Side tooth drill bit

Abstract

The utility model discloses a side tooth drill bit, which relates to the technical field of construction drilling equipment, can be arranged in a pile casing in a penetrating manner, and comprises a connecting cylinder, one end of the connecting cylinder is used for being externally connected with a drill rod, and the other end of the connecting cylinder is provided with a slag outlet; the protective ring is annularly arranged outside the connecting cylinder, and the protective ring is fixedly connected with the connecting cylinder; one end of the cutting edge is fixedly connected with the inner side of the protective ring, and the other end of the cutting edge obliquely extends downwards to the side wall, close to the slag outlet, of the connecting cylinder; and the retainer cutting edge is fixedly connected to the outer side of the retainer. According to the side tooth drill bit, the drill bit can smoothly pass through a deformation area of a pile casing, the diameter of a follow-up drill hole meets the requirement, cost is low, and safety is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to construction drilling equipment technical field, in particular to a side tooth drill bit. BACKGROUND

[0002] The casing is a tool for drilling bored pile construction operation, and the main functions of the casing during piling include supporting the hole wall, guiding the pile hammer and isolating groundwater. As a temporary supporting structure, the casing plays an indispensable role in pile foundation construction.

[0003] In the casing construction, the drill bit diameter is generally smaller than the casing diameter by about 20-40 cm. Under normal circumstances, the drill bit can easily pass through the casing and then continue to drill downward. However, due to changes in geology, it may cause slight deformation and edge curling of the casing, which in turn causes the drill bit to be unable to pass through the deformed area of the casing. If a drill bit with a smaller diameter is replaced, it can successfully pass through the deformed area of the casing, but the subsequent drilling diameter does not meet the preset diameter requirement. In order to solve this problem, in the prior art, a diver underwater cuts off the deformed area of the casing, so that the drill bit can pass through the deformed area smoothly. However, this method is high in cost and high in risk.

[0004] There is an urgent need to design a low-cost and high-safety solution that allows the drill bit to pass through the deformed area of the casing smoothly and the subsequent drilling diameter to meet the requirements. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a side tooth drill bit to solve the problems existing in the prior art, so that the drill bit can pass through the deformed area of the casing smoothly, the subsequent drilling diameter meets the requirements, and the cost is low and the safety is high.

[0006] To achieve the above-mentioned purpose, the utility model provides the following scheme:

[0007] The utility model provides a side tooth drill bit which can be arranged in the casing and comprises:

[0008] The connecting cylinder has one end connected with the drill rod and the other end provided with a slag outlet;

[0009] The guard ring is arranged around the outside of the connecting cylinder, and the guard ring is fixedly connected with the connecting cylinder;

[0010] The cutting edge has one end fixedly connected with the inside of the guard ring and the other end inclinedly extended downward to the side wall of the connecting cylinder near the slag outlet;

[0011] The guard ring cutting edge is fixedly connected to the outside of the guard ring.

[0012] Preferably, the diameter of the guard ring is smaller than the inner diameter of the casing by 50-80 cm.

[0013] Preferably, the length of the guard ring cutting edge is 15-20 cm.

[0014] Preferably, the both sides of the slag outlet are symmetrically provided with portal plates, and the end of the portal plate is in an inclined structure.

[0015] Preferably, a plurality of supporting rods are fixedly connected between the connecting cylinder and the guard ring.

[0016] Preferably, a plurality of the cutting edges are fixedly arranged on the inner side of the guard ring, and the cutting edges are staggered with the supporting rods.

[0017] Preferably, the cutting edge comprises a vertical cutting plate fixedly connected between the connecting cylinder and the guard ring, and a plurality of cutting teeth are uniformly arranged on the bottom edge of the vertical cutting plate.

[0018] Preferably, the guard ring cutting edge comprises a guard ring connecting block with a right-angled triangle cross section, one right angle of the guard ring connecting block is fixedly connected with the outer side wall of the guard ring, and a plurality of cutting teeth are uniformly arranged on the other right angle.

[0019] Preferably, the number of the guard ring cutting edges is the same as the number of the cutting edges, and the guard ring cutting edges are located on the outer side of the connecting position between the guard ring and the cutting edge.

[0020] Preferably, a female buckle is fixedly arranged on the end of the connecting cylinder away from the slag outlet, and the female buckle can be fixedly connected with the male screw thread on the end of the drill rod.

