CN216553817U - Pulley block device of drilling machine for pile foundation construction - Google Patents

Abstract

The utility model discloses a pulley block device of a drilling machine for pile foundation construction, wherein each pulley bracket adopts a hinge four-bar mechanism, and two ends of each pulley bracket are hinged on a rotating device fixedly connected to the top end of a mast; one end of each pulley support is rotatably connected with a first outer upper pulley and a first inner lower pulley, the other end of each pulley support is rotatably connected with a second outer upper pulley and a second inner lower pulley, one end of a steel wire rope is fixed with one end of each pulley support, the steel wire rope winds the first inner lower pulley at one end, the second inner lower pulley at the other end, a suspension pulley rotatably connected with a tractor at the top of a drill rod, winds the second outer upper pulley at the other end, and is connected with a hoisting wheel of a hoisting machine after the first outer upper pulley at one end. The pulley block device has good mechanical properties of shearing resistance, bending resistance and eccentric force resistance, and relatively reduces the volume and weight of the pulley block device.

Description

Pulley block device of drilling machine for pile foundation construction

Technical Field

The utility model relates to the technical field of construction pile foundation construction equipment, in particular to a pulley block device of a drilling machine for pile foundation construction.

Background

In the technical field of construction equipment for pile foundations, drilling machines for pile foundation construction are various in types and different in structure. In recent years, it is well known that the lower the center of gravity of the drilling machine during construction, the higher the safety of drilling construction of the drilling machine.

In view of the above recognition, many engineers focus on reducing the mast height as much as possible to solve the technical problem. The applicant solves the technical problems from other angles and provides a new technical scheme, a central hole of a power head is a polygonal hole such as a regular hexagon, the cross section of a drill rod used in cooperation is a polygonal shape such as a regular hexagon, the power head is driven by a hoisting system to slide up and down only in the lower half section of a mast, the drill rod can be inserted into the central hole of the power head from the top of the power head to slide axially relatively and limit the drill rod axially at a preset position, after a single drill rod is drilled to a preset depth, the drill rod is continuously connected to a construction platform and continuously drilled, and therefore the drilling operation of the whole length of a pile hole is completed. Therefore, the gravity center of the drilling machine in the construction process can be well reduced, and the safety of drilling construction of the drilling machine can be greatly improved.

As a matching structure, a plurality of groups of pulley blocks are required to be arranged at the top of the mast, each group of pulley blocks is respectively supported on respective pulley supports, the pulley supports are connected on a rotating device fixedly connected to the top end of the mast, and a drill rod can be suspended on each group of pulley blocks to be rotated right above a center hole of the power head and then connected.

The prior art sheave bracket cannot be used in the above-described drilling machine because the prior art sheave bracket has the following disadvantages: 1. under more circumstances, the drilling machine has the advantages that other drill rods are suspended on respective pulley blocks all the time except the drill rods which are drilling down, the requirement on the stress capacity of the pulley support is high due to the vibration force in the drilling down process, the pulley support in the prior art adopts the goose-head-shaped plate type frame, the mechanical properties such as shearing resistance, bending resistance and eccentric force cannot completely meet the requirements, the potential safety hazard of cracking and even breaking exists, if the size of the goose-head-shaped plate type frame is increased to meet the mechanical requirements, the defect of high gravity center is overcome, and the potential safety hazard also exists. 2. The drill rig requires that the drill rod for continuous connection is firmly suspended and always in a vertical state, and flexibly and stably ascends and descends so as to be convenient for being accurately inserted into a hole or quickly and flexibly hung back after being rotated right above a center hole of the power head, and the goose-head-shaped plate type frame in the prior art does not have a space for installing a structure for realizing the function. 3. The drilling machine requires that a plurality of groups of pulley supports and steel wire ropes connected with each group of pulley blocks in series are arranged in a crossed mode along the circumference of the rotating device, but the goose-head-shaped plate type pulley support in the prior art does not have a space for the plurality of groups of pulley supports and the steel wire ropes to be staggered mutually. 4. The accuracy of the rotation of the rotating device is yet to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a pulley block device for a pile foundation construction drilling machine, which has better mechanical properties of shearing force resistance, bending force resistance and eccentric force resistance and relatively reduces the volume and weight of the pulley block device.

The technical scheme of the utility model is that a pulley block device for a pile foundation construction drilling machine is provided, which comprises a plurality of groups of pulley blocks supported on respective pulley supports, wherein each group of pulley blocks is used for suspending a drill rod; each pulley bracket adopts a hinge four-bar mechanism, and two ends of each pulley bracket are hinged on a rotating device fixedly connected to the top end of the mast; one end of each pulley support is rotatably connected with a first outer upper pulley and a first inner lower pulley, the other end of each pulley support is rotatably connected with a second outer upper pulley and a second inner lower pulley, one end of a steel wire rope is fixed with one end of each pulley support, the steel wire rope winds the first inner lower pulley at one end, the second inner lower pulley at the other end, a suspension pulley rotatably connected with a tractor at the top of a drill rod, winds the second outer upper pulley at the other end, and is connected with a hoisting wheel of a hoisting machine after the first outer upper pulley at one end.

