CN213234931U

CN213234931U - Crawler-type percussion drill

Info

Publication number: CN213234931U
Application number: CN202021939337.6U
Authority: CN
Inventors: 郭振伟; 郭武伟
Original assignee: Henan Guochang Construction Engineering Co ltd
Current assignee: Henan Guochang Construction Engineering Co ltd
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-05-18
Anticipated expiration: 2030-09-08

Abstract

A crawler-type percussion drill comprises a crawler chassis, a drill frame arranged on the crawler chassis, a pneumatic impactor and a pneumatic percussion drill bit, wherein two lifting mechanisms are respectively arranged at two opposite ends of the drill frame, lifting beams capable of lifting up and down are mounted on the lifting mechanisms, the lifting beams on the two lifting mechanisms are arranged in parallel to form a support frame for mounting a drill rod dismounting platform, the two drill rod dismounting platforms are respectively arranged at two sides of the lifting mechanisms and are connected with shaft sleeves sleeved on the lifting beams, the shaft sleeves can drive the drill rod dismounting platform to axially move and rotate relative to the lifting beams, and a power mechanism and a guide mechanism for driving a drill rod to punch are further arranged on the drill rod dismounting platform; the pneumatic percussion drill bit comprises an outer pipe, an inner pipe and a hard extrusion head. The utility model discloses drilling efficiency can be greatly improved to can be convenient for the activity of operating personnel on the rig.

Description

Crawler-type percussion drill

Technical Field

The utility model belongs to bore pore-forming equipment field, concretely relates to crawler-type percussion drill.

Background

The main forms of the current deep foundation pit support are as follows: the method comprises the following steps of soil nailing wall support, steel sheet pile support, cement soil wall support, row pile inner support, row pile soil layer anchor rod support and underground continuous wall support. The soil nailing wall support has the advantages of low manufacturing cost, quick construction, reliable performance and the like, and is widely applied.

Soil nailing Wall (Soil Nail Wall) is an in-situ Soil body reinforcement technology. The slope of the foundation pit is reinforced by soil nails made of steel bars, a steel bar mesh is laid on the surface of the slope, and a layer of concrete surface layer is sprayed on the surface of the slope to combine with the soil slope. The construction is a complex formed by firmly bonding a reinforced rod piece (namely a soil nail or an anchor rod) arranged in a slope body with the surrounding soil body, and a supporting structure similar to a gravity retaining wall formed by surface layers.

The soil nailing wall has various forms such as a drilling grouting type, a direct driving type and a driving grouting type. The drilling and grouting method comprises the steps of firstly drilling holes in a soil body by using mechanical equipment such as a drilling machine and the like, then placing a rod body (generally made of HRB335 ribbed steel bars) after the holes are formed, and then injecting cement slurry along the whole length. The drilling grouting type is almost suitable for various soil layers, has higher pulling resistance, more reliable quality and lower manufacturing cost, and is the most common soil nailing wall type.

The rig that is used for when soil nail wall construction pore-forming at present is small-size track rig, and the drilling rod drives the drill bit and creeps into on creeping into the operation platform and punches, creeps into the adjustment that the operation platform accomplished pitch angle under the effect of hydraulic pressure mechanism, because it is little to creep into the operation platform area, hardly provides sufficient operating space for operating personnel, also has great potential safety hazard moreover. In addition, most of the drill bits used in the prior drilling machines are pneumatic down-the-hole drill bits and drill bits with thread teeth.

The down-the-hole drill bit is generally suitable for rock strata, but is difficult to normally use for soil layers because the down-the-hole drill bit needs to be connected with a pneumatic impactor and can ensure the normal work of the pneumatic impactor only by keeping an air circuit smooth, and the front end of the down-the-hole drill bit is provided with an exhaust hole. In addition, the cost of down-the-hole drill bits is also high, which undoubtedly increases the construction cost.

