CN212003035U

CN212003035U - Radial drive telescopic arm non-forming cutting digging drilling tool

Info

Publication number: CN212003035U
Application number: CN202020237973.8U
Authority: CN
Inventors: 闻志君
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2020-11-24
Anticipated expiration: 2030-03-02

Abstract

The utility model discloses a radial driving telescopic arm non-forming cutting digging drilling tool, a box type telescopic arm cutting unit can be selectively arranged in a radial hole arranged on the outer side of a mounting seat to adapt to the power and geological conditions of the drilling machine, the digging expansion ratio can meet the requirement of 3 times of expansion ratio of JGJ/T225-2010 large-diameter bottom-expanded cast-in-place pile technical specification and DL/T5219-2014 overhead transmission line basic design technical specification, the movement direction of the cutting tool is consistent with the movement direction of the driving oil cylinder, the cutting tool is perpendicular to the hole wall, the axial dimension is small, non-forming cutting forming is adopted, the cutting resistance is small, the torsion resistance of the box-shaped arm in the stress direction is strong, the multi-hole type drilling machine can flexibly dig various hole types, the working effectiveness and the reliability of the drilling machine and a drilling tool are improved, and the displacement sensor arranged in the cutting unit can measure the radial footage of the reaming hole in real time, so that the quality of the reaming hole is guaranteed.

Description

Radial drive telescopic arm non-forming cutting digging drilling tool

Technical Field

The utility model relates to a stake hole cutting drilling tool, especially a draw and dig drilling tool.

Background

The existing digging drilling tool is a forming cutter with an umbrella-shaped wing-shaped structure, and has two modes of a mechanical driving mode and a hydraulic driving mode according to the difference of power driving modes, the digging and reaming adopt the mode that the expansion wings are gradually expanded and form the enlarged holes at one time.

In order to promote and draw and dig the stake, save pile foundation construction cost, engineering technical personnel continue to draw and dig the drilling tool to improve to the existing, for example, chinese invention patent with publication number CN 104453720A discloses "two segmentation dig and expand the end drill bit soon", and it expands respectively through setting up upper portion extension tool bit (the utility model discloses call expansion wing) and lower part extension tool bit, through upper and lower two steps rotatory extension cutting, accomplishes the construction of enlarged footing, can accomplish the cutting with less moment.

The existing hole expanding drilling tool is an umbrella-shaped wing-shaped forming cutter hole expanding in nature, and the main difference between different types of digging drilling tools lies in the connection position, the connection mode and the driving mode of an expanding wing and a drilling tool main body. Because the reaming cutter mainly bears the torsional force of a drilling tool and the counter force of the cut hole wall in the reaming process, the section of the formed expanding wing is large when viewed from the longitudinal direction; due to the structural arrangement relationship, the hole drilling tool can only be manufactured in a single thin mode when viewed from a cross section, the large longitudinal section forming structure inevitably needs large torque when the hole wall is cut in a rotating mode, when non-uniform geology such as boulder exists on the hole wall, stress of the expanding wings on the cutting surface is inevitably uneven, the cross section is structurally thin in the direction of bearing the cutting torque, and finally the torque is only borne by the connecting pin shaft of the expanding wings and the drilling tool body, the structural mode determines that the hole drilling tool is easy to damage, and hole expanding capacity and efficiency are limited.

In addition, the existing hole expanding drilling tool is an airfoil-shaped forming cutter driven by an axially-arranged oil cylinder, the slope of the side face of the expanded bottom is required by JGJ/T225-2010 large-diameter expanded-bottom cast-in-place pile technical specification and DL/T5219-2014 overhead transmission line basic design technical specification, and the slope is not more than 1/4 for sandy soil; the content of silt and cohesive soil is not more than 1/3; the pebble bed and weathered rock are not larger than 1/2; because the hypotenuse of the right triangle is the longest, the expansion wing for forming and cutting is the hypotenuse, and the drilling tool needs to be folded when entering and exiting the pile hole, in order to achieve a certain expanding ratio, the drilling tool with large axial length is inevitably needed, so that the drilling tool mechanism is heavy, the manufacturing cost is high, the matched drilling machine is large, and the construction cost is high. Even in this case, the "two-stage rotary excavating and bottom expanding drill bit" in the chinese patent publication No. CN 104453720A is only set to have a maximum expansion ratio of 2.2 times, a bottom expanding area of 4.84 times of the cross-sectional area of the pile body, and has a certain difference from the requirements of the above regulations "the maximum diameter of the expanded end is 3 times of the diameter of the pile body", and the bottom expanding area is 9 times of the cross-sectional area of the pile body.