After adopting the structure, the pulley block device for the pile foundation construction drilling machine has the following advantages: because each pulley bracket adopts a hinge four-bar mechanism, and the two ends of each pulley bracket are hinged on the rotating device fixedly connected with the top end of the mast, the hinging characteristic is fully utilized, the pulley block device has excellent mechanical properties of shearing resistance, bending resistance and eccentric force resistance, can completely meet the requirements of the stress capacity of continuous connection of the drill rod for suspension all the time and vibration in the drilling process of a drilling machine, and avoids the potential safety hazard of cracking and even breaking of the goose-head-shaped plate type frame in the prior art; and because of the excellent mechanical property of the four-bar mechanism, under the same bearing force, the size of the four-bar mechanism can be greatly reduced relative to the goose-head-shaped plate pulley support, the weight of the four-bar mechanism is greatly reduced relative to the goose-head-shaped plate pulley support, the technical requirement of low gravity center of the drilling machine is completely met, and the potential safety hazard caused by high and unstable gravity center of the drilling machine is also avoided. And because the hinged four-bar mechanism is adopted, the installation of the suspension pulley rotationally connected with the tractor at the top of the drill rod and the reasonable winding of the steel wire rope provide the installation structural space, the continuous drill rod is ensured to be suspended firmly and always in a vertical state and flexibly and stably ascended and descended, and the continuous drill rod can be accurately and flexibly hung in a hole or quickly and reversely hung after rotating right above the center hole of the power head.

Further, each pulley bracket comprises a first side link, a connecting rod and a second side link; the first connecting frame rod comprises a first lower connecting frame rod and a first upper connecting frame rod, the inner lower end of the first lower connecting frame rod is hinged with the lower end of one side of the circular rotating drum of the rotating device, the outer upper end of the first lower connecting frame rod is connected with one end of the connecting rod, the inner lower end of the first upper connecting frame rod is hinged with the upper end of one side of the circular rotating drum of the rotating device, and the outer upper end of the first upper connecting frame rod is also connected with one end of the connecting rod; the other end of the connecting rod is connected with the outer upper end of the second side link; the inner lower end of the second side link is hinged with the upper end of one side of the circular rotating drum. After the structure is adopted, the first connecting rod, the second connecting rod and the circular rotary drum of the rotating device form a stable and reliable hinge four-bar mechanism, and the force of the continuous connecting drill rod suspended on each group of pulley blocks is symmetrically applied to the circular rotary drum of the rotating device through the first lower connecting rod, the first upper connecting rod and the second connecting rod, so that the excellent mechanical property is further ensured, the mechanical properties of shearing resistance, bending resistance and eccentric force resistance of the pulley block device are further improved, the size of the pulley support is further reduced, the weight of the pulley support is further lightened, and the technical effects of avoiding the cracking and even breaking of the pulley support and avoiding potential safety hazards caused by instability of the center of gravity are more prominent and obvious.

Further, the diameters of the first inner lower pulley and the second inner lower pulley are smaller than the diameters of the first outer upper pulley and the second outer upper pulley, and the diameter of the suspension pulley is equal to the diameters of the first outer upper pulley and the second outer upper pulley. With the above structure, the first inner lower pulley and the second inner lower pulley belong to the stationary end pulley of the steel wire rope, and the stress is much smaller than that of the first outer upper pulley, the second outer upper pulley and the suspension pulley, so the diameters of the first inner lower pulley and the second inner lower pulley are smaller than those of the first outer upper pulley, the second outer upper pulley and the suspension pulley, and the diameters of the first inner lower pulley and the second inner lower pulley are half of those of the first outer upper pulley and the second outer upper pulley and the suspension pulley. Therefore, the requirement of stress on the pulley block is met, and the size and the weight of the pulley block are relatively reduced.