For the drill bit with thread teeth, although the cost is low, when drilling, the drill bit needs to rotate to drill, the resistance is large, and further the drilling efficiency is low, for example, a single-head drilling machine adopting the drill bit has the drilling length of only 300m every day, and the requirement of a construction party is difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a crawler-type percussion drill, this percussion drill can greatly improve drilling efficiency to can be convenient for the activity of operating personnel on the rig.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a crawler-type impact drill comprises a crawler chassis and a drill frame arranged on the crawler chassis, wherein the drill frame is rotatably arranged on the crawler chassis through a slewing bearing so as to realize 360-degree rotation of the drill frame in a horizontal plane; the relative both ends of drill carriage respectively set up a lifting mechanism, install the lifting crossbeam that can the oscilaltion in the lifting mechanism, the lifting crossbeam parallel arrangement on two lifting mechanisms to constitute the support frame that is used for the installation to creep into the operation platform, creep into the operation platform with the cover is established on the lifting crossbeam and is connected, and the axle sleeve can drive and creeps into the operation platform for lifting crossbeam axial displacement and rotation, it is regional to be equipped with two drilling rod dismouting that are located the lifting mechanism both sides respectively on the operation platform to creep into, is equipped with drive drilling rod perforating power unit and guiding mechanism in drilling rod dismouting region.

The drilling frame and the crawler chassis are respectively provided with a pin hole, and the position of the drilling frame on the crawler chassis is locked through the matching of the pin shaft and the pin hole.

And the lifting beam is provided with a limiting ring positioned on the outer side of the shaft sleeve so as to prevent the drilling operation platform from being separated from the lifting beam.

The lifting mechanism is a hydraulic lifting frame.

The pneumatic percussion drill bit comprises an outer tube, an inner tube and a hard extrusion head, wherein the hard extrusion head is fixed at the front end of the outer tube, the inner tube is arranged in a tube cavity of the outer tube, the front end of the inner tube is closed, the rear end of the inner tube is fixed on the inner wall of the outer tube and is communicated with a gas circuit of the pneumatic percussion device through an opening at the tail of the outer tube, a plurality of vent holes are formed in the inner tube to communicate the tube cavity of the inner tube with the tube cavity of the outer tube, the outer tube is provided with a front cone part and a rear cone part, a diameter expanding part used for determining a drilling hole diameter is arranged between a large-diameter end of the front cone part and a large-diameter end of the rear cone part, and a plurality of exhaust slits are formed in the conical.

The length of the generatrix of the conical surface of the front cone part is larger than that of the generatrix of the conical surface of the rear cone part.

The length of the exhaust slit is not more than the length of a generatrix of the conical surface of the rear cone.

The expanding part is cylindrical or drum-shaped.

The front cone part, the diameter expanding part and the rear cone part are smoothly connected in sequence.

The front cone part, the diameter expanding part, the rear cone part and the tail part are integrally formed.

The utility model has the advantages of following innovation point: first, the utility model discloses the drill frame is wide big, both can satisfy two drilling rods and creep into, improves drilling efficiency, can provide safe, stable operation platform for operating personnel again. The drill frame is installed on the crawler chassis through the slewing bearing, and when the drill frame needs to be rotated, the drilling can be completed only by pushing the drill frame by a single person, so that a slewing driving mechanism does not need to be arranged, the structural complexity of the equipment can be reduced, and the occurrence of faults is reduced. When the two lifting mechanisms lift different heights respectively, the drilling operation platform can reach corresponding inclination degrees, so that the pitching angle of the drilling operation platform can be flexibly adjusted according to the drilling operation requirement, and the stability of the drill rod supporting platform in the adjusting process and the drilling operation can be better ensured by the two lifting mechanisms.

