Rotary drilling rig for building construction

Abstract

The utility model discloses a rotary drilling rig for building construction. The rotary drilling rig comprises a chassis; the mast is arranged on the chassis; the drill rod is movably connected to the mast; the hoisting mechanism is arranged on the chassis, and the hoisting mechanism is connected with the drill rod so as to drive the drill rod to move; the power head is arranged on the drill rod; the connecting drill bit is detachably connected with the drill rod; the middle drill bit is detachably connected with the connecting drill bit; and the bottom drill bit is detachably connected with the middle drill bit. And the power head starts the drill rod to rotate, and the drill rod is controlled by the hoisting mechanism to gradually sink, so that a section of rotary digging hole can be formed in the hole site. When the bottom drill bit is damaged, only the bottom drill bit is replaced, the maintenance and replacement cost of the rotary drilling machine is reduced, the length of the composite drill bit is increased through the middle drill bit, the frequency of pulling out the drill bit to throw soil can be reduced, and therefore the drilling efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the rotary drilling rig technical field, especially relates to a rotary drilling rig for building construction. BACKGROUND

[0002] The rotary drilling rig is a kind of construction machinery suitable for hole-forming operation in building foundation engineering.It is mainly suitable for sand, clay, silty soil and other soil layer construction, and is widely used in various foundation construction such as pouring and continuous foundation reinforcement.

[0003] The drill bit of the rotary drilling rig needs to bear a large impact force in the working process, and the soil condition is unstable, so that the drill bit is easily damaged in the drilling process of the rotary drilling rig.The drill bit of the traditional rotary drilling rig is short to reduce maintenance and replacement cost, but the drill bit needs to be frequently taken out and the mud on the drill bit needs to be cleaned to drill again, so the short drill bit undoubtedly increases the number of taking out the drill bit, resulting in low drilling efficiency.

[0004] Therefore, it is urgent to provide a rotary drilling rig for building construction with high drilling efficiency. CONTENT OF THE INVENTION

[0005] The present application provides a rotary drilling rig for building construction, which aims to solve the problem of short drill bit of the rotary drilling rig in the prior art, which undoubtedly increases the number of taking out the drill bit, resulting in low drilling efficiency.

[0006] To achieve the above-mentioned purpose, the present application provides a rotary drilling rig for building construction, which comprises a chassis, a mast arranged on the chassis, a drill rod movably connected to the mast, a winch mechanism arranged on the chassis and connected to the drill rod to drive the drill rod to move, and a power head arranged on the drill rod, and further comprises a connecting drill bit, which is detachably connected to the drill rod, an intermediate drill bit, which is detachably connected to the connecting drill bit, and a bottom drill bit, which is detachably connected to the intermediate drill bit.

[0007] In some embodiments, the connecting drill bit and the intermediate drill bit are detachably connected through a connecting assembly, and the intermediate drill bit and the bottom drill bit are detachably connected through the connecting assembly.

[0008] In some embodiments, the connecting assembly comprises a male connecting end, a female connecting end and a fastener.

[0009] In some embodiments, the connecting assembly further comprises a sealing ring arranged on the female connecting end and a ring groove on the male connecting end matched with the sealing ring.

[0010] In some embodiments, further comprising: a trolley, the trolley being movably arranged on the mast, the drill rod being rotatably connected to the trolley, and the trolley being connected to the winch mechanism.

[0011] In some embodiments, further comprising: a pressurized oil cylinder, the pressurized oil cylinder being arranged on the mast, and the pressurized oil cylinder being provided with an output end, and the output end being connected to the power head.

[0012] The technical scheme of the present application provides a rotary drilling rig for building construction, comprising: a chassis, a mast, a drill rod, a winch mechanism, a power head, a connecting drill bit, an intermediate drill bit, and a bottom drill bit, the mast being arranged on the chassis; the drill rod being movably connected to the mast; the winch mechanism being arranged on the chassis, and the winch mechanism being connected to the drill rod to drive the drill rod to move; the power head being arranged on the drill rod; the connecting drill bit being detachably connected to the drill rod; the intermediate drill bit being detachably connected to the connecting drill bit; and the bottom drill bit being detachably connected to the intermediate drill bit. In the process of drilling, the chassis is moved to a preset position, and the drill rod is aligned with a hole position, at this time, the connecting drill bit is installed on the drill rod, the intermediate drill bit is installed on the connecting drill bit, and finally, the bottom drill bit is installed on the intermediate drill bit, the drill rod is controlled to descend by the winch mechanism, and the bottom end of the bottom drill bit contacts the ground surface, the power head drives the drill rod to rotate, and drives the connecting drill bit, the intermediate drill bit, and the bottom drill bit to rotate, at this time, the drill rod is gradually sunk by the winch mechanism, and a rotary drilling hole is formed at the hole position, when the single rotary drilling depth is approximately equal to the total length of the intermediate drill bit and the bottom drill bit, the power head stops outputting rotary power, the drill rod is controlled to rise by the winch mechanism, the mast is rotated, the drill rod is no longer aligned with the hole position, the power head drives the drill rod to rotate again, the soil on the connecting drill bit, the intermediate drill bit, and the bottom drill bit is thrown out, and the above steps are repeated to form a rotary drilling hole. The connecting drill bit, the intermediate drill bit, and the bottom drill bit form a composite drill bit, when the bottom drill bit is damaged, only the bottom drill bit needs to be replaced, the maintenance and replacement cost of the rotary drilling rig is reduced, the length of the composite drill bit is increased by the intermediate drill bit, the frequency of pulling out the drill bit to throw out the soil is reduced, and the drilling efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical schemes in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort, wherein:

