A vertical shaft rock debris retrieval device

Abstract

This utility model relates to the field of well cleaning technology and discloses a rock debris retrieval device for vertical shafts, including a grab head. The grab head is hinged to a mounting base at the top via a hinge rod. Multiple mounting frames are spaced apart along the circumferential direction on the outer side of the mounting base. A support part is slidably arranged inside the mounting frame, and a roller is rotatably arranged at the end of the support part. A drive ring is sleeved on the outside of the mounting base. The drive ring can be adjusted by moving along the axial direction of the mounting base. A drive block is arranged at the bottom of the drive ring corresponding to the support part. The end of the drive block that contacts the support part is set as an inclined surface. This utility model can guide the retrieval device during rock debris retrieval, reduce the occurrence of friction and jamming between the retrieval device and the well wall, ensure retrieval efficiency, and ensure the service life of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of well cleaning technology, and in particular to a rock debris retrieval device for vertical shafts. Background Technology

[0002] Currently, crowbar retrieval operations in vertical shafts commonly employ crowbar-equipped cone devices. However, existing crowbar structures suffer from insufficient guidance during the lifting process. Specifically, the crowbar lacks an effective guiding and limiting mechanism, causing it to easily rub against the shaft wall or even become stuck as it ascends within the shaft. This not only increases equipment wear and reduces retrieval efficiency but may also lead to deformation or damage of the crowbar due to repeated collisions, affecting operational safety. Therefore, there is an urgent need for a crowbar retrieval device that can provide guidance and reduce friction and sticking with the shaft wall. Utility Model Content

[0003] The purpose of this invention is to provide a rock debris retrieval device for vertical shafts, which can guide the retrieval device during rock debris retrieval, reduce the occurrence of friction and jamming between the retrieval device and the well wall, ensure retrieval efficiency, and ensure the service life of the equipment.

[0004] The present invention adopts the following technical solution:

[0005] A rock debris retrieval device for vertical shafts includes a grab head, which is hinged to a mounting base at the top via a hinge rod. Multiple mounting frames are spaced circumferentially along the outer side of the mounting base. A support portion is slidably disposed within each mounting frame, and a roller is rotatably disposed at the end of each support portion. A drive ring is sleeved on the outside of the mounting base, and the drive ring is adjustable by moving axially along the mounting base. A drive block is disposed at the bottom of the drive ring corresponding to the support portion, and the end of the drive block that contacts the support portion is beveled.

[0006] Preferably, both the mounting base and the drive ring have a circular cross-section.

[0007] Preferably, the drive ring is provided with a threaded sleeve, which is threadedly connected to a screw rod rotatably mounted on the mounting base.

[0008] Preferably, the mounting bracket consists of two symmetrically arranged mounting plates, and the support portion is slidably disposed between the two mounting plates.

[0009] Preferably, the support portion has a through groove running vertically through it, and the roller is rotatably disposed within the through groove.

[0010] Preferably, the support portion has grooves on both sides along its length, and the mounting plate has a roller shaft rotatably mounted on its inner wall, the roller shaft being movably located within the groove.

[0011] Preferably, the mounting plate has a through mounting hole, and the roller shaft passes through the fixing plate at the rear end of the mounting hole and is detachably connected to the mounting plate.

[0012] Preferably, ball bearings are movably disposed on the inclined surface of the drive block.

[0013] Compared with existing technologies, the advantages of this invention are as follows: By arranging multiple rollers around the mounting base, this invention effectively guides the retrieval device to rise steadily along the centerline of the shaft during the retrieval process through the contact between the rollers and the well wall, preventing the retrieval device from tilting or swaying and significantly reducing friction and collision with the well wall; ensuring a smooth lifting process for the retrieval device, thus improving the efficiency of rock debris retrieval and reducing safety risks caused by equipment jamming or deformation. The sliding arrangement of the support and mounting frame allows adjustment of the roller position according to the diameter of the shaft, expanding the applicability of this invention. Attached Figure Description

[0014] Figure 1 This is a front view of an embodiment of this application;

[0015] Figure 2 for Figure 1 Enlarged view of A in the middle;

[0016] Figure 3 This is a partial cross-sectional view of the support portion according to an embodiment of this application;

[0017] Figure 4 This is a top view of the mounting bracket and support portion according to an embodiment of this application. Detailed Implementation

