阅读说明：本技术 一种连续墙潜孔锤钻具 (Continuous wall down-the-hole hammer drilling tool ) 是由 龚秀刚 王汉宝 邓彬 于 2019-12-20 设计创作，主要内容包括：一种地下连续墙潜孔锤钻具,包括连接座、二个扩展架、扩展油缸、二个连杆、位于扩展架内腔的多个冲击器、冲击器销轴和减振垫,连接座下端部枢轴安装二个摆杆,内腔固装扩展油缸；扩展油缸下端安装二个连杆,二个连杆的另一端分别安装在二个扩展架的耳座上；扩展油缸作伸缩动作,带动二个连杆和二个扩展架向外扩展和向内收缩；冲击器置于扩展架的架体内腔的各个安装通孔后后在其前后方向呈一排排列方式设置,其钻掘头对地层脉冲振动、冲击碎岩和钻掘入岩,形成矩形地下连续墙槽体。本发明除适用一般软土地层钻掘外,还适合卵石、漂石地层和基岩等坚硬地质钻掘施工,具有垂直度好,成槽精度高等特点,有效提高施工效率,降低施工成本。(A kind of underground continuous wall down-the-hole hammer drilling tool, including connecting seat, two expansion frames, expansion cylinder, two tie rods, locate in expanding a plurality of impactors of the cavity of frame, impacter pin shaft and damping pad, the pivot of lower end of connecting seat installs two oscillating bars, the cavity is fixed to install the expansion cylinder; the lower end of the expansion oil cylinder is provided with two connecting rods, and the other ends of the two connecting rods are respectively arranged on lug seats of the two expansion brackets; the expansion oil cylinder makes telescopic action to drive the two connecting rods and the two expansion brackets to expand outwards and contract inwards; the impactors are arranged in a row in the front-back direction after being arranged in the mounting through holes of the inner cavity of the frame body of the expansion frame, and the drilling heads of the impactors perform pulse vibration on the stratum, impact broken rocks and drill into the rocks to form a rectangular underground continuous wall groove body. The invention is suitable for drilling and digging in soft soil stratum, cobble, boulder stratum, bedrock and other hard geology, and has the features of high verticality, high grooving precision, high construction efficiency, low construction cost, etc.)

1. The utility model provides an underground continuous wall down-the-hole hammer drilling tool, includes connecting seat (2), two extension framves (3), extension hydro-cylinder (4), two connecting rods (5), is located a plurality of impactors (6), impacter round pin axle (7) and damping pad (8) of extension frame inner chamber, wherein:

the expansion frame (3) comprises a frame body (30), a plurality of mounting holes (31) positioned in the inner cavity of the frame body, an ear seat (33), an upper end notch (34), a plurality of pairs of long grooves (35) communicated with the mounting holes and a plurality of through holes (36);

the impactor (6) comprises an impactor body (60), an upper end lifting lug (61), a drilling head (62) and an air inlet (63);

the method is characterized in that:

the connecting seat (2) is a hollow frame structure, the upper end of the connecting seat is fixedly provided with an external drill rod assembly, and the lower end corners of the connecting seat are pivotally provided with two expansion brackets (3);

the expansion oil cylinder (4) is positioned in the inner cavity of the connecting seat (2), the upper end of the expansion oil cylinder is pivotally arranged at the top of the inner cavity of the connecting seat (2), the lower end of the expansion oil cylinder is hinged with two connecting rods (5), and the other ends of the two connecting rods (5) are respectively hinged on the inner side ear seats (33) of the left expansion frame and the right expansion frame (3); the expansion oil cylinder (4) drives the two connecting rods (5) and the two expansion frames (3) to expand outwards and contract inwards when performing telescopic motion under the operation of an external hydraulic system;

the expansion frame (3) is of a frame structure, and is respectively inserted into corners of the lower end part of the connecting seat (2) through notches (34) at the upper ends of the expansion frame and then is hinged and installed at the left side and the right side of the connecting seat through pin shafts; the mounting holes (31) are arranged in parallel and at equal intervals along the front-back direction of an inner cavity of the frame body (30) of the expansion frame (3), and each pair of long grooves (35) are respectively positioned on the outer side surface of the frame body (30) of the expansion frame (3) and are communicated with the upper end of each mounting hole (31); each through hole (36) is positioned below each pair of long grooves (35);

