Derrick mast crane

Abstract

The utility model relates to the technical field of derrick cranes, and discloses a derrick crane which comprises a fixed upright post, a rotating arm frame and a pulley mechanism, a first pulley mounting seat for mounting the pulley mechanism and a connecting seat for mounting the rotating arm frame are arranged on the fixed upright post; the rotating arm frame comprises a front arm frame and a rear arm frame. The whole lifting arm is improved into the front arm frame and the rear arm frame, and the front arm frame and the rear arm frame can rotate around the end parts, so that the heavy object can be more flexibly in place by controlling the rotating angles and directions of the front arm frame and the rear arm frame, the accurate in-place difficulty of the object taking pulley block and the heavy object is reduced, and the condition of obstacle interference is reduced; the upper installation space of the structure is small, continuous translation of the object taking pulley block and the heavy object in the maximum amplitude range can be achieved without a variable amplitude device, the effective lifting height is increased, the total height of the derrick mast can be effectively reduced, and limitation of the effective height is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of derrick cranes, and particularly relates to a derrick crane. Background Art

[0002] Derrick hoisting, also known as mast hoisting, is a commonly used hoisting tool. It cooperates with a winch, a pulley block, a rope, etc. to perform hoisting operations, so as to solve the problem of item positioning during the maintenance, repair, and replacement of accessories of tall equipment (such as tower cranes) and components (such as high-voltage transmission and transformation iron towers).

[0003] The existing derrick cranes are as Figures 1 to 4 shown Figure 1 : The lower part of the column rotates, the overall boom, the manual luffing system (including: manual luffing mechanism, luffing rope wire rope, luffing trolley), and external auxiliary mechanisms are used. Due to the manual luffing mechanism and the lower rotation, a large installation space is required at the lower part; due to the luffing trolley and the tie rod, the height of the derrick increases (at the same lifting height), and a higher installation space is required; due to the overall boom, a large rotation space is required at the upper part; the rope entry position / direction is fixed, and the installation position of the auxiliary mechanism is limited or a complex pulley system is required to meet its rope entry requirements. Figure 2 : The middle part of the column rotates, the overall boom, the amplitude of the lifting device and the heavy object is changed by manually adjusting the installation position of the moving pulley block, and external auxiliary mechanisms are used. It cannot perform load luffing, and the amplitude position is limited; due to the overall boom, a large rotation space is required at the upper part; the rope entry direction is fixed, and the installation position of the auxiliary mechanism is limited or a complex pulley system is required to meet its rope entry requirements. Figure 3 : The lower part of the column rotates, the overall boom, the amplitude of the lifting device and the heavy object is changed by manually adjusting the installation position of the moving pulley block, a self-provided hoisting mechanism, and the hoisting mechanism and its control system are respectively installed on the column. The lower part rotates, and a large installation space is required at the lower part; it cannot perform load luffing, and the amplitude position is limited; due to the overall boom, a large rotation space is required at the upper part; the installation position of the hoisting mechanism and its control system is fixed, and it is troublesome to change the installation position. Figure 4 : The upper part of the column rotates, the overall boom, the amplitude of the lifting device and the heavy object is changed by manually adjusting the installation position of the moving pulley block, a self-provided hoisting mechanism, and the hoisting mechanism and its control system are respectively installed on the column. It cannot perform load luffing, and the amplitude position is limited; due to the overall boom, a large rotation space is required at the upper part; the installation position of the hoisting mechanism and its control system is fixed, and it is troublesome to change the installation position.

[0004] Therefore, in practical applications, the current derrick structure has problems such as difficult accurate positioning, limited effective height, and the derrick boom is easily interfered by obstacles. Content of the Utility Model

[0005] The utility model mainly provides a derrick crane, which solves the problems in the prior art that the derrick crane has difficulties in accurate positioning, limited effective height, and easy interference of the derrick boom, etc.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A derrick crane includes a fixed column, a rotating boom, a pulley mechanism, and a lifting mechanism; a first pulley mounting seat for installing the pulley mechanism and a connecting seat for installing on the rotating boom are arranged on the fixed column;

[0008] The rotating boom includes a front boom and a rear boom. A connecting plate is arranged at the outer end of the front boom, a connecting ear plate is arranged below the front boom, and a front pulley seat is arranged on the front boom. The inner end of the front boom is horizontally rotatably connected to the outer end of the rear boom, the inner end of the rear boom is horizontally rotatably connected to the connecting seat, and a rear pulley seat is arranged on the rear boom.

