CN111483932A - Lifting device and rotary drilling rig - Google Patents
Lifting device and rotary drilling rig Download PDFInfo
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- CN111483932A CN111483932A CN202010482490.9A CN202010482490A CN111483932A CN 111483932 A CN111483932 A CN 111483932A CN 202010482490 A CN202010482490 A CN 202010482490A CN 111483932 A CN111483932 A CN 111483932A
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- 238000005553 drilling Methods 0.000 title claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 abstract description 109
- 239000010959 steel Substances 0.000 abstract description 109
- 238000004804 winding Methods 0.000 description 13
- 238000010276 construction Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 230000005484 gravity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- 230000002452 interceptive effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D3/00—Portable or mobile lifting or hauling appliances
- B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
- B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
- B66D3/08—Arrangements of sheaves
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a lifting device and a rotary drilling rig, and relates to the technical field of engineering machinery. The lifting device is arranged on the rotary drilling rig and comprises a pulley assembly, a winch and a steel wire rope extending out of the winch, the pulley assembly comprises a movable pulley, a large pulley and a fixed pulley which are respectively arranged on a mast of the rotary drilling rig, the fixed pulley is positioned between the large pulley and the movable pulley, the steel wire rope is connected with a power head after sequentially passing around the large pulley, the movable pulley and the fixed pulley, the movable pulley is used for being connected with the power head of the rotary drilling rig, the power head is driven to move by the steel wire rope, three force application points are arranged between the steel wire rope and the power head, three sections of steel wire ropes respectively apply tension to the power head on the three force application points, the lifting force of the steel wire rope is 3 times, the technical problem that a rotary drilling rig with the lifting force of the steel wire rope of 3 times does not exist in the prior art is solved, and meanwhile, the lifting mechanism can reduce the requirement on the tensile strength of a single steel wire rope on the premise of ensuring the tensile force of the steel wire rope.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a lifting device and a rotary drilling rig.
Background
The rotary drilling rig is a construction machine suitable for hole forming operation in building foundation engineering, is mainly suitable for soil layer construction of sandy soil, cohesive soil, silty soil and the like, and is widely applied to foundation construction of various foundations such as cast-in-place piles, continuous walls, foundation reinforcement and the like.
The steel wire rope is an important consumed material in the use process of the rotary drilling rig equipment and is an important component for ensuring the safe production of the rotary drilling rig equipment. At present, the lifting force of a steel wire rope of a common rotary drilling rig is 1 multiplying power or 4 multiplying power, but 3 multiplying power is not included. However, in the practical application process, a rotary drilling rig with a steel wire rope lifting force of 3 times is still needed.
Disclosure of Invention
The invention aims to provide a lifting device and a rotary drilling rig, and aims to solve the technical problem that in the prior art, the rotary drilling rig cannot realize 3-rate lifting of a steel wire rope.
The embodiment of the invention is realized by the following steps:
the invention provides a lifting device which is arranged on a rotary drilling rig and comprises a pulley assembly, a winch and a steel wire rope extending out of the winch, wherein the pulley assembly comprises a movable pulley, a large pulley and a fixed pulley which are respectively arranged on a mast of the rotary drilling rig, the fixed pulley is positioned between the large pulley and the movable pulley, the steel wire rope sequentially bypasses the large pulley, the movable pulley and the fixed pulley and then is connected with a power head of the rotary drilling rig, and the movable pulley is used for being connected with the power head of the rotary drilling rig and driving the power head to move through the steel wire rope.
In an alternative embodiment of the present invention, the large pulley is rotatably connected to the mast through a pulley frame, the pulley frame and the mast form a predetermined angle and form an accommodating space, the mounting frame of the fixed pulley extends into the accommodating space and is fixed to the pulley frame and the mast, respectively, and the fixed pulley is located outside the accommodating space.
In an alternative embodiment of the present invention, the predetermined angle is 15 ° to 60 °.
In an optional embodiment of the present invention, the mounting frame includes an upper rib and a lower rib, and an included angle between the upper rib and the lower rib is equal to a preset angle.