In addition, the existing digging and reaming drilling tool belongs to the reaming of a forming cutter, and can only form a fixed-shape enlarged hole, but cannot form a bearing pile hole with a complex shape.

Disclosure of Invention

The method aims to overcome the defects that the digging and reaming drilling tool in the prior art has large resistance, low strength, easy damage, large length-diameter ratio, no requirement of the diameter-diameter ratio on industrial regulations, no digging of complex hole patterns and the like. The utility model provides a drilling tool is drawn in the non-shaping cutting of radial drive telescopic boom utilizes the cutting tool of the flexible arm front end of radially arranged box, draws and digs the reaming.

The utility model provides a technical scheme that its technical problem adopted is: a radial drive telescopic arm non-forming cutting digging drilling tool comprises a cutting unit, a mounting seat and a slag receiving barrel; the cutting unit comprises a fixed arm, a telescopic arm, a front end supporting slide block, a tail end supporting slide block, a cutting tool, an actuator and a displacement sensor; the fixed arm is installed at the mount pad radial hole, the moving member and the mounting of actuator are connected with flexible arm and fixed arm respectively, front end supporting slide is installed to fixed arm front end medial surface, tail end supporting slide is installed to flexible arm tail end lateral surface, the cutting sword is installed to the front end terminal surface of flexible arm, front end supporting slide and flexible arm lateral surface clearance fit, tail end supporting slide and fixed arm medial surface clearance fit, when the actuator stretches out, radially promote flexible arm and front end cutting sword and cut into the pore wall, when the actuator retracts, radially pull back flexible arm and front end cutting sword, install displacement sensor in the cutting unit and measure flexible arm and fixed arm relative displacement promptly reaming radial footage volume.

The radial-drive telescopic arm non-forming cutting digging drilling tool comprises a mounting seat, a base body and a male connecting seat, wherein the female connecting seat and the male connecting seat are respectively mounted at the central positions of the upper end surface and the lower end surface of the base body, an axial bucket opening hole is formed in the base body, and a cutting unit mounting hole is formed in the outer side surface of the base body.

The radial driving telescopic arm non-forming cutting digging drilling tool is characterized in that the female connecting seat of the slag receiving barrel is connected with the male connecting seat of the mounting seat, and the upper end of the bucket opening mechanism of the slag receiving barrel is located in the axial bucket opening hole of the mounting seat.

According to the radial-drive telescopic-arm non-forming cutting excavation drilling tool, the cutting unit adopts a single-stage cutting unit or a two-stage cutting unit or a three-stage cutting unit so as to match different aperture sizes and reaming requirements.

Foretell flexible arm non-shaping cutting of radial drive is drawn and is dug drilling tool, the two-stage cutting unit the flexible arm of tertiary cutting unit divide into the two-stage, is the flexible arm of one-level and the flexible arm of second grade respectively, and the stopper is installed to the flexible arm of one-level, the flexible arm lateral surface of second grade, and the flexible arm 11 of one-level separates with the flexible arm 12 of second grade when preventing to stretch out, and the front end lateral surface of the flexible arm of second grade is provided with the flange.

The drilling tool is excavated in non-shaping cutting of foretell radial drive telescopic boom, the actuator adopts single-stage double-acting actuator or two-stage double-acting actuator or three-stage double-acting actuator, and its drive mode can be hydraulic pressure or electricity or machinery.

According to the radial drive telescopic arm non-forming cutting digging drilling tool, the displacement sensor is a magnetostrictive displacement sensor or a stay wire displacement sensor or an ultrasonic displacement sensor.

The drilling tool is excavated in non-shaping cutting of foretell radial drive telescopic boom, connect the sediment bucket surface and evenly arrange a plurality of groups wear resistant strip, connect in the sediment bucket with be equipped with the limbers in the mount pad, have and reduce the lifting force, stabilize the pore wall effect.

Foretell flexible arm non-shaping cutting of radial drive is drawn and is dug the drilling tool, it installs the couple to open fill mechanism, the hangers has been arranged to the end door, promotes open fill mechanism can open the end door realizes unloading the native function.

