CN104863524A - Drill rod with cutting teeth on helical blade - Google Patents

Abstract

The invention discloses a drill rod with cutting teeth on a helical blade. The drill rod comprises a drill rod assembly, the cutting teeth and tooth seats. The tooth seats are welded to the helical blade, the cutting teeth are installed in the tooth seats and can be pickax-shaped cutting teeth or knife-shaped cutting teeth, and the tooth seats matched with the pickax-shaped cutting teeth and the knife-shaped cutting teeth are different. When the drill rod rotates, the cutting teeth cut coal rock along with rotation of the helical blade. Only one kind of cutting teeth can be arranged on the same drill rod or two kinds of cutting teeth can be arranged on the same drill rod simultaneously, when the two kinds of cutting teeth are arranged simultaneously, the cutting teeth are arranged at intervals. The rotation radiuses of motion trails of tooth tips of the cutting teeth are the same, and the chamfers and the elevation angles of the cutting teeth are the same. The elevation angles and the chamfers of the cutting teeth of the drill rod with different rotation directions and screw pitches of helical blades are different. With the cooperation with a common drill rod, the cutting teeth on the helical blade cut the collapsed coal rock, collapsed drill holes are restored, a buried and pressed drilling tool is relieved, coal rock conveyance is achieved, the problems that in the working process of an auger type coal miner, drill holes collapse, coal conveyance is blocked, and the drilling tool is buried and pressed can be solved, coal mining efficiency is improved, and high practicality is achieved.

Description

A drill pipe with helical blades and picks

technical field

The invention relates to a drill pipe with a helical blade and a pick, which is especially suitable for drilling tools that are buried and pressed when the drilling hole collapses during the drilling operation of a drilling shearer.

Background technique

Shearer is a commonly used equipment for mining thin and extremely thin coal seams, and it can also be used for drilling pressure relief during the construction of mine roadways with high pressure. If the geological conditions are poor, the drill hole will collapse during the working process of the drilling shearer, which will affect the coal transportation effect. method to solve this problem.

Contents of the invention

Technical problem: The object of the present invention is to solve the problem that the collapse of the drill hole in the working process of the drill shearer affects the coal delivery or even the buried pressure drilling tool, and provides a helical blade with a simple structure, avoids drill sticking, and has a good use effect. Toothed drill pipe.

Technical solution: The helical blade drill pipe with picks of the present invention includes a drill pipe assembly, a pick, and a tooth holder; it is characterized in that: the drill pipe assembly includes a drill pipe input end, a drill pipe barrel, and a helical blade , the drill pipe output end and the guide shaft; the drill pipe input end and the drill pipe output end are fixed on the two ends of the drill pipe barrel, and the helical blades are arranged on the outer ring of the drill pipe barrel, consisting of multiple leads, The blades with the same rotation direction and diameter are butt welded; the tooth seat is welded in the groove of the spiral blade; the pick is installed on the tooth seat, and the installation angle of the tooth seat on the spiral blade is determined by the installation angle of the pick .

The pick is a pick-shaped pick or a knife-shaped pick, and the pick-shaped pick or the knife-shaped pick is installed in its corresponding tooth seat.

When the picks are two types of pick picks and knife picks, the pick picks and knife picks are installed in the tooth seat at intervals.

The radius of rotation of the motion track of the tooth tip of the pick on the same drill pipe is the same, the angle between the central axis of the pick and the radial direction of the drill pipe barrel is the same, and the tangential direction between the central axis of the pick and the motion track of the tooth tip of the pick is the same. The tangential angles are also the same.

The direction of rotation of the helical blade is left-handed or right-handed, and the helical blade is single-ended or double-ended. The direction of rotation, pitch and diameter of the helical blade are determined according to the pitch, direction of rotation and diameter of the drill pipe used with it.

The number n of the picks on each drill rod is adjusted according to the pitch and diameter of the helical blades (n=3～6), the picks on the single-head blades are evenly distributed on the blades, and the picks on the double-head blades The corresponding position is offset by 120/n° in accordance with the direction of rotation of the helical blade.

The tangential included angle and the looked-up included angle of the pick are different due to the direction of rotation, pitch and diameter of the helical blades.

Both the drill pipe input end and the drill pipe output end are interchangeable.

Beneficial effects: the present invention is applicable to the coal seam collapse during the drilling operation of the drilling shearer, and the drilling tool is buried under pressure, which affects the coal transportation, and the drill pipe assembly, the pick and the tooth holder are used. The pick is installed in the tooth seat through the elastic retaining ring, and the tooth seat is welded in the groove of the helical blade. When the helical blade rotates, the rotation radius of the pick tooth tip movement track is the same, and the pick central axis is in the same direction as the drill pipe barrel radial direction. The included angles are the same, and the included angles are also the same with the tangential direction of the pick tooth tip motion trajectory. The length of the used helical blade drill pipe with picks, the radius of the helical blade and the number of heads can all be determined according to the actual selection of the drilling rig. The invention is used in conjunction with the drill pipe, and the drill pipe assembly rotates to drive the pick on the helical blade. Cut the collapsed coal and rock, restore the collapsed borehole, release the buried drilling tools, and realize the transportation of coal and rock. Compared with the existing technology, it solves the problems of borehole collapse, coal transportation obstruction, drilling tools buried pressure and so on during the working process of drilling shearer, and greatly improves the coal mining efficiency; its structure is simple, easy to operate, and it is in the field Has wide applicability.

Description of drawings

Fig. 1 is the front view structural diagram of the present invention;

Fig. 2 is a left structural view of the present invention.