Furthermore, the first lower side link is one, and one end of the steel wire rope penetrates through a through hole of the first lower side link and is fixedly connected with the middle of the first lower side link through a steel wire ball; the number of the first upper connecting frame rods is two, a first pin shaft is fixedly connected between the two first upper connecting frame rods, and a first inner lower sliding wheel positioned in a gap between the two first upper connecting frame rods is in sliding fit with the first pin shaft; the outer upper ends of the two first upper connecting frame rods are fixedly connected with a regular triangle plate respectively, the inner lower corners of the two regular triangle plates are hinged with the outer upper ends of the respective first lower connecting frame rods, the outer corners of the two regular triangle plates are fixedly connected with a second pin shaft, and the first inner upper pulleys positioned in the gaps of the two regular triangle plates are in sliding fit with the second pin shaft; one end of the connecting rod is hinged with the inner upper corners of the two regular triangular plates; the number of the second side link rods is two, a third pin shaft is fixedly connected between the two second side link rods, and a second inner lower sliding wheel positioned in a gap between the two second side link rods is in sliding fit with the third pin shaft; the outer upper ends of the two second connecting frame rods are fixedly connected with the inner lower corners of the two irregular triangular plates respectively, the inner upper corners of the two irregular triangular plates are hinged with the other end of the connecting rod, the outer corners of the two irregular triangular plates are fixedly connected with a fourth pin shaft, and the second outer upper pulleys are rotatably matched on the fourth pin shaft. After the structure is adopted, the pulley is stressed and then is transmitted to the pin shaft and then is transmitted to the circular rotary drum through the rod or the ear plate, the structure ensures that the pulley block device has the excellent mechanical property, and provides sufficient and reasonable installation and connection space for the suspension pulley and the connected steel wire rope, the first inner lower pulley, the second inner lower pulley, the first outer upper pulley, the second outer upper pulley and the connected steel wire rope, and the structure has firm connection, reasonable layout and flexible, stable and reliable working process.

Furthermore, the pulley supports provided with the pulley blocks are three, the overlooking projection line of the width bisector of each pulley support coincides with a diameter line of the circular rotary drum of the rotating device, the included angles of the width bisectors of two adjacent pulley supports are 60 degrees, the heights of the connecting rods of the three pulley supports are different and are distributed in a pressing mode, a middle mode and an upper mode, and each connecting rod inclines from the first outer upper pulley end to the second outer upper pulley end from bottom to top. After the structure is adopted, the three pulley supports are reasonable in layout and balanced in stress along the circumference of the circular rotary drum, the three pulley supports are clear in level on the height level, the rods of the three pulley supports and the steel wire ropes are staggered and do not interfere with each other, the stress of each pulley support is symmetrically applied to the circular rotary drum, the pulley block device is guaranteed to have the excellent mechanical property, and sufficient and reasonable installation and connection spaces are provided for the suspension pulleys and the connected steel wire ropes, the first inner lower pulley, the second inner lower pulley, the first outer upper pulley, the second outer upper pulley and the connected steel wire ropes.

The pulley block device for the pile foundation construction drilling machine further comprises a plurality of auxiliary frames fixedly connected with the tractor, each auxiliary frame is provided with an inner hole for the drill rod to penetrate through and accommodate the tractor, each auxiliary frame is in sliding fit with a pair of first sliding rails fixedly connected to the circular rotating drum through a plurality of row claws, the mast is further provided with two second sliding rails which are arranged on the same vertical line and are in transition and downward or upward sliding fit with the auxiliary frames of the tractor connected with the continuous drill rod when the continuous drill rod is positioned right above the center hole of the power head, and the two second sliding rails are fixedly connected to the mast above the lower half section. After the structure is adopted, the auxiliary frame fixedly connected with the tractor can rotate along the circumference along with the circular rotary drum and drives the drill rod to horizontally rotate along the axis of the mast and vertically slide along the first slide rail and the second slide rail, so that the suspended drill rod in a vertical state can parallelly and stably move along an arc when rotating along with the circular rotary drum of the rotating device, and meanwhile, the drill rod slides up and down along the slide rails to run stably, so that potential safety hazards caused by instability of a drilling machine can be avoided, and the next step of ensuring that the drill rod is aligned with a center hole of the power head is provided.

Further, the pulley block device for the pile foundation construction drilling machine further comprises a rotary encoder and a main controller, wherein the rotary encoder is installed on the circular rotary drum and used for controlling the rotation angle of the rotary drum, and the rotary encoder is electrically connected with the main controller. After the structure is adopted, the rotation angle of the drill rod for continuous connection can be accurately controlled, the guarantee is provided for the drill rod to align the center hole of the power head on the next step, time and labor are saved, and the construction efficiency is improved.

Further, the hinge structure of the lower extreme of the interior lower extreme of a first side of the side of linking frame and the lower extreme of circular drum one side, the hinge structure of the interior lower extreme of two first upper side of linking frame and the upper end of circular drum one side, the hinge structure of the interior lower extreme of two second side of linking frame and the upper end of circular drum opposite side, all adopt the otic placode that links firmly on the circular drum and link firmly the connecting block of lower extreme in the linking frame, establish a plurality of pinholes of the coaxial line on otic placode and connecting block and the hinge structure of activity grafting in a plurality of pinholes and both ends axial spacing hinge pin. After the three side link rods adopt the specific structure, the stressed rods are transmitted to the pin shaft, the pin shaft and the lug plate to be transmitted to the circular rotary drum, and the structure further ensures that the pulley block device has the excellent mechanical property, and the structure is firm in connection, reasonable in layout and flexible, stable and reliable in working process.

