CN209493242U - A kind of parallel crane of both arms - Google Patents

Abstract

The utility model provides a kind of parallel crane of both arms, the parallel crane of both arms includes pedestal, pivoting support, revolving platform, device for revolving and driving, tripod and Dual-arm crane arm, pedestal is connect with pivoting support outer ring, revolving platform is connect with pivoting support inner ring screw rod, tripod is fixedly mounted on revolving platform, Double-arm hinged is on revolving platform, base end face is rectangle, top surface is circular hollow base, base top is equipped with upward the first cylinder, the first cylinder cross-sectional area is less than base end face area, the central axis of the first cylinder and the central axis of base end face are parallel but be not overlapped, revolving platform includes the four prisms cylinder with cavity, the second cylinder and plectane equipped with hollow structure, when transferring cargo, start device for revolving and driving, it drives pivoting support and revolving platform is driven to produce suitable position and carry out being deployed into rest area , may be implemented that elevating capacity is big, and bearing capacity is strong using the crane, be self-possessed small, stability is high, energy conservation and environmental protection.

Description

A kind of parallel crane of both arms

Technical field

The utility model relates to crane technical fields, specifically disclose a kind of parallel crane of both arms.

Background technique

Ocean platform crane is mainly the crane that uses on ocean platform, be a kind of ocean platform handling goods and Equipment above lifting people to platform is one of most important production and safety equipment in offshore oil production, due to sea Bad environments, to its security reliability, maintenanceability, can wind resistance and corrosion resistance require it is very high.Meanwhile it is and land general Heavy-duty machine is different, and ocean platform crane is typically secured in ship platform, and the movement of platform itself can generate load movement strong Strong influence.In operation, offshore crane can be with wave pitching, rolling and heave, these movements will lead to load and swing, Especially in lifting process, this type games of platform easily lead to the load sling and bump against again with deck, and then threaten and make The safety of industry.

Ocean platform crane includes fixed crane and swing jack, and fixed crane construction cost is low, Structure is simple, therefore applies quite extensively in practice of construction, but due to structure, work capacity is restricted, efficiency It is more low.Swing jack can be realized rotatable, the shortcomings that can overcoming fixed crane by rotatable base, And boom can be moved forward and backward, therefore getting well than fixed crane in terms of mobility.

With the fast development of offshore wind farm and oil exploitation industry, it is higher that update is proposed to marine lifting equipment It is required that lifting capacity is big, work range has become greatly custom requirements, on this basis, to offshore platform crane effective operation face More stringent requirements are proposed with bearing load for product, that is, requires floor space shared by lifting equipment the smaller the better, bearing load is bigger Better, to improve the service efficiency of offshore platform, pedestal can effectively be combined in order to achieve the above object by reducing transportation cost The advantages of formula crane and rail column crane, and realized by the structure of improvement crane itself.

A kind of Large-scale pile winding type offshore platform is disclosed in the patent document application No. is CN201220444856.4 Heavy-duty machine is cased with shoe, the shoe is placed on the main deck, described including the spud leg being inserted on main deck on the spud leg Shoe is equipped with pedestal, and the pedestal is equipped with rotary supporting device, is equipped with revolving platform, institute above the rotary supporting device The side for stating revolving platform is equipped with drivers' cab and computer room, luffing range of cantilever support winch is successively arranged on the revolving platform, main raising twists Vehicle, secondary hoister winch are additionally provided with A-frame on the revolving platform, and the top of the A-frame is equipped with A-frame top pulleys Group, the revolving platform are connected with cantilever crane, and the top of the cantilever crane is equipped with cantilever crane head pulley blocks, the top lower section of the cantilever crane Equipped with main suspension hook, secondary suspension hook and luffing suspension hook, the offshore platform lifting machine outer type is succinct, and compact-sized, occupancy deck space is small, Adaptable, service efficiency is higher, but this offshore platform crane shoe be it is columnar structured, crane pedestal is also cylinder Shape structure, the limited load bearing capacities of this structure, stability are poor.

A kind of both arms derrick crane is disclosed in the patent document application No. is CN201320664157.5, including is risen Heavy-duty machine main body and boom portion, crane main body and boom portion articulated connection, and between be additionally provided with torque arm mechanism, torque arm mechanism one End connection boom portion, the other end connect crane main body by steel cable；The boom portion includes the first boom and the second boom, First boom and the second boom are arranged side by side, and are fixed by connector；Torque arm mechanism includes first connecting rod, second connecting rod, company Connect frame and torque arm pulley blocks, one end of first connecting rod and second connecting rod is connect by connection frame with torque arm pulley blocks, the other end and The boom of the connection of boom portion, the crane needs to hang using single armed using double-arm structure in the case where carrying identical load The length of boom of the length of arm than using when both arms boom is grown more than twice, so that both arms boom reduces self weight, structure Outer dimension reduces, and boom structure stability is good, but crane pedestal is oval tubular construction, and fixed platform is direct with hull Connection, is welded on the main deck of ship, and pedestal is fixed on the stationary platform, and pedestal bit length is columnar structured, and barrel dliameter is smaller, load-bearing Ability is poor, and height is larger, and center of gravity is high, and structural stability is poor；The both arms derrick crane is fixed crane, and the scope of application has Limit, utilization rate are low.

Summary of the invention

To solve problems of the prior art, the utility model provides a kind of both arms parallel crane, passes through operation The parallel crane of this both arms, may be implemented that elevating capacity is big, and bearing capacity is strong, and stability is high, and it is tight to improve security performance structure It gathers, adaptable, service efficiency is high.