Second, the utility model discloses well drill bit's improvement has also further improved and has crept into efficiency. The outer tube of the pneumatic percussion drill bit of the utility model is streamline, the front end of the drill bit is a conical surface, so that no matter the rotary propulsion or the linear propulsion is adopted, the conical surface at the front end of the drill bit extrudes and creeps into the soil layer, thus the generated soil residue is less, and the exhaust hole can not be blocked; moreover, the exhaust hole of the utility model is arranged on the rear cone part which is also a conical surface, so that the backward exhaust can be realized, and when drilling, the rear part of the drill bit is positioned in the drilled hole after the hole is formed, so that the exhaust hole can be communicated with the outside through the hole opening, and the air passage of the impactor and the drill bit can be always kept smooth; still furthermore, the utility model discloses hole enlargement portion can paste tight pore wall, therefore even a small amount of dregs of earth that produce also can be sealed at the drill bit front end by the working part, and can not block up the exhaust hole at the drill bit rear end. Therefore, the problem that the down-the-hole drill bit is easy to block a gas circuit after being used for forming holes in a soil layer in the prior art can be solved. Furthermore, the utility model discloses an exhaust slit can effectively increase the exhaust area as the exhaust hole to after setting up the slit, the air velocity increase further ensures from the impacter to the drill bit to the unblocked of the gas circuit of drilling again. However, the performance is improved, the structure of the drill bit is simpler, the manufacturing cost is lower, and the cost performance is higher.

Third, the utility model discloses do not set up thread teeth etc. on pneumatic percussion bit's the outer tube, but the whole body is smooth, through the extrusion pore-forming to the soil body during pore-forming to when drill bit work portion adopted the cydariform, greatly reduced the frictional resistance between drill bit and the soil layer, consequently, compared in the drill bit that has thread teeth, the utility model discloses can improve drilling efficiency several times. According to contrast test, under the same condition of pore-forming diameter, a drill bit that has the thread tooth can bore 300 meters every day, and adopts the utility model discloses a behind the drill bit, can bore 1500 meters every day.

Fourth, the utility model discloses a pneumatic percussion drill bit is when using, still installs on traditional pneumatic impacter, consequently does not install and uses the threshold to this drill bit not only can be arranged in the soil layer (stereoplasm soil, weak soil) drilling, can also use at the sand ovum geology, and consequently the commonality is better.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a top view of the drilling rig and slewing bearing of the present invention;

FIG. 4 is a schematic view of the outer portion of the pneumatic percussion drill according to the present invention;

FIG. 5 is a schematic view of the interior of the pneumatic percussion drill according to the present invention;

the labels in the figure are: 1. the drilling equipment comprises a crawler chassis, 2, a drilling frame, 3, a hydraulic lifting frame, 4, a drilling operation platform, 5, a power head, 6, a lifting beam, 7, a shaft sleeve, 8, a drill rod, 9, a pneumatic percussion drill bit, 10, a guide ring, 11, a hydraulic operation table, 12, a slewing bearing, 13, a radiator, 14, a hydraulic tank, 15, a hydraulic power motor, 16 and a pin hole;

901. outer tube 902, inner tube 903, hard extrusion head 904, front cone 905, diameter expanding part 906, rear cone 907, tail 908 and exhaust slit.

Detailed Description

The following detailed description of the present invention is provided with reference to the accompanying drawings and examples, but not to be construed as limiting the present invention in any way.

Referring to the attached drawings, the crawler-type impact drilling machine comprises a crawler chassis 1, a drill frame 2 arranged on the crawler chassis 1, a pneumatic impactor and a pneumatic impact drill bit 9, wherein the crawler chassis 1 is of a conventional structure, different power can be selected according to needs, a hydraulic mechanism and a pneumatic mechanism are arranged on the crawler chassis 1, hydraulic oil and compressed air are provided for hydraulic equipment and pneumatic equipment on the drilling machine, and the hydraulic mechanism comprises a hydraulic tank 14, a hydraulic power motor 15, a hydraulic operating platform 11, a radiator 13 and the like. The pneumatic percussion mechanism is also a commercially available part, and therefore only the drill stand 2 and the pneumatic percussion drill bit 9 will be described in detail below.

