Cylinder drill for drilling rock stratum

Abstract

The utility model discloses a barrel drill for drilling a rock stratum, and relates to the technical field of drilling of rotary drilling rigs. The drill bit comprises a connecting square head, an outer cylinder and an inner cylinder, and is characterized in that a plurality of groups of drill teeth are arranged at the lower ends of the outer cylinder and the inner cylinder; each group of drill teeth comprises an inner tooth tip, a middle tooth tip and an outer tooth tip; the drill teeth are in a plate shape. The sharp end of the inner tooth tip faces the inner sides of the multiple sets of drill teeth. The sharp end of the outer tooth tip faces the outer sides of the multiple sets of drill teeth. Cutting teeth matched with the drilling teeth are arranged at the lower end of the inner cylinder, and the lower ends of the drilling teeth are lower than the lower ends of the cutting teeth, so that the lower ends of the drilling teeth firstly make contact with a rock stratum during tapping. The utility model has the beneficial effects that the structure effectively avoids the problems of displacement and sliding of the drill bit when the drill cylinder drills, and can more conveniently and quickly finish trepanning.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary drilling rig hole opening, in particular to a cylinder drill for rock layer hole opening. Background Art

[0002] A rotary drilling rig is a construction machine suitable for hole forming operations in building foundation engineering. When opening a hole in bedrock or in a "semi-rock and semi-soil" formation caused by solution grooves, solution troughs, and rock teeth through a rotary drilling rig, if a traditional pick cylinder drill is used for hole opening, due to the high strength of the rock and the inclination of the rock layer, the pick cylinder drill for hole opening will shift and slide, and the position of the pick cylinder drill needs to be adjusted repeatedly. When pressure is applied for drilling, the deviation trend of the drill bit is aggravated. A large amount of time is required for hole opening, the picks are severely worn, and it is inconvenient to use. Therefore, a cylinder drill structure for rock layer hole opening that adapts to this situation is needed to solve the problems of cylinder drill displacement, sliding, and low hole opening efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a cylinder drill for rock layer hole opening aiming at the above-mentioned existing technical deficiencies. This structure effectively avoids the problems of drill bit displacement and sliding during the drilling of the drill cylinder, and is more convenient and fast to complete hole opening.

[0004] The technical solution adopted by the utility model is: to provide a cylinder drill for rock layer hole opening, including a connecting square head, an outer cylinder body, and an inner cylinder body, characterized in that: multiple groups of drill teeth are arranged at the lower ends of the outer cylinder body and the inner cylinder body; each group of drill teeth includes an inner tooth tip, a middle tooth tip, and an outer tooth tip; the shape of the drill teeth is plate-shaped; the sharp end of the inner tooth tip faces the inside of the multiple groups of drill teeth; the sharp end of the outer tooth tip faces the outside of the multiple groups of drill teeth; a pick matching with the drill teeth is arranged at the lower end of the inner cylinder body, and the lower end of the drill teeth is lower than the lower end of the pick, so that the lower end of the drill teeth contacts the rock layer first during hole opening.

[0005] To further optimize this technical solution, the drill teeth and picks of the cylinder drill for rock layer hole opening are fixedly connected to the corresponding outer cylinder body and inner cylinder body.

[0006] To further optimize this technical solution, the drill teeth and picks of the cylinder drill for rock layer hole opening are fixedly connected by welding to the corresponding outer cylinder body and inner cylinder body.

[0007] To further optimize this technical solution, multiple groups of drill teeth of the cylinder drill for rock layer hole opening are evenly distributed along a circular ring.

[0008] To further optimize this technical solution, the outer cylinder body of the cylinder drill for rock layer hole opening is located outside the inner cylinder body.

[0009] To further optimize this technical solution, the connecting square head, the outer cylinder body, and the inner cylinder body of the cylinder drill for rock layer hole opening are fixedly connected.

[0010] Compared with the traditional information collection device, the beneficial effects of the utility model are as follows:

[0011] 1. The settings of the outer cylinder, inner tooth tips, middle tooth tips, outer tooth tips, and drill teeth. When the plate-shaped drill teeth drill in the inclined rock formation, the barrel drill rotates smoothly with little vibration, and can quickly create grooves on the inclined rock formation, thus effectively avoiding the problems of drill bit displacement and sliding during the drilling of the drill barrel.

[0012] 2. The cooperation of the inner cylinder, drill teeth, and pick teeth expands the hole grooves drilled by the drill teeth, prevents the increase of the frictional force for the rotation of the inner cylinder, locates the drilling of the outer cylinder, further prevents the outer cylinder from tilting during drilling, and also reduces the drilling resistance of the outer cylinder, making it more convenient and faster to drill.