A kind of to achieve the above purpose, the technical solution of the present invention is: the parallel crane of both arms, including pedestal, return Turn bearing, revolving platform, device for revolving and driving, tripod and Dual-arm crane arm, the outer ring screw rod of base top and pivoting support Connection, the bottom of revolving platform and the inner ring screw rod of pivoting support connect, and tripod is fixedly mounted on the top of revolving platform, double Arm boom portion is hinged on revolving platform, the pedestal be bottom surface section be rectangle, top surface section is circular hollow base, The top of pedestal is equipped with the first cylinder for upwardly extending, and from base bottom to the first cylinder, top is in hollow base inner wall and the One cylinder inner wall is equipped with the evenly arranged base reinforcing ribs board group of the peripheral direction along pedestal extended up and down, the pedestal The central axis direction of all base reinforcing ribs plates towards the first cylinder is arranged in reinforcing rib board group；It is that rectangle is with section in section The base reinforcing ribs plate of circular transition portion has inside protrusion, is circular arc between raised lower end and base reinforcing ribs plate Transition；The first cylinder cross-sectional area is less than the area of base end face rectangle, and the central axis of the first cylinder is parallel to base end face Central axis, and the center of base end face to the first cylinder central axis distance be greater than 0；

Revolving platform includes the four prisms cylinder with cavity, the second cylinder and the plectane equipped with hollow structure, described tetragonous Cylinder includes rectangular-shaped top plate, the rectangular base plate equipped with circular hollow structure equipped with circular hollow structure, rectangular base plate include according to Secondary the first connected rectangular base plate, the second rectangular base plate, third rectangular base plate, the first rectangular base plate and the second rectangular base plate tilt Setting, third rectangular base plate are obliquely installed with the second rectangular base plate, and the first rectangular base plate and third rectangular base plate are arranged in parallel；

The top of described the second cylinder is located in four prisms cylinder, and the rectangular-shaped top plate at the top of the second cylinder and four prisms cylinder Bottom surface welding, the welding of the second cylinder bottom is equipped with the plectane of circular hollow structure, the second cylinder is located on plectane and plectane welds The inner circumferential for meeting place is equipped with the mounting hole of two or more pivoting supports, circular hollow knot in the rectangular-shaped top plate of the four prisms cylinder Structure central axis, quadrangular rectangular base plate on circular hollow structure central axis, the second cylinder central axis, plectane circular hollow knot Structure central axis and the first cylinder central axis are point-blank；The inner wall of the second cylinder is along the equal in the radial direction of the second cylinder It is even that the first reinforcing rib board group is distributed with, having in the radial direction point along the second cylinder on the second cylinder outer wall in four prisms cylinder It is furnished with the second reinforcing rib board group, is equipped with third reinforcing rib board group installing zone, third reinforcing rib board group installing zone inside four prisms cylinder It is located at turn around Dual-arm crane arm opposite side on platform, and is equipped with cross reinforcing board group in third reinforcing rib board group installation region With waling board group.

Pile is sequentially inserted into pedestal, pivoting support, revolving platform from the bottom to top, is then passed through deck, is fixed on seabed, stablizes Property it is high, impact resistance ability is strong, compared to the prior art a kind of Large slalom crane for offshore platform, and boom portion is using parallel double Boom, boom structure stability is good, elevating capacity is big, and elevating capacity is bigger, and bearing capacity is stronger；It is large-scale compared to the prior art Around stake formula offshore platform crane and a kind of both arms derrick crane, it is equipped with the first cylinder upwardly extended at the top of the base Structure, with facilitate and rotationally support outer ring screw rod connection, since the central axis of the first cylinder is parallel in base end face Mandrel, and the center of base end face to the first cylinder central axis distance be greater than 0, i.e. the central axis of pedestal deviates the first cylinder Central axis so that on pedestal positioned at Dual-arm crane arm link position side reinforcing rib length increase.

Pedestal is the main force part of whole device, and one end force analysis of both arms boom is housed to pedestal, is being transferred When cargo rotation reaches suitable position all standing, due to effect of inertia, in pedestal, there are torques in cross-sectional circumferential tangential direction Stress, this stress be easy to cause pedestal torsional deformation, while cargo is hung in boom head, and pulls boom downward, cuts in pedestal There are moment of flexure stress on face, tripod, wirerope, winch etc. be placed on article on revolving platform, pivoting support, revolving platform, The weight such as both arms boom and pedestal own wt, which act on, gives deck pressure, according to active force and reaction force principle, deck effect Give pedestal one supporting force, this active force is dispersed in base wall, along base wall direction obliquely, this supporting force is decomposable At stress straight up and it is horizontally directed to center axial stress, stress and moment of flexure stress constitute opposite side on pedestal straight up for this To stress, pedestal is caused to squeeze, be easy to cause pedestal to be bent, fracture in the axial direction, compared to the prior art Large-scale pile winding Formula offshore platform crane and a kind of both arms derrick crane, in the present invention, the central axis of the first cylinder only pedestal The center of bottom surface keeps the floor space close to boom portion one end pedestal larger, to make, wall larger close to boom one end pedestal volume Thicker, inner wall area is larger, and reinforcing rib is longer, more, increases the intensity of boom one end pedestal and rigidity, bending resistance Enhancing, prevents pedestal to be distorted, deform or is bent, fractures；All base reinforcing ribs plates directions first in reinforcing rib board group The central axis direction of cylinder is arranged, and the weight for being conducive to revolving platform is dispersed on pedestal and reinforcing rib downwards；Pedestal bottom Portion is rectangle, so that four face infalls of base bottom all constitute most stable of right angle, increases the stability of crane；Prolong The first cylinder cross-sectional area stretched is less than the area of bottom surface rectangle, and the pedestal structure big using upper handle increases pedestal bottom Portion contacts with deck and is formed by supporting surface, keeps pedestal stability higher, impact resistance is stronger；It is a kind of double compared to the prior art Arm derrick crane, the parallel crane of the both arms have swing jack pivoting support and revolving platform, and can be realized can revolve Turn, axial 90 ° and radial 360 ° of rotations may be implemented in boom, therefore application is strong, can opereating specification it is big, it is adaptable, use It is high-efficient；Meanwhile when the big load of carrying 1200t, needs slewing equipment volume larger, use pivoting support as revolution at this time Device, it is compact-sized simple, axial force, radial force and tilting moment can be born simultaneously, it is practical.