In an optional embodiment of the present invention, the upper rib plate and the pulley yoke are correspondingly provided with first mounting holes, the first connecting member connects the upper rib plate and the pulley yoke through the first mounting holes, the lower rib plate and the mast are correspondingly provided with second mounting holes, and the second connecting member connects the lower rib plate and the mast through the second mounting holes.
In an alternative embodiment of the present invention, the large pulley includes a first large pulley and a second large pulley, the first large pulley and the second large pulley are located in the same plane, and the steel wire rope sequentially passes around the first large pulley and the second large pulley.
In an alternative embodiment of the present invention, the movable pulley is located in the same plane as the first large pulley and the second large pulley.
In an alternative embodiment of the present invention, the plane of the fixed pulley is perpendicular to the plane of the movable pulley.
In an optional embodiment of the invention, a lifting hook is arranged at one end of the steel wire rope extending out of the winch.
On the other hand, the embodiment of the invention provides a rotary drilling rig, which comprises a mast, a power head and any one of the lifting devices, wherein the lifting device comprises a large pulley and a fixed pulley, the large pulley and the fixed pulley are respectively connected with the mast, the power head is positioned on the side of the mast, and the movable pulley is connected with the power head.
The embodiment of the invention has the beneficial effects that:
the embodiment provides a lifting device, which is arranged on a rotary drilling rig and used for lifting a power head of the rotary drilling rig. The hoisting device comprises a pulley assembly, a winch and a steel wire rope extending out of the winch, one end of the steel wire rope is connected with the winch, the other end of the steel wire rope is connected with a power head of the rotary drilling rig after bypassing the pulley assembly, and a winding drum for the winch winds the steel wire rope, so that the power head is hoisted. The pulley assembly comprises a movable pulley, a large pulley and a fixed pulley which are respectively arranged on a mast of the rotary drilling rig, the fixed pulley is positioned between the large pulley and the movable pulley, and the steel wire rope is connected with the power head after sequentially passing around the large pulley, the movable pulley and the fixed pulley. The movable pulley is used for being connected with a power head of the rotary drilling rig, the power head is driven to move through a steel wire rope, the steel wire rope bypasses the movable pulley, so that two force application points are formed between the steel wire rope and the power head by means of the movable pulley, and the two sections of steel wire ropes respectively apply tension to the power head by means of the movable pulley. And after the steel wire rope finally winds the fixed pulley, the tail end of the steel wire rope is connected with the power head to form a third force application point. The wire rope winding method is different from other common multiplying power wire rope winding methods in the prior art, three force application points are shared between the wire rope and the power head, three sections of wire ropes respectively apply tension to the power head on the three force application points, the tension applied to the wire rope is only one third of the gravity applied to the power head, namely the lifting force of the wire rope is 3 multiplying power, the technical problem that a rotary drilling rig with the lifting force of the wire rope being 3 multiplying power does not exist in the prior art is solved, and meanwhile, the requirement for the tensile strength of a single wire rope can be reduced on the premise that the tension of the wire rope is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a lifting device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a fixed pulley in the lifting device according to the embodiment of the present invention.
Icon: 100-a lifting device; 110-a steel wire rope; 120-a movable pulley; 130-large pulley; 131-a first large pulley; 132-a second large sheave; 140-a fixed pulley; 150-a pulley yoke; 160-a mounting frame; 161-upper rib plate; 162-lower rib plate; 163-first mounting hole; 200-mast.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. The terms "disposed" and "connected" are to be construed broadly, e.g., as a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The rotary drilling rig is a construction machine suitable for hole forming operation in building foundation engineering. In the prior art, the lifting force of a steel wire rope of a common rotary drilling rig is 1 multiplying power or 4 multiplying power, but 3 multiplying power is not included. However, in the practical application process, a rotary drilling rig with a steel wire rope lifting force of 3 times is still needed.