Furthermore, the hinge structure of the outer upper end of the first lower side link and the inner lower corners of the two regular triangular plates is that two connecting blocks are arranged at the outer upper end of the first lower side link, four pin holes with the same axis are arranged on the inner lower corners of the two regular triangular plates and the two connecting blocks, and a hinge pin is movably inserted in the four pin holes and axially limited at the two ends. After the first outer upper end is hinged with the inner lower corners of the two regular triangular plates by adopting the specific structure, the stress of the inner lower corners of the regular triangular plates is transmitted to the pin shaft, and then the pin shaft is transmitted to the circular rotating drum through the first lower connecting frame rod, the pin shaft and the lug plate.

Furthermore, the hinge structure of one end of the connecting rod and the inner upper corners of the two regular triangular plates is that four pin holes which are coaxial are arranged on the two connecting blocks at one end of the connecting rod and the inner upper corners of the two regular triangular plates at the two sides, and a hinge pin is movably inserted in the four pin holes and axially limits the two ends; the other end of the connecting rod is hinged with the inner upper corners of the two irregular triangular plates, the two connecting blocks at the other end of the connecting rod and the inner upper corners of the two irregular triangular plates at two sides are provided with four pin holes with the same axis, and a hinge pin is movably inserted in the four pin holes and axially limited at two ends. After the two ends of the connecting rod are hinged with the inner upper corners of the two triangular plates by adopting the specific structure, the stress of the pin shaft is transmitted to the first lower connecting frame rod and the first upper connecting frame rod through the respective triangular plates, and the respective pin shaft and the respective ear plate are transmitted to the circular rotating drum.

Drawings

Fig. 1 is a schematic perspective view of a drilling rig equipped with the pulley block arrangement of the present invention.

Fig. 2 is an enlarged structure schematic diagram of a, namely a pulley block device in fig. 1, which is arranged on a drilling machine.

Fig. 3 is a schematic front view of the pulley block assembly of the present invention (three auxiliary frames and hinge pins are not shown).

Fig. 4 is a schematic top view of the pulley block assembly of the present invention (three auxiliary frames and pins are not shown).

Fig. 5 is a schematic view showing a set of pulley blocks and a pulley frame connected to a circular drum of a rotating device according to the present invention (hinge pin is not shown).

Fig. 6 is a second schematic structural view (hinge pin not shown) showing a set of pulley blocks and a pulley yoke connected to a circular drum of a rotating device according to the present invention.

Fig. 7 is a third schematic structural view (hinge pin not shown) showing a set of pulley blocks and a pulley yoke connected to a circular drum of a rotating device in the present invention.

Fig. 8 is a third schematic view (hinge pin not shown) showing the structure of a set of pulley blocks and a pulley yoke connected to the circular drum of the rotating device according to the present invention.

Shown in the figure: 1. a mast, 2, an inclined support, 3, a winch, 4, a construction platform, 5, a crawler traveling mechanism, 6, an operation room, 7, a balancing weight, 8, a power head, 9, a drill rod, 10, a pulley block, 11, a steel wire rope, 12, a bolt hole of a tractor, 13, the tractor, 14, an inner hole, 15, an auxiliary frame, 16, a pulley bracket, 17, a rotating device, 18, a steel wire ball, 19, an oil cylinder seat, 20, a circular rotating drum, 21, an irregular triangular plate inner lower corner, 22, a pin hole, 23, an irregular triangular plate outer corner, 24, a second outer upper pulley, 25, an irregular triangular plate, 26, an irregular triangular plate inner upper corner, 27, a second inner lower pulley, 28, a connecting rod, 29, a regular triangular plate inner upper corner, 30, a first inner lower pulley, 31, a first outer upper pulley, 32, a regular triangular plate outer corner, 33, a regular triangular plate, 34, a regular triangular plate inner lower corner, 35. the inner side of the regular triangle plate is 36, the first lower connecting rod is 37, the first upper connecting rod is 38, the lug plate is 39, the connecting block is 40, the second connecting rod is 41, the suspension pulley is 42 and the connecting block is connected.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It is to be noted that the description of the embodiments is provided to aid understanding of the present invention, and is not intended to limit the present invention. In addition, the technical means involved in the respective embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8.

The drilling machine provided with the pulley block device and used for pile foundation construction comprises a crawler traveling mechanism 5, a construction platform 4, a mast 1 fixed on the construction platform 4, an inclined support 2 supporting the mast 1, an operation chamber 6 fixed on the construction platform 4, a balancing weight 7, a plurality of winches 3 and the like. The lower half section of the mast 1 is provided with a slide rail, the slide rail is in sliding fit with a power head 8, and the power head 8 is driven to move up and down by a single hoisting mechanism 3. The top of the mast 1 is fixedly connected with a rotating device 17, if the top of the mast 1 is coaxially welded with an oil cylinder seat 19, a rotating oil cylinder is rotatably connected with the oil cylinder seat 19, the rotating oil cylinder is arranged in a circular rotating cylinder 20, and the rotating oil cylinder and the circular rotating cylinder 20 are mutually and fixedly connected like welding. The pulley block device is connected with a round rotary drum 20 which is hinged on a rotating device 17 such as the rotating device 17 by a pin shaft. The mast 1 is also called a column. The construction platform 4 is also called a working platform or an operation platform, or called a base or a chassis, and the slide rail is also called a guide rail or a track. The slide rails are indicated here and in the figures of the first slide rail and the second slide rail described below.