In addition to the transition position in rectangular section and circular cross-section is neat with the rectangular section of outer base and circular cross-section Molecules align, and the transition position of rectangular section and circular cross-section forms abrupt change of cross-section situation, therefore, rectangular section and circle are cut Molecule changes in the structure of the transition position in face, changes whole stress, also changes the stress shape of mutation punishment State and balance, by analysis, pedestal receives downward pressure, bending force and distortion power, and due to the molecule knot at the mutation Structure change dramatically, rectangular section and circular cross-section interior molecules are uniformly distributed, and stress is also just uniformly distributed, rectangular section and circle The active force of the transition position in the section resistance external force bigger since molecular change produces, makes the mistake of rectangular section and circular cross-section The stress at the place of crossing becomes much larger, and forms stress and concentrates, and the stress at this is greater than the limit stress of material, then can destroy pedestal and make It at serious accident, is concentrated in order to avoid stress and destroys pedestal, in the transition position of rectangular section and circular cross-section in addition to increasing If being also provided with protrusion outside base reinforcing ribs plate, which provides the power roughly the same with stress direction, with Increase resist pedestal be under pressure, the active force of bending force, distortion power, which is located at the transition of rectangular section and circular cross-section The partial below at place, when the transition position of the rectangular section of pedestal and circular cross-section receives bending force, convex portion be equivalent to Active force obliquely has been given, has increased and resists the active force that pedestal receives bending force, certain protrusion, which can also play, keeps out pressure It is arranged between the lower end and base reinforcing ribs plate of protrusion with the effect of distortion power so that the intensity at mutation is more reliable Circular arc avoids the formation of the phenomenon that stress is concentrated.In conclusion base reinforcing ribs plate and protrusion can greatly improve pedestal mutation The intensity in section improves security performance.

When the big load operation of crane progress 1200t, in order to meet the requirement that maximum hoisting hook carries, large size can be also selected Number tripod, winch and the wirerope being relatively large in diameter are compared so that tripod, the structure of winch and steel wire and weight are also larger It is the second cylinder outer wall in the inner wall of the second cylinder, four prisms cylinder, tetragonous in prior art Large slalom crane for offshore platform Column body is mounted on reinforcing rib board group, enhances the intensity at the top of revolving platform axially and radially, rigidity and resists bending Ability, prevents on revolving platform that bearing article weight is excessive, causes the fracture of revolving platform；Four prisms cylinder rectangular-shaped top plate board bottom portion The top of the second cylinder is welded, the welding of the second cylinder bottom is equipped with the plectane of circular hollow structure, and plectane is to facilitate and rotate branch The inner ring screw rod connection held, the central axis of revolving platform component point-blank, and towards the one end for being hinged with boom portion, are And pedestal improves stability in pile both sides equalising torques.

Further, the diagonal position of the quadrangular rectangular-shaped top plate is equipped with four groups of tripod mounting surfaces upwardly extended Plate, every group of tripod installation panel includes two the first installation panels being oppositely arranged, and each first installation panel is equipped with Tripod mounting hole, the quadrangular rectangular-shaped top plate are equipped with two groups of both arms booms upwardly extended close to the side of Dual-arm crane arm Panel is installed in portion, and every group of Dual-arm crane arm installation panel includes two the second installation panels being oppositely arranged, the second installation panel It is equipped with Dual-arm crane arm mounting hole.

Two sides are located at the second cylinder circumferential position and are respectively equipped with device for revolving and driving mounting hole group on the plectane, and revolution is driven Dynamic device mounting hole group is located between tripod installation panel and Dual-arm crane arm installation panel, each device for revolving and driving installation Hole group includes two or more revolution driving mounting hole, and one end of device for revolving and driving passes through device for revolving and driving mounting hole and returns The outer ring for turning bearing is meshed, and the other end of device for revolving and driving is fixed on the plectane of quadrangular.

Tripod mounting hole is distributed on the diagonal position of quadrangular rectangular-shaped top plate, so that tripod weight is evenly distributed on On revolving platform, to improve the stability of crane；Simultaneously when crane carries out big load operation, revolving platform volume It is larger, need more device for revolving and driving to carry out driving rotation, since device for revolving and driving mounting hole group is located at tripod installation Between panel and Dual-arm crane arm installation panel, so that device for revolving and driving is symmetricly set on plectane, so that both sides are simultaneously Driving rotation, rotation are easier, while uniformly sharing the weight of rotating platform, and being conducive to balance prevents from toppling.

Further, the tripod includes two door frame components being oppositely arranged and first crossbar, two door frame components The both ends of first crossbar are respectively welded at, each door frame component includes vertical bar and the first brace, the bottom end of the vertical bar It is fixedly mounted on position opposite with Dual-arm crane arm on revolving platform, and perpendicular to revolving platform, the bottom of first brace End is fixedly mounted on revolving platform to be connected at the top of Dual-arm crane arm position, the top of first brace and the vertical bar It connects, second crossbar and the second brace, one end of the second brace and the first brace phase is equipped on the first brace lower middle position Even, the other end of the second brace is connected with second crossbar, and the first brace of second crossbar, the second brace and door frame component constitutes three Corner structure.

Since door frame component on revolving platform relative to being arranged symmetrically, the vertical bar of door frame component, brace bottom end are fixedly mounted On revolving platform and fixed deck constitutes stable triangular structure, thus improve door frame component structural stability and The convenience of maintenance；Meanwhile being connected by first crossbar with two intersection bar assemblies between two door frame components, further to mention The stability of high door frame component.

Second crossbar and the second brace are set in brace lower middle position, constitute three-legged structure, boom with the first brace Boom is resisted when rising to vertical position, translates into the other side to prevent boom, the stability and impact resistance ability of three-legged structure are stronger.

Further, the Dual-arm crane arm includes main boom and secondary boom, the head phase of secondary boom tail portion and main boom Even, main boom and secondary boom are equipped with hook assembly；The main boom includes the first main boom and the second main boom, and the first master hangs Arm and the second main boom are arranged side by side and are fixed by connector, and the main boom of described first and the second main boom respectively correspond one A door frame component.

Such double boom structures, symmetrical, load disperses the stress of boom, so that structure is more stable, by force Degree improves, and the lifting performance of crane arm improves, it can be achieved that crane arm structural module.

Further, the first main boom and the second main boom are made of section and arm spike knot in arm root section, arm, arm Section and arm spike knot are detachably connected in root section, arm.