[0021] The utility model discloses the following technical effects are obtained relative to the prior art:

[0022] The utility model discloses the diameter of the guard ring is reduced by 30-40 cm than the existing conventional drill bit, so that the drill bit can smoothly pass through the area of the slight deformation or edge curling of the guard cylinder, and the guard ring cutting edge is arranged on the outer side of the guard ring, the guard ring cutting edge can compensate the size reduced by the utility model compared with the conventional drill bit, because the guard ring cutting edge is relatively small as a whole, when the drill bit passes through the deformation area of the guard cylinder, it can pass through the non-deformation part of the deformation area of the guard cylinder, and when the drill bit rotates to drill a hole, the aperture requirement can also be met. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without paying creative labor for the person skilled in the art.

[0024] Figure 1 It is a top view schematic diagram of the edge tooth drill bit in one or some embodiments of the utility model.

[0025] Figure 2 This is a bottom view schematic diagram of a toothed drill bit in one or more embodiments of the present invention;

[0026] Figure 3 This is a partial cross-sectional schematic diagram of the edge tooth drill bit in one or more embodiments of this utility model.

[0027] In the diagram: 1-connecting cylinder, 2-protective ring, 3-support rod, 4-nut, 5-cutting blade, 501-vertical cutting plate, 6-protective ring cutting blade, 601-protective ring connecting block, 7-gantry plate, 8-cutting teeth, 9-slag outlet. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The purpose of this utility model is to provide a toothed drill bit to solve the problems existing in the prior art, so that the drill bit can pass smoothly through the deformation area of ​​the casing, the subsequent drilling diameter meets the requirements, and the cost is low and the safety is high.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] In actual use, the casing may sometimes deform under pressure at a certain position along its axial direction. Since the casing is a rigid structure, the deformation location and area are not very large. A side or point within this deformation area may become concave or curled. Although the deformation is only at a single location and the deformation size is generally small, a matching drill bit with a circular cross-section cannot pass through this deformation area from top to bottom. To solve this problem, this invention provides a toothed drill bit that can be inserted into the casing, such as... Figure 1 , Figure 2 , Figure 3As shown, including connecting cylinder 1 and retainer 2, connecting cylinder 1 one end for external drill pipe, the other end is provided with slag outlet 9; retainer 2 ring is arranged on the outside of connecting cylinder 1, connecting cylinder 1 and retainer 2 are fixedly connected by a plurality of support rods 3, the diameter of retainer 2 is reduced by 30-40cm than the diameter of the conventional existing drill bit, so that when the deformation occurs at a certain position of the protection cylinder, the reduced size of the retainer 2 can smoothly pass through the deformation area; the cutting edge 5 is fixedly connected with the inner side of the retainer 2, and the other end extends obliquely downward to the side wall of the connecting cylinder 1 near the slag outlet 9; when the connecting cylinder 1 is rotated by the drill pipe, the cutting edge 5 can drill quickly, and the slag during drilling enters the connecting cylinder 1 through the slag outlet 9 at the end of the connecting cylinder 1, and then is discharged; since the diameter of the retainer 2 of the utility model is smaller than that of the conventional drill bit, the required borehole diameter size is not met, in order to ensure that the borehole diameter size meets the requirements, the utility model is provided with a retainer cutting edge 6 fixedly arranged on the outer side wall of the retainer 2, the retainer cutting edge 6 is small in size, when the edge-tooth drill bit passes through the deformation area, the edge-tooth drill bit can be appropriately rotated, so that the retainer cutting edge 6 passes through the un-deformed position of the deformation area, and the part of the retainer 2 without the retainer cutting edge 6 passes through the deformed position of the deformation area. During drilling, the retainer cutting edge 6 compensates for the reduced size of the retainer 2, so that the borehole diameter meets the requirements.

[0032] The diameter of the drill bit in the prior art is 20-40cm smaller than the inner diameter of the protection cylinder, the diameter of the retainer 2 of the utility model is 30-40cm smaller than the diameter of the original drill bit, so the diameter of the retainer 2 of the utility model is 50-80cm smaller than the inner diameter of the protection cylinder. Since the utility model is provided with three retainer cutting edges 6 arranged on the outer wall of the retainer 2, the length of the single retainer cutting edge 6 in the embodiment is 15-20cm, and the overall size of the two retainer cutting edges 6 located on the two symmetrical sides of the retainer 2 plus the diameter of the retainer is exactly the same as the diameter of the existing drill bit, which ensures that the borehole diameter meets the requirements when the drill bit drills.