The drilling frame 2 is provided with an underframe formed by welding profile steel, the center of the underframe is rotatably connected with the center of the upper surface of the crawler chassis 1 through a slewing bearing 12, pin holes 16 are formed in the drilling frame 2 and the crawler chassis 1, the drilling frame 2 is pushed by manpower to rotate to align the two pin holes 16, and then the drilling frame 2 is inserted into the two pin holes 16 through pin shafts, so that the drilling frame 2 is locked on the crawler chassis 1. Two ends of the drill frame 2 in the length direction are respectively provided with a hydraulic lifting frame 3 as a lifting mechanism, and the hydraulic lifting frames 3 can be lifting frames used on a forklift or lifting frames in other forms. Be equipped with a lifting crossbeam 6 on the hydraulic lifting frame 3, lifting crossbeam 6 follows the width direction level of drilling rig 2 sets up, and the both ends of lifting crossbeam 6 are the suspension respectively in the both sides of corresponding hydraulic lifting frame 3, and hydraulic lifting frame 3 during operation, lifting crossbeam 6 is rised or is reduced. Two lifting beams 6 on the two hydraulic lifting frames 3 jointly form a supporting frame for supporting the drilling operation platform 4.

Because the both ends of lifting crossbeam 6 all are the suspension state, consequently, creep into 4 width direction's of operation platform both ends and install respectively on the support frame body of hydraulic pressure lifting frame 3 both sides, creep into 4 width direction's of operation platform middle part and be equipped with the breach of certain area, in order to avoid hydraulic pressure lifting frame 3.

Two drilling rod dismounting areas are respectively arranged on two sides of the width direction of the upper surface of the drilling operation platform 4, a power mechanism and a guide mechanism for driving the drilling rod 8 to drill are arranged in the two drilling rod dismounting areas, and the drilling rod 8 is installed on the power mechanism and is guided by the guide mechanism to linearly drill and punch. The middle area of the drilling operation platform 4 in the width direction is wide, the stability and the safety are high, and the drilling operation platform can be used for operating personnel to move on the platform and placing tools and equipment such as a drill rod and a drill bit.

One axle sleeve 7 is established to the both ends cover respectively of lifting crossbeam 6, and axle sleeve 7 can rotate around lifting crossbeam 6, also can follow lifting crossbeam 6's axial round trip movement, creep into 4 width direction's of operation platform both ends respectively with two axle sleeve 7 fixed connection, when two hydraulic lifting frame 3 drive lifting crossbeam 6 risees or reduces not co-altitude like this, creep into operation platform 4 and will form different every single move angle, and then satisfy the needs of drilling.

In order to prevent the sliding sleeve 7 from slipping off the lifting beam 6, a stop ring is provided on the lifting beam 6 outside the sliding sleeve 7.

One end of the drill rod dismounting area is provided with a power head 5 for driving the drill rod 8 to advance or rotate, and the power head 5 is of a conventional structure. The power head 5 is installed on a sliding base, the sliding base is arranged on a guide rail of a drill rod dismounting area in a sliding mode, a chain and chain wheel mechanism is arranged on the drill rod dismounting area, a chain is connected with the sliding base, the sliding base is driven to move linearly along the guide rail, and drilling pore forming of the drill rod 8 and a drill bit is achieved.

The other end of the drill rod dismounting area is also provided with a guide ring 10, the drill rod 8 penetrates through the guide ring 10, and the guide ring 10 can be used for supporting the drill rod 8 and keeping the drill rod 8 and the drilling operation platform 4 parallel and linearly drilling.

The structure of the pneumatic percussion drill bit 9 used in the present invention is shown in fig. 4 and 5, and the pneumatic percussion drill bit 9 includes an outer tube 901, an inner tube 902, and a hard extrusion head 903.