the impactors (6) are respectively arranged in a row in the front-back direction of the impactors through installing holes (31) of the inner cavities of the frame bodies (30) of the left and right expansion frames (3) after the impactors (60) are arranged in the front-back direction, and the lower ends of the impactors are fixedly provided with drilling heads (62) and protrude out of the bottom planes of the frame bodies (30) of the left and right expansion frames (3); each impactor (6) penetrates through a lifting lug (61) at the upper end of the impactor through an impactor pin shaft (7) and then is respectively arranged in each pair of long grooves (311) on the outer side surfaces of the frame bodies (30) of the left expansion frame and the right expansion frame (3); the vibration damping pads (8) are arranged in the mounting holes (31) of the inner cavities of the frame bodies (30) of the left and right expansion frames (3) and are positioned at the top end of each impactor (6); the air inlets (63) of the impactors (6) are connected with an external air injection pipe, penetrate through the through holes (36) on the outer side surfaces of the frame bodies (30) of the left expansion frame and the right expansion frame (3) and then are communicated with an external compressed air pumping system; therefore, each impactor (6) can simultaneously impact downwards along the hole walls of the mounting holes (31) in the inner cavities of the frame bodies (30) of the left expansion frame and the right expansion frame (3) by the action of compressed air to do work, and the drilling head (61) at the lower end of the impactor is pushed to perform pulse vibration on the stratum, impact crushed rocks and drill into rocks.

2. An underground continuous wall down-the-hole hammer drill according to claim 1, characterized in that the positional deviation of each pair of elongated slots (35) on the outer side of the frame body (30) of the expansion frame (3) with respect to the axial center of each corresponding mounting hole (31) is less than or equal to 0.15 mm.

3. An underground continuous wall down-the-hole hammer drill according to claim 1, characterized in that the two connecting rods (5) are arranged in two groups, two groups in total, and are respectively installed at both sides of the cylinder tube fork at the lower end of the extension cylinder (4).

Technical Field

The invention relates to the technical field of drilling and construction machinery equipment, in particular to a continuous wall down-the-hole hammer drilling tool.

Background

The pneumatic down-the-hole hammer drilling technology has the characteristic of high-efficiency rock breaking, and is widely applied to the fields of oil-gas exploration, metal mine exploration, foundation pile foundation drilling, rock-entering pile foundation construction and the like at present. The down-the-hole hammer is an impact tool taking compressed air as power, impact power is directly transmitted to a drill bit to perform pulsating crushing on rocks, crushed rock debris is discharged by utilizing the compressed air discharged by the down-the-hole hammer, and the purpose of drilling and hole cleaning through hole bottom impact rotary drilling is achieved. The compressed air can cool the drill bit and blow the broken rock debris away from the hole bottom and discharge the rock debris out of the hole opening, so that the purpose of quickly breaking rock is achieved. The down-the-hole hammer is particularly suitable for rock stratum broken stone drilling, has high working efficiency and low cost, but has the defects of high cost and low efficiency in a soil layer.

Disclosure of Invention

The invention mainly aims to overcome the defects in the prior art, and provides a continuous wall down-the-hole hammer drilling tool which effectively combines the technical characteristics of down-the-hole hammers, utilizes an oil cylinder to push a left swing rod and a right swing rod to expand, carries out impact and gravel crushing on a rock stratum under the pneumatic impact of each down-the-hole hammer, finally forms a rectangular continuous wall long groove, discharges crushed rock debris by compressed air, realizes the purpose of carrying out impact rotary drilling and hole cleaning at the bottom of the continuous wall groove, effectively improves the construction operation efficiency, reduces the construction cost, and is suitable for drilling and digging construction under hard geological conditions such as pebbles, boulder strata, bedrocks and the like.

