CN105201410A - Combined rotary excavation drilling tool - Google Patents

Abstract

The invention discloses a combined rotary drilling tool, which comprises a connecting square head, an outer drilling tool, an inner drilling tool and a hydraulic oil cylinder; the top of the outer drilling tool and the top of the hydraulic oil cylinder are connected with the connecting square head, the hydraulic oil cylinder and the The inner drilling tools are located inside the outer drilling tool; the upper end of the inner drilling tool is connected with the hydraulic cylinder, the lower end of the inner drilling tool is provided with a central drill tooth, the side of the inner drilling tool is provided with a helical blade, and the helical blade is connected with the inner wall of the outer drilling tool. There is a gap, the bottom of the helical blade is provided with inner drill teeth; the side wall of the outer drill tool is provided with water holes, and the end surface of the bottom of the outer drill tool is provided with a number of outer drill teeth. The invention has the advantages of good slag unloading effect and large volume.

Description

A combined rotary drilling tool

technical field

The invention belongs to the field of construction machinery and relates to a drilling tool, in particular to a combined rotary drilling tool.

Background technique

With the rapid development of my country's economy, the scope of infrastructure construction is constantly expanding. Rotary drilling rigs have been widely used in infrastructure construction because of their high efficiency, low pollution, flexibility and many functional combinations. In recent years, due to the gradual increase in the construction proportion of rotary drilling rigs in foundation engineering, the efficiency of rotary drilling rigs in various stratum constructions has become more and more obvious.

In the construction of basic engineering, there are currently two types of rotary drilling tools. One is the barrel drill, which has a large capacity, strong soil-carrying ability, and high efficiency. The body is slender, and there is a problem of difficulty in unloading slag, especially when drilling into cohesive formations and highly cemented formations, the clay will be bonded to the inner side of the barrel wall, making it extremely difficult to unload slag, and the slag unloading time is long, resulting in The construction efficiency is greatly reduced; the other type is the auger drilling tool, which is widely used in the construction of hard ground. Compared with the barrel drill, the auger drilling tool is convenient for unloading slag, because of its good guiding performance, the hole-forming quality is better than that of the barrel drill. However, the capacity of the auger drill is small, and the soil-carrying ability is not as good as that of the barrel drill, so the work efficiency is low.

Since the drilling tool is one of the key components of the rotary drilling rig, the drilling tool directly affects the working efficiency of the whole machine. Therefore, how to improve the drilling tool structure of the rotary drilling rig and improve its working efficiency is a technical problem that needs to be solved at present.

Contents of the invention

The object of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a combined rotary drilling tool, which has the advantages of good slag unloading effect and large volume.

In order to achieve the above object, the combined rotary drilling tool of the present invention includes a connecting square head, an outer drilling tool, an inner drilling tool and a hydraulic cylinder;

The top of the outer drilling tool and the top of the hydraulic cylinder are connected with the connecting square head, and the hydraulic cylinder and the inner drilling tool are located in the outer drilling tool;

The upper end of the inner drilling tool is connected with the hydraulic cylinder, the lower end of the inner drilling tool is provided with a central drill tooth, the side of the inner drilling tool is provided with a helical blade, and there is a gap between the helical blade and the inner wall of the outer drilling tool, and the bottom of the helical blade is provided with an inner Drill teeth;

A water hole is opened on the side wall of the outer drilling tool, and a plurality of outer drilling teeth are arranged on the end surface of the bottom of the outer drilling tool.

The outer side of the outer drilling tool is provided with a gauge bar with a helical structure.

The connecting square head includes a connecting square head fixing seat, a support plate and several ribs. The supporting plate is fixed on the connecting square head fixing seat. The fixing seat is connected with the top of the external equipment and the hydraulic oil cylinder, and the side of the rib plate is provided with a rib plate hole for connecting the external hook.

The upper end of the hydraulic cylinder is provided with a first fixed seat, the first fixed seat is connected with the connecting square head fixed seat, and the hydraulic cylinder is connected with the first hydraulic cylinder rod, the second hydraulic cylinder rod and the third hydraulic cylinder rod which are connected up and down in sequence , the lower end of the third hydraulic cylinder rod is provided with a second fixed seat, and the top of the inner drilling tool is provided with a third fixed seat connected with the second fixed seat.

The axis of the outer drilling tool, the axis of the inner drilling tool and the axis of the hydraulic cylinder are on a straight line.

The cylinder wall of the inner drilling tool is a straight cylinder, and the inner drilling tool is a single-head helical drilling tool.

