Separable rotary excavating barrel drill

Abstract

The utility model relates to the technical field of rotary excavating cylinder drills, in particular to a separable rotary excavating cylinder drill which comprises an upper cylinder drill and a lower cylinder drill which are distributed up and down, the outer ring of the upper cylinder drill is provided with chip removal threads, drill bits are evenly arranged below the lower cylinder drill, and fixing bosses which are larger than the upper cylinder drill in number and are evenly distributed are arranged below the upper cylinder drill. Limiting bosses which are the same as the fixing bosses in number and are evenly distributed are arranged above the lower barrel drill, and the limiting bosses and the fixing bosses are locked and fixed through bolts and nuts. The utility model has the advantages that: 1, the bolt is axially arranged, the two sides of the bolt are connected through the nut, and the stop pins are arranged on the two sides of the nut, thereby avoiding looseness caused by vibration; and secondly, the limiting boss is fixedly connected with the fixed boss, so that the situation that the bolt is cut off and deeply sinks into the rock stratum due to too large radial force is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary digging cylinder drill technical field, concretely is detachable rotary digging cylinder drill. BACKGROUND

[0002] When the rotary drilling rig drills in the rock stratum, the cylinder drill is often used to drill first, and then the whole rock core is taken out by relying on the jamming effect of the bottom of the cylinder drill. This drilling method has high construction efficiency and has been widely used in rock stratum drilling. In the operation of pouring out the rock core, the drill bit is often shaken up and down and left and right to pour out the rock core. This operation has great noise pollution, and it takes about 20 minutes to pour out the rock core, and some even take 1 hour, which greatly affects the efficiency of rock stratum drilling. This operation shakes the drill bit and drill rod frequently to pour out the rock core, which greatly damages the drill bit and drill rod and greatly reduces the service life of the drill bit and drill rod.

[0003] The detachable rotary digging cylinder drill of patent document No. CN204200087U has a split drill bit body, a through hole is arranged on the bottom side of the upper cylinder assembly, a connecting plate is arranged on the upper surface of the lower cylinder assembly, a connecting hole corresponding to the threaded hole of the upper cylinder assembly is arranged on the connecting plate, the threaded hole and the connecting hole are connected by a connecting piece, the structure is simple, the connection method is easy to realize, the drill bit body is simply separated into two parts, the rock core can be quickly poured out, it takes about 3 minutes to pour out the rock core on average, time and labor are saved, the protection of the drill bit and drill rod is further enhanced, the service life of the drill bit and drill rod is prolonged, noise pollution is eliminated, and the efficiency of rock stratum drilling is greatly improved. The stability of the structure in operation is further improved through the cooperation of the torque block and the torque groove.

[0004] However, the above mechanism has the following problems: first, the radial bolt connection is prone to looseness due to large vibration during drilling; second, due to the high strength of the rock core, the radial force is large during drilling, which can easily cut off the bolt, causing the lower drill cylinder to sink into the rock stratum or causing failure. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a detachable rotary digging cylinder drill to solve the problems in the above background technology.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a detachable rotary digging cylinder drill, including an upper cylinder drill 4 and a lower cylinder drill 1 distributed upward and downward, the outer ring of the upper cylinder drill 4 is provided with a row of cutting threads 5, the lower part of the lower cylinder drill 1 is provided with uniformly arranged drill bits, characterized in that: the lower part of the upper cylinder drill 4 is provided with more than three fixed bosses 2, the upper part of the lower cylinder drill 1 is provided with the same number of limiting bosses 3 as the fixed bosses 2, and the limiting bosses 3 and the fixed bosses 2 are locked and fixed by bolts 7 and nuts 10.

[0007] Further, the limiting boss 3 and the fixed boss 2 are provided with recessed and protruding grooves 8.

[0008] Further, the fixed boss 2 is provided with mounting grooves 6 for placing nuts 10.

[0009] Further, the nut 10 is provided with a limiting pin 11 on the outside and a spring pad 9 on the inside.

[0010] Further, the protruding distance of the limiting boss 3 and the fixed boss 2 does not exceed the drill tip of the drill bit below the lower tube drill 1.

[0011] The utility model has the following beneficial effects: 1. the bolt is axially arranged and connected through nuts on both sides, and the nuts are provided with limiting pins on both sides to avoid loosening caused by vibration; 2. the limiting boss and the fixed boss are fixedly connected to avoid bolt cutting and deepening in the rock layer caused by too large radial force. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of the utility model;

[0013] Figure 2 It is Figure 1 the sectional view of A-A in Fig.

[0014] Figure 3 It is Figure 2 the local enlarged view of the connecting mechanism.

[0015] In the figure: 1, lower tube drill, 2, fixed boss, 3, limiting boss, 4, upper tube drill, 5, row of cutting threads, 6, mounting groove, 7, bolt, 8, recessed and protruding groove, 9, spring pad, 10, nut, 11, limiting pin. DETAILED DESCRIPTION

[0016] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0017] Please refer to Figures 1-3 The utility model provides a technical scheme: detachable rotary digging tube drill, including upper and lower distribution upper tube drill 4 and lower tube drill 1, the outer ring of upper tube drill 4 is provided with row of cutting threads 5, and the lower part of lower tube drill 1 is provided with uniform arrangement drill bit.

[0018] The upper part of the drill 4 is provided with fixed bosses 2, the number of which is more than 3 and is equally distributed, the upper part of the lower part of the drill 1 is provided with limiting bosses 3, the number of which is the same as that of the fixed bosses 2 and is equally distributed, the limiting bosses 3 are matched with the fixed bosses 2, and the two are locked and fixed by bolts 7 and nuts 10.

[0019] In order to increase the friction and contact area between the two, and improve the radial shear resistance, the limiting bosses 3 and the fixed bosses 2 are provided with matching concave-convex grooves 8.

[0020] In order to avoid the bolts from falling off or being impacted during drilling, the outer side of the fixed bosses 2 is provided with mounting grooves 6 for placing the nuts 10, and the outer side of the nuts 10 is provided with limiting pins 11 and the inner side is provided with elastic pads 9.

[0021] The protruding distance of the limiting bosses 3 and the fixed bosses 2 does not exceed the drill tip of the lower part of the drill 1, so as to ensure that the bosses do not affect the shape and speed of drilling.

[0022] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A separable rotary drilling rig, comprising an upper drilling rig (4) and a lower drilling rig (1) distributed vertically, wherein the outer circumference of the upper drilling rig (4) is provided with a cutting thread (5), and the lower drilling rig (1) is provided with uniformly arranged drill bits below it, characterized in that: The upper cylindrical drill (4) is provided with more than 3 evenly distributed fixed bosses (2) below, and the lower cylindrical drill (1) is provided with the same number of evenly distributed limiting bosses (3) above the fixed bosses (2). The limiting bosses (3) and the fixed bosses (2) are locked and fixed by bolts (7) and nuts (10).

2. The detachable rotary drilling rig according to claim 1, characterized in that: The limiting boss (3) and the fixing boss (2) are provided with mutually cooperating grooves (8).

3. The detachable rotary drilling rig according to claim 1, characterized in that: The outer side of the fixed boss (2) is provided with a mounting groove (6) for placing nuts (10).

4. The detachable rotary drilling rig according to claim 1, characterized in that: The nuts (10) are provided with stop pins (11) on the outside and spring washers (9) on the inside.

5. The detachable rotary drilling rig according to claim 1, characterized in that: The distance between the protruding limiting boss (3) and the fixed boss (2) shall not exceed the drill tip of the drill bit below the lower cylinder drill (1).

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