Drill bit for dealing with waste pipelines during hole formation

Abstract

The present invention discloses a drill bit for processing waste pipelines during hole formation, which includes a joint located at the top for connecting with a drill pipe and a core pipe fixed below the joint; the drill bit further includes a drill barrel, the top plate of which is welded to the lower end of the core pipe; a circle of triangular sawteeth for cutting waste pipelines is welded to the bottom ring surface of the side wall of the drill barrel; a plurality of inner liners are arranged inside the drill barrel, and each inner liner is composed of a horizontally arranged sector plate and a longitudinally arranged arc plate, the outer arc edge of the sector plate is welded to the upper arc edge of the corresponding arc plate; the sector plate is detachably connected to the top plate of the drill barrel, the arc plate is attached to the inner surface of the side wall of the drill barrel, and a plurality of hook ribs for winding and hooking metal cables of waste pipelines are welded to the inner surface of the arc plate. This drill bit can quickly and efficiently damage the waste pipelines in the soil layer and carry them out of the hole opening, and can quickly and conveniently clean up the slag and debris clamped and hooked inside the drill barrel lifted out of the hole opening.

Description

Technical Field

[0001] The present invention relates to the technical field of pile foundation hole forming construction, and specifically relates to a drill bit for processing waste pipelines during pile foundation hole forming. Background Art

[0002] The cast-in-place pile is a very mature pile foundation technology. Its construction steps are as follows: the drill bit drills into the hole while simultaneously carrying out mud wall protection. After drilling to the bottom elevation of the hole, the hole is cleared, and then the steel reinforcement cage is lowered and the concrete is poured.

[0003] In the prior art, a conventional scraping drill bit is generally used to drill into the hole in the soil layer. The drill bit includes a joint at the top for connecting with the drill pipe, a core pipe below the joint, a drill tip at the bottom end of the core pipe, and multiple inclined scrapers. Each scraper is inclined with the inner part lower and the outer part higher, and the inner end of each scraper is fixed to the core pipe. The outer ends of all the scrapers are welded to the same retaining ring, and multiple horizontal connecting beams for reinforcement are also provided between the retaining ring and the core pipe.

[0004] The drill bit of the above prior art has excellent drilling efficiency in conventional soil layers. However, the soil conditions in actual construction are often relatively complex, and waste pipelines buried in the soil are often encountered, resulting in a significant reduction in the drilling efficiency of the above conventional drill bit. This is because the inner core of the pipeline is made of metal wires such as copper wires and aluminum wires, and the outer layer is wrapped with plastic pipes such as PVC pipes and PV pipes. The plastic pipes are elastic, tough, and have a certain strength, so the scrapers of the drill bit are prone to slipping or jumping; moreover, even if the drill bit finally destroys the plastic pipe, the firm and tough metal wires inside will wind around and cover the scrapers and picks of the drill bit, making the drill bit lose the ability to drill downward. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a drill bit for processing waste pipelines during hole forming, which can quickly and efficiently destroy the waste pipelines in the soil layer and carry them out of the hole opening, and can quickly and conveniently clean up the slag and fragments that are stuck and hooked inside the drill barrel lifted out of the hole opening.

[0006] The technical solution of the present invention is to provide a drill bit for processing waste pipelines during hole forming, which includes a joint at the top for connecting with the drill pipe and a core pipe fixed below the joint; the drill bit further includes a drill barrel, and the top plate of the drill barrel is welded to the lower end of the core pipe; a circle of triangular sawteeth for cutting waste pipelines is welded to the bottom ring surface of the side wall of the drill barrel; multiple inner liners are provided inside the drill barrel, and each inner liner is composed of a horizontal sector plate and a longitudinal arc plate. The outer arc edge of the sector plate is welded to the upper arc edge of the corresponding arc plate; the sector plate is detachably connected to the top plate of the drill barrel, the arc plate is attached to the inner surface of the side wall of the drill barrel, and multiple hook ribs for winding and hooking waste pipelines are welded to the inner surface of the arc plate.

[0007] Compared with the prior art, the drill bit for processing waste pipelines when drilling with the above structure has the following advantages.

