CN110318670B

CN110318670B - Rotary drilling rig for bridge construction

Info

Publication number: CN110318670B
Application number: CN201910454310.3A
Authority: CN
Inventors: 黄绍豪
Original assignee: Heilongjiang Longjian Road & Bridge First Engineering Co ltd
Current assignee: HEILONGJIANG LONGJIAN ROAD & BRIDGE THE FIRST ENGINEERING Co.,Ltd.
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-09-18
Anticipated expiration: 2039-05-29
Also published as: CN110318670A

Abstract

The invention discloses a rotary drilling rig for bridge construction, which structurally comprises a mast assembly, a walking chassis, an amplitude transformer, a drill rod and a drilling tool, wherein the amplitude transformer is fixedly arranged on the walking chassis, the amplitude transformer and the mast assembly are controlled by a hydraulic system, the mast assembly is provided with the drill rod and the drilling tool, one end of the drill rod, which is far away from the drilling tool, is provided with a power head, and the drilling tool comprises a drilling disc, a high-speed rotating machine, a rotating shaft, an external bearing and a drilling hole. The inner space of the drill hole is enlarged while the soil unloading effect is improved.

Description

Rotary drilling rig for bridge construction

Technical Field

The invention relates to the field of bridge construction, in particular to a rotary drilling rig for bridge construction.

Background

The rotary drilling rig is a construction machine suitable for hole forming operation in building foundation engineering, and is mainly suitable for bridge pier foundation construction of sandy soil, gravel soil or bedrock with medium hardness or lower in bridge construction.

The rotary drilling rig directly takes out broken rock soil from the hole by using the drill bit, if the rotary drilling rig carries out rotary drilling work after raining, soil at the moment can be wet, and the position of the soil drilled by the drill bit close to the inner hole of the drill bit is difficult to take out from the soil in the hole (namely, stuck on the surface of a rotating shaft) due to the large adhesion of the wet soil layer, so that the clay in the inner hole of the drill bit seriously causes the inner space to be reduced and indirectly promotes the soil unloading frequency to be increased.

Disclosure of Invention

Aiming at the problems, the invention provides a rotary drilling rig for bridge construction.

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a bridge construction rotary drilling rig, its structure includes mast assembly, walking chassis, amplitude transformer frame, drilling rod, drilling tool, fixed mounting has amplitude transformer frame on the walking chassis, becomes through hydraulic system control between amplitude transformer frame and the mast assembly, it has drilling rod and drilling tool to constitute on the mast assembly the drilling rod is kept away from the one end of drilling tool and is equipped with the unit head, including drilling disc, high-speed commentaries on classics machine, pivot, external bearing and drilling in the drilling tool, the drilling wing has evenly been welded to the surface of drilling disc, the rotating electrical machines drive that high-speed commentaries on classics machine was equipped with through inside, rotating electrical machines's output shaft and interior hub connection, the axle center position at drilling is installed with the pivot to high-speed commentaries on classics machine, the pivot is connected with high.

As a further improvement of the present invention, the inner shaft is mounted inside the rotating shaft and is screw-fitted to a screw disk on an outer surface of the connecting end of the output shaft, and a hollow shaft is mounted between the screw disk and the rotating electrical machine.

As a further improvement of the invention, an ejection mechanism, a baffle body and an inner shaft are arranged in the rotating shaft, the ejection mechanism is provided with a follow-up head and a sealing ejector plate, and the follow-up head and the sealing ejector plate are integrated.

As a further improvement of the invention, the sealing ejector plate is of a trapezoidal structure, and sealing rubber strips sealed on the rotating shaft are arranged in the positions of the two inclined surfaces to complete the side sealing of the rotating shaft and prevent soil from entering.

As a further improvement of the invention, a stop body with a circular structure is fixed at the top end of the inner shaft.

As a further improvement of the invention, the follow-up head is of a rectangular structure, and two ends of the follow-up head are of arc structures and are in indirect contact fit with the blocking body.

As a further improvement of the invention, the follow-up head is matched with the horizontal line of the sealing ejector plate through a spring.

As a further improvement of the invention, the threaded disc is installed inside the high-speed rotary machine, and the drill fins are of a right-angled triangle structure.

As a further improvement of the invention, the threaded disc is arranged in the high-speed rotating machine, the drilling wings are of a right-angled triangle structure, a plurality of sharp spines are arranged on the inclined surface, and the rotary drilling efficiency is improved by using the sharp spines and the tip formed by the inclined surface.

As a further improvement of the invention, the mast in the mast assembly is three foldable sections, which are divided into an upper section, a middle section and a lower section, and the upper section and the lower section are folded and installed in a transportation state so as to reduce the length of the whole machine in the transportation state.

