so that the tapered sleeve 5-2 can drive the expansion block 5-3 to slide along the tapered structure of the annular boss 5-10 toward the large end of the tapered knot of the annular boss 5-10, so that the expansion block 5-3 extends out of the slot of the tapered sleeve 5-2 and contacts with the inner wall of the connected follower pipe 1;

[0033] It should be noted that the end of the expansion block 5 - 3 away from the core shaft 5 - 1 is provided with a chamfered structure, which can prevent the expansion block 5 - 3 from causing damage to the inner wall of the heel tube 1 .

[0034] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended that all changes that fall within the meaning and scope of equivalent elements are included in the present invention.

Claims

1. A follower pipe tightening device for a rock drilling rig, used for connecting a follower pipe (1), comprising a propulsion beam (2) and a drilling rig power assembly (3) capable of feeding along the propulsion beam (2); the characteristics are: The invention also comprises a centering device and a tightening device (5); the propulsion beam (2) is provided with a centering device for centering the follower pipe (1), the centering device comprising two brackets (4), the top of the brackets (4) being provided with an opening for supporting the follower pipe (1); one of the brackets (4) is correspondingly and firmly connected to an end of the propulsion beam (2) away from the drilling rig power assembly (3); the other bracket (4) is slidably matched with the propulsion beam (2), and the bracket (4) is correspondingly and firmly connected to the drilling rig power assembly (3) via a connecting rod (6); the output shaft of the drilling rig power assembly (3) is coaxially connected with a conical tightening device (5), and the tightening device (5) is provided with an opening correspondingly and coaxially to the output shaft of the drilling rig power assembly (3).

2. The heel-tube tightening device for a rock drilling rig according to claim 1, characterized in that: The tightening device (5) comprises a core shaft (5-1) coaxially and tightly connected to the output shaft of the drilling rig power assembly (3); the core shaft (5-1) is provided with an annular boss (5-10) on its shaft body; a tapered sleeve (5-2) is provided on the outer movable sleeve of the annular boss (5-10); and the tapered sleeve (5-2) and the annular boss (5-10) are matched via splines; one end of the annular boss (5-10) corresponding to the small end of the tapered sleeve (5-2) is in a tapered structure; a plurality of slots are arranged at intervals along the annular direction at positions corresponding to the tapered structure, and the slots are slidably matched. An expansion block (5-3) has one end corresponding to the conical structure of the annular boss (5-10) for sliding adaptation, an annular slot (5-8) is provided at a position of the conical sleeve (5-2) corresponding to the expansion block (5-3), an annular spring (5-4) is provided in the annular slot (5-8) for causing the expansion block (5-3) to shrink and reset, and a clamping slot (5-9) is provided at a position of the expansion block (5-3) corresponding to the annular spring (5-4); and a reset spring (5-5) for causing the conical sleeve (5-2) to reset is sleeved on one end of the core shaft (5-1) corresponding to the small end of the conical sleeve (5-2).

3. The heel-tube tightening device for a rock drilling rig according to claim 2, characterized in that: One end of the core shaft (5-1) corresponding to the small end of the conical sleeve (5-2) is provided with a limiting member (5-6) for preventing the conical sleeve (5-2) from falling off.

4. The heel-tube tightening device for a rock drilling rig according to claim 2, characterized in that: A limiting boss (5-7) is provided at the large end of the conical sleeve (5-2).

5. The heel-tube tightening device for a rock drilling rig according to claim 2, characterized in that: An end of the expansion block (5-3) facing away from the core shaft (5-1) is provided with a chamfered structure.

6. The heel-tube tightening device for a rock drilling rig according to claim 1, characterized in that: The top opening of the bracket (4) is in a V-shaped structure or a U-shaped structure.

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