[0033] In order to make the slag in the drilling process enter the slag outlet smoothly, the embodiment is provided with portal plates 7 symmetrically arranged on both sides of the slag outlet, the portal plates 7 extend outward along the axial direction at the end, and the end of the portal plate 7 is an inclined structure, so that the two portal plates 7 form a door-shaped structure, and the slag outlet 9 is located at the inner bottom of the door-shaped structure, and the slag can enter the slag outlet 9 through the side opening of the door-shaped structure.

[0034] The cutting edge 5 of the embodiment is staggered with the support rod 3. The cutting edge 5 comprises a vertical cutting plate 501 fixedly connected between the connecting cylinder 1 and the retainer 2, the vertical cutting plate 201 is uniformly provided with a plurality of cutting teeth 8 on the bottom edge, and the vertical cutting plate 201 is arranged obliquely, the higher end is fixedly connected with the inner side of the retainer 2, and the lower end is fixedly connected with the side wall of the connecting cylinder 1 located at the lower part of the retainer 2. The retainer cutting edge 6 comprises a retainer connecting block 601 with a right-angled triangle cross section, one right angle of the retainer connecting block 601 is fixedly connected with the outer side wall of the retainer 2, and the other right angle is uniformly provided with a plurality of cutting teeth 8.

[0035] In order to make the utility model can be fixedly connected with the drill rod, the female buckle 4 is fixedly arranged at the end of the connecting cylinder 1 away from the slag outlet 9, and the female buckle 4 can be fixedly connected with the male buckle thread at the end of the drill rod. In use, the structure is used to construct the deformation position of the protection cylinder, then a drill bit with smaller size is used to pass through the two-meter position below the deformation area of the protection cylinder, then the edge tooth drill bit of the utility model is replaced, the appropriate position is found by appropriately adjusting rotation, the edge tooth drill bit is started, and continuous rotation is carried out, so that the position below the deformation area of the protection cylinder is normally constructed, manual underwater cutting is not needed in the deformation area, the safety of the drilling pile construction operation is improved, and the cost is reduced.

[0036] The principle and implementation mode of the utility model are described by applying specific examples in the utility model, and the above embodiment is only used for helping to understand the method and core idea of the utility model; meanwhile, according to the idea of the utility model, the specific implementation mode and application range will be changed by the general technical personnel in the field. In conclusion, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A toothed drill bit, capable of being inserted into a casing, characterized in that: The utility model relates to a cutting device for drill rod, which comprises: a connecting cylinder, one end of which is used for connecting drill rod, and the other end of which is provided with a slag outlet; a guard ring, which is annularly arranged outside the connecting cylinder, and is fixedly connected with the connecting cylinder; cutting blades, one end of which is fixedly connected with the inner side of the guard ring, and the other end of which is obliquely extended downward to the side wall of the connecting cylinder near the slag outlet; guard ring cutting blades, which are fixedly connected with the outer side of the guard ring.

2. The side tooth drill bit of claim 1, wherein: The diameter of the guard ring is 50-80 cm smaller than the inner diameter of the connecting cylinder.

3. The side tooth drill bit of claim 2, wherein: The length of the guard ring cutting blades is 15-20 cm.

4. The side tooth drill bit of claim 1, wherein: Symmetrical portal plates are arranged on both sides of the slag outlet, and the terminal end of the portal plate is in an inclined structure.

5. The side-cutter drill bit of claim 1, wherein: A plurality of supporting rods are used to fixedly connect the connecting cylinder and the guard ring.

6. The side toothed drill bit of claim 5, wherein: A plurality of cutting blades are fixedly arranged on the inner side of the guard ring, and the cutting blades are staggered with the supporting rods.

7. The side teeth drill bit of claim 1, wherein: The cutting blades comprise vertical cutting plates fixedly connected between the connecting cylinder and the guard ring, and a plurality of cutting teeth are uniformly arranged on the bottom edge of the vertical cutting plates.

8. The side teeth drill bit of claim 1, wherein: The guard ring cutting blades comprise guard ring connecting blocks with a right-angled triangle cross section, one right-angled side of the guard ring connecting blocks is fixedly connected with the outer side wall of the guard ring, and a plurality of cutting teeth are uniformly arranged on the other right-angled side.

9. The side toothed drill bit of claim 6, wherein: The number of the guard ring cutting blades is the same as that of the cutting blades, and the guard ring cutting blades are located outside the connecting position of the guard ring and the cutting blades.

10. The side teeth drill bit of claim 1, wherein: A buckle female is fixedly arranged on the end of the connecting cylinder far from the slag outlet, and the buckle female can be fixedly connected with the buckle male thread at the end of the drill rod.

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