Telescopic bucket bottom rotary excavating drilling tool

Abstract

The utility model discloses a telescopic bucket bottom rotary excavating drilling tool which comprises a telescopic bucket bottom drilling tool body, the telescopic bucket bottom drilling tool body comprises a connecting square, a barrel is fixedly connected to the lower portion of the connecting square, a vertical rod guide rod is connected into a cavity of the barrel, an unlocking device is arranged on the inner wall of the barrel, a vertical rod is embedded in the vertical rod guide rod, and a locking device is arranged on the inner wall of the vertical rod guide rod. The bottom of the vertical rod is connected with a fixed bottom, the fixed bottom is rotationally connected with a rotating bottom below the fixed bottom, drilling teeth are arranged at the bottom of the rotating bottom, and the telescopic bucket bottom rotary excavating drilling tool is connected with a drilling rod through a connecting part and a pin shaft; through the design of the telescopic bucket bottom, the soil unloading space is increased, the soil unloading resistance is reduced, and the soil unloading efficiency is high; key bars are arranged in the vertical rods and the guide rods, torque force transmission is achieved, and the bucket bottom is prevented from being damaged due to too large stress; the vertical rods and the guide rods are assembled in a modularized mode, and replacement and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to a telescopic bucket bottom rotary drilling tool, and particularly to the field of rotary drilling rig engineering construction technology. Background Technology

[0002] The mechanization rate of construction is increasing in the engineering construction field, and the rate of mechanized construction is also growing accordingly. Rotary drilling rigs are the most widely used in pile foundation construction. During rotary drilling, double-bottom sand-retrieving drill bits are commonly used for soil drilling. However, when encountering clay layers, difficulties in unloading soil often arise, leading to reduced construction efficiency. Although using other drilling tools such as auger drill bits and split drill bits can effectively improve work efficiency to some extent, it cannot fundamentally solve the problem of low construction efficiency. Therefore, there is an urgent need to design a drilling tool with high-efficiency soil unloading to improve work efficiency. Utility Model Content

[0003] This utility model provides a telescopic bucket bottom rotary drilling tool to overcome the shortcomings of low soil unloading efficiency of existing rotary drilling rigs.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model discloses a telescopic bucket bottom rotary drilling tool, including a telescopic bucket bottom drill tool. The telescopic bucket bottom drill tool includes a connecting unit, a cylinder is fixedly connected to the lower part of the connecting unit, a vertical rod guide rod is connected inside the cavity of the cylinder, and an unlocking device is provided on its inner wall. A vertical rod is embedded in the vertical rod guide rod, and a fixed bottom is connected to the bottom of the vertical rod. The fixed bottom is rotatably connected to a rotating bottom below it. The bottom of the rotating bottom is provided with drill teeth. The telescopic bucket bottom rotary drilling tool is connected to the drill rod through the connecting unit via a pin.

[0006] Furthermore, the connecting element includes a connecting element guide ring welded to its side wall and a top plate welded to the end face, and is connected to the cylinder by welding through the top plate, with stiffening ribs arranged on it for reinforcement.

[0007] Furthermore, the unlocking device includes a spring guide rod, with an upper limit ring and a lower limit ring respectively provided at both ends of the spring guide rod, a return spring sleeved in the middle, and a hook at the bottom.

[0008] Furthermore, the pole guide rod includes at least two pole guide rod key strips evenly distributed along the circumference at its lower end, and three limiting blocks are installed at its bottom. The limiting blocks are connected to the pole guide rod by fasteners.

[0009] Furthermore, a cylinder guide ring is provided on the inner wall of the cylinder, which, together with the connecting square guide ring, serves as a guide to ensure smooth and unobstructed movement of the upright guide rod up and down. A wedge-shaped notch is provided on the outer wall of the cylinder.

[0010] Furthermore, the upright has at least two key strips evenly distributed along the circumference, and three retaining rings are evenly welded to its top circumference. The retaining rings are used to ensure smooth assembly of the upright and the upright guide rod, so as to achieve up and down movement without interference.

[0011] Furthermore, the fixed bottom is provided with a cylinder connecting seat that connects to the cylinder body; its side wall is provided with a number of wedge blocks that fit into the wedge-shaped notches on the cylinder body to realize torque transmission during drilling; the bottom outer side is provided with a fixed bottom stop block that limits the rotation of the rotating bottom; and its upper surface is provided with an unlocking limit for locking the hook.

[0012] Furthermore, a pin is provided on the rotating base, which is connected to the fixed base. The end of the pin is fixed by a nut. Drill teeth are arranged on the bottom of the rotating base to cut the soil during drilling operations.

[0013] Furthermore, the guide bar and the key bar of the upright rod fit together to transmit torque during the drilling process.

[0014] The beneficial effects achieved by this utility model are as follows: the retractable bucket bottom design increases the unloading space, reduces unloading resistance, and improves unloading efficiency; key strips are arranged inside the uprights and guide rods to realize torque force transmission and avoid damage caused by excessive force on the bucket bottom; the uprights and guide rods adopt a modular assembly method, which facilitates replacement and maintenance. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the internal structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the external structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the unlocking device of this utility model;

[0019] Figure 4 This is a schematic diagram showing the positions of the upright guide bar and the upright key bar of this utility model;

[0020] Figure 5 This is a schematic diagram of the rotating state of the rotating base of this utility model;

[0021] Figure 6 This is a schematic diagram of the overall structure of this utility model.