The pulley block device of the drilling machine for pile foundation construction comprises a plurality of groups of pulley blocks 10 supported on respective pulley supports 16, and each group of pulley blocks 10 is used for suspending a drill rod. The pulley support 16 is also called a pulley frame, or a pulley support frame, or a crown block.

Each pulley bracket 16 adopts a four-bar hinge mechanism, and two ends of each pulley bracket 16 are hinged on a rotating device 17 fixedly connected to the top end of the mast 1. One end of each pulley bracket 16 is rotatably connected with a first outer upper pulley 31 and a first inner lower pulley 30, the other end of each pulley bracket 16 is rotatably connected with a second outer upper pulley 24 and a second inner lower pulley 27, one end of a steel wire rope 11 is fixed with one end of the pulley bracket 16, the steel wire rope 11 is wound around the first inner lower pulley 30 at one end, the second inner lower pulley 27 at the other end, a suspension pulley 41 rotatably connected with a tractor 13 at the top of a drill rod 9, the second outer upper pulley 24 at the other end, the first outer upper pulley 31 at one end, and the other end of the steel wire rope 11 is connected with a hoisting pulley of a hoisting machine 3. After the central hole of the suspension pulley 41 is aligned with the bolt holes 12 of the two tractors, a bolt (not shown in the figure) is movably inserted in the central hole of the suspension pulley 41 and the bolt holes 12 of the two tractors and axially limited, for example, one end of the bolt is provided with a shaft shoulder, namely a round big head, the other end is provided with a radial jack, and an open pin is inserted in the radial jack to axially limit. The tractor 13 and the connected drill rod 9 are lifted by the winch through the steel wire rope 11, and the tractor 13 and the connected drill rod 9 or the independent tractor 13 are descended, so that after the steel wire rope 11 is released by the winch, the tractor 13 and the connected drill rod 9 or the independent tractor 13 are descended under the self weight of the tractor 13 and the connected drill rod 9 or the independent self weight of the tractor 13. Tractor 13 may employ a commercially available swivel joint.

Each pulley carriage 16 includes a first side link, a connecting rod 28 and a second side link 40. The first side link comprises a first lower side link 36 and a first upper side link 37. The inner lower end of the first lower side link 36 is hinged with the lower end of one side of the circular drum 20 of the rotating device 17, the outer upper end of the first lower side link 36 is connected with one end of the connecting rod 28, the inner lower end of the first upper side link 37 is hinged with the upper end of one side of the circular drum 20 of the rotating device 17, and the outer upper end of the first upper side link 37 is connected with one end of the connecting rod 28. The other end of the connecting rod 28 is connected with the outer upper end of the second side link 40. The inner lower end of the second side link 40 is hinged with the upper end of one side of the circular drum 20.

The diameters of the first inner lower sheave 30 and the second inner lower sheave 27 are smaller than the diameters of the first outer upper sheave 31 and the second outer upper sheave 24, and the diameter of the hanger sheave 41 is equal to the diameters of the first outer upper sheave 31 and the second outer upper sheave 24. It will be understood that the diameters of the first outer upper sheave 31 and the second outer upper sheave 24 are equal.

The first lower side link 36 is one, and one end of the steel wire rope 11 passes through a through hole of the first lower side link 36 and is fixedly connected with the middle of the first lower side link 36 through a steel wire ball 18, such as welding. The wire ball 18 is also called a ball head.

The number of the first upper connecting frame rods 37 is two, a first pin (all pin shafts including the first pin shaft are not shown in the figures, and the same applies hereinafter) is fixedly connected between the two first upper connecting frame rods 37, and the first inner lower pulley 30 located in the gap between the two first upper connecting frame rods 37 is rotatably matched on the first pin. The outer upper ends of the two first upper connecting frame rods 37 are fixedly connected with a regular triangular plate 33 in a welding mode respectively, and if the outer upper ends of the two first upper connecting frame rods 37 are welded with a transverse plate, the transverse plate is welded with the inner side 35 of the regular triangular plate. The inner lower corners 34 of the regular triangle plates are hinged with the outer upper ends of the respective first lower connecting frame rods 36, the outer corners 32 of the two regular triangle plates are fixedly connected with a second pin shaft through welding, and the first inner lower pulleys 30 positioned in the gap between the two regular triangle plates are in running fit with the second pin shaft. One connecting rod 28 is provided, and one end of the connecting rod 28 is hinged with the inner upper corners 29 of the two regular triangle plates.