The connecting square head fixing seat is provided with a first pin hole and a second pin hole for connecting external equipment;

The first fixing seat is provided with a third pin hole, and the first pin shaft passes through the first pin hole and the third pin hole to connect the first fixing seat with the connecting square head fixing seat;

The second fixed seat is provided with a fourth pin hole, the third fixed seat is provided with a fifth pin hole, and the second pin shaft passes through the fourth pin hole and the fifth pin hole to connect the second fixed seat with the third fixed seat. connect.

The upper end of the third fixing base is provided with a groove, and the second fixing base is embedded in the groove.

The number of ribs is 4 pieces;

The number of outer drill teeth is 12.

The hydraulic cylinder is a telescopic cylinder.

The present invention has the following beneficial effects:

The combined rotary drilling tool of the present invention combines the advantages of the barrel drill and the spiral drilling tool. The outer drilling tool is equipped with a hydraulic cylinder, an inner drilling tool and a center drill tooth. In the helical blade, the muck is piled on the upper part of the outer drilling tool. Since there is a gap between the helical blade and the inner wall of the outer drilling tool, the dregs are prevented from sticking to the inner wall of the outer drilling tool. The slag discharge effect is better and the volume is larger, which effectively solves the difficult problem of slag discharge by the barrel drill and greatly improves the construction efficiency.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of connecting square head 1 among the present invention;

Fig. 3 is a schematic structural view of the inner drilling tool 3 in the present invention;

FIG. 4 is a positional relationship diagram between the second fixing seat 46 and the third fixing seat 31 in the present invention;

Fig. 5 is the structural representation of Chinese and foreign drilling tool 2 of the present invention;

Fig. 6 is the distribution diagram of outer drill tooth 22 in the present invention;

Fig. 7 is a bottom view of the present invention.

Among them, 1 is the connecting square, 2 is the outer drilling tool, 3 is the inner drilling tool, 4 is the hydraulic cylinder, 11 is the fixing seat of the connecting square head, 12 is the support plate, 13 is the rib hole, 14 is the rib plate, 15 is The first pin hole, 21 is the gauge strip, 22 is the outer drill tooth, 23 is the water hole, 31 is the third fixed seat, 32 is the inner drill tooth, 33 is the center drill tooth, 34 is the spiral blade, 35 is the fifth Pin hole, 41 is the third pin hole, 42 is the first fixed seat, 43 is the first hydraulic cylinder rod, 44 is the second hydraulic cylinder rod, 45 is the third hydraulic cylinder rod, 46 is the second fixed seat.

Detailed ways

The present invention is described in further detail below in conjunction with accompanying drawing:

With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the combined rotary drilling tool of the present invention comprises a connecting square head 1, an outer drilling tool 2, an inner drilling tool 3 and Hydraulic cylinder 4; the top of the outer drilling tool 2 and the top of the hydraulic cylinder 4 are connected to the connecting square head 1, the hydraulic cylinder 4 and the inner drilling tool 3 are located in the outer drilling tool 2; the upper end of the inner drilling tool 3 is connected to the hydraulic cylinder 4 are connected, the lower end of the inner drilling tool 3 is provided with a central drill tooth 33, the side of the inner drilling tool 3 is provided with a helical blade 34, the helical blade 34 has a gap with the inner wall of the outer drilling tool 2, and the bottom of the helical blade 34 is provided with an inner Drilling teeth 32; water holes 23 are provided on the side wall of the outer drilling tool 2, and a number of outer drilling teeth 22 are provided on the end surface of the bottom of the outer drilling tool 2; a gauge strip 21 of a spiral structure is provided on the outer side of the outer drilling tool 2 , the axis of the outer drilling tool 2, the axis of the inner drilling tool 3 and the axis of the hydraulic cylinder 4 are on a straight line, the cylinder wall of the inner drilling tool 3 is a straight cylinder, and the inner drilling tool 3 is a single-head auger drilling tool.

It should be noted that the connection square head 1 includes a connection square head fixing seat 11, a support plate 12 and several ribs 14, the support plate 12 is fixed on the connection square head fixing seat 11, and the upper and lower ends of the rib plate 14 are connected to the support plate respectively. 12 and the top of the outer drilling tool 2 are connected, the square head holder 11 is connected with the top of the external equipment and the hydraulic cylinder 4, and the side of the rib 14 is provided with a rib hole 13 for connecting the external hook. The upper end of the hydraulic cylinder 4 is provided with a first fixed seat 42, the first fixed seat 42 is connected with the square head fixed seat 11, and the hydraulic cylinder 4 is connected with the first hydraulic cylinder rod 43 and the second hydraulic cylinder rod which are connected up and down in sequence. 44 and the third hydraulic cylinder rod 45, the lower end of the third hydraulic cylinder rod 45 is provided with the second fixed seat 46, and the top of the inner drilling tool 3 is provided with the third fixed seat 31 connected with the second fixed seat 46.