[0009] Further, the pulley mechanism includes a first swinging pulley group, a first fixed pulley group, a second swinging pulley group, and a second fixed pulley group; the first swinging pulley group is horizontally rotatably connected to the first pulley mounting seat, the first fixed pulley group is rotatably connected to the rear pulley seat; the second swinging pulley group is horizontally rotatably connected to the position below the horizontal rotating connection of the front boom and the rear boom; the second fixed pulley group is rotatably connected to the front pulley seat.

[0010] Further, the lifting mechanism includes a load-carrying pulley group, a first end fixing member, a rope, and a lifting power assembly; the lifting power assembly includes a controller, a motor, a reducer, a drum, a rope retaining member, a second end fixing member, a bearing seat, and a chassis. The motor is arranged on the chassis, the controller is used to control the motor, the reducer is arranged between the output end of the drum and the motor, the drum rotates driven by the motor, a bearing seat is arranged on the drum, the bearing seat is arranged on the chassis, and the second end fixing member is arranged on the drum; one end of the rope is fixedly connected to the second end fixing member, and the other end is fixedly connected to the first end fixing member. The first end fixing member and the second end fixing member can adopt any one of the prior arts as long as they can fix the two ends of the rope.

[0011] Further, an inner hole is arranged in the connecting seat, and a first bearing and a second bearing are arranged in the inner hole; a first pin shaft is arranged at the inner end of the rear boom, and a second pin shaft is arranged at the outer end of the rear boom. The first pin shaft is rotatably connected to the connecting seat through the first bearing and the second bearing; a third bearing is arranged on the front boom and is rotatably connected to the second pin shaft through the third bearing.

[0012] Further, a fourth pin shaft is rotatably connected to the first swinging pulley set, and the fourth pin shaft is fixedly connected to the first pulley mounting seat; the second swinging pulley set includes a second pulley mounting seat rotatably connected to the second pin shaft, and two pulley shafts arranged on the second pulley mounting seat with the second pin shaft as the symmetry axis. A mating pulley is rotatably connected to the two pulley shafts, and a shield is arranged on the second pulley mounting seat.

[0013] Beneficial effects: In this application, the overall jib is improved into a front jib and a rear jib, both of which can rotate around the end. By controlling the rotation angle and direction of the front jib and the rear jib, the heavy object can be positioned more flexibly, reducing the difficulty of accurately positioning the lifting pulley set and the heavy object, and reducing the interference of obstacles; the upper installation space of this structure is small, and the lifting pulley set and the heavy object can be continuously translated within the maximum amplitude range without a luffing device, increasing the effective lifting height, effectively reducing the total height of the derrick and avoiding the limitation of the effective height. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the first existing derrick crane;

[0015] Figure 2 It is a schematic diagram of the second existing derrick crane;

[0016] Figure 3 It is a schematic diagram of the third existing derrick crane;

[0017] Figure 4 It is a schematic diagram of the fourth existing derrick crane;

[0018] Figure 5 It is a front view schematic diagram of the front jib of this embodiment without the installation of the lifting power component;

[0019] Figure 6 For this embodiment Figure 5 Schematic diagram of the lifting pulley set of the installation method of the lifting power component;

[0020] Figure 7 It is a front view schematic diagram of the front jib of this embodiment with the installation of the lifting power component;

[0021] Figure 8 For this embodiment Figure 7 Schematic diagram of the lifting pulley set of the installation method of the lifting power component;

[0022] Figure 9 It is a side sectional view schematic diagram of the second swinging pulley set of this embodiment;

[0023] Figure 10 It is a top view schematic diagram of the lifting power component installed on the front jib of this embodiment;

[0024] Figure 11 Schematic diagram of the swing of the first swing pulley set of this embodiment.