Main boom uses such connection type, realizes boom portion structural module, and stress is dispersed, while when transporting It can will carry out segmentation and dismantle transport, consequently facilitating transport.

Further, the connector includes the first connector, the second connector and third connector, and the first connector is solid Surely it is connected between arm root section, the second connector is fixedly connected in arm between section, and third connector is fixedly connected on arm spike knot Between.

Connector is set between two booms, improves the stability of boom, the second connector can be according to boom portion master The length of boom, is arranged two or more, to guarantee the structural strength in boom portion.

Further, winch, two vertical bars are respectively equipped on the position of two vertical bars on the revolving platform Top be respectively equipped with top pulleys group, the head of the main boom and secondary boom is respectively equipped with head pulley blocks, the winch Inside it is extended with wirerope, wirerope pile warp vertical bar top pulleys group and is wrapped on corresponding head pulley blocks respectively.

First main boom and the second main boom head are equipped with head pulley blocks, and the steel wire difference pile warp of winch extraction is respectively Corresponding vertical bar top pulleys group, and it is respectively wound around the head pulley of corresponding main boom head pulley blocks or secondary boom In group, avoid interfering with spud leg, while being distributed to tension uniform on two booms, realize two booms it is uniform by Power, so that the stability of boom is more preferable.

Detailed description of the invention

Fig. 1 is a kind of parallel crane main view of both arms of the utility model.

Fig. 2 is a kind of parallel crane left view of both arms of the utility model.

Fig. 3 is the portion the A enlarged drawing of Fig. 1.

Fig. 4 is the main view of the pedestal of the utility model.

Fig. 5 is the top view of the pedestal of the utility model.

Fig. 6 is the sectional view of B-B in Fig. 5.

Fig. 7 is the main view of the revolving platform of the utility model.

Fig. 8 is the top view of the revolving platform of the utility model.

Fig. 9 is the structural schematic diagram in the boom portion of the utility model.

Specific embodiment

The utility model is described in further details with reference to the accompanying drawings and detailed description.

FIG. 1 to FIG. 9 shows the embodiments of the present invention.

A kind of parallel crane of both arms, including pedestal 1, pivoting support 2, revolving platform 3, device for revolving and driving 4, tripod 5 and Dual-arm crane arm 6, the top of pedestal 1 connect with the outer ring screw rod of pivoting support 2, the bottom of revolving platform 3 and pivoting support 2 inner ring screw rod connection, tripod 5 are fixedly mounted on the top of revolving platform 3, and Dual-arm crane arm 6 is hinged on revolving platform 3 On, pedestal 1 be bottom surface section be rectangle, top surface section is circular hollow base, on the top of pedestal 1 be equipped with upwardly extend The first cylinder 7, set on hollow base inner wall and the inner wall of the first cylinder 7 from the bottom of pedestal 1 to the top of the first cylinder 7 There are the evenly arranged base reinforcing ribs board group of the peripheral direction along pedestal extended up and down, all bottoms in base reinforcing ribs board group The central axis direction of seat stiffener plate 71 towards the first cylinder 7 is arranged；In section be rectangle and section is circular transition portion Base reinforcing ribs plate there is inside protrusion 700, be arc transition between the lower end and base reinforcing ribs plate of protrusion 700；The One cylinder, 7 cross-sectional area is less than the area of the bottom surface rectangle of pedestal 1, and the central axis of the first cylinder 7 is parallel to the bottom surface of pedestal 1 Central axis, and the center of the bottom surface of pedestal 1 to the first cylinder 7 central axis distance be greater than 0.

Pile is sequentially inserted into pedestal 1, pivoting support 2, revolving platform 3 from the bottom to top, is then passed through deck, is fixed on seabed, Stability is high, and impact resistance ability is strong, compared to the prior art a kind of Large slalom crane for offshore platform, Dual-arm crane arm 6 Using parallel double booms, boom structure stability is good, elevating capacity is big, and elevating capacity is bigger, and bearing capacity is stronger；Compared to existing There are technology Large slalom crane for offshore platform and a kind of both arms derrick crane, is equipped on the top of pedestal 1 and prolongs upwards The structure of the first cylinder 7 stretched, with the outer ring screw rod connection for facilitating and rotationally supporting, since the central axis of the first cylinder 7 is parallel Central axis in 1 bottom surface of pedestal, and the distance of central axis of the center of 1 bottom surface of pedestal to the first cylinder 7 is greater than 0, i.e. pedestal 1 Central axis deviates the central axis of the first cylinder 7, so that being located at the reinforcement of 6 link position side of Dual-arm crane arm on pedestal 1 The length of muscle increases.

Pedestal 1 is the main force part of whole device, and one end force analysis of Dual-arm crane arm 6 is housed to pedestal 1, When transferring cargo rotation arrival suitable position all standing, due to effect of inertia, exist in cross-sectional circumferential tangential direction in pedestal 1 Torque stress, this stress be easy to cause pedestal torsional deformation, while cargo is hung in boom head, and pulls boom downward, the bottom of at There are moment of flexure stress on seat section, tripod 5, wirerope, winch 8 etc. are placed on article on revolving platform 3, pivoting support, return Turn the weight such as platform 3, Dual-arm crane arm 6 and 1 own wt of pedestal acts on and gives deck pressure, it is former according to active force and reaction force Reason, deck, which acts on, gives pedestal one supporting force, this active force is dispersed in base wall, along base wall direction obliquely, this Supporting force is decomposed into and stress and is horizontally directed to center axial stress straight up, this straight up stress and moment of flexure stress in pedestal Upper composition relative direction stress, causes to squeeze, pedestal 1 is be easy to cause to be bent, fracture in the axial direction to pedestal 1, compared to existing There are technology Large slalom crane for offshore platform and a kind of both arms derrick crane, in the present invention, the first cylinder 7 The center of central axis only 1 bottom surface of pedestal keeps the floor space close to 6 one end pedestal of Dual-arm crane arm larger, to make close to double 6 one end pedestal volume of arm boom portion is larger, and wall thickness is thicker, and inner wall area is larger, and reinforcing rib is longer, more, makes boom one end bottom The intensity and rigidity of seat increase, and bending resistance enhancing prevents pedestal to be distorted, deform or is bent, fractures；Stiffener plate The central axis direction of all base reinforcing ribs plates towards the first cylinder 7 is arranged in group, and the weight for being conducive to revolving platform is equal downwards It is even to be dispersed on pedestal and reinforcing rib；1 bottom of pedestal is rectangle, so that all composition is most steady for the face infall of 1 bottom of pedestal four Fixed right angle increases the stability of crane；7 cross-sectional area of the first cylinder of extension is less than the area of bottom surface rectangle, bottom Seat is increased base bottom and contacted with deck and be formed by supporting surface using the big structure of upper handle, keeps pedestal stability higher, Impact resistance is stronger；A kind of both arms derrick crane compared to the prior art, the parallel crane of the both arms have rotary lifting Machine pivoting support and revolving platform, can be realized rotatable, and axial 90 ° and radial 360 ° of rotations may be implemented in boom, therefore answer It is strong with property, can opereating specification it is big, adaptable, service efficiency is high；Meanwhile when the big load of carrying 1200t, slewing equipment is needed Volume is larger, uses pivoting support as slewing equipment at this time, compact-sized simple, can bear simultaneously axial force, radial force and Tilting moment, it is practical.