Fig. 1 is a schematic structural diagram of a lifting device according to an embodiment of the present invention, and referring to fig. 1, the embodiment provides a lifting device 100, which is disposed on a rotary drilling rig and used for lifting a power head of the rotary drilling rig. The hoisting device 100 comprises a pulley assembly, a winch and a steel wire rope 110 extending out of the winch, one end of the steel wire rope 110 is connected with the winch, the other end of the steel wire rope 110 bypasses the pulley assembly and then is connected with a power head of the rotary drilling rig, and a winding drum for the winch winds the steel wire rope 110, so that the power head is hoisted. The pulley assembly comprises a movable pulley 120, a large pulley 130 and a fixed pulley 140 which are respectively arranged on a mast 200 of the rotary drilling rig, the fixed pulley 140 is positioned between the large pulley 130 and the movable pulley 120, and a steel wire rope 110 sequentially passes around the large pulley 130, the movable pulley 120 and the fixed pulley 140 and is then connected with the power head. The movable pulley 120 is used for being connected with a power head of the rotary drilling rig, the power head is driven to move through the steel wire rope 110, the steel wire rope 110 bypasses the movable pulley 120, so that two force application points are formed between the steel wire rope 110 and the power head by means of the movable pulley 120, and the two sections of steel wire ropes 110 respectively apply tension to the power head by means of the movable pulley 120. After the wire rope 110 finally rounds the fixed pulley 140, the tail end of the wire rope is connected with a power head of the rotary drilling rig to form a third force application point. The winding method of the steel wire rope 110 is different from winding methods of other steel wire ropes 110 with common multiplying powers in the prior art, three force application points are shared between the steel wire rope 110 and the power head, three sections of steel wire ropes 110 respectively apply tension to the power head on the three force application points, the tension borne by the steel wire rope 110 is only one third of the gravity borne by the power head, namely the lifting force of the steel wire rope 110 is 3 multiplying powers, the technical problem that a rotary drilling rig with the lifting force of the steel wire rope 110 being 3 multiplying powers does not exist in the prior art is solved, and meanwhile, the requirement for the tensile strength of a single steel wire rope 110 can be reduced on the premise that the tension of the steel wire.
It should be noted that, the connection manner of the first, large pulley 130 and the fixed pulley 140 and the mast 200 is not limited, and the first, large pulley 130 and the fixed pulley 140 may be directly connected or connected through other parts, as long as the large pulley 130 and the fixed pulley 140 can be rotated under the driving of the steel cable 110. Secondly, the connection mode of the movable pulley 120 for the power head of the rotary drilling rig is not limited, and the movable pulley 120 can be directly connected with the power head of the rotary drilling rig or connected with other parts as long as the movable pulley 120 can be driven by the steel wire rope 110 to rotate. Thirdly, the connection mode of the tail end of the steel wire rope 110 and the power head is not limited, and the steel wire rope can be directly connected, can also be connected through other parts, and can be fixedly connected or detachably connected. Fourth, the size and material of the large sheave 130, the movable sheave 120, the fixed sheave 140, and the wire rope 110 are not limited, but sufficient strength is secured.
In any of the above solutions, optionally, the large pulley 130 is rotatably connected to the mast 200 through a pulley frame 150, the pulley frame 150 forms a predetermined angle with the mast 200 and forms an accommodating space, and the mounting frame 160 of the fixed pulley 140 extends into the accommodating space and is fixed to the pulley frame 150 and the mast 200 respectively. Meanwhile, in order not to affect the winding and movement of the wire rope 110, the fixed sheave 140 is located outside the accommodating space. The lifting force of the wire rope 110 in the lifting device 100 has two multiplying factors, namely 3 multiplying factors and 1 multiplying factor.
Illustratively, the pulley yoke 150 is provided with a pin hole, and correspondingly, the mast 200 is also provided with a pin hole, and the pin shaft connects the pulley yoke 150 with the mast 200 through the pin hole, so that the pulley yoke 150 can rotate around the mast 200.