The number of the second side link 40 is two, a third pin shaft is fixedly connected between the two second side link 40, and a second inner lower pulley 27 positioned in the gap between the two second side link 40 is rotatably matched on the third pin shaft. The outer upper ends of the two second connecting frame rods 40 are fixedly connected with the inner lower corners 21 of the two irregular triangular plates respectively, if welded, the inner upper corners 26 of the two irregular triangular plates are hinged with the other end of the connecting rod 28, the outer corners 23 of the two irregular triangular plates are fixedly connected with the fourth pin shaft if welded, and the second outer upper pulleys 24 are rotatably matched on the fourth pin shaft. It can also be said that the two irregular triangular plates 25 are fixedly connected with the upper end of the second side link 40, and are fixedly connected with a fourth pin shaft, and are also hinged with one end of the connecting rod 28.

The pulley supports 16 provided with the pulley blocks 10 are three, referring to fig. 4, the top projection line of the width bisector of each pulley support 16 coincides with a diameter line of the circular rotary drum 20 of the rotating device 17, the included angle of the width bisector of two adjacent pulley supports 16 is 60 degrees, referring to fig. 3, the connecting rods of the three pulley supports 16 are different in height and are distributed in a pressing, middle and upper mode, and each connecting rod 28 inclines from the end of the first outer upper pulley 31 to the end of the second outer upper pulley 24 from bottom to top.

The pulley block device for the pile foundation construction drilling machine further comprises a plurality of auxiliary frames 15 fixedly connected with the tractor 13, each auxiliary frame 15 is provided with an inner hole 14 for the drill rod 9 to pass through and accommodate the tractor 13, each auxiliary frame 15 is in sliding fit with a respective pair of first slide rails fixedly connected on the circular rotary drum 20 through a plurality of row claws, the mast 1 is further provided with two second slide rails which are positioned on the same vertical line with the first slide rails and are used for transition and downward or upward sliding fit with the auxiliary frames 15 connected with the tractor 13 of the continuous drill rod 9 when the continuous drill rod 9 is positioned right above a central hole of the power head 8, and the two second slide rails are fixedly connected on the mast 1 above the lower half section or fixedly connected on the mast 1 of the upper half section (the two slide rails of the row claws and the upper half part of the drill rod are not shown in the figure). The auxiliary frame 15 is fixedly connected to the tractor 13, and if the tractor 13 uses a swivel joint, the auxiliary frame is fixedly connected to a fixed portion of the swivel joint, for example, by screwing a connecting plate 42 and a screw (not shown in the drawing) or by welding the connecting plate 42 to the auxiliary frame and the fixed portion of the tractor.

The pulley block device for the drilling machine for pile foundation construction further comprises a rotary encoder and a main controller, wherein the rotary encoder is installed on the circular rotary drum 20 and used for controlling the rotation angle of the circular rotary drum 20, and the rotary encoder is electrically connected with the main controller. The main controller adopts a CPU, a PLC programming controller or an MCU and the like. The main controller may be installed in a control box of the operator's room 6. Neither the main controller nor the rotary encoder diagram is shown. The main controller and the rotary encoder are commercially available. Rotary encoders are also known as rotary encoders.

The hinge structure of the inner lower end of a first lower connecting rod 36 and the lower end of one side of the circular drum 20, the hinge structure of the inner lower end of two first upper connecting rods 37 and the upper end of one side of the circular drum 20, and the hinge structure of the inner lower end of two second connecting rods 40 and the upper end of the other side of the circular drum 20 all adopt a lug plate 38 fixedly connected on the circular drum 20, a connecting block 39 fixedly connected at the inner lower end of the connecting rod, a plurality of coaxial pin holes 22 arranged on the lug plate 38 and the connecting block 39, and a hinge structure of a hinge pin movably inserted in the plurality of pin holes 22 and axially limited at two ends (all hinge pins are not shown in the figures). The structure of the section is developed and spoken:

the concrete structure of the hinge joint of the inner lower end of a first lower side link 36 and the lower end of one side of the circular rotary drum 20 can be, the inner lower end of the first lower side link 36 is fixedly connected with two connecting blocks 39 if welded, the lower end of one side of the circular rotary drum 20 is fixedly connected with two lug plates 38 if welded, the two lug plates 38 are outside, the two connecting plates 39 are inside, the two lug plates 38 and the two connecting blocks 39 are provided with four coaxial pin holes 22, a hinge pin is movably inserted in the four pin holes 22, the two ends of the hinge pin are axially limited if adopting a bolt and nut structure to be axially limited, one end of the hinge pin can be a shaft shoulder, the other end of the hinge pin is provided with a radial hole, and the radial hole is internally provided with a split pin and is axially limited.