[0022] In the diagram: 100, drill rod; 200, telescopic bucket bottom drill bit; 1, connecting side; 1-1, connecting side guide ring; 1-2, top plate; 2, unlocking device; 2-1, spring guide rod; 2-2, upper limit ring; 2-3, return spring; 2-4, lower limit ring; 2-5, hook; 3, upright guide rod; 3-1, upright guide rod key; 3-2, limit block; 4, cylinder; 4-1, cylinder guide ring; 5, upright; 5-1, upright key; 5-2, retaining ring; 6, fixed bottom; 6-1, cylinder connecting seat; 6-2, fixed bottom stop block; 7, rotating bottom; 8, drill teeth; 9, unlocking limit; 10, wedge block. Detailed Implementation

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0024] Example 1

[0025] like Figure 1-6 As shown, a telescopic bucket bottom rotary drilling tool includes a telescopic bucket bottom drill 200. The telescopic bucket bottom drill 200 includes a connecting unit 1, a cylinder 4 is fixedly connected to the lower part of the connecting unit 1, a vertical rod guide rod 3 is connected inside the cavity of the cylinder 4, and an unlocking device 2 is provided on its inner wall. A vertical rod 5 is embedded in the vertical rod guide rod 3, and a fixed bottom 6 is connected to the bottom of the vertical rod 5. The fixed bottom 6 is rotatably connected to a rotating bottom 7 below it, and drill teeth 8 are provided on the rotating bottom 7.

[0026] The connecting element 1 includes a connecting element guide ring 1-1 welded to its side wall and a top plate 1-2 welded to its end face. The top plate 1-2 is welded to the cylinder 4, and stiffening plates are arranged on it for reinforcement.

[0027] The unlocking device 2 includes a spring guide rod 2-1, with an upper limit ring 2-2 and a lower limit ring 2-4 respectively at both ends of the spring guide rod 2-1, a reset spring 2-3 sleeved in the middle, and a hook 2-5 at the bottom.

[0028] The pole guide rod 3 includes at least two pole guide rod key strips 3-1 evenly distributed along the circumference at its lower end, and three limiting blocks 3-2 are installed at its bottom. The limiting blocks 3-2 are connected to the pole guide rod 3 by fasteners.

[0029] The inner wall of the cylinder 4 is provided with a cylinder guide ring 4-1, which, together with the connecting square guide ring 1-1, serves as a guide to ensure that the upright guide rod 3 moves up and down smoothly without jamming. A wedge-shaped notch is provided on the outer wall of the cylinder 4.

[0030] The upright 5 has at least two upright key strips 5-1 evenly distributed along the circumference, and three retaining rings 5-2 are evenly welded to the top circumference. The retaining rings 5-2 are used to ensure that the upright 5 and the upright guide rod 3 can be smoothly assembled and move up and down without interference.

[0031] The fixed bottom 6 is provided with a cylinder connecting seat 6-1 connected to the cylinder 4; its side wall is provided with a number of wedge blocks 10 that fit into the wedge notches on the cylinder 4 to realize torque transmission during drilling; the bottom outer side is provided with a fixed bottom stop 6-2 that limits the rotation of the rotating bottom 7; its upper surface is provided with an unlocking limit 9 that locks the hook 2-5.

[0032] A pin is provided on the rotating base 7, which is connected to the fixed base 6. The end of the pin is fixed by a nut. Drill teeth 8 are arranged at the bottom of the rotating base 7 to cut the soil during drilling operations.

[0033] The guide bar 3-1 and the key bar 5-1 of the upright rod fit together to transmit torque during the drilling process.

[0034] The upright guide rod 3 is connected to the top plate 1-2 by welding or flange, and is coaxial with the center of the cylinder 4.

[0035] The two ends of the unlocking device 2 are respectively connected to the connecting side 1, the top plate 1-2 and the fixed base 6. The upright 5 is connected to the rotating base 7 by welding or flange, and is ensured to be coaxial with the center of the cylinder 4.

[0036] The telescopic bucket bottom rotary drilling tool 200 is a soil extraction device for rotary drilling rigs, used to meet the drilling operations of engineering construction. The telescopic bucket bottom rotary drilling tool 200 is connected to the drill rod 100 through the connecting side 1. The connecting side 1 and the drill rod 100 are connected by a pin shaft. Depending on the size of the machine, one or two sets of holes are set on the connecting side to adapt to the connecting pin shaft.