[0014] Figure 1 It is a front view of the rotary drilling rig for building construction in an embodiment of the present application;

[0015] Figure 2 It is a local enlarged view of part A in 1.

[0016] Figure 3 is a partial enlarged view of B part in 1;

[0017] Figure 4 is a sectional view of the connecting assembly in an embodiment of the present application.

[0018] In the figure: power head 1, drill rod 2, trolley 3, hoisting mechanism 4, mast 5, chassis 6, connecting drill bit 71, intermediate drill bit 72, bottom drill bit 73, pressurized oil cylinder 8, luffing mechanism 9, female connecting end 10, male connecting end 11, screw rod 12, locking nut 13, sealing ring 14, gasket 15. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indications also change accordingly.

[0021] It should also be noted that when an element is referred to as being “fixed to” or “set on” another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or there can be a middle element.

[0022] In addition, the descriptions involving “first”, “second”, etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present application.

[0023] Reference is made to Figure 1 , Figure 2 and Figure 3As shown, the application proposes a rotary drilling rig for building construction, comprising: a chassis 6; a mast 5, the mast 5 being arranged on the chassis 6; a drill rod 2, the drill rod 2 being movably connected to the mast 5; a winch mechanism 4, the winch mechanism 4 being arranged on the chassis 6, the winch mechanism 4 being connected to the drill rod 2 to drive the drill rod 2 to move; a power head 1, the power head 1 being arranged on the drill rod 2; further comprising: a connecting drill bit 71, the connecting drill bit 71 being detachably connected to the drill rod 2; an intermediate drill bit 72, the intermediate drill bit 72 being detachably connected to the connecting drill bit 71; a bottom drill bit 73, the bottom drill bit 73 being detachably connected to the intermediate drill bit 72.

[0024] The chassis 6 is the structural basis of the rotary drilling rig for building construction, and other structures on the rotary drilling rig for building construction are directly or indirectly mounted on the chassis 6. The chassis 6 comprises a traveling mechanism, a base frame, and a rotary table. The function of the traveling mechanism is to realize the walking and shifting of the rotary drilling rig. It is mainly composed of a hydraulic motor, a speed reducer, a driving wheel and a tensioning device, a track, a load wheel, a chain sprocket, a guide wheel and other components. The base frame is used to install the traveling mechanism and the rotary table. The rotary table is rotatably installed on the base frame, and the rotary table is provided with a rotary mechanism for controlling the rotation angle of the rotary table. The rotary table is the installation basis of most structures of the rotary drilling rig, and the rotary table is also provided with a cab and other structures. The winch mechanism 4, the mast 5 and the like are also mounted on the rotary table. Since the chassis 6 is not the invention point claimed by the application, and is a mature prior art, the specific structure of the chassis 6 is not described in detail in this embodiment.

[0025] The mast 5 is a guide component of the drill rod 2, the power head 1 and the like. The chassis 6 is provided with an amplitude changing mechanism 9 for controlling the mast 5. The amplitude changing mechanism 9 comprises a movable arm, a triangular frame, a support rod, an amplitude changing cylinder, a mast cylinder and the like. Through the action of the amplitude changing cylinder and the mast cylinder, the mast 5 can be moved away from or close to the chassis 6 and the front and rear inclination angle of the mast 5 can be changed. The mast 5 is also provided with a pulley frame for bearing the steel wire rope of the winch mechanism 4. Since the mast 5 and the amplitude changing mechanism 9 are not the invention point claimed by the application, and are mature prior art, the specific structure of the mast 5 and the amplitude changing mechanism 9 is not described in detail in this embodiment.