The utility model has the advantages that:

1. the utility model discloses draw and dig reaming drilling tool and solved umbelliform wing section shaping structure reaming drilling tool, when exhibition wing shaping reaming, the one-time cutting area that faces is big, the resistance is big, the wing section structure is single and fragile structure contradiction, through setting up box cutting unit assembly, strengthen the torsional strength of cutting arm, adopt non-shaping cutting, when reaming, the successive layer enlarges stake hole diameter, substep cutting shaping enlarged footing, greatly reduced the atress and the required power of reaming in-process drilling tool, and simple structure, the atress is reasonable, improve the reliability of machines.

2. The utility model discloses draw and dig the multistage flexible cutting unit that the reaming drilling tool adopted radial arrangement, cutting unit intensity is high, and a cutting plane is little, the resistance is little, and cutting ability is good, expandes the arm length, can cut the hole of bigger bore ratio.

3. The utility model discloses draw and dig reamer drilling tool and adopt the multistage flexible cutting unit of radial arrangement, its extending direction is unanimous with the pore-forming direction, does not need axial unnecessary action and mechanism, and the axial dimension of drilling tool very reduces, and the structure is simplified, light in weight.

4. The utility model discloses draw and dig reaming drilling tool is provided with displacement sensor in the cutting unit, can detect at any time and draw and dig reaming size.

5. The utility model discloses draw and dig reaming drilling tool and adopt non-shaping cutting, once cut plane is little, the resistance is little, and cutting ability is good, can draw and dig more complicated pass.

6. The utility model discloses drawing and digging reaming drilling tool adopts non-shaping cutting, and one-time cutting plane is little, and box cutting unit intensity is high, when meetting the secret and floating the stone, more can draw earlier and dig the upper and lower side soil layer that floats the stone, then uses the cutting unit as the pinch bar, will float the stone sled down to there is better geological adaptability.

7. The utility model discloses drawing and digging the reaming drilling tool, dispose and connect the sediment fill, the reaming is collected soil simultaneously, prevents to draw in a large number and digs out the dregs and fall into the hole bottom, need not change the drill bit and get the sediment, improves the efficiency of construction.

8. The utility model discloses draw and dig reaming drilling tool connects the outer disc of sediment fill to have arranged wear resistant strip, connects to arrange the limbers in sediment fill and the mount pad, can stabilize the pore wall, reduces required lifting force.

9. The utility model discloses draw and dig the reaming drilling tool, the mount pad can many superposes from top to bottom and connect, can match according to the drilling tool moment of torsion and select installation multiunit cutting unit, cuts the longer pore wall simultaneously to full play rig power gains better efficiency of construction.

10. The utility model discloses draw and dig the reaming drilling tool, the cutting unit mounting hole has been arranged to the mount pad lateral surface axial, can match according to the drilling tool moment of torsion and select installation multiunit cutting unit, through the flexible volume of control hydro-cylinder, makes cutting tool outside envelope and required drawing dig hole profile cutting to full play rig power gains better efficiency of construction.

11. The utility model discloses draw and dig reaming drilling tool, the volume is littleer when drawing in, and weight is lighter, and it is all more convenient to transport the change.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is an explosion diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a fully-extended top view of the present invention.

Fig. 4 is a top view of the present invention fully retracted.

Fig. 5 is a cross-sectional view of the single stage cutting unit of the present invention.

Fig. 6 is a cross-sectional view of the two-stage cutting unit of the present invention.

Fig. 7 is a sectional view of the third-stage cutting unit of the present invention.

In the figure: 1. the device comprises a mounting base, a female connecting base, a base body, a water through hole, a hopper opening hole, a male connecting base, a cutting unit, a fixed arm, a telescopic arm, a flange, a first-stage telescopic arm, a second-stage telescopic arm, a front-end supporting sliding block, a tail-end supporting sliding block, a limiting block, a cutting tool, a sliding device, a single-stage double-acting actuator, a second-stage double-acting actuator, a third-stage double-acting actuator, a displacement sensor, a slag receiving barrel, a barrel body, a wear-resisting strip, a hopper opening mechanism, a bottom door, a single-stage cutting unit, a second-stage cutting unit, a third-stage cutting unit and a magnetostrictive displacement sensor, wherein the mounting.