The outer tube divide into from the front to back in proper order: the front taper part 904, the expanding part 905, the rear taper part 906 and the tail part 907, wherein the front taper part 904 and the rear taper part 906 are both in a truncated cone shape and have conical surfaces. The front cone 904 is mainly used for extruding soil to form a hole during drilling and expanding the hole diameter, so that the front cone 904 can also be called a drilling part functionally, the small-diameter end of the front cone 904 is the front end of the outer pipe 901 and is fixedly connected with the hard extrusion head 903, and the large-diameter end of the front cone 904 is smoothly connected with the front end of the diameter-expanding part 905. The diameter expanding part 905 is mainly used for determining the final aperture of a hole drilled by the drilling part, a positioning ring for determining the aperture is arranged on the diameter expanding part 905, the diameter expanding part 905 can be cylindrical or drum-shaped, and for the cylindrical shape, the positioning ring is a cylindrical surface; for the drum shape, the side surface of the drum shape is a cambered surface with a convex middle part, so the position with the maximum diameter on the drum shape is the positioning ring, and the outer diameter of the positioning ring is the hole diameter of the drilled hole. The rear cone 906 is mainly used for exhausting air towards the rear of a drilled hole, so that the large-diameter end of the conical surface of the rear cone 906 is connected with the rear end of the expanding portion 905, the small-diameter end of the conical surface of the rear cone 906 is connected with the tail portion 907, the rear cone 906 and the front cone 904 are respectively positioned at two ends of the expanding portion 905, the inclination directions of the conical surfaces of the rear cone 906 and the tail portion 907 are opposite, the rear cone 906 and the hole wall are not in contact, and therefore smooth air exhausting is facilitated. The tail portion 907 is mainly used for connecting a pneumatic impactor, so that an inner thread hole is formed in the tail portion 907, and a gas channel is further formed in the tail portion 907 to communicate a gas path of the pneumatic impactor with a gas path inside the drill bit.

The hard extrusion head 903 is a steel ball head, and is welded at the small-diameter end of the front cone portion 904, a part of spherical surface on the steel ball head is located in the tube cavity of the outer tube 901, the rest spherical surface is located outside the outer tube 901, and the depth of the steel ball head entering the outer tube 901 is smaller than the radius of the steel ball head.

The inner tube 902 is a cylindrical hollow tube, the front end of the inner tube 902 is welded to the steel ball head to form a seal at the front end of the inner tube 902, and the rear end of the inner tube 902 is welded to the inner wall of the tail 907 or the rear tapered part 906, but the connection between the port at the rear end of the inner tube 902 and the gas passage in the tail 907 is ensured, so that air from the pneumatic impactor can enter the bit along the inner tube 902. The inner tube 902 has a plurality of air holes on its wall to communicate the lumen of the inner tube 902 with the lumen of the outer tube 901.

Further, the generatrix length of the conical surface of the front cone portion 904 is greater than that of the conical surface of the rear cone portion 906, so that the drilling resistance is reduced, and the drilling efficiency is improved.

Further, the length of the exhaust slot 908 is not greater than the generatrix length of the conical surface of the rear cone 906 to ensure that the air can be exhausted backwards and not blocked.

The utility model discloses a pneumatic percussion bit 9 installs the front end at pneumatic impacter when using, and pneumatic percussion bit 9's stereoplasm extrusion head 903 and preceding cone 904 extrusion soil layer and impel forward to enlarge the drilling aperture thereupon, the drilling aperture is confirmed by the sizing ring of hole enlargement portion 905 at last. As shown by the arrows in fig. 5, after air in the pneumatic impactor enters the inner tube 902 through the air passage of the tail 907 of the drill bit, the air enters the tube cavity between the outer tube 901 and the inner tube 902 from the vent holes on the inner tube 902, and then is exhausted from the exhaust slit 908 of the rear cone 906.