[0026] The winch mechanism 4 comprises a hydraulic speed reduction mechanism, a winding drum, a winch support, a steel wire rope, a rope sleeve and the like. The function of the winch mechanism 4 is to lift or lower the drill rod 2, and it is an important component for the drilling rig to complete the drilling work. The lifting and lowering of the drill rod 2 is driven and controlled by the hydraulic system. Since the winch mechanism 4 is not the invention point claimed by the application, and is a mature prior art, the specific structure of the winch mechanism 4 is not described in detail in this embodiment.

[0027] The power head 1 and the drill rod 2 are power structures of the rotary drilling machine. The power head 1 comprises a hydraulic motor, a speed reducer, a power box, a buffer device, a sliding frame, a coupling plate and a pressure disc. The power box is provided with a set of gear rings fixed with a hub, and the inner wall of the hub is provided with three sets of driving keys. The high-speed rotation of the hydraulic motor is reduced by the speed reducer, and the power of the speed reducer is input to the gear rings in the power box. The hub fixed with the gear rings rotates, and the driving keys on the hub drive the drill rod 2 to rotate, realizing the rotary motion of the drilling machine in the drilling work. Since the power head 1 and the drill rod 2 are not the invention points claimed in the application, and are mature prior art, the specific structure of the power head 1 and the drill rod 2 is not described in detail in the embodiment.

[0028] The connecting drill bit 71 is used for connecting the drill rod 2, the end of the drill rod 2 is provided with a connecting end, the connecting end forms a detachable connection with the connecting drill bit 71, the intermediate drill bit 72 is installed on the connecting drill bit 71, the bottom drill bit 73 is installed on the intermediate drill bit 72, and the composite drill bit is formed through the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73. When the bottom drill bit 73 is damaged, only the bottom drill bit 73 can be replaced, the maintenance and replacement cost of the drill bit is reduced, the length of the composite drill bit is increased through the intermediate drill bit 72, the frequency of pulling out the drill bit to throw out the soil is reduced, and the drilling efficiency is improved.

[0029] Specifically, in the drilling process, the chassis 6 is moved to a preset position, and the drill rod 2 is aligned with the hole position. At this time, the connecting drill bit 71 is installed on the drill rod 2, the intermediate drill bit 72 is installed on the connecting drill bit 71, and finally the bottom drill bit 73 is installed on the intermediate drill bit 72. The winch mechanism 4 is controlled to lower the drill rod 2, and the bottom end of the bottom drill bit 73 contacts the soil surface. The power head 1 drives the drill rod 2 to rotate, and drives the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73 to rotate. At this time, the drill rod 2 is gradually lowered through the control of the winch mechanism 4, and a rotary drilling hole is formed at the hole position. When the single rotary drilling depth is approximately equal to the total length of the intermediate drill bit 72 and the bottom drill bit 73, the power head 1 stops outputting the rotary power, the drill rod 2 is raised through the control of the winch mechanism 4, the rotating mast 5 is rotated, the drill rod 2 is no longer aligned with the hole position, the power head 1 drives the drill rod 2 to rotate again, the soil on the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73 is thrown out, and the above steps are repeated to form a rotary drilling hole. The composite drill bit is formed through the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73. When the bottom drill bit 73 is damaged, only the bottom drill bit 73 can be replaced, the maintenance and replacement cost of the rotary drilling machine is reduced, the length of the composite drill bit is increased through the intermediate drill bit 72, the frequency of pulling out the drill bit to throw out the soil is reduced, and the drilling efficiency is improved.

[0030] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in some embodiments, further comprising: a connecting assembly, the connecting assembly enabling detachable connection between the connecting drill bit 71 and the intermediate drill bit 72, and detachable connection between the intermediate drill bit 72 and the bottom drill bit 73. The connecting assembly comprises: a male connecting end 11, the male connecting end 11 being provided with a plurality of first threaded holes at intervals in the circumferential direction; the male connecting end 11 being arranged at the bottom of the connecting drill bit 71, and at one end of the intermediate drill bit 72; a female connecting end 10, the female connecting end 10 being provided with a plurality of second threaded holes at intervals in the circumferential direction; the female connecting end 10 being arranged at the top of the bottom drill bit 73, and at the other end of the intermediate drill bit 72; and a fastener, the fastener connecting between the male connecting end 11 and the female connecting end 10. The fastener passes through the first threaded hole and the second threaded hole to enable connection between the male connecting end 11 and the female connecting end 10, and through the connection between the male connecting end 11 and the female connecting end 10, detachable connection between the connecting drill bit 71 and the intermediate drill bit 72, and detachable connection between the intermediate drill bit 72 and the bottom drill bit 73 are achieved.