In order to achieve the above purpose, the solution adopted by the invention is as follows:

the utility model provides an underground continuous wall down-the-hole hammer drilling tool, includes connecting seat, two extension framves, extension hydro-cylinder, two connecting rods, is located a plurality of impactors, impacter round pin axle and the damping pad of extension frame inner chamber, wherein:

the two expansion frames comprise frame bodies, a plurality of mounting holes positioned in the inner cavity of the frame bodies, lug seats, upper end notches, a plurality of pairs of long grooves communicated with the mounting holes and a plurality of through holes;

the impactor comprises an impactor body, an upper end lifting lug, a drilling head and an air inlet;

the method is characterized in that:

the connecting seat is a hollow frame structure body, the upper end of the connecting seat is fixedly provided with an external drill rod assembly, and two expansion brackets are pivotally arranged at the corners of the lower end of the connecting seat;

the expansion oil cylinder is positioned in the inner cavity of the connecting seat, the upper end of the expansion oil cylinder is pivotally arranged at the top of the inner cavity of the connecting seat, the lower end of the expansion oil cylinder is hinged with two connecting rods, and the other ends of the two connecting rods are respectively hinged on the inner side lug seats of the left expansion frame and the right expansion frame; the expansion oil cylinder drives the two connecting rods and the two expansion frames to expand outwards and contract inwards when performing telescopic motion under the operation of an external hydraulic system;

the expansion frame is of a frame structure, and the swing rod is respectively inserted into corners of the lower end part of the connecting seat through notches at the upper end of the swing rod and then is hinged and installed on the left side and the right side of the connecting seat through pin shafts; the mounting holes are arranged in parallel and at equal intervals along the front and back directions of the inner cavity of the frame body of the expansion frame, and each pair of long grooves are respectively positioned on the outer side surface of the frame body of the expansion frame and are communicated with the upper end of each mounting hole; each through hole is positioned below each pair of long grooves;

the impactors are respectively arranged in the mounting holes of the frame body inner cavities of the left and right expansion frames through the impactors, and are arranged in a row in the front-back direction, and the lower ends of the impactors are fixedly provided with drilling heads and protrude out of the bottom planes of the frame bodies of the left and right expansion frames; each impactor is respectively arranged in each pair of long grooves on the outer side surfaces of the frame bodies of the left expansion frame and the right expansion frame after penetrating through the lifting lugs at the upper ends of the impacter through impactor pin shafts; the vibration damping pad is arranged in each mounting hole of the frame body inner cavities of the left expansion frame and the right expansion frame and is positioned at the top end of each impactor; the air inlets of the impactors are connected with an external air injection pipe, penetrate through holes on the outer side surfaces of the frame bodies of the left expansion frame and the right expansion frame and then are communicated with an external compressed air pumping system; thus, each impactor can do work by impacting downwards along the hole walls of the mounting holes of the inner cavities of the left expansion frame and the right expansion frame under the action of compressed air, and a drilling head at the lower end of each impactor is pushed to perform pulse vibration on the stratum, impact rock breaking and drill into rock.

The invention can ensure that the position degree deviation of each pair of long grooves on the outer side surface of the frame body of the expansion frame relative to the axial center of each corresponding mounting hole is less than or equal to 0.15 mm.

The invention can also be that the two connecting rods can be arranged in an arrangement mode of two connecting rods per group and two connecting rods in total, and the two connecting rods are respectively arranged at two sides of the cylinder barrel connecting fork at the lower end of the expansion oil cylinder.

Drawings

FIG. 1 is a schematic view of the structure of a down-the-hole hammer drill of the underground diaphragm wall of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

FIG. 5 is a sectional view taken along line B-B of FIG. 2;

fig. 6 is a bottom view of fig. 2.

Detailed Description

According to the drawings of fig. 1-6, a down-the-hole hammer drill for underground continuous walls comprises a connecting seat 2, two expansion brackets 3, an expansion oil cylinder 4, two connecting rods 5, a plurality of impactors 6 positioned in the inner cavities of the expansion brackets, an impacter pin shaft 7 and a damping pad 8; the expansion frame 3 comprises a frame body 30, a plurality of mounting holes 31 positioned in the inner cavity of the frame body, lug seats 33, an upper end notch 34, a plurality of pairs of long grooves 35 communicated with the mounting holes and a plurality of through holes 36; the impactor 6 comprises an impactor body 60, an upper end lug 61, a drilling head 62 and an air inlet 63; wherein:

the connecting seat 2 is a hollow frame structure, the upper end of the connecting seat is fixedly provided with an external drill rod assembly, and the corner of the lower end of the connecting seat is pivotally provided with two swing rods 3.