Referring to fig. 1, the large pulley 130 is rotatably connected to the mast 200 through the pulley frame 150, and when the lifting force of the cable 110 is required to be 3 times, the pulley frame 150 is rotated to form a predetermined angle between the pulley frame 150 and the mast 200 to form an accommodating space, and then the mounting frame 160 of the fixed pulley 140 is inserted into the accommodating space and fixed to the pulley frame 150 and the mast 200, respectively. At this time, the pulley assembly comprises a movable pulley 120, a large pulley 130 and a fixed pulley 140, the steel wire rope 110 sequentially passes around the large pulley 130, the movable pulley 120 and the fixed pulley 140, three force points are provided between the steel wire rope 110 and the power head, the force points are two force points formed by the steel wire rope 110 passing through the movable pulley 120 and one force point formed by the steel wire rope 110 directly connecting with the power head, three sections of the steel wire rope 110 exert pulling force on the power head on the three force points, the pulling force borne by the steel wire rope 110 is only one third of the gravity borne by the power head, namely, the lifting force of the steel wire rope 110 is 3 times.
Fig. 2 is a second structural schematic diagram of the lifting device according to the embodiment of the present invention, referring to fig. 2, when the lifting force of the cable 110 needs to be changed to 1-time, the fixing between the mounting bracket 160 of the fixed pulley 140 and the pulley bracket 150 and the mast 200 is released, the mounting bracket 160 of the fixed pulley 140 is removed, the pulley bracket 150 is driven to rotate towards the mast 200, the accommodating space between the pulley bracket 150 and the mast 200 no longer exists, then the pulley bracket 150 is fixed to the mast 200, and the movable pulley 120 connected to the power head is removed. At this time, the pulley assembly only includes the large pulley 130, the steel wire rope 110 is directly connected with the power head after bypassing the large pulley 130, there is only one force application point between the steel wire rope 110 and the power head, the pulling force applied to the steel wire rope 110 is equal to the gravity applied to the power head, that is, the lifting force of the steel wire rope 110 is 1 multiplying power.
The lifting force of the steel wire rope 110 in the lifting device 100 can be freely switched between 3 multiplying powers and 1 multiplying power, so that a 3-multiplying power CFA construction method (Continuous Flight Auger long-spiral drilling pipe pump pressure concrete pouring pile forming construction) can be realized, a standard rotary drilling rig construction method (1-multiplying power CFA construction method) can also be realized, and the device has great market competitiveness.
In any of the above technical solutions, optionally, the preset angle is 15 ° to 60 °.
The preset angle is 15 degrees to 60 degrees, so that the strength of the mounting frame 160 can be ensured, and the mounting frame 160 is conveniently connected with the pulley frame 150 and the mast 200. If the preset angle is too small, the accommodating space formed by the pulley frame 150 and the mast 200 is also small, and the size of the mounting frame 160 is small in order to be fixed by extending into the accommodating space, so that the strength of the mounting frame 160 is low and the mounting frame is not easy to fix. If the preset angle is too large, the inclination degree of the pulley frame 150 is too large, which is not favorable for fixing the pulley frame 150 itself and fixing the pulley frame 150, the mast 200 and the mounting frame 160.
Fig. 3 is a schematic structural diagram of a fixed pulley in a lifting device according to an embodiment of the present invention, please refer to fig. 3, in any of the above technical solutions, optionally, the mounting bracket 160 includes an upper rib plate 161 and a lower rib plate 162, and an included angle between the upper rib plate 161 and the lower rib plate 162 is equal to a preset angle, so that the mounting bracket 160 just extends into an accommodating space formed by the pulley yoke and the mast 200 and is fixed conveniently without swinging.
It should be noted that the connection mode of the upper rib plate 161 and the lower rib plate 162 is not limited, and the upper rib plate and the lower rib plate may be connected by a connecting member, or may be directly welded, as long as the included angle between the upper rib plate 161 and the lower rib plate 162 is not changed and is equal to the preset angle.
In any of the above technical solutions, optionally, the upper rib plate 161 and the pulley yoke 150 are correspondingly provided with first mounting holes 163, the first connecting member connects the upper rib plate 161 and the pulley yoke 150 through the first mounting holes 163, the lower rib plate 162 and the mast 200 are correspondingly provided with second mounting holes, and the second connecting member connects the lower rib plate 162 and the mast 200 through the second mounting holes.