Detailed Description

[ example 1 ]

A radial driving telescopic arm non-forming cutting digging drilling tool comprises a single-stage cutting unit 27, a mounting seat 1 and a slag receiving barrel 22. The single-stage cutting unit 27 comprises a fixed arm 8, a telescopic arm 9, a front end supporting slide block 13, a tail end supporting slide block 14, a limiting block 15, a cutting tool 16, a single-stage double-acting actuator 18 and a magnetostrictive displacement sensor 30; the fixed arm 8 is arranged in a radial hole of the mounting seat 1, the piston rod end and the cylinder bottom end of the single-stage double-acting actuator 18 are respectively connected with the telescopic arm 9 and the fixed arm 8, the front end inner side surface of the front end of the fixed arm 8 is provided with a front end supporting slide block 13, the tail end outer side surface of the telescopic arm 9 is provided with a tail end supporting slide block 14, the front end surface of the telescopic arm 9 is provided with a cutting tool 16, the front end supporting slide block 13 is in clearance fit with the outer side surface of the telescopic arm 9, the tail end supporting slide block 14 is in clearance fit, the telescopic arm 9 and the cutting tool 16 at the front end thereof are pushed to cut into the hole wall in the radial direction, when the single-stage double-acting actuator 18 retracts, the telescopic arm 9 and the front end cutting tool 16 thereof are radially pulled back, and a magnetostrictive displacement sensor 30 is arranged in the single-stage double-acting actuator 18 to measure the relative displacement of the telescopic arm 9 and the fixed arm 8, namely the reaming radial footage.

The mounting seat 1 comprises a female connecting seat 2, a seat body 3 and a male connecting seat 6, wherein the female connecting seat 2 and the male connecting seat 6 are respectively mounted at the central positions of the upper end surface and the lower end surface of the seat body 3, an axial hopper opening hole 5 is formed in the seat body 3, and a mounting hole for a cutting unit 7 is formed in the outer side surface of the seat body.

The slag receiving barrel 22 comprises a female coupling seat 2, a barrel body 23, a wear-resistant strip 24, a bottom door 26 and a bucket opening mechanism 27, wherein the female coupling seat 2 is arranged at the center of the upper end face of the barrel body 23.

The female connecting seat 2 of the slag receiving barrel 22 is connected with the male connecting seat 6 of the mounting seat 1, and the upper end of the bucket opening mechanism 27 of the slag receiving barrel 22 is positioned in the axial bucket opening hole 5 of the mounting seat 1.

The outer surface of the slag receiving barrel 22 is uniformly provided with a plurality of groups of wear-resistant strips 24, and the wear-resistant strips have the functions of wear resistance, centralization and hole wall stabilization. The water through holes 4 are arranged in the mounting seat 1 and the slag receiving barrel 22, so that the lifting force is reduced, and the hole wall is stabilized.

The bucket opening mechanism 25 is provided with a hook, the bottom door 26 is provided with a lug, and the pushing of the bucket opening mechanism 25 can open the bottom door 26 to realize the soil unloading function.

[ example 2 ]

The cutting unit 7 can also be a two-stage cutting unit 28, which can overcome the defect that the radial driving telescopic arm of the single-stage cutting unit 27 cannot meet the regulation requirement of 3 times of the expanding ratio due to the deduction of the structure size of the ineffective stroke of the actuator 17. The telescopic arm 9 of the two-stage cutting unit 28 is divided into two stages, namely a first-stage telescopic arm 11 and a second-stage telescopic arm 12, and is driven by a two-stage double-acting actuator 19, the piston rod end and the cylinder bottom end of the two-stage double-acting actuator 19 are respectively connected with the second-stage telescopic arm 12 and a fixed arm 8, the front end inner side surface of the front end of the fixed arm 8 is provided with a front end supporting slide block 13, the tail end outer side surface of the first-stage telescopic arm 11 is provided with a front end supporting slide block 14, the tail end outer side surface of the second-stage telescopic arm 12 is provided with a cutting edge tool 16, the front end outer side surface of the second-stage telescopic arm 12 is provided with a flange 10, the front end supporting slide block 13 of the fixed arm 8 is in clearance fit with the outer side surface of the first-stage telescopic arm 11, the front, the tail end supporting slide block 14 of the second-stage telescopic arm 12 is in clearance fit with the inner side face of the first-stage telescopic arm 11, when the two-stage double-acting actuator 19 extends out, the second-stage telescopic arm 12 and the front end cutting tool 16 of the second-stage telescopic arm are pushed radially to cut into a hole wall, when the two-stage double-acting actuator 19 retracts, the second-stage telescopic arm 12 and the front end cutting tool 16 of the second-stage telescopic arm are pulled back radially, a front end flange 10 of the second-stage telescopic arm 12 pushes the first-stage telescopic arm 11 back to the fixed arm 8, a limiting block 15 is arranged on the outer side face of the first-stage telescopic arm.