Specifically, the connecting square head fixing base 11 is provided with a first pin hole 15 and a second pin hole for connecting external equipment; the first fixing base 42 is provided with a third pin hole 41, and the first pin shaft passes through the second pin hole. A pin hole 15 and the third pin hole 41 connect the first fixed seat 42 with the square head fixed seat 11; the second fixed seat 46 is provided with the fourth pin hole, and the third fixed seat 31 is provided with the fifth pin hole 35, the second pin shaft passes through the fourth pin hole and the fifth pin hole 35 to connect the second fixed seat 46 with the third fixed seat 31; the upper end of the third fixed seat 31 is provided with a groove, and the second fixed seat 46 is embedded in the groove; the number of ribs 14 is 4; the number of outer drill teeth 22 is 12; the hydraulic cylinder 4 is a telescopic cylinder.

The main function of the inner drilling tool 3 is to drill and take soil. Before drilling, the hydraulic cylinder 4 is stretched out, and the central drill tooth 33 is connected to the bottom end of the third hydraulic cylinder rod 45. Under the pressure of the hydraulic cylinder 4, the size of the central drill tooth 33 Greater than the size of the inner drill teeth 32, the center drill teeth 33 first contact the soil layer, press into the soil layer, rotate into the soil layer, and form a good axial positioning for the inner drill tool 3, when the center drill teeth 33 enter the soil layer Appropriate depth, the inner drill teeth 32 start to contact the soil layer, the inner drill tool 3 rotates with the hydraulic cylinder rod, the inner drill teeth 32 start to cut the soil layer, and the soil residue will enter the helical blade 34, and as the helical blade 34 moves from bottom to For stacking, the function of the spiral blade 34 is to transport and carry soil residue.

The working principle of the present invention is: when drilling into working conditions, the connecting square head 1 is connected to the drill pipe, and the torque from the power head of the rotary drilling rig and the pressure of the pressurized oil cylinder are transmitted, and the combined rotary drilling drill described in the present invention The tool rotates and drills downward; the specific drilling steps are as follows: the hydraulic cylinder 4 drives the rod 45 of the third hydraulic cylinder to extend, and pushes the inner drilling tool 3 to move downward. When the inner drilling tool 3 exceeds the bottom of the outer drilling tool 2 , began to contact the soil layer, because the size of the center drill tooth 33 is greater than the size of the inner drill tooth 32, the center drill tooth 33 is driven by the power head to rotate the drill to the soil layer under the pressure of the pressurized oil cylinder and the hydraulic cylinder 4. Advance, when the center drill tooth 33 enters the soil layer, since each hydraulic cylinder rod connected to the center drill tooth 33, the inner drill tool 3 and the outer drill tool 2 are coaxial, the center drill tooth 33 can give the inner drill tool 3 and the outer drill tool Tool 2 is well axially positioned to prevent drilling deviation; then the inner drill tooth 32 starts to contact the soil layer, and rotates to cut the soil layer, and the cut soil residue will be stored on the helical blade 34, along with the inner drill tooth 3 deep drilling, the outer drilling tool 2 begins to contact the soil layer, because the diameter of the drill barrel of the outer drilling tool 2 is greater than the diameter of the helical blade 34, so the outer drilling tool 2 will continue on the outside of the hole drilled by the inner drilling tool 3 Drill, expand the diameter of the drilled hole, and collect the soil slag into the inside of the drill tube of the outer drilling tool 2, and in the process of drilling down, the soil slag will go along the spiral blade 34 of the inner drilling tool 3 The helical path moves upwards and finally enters the inside of the drill barrel of the outer drilling tool 2;

When unloading slag, the hydraulic cylinder 4 drives the rod 45 of the third hydraulic cylinder to shrink inward, thereby driving the inner drilling tool 3 to move upward until the inner drilling tool 3 is completely retracted into the drill barrel of the outer drilling tool 2, and the rotary drilling rig rolls The lifting system starts to lift the drill pipe, and the drill pipe drives the combined rotary drilling tool of the present invention to move upward. After the slewing mechanism of the machine drives the combined rotary drilling tool of the present invention to rotate to the position of unloading soil, the hydraulic cylinder 4 drives each hydraulic cylinder rod to extend until the inner drilling tool 3 is fully extended to the drilling position of the outer drilling tool 2. As far as the outside of the cylinder, the power head starts to reverse, and the soil is centrifugally thrown at a high speed to realize slag unloading.