[0008] When a worker drills normally with a conventional drill bit, if he encounters a slow drilling of the waste pipeline, he will lift the drill rod, replace the drill bit of the present application, and drill again; since the drill bit of the present application is an integral drill barrel and the bottom surface is surrounded by a circle of large and hard triangular serrations, it has a more powerful cutting and destruction efficiency, no slipping and no cutting jump, and can quickly cut the external plastic pipe and continue to go deeper to cut the internal metal cable; the cut plastic pipe section and metal cable section will be stuck in the drill barrel along with the soil, and the multiple hooks arranged in the drill barrel can quickly and firmly hook and wrap around as many metal cables as possible, so when the drill bit of the present application drills a certain distance beyond the height of the waste pipeline, the drill rod can be lifted up, most of the debris and metal cables cut from the waste pipeline can be carried out of the hole; then the conventional drill bit can be replaced and the drilling can be continued; and since the main body of the plastic pipe and metal cable in the hole is carried away and the retention amount is small, it can ensure that the subsequent conventional drill bit can drill more smoothly.

[0009] Of course, since the hook reinforcement in the drill barrel is tightly wrapped around the metal cable hook, making it difficult to disengage, the debris of the pipeline is quickly and in large quantities carried out of the hole by the drill barrel; but the tight hook is also a double-edged sword. After the drill bit is lifted out of the hole, it is difficult for the workers on the ground to clean up the debris that is hooked, entangled and stuck inside the drill barrel; but the present application fixes the hook reinforcement on the split-type detachable inner sleeve. The workers on the ground only need to disassemble each inner sleeve from the drill barrel top plate, and the each inner sleeve and the debris metal cable in the drill barrel will easily fall out of the drill barrel automatically under the action of their own weight, and automatically disintegrate and spread into six inner sleeves and a number of fragmented debris, metal cables, etc.; compared with the process of workers using shovels, hooks and other tools to dig and pull out of the drill barrel to clean up debris, the subsequent cleaning of the drill bit in the present application is convenient, saving time and effort.

[0010] In summary, the drill bit has a good effect on cutting and destroying the plastic outer tubes of waste pipelines, and has a good effect on cutting the metal cables inside the pipelines. It can quickly and firmly wrap around the metal cables and clamp other debris to carry as much of it as possible out of the hole. Finally, it can quickly and conveniently clean up the debris that is clamped and hooked inside the drill barrel.

[0011] As an improvement, a plurality of wedge-shaped ribs with higher inner sides and lower outer sides are evenly welded to the outer wall of the core tube along the circumference, and the bottom edge of each wedge-shaped rib is welded to the top plate of the drill barrel; a circle of upper convex ring is welded to the outer edge of the top plate of the drill barrel, and the outer edge of each wedge-shaped rib is welded to the inner side surface of the upper convex ring; in this way, the inner, lower and outer sides of the wedge-shaped rib are welded to the core tube, the top plate of the drill barrel and the additional upper convex ring, which significantly increases the welding area with the core tube and the drill barrel, strengthens the connection between the drill barrel and the core tube, improves the integrity of the drill bit, and enhances the firmness of the connection node position; ensuring smooth and stable torque transmission.

[0012] The specific structure of the detachable connection between each sector plate and the top plate of the drill barrel is preferably that convex ear plates are provided on both straight sides of each sector plate, and long through holes corresponding to all the ear plates are provided on the top plate of the drill barrel; the ear plates of each sector plate pass upward through the corresponding long through holes; each wedge-shaped rib plate is located between two adjacent sector plates, and the wedge-shaped rib plate is screwed to the ear plate on the right side of the left sector plate and the ear plate on the left side of the right sector plate; at least one circle of multiple ear plates protrudes upward from the upper edge of the clamped wedge-shaped rib plate.