The expansion oil cylinder 4 is positioned in the inner cavity of the connecting seat 2, the upper end of the expansion oil cylinder is pivotally arranged at the top of the inner cavity of the connecting seat 2, the lower end of the expansion oil cylinder is hinged with two connecting rods 5, and the other ends of the two connecting rods 5 are respectively hinged on the inner side ear seats 33 of the left expansion frame 3 and the right expansion frame 3; the expansion oil cylinder 4 drives the two connecting rods 5 and the two expansion frames 3 to expand outwards and contract inwards when performing telescopic motion under the operation of an external hydraulic system. The two connecting rods 5 can be arranged in a mode of two connecting rods per group and two connecting rods in total, and the two connecting rods are respectively arranged at two sides of a cylinder barrel connecting fork at the lower end of the extension oil cylinder 4. The expansion oil cylinder has the advantages that the piston of the expansion oil cylinder can stably transmit the acting force of the oil cylinder when stretching, the working reliability of the expansion oil cylinder and the connecting rod of the expansion oil cylinder is improved, and the service lives of the expansion oil cylinder and the expansion frame are effectively prolonged.

The expansion frame 3 is of a frame structure, and is respectively inserted into corners of the lower end part of the connecting seat 2 through notches 34 at the upper end of the expansion frame and then is hinged and installed at the left side and the right side of the connecting seat through pin shafts; the mounting holes 31 are arranged in parallel and equidistantly along the front and back direction of the expansion frame 3, and each pair of long slots 35 are respectively positioned on the outer side surface of the frame body 30 of the expansion frame 3 and are communicated with the upper end of each mounting hole 31; each through hole 36 is located below each pair of elongated slots 35. The deviation of the position degree of each pair of long grooves 35 on the outer side surface of the frame body 30 of the expansion frame 3 relative to the axial center of each corresponding mounting hole 31 is less than or equal to 0.15 mm. Therefore, the working stability and reliability of each impactor during impacting and doing work in the mounting hole of the expansion frame are effectively guaranteed, the impactor is prevented from generating large radial rotation, the drilling head is convenient to impact and break rock, and the service life is prolonged.

The impactors 6 are respectively arranged in a row in the front-back direction after being respectively arranged in the mounting holes 31 of the inner cavities of the frame bodies 30 of the left and right expansion frames 3 through impactors bodies 60, and drilling heads 62 at the lower ends of the impactors are protruded out of the bottom end planes of the left and right swing rods 3; each impactor 6 penetrates through the lifting lugs 61 at the upper ends of the impacter pins 7 and then is respectively arranged in each pair of long grooves 311 on the outer side surfaces of the left swing rod 3 and the right swing rod 3; the vibration damping pad 8 is arranged in each mounting hole 31 of the inner cavities of the frame bodies 30 of the left expansion frame 3 and the right expansion frame 3 and is positioned at the top end of each impactor 6; the air inlets 63 of the impactors 6 are connected with an external air injection pipe, penetrate through the through holes 36 on the outer side surfaces of the frame bodies 30 of the left expansion frame 3 and the right expansion frame 3 and are communicated with an external compressed air pumping system; thus, each impactor 6 can impact and do work downwards along the hole walls of the mounting holes 31 in the frame bodies 30 of the left and right expansion frames 3 under the action of compressed air, and push the drilling head 61 at the lower end of the impactor to vibrate the stratum in a pulse mode, impact broken rocks and drill into rocks. And finally drilling to finish the rectangular continuous wall long groove in the process of transversely moving the underground continuous wall down-the-hole hammer and vertically drilling the tool, and discharging rock debris out of the continuous wall long groove by externally connected compressed air.

The underground continuous wall down-the-hole hammer drilling tool is combined with the technical characteristics of down-the-hole hammers, a plurality of impactors are connected in parallel to form a left drilling unit and a right drilling unit, a left connecting rod and a right connecting rod are pushed by an expansion oil cylinder to expand, rock strata are impacted and crushed under the pneumatic impact of each down-the-hole hammer, the purpose of rapidly crushing rock is achieved, and rectangular continuous wall long grooves are formed finally; meanwhile, the crushed rock debris can be discharged by pumping compressed air through each impactor, and the purpose of cleaning holes by impact rotary drilling at the bottom of the continuous wall groove is achieved. The underground continuous wall down-the-hole hammer drilling tool is suitable for drilling and digging into rock under hard geological conditions such as sand gravel, pebble, boulder stratum, bedrock and the like besides common soft soil layer, has the characteristics of good verticality, high grooving precision, strong rock breaking capacity and the like, greatly improves the construction operation efficiency, effectively reduces the construction cost and reduces the construction period.