The reason why the combined rotary drilling tool designed by the present invention can easily unload soil is that: during the drilling operation, slag is accumulated on the drill barrel of the outer drilling tool 2 and the helical blade 34, and the inner wall of the helical blade 34 and the outer drilling tool 2 There is a certain gap, and the slag inside the drill pipe of the outer drilling tool 2 is supported by the helical blade 34, and can be stored in the position inside the drill pipe at the upper part of the helical blade 34, at the gap between the helical blade 34 and the inner wall of the drill pipe , due to the lack of support, there is almost no slag in the gap, so the cohesive soil and the inner wall of the drill pipe lack sufficient extrusion to form a viscous force, so when the soil is thrown away, the inner drilling tool 3 is pushed to the outside of the outer drilling tool 2 by the hydraulic cylinder 4 , the slag inside the drill pipe falls to the ground automatically under the action of gravity, and the power head reverses and stops suddenly, so that the slag on the screw blade 34 is also unloaded.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A combined rotary drilling tool, characterized in that it comprises a connecting square head (1), an outer drilling tool (2), an inner drilling tool (3) and a hydraulic cylinder (4); The top of the outer drilling tool (2) and the top of the hydraulic cylinder (4) are connected with the connecting square head (1), and the hydraulic cylinder (4) and the inner drilling tool (3) are all located in the outer drilling tool (2); The upper end of the inner drilling tool (3) is connected with the hydraulic cylinder (4), the lower end of the inner drilling tool (3) is provided with a center drill tooth (33), and the side of the inner drilling tool (3) is provided with a helical blade (34), There is a gap between the helical blade (34) and the inner wall of the outer drilling tool (2), and the bottom of the helical blade (34) is provided with inner drill teeth (32); A water hole (23) is provided on the side wall of the outer drilling tool (2), and a plurality of outer drilling teeth (22) are arranged on the end surface of the bottom of the outer drilling tool (2). 2. The combined rotary drilling tool according to claim 1, characterized in that, the outside of the outer drilling tool (2) is provided with a gauge strip (21) in a spiral structure. 3. The combined rotary drilling tool according to claim 1, characterized in that the connecting square head (1) comprises a connecting square head fixing seat (11), a support plate (12) and several ribs (14), supporting Plate (12) is fixed on the connection square head holder (11), and the upper and lower ends of the rib plate (14) are respectively connected with the top of the support plate (12) and the outer drilling tool (2), and the connection square head holder ( 11) It is connected with the top of the external equipment and the hydraulic cylinder (4), and the side of the rib (14) is provided with a rib hole (13) for connecting the external hook. 4. The combined rotary drilling tool according to claim 3, characterized in that, the upper end of the hydraulic cylinder (4) is provided with a first fixed seat (42), and the first fixed seat (42) is connected to the square head fixed seat (11) are connected, the hydraulic cylinder (4) is connected with the first hydraulic cylinder rod (43), the second hydraulic cylinder rod (44) and the third hydraulic cylinder rod (45) connected up and down in sequence, the third hydraulic cylinder rod The lower end of (45) is provided with the second fixed seat (46), and the top of inner drilling tool (3) is provided with the third fixed seat (31) that is connected with the second fixed seat (46). 5. The combined rotary drilling tool according to claim 1, characterized in that the axis of the outer drilling tool (2), the axis of the inner drilling tool (3) and the axis of the hydraulic cylinder (4) are on a straight line. 6 . The combined rotary drilling tool according to claim 1 , characterized in that, the wall of the inner drilling tool ( 3 ) is straight, and the inner drilling tool ( 3 ) is a single-head auger drilling tool. 7. The combined rotary drilling tool according to claim 4, characterized in that, The connecting square head fixing seat (11) is provided with a first pin hole (15) and a second pin hole for connecting external equipment; The first fixed seat (42) is provided with a third pin hole (41), and the first pin shaft passes through the first pin hole (15) and the third pin hole (41) to connect the first fixed seat (42) with the connecting side. The head holder (11) is connected; The second fixed seat (46) is provided with the fourth pin hole, the third fixed seat (31) is provided with the fifth pin hole (35), and the second pin shaft passes through the fourth pin hole and the fifth pin hole (35). ) The second fixed seat (46) is connected with the third fixed seat (31). 8. The combined rotary drilling tool according to claim 4, characterized in that, the upper end of the third fixing seat (31) is provided with a groove, and the second fixing seat (46) is embedded in the groove. 9. The combined rotary drilling tool according to claim 4, characterized in that, The quantity of rib plate (14) is 4 pieces; The quantity of outer drill teeth (22) is 12. 10. The combined rotary drilling tool according to claim 1, characterized in that the hydraulic cylinder (4) is a telescopic cylinder.