[0037] Working Principle: The drill rod 100 of the rotary drilling rig is connected to the telescopic bucket bottom drill bit 200 via the connecting block 1. The main unit drives the drill rod 100 to rotate forward, which in turn drives the drill bit to rotate forward. The rotating bottom 7 rotates around the fixed bottom 6 under the driving force. The rotating bottom 7 and the fixed bottom 6 form an inlet. The drill teeth 8 arranged on the rotating bottom 7 cut the soil, and the resulting excavated soil enters the cylinder 4 through the inlet. The torque generated during drilling is transmitted to the cylinder 4 through the wedge blocks 10 arranged on the fixed bottom 6. At the same time, the upright 5 is fixedly connected to the fixed bottom 6, and the upright key 5-1 arranged on it cooperates with the upright guide key 3-1 on the upright guide rod 3. Part of the torque is transmitted to the top plate 1-2 connected to the connecting block and the cylinder 4, and then to the cylinder 4. After drilling for a certain period of time, when the excavated soil in the cylinder 4 reaches a certain amount, generally accounting for a certain percentage of the volume of the cylinder 4, the drilling process is completed. At approximately 80%, the rotary drilling rig lifts the drill rod 100, thereby pulling the retractable bucket bottom drill bit 200 out of the hole. At this time, the power head pressure plate of the rotary drilling rig presses down with the unlocking device 2, causing the fixed bottom 6 and the connected upright 5 and rotating bottom 7 to fall by their own weight and the weight of the excavated soil due to the disengagement of the unlocking device 2, thus unloading the excavated soil inside the cylinder 4. The bottom of the upright guide rod 3 is equipped with a limiting block 3-2, and the retaining ring 5-2 at the top of the upright 5 contacts the limiting block 3-2 to prevent the unlocking device 2 from disengaging from the retractable bucket bottom drill bit 200. At this time, as the rotary drilling rig main unit falls, the unlocking device 2 retracts under the action of gravity, and the upright 5 retracts coaxially with the cylinder 4 under the guidance of the upright guide rod 3. When the unlocking limit 9 contacts the hook 2-5, the fixed bottom 6 is reliably locked, and the retractable bucket bottom drill bit 200 enters the next drilling cycle.

[0038] It should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The terminology used in the description of this application is only for describing specific embodiments and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings indicate similar items, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0040] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

Claims

1. A retractable bucket-bottom rotary drilling tool, characterized in that, The invention includes a retractable bucket-bottom drilling tool, comprising a connecting unit, a cylinder fixedly connected to the lower part of the connecting unit, a vertical guide rod connected inside the cavity of the cylinder, an unlocking device provided on the inner wall of the cylinder, a vertical rod embedded in the vertical guide rod, a fixed bottom connected to the bottom of the vertical rod, the fixed bottom being rotatably connected to a rotating bottom below it, the rotating bottom rotating around the fixed bottom under the driving force of the drill rod to form an inlet, and drill teeth provided at the bottom of the rotating bottom. The retractable bucket-bottom rotary drilling tool is connected to the drill rod via a pin through the connecting unit.

2. The telescopic bucket-bottom rotary drilling tool according to claim 1, characterized in that, The connecting element includes a connecting guide ring welded to its side wall and a top plate welded to the end face. The top plate is welded to the cylinder, and stiffening ribs are arranged on it for reinforcement.

3. The telescopic bucket-bottom rotary drilling tool according to claim 1, characterized in that, The unlocking device includes a spring guide rod, with an upper limit ring and a lower limit ring at both ends of the spring guide rod, a return spring sleeved in the middle, and a hook for locking the cylinder at the bottom.

4. The telescopic bucket-bottom rotary drilling tool according to claim 1, characterized in that, The pole guide includes at least two pole guide key strips evenly distributed along the circumference at its lower end, and three limiting blocks are installed at its bottom. The limiting blocks are connected to the pole guide by fasteners.

5. The telescopic bucket-bottom rotary drilling tool according to claim 4, characterized in that, The inner wall of the cylinder is provided with a cylinder guide ring, which, together with the connecting square guide ring, plays a guiding role to ensure that the upright guide rod moves up and down smoothly without jamming. A wedge-shaped notch is opened on the outer wall of the cylinder.

6. The telescopic bucket-bottom rotary drilling tool according to claim 4, characterized in that, The upright has at least two key strips evenly distributed along its circumference, and three retaining rings are evenly welded to its top circumference. The retaining rings are used to ensure that the upright and the guide rod are smoothly assembled and can move up and down without interference.

7. The telescopic bucket-bottom rotary drilling tool according to claim 3, characterized in that, A pin is provided on the rotating base, which is connected to the fixed base. The end of the pin is fixed by a nut. Drill teeth are arranged on the bottom of the rotating base to cut the soil during drilling operations.

8. The telescopic bucket-bottom rotary drilling tool according to claim 7, characterized in that, The fixed bottom is provided with a cylinder connecting seat that is connected to the cylinder body. Its side wall is provided with several wedge blocks that fit into the wedge-shaped notches on the cylinder body to realize torque transmission during drilling. Its bottom outer side is provided with a fixed bottom stop block that limits the rotation of the rotating bottom. Its upper surface is provided with an unlocking limit for locking the hook.

9. The telescopic bucket-bottom rotary drilling tool according to claim 6, characterized in that, The guide bar and the key bar of the upright rod fit together to transmit torque during the drilling process.

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