[0025] Reference numerals: fixed vertical column 1, first pulley mounting seat 101, connecting seat 102, first bearing 103, second bearing 104, rotating boom 2, front boom 201, connecting ear plate 2011, front pulley seat 2012, connecting plate 2013, third bearing 2014, rear boom 202, rear pulley seat 2021, first pin shaft 203, second pin shaft 204, pulley mechanism 3, first swing pulley set 301, fourth pin shaft 302, first fixed pulley set 303, second swing pulley set 304, mating pulley 3041, pulley shaft 3042, second pulley mounting seat 3043, shield 3044, second fixed pulley set 305, lifting mechanism 4, load-carrying pulley set 401, end pin shaft 4011, hoisting pulley 4012, first end fixing member 402, rope 403, lifting power assembly 420, controller 424, motor 425, reducer 426, drum 427, rope retaining member 428, second end fixing member 429, bearing seat 430, chassis 431. Detailed implementation manners

[0026] Hereinafter, a derrick crane technical solution related to the present utility model will be further described in detail with reference to embodiments.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] As Figures 5 to 11 shown, a derrick crane of this embodiment includes a fixed vertical column 1, a rotating boom 2, a pulley mechanism 3 and a lifting mechanism 4; a first pulley mounting seat 101 for mounting the pulley mechanism 3 and a connecting seat 102 for mounting on the rotating boom 2 are provided on the fixed vertical column 1;

[0029] The rotating boom 2 includes a front boom 201 and a rear boom 202. A connecting plate 2013 is provided at the outer end of the front boom 201. A connecting ear plate 2011 is provided below the front boom 201. A front pulley seat 2012 is provided on the front boom 201. The inner end of the front boom 201 is horizontally rotatably connected to the outer end of the rear boom 202. The inner end of the rear boom 202 is horizontally rotatably connected to the connecting seat 102. A rear pulley seat 2021 is provided on the rear boom 202. An inner hole is provided in the connecting seat 102, and a first bearing 103 and a second bearing 104 are provided in the inner hole. A first pin shaft 203 is provided at the inner end of the rear boom 202, and a second pin shaft 204 is provided at the outer end of the rear boom 202. The first pin shaft 203 is rotatably connected to the connecting seat 102 through the first bearing 103 and the second bearing 104. A third bearing 2014 is provided on the front boom 201, and the front boom 201 is rotatably connected to the second pin shaft 204 through the third bearing 2014. The front boom 201 can rotate around the center of the second pin shaft 204, and the rear boom 202 can rotate around the center of the first pin shaft 203.

[0030] In a specific embodiment, the pulley mechanism 3 includes a first swinging pulley group 301, a first fixed pulley group 303, a second swinging pulley group 304, and a second fixed pulley group 305. The first swinging pulley group 301 is horizontally rotatably connected to the first pulley mounting seat 101. The first fixed pulley group 303 is rotatably connected to the rear pulley seat 2021. The second swinging pulley group 304 is horizontally rotatably connected to a position below the horizontal rotating connection between the front boom 201 and the rear boom 202. The second fixed pulley group 305 is rotatably connected to the front pulley seat 2012. A fourth pin shaft 302 is rotatably connected to the first swinging pulley group 301, and the fourth pin shaft 302 is fixedly connected to the first pulley mounting seat 101. The second swinging pulley group 304 includes a second pulley mounting seat 3043 rotatably connected to the second pin shaft 204, and two pulley shafts 3042 arranged symmetrically with respect to the second pin shaft 204 on the second pulley mounting seat 3043. A mating pulley 3041 is rotatably connected to the two pulley shafts 3042, and a shield 3044 is provided on the second pulley mounting seat 3043. As Figure 9As shown, the rope 403 passes through between the two mating pulleys 3041; the second pulley mounting base 3043 is mounted on the second pin shaft 204 between the forearm and the rear arm and can freely swing around the center line on the second pin shaft 204; the second fixed pulley set 305 is mounted on the front pulley seat 2012 of the forearm frame 201. The extension line of the center line of the first pin shaft 203 is approximately equal to the radius of the rope 403 from the bottom diameters of the pulley grooves of the first fixed pulley set 303 and the second fixed pulley set 305; the upper connecting line tangent to the bottom diameters of the pulley grooves of the first fixed pulley set 303 and the second fixed pulley set 305 passes through between the two mating pulleys 3041 of the second swinging pulley set 304, and this connecting line is basically coincident with the center of the pulley groove of the mating pulley 3041.