[0013] 3. Both the drill teeth and the pick teeth are fixedly welded to the corresponding outer cylinder and inner cylinder, facilitating re-welding after falling off; multiple groups of drill teeth are evenly distributed along the circular ring, and the hole opening is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is a schematic structural view of the bottom perspective of the present utility model;

[0016] Figure 3 is a schematic structural view of another perspective of the present utility model;

[0017] In the figure, 1. connecting square head; 2. outer cylinder; 3. inner cylinder; 4. drill teeth; 5. inner tooth tips; 6. middle tooth tips; 7. outer tooth tips; 8. pick teeth. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0019] As Figures 1-3 shown, the barrel drill for rock formation hole opening includes a connecting square head 1, an outer cylinder 2, and an inner cylinder 3, and is characterized in that: multiple groups of drill teeth 4 are provided at the lower ends of both the outer cylinder 2 and the inner cylinder 3; each group of drill teeth 4 includes inner tooth tips 5, middle tooth tips 6, and outer tooth tips 7; the shape of the drill teeth 4 is plate-shaped; the sharp ends of the inner tooth tips 5 face the inside of the multiple groups of drill teeth 4; the sharp ends of the outer tooth tips 7 face the outside of the multiple groups of drill teeth 4; pick teeth 8 cooperating with the drill teeth 4 are provided at the lower end of the inner cylinder 3, and the lower ends of the drill teeth 4 are lower than the lower ends of the pick teeth 8 so that the lower ends of the drill teeth 4 contact the rock formation first during hole opening; both the drill teeth 4 and the pick teeth 8 are fixedly connected to the corresponding outer cylinder 2 and inner cylinder 3; both the drill teeth 4 and the pick teeth 8 are fixedly welded to the corresponding outer cylinder 2 and inner cylinder 3; multiple groups of drill teeth 4 are evenly distributed along the circular ring; the outer cylinder 2 is located outside the inner cylinder 3; the connecting square head 1, the outer cylinder 2, and the inner cylinder 3 are fixedly connected.

[0020] The specific structures of the inner tooth tip 5, the middle tooth tip 6, and the outer tooth tip 7 are as follows Figure 2 shown; the sharp end of the inner tooth tip 5 faces the inside of the multiple groups of drill teeth 4, and the sharp end of the outer tooth tip 7 faces the outside of the multiple groups of drill teeth 4. The specific structure is as follows Figure 2 shown; the lower end of the drill tooth 4 is lower than the lower end of the pick 8, so that the lower end of the drill tooth 4 contacts the rock formation first when opening a hole. The specific position is as follows Figure 3 shown;

[0021] During use, the inner tooth tip 5, the middle tooth tip 6, and the outer tooth tip 7 are provided on the outer cylinder 2. Because the drill teeth 4 are plate-shaped, as Figure 2 shown, the plate-shaped drill teeth 4 are relatively sharp and sharp, and rotate more smoothly. When drilling in an inclined rock formation, the barrel drill rotates smoothly with little vibration, and can quickly cut a groove on the inclined rock formation, successfully completing the positioning of the hole. The plate-shaped drill teeth 4 are not prone to sliding displacement, thus effectively avoiding the problems of drill bit displacement and sliding during the drilling of the drill barrel;

[0022] With the setting of the inner cylinder 3, the drill teeth 4 on the inner cylinder 3 contact the ground first, cut a groove on the rock formation, and when the picks 8 rotate, they rotate along the groove. The holes and grooves cut by the drill teeth 4 on the inner cylinder 3 are enlarged, so as to cut a wider hole and groove, so that the inner cylinder 3 does not contact the surface of the rock formation hole during drilling, preventing the increase of the frictional force of the inner cylinder 3 rotation due to contact with the surface. After the inner cylinder 3 finishes drilling, the inner cylinder 3 positions the drilling of the outer cylinder 2 in the hole, further preventing the outer cylinder 2 from tilting during drilling. Moreover, when the outer cylinder 2 drills, because the inner cylinder 3 already has a hole and a relatively wide central hole groove, the relatively wide central hole groove also provides space for the movement of the crushed stones and soil inside the outer cylinder 2 after drilling, thus reducing the resistance of rotational contact with the surface of the rock formation hole and facilitating faster drilling;

[0023] The drill teeth 4 and the picks 8 are both welded and fixed to the corresponding outer cylinder 2 and inner cylinder 3, which is convenient for re-welding after falling off; the multiple groups of drill teeth 4 are evenly distributed along the circular ring, and the hole opening is more stable.

[0024] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modification examples falling within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A rock formation drilling drill, comprising a connecting square head (1), an outer cylinder (2) and an inner cylinder (3), characterized in that: A plurality of groups of drill teeth (4) are arranged at the lower ends of the outer cylinder (2) and the inner cylinder (3); each group of drill teeth (4) comprises an inner tooth tip (5), a middle tooth tip (6) and an outer tooth tip (7); the drill teeth (4) are plate-shaped; the sharp ends of the inner tooth tips (5) face the inside of the plurality of groups of drill teeth (4); and the sharp ends of the outer tooth tips (7) face the outside of the plurality of groups of drill teeth (4); The lower end of the inner cylinder (3) is provided with a pick (8) that cooperates with the drill tooth (4), and the lower end of the drill tooth (4) is lower than the lower end of the pick (8), so that the lower end of the drill tooth (4) contacts the rock layer first when drilling a hole.

2. The rock formation drilling barrel according to claim 1, characterized in that: The drill teeth (4) and the pick teeth (8) are both fixedly connected to the corresponding outer cylinder (2) and inner cylinder (3).

3. The rock formation drilling barrel according to claim 2, characterized in that: The drill teeth (4) and the pick teeth (8) are both welded and fixed to the corresponding outer cylinder (2) and inner cylinder (3).

4. The rock formation drilling barrel according to claim 1, characterized in that: The multiple groups of drill teeth (4) are evenly distributed along the circular ring shape.

5. The rock formation drilling barrel according to claim 1, characterized in that: The outer cylinder (2) is located outside the inner cylinder (3).

6. The rock formation drilling barrel according to claim 1, characterized in that: The connecting square head (1), the outer cylinder (2) and the inner cylinder (3) are fixedly connected.

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