As a further improvement of the invention, the walking chassis has the function of realizing the walking and the displacement of the drilling machine, mainly comprises a hydraulic motor, a speed reducer, a driving wheel, a tensioning device, a crawler belt, a bearing wheel, a supporting chain wheel, a guide wheel and other components, and the walking device can realize the actions of advancing, retreating, left turning, right turning, in-situ horizontal rotation and the like by being controlled by a hydraulic system.

Compared with the prior art, the invention has the following beneficial effects:

1. the sealing ejector plate and the follow-up head arranged in the rotating shaft matched in the drill hole are matched with the baffle body and the inner shaft together, when the soil is unloaded, the rotating motor rotates forwards to unscrew the inner shaft meshed with the rotating shaft, and the baffle body arranged at the top end of the rotating shaft in the unscrewing process of the inner shaft is larger than the distance between the follow-up heads at two sides in diameter, so that the follow-up heads at two sides are ejected out when the baffle body slides downwards to be pushed out by the sealed sealing ejector plate, the soil adhered to the surface of the rotating shaft is pushed down, the soil unloading effect is improved, and the inner space of the drill hole is enlarged.

2. According to the invention, a 10cm gap is reserved between the adjacent follow-up heads, when the blocking body slides downwards along with the rotation of the inner shaft to push out the follow-up heads at two sides, the follow-up heads are reset under the elastic action based on the spring between the follow-up heads and the sealing ejector plate in the gap, and the soil adhered to the outer surface of the sealing ejector plate is bounced off.

3. The sealing ejector plate is of a trapezoidal structure, and because the two sides of the sealing ejector plate are both inclined edges, soil can slide off along with the inclined edges based on the gravity flow principle.

4. The follow-up head of the invention contacts with the two sides of the baffle body to form arc surfaces, so that the right-angle pushing contact is avoided, the movement of the baffle body is limited, and the screwing-out and retracting of the inner shaft are met while the pushing-out of the sealing ejector plate is realized.

Drawings

FIG. 1 is a schematic diagram of an appearance three-dimensional structure of a rotary drilling rig for bridge construction.

Fig. 2 is a schematic perspective view of the drilling tool of the present invention.

Fig. 3 is a schematic sectional view of a drilling tool according to the present invention.

FIG. 4 is a schematic view of the internal structure of the rotating shaft and the high-speed rotating machine according to the present invention.

Fig. 5 is an enlarged schematic view of the structure of the ejection mechanism in fig. 4 according to the present invention.

FIG. 6 is a schematic view of a dynamic structure of the present invention when the rotating shaft rotates.

In the figure: the drill rod-driven rotary drill comprises a mast assembly-1, a walking chassis-2, a luffing jib-3, a drill rod-11, a drill-12, a drill plate-121, a high-speed rotary machine-122, a rotating shaft-123, an external bearing-124, a drill hole-21 a, a drill fin-21 b, a threaded disc-221, a rotating motor-223, a hollow shaft-222, an ejection mechanism-23 a, a baffle-23 b, an inner shaft-23 c, a follow-up head-a 1 and a sealing ejection plate-a 2.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, fig. 1 to 6 schematically show the structure of the rotary drilling rig according to the embodiment of the invention, and the invention is further explained below by combining with the specific embodiment.

In the description of the present invention, it is to be understood that the terms "central," "lateral," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "side," and the like, as used herein, are used in an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Examples