In addition to the transition position in rectangular section and circular cross-section is neat with the rectangular section of outer base and circular cross-section Molecules align, and since the transition position of rectangular section and circular cross-section forms abrupt change of cross-section situation, rectangular section and circle Molecule changes in the structure of the transition position of tee section, changes whole stress, also change the mutation punishment son by Power state and balance, by analysis, pedestal receives downward pressure F1, bending force F2 and distortion power F3, and due to the mutation The molecular structure change dramatically at place, rectangular section and circular cross-section interior molecules are uniformly distributed, and stress is also just uniformly distributed, rectangle The active force of the transition position of the section and circular cross-section resistance external force bigger since molecular change produces, makes rectangular section and circle The stress of the transition position of tee section becomes much larger, and forms stress and concentrates, and the stress at this is greater than the limit stress of material, then can It destroys pedestal and causes serious accident, concentrated in order to avoid stress and destroy pedestal, the mistake in rectangular section and circular cross-section The place of crossing is also provided with convex portion 700 other than being additionally arranged base reinforcing ribs plate, which provides and stress side It to roughly the same power, is under pressure with increasing resistance pedestal 1, the active force of bending force, distortion power, which is located at square The partial below of tee section and the transition position of circular cross-section, when the rectangular section of pedestal and the transition position of circular cross-section receive bending When power, convex portion is equivalent to the active force given obliquely, increases and resists the active force that pedestal 1 receives bending force, certainly The protrusion can also play the role of keeping out pressure and distortion power, so that the intensity at mutation is more reliable, in the lower end of protrusion Circular arc is set between base reinforcing ribs plate, avoids the formation of the phenomenon that stress is concentrated.In conclusion base reinforcing ribs plate and protrusion 700 can greatly improve the intensity of the pedestal abrupt-change cross section, improve security performance.

Revolving platform 3 includes the four prisms cylinder 31 with cavity, the second cylinder 32 and the plectane 33 equipped with hollow structure, and four Prism 31 includes rectangular-shaped top plate 311, the rectangular base plate 312 equipped with circular hollow structure equipped with circular hollow structure, rectangle Bottom plate includes the first rectangular base plate 3121 being sequentially connected, the second rectangular base plate 3122, third rectangular base plate 3123, the first rectangle Bottom plate 3121 is obliquely installed with the second rectangular base plate 3122, and third rectangular base plate 3123 is set with the inclination of the second rectangular base plate 3122 It sets, the first rectangular base plate 3121 and third rectangular base plate 3123 are arranged in parallel.

The top of the second cylinder 32 is located in four prisms cylinder 31, and the rectangular top at the top of the second cylinder 32 and four prisms cylinder The bottom surface of plate 311 is welded, and the welding of 32 bottom of the second cylinder is equipped with the plectane 33 of circular hollow structure, and the second circle is located on plectane 33 The interior mounting hole 3311 equipped with two or more pivoting supports of cylinder 32 and 33 weld of plectane, the rectangular-shaped top plate of four prisms cylinder The central axis of circular hollow structure, the second cylinder 32 in the rectangular base plate 312 of circular hollow structure central axis, quadrangular on 311 Central axis, 33 circular hollow structure central axis of plectane and 7 central axis of the first cylinder are point-blank；The inner wall of the second cylinder 32 It is evenly distributed with the first reinforcing rib board group 321 in the radial direction along the second cylinder, in four prisms cylinder 31 outside the second cylinder 32 It has been distributed the second reinforcing rib board group 322 in the radial direction along the second cylinder 32 on wall, has been equipped with inside four prisms cylinder 31 Third reinforcing rib board group installing zone, third reinforcing rib board group installing zone are located at turn around 6 opposite side of Dual-arm crane arm on platform 3, And cross reinforcing board group 3231 and waling board group 3232 are equipped in third reinforcing rib board group installation region.

When the big load operation of crane progress 1200t, in order to meet the requirement that maximum hoisting hook carries, large size can be also selected Number tripod, winch and the wirerope being relatively large in diameter, so that tripod, the structure of winch and steel wire and weight are also larger, second The second cylinder outer wall, four prisms cylinder are internally located on revolving platform Dual-arm crane arm with respect to one in the inner wall of cylinder, tetragonous main body Side is mounted on reinforcing rib board group, enhances the intensity at the top of revolving platform axially and radially, rigidity and resists bending ability, prevents Only bearing article weight is excessive on revolving platform, causes the fracture of revolving platform；The welding of cavity four prisms cylinder rectangular-shaped top plate bottom Cylinder, bottom of cylinder welding are equipped with the plectane of circular hollow structure, and plectane is connected with the inner ring screw rod for facilitating and rotationally supporting, circle Cylinder is to increase friction in order to avoid contacting in revolving platform rotary course with base top, hinders rotation；Revolving platform rectangular top The hollow structure of plate, the second cylinder, the hollow structure of rectangular base plate, plectane hollow structure central axis point-blank, And towards being hinged with the one end in boom portion, in order to pedestal in pile both sides equalising torque.