The concrete structure of the hinge joint of the inner lower ends of the two first upper connecting rods 37 and the upper end of one side of the circular rotary drum 20 can be that the inner lower ends of the two first upper connecting rods 37 are fixedly connected with two connecting blocks 39 if welded, the upper end of one side of the circular rotary drum 20 is fixedly connected with two lug plates 38 if welded, the two lug plates 38 are arranged in, the two connecting plates 39 are arranged outside, the two lug plates 38 and the two connecting blocks 39 are provided with four pin holes 22 which are coaxial, one hinge pin is movably inserted into the four pin holes 22, and the two ends of the hinge pin are axially limited. The concrete structure of the hinge joint of the inner lower ends of the two second side link rods 40 and the upper end of the other side of the circular rotary drum 20 can be that the inner lower ends of the two second side link rods 40 are fixedly connected with two connecting blocks 39 if welded, the upper end of the other side of the circular rotary drum 20 is fixedly connected with two lug plates 38 if welded, the two lug plates 38 are arranged in, the two connecting plates 39 are arranged outside, the two lug plates 38 and the two connecting blocks 39 are provided with four coaxial pin holes 22, one hinge pin is movably inserted in the four pin holes 22, and the two ends of the hinge pin are axially limited.

The concrete structure of the hinge joint of the outer upper end of the first lower side link 36 and the inner lower corners 34 of the two regular triangle plates can be that two connecting blocks 39 are arranged at the outer upper end of the first lower side link 36, four coaxial pin holes 22 are arranged on the inner lower corners 34 of the two regular triangle plates and the two connecting blocks 39, and a hinge pin is movably inserted in the four pin holes 22 and axially limited at two ends.

The concrete structure of the hinge joint between one end of the connecting rod 28 and the inner upper corners 29 of the two regular triangle plates can be that the two connecting blocks 39 at one end of the connecting rod 28 and the inner upper corners 29 of the two regular triangle plates at two sides are provided with four pin holes 22 which are coaxial, one hinge pin is movably inserted in the four pin holes 22, and the two ends are axially limited; the concrete structure of the other end of the connecting rod 28 hinged to the inner upper corners 26 of the two irregular triangular plates can be that the two connecting blocks 39 at the other end of the connecting rod 28 and the inner upper corners 26 of the two irregular triangular plates at the two sides have four pin holes 22 which are coaxial, and a hinge pin is movably inserted in the four pin holes 22 and has two ends axially limited.

The connecting piece 39 is also called a connecting plate. The two ends of the hinge pin are axially limited, for example, the hinge pin is axially limited by adopting a bolt and nut structure, or one end of the hinge pin is a shaft shoulder, the other end of the hinge pin is provided with a radial hole, and a cotter pin is arranged in the radial hole for axially limiting.

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. A pulley block device of a drilling machine for pile foundation construction comprises a plurality of groups of pulley blocks supported on respective pulley supports, each group of pulley blocks is used for suspending a drill rod, and the pulley block device is characterized in that: each pulley bracket adopts a hinge four-bar mechanism, and two ends of each pulley bracket are hinged on a rotating device fixedly connected to the top end of the mast; one end of each pulley support is rotatably connected with a first outer upper pulley and a first inner lower pulley, the other end of each pulley support is rotatably connected with a second outer upper pulley and a second inner lower pulley, one end of a steel wire rope is fixed with one end of each pulley support, the steel wire rope winds the first inner lower pulley at one end, the second inner lower pulley at the other end, a suspension pulley rotatably connected with a tractor at the top of a drill rod, winds the second outer upper pulley at the other end, and is connected with a hoisting wheel of a hoisting machine after the first outer upper pulley at one end.

2. The pulley block arrangement of a drilling rig for pile foundation construction of claim 1, wherein: each pulley bracket comprises a first connecting rod, a connecting rod and a second connecting rod; the first connecting frame rod comprises a first lower connecting frame rod and a first upper connecting frame rod, the inner lower end of the first lower connecting frame rod is hinged with the lower end of one side of the circular rotating drum of the rotating device, the outer upper end of the first lower connecting frame rod is connected with one end of the connecting rod, the inner lower end of the first upper connecting frame rod is hinged with the upper end of one side of the circular rotating drum of the rotating device, and the outer upper end of the first upper connecting frame rod is connected with one end of the connecting rod; the other end of the connecting rod is connected with the outer upper end of the second side link; the inner lower end of the second side link is hinged with the upper end of one side of the circular rotating drum.

3. The pulley block arrangement of a drilling rig for pile foundation construction of claim 2, wherein: the diameters of the first inner lower pulley and the second inner lower pulley are smaller than the diameters of the first outer upper pulley and the second outer upper pulley, and the diameter of the suspension pulley is equal to the diameters of the first outer upper pulley and the second outer upper pulley.