Illustratively, the first mounting hole 163 and the second mounting hole are both through holes, the first connector includes a first bolt and a first nut, and the second connector includes a second bolt and a second nut; the first bolt penetrates through the upper rib plate 161 and the first mounting hole 163 on the pulley frame in sequence and then is in threaded fit with the first nut, so that the upper rib plate 161 and the pulley frame 150 are fixed; the second bolt penetrates through the lower rib plate 162 and the second mounting hole in the mast 200 in sequence and then is in threaded fit with the second nut, so that the lower rib plate 162 and the mast 200 are fixed; in order to improve the strength of the connection, the first mounting hole 163 and the second mounting hole may be plural, and the plural first mounting holes 163 and the plural second mounting holes realize plural fixing.
In order to allow the wire rope 110 to smoothly avoid the interference of the mast 200 and avoid the oversize of the large pulley 130, in any of the above solutions, the large pulley 130 may optionally include a first large pulley 131 and a second large pulley 132, the first large pulley 131 and the second large pulley 132 are located in the same plane, and the wire rope 110 sequentially passes around the first large pulley 131 and the second large pulley 132. By controlling the installation distance between the first and second large sheaves 131 and 132, both ends of the wire rope 110 passing around the first and second large sheaves 131 and 132 are positioned at both sides of the mast 200 without interfering with the mast 200. Compared with the arrangement of only a single large pulley 130, the arrangement of two large pulleys 130 (i.e., the first large pulley 131 and the second large pulley 132) can reduce the size of the large pulley 130, thereby reducing the cost and facilitating the installation.
Illustratively, the bottom surface of the sheave frame 150 is connected to the mast 200, the first and second large sheaves 131 and 132 are respectively installed at both ends of the top surface opposite to the bottom surface, the length of the top surface in the winding direction of the wire rope 110 is greater than that of the mast 200, the wire rope 110 extends from the winch and then sequentially passes around the first and second large sheaves 131 and 132, and the wire ropes 110 at both ends of the first and second large sheaves 131 and 132 are respectively located at both sides of the mast 200, so that the wire rope 110 does not interfere with the mast 200. The first large pulley 131 and the second large pulley 132 are located in the same plane, so that the steel wire rope 110 is not deflected in the winding process, and the obstruction of the first large pulley 131 and the second large pulley 132 to the reciprocating motion of the steel wire rope 110 can be reduced.
After the wire rope 110 passes around the second large pulley 132, the wire rope 110 continues to pass around the movable pulley 120, and also in order to reduce the obstruction of the movable pulley 120 to the reciprocating motion of the wire rope 110, in any of the above technical solutions, optionally, the movable pulley 120, the first large pulley 131 and the second large pulley 132 are located in the same plane, thereby ensuring that the wire rope 110 located between the first large pulley 131 and the movable pulley 120 is always located in the same plane, and reducing the resistance received by the wire rope 110, so that the motion of the wire rope 110 is more stable. Meanwhile, the component force of the pulling force provided by the steel wire rope 110 to the power head in the gravity direction of the power head is larger, and the heavier power head can be lifted on the premise that the pulling force provided by the steel wire rope 110 is not changed.
After the wire rope 110 passes around the movable pulley 120, the wire rope continues to pass around the fixed pulley 140, and then is connected with the power head, similarly, in order to reduce the obstruction of the fixed pulley 140 to the reciprocating motion of the wire rope 110 and improve the action effect of the tension of the wire rope 110, in any of the above technical solutions, optionally, the plane where the fixed pulley 140 is located is perpendicular to the plane where the movable pulley 120 is located.
The connection between the wire rope 110 and the power head may be in various manners, and in any one of the above technical solutions, optionally, a hook is disposed at one end of the wire rope 110 extending out of the winch.
For example, a lifting hook is arranged at one end of the steel wire rope 110 extending out of the winch, and correspondingly, a hanging ring matched with the lifting hook is arranged on the power head, and the lifting hook is hung on the hanging ring to fix the steel wire rope 110 and the power head. The lifting hook comprises a fixed part and a movable part, and the fixed part and the movable part jointly form a closed ring shape. The movable part is rotatably connected with the fixed part, and when the connection between the steel wire rope 110 and the power head needs to be released, the movable part is rotated to enable the hanging ring to be separated from the hanging hook.