In the figure: 1. drilling tool assembly, 2. pick, 3. tooth holder, 4. circlip, 1-1, drill pipe input end, 1-2, drill pipe barrel, 1-3, helical blade, 1-4, drill pipe output end, 1-5, guide shaft, 2-1, pick-shaped pick, 2-2, knife-shaped pick.

Detailed ways

An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, the helical blade drill pipe with picks of the present invention is mainly composed of a drill pipe assembly 1, a pick 2, and a tooth holder 3;

The drill pipe assembly 1 includes a drill pipe input end 1-1, a drill pipe barrel 1-2, a helical blade 1-3, a drill pipe output end 1-4 and a guide shaft 1-5; the drill pipe input end 1-1 and the drill pipe output end 1-4 are fixed at both ends of the drill pipe barrel 1-2, and the helical blade 1-3 is arranged on the outer ring of the drill pipe barrel 1-2, and consists of multiple leads, Blades with the same rotation direction and diameter are butt welded; the tooth seat 3 is welded in the groove of the spiral blade 1-3; the pick 2 is installed on the tooth seat 3, and the tooth seat 3 is on the spiral blade 1-3 The installation angle is determined by the installation angle of pick 2.

The pick 2 is a pick pick 2-1 or a knife pick 2-2, and the pick pick 2-1 or the knife pick 2-2 is installed in its corresponding tooth seat 3.

When the pick 2 is a pick pick 2-1 and a knife pick 2-2, the pick pick 2-1 and the knife pick 2-2 are installed in the tooth seat 3 at intervals.

The radius of rotation of the motion track of the tip of the pick 2 on the same drill pipe is the same, the central axis of the pick 2 is the same as the upward angle of the radial direction of the drill pipe barrel 1-2, and the central axis of the pick 2 is the same as that of the pick 2 The tangential included angle in the tangential direction of the tooth tip motion trajectory is also the same.

The direction of rotation of the helical blade 1-3 is left-handed or right-handed, and the helical blade 1-3 is single-ended or double-ended. The direction of rotation, pitch and diameter of the helical blade 1-3 are based on the pitch , direction of rotation and diameter determination.

As shown in Figure 2, the number n of the picks 2 on each drill pipe is adjusted from n=3 to 6 according to the pitch and diameter of the helical blades 1-3, and the picks 2 on the single-head blades are evenly distributed on the blades. Above, the corresponding position of the pick 2 on the double-headed blade is offset by 120/n° in accordance with the direction of rotation of the helical blade.

The tangential angle and the bottom angle of the pick 2 are different due to the helical blade 1-3's direction of rotation, pitch and diameter.

Both the drill pipe input end 1-1 and the drill pipe output end 1-4 are interchangeable.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (8)

1. A helical blade drill pipe with picks, including a drill pipe assembly (1), a pick (2), and a tooth seat (3); it is characterized in that: the drill pipe assembly (1) includes a drill pipe Input end (1-1), drill pipe barrel (1-2), helical blade (1-3), drill pipe output end (1-4) and guide shaft (1-5); said drill pipe input end ( 1-1) and the drill pipe output end (1-4) are fixed at both ends of the drill pipe barrel (1-2), and the helical blades (1-3) are arranged outside the drill pipe barrel (1-2) On the ring, it is formed by butt welding of multiple blades with the same lead, rotation and diameter; the tooth seat (3) is welded in the groove of the spiral blade (1-3); the pick (2) is installed on On the tooth seat (3), the installation angle of the tooth seat (3) on the helical blade (1-3) is determined by the installation angle of the pick (2). 2. A helical blade drill pipe with picks according to claim 1, characterized in that: the picks (2) are pick picks (2-1) or knife picks (2-2 ), the pick pick (2-1) or knife pick (2-2) is installed in its corresponding tooth seat (3). 3. A helical blade drill pipe with picks according to claim 1, characterized in that: the picks (2) are pick-shaped picks (2-1) and knife-shaped picks (2-2 ) two types, the pick-shaped pick (2-1) and the knife-shaped pick (2-2) are installed in the tooth seat (3) at intervals. 4. A helical blade drill pipe with picks according to claim 1, characterized in that: the trajectories of the tooth tips of the picks (2) on the same drill pipe have the same rotation radius, and the picks (2) ) central axis and the radial direction of the drill pipe barrel (1-2) have the same look-up angle, and the tangential included angle between the central axis of the pick (2) and the tangential direction of the motion track of the tooth tip of the pick (2) is also the same. 5. A drill pipe with helical blades and picks according to claim 1, characterized in that: the helical blades (1-3) are left-handed or right-handed, and the helical blades (1-3) are Single head or double head, the direction of rotation, pitch and diameter of the helical blades (1-3) are determined according to the pitch, direction of rotation and diameter of the drill pipe used with it. 6. A helical blade drill pipe with picks according to claim 1, characterized in that: the number n of the picks (2) on each drill pipe depends on the pitch of the helical blades (1-3) and diameter adjustment (n=3~6), the picks (2) on the single-headed blades are evenly distributed on the blades, and the corresponding positions of the picks (2) on the double-headed blades are offset by 120/n° in accordance with the direction of rotation of the helical blades . 7. A helical blade drill pipe with picks according to claim 1, characterized in that: the tangential angle and the upward angle of the pick (2) are due to the rotation of the helical blade (1-3). The orientation, pitch and diameter vary. 8. A helical blade drill pipe with picks according to claim 1, characterized in that: the drill pipe input end (1-1) and the drill pipe output end (1-4) have interchangeable sex.