[0013] The advantages of the above preferred connection structure are as follows. First, it ensures that the process of installing the inner lining sleeve on the drill barrel is convenient and fast. Only need to pass the ear plate through the corresponding long through hole on the top plate of the drill barrel and screw the adjacent ear plates to the central wedge-shaped rib plate; moreover, the inner lining sleeve is fixed to the drill barrel through the wedge-shaped rib plate, and the wedge-shaped rib plate itself is a very firm and stable component on the drill bit due to its large enough welding area, so the positioning of each inner lining sleeve assembled with the wedge-shaped rib plate is firm and reliable, so as to ensure that each inner lining sleeve can firmly hook and carry away more metal cables and muck; more importantly, the connection structure of the above ear plate and the wedge-shaped rib plate is completely exposed on the upper surface of the top plate of the drill barrel, so the disassembly process is also very convenient. There is no need to go from the lower opening of the drill barrel upwards, just loosen each bolt from above the top plate of the drill barrel; and the upper surface of the top plate where the connection part is located does not contact the soil, with little wear and not easy to be damaged; furthermore, in case the inner lining sleeves, metal cables and debris are still stuck in the drill barrel after the bolts are loosened, just knock on the part of the ear plate that protrudes above the wedge-shaped rib plate, and it can easily vibrate and loosen each inner lining sleeve and the attached debris, making it fall smoothly. In summary, the preferred structure is convenient in the assembly process, firm in the assembly effect, reasonable in the assembly position, with little wear, easy to disassemble. Even if it is stuck, knocking on the protruding ear plate can shake off the clamped objects, and the slag discharge and cleaning are smooth.

[0014] As a further preference, vertical reinforcing ribs are arranged at intervals on the inner surface of the side wall of the drill barrel, and rounded corners for transition are provided on both sides of the bottom end of each reinforcing rib; the arc-shaped plate of each inner lining sleeve is stuck between two adjacent reinforcing ribs; the reinforcing ribs have three functions. One is to strengthen the strength of the side wall of the drill barrel and prevent it from bending and deforming; the second is to provide guidance for the installation of each inner lining sleeve. By sliding the arc-shaped plate of the inner lining sleeve along two adjacent reinforcing ribs, the ear plate at the top of the inner lining sleeve can be accurately inserted into the corresponding long through hole on the top plate of the drill barrel; the third is that after the inner lining sleeve is fixed to the top plate of the drill barrel, its arc-shaped plate is clamped by the two side reinforcing ribs to avoid shaking, enhancing the stability of the installation and fixation of the inner lining sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the drill bit for treating waste pipelines during hole formation of the present invention.

[0016] Figure 2 isFigure 1 Schematic diagram of the structure after deflecting by a certain angle.

[0017] Figure 3 It is a schematic diagram of the explosion structure of the drill bit for dealing with waste pipelines during the hole formation of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the drill barrel of the drill bit for dealing with waste pipelines during the hole formation of the present invention as viewed from the bottom.

[0019] In the figure, 1 is the joint, 2 is the core pipe, 3 is the drill barrel, 4 is the wedge-shaped rib plate, 5 is the upper convex ring, 6 is the triangular sawtooth, 7 is the hook rib, 8 is the inner lining sleeve, 8.1 is the sector plate, 8.2 is the arc plate, 9 is the ear plate, 10 is the long through hole, and 11 is the reinforcing rib. Specific embodiments

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] As Figures 1 to 4 shown, the drill bit for dealing with waste pipelines during the hole formation of the present invention includes a joint 1 located at the top for connecting with the drill pipe, a core pipe 2 fixed below the joint 1, and a drill barrel 3 located below the core pipe 2.

[0022] The top plate of the drill barrel 3 is welded to the lower end of the core pipe 2. Along the circumferential direction of the outer wall of the core pipe 2, multiple, such as six, wedge-shaped rib plates 4 with a higher inner side and a lower outer side are evenly welded, and the bottom edge of each wedge-shaped rib plate 4 is welded to the top plate of the drill barrel 3. A circle of upper convex rings 5 is welded to the outer edge of the top plate of the drill barrel 3, and the outer side of each wedge-shaped rib plate 4 is welded to the inner side surface of the upper convex ring 5. Of course, the inner side of each wedge-shaped rib plate 4 is welded to the outer wall of the core pipe 2.

[0023] A circle of multiple triangular sawteeth 6 for cutting waste pipelines is welded to the bottom ring surface of the side wall of the drill barrel 3.