The working principle of the lifting device 100 is:
the lifting device 100 is arranged on the rotary drilling rig and used for lifting a power head of the rotary drilling rig. The hoisting device 100 comprises a pulley assembly, a winch and a steel wire rope 110 extending out of the winch, one end of the steel wire rope 110 is connected with the winch, the other end of the steel wire rope 110 bypasses the pulley assembly and then is connected with a power head of the rotary drilling rig, and a winding drum for the winch winds the steel wire rope 110, so that the power head is hoisted. The pulley assembly comprises a movable pulley 120, a large pulley 130 and a fixed pulley 140 which are respectively arranged on a mast 200 of the rotary drilling rig, the fixed pulley 140 is positioned between the large pulley 130 and the movable pulley 120, and the steel wire rope 110 sequentially passes around the large pulley 130, the movable pulley 120 and the fixed pulley 140. The movable pulley 120 is used for being connected with a power head of the rotary drilling rig, the power head is driven to move through the steel wire rope 110, the steel wire rope 110 bypasses the movable pulley 120, so that two force application points are formed between the steel wire rope 110 and the power head by means of the movable pulley 120, and the two sections of steel wire ropes 110 respectively apply tension to the power head by means of the movable pulley 120. After the steel wire rope 110 finally bypasses the fixed pulley 140, the tail end of the steel wire rope 110 is connected with the power head to form a third force application point, at the moment, three force application points are arranged between the steel wire rope 110 and the power head, three sections of steel wire ropes 110 respectively apply tension to the power head on the three force application points, the tension borne by the steel wire rope 110 is only one third of the gravity borne by the power head, namely the lifting force of the steel wire rope 110 is 3 multiplying power, the technical problem that a rotary drilling rig with the lifting force of the steel wire rope 110 being 3 multiplying power does not exist in the prior art is solved, and meanwhile, the requirement for the tensile strength of a single steel wire rope 110 can be reduced on the premise.
The embodiment also provides a rotary drilling rig, which comprises a mast 200, a power head and any one of the lifting devices 100, wherein the lifting device 100 comprises a large pulley 130 and a fixed pulley 140, the large pulley 130 and the fixed pulley 140 are respectively connected with the mast 200, the power head is positioned at the side of the mast 200, and the movable pulley 120 is connected with the power head. The rotary drilling rig can realize a 3-multiplying-power CFA construction method, and has low requirement on the tensile strength of a single steel wire rope 110. In addition, the rotary drilling rig can also realize free switching between a CFA construction method and a standard rotary drilling construction method, realizes dual purposes of one machine and has great market competitiveness.
Illustratively, the mast 200 is vertically disposed, the large pulley 130 is disposed at the top end of the mast 200, the movable pulley 120 is connected to the power head and disposed on the same side of the mast 200 as the fixed pulley 140, and the fixed pulley 140 is disposed between the large pulley 130 and the movable pulley 120. After extending out of the winch, the wire rope 110 sequentially passes around the large pulley 130, the movable pulley 120 and the fixed pulley 140 and is connected with the power head. The winding method of the steel wire rope 110 is different from winding methods of other steel wire ropes 110 with common multiplying power in the prior art, and a 3-multiplying power CFA construction method can be realized.
When the power head of the rotary drilling rig needs to be lifted, the steel wire rope 110 is wound by the winding, so that the length of the steel wire rope 110 wound on the pulley assembly is shortened, namely the lengths of three sections of steel wire ropes 110 applying pulling force to the power head are shortened. The movable pulley 120 moves upward under the action of the steel wire rope 110, and then drives the power head to move upward, meanwhile, the tail end of the steel wire rope 110 also pulls the power head to move upward, and the three sections of steel wire ropes 110 respectively apply tension to the power head at three force application points and pull the power head upward at the same time.