[ example 3 ]

The cutting unit 7 can also be a three-stage cutting unit 29, and can overcome the defect that the rule requirement of 3 times of the expanding ratio cannot be met after the structural size of the ineffective stroke of the actuator 17 is deducted due to the fact that a pile hole is too small and the radial driving telescopic arm of the two-stage cutting unit 28 is used for cutting and digging a drilling tool without forming. The three-stage cutting unit 29 telescopic arm 9 is divided into two stages, namely a first-stage telescopic arm 11 and a second-stage telescopic arm 12, and is driven by a three-stage double-acting actuator 20, the piston rod end and the cylinder bottom end of the three-stage double-acting actuator 20 are respectively connected with the second-stage telescopic arm 12 and a fixed arm 8, the front end inner side surface of the front end of the fixed arm 8 is provided with a front end supporting slide block 13, the tail end outer side surface of the first-stage telescopic arm 11 is provided with a front end supporting slide block 14, the tail end outer side surface of the second-stage telescopic arm 12 is provided with a cutting edge tool 16, the front end outer side surface of the second-stage telescopic arm 12 is provided with a flange 10, the front end supporting slide block 13 of the fixed arm 8 is in clearance fit with the outer side surface of the first-stage telescopic arm 11, the front end, the tail end supporting slide block 14 of the second-stage telescopic arm 12 is in clearance fit with the inner side face of the first-stage telescopic arm 11, when the third-stage double-acting actuator 20 extends out, the second-stage telescopic arm 12 and the front end cutting tool 16 thereof are radially pushed to cut into a hole wall, when the third-stage double-acting actuator 20 retracts, the second-stage telescopic arm 12 and the front end cutting tool 16 thereof are radially pulled back, the front end flange of the second-stage telescopic arm 12 pushes the first-stage telescopic arm 11 back to a fixed arm, a limiting block 15 is arranged on the outer side face of the first-stage telescopic arm 11 and the second-stage telescopic arm 12, and.

[ example 4 ]

The magnetostrictive displacement sensor 30 can also be a stay wire displacement sensor, the stay wire displacement sensor body is arranged in the fixed arm, the stay wire is arranged on the telescopic arm, the relative displacement of the telescopic arm and the fixed arm, namely the reaming radial footage amount, can be measured, and the magnetostrictive displacement sensor is not limited by the structural size of the actuator.

[ example 5 ]

The magnetostrictive displacement sensor 30 can also be an ultrasonic displacement sensor, and the ultrasonic displacement sensor is installed in the fixed arm to detect the position of the telescopic arm, so that the relative displacement of the telescopic arm and the fixed arm, namely the reaming radial footage amount, can be measured, and is not limited by the structural size of the actuator.

[ example 6 ]

A plurality of mount pads 1 are overlapped from top to bottom and are connected, according to the geology condition, a plurality of cutting units 7 of rig output torque condition matching installation in the cutting unit mounting hole, can once draw and dig more slot hole of cutting, improve the efficiency of construction.

The utility model discloses the during operation needs to install the female joint chair 2 of mount pad 1 on the drilling rod square head of rig earlier to oil piping connection on the rig is to actuator 17. After a drilling tool is placed into a hole-expanding pile hole to be preset, the drilling tool is driven by the drilling rod to rotate, a moving part of an actuator 17 extends out to drive a supporting sliding block 14 at the upper tail end of a telescopic arm 9 to slide outwards along a guide surface on the inner side of a fixed arm 8, meanwhile, a supporting sliding block 13 at the front end of the fixed arm 8 slides on the outer surface of the telescopic arm 9, and at the moment, a cutting tool 16 at the front end of the telescopic arm 9 rotates and cuts a hole wall to realize hole expansion; after the construction is finished, the moving part of the actuator 17 retracts to drive the telescopic arm 9 and the cutting tool 16 to retract while rotating, and the cut soil slag is swept into the slag receiving hopper 22; the drilling tool is lifted out of the pile hole by a drilling machine drill rod, the bucket opening mechanism 25 is pressed down by a drilling machine pressure plate, the bottom door 26 is opened, and the slag soil in the drilling tool is discharged. In the reaming construction process, the electric control equipment carries out real-time data detection on the movement speed and the stroke of the actuator 17 through the displacement sensor 21, so that accurate reaming of the diameter is realized, and the reaming precision is high.