The diagonal position of quadrangular rectangular-shaped top plate 311 is equipped with the four groups of tripod upwardly extended installation panels 3111, often Group tripod installation panel includes two the first installation panels 31111 being oppositely arranged, and each first installation panel is equipped with Tripod mounting hole, tripod 5 include two door frame components 52 being oppositely arranged and first crossbar 51, two door frame components point It is not welded on the both ends of first crossbar 51, each door frame component includes the first brace 521 and vertical bar 522, the bottom end of vertical bar 522 It is fixedly mounted on position opposite with Dual-arm crane arm 6 on revolving platform 3, and perpendicular to revolving platform 3, the first brace 521 Bottom end is fixedly mounted on the position on revolving platform 3 close to Dual-arm crane arm 6, top and the vertical bar 522 of the first brace 521 Top connection, is equipped with second crossbar 523 and the second brace 524, the second brace 524 on 521 lower middle position of the first brace One end be connected with the first brace 521, the other end of the second brace 524 is connected with second crossbar 523, second crossbar 523, second First brace 521 of brace 524 and door frame component constitutes three-legged structure.

Door frame component is arranged symmetrically relative to pile, and the vertical bar of door frame component, brace bottom end are fixedly mounted on revolving platform Upper and fixed deck constitutes stable triangular structure, to improve the structural stability of door frame component and the convenience of maintenance Property；Meanwhile being connected by first crossbar with two 53 components of crossbar between two door frame components, to further increase door frame The stability of component.

Second crossbar and the second brace are set in brace lower middle position, constitute three-legged structure, boom with the first brace Boom is resisted when rising to vertical position, translates into the other side to prevent boom, the stability and impact resistance ability of three-legged structure are stronger.

Quadrangular rectangular-shaped top plate 311 is equipped with the two groups of Dual-arm crane arm upwardly extended peaces close to the side of Dual-arm crane arm 6 Dress panel 3112, the second installation panels 31121 that every group of Dual-arm crane arm installation panel 3112 is oppositely arranged including two, second The mounting hole that panel is equipped with Dual-arm crane arm 6 is installed.

Tripod mounting hole is distributed on the diagonal position of quadrangular rectangular-shaped top plate, so that tripod weight is evenly distributed on On revolving platform, to improve the stability of crane.

Dual-arm crane arm 6 includes main boom and secondary boom 63, and secondary boom tail portion is connected with the head of main boom, main boom with Secondary boom 63 is equipped with hook assembly；Main boom includes the first main boom 61 and the second main boom 62, the first main boom 61 and the Two main booms 62 are arranged side by side and are fixed by connector 64, and the first main boom 61 and the second main boom 62 respectively correspond a door Frame component.

Such arm structure, stress are dispersed, so that structure is more stable, intensity is improved, the lifting of crane arm Performance improves, it can be achieved that crane arm structural module.

First main boom 61 and the second main boom 62 are made of section and arm spike knot in arm root section, arm, are saved in arm root section, arm It is detachably connected with arm spike knot.

Main boom uses such connection type, realizes boom structure modularization, and stress is dispersed, and can incite somebody to action in transport It is dismounted, and is readily transported.

Connector 64 includes the first connector 641, the second connector 642 and third connector 643, the first connector 641 It is fixedly connected between arm root section, the second connector 642 is fixedly connected in arm between section, and third connector 643 is fixedly connected Between arm spike knot.

Connector is set between two booms, improves the stability of boom, the second connector 642 can be according to boom portion The length of main boom, is arranged two or more, to guarantee the structural strength in boom portion.

The circumferential position that two sides are located at the second cylinder 32 on plectane 33 is respectively equipped with protrusion panel 331, protrudes on panel 331 It is uniformly distributed the mounting hole group 332 equipped with device for revolving and driving 4, device for revolving and driving mounting hole group 332 is located at tripod installation Panel 3111 and Dual-arm crane arm installation panel 3112 between (i.e. positioned at the same side two tripods installation panel 3111 it Between), each device for revolving and driving mounting hole group 332 includes two or more revolution driving mounting hole, in the present embodiment, in three feet Device for revolving and driving mounting hole group 332 there are two being set between frame installation panel 3111 and Dual-arm crane arm installation panel 3112, and Device for revolving and driving mounting hole group 332 is symmetrical set, and each device for revolving and driving mounting hole group 332 includes five revolution drivings Mounting hole, one end of device for revolving and driving 4 pass through device for revolving and driving mounting hole and are meshed with the outer ring of pivoting support 2, turn round The other end of driving device 4 is fixed on the plectane 33 of quadrangular.

When crane carries out big load operation, revolving platform volume is larger, and more device for revolving and driving is needed to be driven Dynamic rotation, while needing to share the weight of a part of rotating platform, it is symmetrical arranged, so that both sides drive rotation simultaneously, rotates More easily, while uniformly the weight for sharing rotating platform, being conducive to balance prevents from toppling.

Winch 8, the top part of two vertical bars 522 are respectively equipped on the position of two vertical bars 522 on revolving platform 3 Not She You top pulleys group 5221, main boom head is respectively equipped with head pulley blocks 65, is extended with wirerope 9 in the winch 8, Wirerope 9 distinguishes the top pulleys group 5221 of pile warp vertical bar 522, and is respectively wound around the head pulley blocks of main boom or secondary boom On 65.

The steel wire of winch extraction distinguishes the corresponding vertical bar top pulleys group of pile warp, and is respectively wound around corresponding On the head pulley blocks of main boom head pulley blocks or secondary boom, avoids negotiating with spud leg or two groups of steel wire windings happens, Being distributed to tension uniform on two booms simultaneously, realizes the uniform stressed of two booms, so that the stability of boom is more It is good.