[0024] The drill bit further includes multiple, such as six, inner lining sleeves ⑧, each inner lining sleeve ⑧ is composed of a horizontally arranged sector plate 8.1 and a longitudinally arranged arc plate 8.2. The outer arc edge of each sector plate 8.1 is welded to the upper arc edge of the arc plate 8.2 of the same inner lining sleeve ⑧; the sector plate 8.1 is detachably connected to the top plate of the drill barrel 3, the arc plate 8.2 is attached to the inner surface of the side wall of the drill barrel 3, and multiple hook ribs 7 for winding and hooking metal cables of waste pipelines are welded to the inner surface of the arc plate 8.2.

[0025] The specific connection structure between the sector plate 8.1 and the top plate of the drill barrel 3 is preferably as follows. Two upwardly convex ear plates 9 are provided on the left straight edge of each sector plate 8.1, and two upwardly convex ear plates 9 are also provided on the right straight edge of each sector plate 8.1; long through holes 10 corresponding to all the ear plates 9 of the six sector plates 8.1 are provided on the top plate of the drill barrel 3; the four ear plates 9 of each sector plate 8.1 pass upward through the corresponding long through holes 10 on the top plate of the drill barrel 3; each wedge-shaped rib plate 4 is located between two adjacent sector plates 8.1, and the wedge-shaped rib plate 4 is screwed to the ear plate 9 on the right side of the left sector plate 8.1 and the ear plate 9 on the left side of the right sector plate 8.1. At least one circle of multiple ear plates 9 protrudes upward from the upper edge of the clamped wedge-shaped rib plate 4. More precisely, when viewed from the top-down direction of the drill barrel 3, there are two inner and outer circles of ear plates 9, and all the ear plates 9 in the outer circle protrude upward from the upper edge of the clamped wedge-shaped rib plate 4.

[0026] Vertically arranged reinforcing ribs 11 are spaced on the inner surface of the side wall of the drill barrel 3, and rounded corners for transition are provided on both sides of the bottom end of each reinforcing rib 11; the arc-shaped plate 8.2 of each inner lining sleeve 8 is clamped between two adjacent reinforcing ribs 11.

Claims

1. A drill bit for processing waste pipelines during hole formation, which comprises a joint located at the top for connecting with a drill pipe and a core pipe fixed below the joint; characterized in that: The drill bit further includes a drill barrel, the top plate of which is welded to the lower end of the core pipe; a circumferential bottom ring surface of the side wall of the drill barrel is welded with a circle of triangular saw teeth for cutting waste pipelines; a plurality of inner liners are arranged in the drill barrel, and each inner liner is composed of a horizontally arranged sector plate and a longitudinally arranged arc plate, and the outer arc edge of the sector plate is welded to the upper arc edge of the corresponding arc plate; the sector plate is detachably connected to the top plate of the drill barrel, the arc plate is attached to the inner surface of the side wall of the drill barrel, and a plurality of hook ribs for winding and hooking metal cables of waste pipelines are welded to the inner surface of the arc plate; A plurality of wedge-shaped rib plates with higher inner and lower outer sides are evenly welded to the outer wall of the core pipe along the circumferential direction, and the bottom edge of each wedge-shaped rib plate is welded to the top plate of the drill barrel; a circumferential upward convex ring is welded to the outer edge of the top plate of the drill barrel, and the outer side of each wedge-shaped rib plate is welded to the inner side surface of the upward convex ring; Upper convex ear plates are provided on both straight edges of each sector plate, and long through holes corresponding to all the ear plates one by one are provided on the top plate of the drill barrel; the ear plates of each sector plate pass upward through the corresponding long through holes; each wedge-shaped rib plate is located between two adjacent sector plates, and the wedge-shaped rib plate is screwed to the ear plate on the right side of the left sector plate and the ear plate on the left side of the right sector plate; at least one circle of the upper parts of a plurality of ear plates protrude above the upper edge of the clamped wedge-shaped rib plate.

2. The drill bit for processing waste pipelines during hole formation according to claim 1, characterized in that: Vertical reinforcing ribs are arranged at intervals on the inner surface of the side wall of the drill barrel, and rounded corners for transition are provided on both sides of the bottom end of each reinforcing rib; the arc plate of each inner liner is clamped between two adjacent reinforcing ribs.

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