As shown in fig. 1-6, the invention provides a rotary drilling rig for bridge construction, which structurally comprises a mast assembly 1, a walking chassis 2, an amplitude-varying frame 3, a drill rod 11 and a drilling tool 12, wherein the amplitude-varying frame 3 is fixedly mounted on the walking chassis 2, the amplitude-varying frame 3 and the mast assembly 1 are controlled by a hydraulic system, the drill rod 11 and the drilling tool 12 are formed on the mast assembly 1, a power head is arranged at one end of the drill rod 11, which is far away from the drilling tool 12, the drilling tool 12 comprises a drill disk 121, a high-speed rotating machine 122, a rotating shaft 123, an external bearing 124 and a drilling hole 21a, drilling fins 21b are uniformly welded on the outer surface of the drill disk 121, the high-speed rotating machine 122 is driven by a rotating motor 223 arranged inside, an output shaft of the rotating motor 223 is connected with an inner shaft 23c, the high-speed rotating machine 122 and the rotating shaft 123 are mounted at the axial center position of the drilling hole 21a, the inner shaft 23c is installed inside the rotating shaft 123, and is in threaded fit with the threaded disc 221 on the outer surface of the connecting end of the output shaft, a hollow shaft 222 is installed between the threaded disc 221 and the rotating motor 223, the rotating shaft 123 is provided with an ejection mechanism 23a, a stopper 23b and an inner shaft 23c, the ejection mechanism 23a is provided with a follow-up head a1 and a sealing ejection plate a2, the follow-up head a1 and the sealing ejection plate a2 are integrated, the sealing ejection plate a2 is in a trapezoidal structure, sealing rubber strips enclosed in the rotating shaft 123 are arranged in two inclined plane positions to complete the side sealing of the rotating shaft 123 and prevent soil from entering, the top end of the inner shaft 23c is fixed with a stopper 23b in a circular structure, the follow-up head a1 is in a rectangular structure, two ends of the follow-up head a1 are in arc structures and are in indirect contact fit with the stopper 23b, the follow-up head a1 and the sealing ejection plate a2 are, the threaded disc 221 is installed inside the high-speed rotary machine 122, the drill fins 21b are in a right-angled triangle structure, the threaded disc 221 is installed inside the high-speed rotary machine 122, the drill fins 21b are in a right-angled triangle structure, the inclined plane is provided with a plurality of sharp spines, the rotary digging efficiency is improved by utilizing the sharp point formed by the sharp spines and the inclined plane, the mast in the mast assembly 1 is three sections which can be folded and divided into an upper section, a middle section and a lower section, when in a transportation state, the upper section and the lower section are folded and installed, the length of the whole machine is reduced in a transportation state, the walking chassis 2 has the function of realizing the walking and the displacement of the drilling machine, and mainly comprises a hydraulic motor, a speed reducer, a driving wheel, a tensioning device, a crawler belt, a bearing wheel, a supporting chain wheel, a guide wheel and other components, and the walking device can realize the actions of advancing, retreating, left turning, right turning, in-situ horizontal rotation and the like by being controlled by a hydraulic system.

The following description is made on the working principle of the rotary drilling rig in the above technical scheme:

the hole forming process of the rotary drilling rig comprises the steps of firstly enabling a drilling tool 12 to be correctly positioned to a pile position through the self walking function of the drilling rig and a mast luffing mechanism, lowering a drill rod 11 by utilizing the guide of a mast, placing a barrel type drilling tool 12 with a valve at the bottom to a hole position, providing torque for the drill rod 11 by a power head of the drilling rig, enabling a drill disk 121 in the drilling tool 12 to gyrate to break rock soil, and then putting the drilling tool 12 out, wherein when the soil is unloaded, a rotating motor 223 rotates forwards, an inner shaft 23c connected with the rotating motor 223 is selected by matching with a threaded disk 221, so that a rotating shaft 123 is lifted out of the hole to complete the soil unloading, when the inner shaft 23c is screwed out, a baffle 23b arranged at the top end of the inner shaft synchronously moves downwards to abut against follow-up heads a1 at two sides, so as to push out a sealing ejection plate a2, when the soil unloading is realized, the soil adhered to be taken out on the outer surface of, the working efficiency is greatly improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a bridge construction rotary drilling rig which characterized in that: the structure of the drilling machine comprises a mast assembly (1), a walking chassis (2), an amplitude-changing frame (3), a drill rod (11) and a drilling tool (12), wherein the amplitude-changing frame (3) is fixedly installed on the walking chassis (2), the amplitude-changing frame (3) and the mast assembly (1) are controlled through a hydraulic system, the drill rod (11) and the drilling tool (12) are formed on the mast assembly (1), and a power head is arranged at one end, far away from the drilling tool (12), of the drill rod (11);

the drilling tool (12) comprises a drilling disc (121), a high-speed rotating machine (122), a rotating shaft (123), an external bearing (124) and a drilling hole (21a), drilling fins (21b) are uniformly welded on the outer surface of the drilling disc (121), the high-speed rotating machine (122) is driven by a rotating motor (223) arranged inside the high-speed rotating machine, an output shaft of the rotating motor (223) is connected with an inner shaft (23c), the high-speed rotating machine (122) and the rotating shaft (123) are installed at the axial center position of the drilling hole (21a), the rotating shaft (123) is connected with the high-speed rotating machine (122) through the external bearing (124), the inner shaft (23c) is installed inside the rotating shaft (123), and is in threaded fit with a threaded disc (221) on the outer surface of the connecting end of the output shaft, a hollow shaft (222) is installed between the threaded disc (221) and the rotating motor (223), and an ejection mechanism (23a stop body (23b) is arranged in the, And an inner shaft (23c), wherein the ejection mechanism (23a) is provided with a follow-up head (a1) and a sealing ejection plate (a2), and the follow-up head (a1) and the sealing ejection plate (a2) are integrated.

2. The rotary drilling rig for bridge construction according to claim 1, characterized in that: the sealing ejector plate (a2) is of a trapezoidal structure, and sealing rubber strips sealed on the rotating shaft (123) are arranged in the positions of the two inclined planes.