[0031] In a specific embodiment, the lifting mechanism 4 includes a load-carrying pulley set 401, a first end fixing member 402, a rope 403, and a lifting power assembly 420; the lifting power assembly 420 includes a controller 424, a motor 425, a speed reducer 426, a drum 427, a rope retaining member 428, a second end fixing member 429, a bearing seat 430, and a chassis 431. The motor 425 is disposed on the chassis 431. The controller 424 is used to control the motor 425. The speed reducer 426 is disposed between the output end of the drum 427 and the motor 425. The drum 427 rotates driven by the motor 425. The bearing seat 430 is disposed on the drum 427, and the bearing seat 430 is disposed on the chassis 431. The second end fixing member 429 is disposed on the drum 427; one end of the rope 403 is fixedly connected to the second end fixing member 429, and the other end is fixedly connected to the first end fixing member 402. One end of the rope 403 is fixed to the drum 427 through the second end fixing member 429, and the other end is connected to the load-carrying pulley set 401 through the first end fixing member 402 and the end pin 4011, or the rope 403 passes around the pulley of the load-carrying pulley set 401 and is connected to the connecting ear plate 2011 on the forearm frame 201 through the first end fixing member 402 and the end pin 4011.

[0032] As Figure 5 、 Figure 6As shown, according to the actual on-site needs, the lifting power assembly 420 can be fixed at any position of other components within the sector range where the first swinging pulley set 301 can swing around the swinging center (the center line of the fourth pin shaft 302) by bolts or pin shafts. The rope 403 is wound out from the drum 427, and successively passes around the pulleys of the first swinging pulley set 301, the pulleys of the first fixed pulley set 303, between the two pulleys of the second swinging pulley set 304, and the pulleys of the second fixed pulley set 305, and is connected to the load-taking pulley set 401 through the first end fixing member 402 and the end pin shaft 4011 to form a single-sheave load-taking system; or after the rope 403 passes around the pulleys of the second fixed pulley set 305, it continues to pass around the hoisting pulley 4012 of the load-taking pulley set 401 and is connected to the connecting ear plate 2011 (i.e., the fixed ear seat) on the front boom 201 through the first end fixing member 402 and the end pin shaft 4011 to form a double-sheave load-taking system.

[0033] As Figure 7 , Figure 8 As shown, according to the actual on-site needs, the lifting power assembly 420 can be connected to the connecting plate 2013 at the end of the front boom 201 by bolts or pin shafts. After the rope 403 is wound out from the drum 427, it is connected to the load-taking pulley set 401 through the first end fixing member 402 and the end pin shaft 4011 to form a single-sheave load-taking system; or after the rope 403 is wound out from the drum 427, it passes around the hoisting pulley 4012 of the load-taking pulley set 401 and is connected to the connecting ear plate 2011 (i.e., the fixed ear seat) on the front boom 201 through the first end fixing member 402 and the end pin shaft 4011 to form a double-sheave load-taking system.

[0034] When the front boom 201 and the rear boom 202 are in a straight line, the distance between the load-taking pulley set 401 and the center line of the first pin shaft 203 is the maximum amplitude of the load-taking device. By manually driving the rotation angle of the front boom 201 around the center of the second pin shaft 204 and the rotation angle of the rear boom 202 around the center of the first pin shaft 203, the distance (i.e., the amplitude) between the load-taking pulley set 401 and the center line of the first pin shaft 203 is changed, so as to realize the translation of the load-taking pulley set 401 and the load. By driving the rope 403 to wind through the drum 427 of the lifting power assembly 420, the lifting and lowering movement of the load-taking pulley set 401 and the load is realized.

[0035] The first fixed pulley set 303, the second swinging pulley set 304, and the second fixed pulley set 305 are located below the front arm frame 201, the rear arm frame 202, and the second pin shaft 204. As a variation, according to actual needs, the first fixed pulley set 303, the second swinging pulley set 304, and the second fixed pulley set 305 can be located above the front arm frame 201, the rear arm frame 202, and the second pin shaft 204. At this time, the first pin shaft 203 needs to be hollow. After the rope 403 bypasses the first swinging pulley set 301, it passes through the hollow first pin shaft 203 and then bypasses the pulleys of the first fixed pulley set 303, the second swinging pulley set 304, and the second fixed pulley set 305 in sequence.

[0036] In this application, the overall boom is improved to the front arm frame 201 and the rear arm frame 202, both of which can rotate around the end. Thus, by controlling the rotation angle and direction of the front arm frame 201 and the rear arm frame 202, the heavy object can be positioned more flexibly, realizing the reduction of the difficulty in accurately positioning the lifting pulley set 401 and the heavy object, and reducing the interference by obstacles; the upper installation space of this structure is small, and the lifting pulley set 401 and the heavy object can be continuously translated within the maximum amplitude range without a luffing device, increasing the effective lifting height, effectively reducing the total height of the derrick, and avoiding the limitation of the effective height.