When the utility model is used, when drilling, the length direction of the drill frame 2 is vertical to the advancing direction of the crawler chassis 1, and the drilling direction of the drill rod 8 is the same as the length direction of the drill frame 2, so that the drilling direction is vertical to the advancing direction of the crawler, and the crawler chassis 1 can well provide enough supporting force for the drilling operation; when the drilling machine is transferred on an operation site, the length of the drill frame 2 is large, so that the drill frame 2 needs to be rotated by 90 degrees, the length direction of the drill frame 2 is consistent with the advancing direction of the crawler chassis 1, and the width of the drill frame 2 is equivalent to that of the crawler chassis 1, so that the movement of the drilling machine cannot be influenced. It should be noted that if only the next position of drilling is adjusted, the drill rig 2 does not need to be rotated, and the whole drilling machine is only used for advancing.

In the embodiment, the front end and the rear end are referred to by taking the drilling direction of the drilling machine as a reference, the drilling direction is front, and vice versa.

The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and it should be understood by those of ordinary skill in the art that the embodiments of the present invention can be modified or replaced with equivalents with reference to the above embodiments, and any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention are all within the scope of the claims of the present application.

Claims

1. The utility model provides a crawler-type percussion drill, includes crawler-type chassis and sets up the drill carriage on crawler-type chassis, its characterized in that: the drilling frame is rotatably arranged on the crawler chassis through a slewing bearing so as to realize 360-degree rotation of the drilling frame in a horizontal plane; the relative both ends of drill carriage respectively set up a lifting mechanism, install the lifting crossbeam that can the oscilaltion in the lifting mechanism, the lifting crossbeam parallel arrangement on two lifting mechanisms to constitute the support frame that is used for the installation to creep into the operation platform, creep into the operation platform with the cover is established on the lifting crossbeam and is connected, and the axle sleeve can drive and creeps into the operation platform for lifting crossbeam axial displacement and rotation, it is regional to be equipped with two drilling rod dismouting that are located the lifting mechanism both sides respectively on the operation platform to creep into, is equipped with drive drilling rod perforating power unit and guiding mechanism in drilling rod dismouting region.

2. A track-type impact drill according to claim 1, characterized in that: the drilling frame and the crawler chassis are respectively provided with a pin hole, and the position of the drilling frame on the crawler chassis is locked through the matching of the pin shaft and the pin hole.

3. A track-type impact drill according to claim 1, characterized in that: and the lifting beam is provided with a limiting ring positioned on the outer side of the shaft sleeve so as to prevent the drilling operation platform from being separated from the lifting beam.

4. A track-type impact drill according to claim 1, characterized in that: the lifting mechanism is a hydraulic lifting frame.

5. A track-type impact drill according to claim 1, characterized in that: the pneumatic percussion drill bit comprises an outer tube, an inner tube and a hard extrusion head, wherein the hard extrusion head is fixed at the front end of the outer tube, the inner tube is arranged in a tube cavity of the outer tube, the front end of the inner tube is closed, the rear end of the inner tube is fixed on the inner wall of the outer tube and is communicated with a gas circuit of the pneumatic percussion device through an opening at the tail of the outer tube, a plurality of vent holes are formed in the inner tube to communicate the tube cavity of the inner tube with the tube cavity of the outer tube, the outer tube is provided with a front cone part and a rear cone part, a diameter expanding part used for determining a drilling hole diameter is arranged between a large-diameter end of the front cone part and a large-diameter end of the rear cone part, and a plurality of exhaust slits are formed in the conical.

6. A track-type impact drill according to claim 5, characterized in that: the length of the generatrix of the conical surface of the front cone part is larger than that of the generatrix of the conical surface of the rear cone part.

7. A track-type impact drill according to claim 5, characterized in that: the length of the exhaust slit is not more than the length of a generatrix of the conical surface of the rear cone.

8. A track-type impact drill according to claim 5, characterized in that: the expanding part is cylindrical or drum-shaped.

9. A track-type impact drill according to claim 5, characterized in that: the front cone part, the diameter expanding part and the rear cone part are smoothly connected in sequence.

10. A track-type impact drill according to claim 5, characterized in that: the front cone part, the diameter expanding part, the rear cone part and the tail part are integrally formed.