Claims

1. The utility model provides a drilling tool is drawn in non-shaping cutting of radial drive telescopic boom, includes cutting unit (7), mount pad (1), connects sediment bucket (22), its characterized in that: the cutting unit (7) comprises a fixed arm (8), a telescopic arm (9), a front end supporting slide block (13), a tail end supporting slide block (14), a cutting tool (16), an actuator (17) and a displacement sensor (21), wherein the fixed arm (8) is installed in a radial hole of the installation seat (1), a moving part and a fixed part of the actuator (17) are respectively connected with the telescopic arm (9) and the fixed arm (8), the front end supporting slide block (13) is installed on the inner side surface of the front end of the fixed arm (8), the tail end supporting slide block (14) is installed on the outer side surface of the tail end of the telescopic arm (9), the cutting tool (16) is installed on the end surface of the front end of the telescopic arm (9), the front end supporting slide block (13) is in clearance fit with the outer side surface of the telescopic arm (; when the actuator (17) extends out, the telescopic arm (9) and the front end cutting tool (16) thereof are pushed radially to cut into the hole wall, when the actuator (17) retracts, the telescopic arm (9) and the front end cutting tool (16) thereof are pulled back radially, and a displacement sensor (21) is arranged in the cutting unit (7) and used for measuring the relative displacement of the telescopic arm (9) and the fixed arm (8), namely the reaming radial ruler-advancing amount.

2. The radial drive telescopic arm non-forming cutting excavation drilling tool as claimed in claim 1, wherein the mounting seat (1) comprises a female connecting seat (2), a seat body (3) and a male connecting seat (6), the female connecting seat (2) and the male connecting seat (6) are respectively mounted at the central positions of the upper end surface and the lower end surface of the seat body (3), an axial hopper opening hole (5) is formed in the seat body (3), and a cutting unit (7) mounting hole is arranged on the outer side surface.

3. The radial drive telescopic arm non-forming cutting excavation drilling tool according to claim 2, characterized in that the slag receiving barrel (22) comprises a female coupling seat (2), a barrel body (23), a wear-resistant strip (24), a bottom door (26) and a bucket opening mechanism (25), wherein the female coupling seat (2) is installed at the center position of the upper end face of the barrel body (23).

4. The radial drive telescopic arm non-forming cutting excavation drilling tool according to claim 3, characterized in that the female coupling seat (2) of the slag receiving barrel (22) is connected with the male coupling seat (6) of the mounting seat (1), and the upper end of the bucket opening mechanism (25) of the slag receiving barrel (22) is located in the axial bucket opening hole (5) of the mounting seat (1).

5. The radially driven telescoping arm non-contour cutting excavation drill of claim 1, characterized in that the cutting unit (7) employs a single stage cutting unit (27) or a two stage cutting unit (28) or a three stage cutting unit (29) to match different bore sizes and reaming requirements.

6. The radial drive telescopic arm non-forming cutting excavation drilling tool as claimed in claim 5, wherein the telescopic arms (9) of the two-stage cutting unit (28) and the three-stage cutting unit (29) are divided into two stages, namely a first-stage telescopic arm (11) and a second-stage telescopic arm (12), the outer side faces of the first-stage telescopic arm (11) and the second-stage telescopic arm (12) are provided with limiting blocks (15), and the outer side face of the front end of the second-stage telescopic arm (12) is provided with a flange.

7. A radial drive telescopic boom non-forming cutting and excavating drilling tool according to claim 5, characterized in that the actuator (17) is a single stage double acting actuator (18) or a two stage double acting actuator (19) or a three stage double acting actuator (20) driven hydraulically or electrically or mechanically.

8. The radially actuated telescoping arm non-contour cutting excavation drill of claim 1, wherein the displacement sensor (21) employs a magnetostrictive displacement sensor (30) or a pull wire displacement sensor or an ultrasonic displacement sensor.

9. The radial drive telescopic arm non-forming cutting excavation drilling tool as claimed in claim 3, characterized in that water through holes (4) are formed in the mounting base (1) and the slag receiving barrel (22), and a plurality of groups of wear-resistant strips (24) are uniformly arranged on the outer surface of the slag receiving barrel (22).

10. A radially driven telescopic arm non-forming cutting dredging drill according to claim 3, wherein the bucket opening mechanism (25) is provided with a hook, and the bottom door (26) is provided with a lug.