4. The pulley block arrangement of a drilling rig for pile foundation construction of claim 3, wherein: one end of the steel wire rope penetrates through a through hole of the first lower side link and is fixedly connected with the middle of the first lower side link through a steel wire ball;

the number of the first upper connecting frame rods is two, a first pin shaft is fixedly connected between the two first upper connecting frame rods, and a first inner lower sliding wheel positioned in a gap between the two first upper connecting frame rods is matched on the first pin shaft in a sliding manner; the outer upper ends of the two first upper connecting frame rods are fixedly connected with a regular triangle plate respectively, the inner lower corners of the two regular triangle plates are hinged with the outer upper ends of the respective first lower connecting frame rods respectively, the outer corners of the two regular triangle plates are fixedly connected with a second pin shaft, and a first inner lower pulley positioned in a gap between the two regular triangle plates is in sliding fit with the second pin shaft; one end of the connecting rod is hinged with the inner upper corners of the two regular triangular plates;

the number of the second side link rods is two, a third pin shaft is fixedly connected between the two second side link rods, and a second inner lower sliding wheel positioned in a gap between the two second side link rods is in sliding fit with the third pin shaft; the outer upper ends of the two second connecting frame rods are fixedly connected with the inner lower corners of the two irregular triangular plates respectively, the inner upper corners of the two irregular triangular plates are hinged with the other end of the connecting rod, the outer corners of the two irregular triangular plates are fixedly connected with a fourth pin shaft, and the second outer upper pulleys are rotatably matched on the fourth pin shaft.

5. The pulley block arrangement of a drilling rig for pile foundation construction of claim 1, wherein: the pulley supports provided with the pulley blocks are three, the overlooking projection line of the width bisector of each pulley support coincides with a diameter line of the circular rotary drum of the rotating device, the included angles of the width bisectors of two adjacent pulley supports are 60 degrees, the heights of the connecting rods of the three pulley supports are different and are distributed in a pressing mode, a middle mode and an upper mode, and each connecting rod inclines from the first outer upper pulley end to the second outer upper pulley end from bottom to top.

6. The pulley block arrangement of a drilling rig for pile foundation construction according to claim 1, wherein: the continuous drill rod tractor further comprises a plurality of auxiliary frames fixedly connected with the tractor, each auxiliary frame is provided with an inner hole for the drill rod to penetrate through and accommodate the tractor, each auxiliary frame is in sliding fit with a pair of first sliding rails fixedly connected to the circular rotary drum through a plurality of row claws, the mast is further provided with two second sliding rails which are arranged on the same vertical line and are in transition and downward or upward sliding fit with the auxiliary frames of the tractor connected with the continuous drill rod when the continuous drill rod is positioned right above the center hole of the power head, and the two second sliding rails are fixedly connected to the mast above the lower half section.

7. The pulley block arrangement of a drilling rig for pile foundation construction of claim 1, wherein: the rotary encoder is arranged on the rotary drum and used for controlling the rotation angle of the rotary drum, and the rotary encoder further comprises a main controller, wherein the rotary encoder is electrically connected with the main controller.

8. The pulley block arrangement of a drilling rig for pile foundation construction of claim 4, wherein: the hinge structure of the lower end of the inner side of the first lower side link and the lower end of one side of the circular rotary drum, the hinge structure of the lower end of the inner side of the two first upper side link and the upper end of one side of the circular rotary drum, the hinge structure of the lower end of the inner side of the two second side link and the upper end of the other side of the circular rotary drum, the hinge structure of the hinge pin which is fixedly connected with the lug plate on the circular rotary drum and the connecting block which is fixedly connected with the lower end of the side link, a plurality of pin holes of the coaxial line which are arranged on the lug plate and the connecting block and is movably inserted in the plurality of pin holes and has two axial limiting ends.

9. The pulley block arrangement of a drilling rig for pile foundation construction of claim 8, wherein: the hinge structure of the outer upper end of the first lower side link and the inner lower corners of the two regular triangular plates is characterized in that two connecting blocks are arranged at the outer upper end of the first lower side link, four pin holes with the same axis are arranged on the inner lower corners of the two regular triangular plates and the two connecting blocks, and a hinge pin is movably inserted in the four pin holes and axially limited at two ends.

10. The pulley block arrangement of a drilling rig for pile foundation construction of claim 4, wherein: the hinge structure of one end of the connecting rod and the inner upper corners of the two regular triangular plates is that four pin holes which are coaxial are arranged on the two connecting blocks at one end of the connecting rod and the inner upper corners of the two regular triangular plates at the two sides, one hinge pin is movably inserted in the four pin holes, and the two ends are axially limited; the other end of the connecting rod is hinged with the inner upper corners of the two irregular triangular plates, the two connecting blocks at the other end of the connecting rod and the inner upper corners of the two irregular triangular plates at two sides are provided with four pin holes with the same axis, and a hinge pin is movably inserted in the four pin holes and axially limited at two ends.

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