The parallel crane of the both arms of the utility model is at work, comprising the following steps:

1) preparation, revolving platform 3 are located at initial position；

2) start device for revolving and driving 4, device for revolving and driving 4 drives pivoting support 2 and revolving platform 3 is driven to produce The central axis of the center line connecting direction of the center of the first cylinder and 1 bottom surface rectangle of pedestal and close base end face rectangle on pedestal 1 Position；

3) starting Dual-arm crane arm 6 carries out transferring work；

4) control revolving platform 3, which rotates to, transfers object placement region and places；

5) control revolving platform 3 is turned back to the home position of Dual-arm crane arm 6.

Pile is sequentially inserted into pedestal 1, pivoting support 2, revolving platform 3 from the bottom to top, is then passed through deck, is fixed on seabed, Stability is high, and impact resistance ability is strong, compared to the prior art a kind of Large slalom crane for offshore platform, Dual-arm crane arm 6 Using parallel double booms, boom structure stability is good, elevating capacity is big, and elevating capacity is bigger, and bearing capacity is stronger；Compared to existing There are technology Large slalom crane for offshore platform and a kind of both arms derrick crane, is equipped on the top of pedestal 1 and prolongs upwards The structure of the first cylinder 7 stretched, with the outer ring screw rod connection for facilitating and rotationally supporting, since the central axis of the first cylinder 7 is parallel Central axis in 1 bottom surface of pedestal, and the distance of central axis of the center of 1 bottom surface of pedestal to the first cylinder 7 is greater than 0, i.e. pedestal 1 Central axis deviates the central axis of the first cylinder 7, so that being located at the reinforcement of 6 link position side of Dual-arm crane arm on pedestal 1 The length of muscle increases.

Pedestal 1 is the main force part of whole device, and one end force analysis of Dual-arm crane arm 6 is housed to pedestal 1, When transferring cargo rotation arrival suitable position all standing, due to effect of inertia, exist in cross-sectional circumferential tangential direction in pedestal 1 Torque stress, this stress be easy to cause pedestal torsional deformation, while cargo is hung in boom head, and pulls boom downward, the bottom of at There are moment of flexure stress on seat section, tripod 5, wirerope, winch 8 etc. are placed on article on revolving platform 3, pivoting support, return Turn the weight such as platform 3, Dual-arm crane arm 6 and 1 own wt of pedestal acts on and gives deck pressure, it is former according to active force and reaction force Reason, deck, which acts on, gives pedestal one supporting force, this active force is dispersed in base wall, along base wall direction obliquely, this Supporting force is decomposed into and stress and is horizontally directed to center axial stress straight up, this straight up stress and moment of flexure stress in pedestal Upper composition relative direction stress, causes to squeeze, pedestal 1 is be easy to cause to be bent, fracture in the axial direction to pedestal 1, compared to existing There are technology Large slalom crane for offshore platform and a kind of both arms derrick crane, in the present invention, the first cylinder 7 The center of central axis only 1 bottom surface of pedestal keeps the floor space close to 6 one end pedestal of Dual-arm crane arm larger, to make close to double 6 one end pedestal volume of arm boom portion is larger, and wall thickness is thicker, and inner wall area is larger, and reinforcing rib is longer, more, makes boom one end bottom The intensity and rigidity of seat increase, and bending resistance enhancing prevents pedestal to be distorted, deform or is bent, fractures；Stiffener plate The central axis direction of all base reinforcing ribs plates towards the first cylinder 7 is arranged in group, and the weight for being conducive to revolving platform is equal downwards It is even to be dispersed on pedestal and reinforcing rib；1 bottom of pedestal is rectangle, so that all composition is most steady for the face infall of 1 bottom of pedestal four Fixed right angle increases the stability of crane；7 cross-sectional area of the first cylinder of extension is less than the area of bottom surface rectangle, bottom Seat is increased base bottom and contacted with deck and be formed by supporting surface using the big structure of upper handle, keeps pedestal stability higher, Impact resistance is stronger；A kind of both arms derrick crane compared to the prior art, the parallel crane of the both arms have rotary lifting Machine pivoting support and revolving platform, can be realized rotatable, and axial 90 ° and radial 360 ° of rotations may be implemented in boom, therefore answer It is strong with property, can opereating specification it is big, adaptable, service efficiency is high；Meanwhile when the big load of carrying 1200t, need to turn round dress It is larger to set volume, uses pivoting support as slewing equipment at this time, it is compact-sized simple, axial force, radial force can be born simultaneously And tilting moment, it is practical.

In addition to the transition position in rectangular section and circular cross-section is neat with the rectangular section and circular cross-section of outer base Molecules align, and the transition position of rectangular section and circular cross-section forms abrupt change of cross-section situation, therefore, rectangular section and circle are cut Molecule changes in the structure of the transition position in face, changes whole stress, also changes the stress shape of mutation punishment State and balance, by analysis, pedestal receives downward pressure F1, bending force F2 and distortion power F3, and due to the mutation at Molecular structure change dramatically, rectangular section and circular cross-section interior molecules are uniformly distributed, and stress is also just uniformly distributed, rectangular section The active force of the resistance external force bigger since molecular change produces with the transition position of circular cross-section makes rectangular section and round section The stress of the transition position in face becomes much larger, and forms stress and concentrates, and the stress at this is greater than the limit stress of material, then can destroy Pedestal causes serious accident, concentrates in order to avoid stress and destroys pedestal, the transition position in rectangular section and circular cross-section Other than being additionally arranged base reinforcing ribs plate, it is also provided with convex portion 700, which provides big with stress direction Identical power is caused, is under pressure with increasing resistance pedestal 1, the active force of bending force, distortion power, which cuts positioned at rectangle The partial below of the transition position of face and circular cross-section, when the rectangular section of pedestal and the transition position of circular cross-section receive bending force When, convex portion is equivalent to the active force given obliquely, increases and resists the active force that pedestal 1 receives bending force, certainly should Protrusion can also play the role of keeping out pressure and distortion power so that the intensity at mutation is more reliable, protrusion lower end with Circular arc is set between base reinforcing ribs plate, avoids the formation of the phenomenon that stress is concentrated.In conclusion base reinforcing ribs plate and protrusion 700 can greatly improve the intensity of the pedestal abrupt-change cross section, improve security performance.