[0018] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0019] like Figures 1 to 4As shown, the present invention discloses a vertical shaft rock debris retrieval device, including a grab head 1, which is hinged to a mounting base 3 at the top via a hinge rod 2. It is worth noting that this application only adjusts the guide structure at the top of the grab cone structure retrieval device in the prior art; the remaining structures are not improved. Since the remaining structures are relatively mature in the prior art, those skilled in the art can understand them through patent documents or physical objects, and therefore will not be described in detail here. Multiple mounting frames 4 are spaced circumferentially along the outer side of the mounting base 3, and supports are slidably arranged inside the mounting frames 4. Part 5, with rollers 6 rotatably mounted at its end, effectively guides the retrieval device to rise stably along the vertical shaft centerline by contacting the shaft wall, preventing deviation or swaying and significantly reducing friction and collision with the shaft wall. A drive ring 7 is sleeved on the outside of the mounting base 3. Both the drive ring 7 and the mounting base 3 preferably have circular cross-sections. The drive ring 7 can be adjusted axially along the mounting base 3. A drive block 8 is positioned at the bottom of the drive ring 7 corresponding to the support part 5. The ends of the drive block 8 that contact the support part 5 are both sloped, with the same slope. When the vertical shaft diameter is large and the position of the rollers 6 needs adjustment, the drive ring 7 can be adjusted downwards, using the drive slope of the drive block 8 to push the support part 5 outwards, thus achieving synchronous adjustment of multiple rollers 6 and effectively improving operational convenience. Preferably, ball bearings 9 are movably mounted on the slope of the drive block 8. The movable contact between the ball bearings 9 and the slope of the support part 5 reduces friction between the drive block 8 and the support part 5 during adjustment, reducing wear and extending their service life.

[0020] Specifically, a threaded sleeve 10 is provided on the drive ring 7. The threaded sleeve 10 is threadedly connected to a screw 11 rotatably mounted on the mounting base 3. By rotating the screw 11, the threaded sleeve 10 can drive the drive ring 7 to move up and down, thereby adjusting the position of the roller 6.

[0021] Furthermore, in this embodiment, the mounting frame 4 consists of two symmetrically arranged mounting plates, and the support portion 5 is slidably disposed between the two mounting plates. The support portion 5 has a through groove extending vertically, and a roller 6 is rotatably disposed within the through groove. Sliding grooves 12 are formed on both sides of the support portion 5 along its length. A roller shaft 13 is rotatably disposed on the inner wall of the end of the mounting plate away from the mounting base 3, and the roller shaft 13 is movably located within the sliding groove 12. The roller shaft 13 reduces friction between the support portion 5 and the mounting plate when sliding relative to the mounting frame 4. A mounting hole is formed through the mounting plate, and after the roller shaft 13 passes through the mounting hole, the end fixing plate is detachably connected to the mounting plate using bolts. This arrangement facilitates the replacement of the roller shaft 13 and also facilitates the disassembly of the support portion 5 from the mounting frame 4 by removing the roller shaft 13.

[0022] In use, this invention adjusts the position of the roller 6 by rotating the screw 11 according to the well wall diameter, ensuring it contacts the well wall. This contact effectively guides the retrieval device to rise and fall stably along the vertical shaft centerline, preventing it from tilting or swaying and significantly reducing friction and collision with the well wall. This ensures a smooth lifting process for the retrieval device, improving rock debris retrieval efficiency and reducing safety risks caused by equipment jamming or deformation. It is highly practical.

Claims

1. A rock debris retrieval device for vertical shafts, comprising a grab head, the grab head being hinged to a mounting base at the top via a hinge rod, characterized in that: Multiple mounting brackets are spaced apart along the circumferential direction on the outer side of the mounting base. A support portion is slidably arranged inside the mounting bracket, and a roller is rotatably arranged at the end of the support portion. A drive ring is sleeved on the outside of the mounting base. The drive ring can be adjusted by moving along the axial direction of the mounting base. A drive block is arranged at the bottom of the drive ring at a position corresponding to the support portion. The end of the drive block that contacts the support portion is set as an inclined surface.

2. The vertical shaft rock debris retrieval device according to claim 1, characterized in that: Both the mounting base and the drive ring have circular cross-sections.

3. The vertical shaft rock debris retrieval device according to claim 2, characterized in that: The drive ring is provided with a threaded sleeve, which is threadedly connected to a screw rod rotatably mounted on the mounting base.

4. The vertical shaft rock debris retrieval device according to claim 1, characterized in that: The mounting bracket consists of two symmetrically arranged mounting plates, and the support portion is slidably disposed between the two mounting plates.

5. The vertical shaft rock debris retrieval device according to claim 4, characterized in that: The support portion has a through groove running vertically through it, and the roller is rotatably disposed within the through groove.

6. The vertical shaft rock debris retrieval device according to claim 5, characterized in that: The support portion has grooves on both sides along its length, and a roller is rotatably mounted on the inner wall of the mounting plate, with the roller moving within the groove.

7. The vertical shaft debris retrieval device according to claim 6, characterized in that: The mounting plate has a through-hole, and the roller shaft passes through the fixing plate at the rear end of the mounting hole and is detachably connected to the mounting plate.

8. The vertical shaft rock debris retrieval device according to claim 1, characterized in that: The inclined surface of the drive block is provided with ball bearings.

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