[0037] As Figure 11 shown, the first swinging pulley set 301 can swing around the center line of the fourth pin shaft 302. Although the rope entry position is fixed, the rope entry direction is allowed to be at any position within the maximum swing range (sector) of the first swinging pulley set 301, such as Figure Five the "+ limit rotation angle of the first swinging pulley set 301" and the "- limit rotation angle of the first swinging pulley set 301" in , which improves the installation position requirements of the lifting power assembly 420 (or an external auxiliary mechanism).

[0038] The relative positions of the pulley sets of the pulley mechanism 3 and the rope threading direction can ensure that even when the load is in a suspended state, within the range required by humans and machines, by manually controlling the rotation angle / direction of the front arm and the rear arm, the load can be continuously translated. For example: the distance between the extension line of the center line of the first pin shaft 203 and the bottom diameter of the pulley grooves of the first fixed pulley set 303 and the first swinging pulley set 301 is approximately equal to the radius of the rope 403; the upper connecting line tangent to the bottom diameters of the pulley grooves of the first fixed pulley set 303 and the second fixed pulley set 305 passes between the two mating pulleys 3041 of the second swinging pulley set 304, and this connecting line is basically coincident with the center of the pulley grooves of the mating pulleys 3041.

[0039] The lifting system includes a first end fixing member 402, a rope 403, a lifting power assembly 420, a controller 424, etc. As an independent system, it can be installed at the end of the front boom 201, or can be installed at any position within the maximum swing range (sector) of the first swing pulley set 301 as an independent auxiliary mechanism, or can be applied as an independent auxiliary mechanism to other occasions where load lifting needs to be achieved, effectively expanding the application range of the lifting system.

[0040] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gin pole hoist, characterized in that: It includes a fixed column, a rotating boom, a pulley mechanism and a lifting mechanism; a first pulley mounting seat for mounting the pulley mechanism and a connecting seat for mounting on the rotating boom are provided on the fixed column; The rotating boom includes a front boom and a rear boom. A connecting plate is provided at the outer end of the front boom, a connecting ear plate is provided below the front boom, and a front pulley seat is provided on the front boom. The inner end of the front boom is horizontally rotatably connected to the outer end of the rear boom, the inner end of the rear boom is horizontally rotatably connected to the connecting seat, and a rear pulley seat is provided on the rear boom.

2. The gin pole hoist according to claim 1, characterized in that: The pulley mechanism includes a first swinging pulley group, a first fixed pulley group, a second swinging pulley group and a second fixed pulley group; the first swinging pulley group is horizontally rotatably connected to the first pulley mounting seat, the first fixed pulley group is rotatably connected to the rear pulley seat; the second swinging pulley group is horizontally rotatably connected to a position below the horizontal rotating connection between the front boom and the rear boom; the second fixed pulley group is rotatably connected to the front pulley seat.

3. The gin pole hoist according to claim 2, characterized in that: The lifting mechanism includes a load-carrying pulley group, a first end fixing member, a rope and a lifting power assembly; the lifting power assembly includes a controller, a motor, a reducer, a drum, a rope retaining member, a second end fixing member, a bearing seat and a chassis. The motor is provided on the chassis, the controller is used to control the motor, the reducer is provided between the output end of the drum and the motor, the drum is rotated by the drive of the motor, a bearing seat is provided on the drum, the bearing seat is provided on the chassis, and the second end fixing member is provided on the drum; one end of the rope is fixedly connected to the second end fixing member, and the other end is fixedly connected to the first end fixing member.

4. A gin pole hoist according to claim 3, wherein: An inner hole is provided in the connecting seat, and a first bearing and a second bearing are provided in the inner hole; a first pin shaft is provided at the inner end of the rear boom, and a second pin shaft is provided at the outer end of the rear boom. The first pin shaft is rotatably connected to the connecting seat through the first bearing and the second bearing; a third bearing is provided on the front boom and is rotatably connected to the second pin shaft through the third bearing.

5. A derrick crane according to claim 4, characterized in that: A fourth pin shaft is rotatably connected to the first swinging pulley group, and the fourth pin shaft is fixedly connected to the first pulley mounting seat; the second swinging pulley group includes a second pulley mounting seat rotatably connected to the second pin shaft, two pulley shafts provided on the second pulley mounting seat with the second pin shaft as the symmetry axis, and a mating pulley is rotatably connected to the two pulley shafts. A protective cover is provided on the second pulley mounting seat.

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