When the power head of the rotary drilling rig needs to be lowered, the winch discharges the steel wire rope 110, so that the length of the steel wire rope 110 wound on the pulley assembly is lengthened, namely the length of three sections of steel wire ropes 110 applying pulling force to the power head is lengthened. The movable pulley 120 moves downward under the action of the steel wire rope 110, and then drives the power head to move downward, and meanwhile, the tail end of the steel wire rope 110 also drives the power head to move downward.
The tensile force borne by the steel wire rope 110 in the rotary drilling rig is only one third of the gravity borne by the power head, namely the lifting force of the steel wire rope 110 is 3 multiplying power, the technical problem that the rotary drilling rig with the lifting force of the steel wire rope 110 being 3 multiplying power does not exist in the prior art is solved, and meanwhile, the requirement for the tensile strength of the single steel wire rope 110 can be reduced on the premise that the tensile force of the steel wire rope 110 is guaranteed.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a lifting device, sets up on digging the rig soon, its characterized in that, includes loose pulley assembly, hoist and follow the wire rope that the hoist stretches out, loose pulley assembly includes the movable pulley and sets up respectively big pulley and fixed pulley on digging the mast of rig soon, the fixed pulley is located big pulley with between the movable pulley, wire rope walks around in proper order big pulley the movable pulley with behind the fixed pulley, with dig the unit head connection of rig soon, the movable pulley be used for with the unit head is connected, and passes through wire rope drives the unit head motion.
2. The lifting device as claimed in claim 1, wherein the large pulley is rotatably connected to the mast via a pulley holder, the pulley holder forms a predetermined angle with the mast and forms an accommodating space, a mounting bracket of the fixed pulley extends into the accommodating space and is fixed to the pulley holder and the mast, respectively, and the fixed pulley is located outside the accommodating space.
3. A lifting device as claimed in claim 2, characterized in that the predetermined angle is 15 ° to 60 °.
4. The lifting device according to claim 2, wherein the mounting bracket comprises an upper rib and a lower rib, and an included angle between the upper rib and the lower rib is equal to the preset angle.
5. The lifting device according to claim 4, wherein first mounting holes are correspondingly formed in the upper rib plate and the pulley yoke, a first connecting piece connects the upper rib plate with the pulley yoke through the first mounting holes, second mounting holes are correspondingly formed in the lower rib plate and the mast, and the second connecting piece connects the lower rib plate with the mast through the second mounting holes.
6. The hoisting device of claim 1 wherein the large sheave comprises a first large sheave and a second large sheave, the first large sheave and the second large sheave being located in the same plane, the wire rope passing around the first large sheave and the second large sheave in sequence.
7. The lifting device of claim 6, wherein the movable sheave is located in the same plane as the first and second large sheaves.
8. The lifting device as recited in claim 7, wherein the plane of the fixed sheave is perpendicular to the plane of the movable sheave.
9. The hoisting device of claim 1 wherein the end of the wire rope extending beyond the hoist is provided with a hook.
10. A rotary drilling rig, characterized by comprising a mast, a power head and the lifting device of any one of claims 1-9, wherein the lifting device comprises a large pulley and a fixed pulley, the large pulley and the fixed pulley are respectively connected with the mast, the power head is positioned at the side of the mast, and the movable pulley is connected with the power head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482490.9A CN111483932A (en) | 2020-05-31 | 2020-05-31 | Lifting device and rotary drilling rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010482490.9A CN111483932A (en) | 2020-05-31 | 2020-05-31 | Lifting device and rotary drilling rig |
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| Publication Number | Publication Date |
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| CN111483932A true CN111483932A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010482490.9A Pending CN111483932A (en) | 2020-05-31 | 2020-05-31 | Lifting device and rotary drilling rig |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412385A (en) * | 2022-01-25 | 2022-04-29 | 北京三一智造科技有限公司 | Pressure device and rotary drilling rig |
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2020
- 2020-05-31 CN CN202010482490.9A patent/CN111483932A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412385A (en) * | 2022-01-25 | 2022-04-29 | 北京三一智造科技有限公司 | Pressure device and rotary drilling rig |
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