[0031] In the present embodiment, the fastener comprises a screw rod 12, the screw rod 12 being provided with external threads adapted to the first threaded hole and the second threaded hole, and through screwing the screw rod 12 into the first threaded hole and the second threaded hole, connection between the male connecting end 11 and the female connecting end 10 is achieved. The fastener further comprises a locking nut 13 and a gasket 15, the locking nut 13 being screwed onto the screw rod 12, and the locking nut 13 indirectly contacting the female connecting end 10 through the gasket 15, and locking the screw rod 12 through friction force to avoid loosening of the relative position between the male connecting end 11 and the female connecting end 10.

[0032] Preferably, a plurality of intermediate drill bits 72 can be arranged, and flexible selection can be made according to design requirements, which is not specifically limited herein.

[0033] Referring to Figure 4 As shown, in some embodiments, the connecting assembly comprises: a sealing ring 14, the female connecting end 10 being provided with the sealing ring 14, and the male connecting end 11 being provided with a ring groove adapted to the sealing ring 14. The intermediate of the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73 needs to be hollowed out to reduce the mass, and in the process of drilling, mud needs to be prevented from entering the inside of the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73 to avoid corrosion of the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73 by the mud, and the arrangement of the sealing ring 14 effectively prevents the mud from entering, and improves the service life of the connecting drill bit 71, the intermediate drill bit 72 and the bottom drill bit 73.

[0034] Referring to Figure 1As shown in some embodiments, further comprising: a trolley 3, the trolley 3 is movably arranged on the mast 5, the drill pipe 2 is rotatably connected to the trolley 3, and the trolley 3 is connected to the winch mechanism 4. The trolley 3 is an auxiliary structure for the movement of the drill pipe 2, one end of the trolley 3 is provided with a bearing and is connected to the drill pipe 2, and the other end is provided with a lifting point connected to the steel wire rope of the winch mechanism. The trolley 3 is further provided with a guide groove, the guide groove is slidably connected to the guide rails on both sides of the mast 5, and the trolley 3 runs along the full length of the mast 5.

[0035] Referring to Figure 1 and Figure 3 As shown in some embodiments, further comprising: a pressurized oil cylinder 8, the pressurized oil cylinder 8 is arranged on the mast 5, and the pressurized oil cylinder 8 is provided with an output end connected to the power head 1. The pressurized oil cylinder 8 is used to apply drilling pressure and assist the normal progress of the drilling process.

[0036] The above only describes some or preferred embodiments of the present application, neither the text nor the drawings can limit the scope of protection of the present application, any equivalent structural transformation using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the scope of protection of the present application.

Claims

1. A rotary drilling rig for building construction, comprising: a chassis (6); a mast (5) provided on the chassis (6); a drill rod (2) movably connected to the mast (5); a hoisting mechanism (4) provided on the chassis (6), the hoisting mechanism (4) being connected to the drill rod (2) to drive the drill rod (2) to move; a power head (1) provided on the drill rod (2); characterized in that it further comprises: a connecting drill bit (71) detachably connected to the drill rod (2); an intermediate drill bit (72) detachably connected to the connecting drill bit (71); 2. The rotary drilling rig for construction work according to claim 1, characterized by a bottom drill bit (73) detachably connected to the intermediate drill bit (72). Further comprising:

3. The rotary drilling rig for construction work according to claim 2, characterized by a connecting assembly, the connecting drill bit (71) and the intermediate drill bit (72) are detachably connected through the connecting assembly, and the intermediate drill bit (72) and the bottom drill bit (73) are detachably connected through the connecting assembly. The connecting assembly comprises: a male connecting end (11) provided with a plurality of first threaded holes at intervals in the circumferential direction; a female connecting end (10) provided with a plurality of second threaded holes at intervals in the circumferential direction; 4. The rotary drilling rig for construction work according to claim 3, characterized by a fastener, the male connecting end (11) and the female connecting end (10) are connected through the fastener. The connecting assembly comprises:

5. The rotary drilling rig for construction work according to claim 1, characterized by a sealing ring (14), the female connecting end (10) is provided with the sealing ring (14), and the male connecting end (11) is provided with a ring groove matched with the sealing ring (14). Further comprising:

6. The rotary drilling rig for construction work according to claim 1, characterized by a trolley (3) movably provided on the mast (5), the drill rod (2) is rotatably connected to the trolley (3), and the trolley (3) is connected to the hoisting mechanism (4). Further comprising: a pressurized oil cylinder (8) provided on the mast (5), the pressurized oil cylinder (8) is provided with an output end, and the output end is connected to the power head (1).

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