Claims (7)

1. a kind of parallel crane of both arms, including pedestal, pivoting support, revolving platform, device for revolving and driving, tripod and both arms The outer ring screw rod of boom portion, base top and pivoting support connects, and the bottom of revolving platform and the inner ring screw rod of pivoting support connect It connects, tripod is fixedly mounted on the top of revolving platform, and Dual-arm crane arm is hinged on revolving platform, it is characterised in that: described Pedestal be bottom surface section be rectangle, top surface section is circular hollow base, be equipped with the upwardly extended at the top of the base One cylinder, from base bottom to the first cylinder, top is equipped with the edge extended up and down on hollow base inner wall and the first cylinder inner wall The evenly arranged base reinforcing ribs board group of peripheral direction of pedestal, all base reinforcing ribs plates in the base reinforcing ribs board group It is arranged towards the central axis direction of the first cylinder；In section be rectangle and section is the base reinforcing ribs plate of circular transition portion It is arc transition between raised lower end and base reinforcing ribs plate with inside protrusion；The first cylinder cross-sectional area is less than The area of base end face rectangle, the central axis of the first cylinder is parallel to the central axis of base end face, and the center of base end face is arrived The distance of the central axis of the first cylinder is greater than 0；

Revolving platform includes the four prisms cylinder with cavity, the second cylinder and the plectane equipped with hollow structure, the four prisms cylinder Including being equipped with the rectangular-shaped top plate of circular hollow structure, equipped with the rectangular base plate of circular hollow structure, rectangular base plate includes successively phase The first rectangular base plate even, the second rectangular base plate, third rectangular base plate, the first rectangular base plate are set with the inclination of the second rectangular base plate It sets, third rectangular base plate is obliquely installed with the second rectangular base plate, and the first rectangular base plate and third rectangular base plate are arranged in parallel；

The top of described the second cylinder is located in four prisms cylinder, and the bottom of the rectangular-shaped top plate at the top and four prisms cylinder of the second cylinder Face welding, the welding of the second cylinder bottom are equipped with the plectane of circular hollow structure, are located at the second cylinder and plectane weld on plectane Inner circumferential be equipped with the mounting holes of two or more pivoting supports, in the rectangular-shaped top plate of the four prisms cylinder in circular hollow structure The central axis, the second cylinder central axis of circular hollow structure in mandrel, the rectangular base plate of quadrangular, in plectane circular hollow structure Mandrel and the first cylinder central axis are point-blank；The inner wall of the second cylinder uniformly divides in the radial direction along the second cylinder It is furnished with the first reinforcing rib board group, being distributed in the radial direction along the second cylinder on the second cylinder outer wall in four prisms cylinder Second reinforcing rib board group, four prisms cylinder inside are equipped with third reinforcing rib board group installing zone, and third reinforcing rib board group installing zone is located at Dual-arm crane arm opposite side on revolving platform, and be equipped with cross reinforcing board group in third reinforcing rib board group installation region and indulge To reinforcing rib board group.

2. the parallel crane of both arms according to claim 1, it is characterised in that: the diagonal bits of the quadrangular rectangular-shaped top plate It sets and is equipped with the four groups of tripod upwardly extended installation panels, it includes first that two are oppositely arranged that every group of tripod, which installs panel, Panel is installed, and each first installation panel is equipped with tripod mounting hole, the quadrangular rectangular-shaped top plate is close to both arms boom The side in portion is equipped with the two groups of Dual-arm crane arm upwardly extended installation panels, and every group of Dual-arm crane arm installation panel includes two phases Panel is installed to the second of setting, the second installation panel is equipped with Dual-arm crane arm mounting hole；

Two sides are located at the second cylinder circumferential position and are respectively equipped with device for revolving and driving mounting hole group on the plectane, revolution driving dress It sets mounting hole group to be located between tripod installation panel and Dual-arm crane arm installation panel, each device for revolving and driving mounting hole group Including two or more revolution driving mounting hole, one end of device for revolving and driving passes through device for revolving and driving mounting hole and revolution branch The outer ring held is meshed, and the other end of device for revolving and driving is fixed on the plectane of quadrangular.

3. the parallel crane of both arms according to claim 1, it is characterised in that: the tripod includes two and is oppositely arranged Door frame component and first crossbar, two door frame components be respectively welded at the both ends of first crossbar, each door frame component is equal Including vertical bar and the first brace, the bottom end of the vertical bar is fixedly mounted on position opposite with Dual-arm crane arm on revolving platform, And perpendicular to revolving platform, the bottom end of first brace is fixedly mounted on revolving platform close to Dual-arm crane arm position, institute The top for stating the first brace is connect with the top of the vertical bar, and second crossbar and the are equipped on the first brace lower middle position Two braces, one end of the second brace are connected with the first brace, and the other end of the second brace is connected with second crossbar, second crossbar, First brace of the second brace and door frame component constitutes three-legged structure.

4. the parallel crane of both arms according to claim 3, it is characterised in that: the Dual-arm crane arm include main boom and Secondary boom, secondary boom tail portion are connected with the head of main boom, and main boom and secondary boom are equipped with hook assembly；The main boom packet The first main boom and the second main boom are included, the first main boom and the second main boom are arranged side by side and fix by connector, described The first main boom and the second main boom respectively correspond a door frame component.

5. the parallel crane of both arms according to claim 4, it is characterised in that: the main boom of described first and the second master hang Arm is made of section and arm spike knot in arm root section, arm, and section and arm spike knot are detachably connected in arm root section, arm.

6. the parallel crane of both arms according to claim 4, it is characterised in that: the connector include the first connector, Second connector and third connector, the first connector are fixedly connected between arm root section, and the second connector is fixedly connected on arm Between middle section, third connector is fixedly connected between arm spike knot.

7. the parallel crane of both arms according to claim 4, it is characterised in that: close to described in two on the revolving platform It is respectively equipped with winch on the position of vertical bar, top pulleys group, the main boom and secondary boom are respectively equipped at the top of two vertical bars Head be respectively equipped with head pulley blocks, be extended with wirerope in the winch, wirerope distinguishes pile warp vertical bar top pulleys group And it is wrapped on corresponding head pulley blocks.